A high temperature resistant inspection door with pressure relief device for air conditioning box and use method thereof

Abstract

The present invention discloses a high temperature resistant inspection door with a pressure relief device for an air conditioning box, comprising a door frame, an arc-shaped sealing strip, a door panel and a pressure relief device, wherein the arc-shaped sealing strip is arranged at the joint between the acute angle of the bevel of the inspection door outer frame and the obtuse angle of the bevel of the inspection door inner frame, the door panel is fixed between the inspection door outer frame and the inspection door inner frame, the fireproof and high temperature resistant rock wool layer is filled between the outer panel and the inner panel, the pressure relief device comprises a door handle, a connecting rod and a door buckle, the two door buckles are arranged vertically, and the door buckle close to the inner panel is locked on the inspection door outer frame. The present invention can effectively improve the sealing of the overall inspection door, can effectively save the operating energy consumption of the air conditioning unit, greatly save the operating cost, has high temperature resistance and fire resistance, so that when the air conditioning box is under positive pressure, the inspection door will not open quickly, effectively protecting personnel, the inspection door and the outer panel of the unit.

Description

Technical Field

[0001] The present invention relates to the technical field of air-conditioning spare parts, and particularly to a high-temperature resistant inspection door with a pressure relief device for an air-conditioning box and a using method thereof. Background Art

[0002] In order to facilitate the maintenance of air-conditioning equipment, an inspection door is usually provided on the air-conditioning box body. When there is a fault in the internal components of the air conditioner, technicians can directly open the inspection door to repair the equipment inside the air conditioner. During the use of the air-conditioning equipment, positive pressure or negative pressure will be generated inside. The inspection door usually needs to use two different structures of inward-opening inspection doors or outward-opening inspection doors, which is not convenient for design and installation, and the inward-opening inspection door will also occupy a large space. Therefore, it is necessary to adopt a general inspection door that can be applied to both positive and negative pressures. At present, many manufacturers have developed general inspection doors that can be opened in both positive and negative pressures.

[0003] For example, a Chinese patent with the authorization announcement number CN201510331192 discloses a double-opening air-conditioning inspection door. The core board of this inspection door is filled with polyurethane foam material, which cannot achieve fire prevention and high-temperature resistance; this inspection door uses an aluminum alloy outer frame strip to achieve the function of double-opening doors. When opening the positive-pressure outward-opening inspection door, the pressure inside the air-conditioning box is not balanced before opening. At this time, the inspection door will open quickly, which is very easy to collide with people, damage the inspection door and the outer panel of the unit, etc. Summary of the Invention

[0004] The purpose of the present invention is to provide a high-temperature resistant inspection door with a pressure relief device for an air-conditioning box and a using method thereof, which can effectively improve the sealing performance of the overall inspection door, effectively save the operating energy consumption of the air-conditioning unit, greatly save the operating cost, has high-temperature resistance and fire prevention performance, so that when the pressure inside the air-conditioning box is positive, the inspection door will not open quickly, effectively protecting personnel, the inspection door and the outer panel of the unit, so as to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A high-temperature resistant inspection door with a pressure relief device for an air-conditioning box, comprising:

[0007] A door frame, the door frame is fixed on the air-conditioning box, and the door frame includes an outer inspection door frame and an inner inspection door frame;

[0008] An arc-shaped sealing strip, the arc-shaped sealing strip is arranged at the butt joint of the acute angle of the hypotenuse of the outer inspection door frame and the obtuse angle of the hypotenuse of the inner inspection door frame;

[0009] A door panel, the door panel is fixed between the outer inspection door frame and the inner inspection door frame, and the door panel includes an outer plate, an inner plate and a fireproof and high-temperature resistant rock wool layer, and the fireproof and high-temperature resistant rock wool layer is filled between the outer plate and the inner plate;

[0010] A pressure relief device, the pressure relief device includes a door handle, a connecting rod and a door buckle. The connecting rod is rotatably connected to the door panel. The door handle is fixed to one end of the connecting rod close to the outer plate. There are two door buckles, and the two door buckles are fixed to one end of the connecting rod close to the inner plate. The two door buckles are vertically arranged, and the door buckle close to the inner plate is locked on the outer frame of the inspection door;

[0011] A buckle mechanism. The connecting rod is rotatably connected to the mounting hole on the door panel through four buckle mechanisms arranged at equal angles in a circle. The buckle mechanism includes a sleeve, a spring, a ball and a slot. The sleeve is embedded in the wall of the mounting hole on the door panel. The spring and the ball are both arranged in the inner cavity of the sleeve. Two ends of the spring respectively abut against the inner wall of the sleeve and the ball. The slot is opened on the outer surface of the connecting rod, and one side of the ball away from the spring abuts in the slot.

