Automatic balancing device for indoor and outdoor pressure difference

Abstract

The technical scheme of the utility model discloses an automatic balancing device for indoor and outdoor pressure difference. The automatic balancing device comprises louvre blades, blade shafts, connecting rods, driving rods, driving rod fixing seats, springs, spring compression nuts and an outer frame, the upper ends of the louvre blades are hinged to the connecting rods, the middles of the louvre blades are rotatably connected with the blade shafts, the two ends of each blade shaft are installed on the outer frame, the upper sides and the lower sides of the driving rods are connected with the connecting rods through the connecting blocks, the middles of the driving rods are fixed to the outer frame through the driving rod fixing bases, and one side of each driving rod is provided with a right-hand thread structure while the other side of each driving rod is provided with a left-hand thread structure. The two springs are arranged on the outer side of the driving rod in a sleeving mode and arranged on the upper side and the lower side of the driving rod fixing base respectively, one end of each spring is connected with the corresponding spring pressing nut, the other end of each spring is connected with the corresponding connecting block, and the spring pressing nuts are installed on the right-hand thread structure and the left-hand thread structure, so that under the condition that the indoor and outdoor pressure difference is small, the louver blades are in a closed state; when the pressure difference is large, the louvre blades are opened, and the indoor and outdoor pressure difference is automatically balanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of ventilation devices, and in particular relates to an automatic balancing device for indoor and outdoor pressure differences. Background Art

[0002] With the continuous improvement of the requirements for energy saving in building design, the airtightness of doors and windows in building construction is also being improved. Houses have achieved good insulation and airtightness, and have also set up a complete exhaust system, but the pressure difference balance between indoor and outdoor is less considered. Especially in winter for heating and summer for cooling, most rooms are in a state of closed doors and windows, and there is no place for air intake in the entire space. Once the doors and windows are opened, the room will not be insulated. According to the "Range Hood GB / T 17713", the air volume of the range hood should be ≥m3 / min and the air pressure should be ≥100Pa; according to the "Design Code for Heating, Ventilation and Air Conditioning of Civil Buildings GB 50736", the frequency of comprehensive ventilation of kitchens and bathrooms should not be less than 3 times / h. After the doors and windows are closed, there is no source of fresh air in the room. Finally, under the action of the high-suction range hood and the high-suction exhaust fan, the gas from the exhaust pipe of the toilet or kitchen is drawn into the room through the exhaust pipe with a poor check valve and the sewage pipe with poor water seal effect, which not only causes serious odor in the room, but also poses a serious risk of cross-infection of infectious diseases through the exhaust system. In addition, the negative pressure caused by the closing of doors and windows also causes serious secondary damage to the doors and windows of the room. For the 3*2.5m floor-to-ceiling doors and windows, when the negative pressure in the room reaches 300Pa, a lateral thrust of 2225N can be generated.

[0003] Patent CN106567780 A discloses an automatic opening device for the ventilation opening of a box-type generator set. The cylinder of the temperature control power device has a cap at the bottom and a base plate at the top. A travel rod with an inverted T-shaped longitudinal section is installed in the cylinder. The travel rod divides the cylinder into a travel chamber and a temperature-sensitive medium chamber. The reset spring is sleeved on the travel rod located in the travel chamber. The top of the travel rod passes through the upper cover plate and is fixed with a connecting plate. The connecting plate has a U-shaped groove. The rolling shaft on the drive rod moves in the U-shaped groove of the connecting plate. The drive rod is installed on the shutter. The shutter frame is fixed on the mounting seat. The mounting seat is fixed on the base plate. The temperature-sensitive medium chamber is filled with a temperature-sensitive medium. When the temperature is ≥50°C, the temperature-sensitive medium paraffin will push the travel rod to move upward, and the travel rod drives the drive rod to move, gradually opening the shutter. However, the shutter switch cannot be adjusted according to the pressure difference between the inside and outside of the shutter. The shutter can only be closed by controlling the travel rod. Therefore, it is necessary to develop an automatic balancing device for the indoor and outdoor pressure difference that can automatically adjust the shutter switch according to the indoor and outdoor pressure difference. Utility Model Content

[0004] In order to solve the existing technical problems, the utility model provides an automatic balancing device for indoor and outdoor pressure differences. Through the cooperation of louvers, connecting rods and springs, when the indoor and outdoor pressure difference is insufficient or small, the louvers are in a closed state, and when the pressure difference is large, the louvers are in an open state, thereby automatically balancing the indoor and outdoor pressure difference.

