Blockage detection device for refrigerant pipe of air conditioner

Abstract

The invention provides an air conditioner refrigerant pipe blockage detection device, and belongs to the technical field of air conditioner detection.The air conditioner refrigerant pipe blockage detection device comprises a box body, a control assembly, a clamping assembly and a connecting assembly, the clamping assembly and the connecting assembly are used for being connected to the two ends of a refrigerant pipe in a sealed mode so that the refrigerant pipe can be connected with the device, and two pressure pipes are installed on the side wall of the box body; the connecting assembly is installed at one end of the pressure pipe, the clamping assembly is arranged on the outer wall of the connecting assembly and used for clamping the connecting assembly to the pipe wall of the refrigerant pipe, the connecting assembly comprises a connecting pipe, the clamping assembly clamps the connecting assembly to the pipe wall of the refrigerant pipe, and the two ends of the refrigerant pipe are directly connected to the device. The inert gas is pumped into the refrigerant pipe, so that the pressure and the flow at the two ports of the refrigerant pipe are changed, when the pressure and the flow at the two ports of the refrigerant pipe are not greatly different, the detected refrigerant pipe is not blocked, and blockage detection can be carried out on the refrigerant pipe without disassembling the refrigerant pipe.

Description

Technical Field

[0001] The invention belongs to the technical field of air-conditioning detection, and in particular relates to a device for detecting blockage of a refrigerant pipe of an air-conditioning. Background Art

[0002] Air conditioning refrigerant pipes are an important part of the air conditioning system, which include evaporator pipes, condenser pipes, compressor pipes, expansion valve pipes, return air pipes and liquid storage pipes, which circulate the refrigerant in the system and play a vital role in the cooling effect and operating stability of the air conditioner. They need to be checked regularly for blockages and leaks and maintained. Blockage of air conditioning refrigerant pipes is one of the problems that may be encountered in the operation of the air conditioning system. After the air conditioning refrigerant pipe is blocked, the pressure on the high-pressure side and the low-pressure side is significantly different from the normal value. The temperature difference between the pipes before and after the blockage is large, the system pressure is unbalanced, and the compressor may start and stop frequently or operate abnormally, resulting in a decrease in the cooling or heating effect of the air conditioner, or even complete failure.

[0003] A pipeline blockage detection device and detection method are disclosed in a Chinese patent application document with application publication number CN117847445A, which includes a load-bearing plate on which an ultrasonic detector is arranged; two engaging walking mechanisms are respectively arranged at two ends of the load-bearing plate, and the engaging walking mechanisms include two arc-shaped plates, one end of the two arc-shaped plates is symmetrically hinged on the load-bearing plate, and the other end is provided with a first travel wheel.

[0004] Existing pipeline blockage detection devices generally use ultrasonic waves to perform detection step by step along the pipeline. However, when detecting blockage of the air conditioner condenser pipe, since some refrigerant pipes are installed in the air conditioner outdoor unit and indoor unit, it is not convenient to disassemble them, so ultrasonic waves cannot be used for detection along the pipeline. Summary of the invention

[0005] The purpose of the present invention is to provide an air-conditioning refrigerant pipe blockage detection device, aiming to solve the problem that the pipeline blockage detection device in the prior art cannot gradually perform ultrasonic detection on the refrigerant pipes located in the air-conditioning outdoor unit and the indoor unit.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: an air conditioning refrigerant pipe blockage detection device, comprising a housing, a control component, a clamping component and a connecting component, wherein the clamping component and the connecting component are used to be sealed and connected to both ends of the refrigerant pipe to connect the refrigerant pipe to the device.

[0007] Two pressure pipes are installed on the side wall of the box body, the connecting assembly is installed on one end of the pressure pipe, and the clamping assembly is arranged on the outer wall of the connecting assembly for clamping the connecting assembly on the pipe wall of the refrigerant pipe.

