KR20220035664A - Distributor inspection device for air conditioner - Google Patents

Abstract

The present invention relates to a distribution pipe inspection device for an air conditioner, which includes a connector having a fluid inlet through which refrigerant can flow, a connector connected to the connector, and a refrigerant passage through which the refrigerant flowing through the fluid inlet flows. , a setting section in which a distribution pipe having a plurality of capillary pipes with an outlet at the end through which the refrigerant passing through the refrigerant passage is discharged is set, and a setting unit installed in the connector to inject air of a predetermined pressure through the fluid inlet. an air injection unit, a sensing unit installed on the capillary pipes to detect pressure changes inside the distribution pipe with respect to the air injected from the air injection unit, and an inside of the distribution pipe provided by the sensing unit. A determination unit is provided to determine whether the distribution pipe is clogged or leaking based on information about pressure changes.
The distribution pipe inspection device for air conditioners according to the present invention can inject high-pressure air into the distribution pipe to be inspected and then measure the pressure change to inspect the distribution pipe for blockages or leaks, making it easier for even non-experts to perform the inspection. It has the advantage of being able to reduce the time required for inspection by continuously performing blockage inspection and leakage inspection of distribution pipes, and has the advantage of high inspection reliability.

Description

Distributor inspection device for air conditioner}

The present invention relates to a distribution pipe inspection device for an air conditioner, and more specifically, an air conditioner that injects high-pressure air into a distribution pipe to be inspected and then measures the pressure change to inspect whether the distribution pipe is clogged or leaking. It relates to a distribution pipe inspection device.

In general, small-diameter distribution pipes that are installed in various refrigeration and air-conditioning equipment or circulatory systems containing cooling water to secure a fluid circulation path are made up of a single body through the main connector and a number of capillary pipes welded to these connectors. This distribution pipe is manufactured by preheating the joint between the temporarily coupled connector and the capillary pipe by spraying flame, and then joining linear fusible materials to the preheated joint.

Quality inspection of distribution pipes includes leakage testing at the joints of the capillary pipe and internal blockage testing. In the conventional leak test, the distribution pipe is immersed in water under pressure and visually checks whether bubbles are generated to determine whether the pipe joint is leaking. In addition, in the blockage test, air is blown into the capillary pipe, the end of the capillary pipe is exposed to air in the carpet, and the movement of the carpet hairs is visually observed to determine whether the pipe is clogged.

At this time, in the case of a leak test, the distribution pipe is submerged in water, so it is difficult to remove the water remaining in the distribution pipe after the test, and in the case of a blockage test, the condition of the air discharged after supplying air to the distribution pipe is checked. The disadvantage is that it is cumbersome because it must be visually inspected using a carpet, and the reliability of the inspection results is somewhat low.

Korean Patent No. 10-1821803: Industrial endoscope and pipe inspection method using it

The present invention was created to improve the above problems, and is a distribution pipe for an air conditioner that injects high-pressure air into the distribution pipe to be inspected and then measures the pressure change to check whether the distribution pipe is clogged or leaking. The purpose is to provide inspection equipment.

In order to achieve the above object, a distribution pipe inspection device for an air conditioner according to the present invention includes a connector having a fluid inlet through which refrigerant can flow, a connector connected to the connector, and a refrigerant in which the refrigerant flowing through the fluid inlet flows. A setting part in which a distribution pipe is set, which has a flow path formed and a plurality of capillary pipes having an outlet at the end through which the refrigerant passing through the refrigerant flow path is discharged, and which is installed in the connector to discharge a predetermined pressure through the fluid inlet. an air injection unit that injects air, a sensing unit installed in the capillary pipes to detect a change in pressure inside the distribution pipe with respect to the air injected from the air injection unit, and the sensing unit provided by the sensing unit. A determination unit is provided to determine whether the distribution pipe is clogged or leaking based on information about pressure changes inside the distribution pipe.

The sensing unit is connected to each end of the capillary pipes to communicate with the outlet, and senses the internal pressure of the capillary pipes, a plurality of exhaust pipes with exhaust passages formed therein, or the refrigerant passage of the capillary pipes. It is equipped with a plurality of pressure sensors installed in each of the exhaust pipes to measure the pressure of the air passing through, and a plurality of opening and closing valves installed in each of the exhaust pipes to open and close the exhaust passage.

