A capillary testing fixture

Abstract

This utility model discloses a capillary tube testing fixture, relating to the field of air conditioner technology, comprising a first flow guiding mechanism, a second flow guiding mechanism, and an opening and closing mechanism. The first flow guiding mechanism is used to simultaneously connect to the outdoor unit's shut-off valve and one end of several capillary tubes of different specifications, so that one end of several capillary tubes is connected to the outdoor unit's shut-off valve through the first flow guiding mechanism. The second flow guiding mechanism is used to simultaneously connect to the indoor and outdoor unit connecting pipe assembly and the other end of several capillary tubes of different specifications, so that the other end of several capillary tubes is connected to the indoor and outdoor unit connecting pipe assembly through the second flow guiding mechanism. The opening and closing mechanism is used to independently control the on / off state of several capillary tubes, enabling the remaining capillary tubes to be in a blocked state when one capillary tube is in a conducting state. This capillary tube testing fixture eliminates the need to shut down the air conditioning system when replacing test capillary tubes, avoiding interruptions in the testing process and significantly reducing testing time, thus improving the efficiency of capillary tube matching tests.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, and in particular to a capillary testing fixture. Background Technology

[0002] In the research and development of air conditioning products, capillary tube matching testing is a crucial step in ensuring the stable cooling and heating performance of the air conditioning system. The test results directly affect the energy efficiency and operational reliability of the air conditioning system. In existing technology, testers connect both ends of the capillary tube to the outdoor unit's shut-off valve and the indoor / outdoor unit connecting pipe assembly, respectively, to establish connectivity between the capillary tube and the air conditioning system, thus enabling various capillary tube performance matching tests. However, in practice, when different specifications of capillary tubes need to be replaced according to testing requirements, to prevent refrigerant leakage during the replacement process, testers must first completely close the outdoor unit's shut-off valve and the indoor / outdoor unit connecting pipe assembly connected to both ends of the capillary tube before disassembling and replacing it. During capillary tube replacement, because the outdoor unit's shut-off valve and the indoor / outdoor unit connecting pipe assembly are closed, the refrigerant inside the air conditioning system cannot circulate normally. If the air conditioning system remains on at this time, the compressor will face the risk of overheating and damage due to lack of refrigerant cooling and lubrication. Therefore, the entire air conditioning system must be shut down before capillary tube replacement can be performed. Shutting down the entire air conditioning system not only interrupted the testing process, but also required the testing personnel to restart the air conditioning system and wait for it to stabilize after replacing the capillary tube. This significantly increased the testing time and reduced the testing efficiency of capillary tube product system matching. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a capillary testing fixture, which is beneficial to improving the efficiency of capillary matching tests.

[0004] According to an embodiment of the present invention, a capillary testing fixture includes a first flow guiding mechanism for simultaneously connecting to an outdoor unit shut-off valve and one end of several capillary tubes of different specifications, so that one end of several capillary tubes is connected to the outdoor unit shut-off valve through the first flow guiding mechanism; a second flow guiding mechanism for simultaneously connecting to an indoor / outdoor unit connecting pipe assembly and the other end of several capillary tubes of different specifications, so that the other end of several capillary tubes is connected to the indoor / outdoor unit connecting pipe assembly through the second flow guiding mechanism; and an opening / closing mechanism for independently controlling the on / off state of several capillary tubes, wherein the opening / closing mechanism can connect only one capillary tube to the outdoor unit shut-off valve and the indoor / outdoor unit connecting pipe assembly.