[0008] The connecting assembly includes a connecting pipe, an open groove is provided on the pipe wall of the connecting pipe along the axial direction of the connecting pipe, and the upper connecting part and the lower connecting part are respectively installed on the two side walls of the open groove. The upper connecting part and the lower connecting part are both arc-shaped plates arranged concentrically with the connecting pipe. The inner wall of one end of the upper connecting part close to the lower connecting part is in conflict with the outer wall of the lower connecting part, and the clamping assembly clamps the connecting assembly on the pipe wall of the refrigerant pipe.

[0009] The effect is that the two ends of the refrigerant pipe are directly connected to the device through the connecting assembly, and the inert gas is pumped into the refrigerant pipe to change the pressure and flow at the two ends of the refrigerant pipe. When the pressure and flow at the two ends of the refrigerant pipe are not much different, it indicates that the refrigerant pipe being tested is not blocked, and the blockage detection can be carried out without disassembling the refrigerant pipe.

[0010] The connecting pipe, the upper connecting part and the lower connecting part are all made of elastic material. As the clamping assembly clamps the connecting assembly, the open groove of the connecting pipe begins to close under the action of the clamping force and drives the upper connecting part and the lower connecting part to move relative to each other along their circumferential direction, thereby reducing the diameter of the connecting pipe and clamping it on the wall of the refrigerant pipe.

[0011] The effect is that the open groove of the connecting pipe begins to close under the action of the clamping piece and drives the inner wall of the upper connecting part and the lower connecting part to move relative to each other along the circumferential direction, thereby reducing the diameter of the connecting pipe and clamping it on the wall of the refrigerant pipe, thereby ensuring the sealing of the refrigerant pipe when it is connected to the device, and further ensuring the accuracy of the blockage detection result.

[0012] The outer wall of the lower connecting part is provided with a limiting sliding groove along its circumference, and the inner wall of the upper connecting part is fixedly provided with a limiting sliding block which is slidably sleeved in the limiting sliding groove.

[0013] The effect is that, by providing the limiting slider and the limiting groove, it is avoided that when the opening groove of the connecting pipe is closed, there is a gap between the contact part of the upper connecting part and the lower connecting part, thereby affecting the sealing of the refrigerant pipe connection.

[0014] The clamping assembly includes a fixed tube, a rotating sleeve and a clamping mechanism. The inner wall of the fixed tube is provided with four mounting grooves along its circumference. The connecting tube is sleeved in the fixed tube and is concentric with the fixed tube. One of the mounting grooves corresponds to the junction of the upper connecting part and the lower connecting part. The clamping mechanism is arranged in the mounting groove for clamping the connecting tube. The rotating sleeve is rotatably sleeved on the outer wall of one end of the fixed tube to drive the clamping mechanism to move.

[0015] The clamping mechanism includes a bidirectional screw, a clamping slider, a clamping piece, a connecting piece, a hinge and a fixing piece. The bidirectional screw is rotatably installed in the mounting groove and the axis of the bidirectional screw is parallel to the axis of the fixing tube. There are two clamping sliders and they are respectively threadedly sleeved on the two ends of the bidirectional screw. There are two fixing pieces and they are respectively fixedly installed on the two ends of the fixing tube. There are two clamping pieces and one end of the two clamping pieces is respectively hinged to the two fixing pieces. There are two connecting pieces and one end of the two connecting pieces is respectively hinged to the two clamping sliders. The other ends of the two connecting pieces are respectively hinged to the middle parts of the two clamping pieces through hinges.

[0016] A gear is fixedly installed on one end of the bidirectional screw near the rotating sleeve, an annular groove is opened on the outer wall of one end of the fixed tube sleeve connected to the rotating sleeve, the installation groove is communicated with the annular groove, an inner gear ring is fixedly installed on the inner wall of the rotating sleeve and the rotating sleeve is connected in the annular groove, and the gear and the inner gear ring are meshed and connected with each other.

[0017] The effect is that it can seal and connect refrigerant pipes of various models, so that the device can seal and connect and detect refrigerant pipes of various models and different diameters in air conditioners, thereby improving the applicability of the device.

[0018] A connector is connected between one side of the clamping assembly and the outer wall of the pressure pipe, and is used to install the clamping assembly on the pressure pipe.

[0019] Two fixing columns are fixedly installed on the outer wall of the box body where the pressure pipe is installed, and two connecting pipes are respectively slidably sleeved on the two fixing columns.