[0012] Preferably, the arc-shaped sealing strip is a polyurethane foam sealing strip with an obtuse arc-shaped structure.

[0013] Preferably, the door panel further includes two fiberglass mesh layers, and the two fiberglass mesh layers are respectively bonded to both sides of the fireproof and high-temperature resistant rock wool layer.

[0014] Preferably, the outer frame of the inspection door is made of a high-temperature resistant aluminum-plastic alloy composite profile.

[0015] Preferably, both the outer plate and the inner plate are made of metal materials.

[0016] Preferably, the preparation method of the fireproof and high-temperature resistant rock wool layer includes the following steps:

[0017] S1. Mix basalt, white rock, shale, slag and aluminum silicate, and after mixing, crush and screen through a stone crusher to obtain a mixed raw material;

[0018] S2. Preheat the mixed raw material, and after preheating, melt it to obtain a mixed solution;

[0019] S3. Centrifuge the mixed solution into fibrous form, and spray phenolic resin during centrifugation, and collect the fiber strips through a cotton collecting machine;

[0020] S4. Add the fiber strips and natural fiber strips through the pendulum method process and three-dimensional cotton laying, then put them into a mold, and demold after extrusion, stretching, pressing and cooling and curing.

[0021] Preferably, the aperture of the sieve holes in S1 is 80-200 meshes.

[0022] Preferably, in S2, the preheating temperature is 300 - 500 °C, and the melting temperature is 750 - 900 °C.

[0023] Preferably, in S3, the centrifugation speed is 500 - 600 r / min.

[0024] A method for using a high-temperature resistant inspection door with a pressure relief device for an air-conditioning box, comprising the following steps:

[0025] First, rotate the door handle 90°, and the two door latches also rotate 90°. The door latch close to the inner panel disengages from the outer frame of the inspection door, and the door latch far from the inner panel locks onto the outer frame 1 of the inspection door. At this time, there is a certain gap between the air-conditioning box and the door panel.

[0026] If the air-conditioning box is in negative pressure, external air enters the air-conditioning box through the gap until the pressure inside and outside the air-conditioning box reaches pressure balance. If the air-conditioning box is in positive pressure, the air in the air-conditioning box is discharged through the gap until the pressure inside and outside the air-conditioning box reaches pressure balance.

[0027] Then, rotate the door handle 90° in the original direction, so that the door latch far from the inner panel disengages from the outer frame of the inspection door, and the door panel can be opened outward.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] 1. By providing an arc-shaped sealing strip at the butt joint of the acute angle of the hypotenuse of the outer frame of the inspection door and the obtuse angle of the hypotenuse of the inner frame of the inspection door, the sealing performance of the overall inspection door is effectively improved, which can effectively save the operating energy consumption of the air-conditioning unit and greatly save the operating cost.

[0030] 2. By providing a fireproof and high-temperature resistant rock wool layer between the outer panel and the inner panel, and utilizing the fireproof and high-temperature resistant characteristics of rock wool, the inspection door has high-temperature resistance and fireproof performance.

[0031] 3. Adopting a general all-outward opening method saves the internal space of the air-conditioning box, and at the same time avoids interference between the inspection door and the internal parts of the air-conditioning box. Moreover, through the pressure relief device composed of the door handle, connecting rod and door latch on the inspection door, when the air-conditioning box is in positive pressure, the inspection door will not open quickly, effectively protecting personnel, the inspection door and the outer panel of the unit.