[0005] It has at least the following beneficial effects: When performing a performance matching test on capillary tubes, the tester first connects one end of several capillary tubes of different specifications to the first flow guiding mechanism, enabling all capillary tubes to connect to the outdoor unit's shut-off valve via the first flow guiding mechanism. Simultaneously, the other ends of these capillary tubes are connected to the second flow guiding mechanism, enabling all capillary tubes to connect to the indoor / outdoor unit connecting pipe assembly via the second flow guiding mechanism. Next, the tester operates the opening and closing mechanism, adjusting the capillary tube of the required test specification to a conducting state while simultaneously closing all other capillary tubes, and then starts the air conditioning system. During the test, refrigerant flows from the outdoor unit's shut-off valve into the first flow guiding mechanism. Because the first flow guiding mechanism only connects to the capillary tube in the conducting state, and the remaining capillary tubes are in the closed state, the refrigerant can only flow into the conducting capillary tube through the first flow guiding mechanism. Inside the capillary tube, the refrigerant flows and exits from the other end, entering the second guiding mechanism connected to the capillary tube. Finally, it flows into the indoor / outdoor unit connecting pipe assembly through the second guiding mechanism to complete the refrigerant circulation. When testing capillary tubes of different specifications, there is no need to shut down the air conditioning system. Simply operate the opening and closing mechanism to cut off the capillary tube currently in the conducting state, while simultaneously making the capillary tube of the new specification to be tested in the conducting state, while keeping the other specifications of capillary tubes blocked. This allows switching to the testing of the new specification of capillary tube. The first and second guiding mechanisms in this capillary tube testing fixture enable simultaneous connection of several capillary tubes to the outdoor unit shut-off valve and the indoor / outdoor unit connecting pipe assembly. Combined with the opening and closing mechanism for independent on / off control of a single capillary tube, the air conditioning system does not need to be shut down when changing test capillary tubes, avoiding interruption of the testing process and significantly reducing testing time, which is beneficial to improving the efficiency of capillary tube matching testing.

[0006] According to the capillary testing fixture of this utility model embodiment, the first flow guiding mechanism includes a first conduit and a plurality of second conduits. One end of the first conduit is used to communicate with the outdoor unit shut-off valve, and the other end of the first conduit is connected to one end of a plurality of second conduits. The other ends of the plurality of second conduits are respectively used to communicate with one end of a plurality of capillaries. Both the first conduit and the second conduits are used to supply refrigerant flow.

[0007] According to the capillary testing fixture of this utility model embodiment, the first flow guiding mechanism further includes a first pipe connector, and one end of the first conduit is connected to the outdoor unit shut-off valve through the first pipe connector.

[0008] According to the capillary testing fixture of this utility model embodiment, the first flow guiding mechanism further includes a first transfer pipe fitting, which is used to supply refrigerant flow. The first transfer pipe fitting has a first main pipe port and a plurality of first auxiliary pipe ports. The first main pipe port is connected to the other end of the first conduit, and the plurality of first auxiliary pipe ports are respectively connected to one end of a plurality of second conduits.

[0009] According to the capillary testing fixture of this utility model embodiment, the first guiding mechanism includes two second conduits, the first adapter is a first tee fitting, the first tee fitting has a first main pipe port and two first auxiliary pipe ports, and the two first auxiliary pipe ports are respectively connected to one end of the two second conduits.

[0010] According to the capillary testing fixture of this utility model embodiment, the second flow guiding mechanism includes a third conduit and a plurality of fourth conduits. One end of the third conduit is used to communicate with the connecting pipe group of the indoor and outdoor units, and the other end of the third conduit is connected to one end of the plurality of fourth conduits. The other ends of the plurality of fourth conduits are respectively used to communicate with the other ends of the plurality of capillaries. Both the third conduit and the fourth conduits are used to supply refrigerant flow.

[0011] According to the capillary testing fixture of this utility model embodiment, the second flow guiding mechanism further includes a second pipe connector, and one end of the third conduit is connected to the internal and external machine connecting pipe group through the second pipe connector.

[0012] According to the capillary testing fixture of this utility model embodiment, the second flow guiding mechanism further includes a second transfer pipe fitting, which is used to supply refrigerant flow. The second transfer pipe fitting has a second main pipe port and a plurality of second auxiliary pipe ports. The second main pipe port is connected to the other end of the third conduit, and the plurality of second auxiliary pipe ports are respectively connected to one end of the plurality of fourth conduits.

[0013] According to the capillary testing fixture of this utility model embodiment, the second flow guiding mechanism includes two fourth conduits, the second adapter is a second tee fitting, the second tee fitting has a second main port and two second auxiliary ports, and the two second auxiliary ports are respectively connected to one end of the two fourth conduits.