[0005] The technical solution of the utility model is: an automatic balancing device for indoor and outdoor pressure difference, comprising a louver, a blade shaft, a connecting rod, a driving rod, a driving rod fixing seat, a spring, a spring clamping nut and an outer frame; the louver is arranged inside the outer frame, the upper end of the louver is hinged to the connecting rod, the middle part of the louver is rotatably connected to the blade shaft, both ends of the blade shaft are installed on the outer frame, the upper and lower sides of the driving rod are connected to the connecting rod through a connecting block, the driving rod and the connecting rod extend in the up and down directions, the middle part of the driving rod is fixed to the outer frame through the driving rod fixing seat, a positive wire structure is arranged on one side of the driving rod, and a negative wire structure is arranged on the other side, the spring sleeve is arranged on the outside of the driving rod, there are 2 springs in total, which are respectively arranged on the upper and lower sides of the driving rod fixing seat, one end of the spring is connected to the spring clamping nut, and the other end is connected to the connecting block, and the spring clamping nut is installed on the positive wire structure and the negative wire structure.

[0006] Furthermore, a turbine structure is arranged in the middle of the driving rod, an adjusting worm bolt is installed on the driving rod fixing seat, and the inner end of the adjusting worm bolt passes through the driving rod fixing seat and is connected to the turbine structure of the driving rod.

[0007] Further, the driving rod fixing seat is fixed to the side wall of the outer frame by fixing seat mounting bolts. Further, a spring thrust washer is arranged between the spring and the connecting block, the spring compression nut is arranged on the inner side of the spring, and the spring thrust washer is arranged on the outer side of the spring.

[0008] Furthermore, guide rails are installed on the upper and lower sides of the drive rod fixing seat, and the guide rails are adapted to the spring clamping nut. The guide rails position the spring clamping nut so that the spring clamping nut cannot rotate. When the drive rod rotates, the spring clamping nut moves up and down along the positive wire structure and the negative wire structure of the drive rod.

[0009] Furthermore, the guide rail is L-shaped, and the inner wall of the guide rail is in contact with the outer wall of the spring compression nut.

[0010] Furthermore, there are two spring clamping nuts, one is a left-handed nut and the other is a right-handed nut. The spring clamping nuts are adapted to the positive wire structure and the negative wire structure. When the driving rod rotates, the two spring clamping nuts are driven to move in opposite directions synchronously through the positive wire structure and the negative wire structure.

[0011] Furthermore, a dust collecting filter is arranged on the outer side of the louver blades, the dust collecting filter is installed in a dust collecting filter frame, and the dust collecting filter frame is fixed on the outer frame.

[0012] Furthermore, the louver comprises a blade body and a rotating arm, the rotating arm is fixed to the upper end of the blade body, the outer end of the rotating arm is connected to the connecting rod, and the connection between the rotating arm and the blade body is connected to the blade shaft.

[0013] Furthermore, fixing buckles are installed at the upper and lower ends of the outer frame, and fixing buckle bolts are installed on the fixing buckles, and the outer frame is fixed to the installation carrier through the fixing buckles and the fixing buckle bolts.

[0014] The working principle of the automatic balancing device for indoor and outdoor pressure difference of the utility model is as follows: when the indoor pressure is lower than or higher than the outdoor pressure, the pressure is transmitted to the connecting rod through the louver, and then the force is transmitted to the spring through the connecting block. When the force transmitted to the spring by the louver through the connecting rod and the connecting block is greater than the preload force of the spring, the louver rotates at an angle to open the louver. The greater the indoor and outdoor pressure difference, the greater the angle at which the louver opens. The indoor and outdoor pressure difference is quickly balanced through the ventilation effect of the opened louver. The rotation of the driving rod is realized by rotating the adjusting worm bolt and cooperating with the turbine structure in the middle of the driving rod. Under the action of the positive thread and the negative thread structure, the two spring compression nuts are driven to move synchronously in opposite directions, and the preload forces of the two springs are synchronously adjusted.

[0015] By adopting the above technical solution, the beneficial effects achieved by the utility model are as follows:

[0016] (1) The utility model realizes that when the pressure difference between indoor and outdoor is insufficient or small, the louvers are in a closed state by means of the coordination of the louvers, connecting rods and springs, and by means of the preload of the springs, the louvers are in a closed state, thereby effectively isolating the air inside and outside, and achieving the effects of heat preservation and energy saving. When the pressure difference is large, the louvers are in an open state, and the greater the pressure difference, the greater the opening angle of the louvers, thereby automatically balancing the pressure difference between indoor and outdoor, avoiding problems caused by unbalanced pressure difference between indoor and outdoor, and reducing damage to doors and windows of the house caused by the lateral pressure caused by the pressure difference.