The determination unit operates the air injection unit so that air with a predetermined pressure is injected into the fluid inlet, and in a state where air is injected into the connector, the pressure of the air passing through the refrigerant passage among the capillary pipes is The capillary pipe below the set reference pressure is determined as a clogged pipe, and when the determination of whether the capillary pipe is clogged is completed, the opening and closing valves are operated to close the exhaust passages of the exhaust pipes, and the air is injected. After stopping the operation of the unit, the capillary pipe whose internal pressure decreases among the capillary pipes is determined as the pipe in which leakage has occurred.

The determination unit includes a selection module configured to allow the operator to select either a leak inspection mode or a blockage inspection mode, and controls the air injection unit and the sensing unit according to the inspection mode selected in the selection module, provided by the pressure sensors. An inspection module is provided to analyze whether the distribution pipe is clogged or leaking based on the sensing information.

When the blockage inspection mode is selected in the selection module, the inspection module operates the air injection unit so that air with a predetermined pressure is injected into the fluid inlet, and in a state where air is injected into the connector, the capillary Among the pipes, a capillary pipe in which the pressure of air passing through the refrigerant passage is less than a preset reference pressure is determined as a pipe with a blockage, and when the leakage test mode is selected in the selection module, it is sent to the fluid inlet. The air injection unit is operated so that air with a predetermined pressure is injected for a preset injection time, and after the injection time has elapsed, the opening and closing valves are operated so that the exhaust passages of the exhaust pipes are closed, and the operation of the air injection unit is stopped. After doing so, the capillary pipe whose internal pressure decreases among the capillary pipes is determined as the pipe in which leakage has occurred.

The setting unit includes a base member on one side of which a plurality of exhaust pipes are installed to be spaced apart from each other, and is installed opposite to one side of the base member, and ends of the capillary pipes are inserted so that they can be respectively connected to the exhaust pipes. Pipe support members each having a through hole are provided at positions opposite to the exhaust pipes.

The through hole may have an inner diameter that decreases as it approaches one side of the base member so as to guide the end of the capillary pipe to be inserted into the exhaust pipe.

The pipe support member is installed on the base member to be movable so as to be adjacent to or away from one side of the base member along the insertion direction of the capillary pipe with respect to the through hole, and the setting portion is positioned on the capillary pipe. When the connection between the end and the exhaust pipe is completed, an actuator installed on the pipe support member to move the pipe support member adjacent to the base member so that the capillary pipe can be easily separated from the pipe support member. It is further provided with

The capillary pipe is formed to be curved in multiple stages, and the pipe support member is formed so that the through holes are spaced apart from each other along the setting direction so that the ends of the capillary pipes can be arranged along the preset setting direction. , the setting unit may further include at least one restraining tie formed to surround a portion of the capillary pipes so that their outer peripheral surfaces are in close contact with each other so that the ends of the capillary pipes inserted into the through hole can be mutually restrained. .

The distribution pipe inspection device for air conditioners according to the present invention can inject high-pressure air into the distribution pipe to be inspected and then measure the pressure change to inspect the distribution pipe for blockages or leaks, making it easier for even non-experts to perform the inspection. It has the advantage of reducing the time required for inspection as it can continuously conduct blockage and leakage inspections of distribution pipes, and has the advantage of high inspection reliability.

1 is a perspective view of a distribution pipe inspection device for an air conditioner according to the present invention;
Figure 2 is a partial cross-sectional view of the distribution pipe inspection device for the air conditioner of Figure 1;
Figure 3 is a block diagram of the distribution pipe inspection device for the air conditioner of Figure 1;
Figure 4 is a block diagram of a distribution pipe inspection device for an air conditioner according to another embodiment of the present invention.

Hereinafter, a distribution pipe inspection device for an air conditioner according to an embodiment of the present invention will be described in detail with reference to the attached drawings. Since the present invention can be subject to various changes and can have various forms, specific embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention. While describing each drawing, similar reference numerals are used for similar components. In the attached drawings, the dimensions of the structures are enlarged from the actual size for clarity of the present invention.

Terms such as first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, a first component may be named a second component without departing from the scope of the present invention, and similarly, the second component may also be named a first component.

The terms used in this application are only used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless explicitly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

1 to 3 show a distribution pipe inspection device 100 for an air conditioner according to the present invention.