[0014] According to the capillary testing fixture of this utility model embodiment, the opening and closing mechanism includes a plurality of first shut-off valves and a plurality of second shut-off valves. One end of each of the plurality of first shut-off valves is connected to the first flow guiding mechanism, and the other end of each of the plurality of first shut-off valves is respectively used to connect to one end of a plurality of capillaries. One end of each of the plurality of second shut-off valves is connected to the second flow guiding mechanism, and the other end of each of the plurality of second shut-off valves is respectively used to connect to the other end of a plurality of capillaries.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the capillary testing fixture according to an embodiment of the present invention; Figure 2 This is a schematic diagram of a capillary testing fixture and several capillary tubes. Figure 3 This is a schematic diagram of the first flow guiding mechanism in another embodiment; Icon labels: First diversion mechanism 100; first conduit 110; second conduit 120; first pipe connector 130; first adapter fitting 140; first main pipe 150; first branch pipe 160; first branch pipe 170; Second flow guiding mechanism 200; Third conduit 210; Fourth conduit 220; Second pipe connector 230; Second adapter fitting 240; Opening and closing mechanism 300; first shut-off valve 310; second shut-off valve 320; Capillary 10. Detailed Implementation

[0017] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.

[0019] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0020] refer to Figure 1 and Figure 2This utility model discloses a capillary testing fixture, including a first flow guiding mechanism 100, a second flow guiding mechanism 200, and an opening and closing mechanism 300. The first flow guiding mechanism 100 is used to simultaneously connect with the outdoor unit shut-off valve and one end of several capillary tubes 10 of different specifications, so that one end of several capillary tubes 10 is connected to the outdoor unit shut-off valve through the first flow guiding mechanism 100; the second flow guiding mechanism 200 is used to simultaneously connect with the indoor and outdoor unit connecting pipe assembly and the other end of several capillary tubes 10 of different specifications, so that the other end of several capillary tubes 10 is connected to the indoor and outdoor unit connecting pipe assembly through the second flow guiding mechanism 200; the opening and closing mechanism 300 is used to independently control the opening and closing of several capillary tubes 10, and the opening and closing mechanism 300 can connect only one capillary tube 10 to the outdoor unit shut-off valve and the indoor and outdoor unit connecting pipe assembly, while the remaining capillary tubes 10 are disconnected from the outdoor unit shut-off valve and the indoor and outdoor unit connecting pipe assembly.

[0021] Understandably, when the performance of capillary tube 10 needs to be matched, the tester first connects one end of several capillary tubes 10 of different specifications to the first flow guiding mechanism 100, so that one end of all capillary tubes 10 is connected to the outdoor unit shut-off valve through the first flow guiding mechanism 100. Simultaneously, the other end of several capillary tubes 10 of different specifications is connected to the second flow guiding mechanism 200, so that the other end of all capillary tubes 10 is connected to the indoor / outdoor unit connecting pipe assembly through the second flow guiding mechanism 200. Then, the tester operates the opening / closing mechanism 300, according to the current... The capillary tube 10 of the required specification is controlled to be in a conducting state, meaning that the capillary tube 10 is connected to the outdoor unit shut-off valve and the indoor / outdoor unit connecting pipe assembly. Simultaneously, all other capillary tubes 10 are controlled to be in a blocking state, meaning that all other capillary tubes 10 are disconnected from the outdoor unit shut-off valve and the indoor / outdoor unit connecting pipe assembly, and the air conditioning system is started. During the test, the refrigerant flows out from the outdoor unit shut-off valve and enters the first flow guiding mechanism 100. Because the first flow guiding mechanism 100 is only connected to one end of the capillary tube 10 in the conducting state, and the other capillary tubes 10 are in a blocking state... In the blocked state, the refrigerant can only flow into the capillary tube 10, which is in the open state, through the first flow guiding mechanism 100. The refrigerant then flows within the capillary tube 10 and exits from the other end, entering the second flow guiding mechanism 200 connected to the capillary tube 10. Finally, it flows into the indoor / outdoor unit connecting pipe assembly through the second flow guiding mechanism 200, completing the refrigerant circulation. When testing a capillary tube 10 of a different specification, there is no need to shut down the air conditioning system. The opening / closing mechanism 300 is directly operated to control the currently open capillary tube 10 to the blocked state, while simultaneously opening the new specification capillary tube to be tested. When capillary tube 10 is controlled to be in a conductive state, while other capillary tubes 10 of different specifications remain blocked, the test can be switched to the new specification capillary tube 10. The first flow guiding mechanism 100 and the second flow guiding mechanism 200 in the capillary tube testing fixture can simultaneously connect several capillary tubes 10 with the outdoor unit shut-off valve and the indoor and outdoor unit connecting pipe group. With the cooperation of the opening and closing mechanism 300, the independent on and off control of a single capillary tube 10 is achieved. The air conditioning system does not need to be shut down when replacing the test capillary tube 10, thus avoiding the interruption of the test process and significantly reducing the test time, which is conducive to improving the efficiency of capillary tube 10 matching test.

