Detection system for refrigerant leakage of air conditioner

Abstract

The utility model discloses a detection system for refrigerant leakage of an air conditioner, which comprises a detection box, an air exhaust piece, an air inflation piece, a separation piece and a refrigerant detection piece, and a detection cavity is arranged in the detection box; the air exhaust part is provided with an air inlet end and an air exhaust end, the air inlet end is communicated with the detection cavity, and the air exhaust part is used for vacuumizing the detection cavity; the inflation part is communicated with the detection cavity and can convey nitrogen to the detection cavity; the separation part communicates with the exhaust end and can separate nitrogen from the refrigerant and output the refrigerant; the refrigerant detection part communicates with the separation part and is used for detecting whether the separation part outputs the refrigerant or not. The problems that in the prior art, whether refrigerant leakage exists or not is measured in a blocking mode, the refrigerant leakage detection time is long, and the air conditioner overhaul period is affected are solved.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning detection technology, specifically to a detection system for air conditioning refrigerant leakage. Background Technology

[0002] With the progress of society and economic development, air conditioners, as an important electrical appliance in people's daily lives, have entered thousands of households. However, during the installation process and long-term use, the air conditioner's piping may be damaged due to poor sealing, bending, long-term corrosion, or other external uncontrollable factors, leading to refrigerant leakage. Fundamentally, refrigerant leakage manifests as a reduction in refrigerant flow. Insufficient refrigerant will reduce the air conditioner's performance, causing the compressor to operate under poor conditions, and in severe cases, even damaging the compressor.

[0003] In existing technologies, the method of measuring refrigerant leakage by sealing involves placing the air conditioner in a sealed space and observing changes in vacuum to determine the extent of the leak. However, when the amount of refrigerant leakage at the location of the air conditioner leak is small, it is difficult to determine the extent of the leak by observing changes in vacuum in a short period of time. The entire refrigerant leak detection process is time-consuming and affects the maintenance cycle of the air conditioner. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a detection system for refrigerant leakage in air conditioning systems. This system solves the problem that existing technologies use a sealing method to measure whether refrigerant is leaking, which results in a long refrigerant leakage detection process and affects the air conditioning maintenance cycle.

[0005] The problem is that testing the air conditioning unit takes a long time.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0007] This utility model provides a detection system for refrigerant leakage in air conditioning systems, including...

[0008] A testing box, wherein a testing chamber is provided inside the testing box;

[0009] A vacuum device has an air inlet end and an air outlet end, the air inlet end being connected to the detection chamber, and the vacuum device being used to evacuate the detection chamber.

[0010] An inflation component, which is connected to the detection chamber, is capable of supplying nitrogen gas into the detection chamber;

[0011] A separator, connected to the exhaust end, capable of separating nitrogen and refrigerant and outputting the refrigerant; and,

[0012] A refrigerant detection element, which is connected to the separator, is used to detect whether the separator is outputting refrigerant.

[0013] In some embodiments, the inflation component is a nitrogen generator, and a check valve is provided on the pipeline connecting the inflation component and the detection chamber.

[0014] In some embodiments, the separator includes a housing and a single-stage membrane layer. The housing has a vent end and an outlet end. The vent end is connected to the exhaust end, and the outlet end is connected to the refrigerant detection element. The single-stage membrane layer is installed inside the housing. Refrigerant entering the housing through the vent end can pass through the single-stage membrane layer and be output through the outlet end.

[0015] In some embodiments, the single-stage membrane is a polyimide membrane or a polysulfone membrane.

[0016] In some embodiments, the refrigerant detection device includes a cover and a refrigerant detector, wherein the air inlet of the cover is connected to the air outlet of the housing, and the probe of the refrigerant detector is inserted into the cover.

[0017] In some embodiments, a collection box is further included, which is connected to the air outlet of the cover and is used to collect refrigerant.

[0018] In some embodiments, the detection box is connected to a dark box door, which has a first state of closing the detection chamber and a second state of opening the detection chamber to form an opening. In the first state, the air conditioner can be closed inside the detection chamber, and in the second state, the air conditioner can enter and exit the detection chamber through the opening.

[0019] In some embodiments, a transparent observation window is nested on the dark box door.

[0020] In some embodiments, the bottom wall, side wall and top wall of the housing are provided with air ducts that communicate with the air inlet end of the air extraction component, and the air ducts are provided with a plurality of air extraction holes at intervals.

[0021] In some embodiments, a vacuum level detector is also included, which is connected to the detection chamber.

