Air conditioning unit round section adjustable air volume measuring device

Abstract

This utility model discloses an adjustable air volume measuring device with a circular cross-section for air conditioning units, including a circular disc and a bracket for fixing the circular disc. A guide rail groove is provided on the end face of the circular disc, surrounding the end face of the circular disc. The end face of the circular disc near the guide rail groove is provided with scale lines for dividing the circumference of the circular disc into a preset number of equal division points. A guide rail that can move around the end face of the circular disc within the guide rail groove is inserted into the guide rail groove. The guide rail is provided with a groove, and a telescopic rod that can move within the groove and extend towards the center of the circular disc is installed in the groove. A knob for fixing the telescopic rod is installed on the side wall of the groove. The telescopic rod is provided with a waist-shaped hole for observing the scale lines for the equal division points. The telescopic rod is provided with a scale line for marking the length of the telescopic rod extending towards the center of the circular disc. The end of the telescopic rod is provided with a fixed position for fixing the Pitot tube measuring head to move towards the center of the circular disc to the air volume measuring point position.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning air volume measurement, and in particular to an adjustable air volume measuring device with a circular cross-section for air conditioning units. Background Technology

[0002] According to existing standards GB / T 7725-2022 Room Air Conditioners and GB / T 14294-2008 Modular Air Conditioning Units, the air volume of air conditioning units is mainly tested using two devices: pitot tubes and airflow nozzles. Since it is inconvenient to use airflow nozzles for measurement after the air conditioning unit is installed, Appendix B of GB / T 14294-2008 specifies that the on-site air volume test method for air conditioning units uses pitot tubes as the measuring device. However, during on-site testing, when measuring air volume at the air outlet cross-section, using a handheld pitot tube presents significant errors because the measuring head is far from the hand, making it impossible to ensure the measuring head is fixed at the air volume measurement point. Utility Model Content

[0003] The purpose of this invention is to provide an adjustable air volume measuring device with a circular cross-section for air conditioning units that can fix the measuring head of a handheld Pitot tube at the air volume measuring point, so as to reduce the error of the measurement data and ensure that the data of the on-site test meets the theoretical requirements of the standard.

[0004] The adjustable air volume measuring device with circular cross-section for air conditioning units of this utility model includes a circular disc and a bracket for fixing the circular disc. A guide rail groove is provided on the end face of the circular disc, surrounding the end face of the circular disc. The end face of the circular disc near the guide rail groove is provided with scale lines for dividing the circumference of the circular disc into a preset number of equal division points. A guide rail that can move around the end face of the circular disc within the guide rail groove is inserted into the guide rail groove. The guide rail is provided with a groove, and a telescopic rod that can move within the groove and extend towards the center of the circular disc is installed in the groove. A knob for fixing the telescopic rod is installed on the side wall of the groove. The telescopic rod is provided with a waist-shaped hole for observing the scale lines for the equal division points. The telescopic rod is provided with a scale line for marking the length of the telescopic rod extending towards the center of the circular disc. The end of the telescopic rod is provided with a fixed position for fixing the Pitot tube measuring head to move towards the center of the circular disc to the air volume measuring point position.

[0005] The adjustable air volume measuring device for a circular cross-section of an air conditioning unit described in this utility model involves fixing the Pitot tube measuring head to a fixed position, adjusting the guide rail to move within the guide rail slot, observing the scale line corresponding to the air volume measuring point position through the oblong hole on the telescopic rod, and then moving the telescopic rod towards the center of the circular disc within the slot to place the Pitot tube measuring head at the air volume measuring point position. The telescopic rod is then fixed by a knob. By sequentially adjusting the guide rail movement within the guide rail slot and moving the telescopic rod towards the center of the circular disc within the slot to the air volume measuring point position, multiple points can be measured and data recorded. Due to the fixed position on the telescopic rod... The Pitot tube measuring head can be fixed in place, and data can be recorded through the graduation lines at equal intervals and on the telescopic rod, thereby reducing measurement errors and ensuring that the data from on-site tests meet the theoretical requirements of the standard. Furthermore, after each measurement point, the telescopic rod is fixed by a knob to prevent the Pitot tube measuring head from shifting at the airflow measurement point, further reducing measurement errors and ensuring that the data from on-site tests meet the theoretical requirements of the standard. In addition, the graduation lines at the equal intervals corresponding to the moved airflow measurement point can be observed through the oblong hole on the telescopic rod, further improving the accuracy of the measurement data and thus reducing measurement errors.

[0006] As a preferred embodiment of this utility model, the division point scale lines include four division point scale lines and six division point scale lines.

[0007] As a preferred embodiment of this utility model, the guide rail slot is an inverted "T"-shaped guide rail slot, the guide rail is an inverted "T"-shaped guide rail, and the bottom of the "T"-shaped guide rail is provided with a rounded chamfer.

[0008] As a preferred embodiment of this utility model, the knob is provided with a threaded section that passes through the side wall of the slot and presses and fixes the telescopic rod inside the slot.