[0017] (2) The preload force of the spring is used to automatically adjust the pressure difference between indoor and outdoor spaces. The spring preload force is adjusted by rotating the worm bolt left and right. The spring preload force corresponds to the pressure difference between indoor and outdoor spaces when the shutters are opened. The adjustment method is simple and can be adjusted according to the actual use of the house.

[0018] (3) The dust collection filter element is used to isolate outdoor pollutants, ensuring clean ventilation and isolating polluted air even in an environment with severe air pollution.

[0019] (4) The equipment is easy to install and the dust filter element is easy to replace. Filter elements with different functions can be configured as needed to achieve maximum adaptability to the use environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 It is a structural schematic diagram of the connecting rod and shutter blades of the utility model;

[0022] Figure 3 It is a structural schematic diagram of the shutter blades of the utility model in a closed state;

[0023] Figure 4 This is a schematic diagram of the structure of the utility model in which the shutter blades are opened inwards;

[0024] Figure 5 This is a schematic diagram of the structure of the louver blades of the utility model opening outwards;

[0025] Figure 6 It is a schematic diagram of the structure of the spring and the driving rod of the utility model;

[0026] Figure 7 It is a structural schematic diagram of the louver blades of the utility model;

[0027] Figure 8 It is a schematic diagram of the installation structure of the utility model.

[0028] In the figure, the louver 1, the blade shaft 2, the connecting rod 3, the driving rod 4, the driving rod fixing seat 5, the spring 6, the outer frame 7, the connecting block 8, the adjusting worm bolt 9, the fixing seat mounting bolt 10, the spring thrust washer 11, the guide rail 12, the dust filter element 13, the dust filter element frame 14, the blade body 15, the rotating arm 16, the fixing buckle 17, the fixing buckle bolt 18, and the spring clamping nut 19. DETAILED DESCRIPTION

[0029] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0030] Example 1

[0031] Reference Figure 1-8In the invention, an automatic balancing device for indoor and outdoor pressure difference comprises a louver blade 1, a blade shaft 2, a connecting rod 3, a driving rod 4, a driving rod fixing seat 5, a spring 6, a spring clamping nut 19 and an outer frame 7; the louver blade 1 is arranged inside the outer frame 7, the upper end of the louver blade 1 is hinged with the connecting rod 3, the middle part of the louver blade 1 is rotatably connected with the blade shaft 2, and both ends of the blade shaft 2 are mounted on the outer frame 7, the upper and lower sides of the driving rod 4 are connected with the connecting rod 3 through a connecting block 8, the driving rod 4 and the connecting rod 3 extend in the up and down directions, the middle part of the driving rod 4 is fixed to the outer frame 7 through a driving rod fixing seat 5, a positive wire structure is arranged on one side of the driving rod 4, and a negative wire structure is arranged on the other side, the spring 6 is sleeved on the outside of the driving rod 4, there are 2 springs 6, which are respectively arranged on the upper and lower sides of the driving rod fixing seat 5, one end of the spring 6 is connected with the spring clamping nut 19, and the other end is connected with the connecting block 8, and the spring clamping nut 19 is mounted on the positive wire structure and the negative wire structure.

[0032] The outer frame 7 is used to support the entire device, so that the entire device can be fixed to a mounting carrier such as a window or a wall to achieve the function of balancing the indoor and outdoor air pressure. The blade shaft 2 is used to position the louver 1 so that the louver 1 can rotate around the blade shaft 2. The louver 1 is driven by the indoor and outdoor pressure difference and changes the rotation angle synchronously. When the indoor and outdoor pressure difference is insufficient, the louver 1 is distributed in the up and down direction, and the adjacent louver 1 contacts each other to isolate the indoor and outdoor air circulation. When the louver 1 rotates, a gap is formed between the adjacent louver 1 to achieve exhaust and ventilation. The connecting rod 3 is hinged with each louver 1 to maintain the uniform angle of all louver 1. When the louver 1 is driven by the indoor and outdoor pressure difference and rotates passively, the force will be transmitted to the connecting rod 3, and the connecting rod 3 maintains a relatively balanced state under the preload of the spring 6. When the indoor and outdoor pressure difference reaches a certain value, the force transmitted to the spring 6 through the louver 1 and the connecting rod 3 is greater than the preload of the spring 6, the spring 6 is deformed, and the louver 1 rotates to achieve automatic ventilation and balance the indoor and outdoor pressure difference.

[0033] Furthermore, a turbine structure is arranged in the middle of the driving rod 4 , an adjusting worm bolt 9 is installed on the driving rod fixing seat 5 , and the inner end of the adjusting worm bolt 9 passes through the driving rod fixing seat 5 and is connected to the turbine structure of the driving rod 4 .

