Flow blocking measuring instrument for capillary manifold of multi-channel condenser

Abstract

The invention discloses a flow blocking measuring instrument for a capillary manifold of a multi-channel condenser, and belongs to the technical field of air tightness detection. Comprising an air supply assembly connected with any channel of a workpiece to be detected, and a plurality of detection assemblies connected with other channels respectively, the air supply assembly comprises an air supply source, a pressure reducing valve, an air inlet valve and a total flow meter which are arranged in sequence; the tail end of the total flow meter is connected to a channel through a hose; the detection assembly comprises branch flow meters connected with other channels. The gas supply assembly and the detection assembly are arranged, the flow of each channel is accurately measured, the abnormal state can be accurately recognized, and blockage analysis is carried out; a pressure reducing valve is matched with a pressure sensor to accurately regulate and control the pressure and flow velocity of input gas; and an expansion assembly is arranged to enhance the detection function.

Description

Technical Field

[0001] The invention relates to the technical field of airtightness detection, and in particular to a multi-channel condenser capillary manifold flow blockage measuring instrument. Background Art

[0002] As a key condenser component, the multi-channel condenser capillary manifold is widely used in various refrigeration and heat dissipation systems. Its structural feature is that multiple branch pipes are set on a main pipe to form a multi-channel system. During the assembly process of the condenser and the subsequent maintenance stage, ensuring that the flow of each branch pipe channel is normal and unblocked is an important prerequisite for ensuring the efficient and stable operation of the entire condenser and even the entire system.

[0003] At present, the common detection method in the industry is: select one of the capillary manifolds of the multi-channel condenser as channel one, connect it to the external gas source to realize the gas supply function; connect the remaining channels to the air pipes respectively, and immerse the other end of the air pipes in water, and rely on the operator's naked eye to observe whether there are bubbles escaping from each air pipe port. If bubbles are generated, it is determined that the corresponding channel can achieve gas circulation, that is, the channel is deemed qualified. However, this detection method that relies on manual vision has inherent defects. On the one hand, long-term visual observation can easily cause fatigue to the operator, resulting in frequent missed detection; on the other hand, when there is only partial blockage in the channel, the airflow can still pass through the narrow blockage under a certain pressure and form bubbles in the water. In this way, the existing detection methods cannot accurately identify this kind of partially blocked hidden danger condition. But in fact, even if it is only partially blocked, it will have a great negative impact on the actual working performance of the condenser, such as reducing refrigeration efficiency, increasing energy consumption and even shortening the service life of the equipment.

[0004] In view of the above problems, the applicant combined the experience of airtight detection in multiple fields and designed a flow blockage measuring instrument for the capillary manifold of a multi-channel condenser, so as to better apply it to complex and changeable detection environments and provide strong technical support for timely and accurate detection of various abnormal conditions of the capillary manifold. Summary of the invention

[0005] The purpose of the present invention is to solve the above problems in the prior art and to propose a multi-channel condenser capillary manifold flow blockage measuring instrument.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A multi-channel condenser capillary manifold flow blockage detection instrument comprises: an air supply component connected to any channel of a workpiece to be detected, and a plurality of detection components respectively connected to other channels; The air supply assembly comprises: an air supply source, a pressure reducing valve, an air inlet valve, and a total flow meter which are arranged in sequence; the tail end of the total flow meter is connected to a channel through a hose; The detection component includes: a sub-flow meter connected to other channels.

[0007] In some embodiments, the air delivery assembly further includes: a pressure sensor and an inlet temperature sensor disposed at the tail end of the air inlet valve; The detection component also includes an outlet temperature sensor arranged at the front end of the sub-flow meter.

[0008] In some embodiments, the detection component is connected to the channel of the workpiece to be tested through a three-way pipe; one way of the three-way pipe is connected to the channel of the workpiece to be tested, one way is connected to the detection component, and the other way is connected to the expansion component; each way of the three-way pipe is provided with an opening and closing valve.