[0022] It needs further explanation that when switching to a different specification of capillary tube 10, it is not necessary to shut down the air conditioning system. Simply use the opening and closing mechanism 300 to first block the currently tested capillary tube 10, cutting off the refrigerant flow within it, while simultaneously opening the next capillary tube 10 to be tested. This allows the refrigerant to quickly switch from the original capillary tube 10 to the new one. During this switching process, the outdoor unit shut-off valve and the indoor / outdoor unit connecting pipe assembly remain open, allowing the refrigerant inside the air conditioning system to continuously circulate through the newly opened capillary tube 10. This capillary tube testing fixture eliminates the need to shut down the air conditioning system or require personnel to disassemble or replace the capillary tubes 10, enabling rapid performance matching tests of different specifications of capillary tubes 10. This significantly reduces testing time and improves the testing efficiency of the capillary tubes 10. In this embodiment of the utility model, the refrigerant in the air conditioning system can first flow into the second flow guiding mechanism 200 through the indoor and outdoor unit connecting pipe group, and then flow into the outdoor unit shut-off valve through the second flow guiding mechanism 200, capillary tube 10 and the first flow guiding mechanism 100. The above two refrigerant flow directions are applicable to different modes of the air conditioning system, and will not be further described here.

[0023] refer to Figure 1 and Figure 2The first flow guiding mechanism 100 includes a first conduit 110 and a plurality of second conduits 120. One end of the first conduit 110 is connected to the outdoor unit shut-off valve, and the other end of the first conduit 110 is connected to one end of a plurality of second conduits 120. The other ends of the plurality of second conduits 120 are respectively connected to one end of a plurality of capillary tubes 10. Both the first conduit 110 and the second conduit 120 are used to supply refrigerant flow. The second flow guiding mechanism 200 includes a third conduit 210 and a plurality of fourth conduits 220. One end of the third conduit 210 is connected to the indoor and outdoor unit connecting pipe assembly, and the other end of the third conduit 210 is connected to one end of a plurality of fourth conduits 220. The other ends of the plurality of fourth conduits 220 are respectively connected to the other ends of a plurality of capillary tubes 10. Both the third conduit 210 and the fourth conduits 220 are used to supply refrigerant flow. Understandably, during the test, the refrigerant first flows out from the outdoor unit shut-off valve of the air conditioning system and enters the first conduit 110 in the first guide mechanism 100, which is used to connect with the outdoor unit shut-off valve. Since the other end of the first conduit 110 is connected to one end of several second conduits 120, the refrigerant in the first conduit 110 flows into the second conduit 120. Under the control of the opening and closing mechanism 300, the refrigerant in the second conduit 120 connected to the capillary 10 in the conducting state flows into the capillary 10 in the conducting state. Subsequently, the refrigerant in the capillary 10 flows into the fourth conduit 220 connected to it. The refrigerant in the fourth conduit 220 flows into the third conduit 210, and finally the refrigerant in the third conduit 210 flows into the indoor and outdoor unit connecting pipe assembly, completing the entire refrigerant circulation. In this utility model, the first conduit 110, the second conduit 120, the third conduit 210, and the fourth conduit 220 are all common copper pipes.

[0024] refer to Figure 1 The first flow guiding mechanism 100 further includes a first pipe connector 130, one end of the first conduit 110 being connected to the outdoor unit's shut-off valve via the first pipe connector 130. The second flow guiding mechanism 200 further includes a second pipe connector 230, one end of the third conduit 210 being connected to the indoor / outdoor unit connecting pipe assembly via the second pipe connector 230. It can be understood that one end of the first conduit 110 is connected to the outdoor unit's shut-off valve via the first pipe connector 130, thus connecting one end of the first conduit 110 to the outdoor unit's shut-off valve; one end of the third conduit 210 is connected to the indoor / outdoor unit connecting pipe assembly via the second pipe connector 230, thus connecting one end of the third conduit 210 to the indoor / outdoor unit connecting pipe assembly. In this utility model, both the first pipe connector 130 and the second pipe connector 230 can be common pipe fitting nuts.