Referring to the drawing, a setting unit 200 in which a distribution pipe 10 to be inspected is set, and an air injection unit 300 that injects air at a predetermined pressure into the distribution pipe 10 set in the setting unit 200. and a sensing unit 400 that detects a change in pressure inside the distribution pipe 10 with respect to the air injected from the air injection unit 300, and an inside of the distribution pipe 10 provided by the sensing unit 400. It is provided with a determination unit 500 that determines whether the distribution pipe 10 is clogged or leaking based on information about pressure changes.

Here, the distribution pipe 10 is used in an air conditioner such as an air conditioner, and is connected to a connector 11 having a fluid inlet through which refrigerant can flow, and is connected to the connector 11, and flows into the inside through the fluid inlet. A refrigerant passage through which the refrigerant flows is formed, and a plurality of capillary pipes 12 are provided at the ends with outlets through which the refrigerant passing through the refrigerant passage is discharged. Here, the capillary pipes 12 are preferably formed to be curved in multiple stages so that the discharge ports face downward.

The setting unit 200 includes a frame 210, a base member 220 installed on the frame 210, and on the upper surface of which exhaust pipes 401 of the sensing unit 400, which will be described later, are installed to be spaced apart from each other, and the base It is installed on the upper part of the member 220, and a through hole 231 is formed at a position opposite to the exhaust pipes 401 so that the ends of the capillary pipes 12 can be inserted and connected to the exhaust pipes 401, respectively. It is provided with a pipe support member (230).

The frame 210 is supported by a plurality of support rods 211 at a predetermined distance upward from the floor or ground of the factory. At the rear of the upper surface of the frame 210, a storage block 212 is provided so that a plurality of notification lamps 511, etc. can be installed.

The base member 220 is installed in the front part of the frame 210 and extends a predetermined length in the left and right directions. The base member 220 has a plurality of exhaust pipes 401 installed on its upper surface, and it is preferable that they are spaced apart from each other. The base member 220 is preferably made of a metallic material having a predetermined strength.

In addition, a plurality of support brackets 221 are installed at the bottom of the base member 220 so that the actuator 240 of the setting unit 200, which will be described later, can be installed. The support bracket 221 provides an installation space so that the actuator 240 can be installed, and a plurality of support brackets 221 are formed to be spaced apart from each other along the left and right directions.

The pipe support member 230 has a width corresponding to the front and rear widths of the base member and is formed to extend a predetermined length in the left and right directions. In addition, the pipe support member 230 has a plurality of through holes 231 formed in the vertical direction so that the end of the capillary pipe 12 can be inserted. At this time, the corresponding through holes 231 are opposite to the exhaust pipes 401, and are spaced at equal intervals along the corresponding setting direction, that is, in the left and right directions, so that the ends of the capillary pipes 12 can be arranged along the preset setting direction. It is desirable that they are formed to be spaced apart from each other.

Meanwhile, the through hole 231 is formed so that its inner diameter decreases as it approaches one side of the base member 220 so that the end of the capillary pipe 12 to be inserted can be guided to the exhaust pipe 401. there is.

In addition, the pipe support member 230 is movable to be adjacent to or away from the upper surface of the base member along the insertion direction of the capillary pipe 12 with respect to the through hole 231, that is, the vertical direction. It is installed at (220). At this time, a plurality of guide panels 232 are installed on the front and rear edges of the pipe support member 230 to guide movement with respect to the base member 220. The guide panel 232 is installed at the front and rear ends of the pipe support member 230, respectively, and extends a predetermined length downward from the pipe support member 230 so that it can interfere with the front and back sides of the base member 220, respectively. The guide panels 232 interfere with the base member 220 and prevent the pipe support member 230 from being separated from the base member 220.

At this time, connection members 234 are installed on each of the guide panels 232 opposite the support brackets 221 so that they can be connected to the actuator 240 installed on the support bracket 221. The connecting member 234 extends downward for a predetermined length, and its lower end is curved in the front-back direction to be inserted into the installation space of the support bracket 221.

Additionally, guide rods 233 are installed on the left and right ends of the pipe support member 230, respectively. The guide rod 233 extends in the vertical direction, the lower end is fixed to the frame 210 at a predetermined distance to the left and right from the base member 220, and the upper end penetrates the pipe support member 230. This guides the movement of the pipe support member 230. The pipe support member 230 is prevented from deviating to the left and right sides of the base member 220 when moved by the corresponding guide rod 233.