[0009] In some embodiments, it further comprises: an industrial computer; the air supply component and the detection component are both communicatively connected to the industrial computer, and are adjusted and controlled by the industrial computer; The industrial computer is provided with a flow analysis module; the flow analysis module analyzes whether there is a leakage by comparing the total flow meter with the sum of each sub-flow meter; the flow analysis module analyzes whether there is an abnormality in any channel by comparing the difference between each sub-flow meter.

[0010] In some embodiments, the flow analysis module is further provided with: a temperature compensation algorithm; by detecting the temperature and flow data collected in the environment, the flow data at a specific working temperature is calculated.

[0011] In some embodiments, it also includes: a code scanning component; the code scanning component is connected to the industrial computer for communication; the model of the workpiece is identified by reading the QR code of the workpiece to be measured, and the corresponding template is automatically retrieved and the relevant parameters are loaded.

[0012] In some embodiments, the air supply assembly and the detection assembly are installed via a bracket assembly; The support assembly includes: a base plate, a clamping plate fixed on the base plate and supporting the air supply assembly, and a support placed on the base plate and supporting the detection assembly.

[0013] In some embodiments, an open card slot is provided at the top of the card plate, and inwardly folded elastic members are provided on both sides of the card slot; The elastic member is composed of a semicircular spring piece and a flat plate with the end of the semicircular spring piece folded inward; the connection between the semicircular spring piece and the flat plate is set as an arc angle.

[0014] In some embodiments, a notch is provided below the slot, and a pressing screw with a threaded connection is provided through the notch upward.

[0015] In some embodiments, the support includes: a bayonet with a top opening, a support rod connected to the lower end of the bayonet, and a base arranged at the lower end of the support rod.

[0016] Compared with the prior art, the present invention provides a multi-channel condenser capillary manifold flow blockage measuring instrument, which has the following beneficial effects.

[0017] 1. The present invention is provided with a gas supply component and a detection component. By accurately measuring the flow of each channel, the abnormal state can be accurately identified and a blockage analysis can be performed. A pressure reducing valve is provided in conjunction with a pressure sensor to accurately control the pressure and flow rate of the input gas. An expansion component is provided to enhance the detection function.

[0018] 2. The present invention is installed through a bracket assembly, is flexible to use, and is adaptable to different types of workpieces to be tested; a junction box is provided to collect the wiring of each detection component and connect it to an industrial computer, which is more neat and reliable; a workpiece in place sensor is provided to detect whether there is a workpiece placed above, and a trigger can be provided to start the air supply component.

[0019] Other advantages, objectives and features of the present invention will be described in part in the following description; and in part, will be apparent to those skilled in the art based on an examination of the following; or, may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The module structure of the present invention is shown in FIG. Figure 1 .

[0021] Figure 2 The module structure of the present invention is shown in FIG. Figure 2 .

[0022] Figure 3 It is a schematic diagram of the use state of the present invention.

[0023] Figure 4 It is a structural schematic diagram of the present invention.

[0024] Figure 5 It is a schematic diagram of the top structure of the present invention.

[0025] Figure 6 It is a partial structural schematic diagram of the present invention.

[0026] Figure 7 This is a schematic diagram of the status of the pallet and support.

[0027] Figure 8 This is a schematic diagram of the structure of the card board.

[0028] Fig. 9 It is a schematic diagram of the side structure of the pallet.

[0029] Fig.10 This is a schematic diagram of the support in use.

[0030] Fig.11 This is the front view of the support in use.

[0031] Fig.12 This is the lower side view of the support in use.

[0032] Fig.13 This is a schematic diagram of the support structure.

[0033] Fig.14 This is a schematic diagram of the lower structure of the support.

[0034] Fig.15 This is a schematic diagram of the structural frame.

[0035] Fig.16 Schematic diagram of the detection process.

[0036] In the figure: 1. Base plate; 2. Card plate; 21. Card slot; 22. Elastic member; 23. Pressing screw; 3. Support; 31. Bayonet; 32. Support rod; 33. Base; 4. Junction box. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below 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, rather than all the embodiments.

[0038] Reference Figure 1-16 A multi-channel condenser capillary manifold flow blockage measuring instrument comprises: an air supply component connected to any channel of a workpiece to be measured, and a plurality of detection components respectively connected to other channels.