[0009] As a preferred embodiment of this utility model, two knobs are provided, located on both sides of the slot respectively.

[0010] As a preferred embodiment of this utility model, the scale lines are distributed from one end of the telescopic rod toward the center of the circular disc.

[0011] As a preferred embodiment of this utility model, the radius of the air outlet of the air conditioning unit measured by the telescopic rod through the scale line is 0~80cm.

[0012] As a preferred embodiment of this utility model, the length of the waist-shaped hole is 80cm.

[0013] As a preferred embodiment of this utility model, the bracket includes an upper support leg and a lower support leg. The upper support leg is a hollow tube, and one end of the lower support leg is retractably embedded in the hollow tube. A clamp is installed between the hollow tube and the lower support leg to fix one end of the lower support leg in the hollow tube. The upper end of the upper support leg is fixedly connected to the circular disc.

[0014] As a preferred embodiment of this utility model, the bottom of the lower support leg is equipped with an anti-slip foot cover. Attached Figure Description

[0015] Figure 1 This is a top view of the adjustable air volume measuring device with circular cross-section for air conditioning units according to this utility model;

[0016] Figure 2 This is another top view of the adjustable air volume measuring device with circular cross-section for air conditioning units according to this utility model;

[0017] Figure 3 This is a front view of the adjustable air volume measuring device with a circular cross-section for air conditioning units according to this utility model;

[0018] Figure 4 for Figure 1 Sectional view of the vertical section A in the middle;

[0019] Figure 5 A distribution map of measurements taken at the six division points;

[0020] Figure 6 A distribution map measured at the four division points. Detailed Implementation

[0021] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] In this utility model, it should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0023] An adjustable air volume measuring device with a circular cross-section for air conditioning units, such as Figure 1 - Figure 3The device includes a circular disc 1 and a bracket 2 for fixing the circular disc. A guide rail groove 3 is provided on the end face of the circular disc, which surrounds the end face of the circular disc. The end face of the circular disc near the guide rail groove is provided with equal division point scale lines 4 that divide the circumference of the circular disc into a preset number of equal parts. A guide rail 5 is inserted into the guide rail groove and can move around the end face of the circular disc within the guide rail groove. A groove 6 is provided on the guide rail. A telescopic rod 7 that can move within the groove and extend towards the center of the circular disc is installed in the groove. A knob 8 for fixing the telescopic rod is installed on the side wall of the groove. A waist-shaped hole 9 is provided on the telescopic rod for observing the equal division point scale lines. A scale line 10 is provided on the telescopic rod to mark the length of the telescopic rod extending towards the center of the circular disc. A fixing position 11 is provided at the end of the telescopic rod to fix the Pitot tube measuring head to move towards the center of the circular disc to the air volume measuring point position.

[0024] The fixing slot 11 can be set as a semi-circular fixing groove at the end of the telescopic rod, such as... Figure 1 As shown, the Pitot tube measuring head is secured by a semi-circular fixing slot and moved towards the center of the circular disc to the airflow measuring point. Alternatively, a circular fixing hole can be provided at the end of the telescopic rod. Figure 2 As shown, the Pitot tube measuring head is fixed by the circular fixing hole and moved towards the center of the circular disc to the air volume measuring point. At the measuring point, the measuring hole on the Pitot tube measuring head remains parallel to the air velocity direction of the air outlet of the air conditioning unit during the measurement process.

[0025] The graduation lines include quarter-division lines and hexa-division lines. By observing the hexa-division line corresponding to the airflow measurement point position through the oblong hole on the telescopic rod, adjusting the guide rail within the guide rail slot and moving the telescopic rod towards the center of the annular disk within the slot allows for measurement at multiple points divided into six equal parts. Figure 5 As shown. When observing the four division points corresponding to the airflow measurement point position through the oblong hole on the telescopic rod, adjusting the guide rail in the guide rail slot and moving the telescopic rod towards the center of the circular disc within the slot to the airflow measurement point position allows for measurement at multiple points divided into four equal parts. Figure 6 As shown.

[0026] like Figure 3 and Figure 4As shown, the bracket 2 includes an upper support leg 21 and a lower support leg 22. The upper support leg is a hollow tube, and its upper end is fixed to the outer wall of the circular disc with screws. The lower support leg is embedded in the hollow part at its lower end. The lower support leg can be adjusted up and down within the hollow tube to achieve a telescopic function, and is locked in place by screws on the clamp 23. The lower end of the upper support leg has a longitudinal groove, which deforms and presses the lower support leg inside the tube when the clamp is locked. By adjusting the telescopic movement of the lower support leg, the entire bracket can be adjusted so that the circular disc on the bracket can be raised to the air outlet of the air conditioning unit, making it easier to measure the wind speed. In addition, four upper support legs are provided, evenly distributed and fixed to the outer wall of the circular disc. Each upper support leg has a lower support leg installed below it, and each lower support leg has an anti-slip foot cover 24 installed at its bottom. The anti-slip foot cover is made of plastic and has a recessed groove from top to bottom. Glue is applied to the recessed groove before it is installed at the bottom of the lower support leg. In addition, each upper support leg is reinforced and fixed together by a crossbar. One end of the crossbar is fixedly connected to one of the upper support legs by a screw, and the other end is fixedly connected to the other upper support leg by a screw.