[0032] 4. When turning the door handle forcefully, the ball can disengage from the original engaged card slot until it is rotated 90° and then engaged into the next card slot, enabling accurate positioning of the door latch and preventing it from rotating by itself when the force is insufficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic structural diagram of the present invention;

[0034] Figure 2 Partial sectional view schematic of the door panel of the present invention;

[0035] Figure 3 Of the present invention Figure 1 Enlarged schematic at position A in

[0036] Figure 4 Structural schematic of the pressure relief device of the present invention;

[0037] Figure 5 Of the present invention Figure 1 Enlarged schematic at position B in

[0038] In the figure: 1, outer frame of the inspection door; 2, pressure relief device; 3, outer plate; 4, fireproof and high-temperature resistant rock wool layer; 5, inner plate; 6, door buckle; 7, arc-shaped sealing strip; 8, inner frame of the inspection door; 9, door handle; 10, connecting rod; 11, fiberglass mesh cloth layer; 12, buckle mechanism; 121, sleeve; 122, spring; 123, ball; 124, card slot. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] Please refer to Figures 1-5 , the present invention provides a technical solution:

[0041] A high-temperature resistant inspection door with a pressure relief device for an air-conditioning box, including a door frame and an arc-shaped sealing strip 7. The door frame is fixed on the air-conditioning box. The door frame includes an outer frame 1 of the inspection door and an inner frame 8 of the inspection door. The outer frame 1 of the inspection door adopts a high-temperature resistant aluminum-plastic alloy composite profile. The arc-shaped sealing strip 7 is arranged at the butt joint of the acute angle of the hypotenuse of the outer frame 1 of the inspection door and the obtuse angle of the hypotenuse of the inner frame 8 of the inspection door. The arc-shaped sealing strip 7 is a polyurethane foam sealing strip with an obtuse arc structure. The arc-shaped sealing strip 7 can also be made of other types of soft materials;

[0042] By arranging the arc-shaped sealing strip 7 at the butt joint of the acute angle of the hypotenuse of the outer frame 1 of the inspection door and the obtuse angle of the hypotenuse of the inner frame 8 of the inspection door, the sealing performance of the overall inspection door is effectively improved.

[0043] It also includes a door panel, which is fixed between the inspection door outer frame 1 and the inspection door inner frame 8. The door panel includes an outer panel 3, an inner panel 5, a fireproof and high-temperature resistant rock wool layer 4 and a glass fiber mesh cloth layer 11. The outer panel 3 and the inner panel 5 are both made of metal materials. The fireproof and high-temperature resistant rock wool layer 4 is filled between the outer panel 3 and the inner panel 5. Two glass fiber mesh cloth layers 11 are respectively bonded to the two side surfaces of the fireproof and high-temperature resistant rock wool layer 4;

[0044] By setting the fireproof and high temperature resistant rock wool layer 4 between the outer plate 3 and the inner plate 5, the fireproof and high temperature resistant properties of rock wool are utilized to make the inspection door have high temperature resistant and fireproof properties. At the same time, the high tensile strength of the fireproof and high temperature resistant rock wool layer 4 can be improved by relying on the high tensile strength of the glass fiber mesh cloth layer 11, making it less likely to delaminate and fall off, further enhancing the high temperature resistant and fireproof properties of the inspection door.

[0045] It also includes a pressure relief device 2, which includes a door handle 9, a connecting rod 10 and a door catch 6. The connecting rod 10 is rotatably connected to the door panel, the door handle 9 is fixed to one end of the connecting rod 10 close to the outer panel 3, two door catches 6 are provided, and the two door catches 6 are fixed to one end of the connecting rod 10 close to the inner panel 5. The two door catches 6 are vertically arranged, and the door catch 6 close to the inner panel 5 is locked on the outer frame 1 of the inspection door;

[0046] The universal full-outward opening method is adopted to save the internal space of the air-conditioning box, and at the same time avoid the interference between the inspection door and the internal parts of the air-conditioning box. The pressure relief device 2 composed of the door handle 9, connecting rod 10 and door buckle 6 on the inspection door ensures that when the air-conditioning box is under positive pressure, the inspection door will not open quickly, effectively protecting personnel, the inspection door and the outer panel of the unit.

[0047] The buckle mechanism 12, the connecting rod 10 is rotatably connected to the mounting hole on the door panel through four buckle mechanisms 12 arranged at equal angles in a circle, the buckle mechanism 12 includes a sleeve 121, a spring 122, a clamping ball 123 and a clamping groove 124, the sleeve 121 is embedded on the wall of the mounting hole on the door panel, the spring 122 and the clamping ball 123 are both arranged in the inner cavity of the sleeve 121, the two ends of the spring 122 are respectively abutted on the inner wall of the sleeve 121 and the clamping ball 123, the clamping groove 124 is provided on the outer surface of the connecting rod 10, and the side of the clamping ball 123 away from the spring 122 is abutted in the clamping groove 124;

[0048] When the door handle 9 is turned forcefully, the ball 123 can be disengaged from the previously engaged slot 124 until it is engaged in the next slot 124 after being rotated 90°, so that the position of the door catch 6 can be accurately located and it will not rotate itself when the force is insufficient.