[0034] Furthermore, the driving rod fixing seat 5 is fixed to the side wall of the outer frame 7 by the fixing seat mounting bolts 10. The driving rod fixing seat 5 is used to fix the driving rod 4, and by adjusting the worm bolt 9 and the worm gear structure, the driving rod 4 is rotated, thereby realizing the rotation of the positive wire structure and the reverse wire structure, thereby pushing the spring compression nut 19 to move, and then realizing the adjustment of the preload force of the spring 6.

[0035] Furthermore, a spring thrust washer 11 is arranged between the spring 6 and the connecting block 8, the spring compression nut 19 is arranged on the inner side of the spring 6, and the spring thrust washer 11 is arranged on the outer side of the spring 6. The spring thrust washer 11 is used to fix one end of the spring 6, and effectively transmit the elastic force of the spring 6 to the connecting block 8, and then to the connecting rod 3.

[0036] Furthermore, guide rails 12 are installed on the upper and lower sides of the driving rod fixing seat 5, and the guide rails 12 are adapted to the spring clamping nut 19. The guide rails 12 position the spring clamping nut 19 so that the spring clamping nut 19 cannot rotate. When the driving rod 4 rotates, the spring clamping nut 19 moves up and down along the positive wire structure and the negative wire structure of the driving rod 4.

[0037] Furthermore, the guide rail 12 is L-shaped, and the inner wall of the guide rail 12 is in contact with the outer wall of the spring compression nut 19 .

[0038] Furthermore, there are two spring compression nuts 19, one is a left-handed nut and the other is a right-handed nut. The spring compression nuts 19 are adapted to the positive thread structure and the reverse thread structure. When the drive rod 4 rotates, the two spring compression nuts 19 are driven to move synchronously in opposite directions through the positive thread structure and the reverse thread structure. The two spring compression nuts 19 are matched with the positive thread structure and the reverse thread structure. When the drive rod 4 rotates, the two spring compression nuts 19 realize reverse synchronous movement, effectively avoiding deviation of the preload force of the two springs 6.

[0039] Furthermore, a dust filter 13 is arranged outside the louver 1, and the dust filter 13 is installed in a dust filter frame 14, and the dust filter frame 14 is fixed on the outer frame 7. The dust filter 13 is installed through the dust filter frame 14, and the dust filter 13 is used to filter the incoming and outgoing air. The filter material of the filter can be adjusted according to the use environment, or functional adsorption materials can be added to achieve the purpose of air purification.

[0040] Furthermore, the shutter blade 1 includes a blade body 15 and a rotating arm 16, the rotating arm 16 is fixed to the upper end of the blade body 15, the outer end of the rotating arm 16 is connected to the connecting rod 3, and the connection between the rotating arm 16 and the blade body 15 is connected to the blade shaft 2. One end of the blade body 15 is a free end, and the other end is hinged to the connecting rod 3 through the rotating arm 16, and the rotating arm 16 has an angle with the central plane of the shutter blade 1.

[0041] There are 8 louvers 1 in total, which are evenly distributed along the direction of the connecting rod 3, and the directions of the louvers 1 are consistent.

[0042] Furthermore, fixing buckles 17 are installed at the upper and lower ends of the outer frame 7, and fixing buckle bolts 18 are installed on the fixing buckles 17. The outer frame 7 is fixed to the installation carrier by the fixing buckles 17 and the fixing buckle bolts 18, for example, the outer frame 7 is fixed to a window, a wall or other partitions. During installation, a mounting hole is first opened on the installation carrier, the size of the mounting hole is larger than the size of the outer frame 7, and the outer frame 7 is passed through the mounting hole, fixed by the fixing buckles 17, and locked by the fixing buckle bolts 18.

[0043] The working principle of the automatic balancing device for indoor and outdoor pressure difference of the utility model is as follows: when the indoor pressure is lower than or higher than the outdoor pressure, the pressure is transmitted to the connecting rod 3 through the louver 1, and then the force is transmitted to the spring 6 through the connecting block 8. When the force transmitted to the spring 6 by the louver 1 through the connecting rod 3 and the connecting block 8 is greater than the preload force of the spring 6, the louver 1 rotates at an angle to open the louver 1. The greater the indoor and outdoor pressure difference, the greater the angle at which the louver 1 opens. The indoor and outdoor pressure difference is quickly balanced by the ventilation effect of the opened louver 1. The louver 1 can be opened inward or outward. The rotation of the drive rod 4 is realized by rotating the adjusting worm bolt 9 and cooperating with the turbine structure in the middle of the drive rod 4. Under the action of the positive thread and the negative thread structure, the two spring clamping nuts 19 are driven to move synchronously in opposite directions to synchronously adjust the preload force of the two springs 6.