[0025] refer to Figure 1The first flow guiding mechanism 100 further includes a first transfer pipe 140, which is used to supply refrigerant flow. The first transfer pipe 140 has a first main pipe port and a plurality of first auxiliary pipe ports. The first main pipe port is connected to the other end of the first conduit 110, and the plurality of first auxiliary pipe ports are respectively connected to one end of a plurality of second conduits 120. The second flow guiding mechanism 200 further includes a second transfer pipe 240, which is used to supply refrigerant flow. The second transfer pipe 240 has a second main pipe port and a plurality of second auxiliary pipe ports. The second main pipe port is connected to the other end of the third conduit 210, and the plurality of second auxiliary pipe ports are respectively connected to one end of a plurality of fourth conduits 220. Understandably, the other end of the first conduit 110 is connected to the first main pipe port of the first adapter fitting 140, so that the first conduit 110 and the first adapter fitting 140 are connected; one end of each of the second conduits 120 is connected to one of the first auxiliary pipe ports of the first adapter fitting 140, so that the second conduits 120 and the first adapter fitting 140 are connected; and the first conduit 110 is connected to the second conduits 120 through the first adapter fitting 140. The other end of the third conduit 210 is connected to the second main pipe port of the second adapter fitting 240, so that the third conduit 210 and the second adapter fitting 240 are connected; one end of each of the fourth conduits 220 is connected to one of the second auxiliary pipe ports of the second adapter fitting 240, so that the fourth conduits 220 and the second adapter fitting 240 are connected; and the third conduit 210 is connected to the fourth conduits 220 through the second adapter fitting 240.

[0026] During the test, after the refrigerant flows out from the outdoor unit's shut-off valve, it enters the first conduit 110 through the first pipe connector 130. Then, the refrigerant enters the first main pipe port of the first adapter fitting 140. Inside the first adapter fitting 140, the refrigerant is distributed from the first main pipe port to several first auxiliary pipe ports, allowing the refrigerant inside the first adapter fitting 140 to flow into several second conduits 120 through these auxiliary pipe ports. Under the control of the opening and closing mechanism 300, the refrigerant in the second conduit 120 connected to the capillary tube 10 in the conducting state flows into the capillary tube 10. Subsequently, the refrigerant in the capillary tube 10 flows into the fourth conduit 220 connected to it. The refrigerant in the fourth conduit 220 flows into the second adapter fitting 240 through the second auxiliary pipe port. Then, the refrigerant in the second adapter fitting 240 flows into the third conduit 210 through the second main pipe port. Finally, the refrigerant in the third conduit 210 flows into the indoor / outdoor unit connecting pipe assembly, completing the entire refrigerant circulation.

[0027] As another embodiment of this utility model, refer to Figure 3The first adapter fitting 140 includes a first main pipe 150, a first branch pipe 160, and a plurality of first branch pipes 170. One end of the first main pipe 150 is connected to the other end of the first conduit 110, so that the first main pipe 150 and the first conduit 110 are in communication. One end of the first main pipe 150 is the first main pipe port. The other end of the first main pipe 150 is connected to the first branch pipe 160, so that the first main pipe 150 and the first branch pipe 160 are in communication. One end of each of the plurality of first branch pipes 170 is connected to the first branch pipe 160, so that each of the plurality of first branch pipes 170 is in communication with the first branch pipe 160. The other end of each of the plurality of first branch pipes 170 is connected to one end of each of the plurality of second conduits 120, so that each of the plurality of first branch pipes 170 is in communication with each of the plurality of second conduits 120. The other end of the first branch pipe 170 is the first auxiliary pipe port. The structure of the second adapter fitting 240 is the same as that of the first adapter fitting 140, and will not be described further here.