[0049] The preparation method of the fireproof and high temperature resistant rock wool layer 4 comprises the following steps:

[0050] ​S1. Mix basalt, white rock, shale, slag and aluminum silicate, and after mixing, crush them with a stone crusher and then pass through a 150-mesh sieve to obtain a mixed raw material;

[0051] S2. Preheat the mixed raw material to 400 °C, and after preheating, melt it at 750 - 900 °C to obtain a mixed solution;

[0052] S3. Centrifuge the mixed solution into fibrous form, where the centrifuge speed is 550 r / min, and spray phenolic resin during centrifugation. After collection by a cotton collecting machine, a fiber strip is obtained;

[0053] S4. Combine the fiber strip and the natural fiber strip, add three-dimensional cotton laying through the pendulum method process, then put them into a mold, and demold after extrusion, stretching, pressing and cooling and curing.

[0054] The fireproof and high-temperature resistant rock wool layer 4 prepared by this preparation method has excellent fireproof and high-temperature resistant characteristics, making the inspection door have fireproof and high-temperature resistant performance.

[0055] A usage method of a high-temperature resistant inspection door with a pressure relief device for an air-conditioning box includes the following steps:

[0056] First, rotate the door handle 9 by 90°, and the two door latches 6 also rotate by 90°. The door latch 6 close to the inner plate 5 disengages from the inspection door outer frame 1, and the door latch 6 far from the inner plate 5 locks on the inspection door outer frame 1. At this time, there is a certain gap between the air-conditioning box and the door panel;

[0057] If the air-conditioning box is in negative pressure, external air enters the air-conditioning box through the gap until the pressure inside and outside the air-conditioning box reaches pressure balance. If the air-conditioning box is in positive pressure, the air in the air-conditioning box is discharged through the gap until the pressure inside and outside the air-conditioning box reaches pressure balance;

[0058] Then rotate the door handle 9 by 90° in the original direction, so that the door latch 6 far from the inner plate 5 disengages from the inspection door outer frame 1, and the door panel can be opened outwards.

[0059] In summary, by providing the arc-shaped sealing strip 7 at the butt joint of the acute angle of the hypotenuse of the outer frame 1 of the inspection door and the obtuse angle of the hypotenuse of the inner frame 8 of the inspection door, the sealing performance of the overall inspection door is effectively improved, the operating energy consumption of the air-conditioning unit can be effectively saved, and the operating cost is greatly reduced. By providing the fireproof and high-temperature resistant rock wool layer 4 between the outer plate 3 and the inner plate 5, and utilizing the fireproof and high-temperature resistant characteristics of the rock wool, the inspection door has high-temperature resistant and fireproof properties. The general all-outward opening method is adopted, which saves the internal space of the air-conditioning box and avoids interference between the inspection door and the internal parts of the air-conditioning box. Moreover, when the air-conditioning box is under positive pressure, the relief device 2 composed of the door handle 9, the connecting rod 10 and the door buckle 6 on the inspection door prevents the inspection door from opening quickly, effectively protecting personnel, the inspection door and the outer panel of the unit. When the door handle 9 is rotated forcefully, the locking ball 123 can disengage from the original engaged card slot 124 and be engaged in the next card slot 124 after rotating 90°, enabling the accurate positioning of the door buckle 6 and preventing it from rotating by itself when the force is insufficient.