Meanwhile, the setting unit 200 allows the capillary pipe 12 to be easily separated from the pipe support member 230 when the connection between the end of the capillary pipe 12 and the exhaust pipe 401 is completed. an actuator 240 installed on the pipe support member 230 so as to move the pipe support member 230 adjacent to the base member, and an actuator 240 whose end is inserted into the through hole 231. A plurality of restraining ties 250 formed to surround a portion of the capillary pipes 12 so that their outer circumferential surfaces are in close contact with each other are further provided to restrain the capillary pipes 12 to each other.

The actuator 240 uses a driving means that expands and contracts its length in the vertical direction by hydraulic pressure or electricity applied from the outside. The actuator 240 is installed at the upper and lower ends of the frame 210 and the pipe support member 230, respectively, and can raise and lower the corresponding pipe support member 230. Additionally, the actuator 240 may be installed on a support bracket 221 provided on the base member 220, and its upper end may be fixed to the connecting member 234 inserted into the support bracket 221. The actuator 240 moves the pipe support member 230 toward or away from the base member 220 by the operator's manipulation.

The restraining tie 250 is formed to surround the plurality of capillary pipes 12 and closely adheres to and restrains the capillary pipes 12. The restraining tie 250 is a cable tie commonly used in the related art to mutually restrain pipes or wires. Meanwhile, in the illustrated example, a structure in which a plurality of restraining ties 250 are installed on the distribution pipe 10 is shown, but one restraining tie 250 may be installed depending on the size of the distribution pipe 10.

First, the worker sets restraining ties 250 on the capillary pipes 12 of the distribution pipe 10. At this time, the restraining ties 250 are somewhat loosely wound around the capillary pipes 12. Next, the ends of the capillary pipes 12 are respectively inserted into the through holes 231 of the pipe support member 230. At this time, the capillary pipes 12 are guided to the exhaust pipe 401 by the through hole 231 and are more easily connected to the exhaust pipe 401. In addition, since the through-holes 231 are arranged at equal intervals along the left and right directions, which are preset directions, when the capillary pipes 12 are inserted into the through-holes 231, the ends of the capillary pipes 12 Arranged according to the setting direction. Next, the worker wraps the restraining ties 250 more strongly around the capillary pipes to bring the capillary pipes 12 into close contact. The ends of the capillary pipes 12 are arranged linearly by the restraining tie 250 and the through holes 231 of the pipe support member 230, and the volume is reduced, but they are mutually restrained, giving a structurally more robust appearance. can be maintained. When the restraint of the capillary pipe 12 using the restraining ties 250 is completed, the operator operates the actuators 240 to move the pipe support member 230 adjacent to the base member 220. At this time, the space between the outer peripheral surface of the capillary pipe 12 inserted into the through hole 231 and the inner wall of the through hole 231 is expanded, and after the leakage test and clogging test are completed, the capillary pipe 12 is more easily removed from the exhaust pipe 401. The lip pipe (12) can be separated.

The air injection unit 300 includes a connection nozzle 301 connected to the fluid inlet of the connector 11 of the distribution pipe 10 set in the setting unit 200, and a supply pipe 302 connected to the connection nozzle 301. and a compressor (not shown) installed in the supply pipe 302 to supply high-pressure air to the connection nozzle 301, and an operation to open and close the internal flow path of the supply pipe 302, installed in the supply pipe 302. Equipped with a valve (not shown).

The end of the connection nozzle 301 is inserted into the fluid inlet of the connector 11 and is coupled to the connector 11. An injection hole (not shown) is formed at the end of the connection nozzle 301 to inject air into the fluid inlet. One end of the supply pipe 302 is connected to the connection nozzle 301, and the other end is connected to the compressor. At this time, the supply pipe 302 is preferably made of a flexible material so that the operator can easily bend it to connect the connection nozzle 301 to the connector 11.

The compressor supplies high-pressure air to the connection nozzle 301 through the supply pipe 302. Here, although the compressor is not shown in the drawing, a regulator (not shown) may be installed to reduce the pressure of air supplied from the compressor to a preset pressure and supply it to the supply pipe 302. The operating valve is installed in the supply pipe 302, and it is desirable to use a solenoid valve so that the operating valve can be operated from a distance. The corresponding operating valve is controlled by the determination unit 500.