[0028] In this utility model, reference Figure 1 The first flow guiding mechanism 100 includes two second conduits 120, and the first adapter fitting 140 is a first tee fitting. The first tee fitting has a first main pipe port and two first auxiliary pipe ports, which are respectively connected to one end of the two second conduits 120. The second flow guiding mechanism 200 includes two fourth conduits 220, and the second adapter fitting 240 is a second tee fitting. The second tee fitting has a second main pipe port and two second auxiliary pipe ports, which are respectively connected to one end of the two fourth conduits 220. It is understood that tee fittings are common pipe connection fittings, including one main pipe port and two auxiliary pipe ports, and are commonly used for the confluence and diversion of refrigerant in pipelines; further details will not be provided here.

[0029] refer to Figure 1 and Figure 2The opening and closing mechanism 300 includes a plurality of first shut-off valves 310 and a plurality of second shut-off valves 320. One end of each of the plurality of first shut-off valves 310 is connected to the first flow guiding mechanism 100, and the other end of each of the plurality of first shut-off valves 310 is used to connect to one end of each of the plurality of capillary tubes 10. One end of each of the plurality of second shut-off valves 320 is connected to the second flow guiding mechanism 200, and the other end of each of the plurality of second shut-off valves 320 is used to connect to the other end of each of the plurality of capillary tubes 10. Understandably, when matching tests are required for capillary tubes 10 of different specifications, the tester first connects one end of several capillary tubes 10 of different specifications to the other end of several first shut-off valves 310, and simultaneously connects the other end of several capillary tubes 10 to the other end of several second shut-off valves 320, thus completing the assembly of several capillary tubes 10. Before testing, all first shut-off valves 310 and second shut-off valves 320 are closed. A capillary tube 10 of the specified specification to be tested is selected according to the testing requirements. The first shut-off valves 310 and second shut-off valves 320 connected to both ends of this capillary tube 10 are opened, while ensuring that the first shut-off valves 310 and second shut-off valves 320 corresponding to the remaining capillary tubes 10 are closed, allowing the air conditioning system to enter the testing phase after startup. During the testing process, the refrigerant flows through external... The refrigerant enters the first flow guiding mechanism 100 through the shut-off valve 310, and then flows into the capillary tube 10 to be tested through the already opened first shut-off valve 310. The refrigerant in the capillary tube 10 flows into the second flow guiding mechanism 200 through the corresponding second shut-off valve 320, and finally through the indoor and outdoor unit connecting pipe assembly, realizing the stable circulation of refrigerant in the capillary tube 10 and the air conditioning system. When it is necessary to test a capillary tube 10 of a different specification, it is not necessary to shut down the air conditioning system. Simply close the first shut-off valves 310 and 320 at both ends of the currently conducting capillary tube 10 to block the refrigerant flow in that capillary tube 10, and at the same time open the corresponding first shut-off valves 310 and 320 at both ends of the other capillary tube 10 to be tested, so that the refrigerant switches to circulate in the new capillary tube 10, and the performance test of the capillary tube 10 of that specification can begin. The first shut-off valves 310 and 320 are common valve bodies in the air conditioning industry, and will not be described in detail here.

[0030] refer to Figure 1 and Figure 2In a preferred embodiment of this utility model, the opening and closing mechanism 300 includes two first shut-off valves 310 and two second shut-off valves 320. The first guiding mechanism 100 includes a first pipe connector 130, a first conduit 110, a first tee fitting, and two second conduits 120. The first pipe connector 130 is disposed on one end of the first conduit 110, and the other end of the first conduit 110 is connected to the first main pipe port of the first tee fitting. The two first auxiliary pipe ports of the first tee fitting are respectively connected to one end of the two second conduits 120. The other end is connected to one end of each of the two first shut-off valves 310; the second flow guiding mechanism 200 includes a second pipe joint 230, a third conduit 210, a second tee fitting and two fourth conduits 220. The second pipe joint 230 is disposed on one end of the third conduit 210. The other end of the third conduit 210 is connected to the second main pipe port of the second tee fitting. The two second auxiliary pipe ports of the second tee fitting are respectively connected to one end of each of the two fourth conduits 220. The other ends of each of the two fourth conduits 220 are connected to one end of each of the two second shut-off valves 320.