[0039] Generally, the channel closest to the edge is used as channel one, connected to the gas supply component, and gas with appropriate pressure and flow rate is delivered into the workpiece to be tested; the other channels are used as gas outlet channels, and the gas outlet volume is measured by the detection component to determine the degree of blockage.

[0040] The gas supply assembly includes: a gas supply source, a pressure reducing valve, an air inlet valve, and a total flow meter which are arranged in sequence; The tail end of the total flow meter is connected to a channel (channel 1 serving as air intake) through a hose.

[0041] It is understandable that a quick-insert interface or other mechanism is provided at the rear end of the hose to cooperate with the channel for connection.

[0042] The detection component includes: a flow meter connected to other channels.

[0043] When in use, the gas supply source provides gas supply, which is then sent into the workpiece to be tested through the open air inlet valve, total flow meter and hose after being pressure-regulated by the pressure reducing valve. It should be noted that all connection points should be sealed and leak-proof to avoid affecting the test results.

[0044] Furthermore, the air supply component also includes: a pressure sensor and an inlet temperature sensor arranged at the tail end of the intake valve.

[0045] Correspondingly, the pressure sensor can be used to measure and accurately control the pressure reducing valve; the inlet temperature sensor can be used to obtain the temperature data of the gas when it enters, and the temperature compensation calculation can be performed in conjunction with the conversion formula.

[0046] The detection component also includes an outlet temperature sensor arranged at the front end of the sub-flow meter.

[0047] Therefore, the temperature data of the gas flowing out of each channel can be obtained through the outlet temperature sensor; the heat conversion in each channel can be calculated; and it can also be combined with the flow data to assist in determining the distance from the intake end (the farther away from the intake end, the longer the gas path, and the corresponding temperature and pressure changes are greater).

[0048] In some embodiments, the detection component is connected to the channel of the workpiece to be detected through a three-way pipe.

[0049] Among them, one way of the three-way pipe is connected to the channel of the workpiece to be tested, one way is connected to the detection component, and the other way is connected to the expansion component; accordingly, each way of the three-way pipe is provided with an on-off valve for circuit switching.

[0050] Under normal conditions, the on-off valve corresponding to one route of the expansion component is in the closed state, and the on-off valves of the other two routes are in the open state; the airflow enters the detection component through the three-way pipe for daily detection.

[0051] In some embodiments, the expansion component is a vacuum device.

[0052] At this time, the airtightness of the connection can be measured by a vacuum device.

[0053] For example, when performing an airtightness test through test channel two, close the air inlet valve and all the on-off valves corresponding to the three-way pipes of other channels; open the two on-off valves corresponding to the detection component and the expansion component on the three-way pipe of channel two; then, connect the vacuum extraction device to the tail end of the expansion component; and determine whether there is insufficient airtightness at each connection point based on the vacuum conditions.

[0054] In some embodiments, the extension component is a flow meter detection connecting tube.

[0055] When in use, the other end of the flow meter detection connecting tube is connected to the branch flow meter corresponding to another channel.

[0056] like Figure 2 As shown; when measuring the sub-flowmeter on the far right, the tail end of the sub-flowmeter is connected to the flowmeter detection connecting pipe of the previous channel; except for the on-off valve on the far right three-way pipe connected to the workpiece to be measured, the other on-off valves connected to the workpiece to be measured are closed, and the flowmeter detection connecting pipes are connected to the sub-flowmeters in turn; this process is repeated to connect adjacent sub-flowmeters; at this time, under the ventilation detection state, if all sub-flowmeters are normal, then the data of each sub-flowmeter should be consistent; if the data of a sub-flowmeter is inconsistent, it can be determined that the sub-flowmeter is abnormal, or that multiple other sub-flowmeters are abnormal at the same time.

[0057] In some embodiments, it also includes: an industrial computer.

[0058] Correspondingly, the air supply component and the detection component are both communicatively connected to the industrial computer, and are adjusted and controlled by the industrial computer.

[0059] like Figure 3 As shown, the industrial computer can be a vertical structure, which is more convenient for batch testing; the industrial computer is provided with components such as a display and a result indicator light; preferably, the air supply component is arranged in the structural shell, and only the air supply structure is led outward and connected to a hose.