[0022] Compared with existing technologies, this utility model provides a detection system for air conditioning refrigerant leaks. The detection chamber contains a detection cavity, and the suction unit has an inlet and an outlet. The inlet is connected to the detection cavity, the inflation unit is connected to the detection cavity, the separator is connected to the outlet, and the refrigerant detection unit is connected to the separator. The suction unit evacuates the detection cavity, accelerating the leakage rate at the refrigerant leak location. The inflation unit delivers nitrogen to the detection cavity, restoring the pressure inside to standard atmospheric pressure. The suction unit then extracts the nitrogen-refrigerant mixture and delivers it to the separator. The separator separates the nitrogen and refrigerant and outputs the refrigerant. The refrigerant detection unit detects whether the separator is outputting refrigerant. This system effectively shortens the time required for air conditioning leak detection and improves the efficiency of air conditioning leak detection. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a detection system for air conditioning refrigerant leakage provided in an embodiment of this utility model;

[0024] Figure 2 This is a schematic diagram of the internal structure of the separator provided in this embodiment of the utility model. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.

[0026] To address the problem that existing technologies using sealing methods to measure refrigerant leaks are time-consuming and affect air conditioner maintenance cycles, this invention provides a refrigerant leak detection system for air conditioners. This system increases the leakage rate at the leak location, ensuring a faster detection of the leaked refrigerant volume and thus shortening the time required for leak detection.

[0027] Please see Figures 1-2 , Figures 1-2 This utility model discloses a detection system for air conditioning refrigerant leakage, comprising a detection box 1, an extraction component 2, an inflation component 3, a separation component 4, and a refrigerant detection component 5. The detection box 1 contains a detection chamber 1a. The extraction component 2 has an inlet end and two exhaust ends, the inlet end being connected to the detection chamber 1a, and the extraction component 2 is used to evacuate the detection chamber 1a. The inflation component 3 is connected to the detection chamber 1a and is capable of supplying nitrogen gas into the detection chamber 1a. The separation component 4 is connected to the exhaust ends and is capable of separating nitrogen gas and refrigerant gas and outputting refrigerant gas. The refrigerant detection component 5 is connected to the separation component 4 and is used to detect whether the separation component 4 is outputting refrigerant gas.

[0028] In actual use, air conditioner A is placed in the detection chamber 1, with a distance of 10cm between air conditioner A and the inner walls of the detection chamber 1a. The vacuum device 2 is turned on to create a vacuum in the detection chamber 1, stabilizing the vacuum level in the detection chamber 1a to -0.1 MPa before stopping the machine and maintaining the pressure for 30 minutes. Under negative pressure, the leakage rate of the refrigerant at the leak location is accelerated, and the leaked refrigerant diffuses into the detection chamber 1a. Then, nitrogen is supplied into the detection chamber 1a through the inflation device 3, restoring the pressure in the detection chamber 1a to standard atmospheric pressure, allowing the nitrogen to mix with the refrigerant in the detection chamber 1a. The vacuum device 2 is turned on again to pump the mixed gas in the detection chamber 1a to the separation device 4, which separates the refrigerant and nitrogen and delivers the refrigerant to the refrigerant detection device 5. The refrigerant detection device 5 is used to detect whether there is a refrigerant leak in the air conditioner.

[0029] In one embodiment, the exhaust end of the air extraction component 2 has a first exhaust pipe and a second exhaust pipe, and the first exhaust pipe is provided with a first control valve, and the second exhaust pipe is provided with a second control valve, wherein the second exhaust pipe is connected to the separator 4.

[0030] Specifically, when it is necessary to evacuate the detection chamber 1a, the second control valve can be closed first and the first control valve can be opened. After the vacuuming component 2 is started, the airflow in the detection chamber 1a can be discharged through the first exhaust pipe of the vacuuming component 2. When it is necessary to transport the nitrogen and refrigerant mixture in the detection chamber 1a to the separator 4, the first control valve can be closed first and the second control valve can be opened. After the vacuuming component 2 is started, the mixed airflow in the detection chamber 1a can be pumped to the separator 4.

[0031] It should be noted that, in one embodiment, the inflation component 3 is a nitrogen generator, and a check valve 31 is provided on the pipeline connecting the inflation component 3 and the detection chamber 1a; specifically, after the inflation component 3 is opened, nitrogen can be supplied into the detection chamber 1a, and the check valve 31 can prevent nitrogen from flowing back.

[0032] It should be noted that, in one embodiment, the separator 4 includes a housing 41 and a single-stage membrane layer 42. The housing 41 has a vent end and an outlet end. The vent end is connected to an exhaust end, and the outlet end is connected to the refrigerant detection element 5. The single-stage membrane layer 42 is installed inside the housing 41. The refrigerant entering the housing 41 through the vent end can pass through the single-stage membrane layer 42 and be output through the outlet end.

[0033] Specifically, the principle of single-stage membrane separation of nitrogen and refrigerant is mainly based on the selective permeation difference of gas molecules in the membrane material. The pore size of the single-stage membrane can effectively allow the refrigerant to pass through while blocking nitrogen, thereby achieving the separation of the two.

