Air volume measuring equipment for air handling unit

Abstract

The utility model discloses an air volume measuring device for an air handling unit, which comprises a shell in which an air inlet interface and an air outlet interface are arranged, a ventilation pipe which comprises a first slim pipe and a second slim pipe which are connected into a whole, the first slim pipe is communicated with the air inlet interface, the second slim pipe is communicated with the air outlet interface, and the first slim pipe and the second slim pipe are connected into a whole. The second thin tube is spiral; the two temperature sensors are used for detecting the temperature in the first thin tube; the heating element is used for heating airflow in the first thin tube, and the heating element is located between the two temperature sensors; the control unit is connected with the two temperature sensors and the heating element and used for calculating the air volume of the air conditioning box. The air conditioning box air volume measuring equipment can measure the air speed of the resistance element when an air conditioner runs at low air volume, and the measuring result is high in accuracy.

Description

Technical Field

[0001] The utility model relates to the technical field of wind speed and air volume measurement, in particular to an air volume measuring device for an air conditioning box. Background Art

[0002] The air conditioning box is assembled from the box body, air filter, surface cooling coil, heating coil, fan and other parts. In energy-saving control or higher-end air conditioning systems, inverters are often used to adjust the air volume of the air conditioning box.

[0003] In order to obtain the actual air volume of the air-conditioning box after frequency conversion, rotary flowmeters, hot wire anemometers, pitot tubes, etc. are often used to measure the wind speed and air volume at single or multi-points. However, due to the large windward area of ​​the air-conditioning box, the wind speed at each point varies, and the measurement results have large errors. At the same time, if the air-conditioning box is operating at low air volume, measurement will be more difficult, and higher accuracy of the measuring instrument will be required.

[0004] Therefore, there is a need for a device that can conveniently measure the wind speed and air volume of the air conditioning box. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides an air volume measuring device for an air conditioning box.

[0006] In order to achieve the above-mentioned purpose of the utility model, the technical solution adopted by the utility model is: an air volume measuring device for an air conditioner, comprising: a shell, wherein an air inlet interface and an air outlet interface are provided in the shell:

[0007] The ventilation pipe includes a first thin tube and a second thin tube connected as one body, wherein the first thin tube is connected to the air inlet interface, the second thin tube is connected to the air outlet interface, and the second thin tube is spiral-shaped;

[0008] two temperature sensors, for detecting the temperature inside the first capillary tube;

[0009] a heating element, used for heating the airflow in the first capillary tube, wherein the heating element is located between the two temperature sensors;

[0010] The control unit is connected to the two temperature sensors and the heating element respectively, and is used to calculate the air volume of the air conditioning box.

[0011] Furthermore, the temperatures measured by the two temperature sensors are T1 and T2 respectively, the inner cross-section of the first capillary tube is s, the heating power of the heating element is R1, the resistance coefficient of the air volume measuring device of the air conditioner is ζ1, and the resistance coefficient of the resistance element of the measured air conditioner is ζ2;

[0012] The control unit is controlled by the formula: Calculate the wind speed of the resistance element of the air conditioner under test.

[0013] Furthermore, the first capillary tube is a straight tube.

[0014] Furthermore, the air inlet interface, the air outlet interface and the ventilation pipe are all made of plastic with low thermal conductivity.

[0015] Furthermore, the shell is filled with heat-insulating material, and the heat-insulating material is filled in the air inlet interface, the air outlet interface and the periphery of the ventilation pipe.

[0016] Furthermore, internal threads are provided in the air inlet interface and the air outlet interface.

[0017] Furthermore, the control unit includes a single chip microcomputer, a display screen and a control circuit.

[0018] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0019] The air volume measuring device for an air conditioner box of the utility model can measure the wind speed of a resistance element when the air conditioner is running at a low air volume, and the measurement result has high accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, some of the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a structural diagram of an air volume measuring device for an air conditioning box according to the present utility model;

[0022] Figure 2 This is a state diagram of the utility model when the air volume measuring device of the power air conditioning box is being tested. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0025] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe the present invention and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0026] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0027] Furthermore, the terms "installed," "disposed," "provided with," "connected," "connected," and "socketed" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0028] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] Please refer to Figure 1 The utility model provides an air volume measuring device for an air conditioner, an air volume measuring device for an air conditioner, a housing 1, an air inlet interface 11 and an air outlet interface 12 are provided in the housing 1:

[0030] The ventilation pipe 2 includes a first capillary tube 21 and a second capillary tube 22 connected as one body, wherein the first capillary tube 21 is connected to the air inlet interface 11, and the second capillary tube 22 is connected to the air outlet interface 12, and the second capillary tube 22 is spiral-shaped;

[0031] Two temperature sensors 3, used to detect the temperature inside the first capillary tube 21;

[0032] a heating element 4 for heating the airflow in the first capillary tube 21 , wherein the heating element 4 is located between the two temperature sensors 3 ;

[0033] The control unit 5 is connected to the two temperature sensors 3 and the heating element 4 respectively, and is used to calculate the air volume of the air conditioning box.