Claims

1. An automatic balancing device for indoor and outdoor pressure difference, characterized in that: The invention comprises a shutter blade (1), a blade shaft (2), a connecting rod (3), a driving rod (4), a driving rod fixing seat (5), a spring (6), a spring clamping nut (19) and an outer frame (7); the shutter blade (1) is arranged inside the outer frame (7); the upper end of the shutter blade (1) is hinged to the connecting rod (3); the middle part of the shutter blade (1) is rotatably connected to the blade shaft (2); both ends of the blade shaft (2) are mounted on the outer frame (7); the upper side and the lower side of the driving rod (4) are connected to the connecting rod (3) through a connecting block (8); the driving rod (4) is ) and the connecting rod (3) extend in the up-down direction, the middle part of the driving rod (4) is fixed on the outer frame (7) through the driving rod fixing seat (5), one side of the driving rod (4) is provided with a positive wire structure, and the other side is provided with a negative wire structure, the spring (6) is sleeved on the outer side of the driving rod (4), there are two springs (6), which are respectively arranged on the upper side and the lower side of the driving rod fixing seat (5), one end of the spring (6) is connected to the spring clamping nut (19), and the other end is connected to the connecting block (8), and the spring clamping nut (19) is installed on the positive wire structure and the negative wire structure.

2. The automatic balancing device for indoor and outdoor pressure difference according to claim 1, characterized in that: A turbine structure is arranged in the middle of the driving rod (4), an adjusting worm bolt (9) is installed on the driving rod fixing seat (5), and the inner end of the adjusting worm bolt (9) passes through the driving rod fixing seat (5) and is connected to the turbine structure of the driving rod (4).

3. An automatic balancing device for indoor and outdoor pressure difference according to claim 1 or 2, characterized in that: The driving rod fixing seat (5) is fixed on the side wall of the outer frame (7) by means of fixing seat mounting bolts (10).

4. The automatic balancing device for indoor and outdoor pressure difference according to claim 1, characterized in that: A spring thrust washer (11) is arranged between the spring (6) and the connecting block (8), a spring clamping nut (19) is arranged on the inner side of the spring (6), and the spring thrust washer (11) is arranged on the outer side of the spring (6).

5. The automatic balancing device for indoor and outdoor pressure difference according to claim 1, characterized in that: Guide rails (12) are installed on the upper and lower sides of the driving rod fixing seat (5). The guide rails (12) are adapted to the spring clamping nut (19). The guide rails (12) position the spring clamping nut (19) so that the spring clamping nut (19) cannot rotate. When the driving rod (4) rotates, the spring clamping nut (19) moves in the up and down directions along the positive wire structure and the negative wire structure of the driving rod (4).

6. The automatic balancing device for indoor and outdoor pressure difference according to claim 5, characterized in that: The guide rail (12) is L-shaped, and the inner wall of the guide rail (12) is in contact with the outer wall of the spring compression nut (19).

7. The automatic balancing device for indoor and outdoor pressure difference according to claim 1, characterized in that: There are two spring clamping nuts (19), one is a left-handed nut and the other is a right-handed nut. The spring clamping nuts (19) are compatible with the positive thread structure and the reverse thread structure. When the driving rod (4) rotates, the two spring clamping nuts (19) are driven to move synchronously in opposite directions through the positive thread structure and the reverse thread structure.

8. The automatic balancing device for indoor and outdoor pressure difference according to claim 1, characterized in that: A dust collecting filter (13) is arranged on the outer side of the louver blade (1), and the dust collecting filter (13) is installed in a dust collecting filter frame (14), and the dust collecting filter frame (14) is fixed on the outer frame (7).

9. The automatic balancing device for indoor and outdoor pressure difference according to claim 1, characterized in that: The shutter blade (1) comprises a blade body (15) and a rotating arm (16), wherein the rotating arm (16) is fixed to the upper end of the blade body (15), the outer end of the rotating arm (16) is connected to the connecting rod (3), and the connection between the rotating arm (16) and the blade body (15) is connected to the blade shaft (2).

10. An automatic balancing device for indoor and outdoor pressure difference according to claim 1 or 8, characterized in that: The upper and lower ends of the outer frame (7) are provided with fixing buckles (17), and fixing buckle bolts (18) are installed on the fixing buckles (17). The outer frame (7) is fixed to the installation carrier by the fixing buckles (17) and the fixing buckle bolts (18).

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