The sensing unit 400 is connected to each end of the capillary pipes 12 so as to communicate with the outlet, and has a plurality of exhaust pipes 401 with exhaust passages formed therein, and the inside of the capillary pipes 12. A plurality of pressure sensors 402 installed in each of the exhaust pipes 401 can be used to detect pressure or measure the pressure of air passing through the refrigerant passage of the capillary pipe 12, and to open and close the exhaust passage. A plurality of opening and closing valves (403) are installed in each of the exhaust pipes (401) of the house so as to be provided.

One end of the exhaust pipe 401 is installed on the base member 220, and the other end is installed on the storage block 212 of the frame 210. At this time, the exhaust pipe 401 has an exhaust passage formed inside, a communication port communicating with the exhaust passage is formed at one end, and an exhaust port (not shown) is formed at the other end for the air passing through the exhaust passage to be discharged to the outside. there is. The exhaust pipe 401 is installed on the base member 220 so that the communication port is directed upward. It is preferable that a plurality of exhaust pipes 401 are installed at positions opposite to the through port 231 of the pipe support member 230. At this time, the exhaust pipe 401 is preferably installed to protrude upward with respect to the upper surface of the base member 220 so that one end can be inserted into the through hole 231. In addition, the exhaust pipe 401 is formed to have an outer diameter corresponding to the inner diameter of the outlet of the capillary pipe 12 so that it can be tightly fitted into the capillary pipe 12.

The pressure sensor 402 is installed at one end of the exhaust pipe 401 adjacent to the communication port to detect the internal pressure of the capillary pipes 12 or to detect the internal pressure of the capillary pipe 12 passing through the refrigerant passage. Measure the air pressure. Here, the pressure sensor 402 is a sensing means commonly used in the related art to measure the fluid passing through the pipe or the pressure inside the pipe, so detailed description will be omitted. The pressure sensor 402 provides the measured measurement information to the determination unit 500.

The opening/closing valve 403 is installed in the exhaust pipe 401 at a position spaced apart from the other end of the exhaust pipe 401 with respect to the pressure sensor 402, and opens and closes the exhaust passage of the exhaust pipe 401. The opening/closing valve 403 is preferably a solenoid valve so that it can be controlled from a distance. The opening/closing valve 403 is controlled by the determination unit 500.

The determination unit 500 determines whether the distribution pipe 10 is clogged or leaking based on information about pressure changes inside the distribution pipe 10 provided by the sensing unit 400.

First, the determination unit 500 operates the compressor of the air injection unit 300 so that air with a predetermined pressure is injected into the fluid inlet. At this time, the determination unit 500 operates the opening/closing valves 403 so that the exhaust passages of the exhaust pipes 401 are opened. The air supplied from the compressor is reduced to a preset pressure through a regulator and injected into the fluid inlet of the connector 11 through the connection nozzle 301. Here, in a state where air is injected into the connector 11, the determination unit 500 determines whether the pressure of the air passing through the refrigerant passage among the capillary pipes 12 is lower than the preset reference pressure. is identified as a pipe in which a blockage has occurred.

Next, when the determination unit 500 completes the determination of whether the capillary pipe 12 is clogged, it operates the opening/closing valves 403 so that the exhaust passages of the exhaust pipes 401 are closed. Then, the exhaust pipe 401 is closed by the opening/closing valve 403, and then the operation of the air injection unit 300 is stopped. At this time, the determination unit 500 preferably operates the operating valve to close the supply pipe 302 to prevent air from being injected into the distribution pipe 10 or from being discharged from the distribution pipe 10. Next, the determination unit 500 determines whether a leak occurs in the capillary pipe 12 whose internal pressure decreases for a predetermined time among the capillary pipes 12 based on the measurement information provided by the pressure sensors 402. determined by the pipe.

Meanwhile, the determination unit 500 may further include a display unit 510 capable of displaying determination information about the capillary pipe 12 or measurement information provided by the pressure sensors 402.

The display unit 510 is installed on the front of the storage block 212 of the frame 210, has a plurality of notification lamps 511 installed spaced apart from each other along the left and right directions, and a position adjacent to the notification lamps 511. A plurality of display members (not shown) are installed on the front of the storage block 212 to display measurement information of the pressure sensors 402, respectively.

The notification lamp 511 is operated by the determination unit 500 to generate a warning lamp. The determination unit 500 determines that a blockage or leakage defect has occurred in the capillary pipe 12, and operates the notification lamp 511 to display a warning lamp. Here, the notification lamps 511 and the through holes 231 of the pipe support member 230 are sequentially numbered along the left and right directions, and the determination unit 500 determines the capillary pipe 12 in which a defect has been determined. ) operates the notification lamp 511 in the same order as the inserted through hole 231. For example, if a defect occurs in the capillary pipe 12 inserted into the first through hole 231 in the left and right direction among the through holes 231, the determination unit 500 displays one of the notification lamps 511. The first notification lamp (511) is activated based on the left and right directions.