[0060] The result indicator lights include: a qualified light and an audible and visual warning light to display different states respectively.

[0061] like Fig.15 As shown; preferably, the industrial computer is provided with an analog quantity acquisition card, and communicates with each sensor through the analog quantity acquisition card.

[0062] In some embodiments, the industrial computer is provided with a flow analysis module.

[0063] The flow analysis module analyzes whether there is a leak by comparing the total flow meter with the sum of each sub-flow meter.

[0064] Simply put, if the value of the total flow meter is greater than the sum of the sub-flow meters, it can be determined that there is an airtight abnormality.

[0065] In addition, if the flow rate of the incoming gas is less than the preset flow rate of the gas supply component, and the value of the total flow meter is equal to the sum of the sub-flow meters, it can be determined that channel 1 (the channel connected to the gas supply component) is blocked.

[0066] In some embodiments, the flow analysis module analyzes whether there is an abnormality in any channel by comparing the difference between each sub-flow meter.

[0067] It is understandable that a normal flow range is preset for each channel; if the flow of a channel is lower than its lower limit, it is determined that the channel is abnormal.

[0068] Furthermore, the flow analysis module can also calculate the degree of congestion based on the comparison between the actual flow data and the normal flow range.

[0069] The simple calculation formula for the blocking rate is: ; Wherein, the theoretical gas flow rate is obtained based on pre-standardized test measurements.

[0070] When the actual gas flow rate is equal to the lower limit of the theoretical gas flow rate range, the blockage rate is 0%, indicating no blockage; when the actual gas flow rate is less than the lower limit of the theoretical gas flow rate range, the blockage rate is greater than 0%, and the smaller the actual flow rate, the higher the blockage rate; by calculating the ratio of the actual flow rate to the lower limit of the theoretical flow rate, the degree of blockage can be quantified.

[0071] In some embodiments, the flow analysis module is further provided with: a temperature compensation algorithm.

[0072] By detecting the temperature and flow data collected in the environment, the flow data at a specific working temperature can be calculated.

[0073] It is understandable that different operating temperatures have a certain impact on the gas flow rate; in order to improve accuracy, a temperature compensation algorithm is designed.

[0074] Assume that the known standard operating temperature is T0, the corresponding standard flow rate is Q0, the current measured operating temperature is T1, and the temperature coefficient of the gas is (This coefficient is pre-determined and stored in a database through a large number of experiments on multiple factors such as capillary manifold material and gas characteristics), and a relationship model between flow and temperature is constructed using the principle of linear regression.

[0075] Calculate temperature deviation ; The actual flow rate Q at any operating temperature is m The calculation formula is .

[0076] For example, if the standard flow rate of a certain type of capillary manifold at a standard operating temperature of 25°C is known, , gas temperature coefficient , the measured working temperature is 30℃; then the temperature deviation value , substituting into the formula, we can get the actual flow .

[0077] Through this algorithm, the influence of temperature factors on flow measurement can be compensated, making the flow detection results more accurate and reliable.

[0078] In some embodiments, the industrial computer is provided with a template configuration module; different parameters are set corresponding to different workpiece models to form preset templates of corresponding models; during detection, the corresponding parameters are read and loaded, such as the optimal inlet gas flow rate and pressure, the corresponding outlet gas flow values ​​of each channel, etc.

[0079] Furthermore, the industrial computer is also provided with: a statistical module; which automatically stores the test results, forms a test record, and counts the qualified rate within a period of time.

[0080] In some embodiments, it also includes: a code scanning component; the code scanning component is connected to the industrial computer for communication; the model of the workpiece is identified by reading the QR code of the workpiece to be tested, and the corresponding template is automatically retrieved and the relevant parameters are loaded.

[0081] It is understandable that the code scanning component is a high-definition camera; an identity identification code needs to be set on the corresponding workpiece.

[0082] In some embodiments, the air supply assembly and the detection assembly are installed through a bracket assembly.

[0083] The support assembly includes: a base plate 1, a clamping plate 2 fixed on the base plate 1 to support the air supply assembly, and a support 3 placed on the base plate 1 to support the detection assembly.