[0027] like Figure 4 As shown, the guide rail slot is an inverted "T" shaped guide rail slot, and the guide rail is an inverted "T" shaped guide rail. The inverted "T" shaped guide rail can be effectively locked in the inverted "T" shaped guide rail slot to prevent the guide rail from falling off during movement. In addition, the bottom of the "T" shaped guide rail is provided with an arc chamfer, so that the guide rail can move better in the guide rail slot. The inside of the guide rail slot can also be set as a semi-circular guide rail slot, and the bottom of the guide rail is set as a semi-circular bottom, so that it can move in the semi-circular guide rail slot.

[0028] The telescopic rod is 85cm long. The oblong hole is located in the middle of the telescopic rod, running 80cm from one end to the other. The scale lines are located on both sides of the oblong hole, distributed from one end of the rod towards the center of the circular disc. The starting scale line is 0cm, and the ending scale line is 80cm. By passing the telescopic rod through the scale lines, the radius of the air conditioner unit's air outlet can be measured within the range of 0-80cm.

[0029] The knob has a threaded section that passes through the side wall of the slot to press and fix the telescopic rod. By screwing the threaded section into the slot, the telescopic rod can be pressed and fixed. When the threaded section is screwed out, the telescopic rod is released, allowing it to move towards the center of the annular disc to the airflow measurement point. In addition, there are two knobs, one on each side of the slot, which makes it easier to adjust and fix the telescopic rod.

[0030] The above embodiments are only used to illustrate the detailed solution of this utility model. This utility model is not limited to the above detailed solution, that is, it does not mean that this utility model must rely on the above detailed solution to be implemented. Those skilled in the art should understand that any improvement to this utility model, equivalent substitution of the raw materials of this utility model product, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of this utility model.

Claims

1. A circular cross-section adjustable airflow measuring device for air conditioning units, characterized in that, The device includes a circular disc (1) and a bracket (2) for fixing the circular disc. A guide rail groove (3) is provided on the end face of the circular disc, which surrounds the end face of the circular disc. The end face of the circular disc near the guide rail groove is provided with a scale line (4) that divides the circumference of the circular disc into a preset number of equal parts. A guide rail (5) that can move around the end face of the circular disc is inserted into the guide rail groove. A groove (6) is provided on the guide rail. A telescopic rod (7) that can move in the groove and extend toward the center of the circular disc is installed in the groove. A knob (8) for fixing the telescopic rod is installed on the side wall of the groove. A waist-shaped hole (9) is provided on the telescopic rod, which allows observation of the scale line of the equal parts. A scale line (10) is provided on the telescopic rod to mark the length of the telescopic rod extending toward the center of the circular disc. A fixed position (11) is provided at the end of the telescopic rod to fix the Pitot tube measuring head to move toward the center of the circular disc to the position of the air volume measuring point.

2. The adjustable air volume measuring device with circular cross-section for air conditioning units according to claim 1, characterized in that, The division point scale lines include the quarter division point scale lines and the sixth division point scale lines.

3. The adjustable air volume measuring device with circular cross-section for air conditioning units according to claim 1, characterized in that, The guide rail slot is an inverted "T" shaped guide rail slot, and the guide rail is an inverted "T" shaped guide rail with a rounded chamfer at the bottom.

4. The adjustable air volume measuring device with circular cross-section for air conditioning units according to claim 1, characterized in that, The knob has a threaded section that goes through the side wall of the slot to press and fix the telescopic rod inside the slot.

5. The adjustable air volume measuring device with circular cross-section for air conditioning units according to claim 4, characterized in that, There are two knobs, located on either side of the card slot.

6. The adjustable air volume measuring device with circular cross-section for air conditioning units according to claim 1, characterized in that, The scale lines are distributed from one end of the telescopic rod toward the other end of the circular disc towards the center.

7. The adjustable air volume measuring device with circular cross-section for air conditioning units according to claim 6, characterized in that, The radius of the air outlet of the air conditioning unit can be measured from 0 to 80 cm by using the telescopic rod through the scale lines.

8. The adjustable air volume measuring device with circular cross-section for air conditioning units according to claim 7, characterized in that, The length of the waist-shaped hole is 80cm.

9. The adjustable air volume measuring device with circular cross-section for air conditioning units according to claim 1, characterized in that, The bracket (2) includes an upper support leg (21) and a lower support leg (22). The upper support leg is a hollow tube, and one end of the lower support leg can be retractably embedded in the hollow tube. A clamp (23) is installed between the hollow tube and the lower support leg to fix one end of the lower support leg in the hollow tube. The upper end of the upper support leg is fixedly connected to the circular disc.

10. The adjustable air volume measuring device with circular cross-section for air conditioning units according to claim 9, characterized in that, The bottom of the lower support leg is equipped with anti-slip foot covers (24).

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