[0034] Reference Figure 2 During measurement, the air inlet interface 11 and the air outlet interface 12 of the air volume measuring device of the air conditioning box are respectively connected to the front and rear sides of the resistance element of the air conditioning equipment. Under the action of the pressure difference, the air enters the ventilation pipe 2 from the air inlet interface 11, and flows out from the air outlet interface 12 after being heated by the heating element 4. Among them, the heating element 4 is provided with precise voltage and current by the control unit 5, thereby ensuring that the heating element 4 can provide fixed and accurate heating power to the airflow in the first capillary tube 21.

[0035] Furthermore, the temperatures measured by the two temperature sensors 3 are T1 and T2 respectively, the inner cross-section of the first capillary tube 21 is s, the heating power of the heating element 4 is R1, the resistance coefficient of the air flow measurement device of the air conditioner is ζ1, and the resistance coefficient of the resistance element of the air conditioner being measured is ζ2;

[0036] The control unit 5 uses the formula: Calculate the wind speed of the resistance element of the air conditioner under test.

[0037] Furthermore, the resistance coefficient ζ1 of the air volume measuring device for the air conditioner is related to the bending shape and number of turns of the second capillary 22. By changing the bending shape and / or number of turns of the second capillary 22, air volume measuring devices for the air conditioner with different resistance coefficients ζ1 can be manufactured. During the test, the resistance coefficient ζ1 of the air volume measuring device for the air conditioner can be selected according to the resistance coefficient ζ2 of the resistance element of the air conditioner, and the control unit 5 can output the appropriate heating power R1, so that the calculation formula A good gain is obtained to accurately obtain the wind speed of the measured air-conditioning resistance element, especially at low wind speeds, and a good measurement effect can be achieved.

[0038] Furthermore, the first capillary tube 21 is a straight tube.

[0039] Furthermore, the air inlet interface 11 , the air outlet interface 12 and the ventilation pipe 2 are all made of plastic with low thermal conductivity.

[0040] Furthermore, the shell 1 is filled with a heat insulating material 6 , and the heat insulating material 6 is filled around the air inlet port 11 , the air outlet port 12 and the periphery of the ventilation pipe 2 .

[0041] Furthermore, the air inlet interface 11 and the air outlet interface 12 are provided with internal threads.

[0042] Furthermore, the control unit 5 includes a single chip microcomputer, a display screen and a control circuit, and the wind speed calculated by the control unit 5 is displayed on the display screen.

[0043] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to the above embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein, but is intended to encompass the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An air volume measuring device for an air conditioning box, characterized in that: include: A housing (1) is provided with an air inlet interface (11) and an air outlet interface (12). The ventilation pipe (2) comprises a first thin tube (21) and a second thin tube (22) connected as one body, wherein the first thin tube (21) is in communication with the air inlet interface (11), and the second thin tube (22) is in communication with the air outlet interface (12), and the second thin tube (22) is spiral-shaped; Two temperature sensors (3) for detecting the temperature inside the first capillary tube (21); a heating element (4) for heating the airflow in the first capillary tube (21), wherein the heating element (4) is located between the two temperature sensors (3); The control unit (5) is connected to the two temperature sensors (3) and the heating element (4) respectively, and is used to calculate the air volume of the air conditioner.

2. The air volume measuring device for an air conditioner according to claim 1, characterized in that: The temperatures measured by the two temperature sensors (3) are T1 and T2 respectively, the inner cross-section of the first capillary tube (21) is s, the heating power of the heating element (4) is R1, the resistance coefficient of the air volume measuring device of the air conditioner is ζ1, and the resistance coefficient of the resistance element of the air conditioner being measured is ζ2; The control unit (5) is controlled by the formula: Calculate the wind speed of the resistance element of the air conditioner under test.

3. The air volume measuring device for an air conditioner according to claim 1, wherein: The first capillary tube (21) is a straight tube.

4. The air volume measuring device for an air conditioning box according to claim 1, characterized in that: The air inlet interface (11), the air outlet interface (12) and the ventilation pipe (2) are all made of plastic with low thermal conductivity.

5. The air volume measuring device for an air conditioning box according to claim 1, characterized in that: The shell (1) is filled with a heat-insulating material (6), and the heat-insulating material (6) is filled in the air inlet interface (11), the air outlet interface (12) and the periphery of the ventilation pipe (2).

6. The air volume measuring device for an air conditioning box according to claim 1, characterized in that: Internal threads are provided in the air inlet interface (11) and the air outlet interface (12).

7. The air volume measuring device for an air conditioning box according to claim 1, characterized in that: The control unit (5) comprises a single chip microcomputer, a display screen and a control circuit.

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