[0031] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0032] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A capillary test fixture, characterized by, include: The first flow guiding mechanism (100) is used to simultaneously connect with one end of the outdoor unit shut-off valve and one end of several capillary tubes (10) of different specifications, so that one end of several capillary tubes (10) is connected to the outdoor unit shut-off valve through the first flow guiding mechanism (100). The second flow guiding mechanism (200) is used to connect with the other end of the connecting pipe group of the indoor and outdoor units and several capillary tubes (10) of different specifications at the same time, so that the other end of several capillary tubes (10) can be connected with the connecting pipe group of the indoor and outdoor units through the second flow guiding mechanism (200); An opening and closing mechanism (300) is used to independently control the opening and closing of several capillary tubes (10). The opening and closing mechanism (300) can connect only one of the capillary tubes (10) to the outdoor unit shut-off valve and the indoor and outdoor unit connecting pipe assembly.

2. The capillary testing fixture according to claim 1, characterized in that: The first flow guiding mechanism (100) includes a first conduit (110) and a plurality of second conduits (120). One end of the first conduit (110) is used to connect with the outdoor unit shut-off valve, and the other end of the first conduit (110) is connected with one end of a plurality of second conduits (120). The other ends of the plurality of second conduits (120) are respectively used to connect with one end of a plurality of capillary tubes (10). Both the first conduit (110) and the second conduits (120) are used to supply refrigerant flow.

3. The capillary test fixture of claim 2, wherein: The first flow guiding mechanism (100) also includes a first pipe connector (130), one end of the first conduit (110) is connected to the outdoor unit shut-off valve through the first pipe connector (130).

4. The capillary test fixture of claim 2, wherein: The first flow guiding mechanism (100) further includes a first transfer pipe (140) for supplying refrigerant flow. The first transfer pipe (140) has a first main pipe port and a plurality of first auxiliary pipe ports. The first main pipe port is connected to the other end of the first conduit (110), and the plurality of first auxiliary pipe ports are respectively connected to one end of a plurality of second conduits (120).

5. The capillary test fixture of claim 4, wherein: The first diversion mechanism (100) includes two second conduits (120), and the first transfer fitting (140) is a first tee fitting. The first tee fitting has a first main pipe port and two first auxiliary pipe ports, and the two first auxiliary pipe ports are respectively connected to one end of the two second conduits (120).

6. The capillary test fixture of claim 1, wherein: The second flow guiding mechanism (200) includes a third conduit (210) and several fourth conduits (220). One end of the third conduit (210) is used to connect with the indoor and outdoor unit connecting pipe group, and the other end of the third conduit (210) is connected with one end of several fourth conduits (220). The other ends of several fourth conduits (220) are respectively used to connect with the other ends of several capillary tubes (10). Both the third conduit (210) and the fourth conduits (220) are used to supply refrigerant flow.

7. The capillary test fixture of claim 6, wherein: The second flow guiding mechanism (200) also includes a second pipe connector (230), one end of the third conduit (210) is connected to the indoor and outdoor unit connecting pipe assembly through the second pipe connector (230).

8. The capillary test fixture of claim 6, wherein: The second flow guide mechanism (200) further comprises a second adapter pipe (240) for refrigerant flow, the second adapter pipe (240) having a second main pipe port and a plurality of second auxiliary pipe ports, the second main pipe port being in communication with the other end of the third conduit (210), and the plurality of second auxiliary pipe ports being in communication with one end of the plurality of fourth conduits (220) respectively.

9. The capillary test fixture of claim 8, wherein: The second flow guide mechanism (200) comprises two fourth conduits (220), and the second adapter pipe (240) is a second three-way pipe, the second three-way pipe having the second main pipe port and two second auxiliary pipe ports, the two second auxiliary pipe ports being in communication with one end of the two fourth conduits (220) respectively.

10. The capillary test fixture of claim 1, wherein: The opening and closing mechanism (300) comprises a plurality of first stop valves (310) and a plurality of second stop valves (320), one end of the plurality of first stop valves (310) being in communication with the first flow guide mechanism (100), the other end of the plurality of first stop valves (310) being used for being in communication with one end of the plurality of capillary tubes (10) respectively, one end of the plurality of second stop valves (320) being in communication with the second flow guide mechanism (200), and the other end of the plurality of second stop valves (320) being used for being in communication with the other end of the plurality of capillary tubes (10) respectively.

Images