[0060] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high temperature resistant inspection door with a pressure relief device for an air conditioning box, characterized in that: include: A door frame, the door frame being fixed on the air conditioning box, the door frame comprising an inspection door outer frame (1) and an inspection door inner frame (8); An arc-shaped sealing strip (7), the arc-shaped sealing strip (7) being arranged at the joint between the acute angle of the bevel of the inspection door outer frame (1) and the obtuse angle of the bevel of the inspection door inner frame (8); A door panel, the door panel being fixed between the inspection door outer frame (1) and the inspection door inner frame (8), the door panel comprising an outer panel (3), an inner panel (5) and a fireproof and high temperature resistant rock wool layer (4), the fireproof and high temperature resistant rock wool layer (4) being filled between the outer panel (3) and the inner panel (5); A pressure relief device (2), the pressure relief device (2) comprising a door handle (9), a connecting rod (10) and a door catch (6), the connecting rod (10) being rotatably connected to the door panel, the door handle (9) being fixed to one end of the connecting rod (10) close to the outer panel (3), two door catches (6) being provided, and the two door catches (6) being fixed to one end of the connecting rod (10) close to the inner panel (5), the two door catches (6) being arranged vertically, and the door catch (6) close to the inner panel (5) being locked to the outer frame (1) of the inspection door; A buckle mechanism (12), wherein the connecting rod (10) is rotatably connected to the mounting hole on the door panel through four buckle mechanisms (12) arranged at equal angles in a circle, the buckle mechanism (12) comprising a sleeve (121), a spring (122), a clamping ball (123) and a clamping groove (124), the sleeve (121) being embedded in the wall of the mounting hole on the door panel, the spring (122) and the clamping ball (123) being both arranged in the inner cavity of the sleeve (121), and the two ends of the spring (122) being respectively The connecting rod (10) is provided with a retaining groove (124) on the outer surface of the connecting rod (10), and the retaining ball (123) is retained in the retaining groove (124) on the side away from the spring (122); the arc-shaped sealing strip (7) is a polyurethane foam sealing strip with an obtuse arc-shaped structure; the door panel further comprises two glass fiber mesh cloth layers (11), and the two glass fiber mesh cloth layers (11) are respectively bonded to the two side surfaces of the fireproof and high temperature resistant rock wool layer (4).

2. A high temperature resistant inspection door with a pressure relief device for an air conditioning box according to claim 1, characterized in that: The inspection door outer frame (1) is made of a high temperature resistant aluminum-plastic alloy composite profile.

3. The high temperature resistant inspection door with a pressure relief device for an air conditioning box according to claim 1, characterized in that: The outer plate (3) and the inner plate (5) are both made of metal material.

4. The high temperature resistant inspection door with a pressure relief device for an air conditioning box according to claim 1, characterized in that: The method for preparing the fireproof and high temperature resistant rock wool layer (4) comprises the following steps: S1, mixing basalt, white rock, shale, slag and aluminum silicate, crushing them with a stone crusher and sieving them to obtain a mixed raw material; S2, preheating the mixed raw materials, and melting them after preheating to obtain a mixed solution; S3, converting the mixed solution into fibers by centrifugation, spraying phenolic resin during the centrifugation process, and collecting the fibers by a cotton collector to obtain fiber strips; S4. The fiber strips and natural fiber strips are placed in a mold through a pendulum process and three-dimensional cotton spreading, and then demolded after extrusion, stretching, pressing and cooling and curing.

5. The high temperature resistant inspection door with pressure relief device for an air conditioning box according to claim 4, characterized in that: The sieve holes in S1 have a diameter of 80-200 meshes.

6. The high temperature resistant inspection door with a pressure relief device for an air conditioning box according to claim 4, characterized in that: The preheating temperature in S2 is 300-500°C, and the melting temperature is 750-900°C.

7. The high temperature resistant inspection door with a pressure relief device for an air conditioning box according to claim 4, characterized in that: The centrifugal speed in S3 is 500-600r / min.

8. A method for using a high temperature resistant inspection door with a pressure relief device of an air conditioning box according to any one of claims 1 to 7, characterized in that: The steps include: First, the door handle (9) is rotated 90°, and the two door catches (6) are also rotated 90°, so that the door catch (6) close to the inner plate (5) is separated from the outer frame (1) of the inspection door, and the door catch (6) away from the inner plate (5) is locked on the outer frame (1) of the inspection door. At this time, there is a certain gap between the air conditioner box and the door plate; If the air conditioning box is under negative pressure, the outside air will enter the box through the gap until the pressure inside and outside the box is balanced. If the air conditioning box is under positive pressure, the air in the box will be discharged from the box through the gap until the pressure inside and outside the box is balanced. The door handle (9) is then rotated 90° along the original direction so that the door catch (6) away from the inner panel (5) is separated from the outer frame (1) of the inspection door, and the door panel can be opened outwards.

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