[0084] The base plate 1 provides a basic installation and placement position; the clamping plate 2 and the support 3 are arranged above the base plate 1 .

[0085] No less than two clamping plates 2 are provided to form at least two supporting points for fixing the workpiece to be measured.

[0086] In order to adapt to the outer diameters of workpieces of different types, the clamping plate 2 is adaptively set.

[0087] Specifically, an open card slot 21 is provided at the top of the card plate 2, and inwardly folded elastic members 22 are provided on both sides of the card slot 21; wherein the elastic member 22 is composed of a semicircular spring piece and a flat plate with the end of the semicircular spring piece folded inward; the connection between the semicircular spring piece and the flat plate is set as an arc angle.

[0088] When in use, the workpiece to be measured is directly inserted downward, or the elastic member 22 is bent upward and then the workpiece to be measured is inserted; under the restoring action of the elastic member 22, the workpiece is stably clamped.

[0089] Furthermore, a notch is provided below the slot 21, and a pressing screw 23 connected with threads is penetrated upward.

[0090] Therefore, the workpiece to be measured can be pushed upward by the pressing screw 23, further expanding the adaptation range.

[0091] It is understandable that when the diameter of the workpiece is smaller, the elastic member 22 may not be able to clamp tightly. At this time, the pressing screw 23 is partially screwed upward to push the workpiece.

[0092] In some embodiments, the support 3 includes: a bayonet 31 with a top opening, a support rod 32 connected to the lower end of the bayonet 31 , and a base 33 disposed at the lower end of the support rod 32 .

[0093] The bayonet 31 is larger than half a circle, and both sides of the upper end are bent inwards.

[0094] Furthermore, the support rod 32 is an adjustable telescopic rod; the support height can be adjusted.

[0095] It is understandable that the specification of the detection component is fixed; the support 3 only needs to have one specification.

[0096] Furthermore, a magnet is embedded in the lower end of the base 33; accordingly, the substrate 1 is made of a material that can be attracted by the magnet; or, a magnetic attraction strip that cooperates with the magnet is provided on the substrate; so that the base 33 can be placed more stably.

[0097] It should be noted that, since the workpiece to be tested has various models and different numbers of channels, the intervals between the channels are also variable; in order to be more flexible, the support 3 is set to a movable form through magnetic attraction; it can be placed and adjusted at will on the substrate 1.

[0098] In some embodiments, a junction box 4 is also provided on the substrate 1, which collects the wiring of each detection component and connects it to the industrial computer; it can be understood that the junction box 4 and the industrial computer are both provided with sockets.

[0099] In some embodiments, a workpiece in-place sensor is disposed below the substrate 1 corresponding to the position of the workpiece to be measured.

[0100] Among them, the workpiece arrival sensor can adopt various forms such as photoelectric sensor, magnetic induction sensor, etc., so as to be able to detect whether there is a workpiece placed above.

[0101] It can be understood that the workpiece arrival sensor feeds back the detection signal to the industrial computer.

[0102] Furthermore, the workpiece arrival sensor can trigger automatic start-up of the air supply component.

[0103] When the device is used, the program is initialized after the industrial computer is started, the workpiece to be tested is manually placed in place, connected, and adjusted in shape, and then the test signal is automatically triggered, the air supply component operates, and the air supply source's air valve is opened; the gas enters the workpiece to be tested through the pressure reducing valve, the air inlet valve, and the total flow meter; then, according to the values ​​measured by each sensor, it is calculated whether each channel is blocked.