[0020] The effect is that it prevents dust from entering the pressure pipe when the device is not in use, causing the pressure pipe to be blocked. At the same time, it prevents the dust in the pressure pipe from being discharged into the refrigerant pipe when the device is used for detection again, thereby affecting the detection accuracy.

[0021] Compared with the prior art, the present invention has the following beneficial effects: The two ends of the refrigerant pipe are directly connected to the device through the connecting assembly, and the inert gas is pumped into the refrigerant pipe to change the pressure and flow at the two ends of the refrigerant pipe. When the pressure and flow at the two ends of the refrigerant pipe are not much different, it indicates that the refrigerant pipe under test is not blocked, and the blockage detection can be carried out on the refrigerant pipe without disassembling it. At the same time, it can seal and connect a variety of different types of refrigerant pipes, so that the device can seal and connect and detect a variety of models of air conditioners and refrigerant pipes of different diameters in the air conditioners, thereby improving the applicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1It is a structural schematic diagram of the detection device in the present invention; Figure 2 It is a structural schematic diagram of the pipe nozzle connection mechanism in the present invention; Figure 3 It is a side cross-sectional schematic diagram of the pipe nozzle connection mechanism in the present invention; Figure 4 It is a structural schematic diagram of the connecting pipe and the clamping assembly in the present invention; Figure 5 It is a structural schematic diagram of the connecting portion of the connecting pipe in the present invention; Figure 6 It is a schematic front cross-sectional view of the clamping assembly in the present invention.

[0023] In the figure: 1. Box body; 11. Pressure pipe; 12. Connector; 2. Clamping assembly; 21. Fixed pipe; 211. Annular groove; 22. Rotating sleeve; 221. Inner gear ring; 23. Mounting groove; 24. Clamping mechanism; 241. Bidirectional screw; 242. Gear; 243. Clamping slider; 244. Clamping piece; 245. Connecting piece; 246. Hinge; 247. Fixed piece; 3. Connecting assembly; 31. Connecting pipe; 32. Upper connecting part; 33. Lower connecting part; 34. Limiting slide groove; 35. Limiting slider; 4. Control assembly. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1-Figure 6 The present invention provides the following technical solutions: an air-conditioning refrigerant pipe blockage detection device, comprising a box body 1, a clamping assembly 2, a connecting assembly 3 and a control assembly 4. The box body 1 is provided with a pressure sensor and a flow sensor for detection, and an air pump for pressing an inert gas into the refrigerant pipe. The clamping assembly 2 and the connecting assembly 3 are used to seal and connect the two ends of the refrigerant pipe to connect the refrigerant pipe to the device. The control assembly 4 is installed on the outer wall of the box body 1 and is used to control the device for detection.

[0026] refer to Figure 1-Figure 3As shown, two pressure pipes 11 are installed on the side wall of the box body 1 for connecting with the two ends of the refrigerant pipe, so as to pass the inert gas in the device into the refrigerant pipe. One end of the pressure pipe 11 is connected with a connecting component 3 for connecting with the refrigerant pipe, and the outer wall of the connecting component 3 is provided with a clamping component 2 for clamping the connecting component 3 on the pipe wall of the refrigerant pipe. A connector 12 is connected between one side of the clamping component 2 and the outer wall of the pressure pipe 11 for installing the clamping component 2 on the pressure pipe 11.

[0027] refer to Figure 3 and Figure 5 As shown, the connecting component 3 includes a connecting tube 31, an open groove is provided on the tube wall of the connecting tube 31 along the axial direction of the connecting tube 31, and the two side walls of the open groove are respectively installed with an upper connecting part 32 and a lower connecting part 33, and the upper connecting part 32 and the lower connecting part 33 are both arc-shaped plates arranged concentrically with the connecting tube 31, and the inner wall of one end of the upper connecting part 32 close to the lower connecting part 33 conflicts with the outer wall of the lower connecting part 33, and the connecting tube 31, the upper connecting part 32 and the lower connecting part 33 are all made of elastic material, and the clamping component 2 clamps the connecting component 3, so that the open groove of the connecting tube 31 begins to close under the action of the clamping force and drives the upper connecting part 32 and the lower connecting part 33 to move relative to each other along the circumferential direction, so that the diameter of the connecting tube 31 becomes smaller and is clamped on the tube wall of the refrigerant tube.