The display member has a display window to display the pressure value measured by the pressure sensor 402. Although not shown in the drawings, a plurality of corresponding display members may be arranged on the front of the storage block 212 of the frame 210 to be spaced apart from each other along the left and right directions.

Meanwhile, the display unit 510 is not limited to this and can be applied to any display means that can display discrimination information and measurement information provided by the pressure sensors 402.

The distribution pipe inspection device 100 for an air conditioner according to the present invention configured as described above injects high-pressure air into the distribution pipe 10 to be inspected and then measures the pressure change to determine whether the distribution pipe 10 is clogged or leaking. Since it is possible to test whether or not the test is present, even non-experts can perform the test more easily, and since the blockage test and leakage test of the distribution pipe 10 can be performed continuously, the time required for the test can be reduced, and the test reliability is high. There is an advantage.

Meanwhile, Figure 4 shows a determination unit 600 according to another embodiment of the present invention.

Elements that perform the same function as those in the previously shown drawings are denoted by the same reference numerals.

Referring to the drawing, the determination unit 600 includes a selection module 601 configured to allow an operator to select either a leakage test mode or a blockage test mode, and the test mode selected in the selection module 601. An inspection module 602 that controls the air injection unit 300 and the sensing unit 400 and analyzes whether the distribution pipe 10 is clogged or leaks based on the sensing information provided by the pressure sensors 402. Equipped with

The selection module 601 is provided with a plurality of selection buttons (not shown) so that the operator can select either the leakage test mode or the blockage test mode. Here, the selection module 601 is preferably installed on the frame 210 adjacent to the base member 220 so that the operator can easily operate it.

When the blockage inspection mode is selected in the selection module 601, the inspection module 602 operates the compressor of the air injection unit 300 so that air with a predetermined pressure is injected into the fluid inlet. At this time, the inspection module 602 operates the opening and closing valves 403 so that the exhaust passages of the exhaust pipes 401 are opened. The air supplied from the compressor is reduced to a preset pressure through a regulator and injected into the fluid inlet of the connector 11 through the connection nozzle 301. Here, the inspection module 602 is a capillary pipe 12 in which the pressure of air passing through the refrigerant passage among the capillary pipes 12 is lower than the preset reference pressure while air is injected into the connector 11. is identified as a pipe in which a blockage has occurred. The inspection module 602 operates the notification lamp 511 of the display unit 510 according to the corresponding determination information.

Meanwhile, when the leakage test mode is selected in the selection module 601, the inspection module 602 operates the compressor of the air injection unit 300 so that air with a predetermined pressure is injected into the fluid inlet for a preset injection time. Make it work. After the injection time has elapsed, the inspection module 602 operates the opening and closing valves 403 so that the exhaust passages of the exhaust pipes 401 are closed, and stops the operation of the air injection unit 300, Among the capillary pipes 12, the capillary pipe 12 whose internal pressure decreases is determined as the pipe with leakage. The inspection module 602 operates the notification lamp 511 of the display unit 510 according to the corresponding determination information.

As described above, the determination unit 600 may independently perform a leakage test or a blockage test according to the test mode selected in the selection module 601.

The description of the presented embodiments is provided to enable any person skilled in the art to use or practice the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments without departing from the scope of the invention. Thus, the present invention is not limited to the embodiments presented herein, but is to be construed in the broadest scope consistent with the principles and novel features presented herein.

100: Distribution pipe inspection device for air conditioner 200: Setting section
210: frame 211: support rod
212: storage block 220: base member
221: support bracket 230: pipe support member
231: Through hole 232: Guide panel
233: Guide rod 240: Actuator
250: Confinement tie 300: Air injection part
301: Connection nozzle 302: Supply pipe
400: Sensing unit 401: Exhaust pipe
402: Pressure sensor 403: Open/close valve
500: Determination unit 510: Display unit

Claims (9)

