Refrigerant leakage detection system and refrigerator cabinet

Abstract

The refrigerant leakage detection system comprises a refrigeration module, a flow control valve, an infrared camera and a sensor assembly, the refrigeration module comprises a compressor, a condenser and an evaporator, and the compressor, the condenser and the evaporator are sequentially communicated to form a circulation loop; the flow control valve is installed on the circulation loop and used for controlling on / off of the circulation loop. The infrared camera and the condenser are correspondingly arranged, and the infrared camera can shoot the condenser and generate an infrared heat map; the sensor assembly is used for detecting the working state of the refrigeration module and generating detection data. According to the refrigerant leakage detection system, whether the circulation loop leaks or not can be preliminarily judged by using the infrared thermogram shot and generated by the infrared camera, and whether the circulation loop leaks or not can be accurately judged by using the detection data detected and generated by the sensor assembly, so that whether the circulation loop leaks or not can be detected; and the method is also suitable for on-line detection in a production line, and the detection accuracy is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to refrigerant leakage detection related technical field, especially, a kind of refrigerant leakage detection system and refrigerator cabinet are related to. BACKGROUND

[0002] At present, the existing small household refrigerator cabinet generally lacks effective leakage detection mechanism, refrigerant leakage occurs once, not only affect the refrigeration effect of small household refrigerator cabinet, but also can cause harm to environment and user health. Therefore, it is particularly important to develop a kind of detection system that can monitor and warn refrigerant leakage in real time. UTILITY MODEL CONTENTS

[0003] Therefore, it is necessary to provide a refrigerant leakage detection system and refrigerator cabinet for solving the above technical problems.

[0004] A kind of refrigerant leakage detection system, refrigerant leakage detection system includes:

[0005] Refrigeration module, including compressor, condenser and evaporator, the compressor, the condenser and the evaporator are sequentially communicated and form circulation loop;

[0006] Flow control valve, installed on the circulation loop, for controlling the on / off of the circulation loop;

[0007] Infrared camera, with the condenser is correspondingly arranged, and the infrared camera can photograph the condenser and generate infrared thermal map;

[0008] Sensor assembly for detecting the working state of the refrigeration module and generating detection data.

[0009] It can be understood that, through the structure setting described above, when the refrigerant leakage detection system works, whether the infrared thermal map generated by infrared camera shooting can be used to preliminarily judge whether the circulation loop leaks when the infrared thermal map generated by infrared camera shooting is consistent with the preset infrared thermal map. Figure One When it is preliminarily judged that the circulation loop leaks, the detection data generated by sensor assembly is used to accurately judge whether the circulation loop leaks when the detection data generated by sensor assembly is consistent with the preset detection data, which can not only realize the detection of whether the circulation loop leaks, but also be suitable for online detection in production line and improve detection accuracy.

[0010] In one embodiment, the condenser has an inlet end and an outlet end, and the refrigerant can enter the condenser from the inlet end and be discharged from the outlet end.

[0011] The sensor assembly comprises a first temperature sensor and a second temperature sensor, the first temperature sensor is installed on the inlet end of the condenser for detecting the temperature of the inlet end, and the second temperature sensor is installed on the outlet end of the condenser for detecting the temperature of the outlet end.

[0012] It can be understood that through the above structure, the refrigerant leakage detection system can accurately detect whether the circulating loop leaks by comparing the temperature difference detected by the first temperature sensor and the second temperature sensor.

[0013] In one embodiment, the sensor assembly comprises a flow meter installed on the circulating loop for detecting the flow of refrigerant in the circulating loop.

[0014] It can be understood that through the above structure, the refrigerant leakage detection system can accurately detect whether the circulating loop leaks by comparing the flow value detected by the flow meter, and double insurance of detection can be achieved.

[0015] In one embodiment, the flow meter is configured as a Coriolis flow meter.

[0016] In one embodiment, the flow control valve comprises a ball valve and a stop valve, which are independent of each other and can control the on / off of the circulating loop respectively.

[0017] It can be understood that through the above structure, the refrigerant leakage detection system can achieve double insurance of on / off control of the circulating loop.

[0018] In one embodiment, the infrared camera is configured as an infrared thermal imager.

[0019] In one embodiment, the sensor assembly further comprises a pressure sensor installed on the circulating loop for detecting the pressure value of the refrigerant passing through the pressure sensor.

[0020] It can be understood that through the above structure, the refrigerant leakage detection system can accurately detect whether the circulating loop leaks by comparing the pressure value detected by the pressure sensor.

[0021] In one embodiment, the number of pressure sensors is three, and the three pressure sensors are respectively set as a first pressure sensor, a second pressure sensor and a third pressure sensor.