[0028] The outer wall of the lower connecting portion 33 is provided with a limiting sliding groove 34 along its circumference, and the inner wall of the upper connecting portion 32 is fixedly mounted with a limiting sliding block 35 which is slidably sleeved in the limiting sliding groove 34 .

[0029] The two connecting pipes 31 are removed from the two fixed columns, and are respectively sleeved on the outer walls of the two ends of the refrigerant pipe, and the connecting pipes 31 are clamped by the clamping assembly 2, so that the open groove of the connecting pipe 31 begins to close under the action of the clamping piece 244 and drives the inner wall of the upper connecting part 32 and the lower connecting part 33 to move relative to each other along their circumferential direction, so that the diameter of the connecting pipe 31 becomes smaller and is clamped on the pipe wall of the refrigerant pipe, and then the air pump is controlled by the control assembly 4 to pump inert gas into the refrigerant pipe. At the same time, the pressure sensor and the flow sensor begin to detect the pressure and flow changes at the two ports of the refrigerant pipe. When the pressure and flow at the two ports of the refrigerant pipe are not much different, it indicates that the refrigerant pipe being tested is not blocked, otherwise it is blocked.

[0030] refer to Figure 3 , Figure 4 and Figure 6As shown, the clamping assembly 2 includes a fixed tube 21, a rotating sleeve 22 and a clamping mechanism 24. The inner wall of the fixed tube 21 is provided with at least three mounting grooves 23 along its circumference, and preferably four in this embodiment. The connecting tube 31 is sleeved in the fixed tube 21 and is concentric with the fixed tube 21. One of the mounting grooves 23 corresponds to the junction of the upper connecting portion 32 and the lower connecting portion 33. The clamping mechanism 24 is arranged in the mounting groove 23 for clamping the connecting tube 31. The rotating sleeve 22 is rotatably sleeved on the outer wall of one end of the fixed tube 21 to drive the clamping mechanism 24 to move.

[0031] The clamping mechanism 24 includes a bidirectional screw 241, a clamping slider 243, a clamping piece 244, a connecting piece 245, a hinge 246 and a fixing piece 247. The bidirectional screw 241 is rotatably installed in the installation groove 23 and the axis of the bidirectional screw 241 is parallel to the axis of the fixing tube 21. There are two clamping sliders 243 and they are respectively threadedly sleeved on the two ends of the bidirectional screw 241. There are two fixing pieces 247 that are respectively fixedly installed on the two ends of the fixing tube 21. There are two clamping pieces 244 and one end of the two clamping pieces 244 is respectively hinged to the two fixing pieces 247. There are two connecting pieces 245 and one end of the two connecting pieces 245 is respectively hinged to the two clamping sliders 243. The other ends of the two connecting pieces 245 are respectively hinged to the middle parts of the two clamping pieces 244 through hinges 246.

[0032] A gear 242 is fixedly installed on one end of the bidirectional screw 241 close to the rotating sleeve 22, an annular groove 211 is provided on the outer wall of one end of the fixed tube 21 which is sleeved with the rotating sleeve 22, the mounting groove 23 is communicated with the annular groove 211, an inner gear ring 221 which is rotatably sleeved in the annular groove 211 is fixedly installed on the inner wall of the rotating sleeve 22, and the gear 242 and the inner gear ring 221 are meshed and connected with each other.