A connector having a fluid inlet through which the refrigerant can flow, is connected to the connector, and has a refrigerant passage inside which the refrigerant flowing through the fluid inlet flows, and at the end, the refrigerant that has passed through the refrigerant passage is discharged. A setting section in which a distribution pipe including a plurality of capillary pipes with discharge ports is set;
an air injection unit installed in the connector to inject air at a predetermined pressure through the fluid inlet;
A sensing unit installed in the capillary pipes to detect a change in pressure inside the distribution pipe with respect to the air injected from the air injection unit; and
A determination unit that determines whether the distribution pipe is clogged or leaking based on information about pressure changes inside the distribution pipe provided by the sensing unit,
Distribution pipe inspection device for air conditioners.
According to paragraph 1,
The sensing unit
a plurality of exhaust pipes each connected to the ends of the capillary pipes to communicate with the discharge port and having an exhaust flow path formed therein;
a plurality of pressure sensors installed in each of the exhaust pipes to sense the internal pressure of the capillary pipes or measure the pressure of air passing through the refrigerant passage of the capillary pipe; and
Equipped with a plurality of opening and closing valves each installed in the exhaust pipes of the house to open and close the exhaust passage,
Distribution pipe inspection device for air conditioners.
According to paragraph 2,
The determination unit
The air injection unit is operated so that air with a predetermined pressure is injected into the fluid inlet, and in a state in which air is injected into the connector, the pressure of the air passing through the refrigerant passage among the capillary pipes is a preset reference pressure. The capillary pipe below is determined as a pipe with a blockage,
When the determination of whether the capillary pipe is clogged is completed, the opening and closing valves are operated so that the exhaust passages of the exhaust pipes are closed, the operation of the air injection unit is stopped, and the internal pressure of the capillary pipes is reduced. To determine a capillary pipe that is leaking,
Distribution pipe inspection device for air conditioners.
According to paragraph 2,
The determination unit
A selection module configured to allow an operator to select either a leak test mode or a blockage test mode; and
An inspection module that controls the air injection unit and the sensing unit according to the inspection mode selected in the selection module, and analyzes whether the distribution pipe is blocked or leaks based on the sensing information provided by the pressure sensors. Equipped with,
Distribution pipe inspection device for air conditioners.
According to clause 4,
The inspection module is
When the blockage inspection mode is selected in the selection module, the air injection unit is operated so that air with a predetermined pressure is injected into the fluid inlet, and in a state in which air is injected into the connector, the A capillary pipe in which the pressure of air passing through the refrigerant passage is lower than the preset standard pressure is determined as a pipe with a blockage,
When the leakage test mode is selected in the selection module, the air injection unit is operated so that air with a predetermined pressure is injected into the fluid inlet for a preset injection time, and after the injection time has elapsed, the air injection unit is operated to inject air with a predetermined pressure into the fluid inlet. After operating the on-off valves so that they are closed and stopping the operation of the air injection unit, the capillary pipe whose internal pressure decreases among the capillary pipes is determined as the pipe in which the leak has occurred,
Distribution pipe inspection device for air conditioners.
According to paragraph 2,
The setting section
A base member on which a plurality of exhaust pipes are installed on one side to be spaced apart from each other; and
A pipe support member installed opposite to one side of the base member and having a through hole formed at a position opposite to the exhaust pipes so that the ends of the capillary pipes can be inserted and connected to the exhaust pipes, respectively. ,
Distribution pipe inspection device for air conditioners.
According to clause 6,
The through hole is formed to have an inner diameter that decreases as it approaches one side of the base member so as to guide the end of the capillary pipe to be inserted into the exhaust pipe.
Distribution pipe inspection device for air conditioners.
In clause 7,
The pipe support member is installed on the base member to be movable adjacent to or away from one side of the base member along the insertion direction of the capillary pipe into the through hole,
When the connection between the end of the capillary pipe and the exhaust pipe is completed, the setting unit may move the pipe support member adjacent to the base member so that the capillary pipe can be easily separated from the pipe support member. Provided with an actuator installed on the pipe support member,
Distribution pipe inspection device for air conditioners.
According to clause 6,
The capillary pipe is formed to be curved in multiple stages,
The pipe support member is formed such that the through holes are spaced apart from each other along a preset direction so that the ends of the capillary pipes can be arranged along a preset direction,
The setting unit further includes at least one restraining tie whose ends are formed to surround a portion of the capillary pipes so that their outer peripheral surfaces are in close contact with each other so as to mutually restrain the capillary pipes inserted into the through hole.
Distribution pipe inspection device for air conditioners.