[0022] The first pressure sensor is arranged on the circulating loop between the evaporator and the compressor, the second pressure sensor is arranged on the circulating loop between the compressor and the condenser, and the third pressure sensor is arranged on the circulating loop between the condenser and the evaporator.

[0023] It can be understood that, through the above structure, when the refrigerant leakage detection system works, the specific leakage position of the circulating loop can be determined by comparing the pressure values measured by the three pressure sensors with the corresponding preset pressure values, and the leakage point of the circulating loop can be quickly identified.

[0024] In one of the embodiments, the refrigerant leakage detection system further comprises a data acquisition module electrically connected with the sensor assembly, for collecting and analyzing the detection data transmitted by the sensor assembly.

[0025] It can be understood that, through the above structure, when the refrigerant leakage detection system works, the data acquisition module can be used to automatically detect whether the circulating loop leaks.

[0026] The application also claims to protect a refrigerator cabinet comprising the above refrigerant leakage detection system.

[0027] Due to the application of the above technical solution, the application has the following advantages compared with the prior art.

[0028] The refrigerant leakage detection system and the refrigerator cabinet claimed in the application can use the infrared thermal image generated by the infrared camera to preliminarily determine whether the circulating loop leaks, and use the detection data generated by the sensor assembly to accurately determine whether the circulating loop leaks when it is preliminarily determined that the circulating loop leaks. Figure One This not only can detect whether the circulating loop leaks, but also can be applied to online detection in the production line and improve the detection accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed in the embodiment or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0030] Figure 1A schematic diagram of the refrigerant leakage detection system provided in the present application.

[0031] Reference numerals: 100, refrigerant leakage detection system; 11, compressor; 12, condenser; 121, inlet end; 122, outlet end; 13, evaporator; 20, flow control valve; 21, ball valve; 22, stop valve; 30, infrared camera; 31, infrared thermal imager; 41, first temperature sensor; 42, second temperature sensor; 43, flow meter; 44, pressure sensor; 441, first pressure sensor; 442, second pressure sensor; 443, third pressure sensor; 101, circulation loop. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0033] It should be noted that when an element is referred to as "provided on" another element, it can be directly provided on the other element or there can be a middle element. When an element is referred to as "provided on" another element, it can be directly provided on the other element or there can be a middle element. When an element is referred to as "fixed on" another element, it can be directly fixed on the other element or there can be a middle element.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application only for the purpose of describing specific embodiments of the present application, and is not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0035] The refrigerant leakage detection system 100 claimed in the present application is used for detecting whether the circulation loop 101 of refrigerant in a refrigerator cabinet leaks, and can quickly identify the leakage point on the circulation loop 101. Here, the refrigerator cabinet specifically refers to a small household refrigerator cabinet.

[0036] As Figure 1As shown, an embodiment of the refrigerant leak detection system 100 provided in this application includes a refrigeration module, a flow control valve 20, an infrared camera 30, and a sensor assembly. The refrigeration module includes a compressor 11, a condenser 12, and an evaporator 13, which are sequentially connected to form a circulation loop 101. The flow control valve 20 is installed on the circulation loop 101 and is used to control the on / off state of the circulation loop 101. The infrared camera 30 is correspondingly arranged with the condenser 12, and the infrared camera 30 can capture images of the condenser 12 and generate an infrared thermal image. The sensor assembly is used to detect the working status of the refrigeration module and generate detection data.

[0037] It is understandable that when the refrigerant leak detection system 100 is working, it can use the infrared camera 30 to capture an infrared thermal image to determine whether the generated image matches a preset infrared thermal image. Figure One This method allows for a preliminary assessment of whether the circulating loop 101 is leaking. If a leak is initially determined in the circulating loop 101, the sensor assembly is used to check whether the generated detection data matches the preset detection data to accurately determine whether the circulating loop 101 is leaking. This not only enables the detection of whether the circulating loop 101 is leaking, but also can be applied to online detection in the production line, improving detection accuracy. Here, the preset infrared thermal image and preset detection data specifically refer to the infrared thermal image captured by the infrared camera 30 and the detection data obtained by the sensor assembly when the circulating loop 101 is fully enclosed and leak-free.

[0038] It should be noted that when the refrigerator cabinet is being manufactured on the production line, the operators on the production line can make a preliminary judgment on whether the circulation loop 101 has leaked by observing and comparing the infrared thermal image captured by the infrared camera 30. This places low demands on the operators on the production line, as they can make the judgment based on their work experience. However, when it is preliminarily determined that the circulation loop 101 has leaked, the precise judgment on whether the circulation loop 101 has leaked can be made by technicians through the detection data obtained from the sensor components.