[0034] In one embodiment, the single-stage membrane layer 42 is a polyimide membrane; of course, in other embodiments, the single-stage membrane layer 42 may also be a polysulfone membrane.

[0035] It should be noted that, in one embodiment, the refrigerant detection device 5 includes a cover 51 and a refrigerant detector 52. The air inlet of the cover 51 is connected to the air outlet of the housing 41, and the probe of the refrigerant detector 52 is inserted inside the cover 51.

[0036] It is understandable that after the refrigerant passes through the single-stage membrane, it can enter the enclosure 51. After the probe of the refrigerant detector 52 detects the refrigerant, it can display the detection information. The refrigerant detector 52 is a commonly used device in the prior art, and will not be described in detail here.

[0037] In addition, to prevent refrigerant from leaking into the air and polluting the environment, a collection box 6 is specifically included. The collection box 6 is connected to the air outlet of the cover 51 and is used to collect the refrigerant.

[0038] It should be noted that, in one embodiment, the detection box 1 is connected to a dark box door, which has a first state of closing the detection chamber 1a and a second state of opening the detection chamber 1a to form an opening. In the first state, the air conditioner can be closed inside the detection chamber 1a, and in the second state, the air conditioner can enter and exit the detection chamber 1a through the opening.

[0039] Based on the above scheme, a transparent observation window is nested on the dark box door, and the bottom wall, side wall and top wall of the detection box 1 are all provided with air ducts that communicate with the air inlet end of the air extraction component 2, and the air ducts are provided with multiple air extraction holes at intervals, which can ensure that the overall vacuum degree in the detection chamber 1a remains balanced.

[0040] Based on the above scheme, a vacuum detector 7 is also included, which is connected to the detection chamber 1a. It should be noted that when testing the air conditioner, the second control valve can be closed first and the first control valve can be opened. After the suction device 2 is started, the airflow in the detection chamber 1a can be discharged through the first exhaust pipe of the suction device 2 until the vacuum degree in the detection chamber 1a stabilizes to -0.1Mpa and then the machine is stopped. When the refrigerant leakage of the air conditioner is large, the vacuum detector 7 can detect the change in the vacuum degree in the detection chamber 1a.

[0041] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A detection system for air conditioning refrigerant leakage, characterized in that, include A testing box, wherein a testing chamber is provided inside the testing box; A vacuum device has an air inlet end and an air outlet end, the air inlet end being connected to the detection chamber, and the vacuum device being used to evacuate the detection chamber. An inflation component, which is connected to the detection chamber, is capable of supplying nitrogen gas into the detection chamber; A separator, connected to the exhaust end, capable of separating nitrogen and refrigerant and outputting the refrigerant; and, A refrigerant detection element, which is connected to the separator, is used to detect whether the separator is outputting refrigerant.

2. The system for detecting a refrigerant leakage of an air conditioner according to claim 1, wherein The inflation component is a nitrogen generator, and a check valve is provided on the pipeline connecting the inflation component and the detection chamber.

3. The detection system for air conditioning refrigerant leakage according to claim 1, characterized in that, The separation component includes a housing and a single-stage membrane layer. The housing has an inlet end and an outlet end. The inlet end is connected to the outlet end, and the outlet end is connected to the refrigerant detection device. The single-stage membrane layer is installed inside the housing. Refrigerant entering the housing through the inlet end can pass through the single-stage membrane layer and be output through the outlet end.

4. The system for detecting a refrigerant leakage of an air conditioner according to claim 3, wherein The single-level membrane is a polyimide membrane or a polysulfone membrane.

5. The system for detecting a refrigerant leakage of an air conditioner according to claim 3, wherein The refrigerant detection device includes a cover and a refrigerant detector. The air inlet of the cover is connected to the air outlet of the housing, and the probe of the refrigerant detector is inserted into the cover.

6. The system for detecting a refrigerant leakage of an air conditioner according to claim 5, wherein It also includes a collection box, which is connected to the air outlet of the cover and is used to collect refrigerant.

7. The system for detecting a refrigerant leakage of an air conditioner according to claim 1, wherein The detection box is connected to a dark box door, which has a first state of closing the detection chamber and a second state of opening the detection chamber to form an opening. In the first state, the air conditioner can be closed inside the detection chamber, and in the second state, the air conditioner can enter and exit the detection chamber through the opening.

8. The system for detecting a refrigerant leakage of an air conditioner according to claim 7, wherein A transparent observation window is nested inside the dark box door.

9. The system for detecting a refrigerant leakage of an air conditioner according to claim 7, wherein The bottom wall, side wall and top wall of the test box are all provided with air ducts that communicate with the air inlet end of the air extraction component, and the air ducts are provided with multiple air extraction holes at intervals.

10. The system for detecting a refrigerant leakage of an air conditioner according to claim 1, wherein It also includes a vacuum level detector, which is connected to the detection chamber.

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