[0033] The rotating sleeve 22 is rotated to drive the inner gear ring 221 to rotate. Since the gear 242 is meshed with the inner gear ring 221, when the inner gear ring 221 rotates, the four gears 242 drive the four bidirectional screws 241 to rotate synchronously. As the bidirectional screws 241 rotate, the two clamping slide blocks 243 installed thereon move away from each other. Since one end of the clamping member 244 is hinged to the fixing member 247, one end of the connecting member 245 is hinged to the middle part of the clamping member 244, and the other end is hinged to the clamping slide block 243, as the two clamping slide blocks 243 move away from each other, the connecting member 245 will clamp the clamping member 244. One end of 244 is lifted up, so that the lifted end of the clamping pieces 244 on the four clamping mechanisms 24 squeezes the connecting pipe 31, so that the open groove of the connecting pipe 31 begins to close under the action of the clamping piece 244 and drives the inner wall of the upper connecting part 32 and the lower connecting part 33 to move relative to each other along their circumferential direction, thereby reducing the diameter of the connecting pipe 31 and clamping it on the wall of the refrigerant pipe. The device can seal and connect a variety of different types of refrigerant pipes, so that the device can seal and connect and detect a variety of types of air conditioners and refrigerant pipes of different diameters in the air conditioners, thereby improving the applicability of the device.

[0034] Two fixing columns are fixedly installed on the outer wall of the box body 1 on which the pressure tube 11 is installed, and the two connecting tubes 31 are slidably sleeved on the two fixing columns. After the detection is completed, the two ends of the refrigerant tube of the two connecting tubes 31 are removed and sleeved on the two fixing columns respectively, so as to avoid dust entering the pressure tube 11 when the device is not in use, causing the pressure tube 11 to be blocked, and at the same time, avoid the dust in the pressure tube 11 from being easily discharged into the refrigerant tube when the device is used for detection again, thereby affecting the detection accuracy.

[0035] The implementation principle of the embodiment of the present invention is as follows: when inspecting the refrigerant pipe, the two connecting pipes 31 are removed from the two fixed columns and respectively sleeved on the outer walls of the two ends of the refrigerant pipe, and the rotating sleeve 22 is rotated to drive the inner gear ring 221 to rotate. Since the gear 242 is meshed with the inner gear ring 221, when the inner gear ring 221 rotates, the four gears 242 drive the four bidirectional screws 241 to rotate synchronously. As the bidirectional screw 241 rotates, the two clamping sliders 243 installed thereon move away from each other. Since one end of the clamping member 244 is hinged to the fixing member 247, one end of the connecting member 245 is hinged to the middle part of the clamping member 244, and the other end is hinged to the clamping slider 243, as the two clamping sliders 243 move away from each other, the connecting member 245 lifts one end of the clamping member 244, so that the clamping members on the four clamping mechanisms 24 The raised end of the component 244 squeezes the connecting tube 31, so that the open groove of the connecting tube 31 begins to close under the action of the clamping component 244 and drives the upper connecting part 32 and the lower connecting part 33 to move relative to each other in the circumferential direction, so that the diameter of the connecting tube 31 becomes smaller and is clamped on the tube wall of the refrigerant tube. Then, the air pump is controlled by the control component 4 to pump the inert gas into the refrigerant tube. At the same time, the pressure sensor and the flow sensor begin to detect the pressure and flow changes at the two ends of the refrigerant tube. When the pressure and flow at the two ends of the refrigerant tube are not much different, it indicates that the refrigerant tube being tested is not blocked, otherwise it is blocked. At the same time, the device can seal and connect a variety of different types of refrigerant tubes, so that the device can seal and connect and detect a variety of types of air conditioners and refrigerant tubes of different diameters in the air conditioners, thereby improving the applicability of the device.

[0036] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An air-conditioning refrigerant pipe blockage detection device, comprising a housing (1) and a control component (4), characterized in that: It also includes a clamping assembly (2) and a connecting assembly (3), wherein the clamping assembly (2) and the connecting assembly (3) are used to be sealed and connected to both ends of the refrigerant pipe so that the refrigerant pipe is connected to the detection device; Two pressure pipes (11) are installed on the side wall of the box body (1), the connecting assembly (3) is installed on one end of the pressure pipe (11), and the clamping assembly (2) is arranged on the outer wall of the connecting assembly (3) and is used to clamp the connecting assembly (3) on the wall of the refrigerant pipe; The connection assembly (3) comprises a connection pipe (31), an open groove is provided on the pipe wall of the connection pipe (31) along the axial direction of the connection pipe (31), an upper connection part (32) and a lower connection part (33) are respectively installed on the two side walls of the open groove, the upper connection part (32) and the lower connection part (33) are both arc-shaped plates arranged concentrically with the connection pipe (31), the inner wall of one end of the upper connection part (32) close to the lower connection part (33) is in conflict with the outer wall of the lower connection part (33), and the clamping assembly (2) clamps the connection assembly (3) on the pipe wall of the refrigerant pipe.