[0104] In the present invention, an air supply component and a detection component are provided, and by accurately measuring the flow of each channel, an abnormal state can be accurately identified and a blockage analysis can be performed; a pressure reducing valve is provided to cooperate with a pressure sensor to accurately adjust the pressure and flow rate of the input gas; an inlet temperature sensor is provided to cooperate with a conversion formula to perform temperature compensation calculation; an extension component is provided to enhance the detection function; the air supply component and the detection component are communicatively connected to an industrial computer, and the industrial computer is used to adjust and control them, which is more intelligent and efficient; the industrial computer is a vertical structure, which is more convenient for batch detection; a result indicator light is provided to display different states respectively; a template configuration module is provided, which corresponds to different workpiece models, sets different parameters, and forms a preset template of the corresponding model; a code scanning component is provided to read the QR code of the workpiece to be tested to identify the model of the workpiece, automatically retrieve the corresponding template, and load the relevant parameters; it is installed through a bracket component, which is flexible to use and adaptable to workpieces of different models to be tested; a junction box 4 is provided to collect the wiring of each detection component and connect it to the industrial computer, which is more neat and reliable; a workpiece in place sensor is provided to detect whether a workpiece is placed above, and a trigger to start the air supply component can be set.

[0105] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A multi-channel condenser capillary manifold flow blockage measuring instrument, characterized in that: include: An air supply component connected to any channel of the workpiece to be tested, and a plurality of detection components respectively connected to other channels; The air supply assembly comprises: an air supply source, a pressure reducing valve, an air inlet valve, and a total flow meter which are arranged in sequence; the tail end of the total flow meter is connected to a channel through a hose; The detection component includes: a sub-flow meter connected to other channels.

2. The multi-channel condenser capillary manifold flow blockage measuring instrument according to claim 1, characterized in that: The air supply assembly further includes: a pressure sensor and an inlet temperature sensor arranged at the tail end of the air inlet valve; The detection component also includes an outlet temperature sensor arranged at the front end of the sub-flow meter.

3. The multi-channel condenser capillary manifold flow blockage measuring instrument according to claim 1, characterized in that: The detection component is connected to the channel of the workpiece to be tested through a three-way pipe; one way of the three-way pipe is connected to the channel of the workpiece to be tested, one way is connected to the detection component, and the other way is connected to the expansion component; each way of the three-way pipe is provided with an opening and closing valve.

4. The multi-channel condenser capillary manifold flow blockage measuring instrument according to claim 1, characterized in that: Also includes: Industrial computer; The air supply component and the detection component are both connected to the industrial computer for communication and are adjusted and controlled by the industrial computer; The industrial computer is provided with a flow analysis module; The flow analysis module analyzes whether there is leakage by comparing the total flow meter with the sum of each sub-flow meter; the flow analysis module analyzes whether there is abnormality in any channel by comparing the difference between each sub-flow meter.

5. The multi-channel condenser capillary manifold flow blockage measuring instrument according to claim 4, characterized in that: The flow analysis module is also provided with: a temperature compensation algorithm; by detecting the temperature and flow data collected in the environment, the flow data at a specific working temperature is calculated.

6. The multi-channel condenser capillary manifold flow blockage measuring instrument according to claim 4, characterized in that: Also includes: Scan code component; The code scanning component is connected to the industrial computer for communication; the model of the workpiece is identified by reading the QR code of the workpiece to be measured, and the corresponding template is automatically retrieved and relevant parameters are loaded.

7. The multi-channel condenser capillary manifold flow blockage measuring instrument according to claim 1, characterized in that: The air supply assembly and the detection assembly are installed through a bracket assembly; The support assembly comprises: a base plate (1), a clamping plate (2) fixed on the base plate (1) and supporting the air supply assembly, and a support (3) placed on the base plate (1) and supporting the detection assembly.

8. The multi-channel condenser capillary manifold flow blockage measuring instrument according to claim 7, characterized in that: An open card slot (21) is provided at the top of the card plate (2), and inwardly folded elastic members (22) are provided on both sides of the card slot (21); The elastic member (22) is composed of a semicircular spring piece and a flat plate with the end of the semicircular spring piece folded inward; the connection between the semicircular spring piece and the flat plate is arranged as an arc angle.

9. The multi-channel condenser capillary manifold flow blockage measuring instrument according to claim 7, characterized in that: A notch is provided below the clamping slot (21), and a pressing screw rod (23) connected with a thread is passed through upward.

10. The multi-channel condenser capillary manifold flow blockage measuring instrument according to claim 7, characterized in that: The support (3) comprises: a bayonet (31) with a top opening, a support rod (32) connected to the lower end of the bayonet (31), and a base (33) arranged at the lower end of the support rod (32).

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