2. The air conditioning refrigerant pipe blockage detection device according to claim 1, characterized in that: The connecting tube (31), the upper connecting portion (32) and the lower connecting portion (33) are all made of elastic material. As the clamping assembly (2) clamps the connecting assembly (3), the open groove of the connecting tube (31) begins to close under the action of the clamping force and drives the upper connecting portion (32) and the lower connecting portion (33) to move relative to each other in their circumferential direction, thereby reducing the diameter of the connecting tube (31) and clamping it on the wall of the refrigerant tube.

3. The air conditioning refrigerant pipe blockage detection device according to claim 2, characterized in that: The outer wall of the lower connecting portion (33) is provided with a limiting sliding groove (34) along its circumference, and the inner wall of the upper connecting portion (32) is fixedly mounted with a limiting sliding block (35) which is slidably sleeved in the limiting sliding groove (34).

4. The air conditioning refrigerant pipe blockage detection device according to claim 1, characterized in that: The clamping assembly (2) comprises a fixed tube (21), a rotating sleeve (22) and a clamping mechanism (24); the inner wall of the fixed tube (21) is provided with four mounting grooves (23) along its circumference; the connecting tube (31) is sleeved in the fixed tube (21) and is concentric with the fixed tube (21); one of the mounting grooves (23) corresponds to the junction of the upper connecting portion (32) and the lower connecting portion (33); the clamping mechanism (24) is arranged in the mounting groove (23) for clamping the connecting tube (31); the rotating sleeve (22) is rotatably sleeved on the outer wall of one end of the fixed tube (21) for driving the clamping mechanism (24) to move.

5. The air conditioning refrigerant pipe blockage detection device according to claim 4, characterized in that: The clamping mechanism (24) comprises a bidirectional screw (241), a clamping slider (243), a clamping piece (244), a connecting piece (245), a hinge (246) and a fixing piece (247). The bidirectional screw (241) is rotatably mounted in the mounting groove (23) and the axis of the bidirectional screw (241) is parallel to the axis of the fixing tube (21). There are two clamping sliders (243) and they are respectively threadedly sleeved on the two ends of the bidirectional screw (241). There are two fixing pieces (247) and they are respectively fixedly mounted on the two ends of the fixing tube (21). There are two clamping pieces (244) and one end of the two clamping pieces (244) is respectively hinged to the two fixing pieces (247). There are two connecting pieces (245) and one end of the two connecting pieces (245) is respectively hinged to the two clamping sliders (243). The other ends of the two connecting pieces (245) are respectively hinged to the middle parts of the two clamping pieces (244) through the hinge (246).

6. The air conditioning refrigerant pipe blockage detection device according to claim 5, characterized in that: A gear (242) is fixedly mounted on one end of the bidirectional screw (241) close to the rotating sleeve (22); an annular groove (211) is formed on the outer wall of one end of the fixed tube (21) sleeved with the rotating sleeve (22); the mounting groove (23) is communicated with the annular groove (211); an inner gear ring (221) rotatably sleeved in the annular groove (211) is fixedly mounted on the inner wall of the rotating sleeve (22); the gear (242) and the inner gear ring (221) are meshedly connected with each other.

7. The air conditioning refrigerant pipe blockage detection device according to claim 4, characterized in that: A connector (12) is connected between one side of the clamping assembly (2) and the outer wall of the pressure pipe (11), and is used to install the clamping assembly (2) on the pressure pipe (11).

8. The air conditioning refrigerant pipe blockage detection device according to claim 1, characterized in that: Two fixing columns are fixedly mounted on the outer wall of the box body (1) on which the pressure pipe (11) is mounted, and two connecting pipes (31) are respectively slidably sleeved on the two fixing columns.

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