[0039] like Figure 1 As shown, the flow control valve 20 includes a ball valve 21 and a shut-off valve 22. The ball valve 21 and the shut-off valve 22 are independent of each other and can control the on / off state of the circulation loop 101 respectively. That is, the ball valve 21 and the shut-off valve 22 need to be opened or closed simultaneously to control the flow of refrigerant in the circulation loop 101. This allows the refrigerant leak detection system 100 to achieve double protection in controlling the on / off state of the circulation loop 101.

[0040] It should be noted that the ball valve 21 is a Danfoss GBC type ball valve, which only needs to be rotated by 90 degrees from full opening to full closing, has a working temperature range of -40-150℃, very low flow resistance, can flow in both directions, and is suitable for the flow of refrigerants in different states in the circulation loop 101 of the refrigerant leakage detection system 100. The stop valve 22 is a Danfoss BML type diaphragm stop valve, which can be opened and closed by a hand wheel, is easy to operate, has a working temperature range of -55-100℃, and has a small pressure drop. It can be understood that the ball valve 21 and the stop valve 22 both have excellent sealing performance, ensuring that the refrigerant does not leak after the ball valve 21 and the stop valve 22 are closed.

[0041] In this application, the infrared camera 30 is configured as an infrared thermal imager 31, which can specifically use a U.S. Fluke infrared thermal imager, model TIX660, which can automatically correct the temperature by inputting the influence parameters of atmospheric transmittance, environmental temperature, environmental humidity, emissivity, distance, etc.

[0042] As shown in Figure 1 The condenser 12 has an inlet end 121 and an outlet end 122, and the refrigerant can enter the condenser 12 from the inlet end 121 and be discharged from the outlet end 122; wherein the sensor assembly includes a first temperature sensor 41 and a second temperature sensor 42, the first temperature sensor 41 is installed on the inlet end 121 of the condenser 12 for detecting the temperature of the inlet end 121; the second temperature sensor 42 is installed on the outlet end 122 of the condenser 12 for detecting the temperature of the outlet end 122. Here, the first temperature sensor 41 and the second temperature sensor 42 are specifically PT-100 platinum resistance temperature sensors.

[0043] It can be understood that when the refrigerant leakage detection system 100 is working, the actual detected temperature difference between the second temperature sensor 42 and the first temperature sensor 41 can be compared with the temperature difference between the inlet end 121 and the outlet end 122 of the condenser 12 when the circulation loop 101 is fully closed and no leakage occurs, and when the actual detected temperature difference is lower than the preset temperature difference, it can be proved that the circulation loop 101 has a leakage.

[0044] As shown in Figure 1As shown, the sensor assembly comprises a flow meter 43 installed on the circulation loop 101 for detecting the flow rate of the refrigerant in the circulation loop 101. That is, the refrigerant leakage detection system 100 can achieve accurate detection of whether the circulation loop 101 leaks by comparing the flow rate value measured by the flow meter 43. Here, the flow meter 43 is configured as a Coriolis flow meter, wherein the working principle of the Coriolis flow meter is that the refrigerant vibrates when flowing through the Coriolis flow meter, forming a rotating coordinate system, inducing a Coriolis effect, and the sensor in the Coriolis flow meter can detect and analyze the changes in the flow tube frequency, phase difference and amplitude, which represent the mass flow rate and density of the refrigerant. It should be noted that the Coriolis flow meter has excellent performance and very high precision in measuring the mass flow rate, volume flow rate and density of liquid, gas and two-phase flow, and is not sensitive to fluid viscosity and does not require upper and lower straight pipe sections.

[0045] It should be noted that when the flow rate value detected by the flow meter 43 is less than the flow rate value of the refrigerant when the circulation loop 101 is fully closed and no leakage occurs, it can be proved that the circulation loop 101 has a leak.

[0046] As shown in Figure 1 , the sensor assembly further comprises a pressure sensor 44 installed on the circulation loop 101 for detecting the pressure value of the refrigerant passing through the pressure sensor 44. That is, the refrigerant leakage detection system 100 can achieve accurate detection of whether the circulation loop 101 leaks by comparing the pressure value measured by the pressure sensor 44. It should be noted that when the pressure value detected by the pressure sensor 44 is less than the pressure value of the refrigerant when the circulation loop 101 is fully closed and no leakage occurs, it can be proved that the circulation loop 101 has a leak.

[0047] As shown in Figure 1 , the number of pressure sensors 44 is configured as three, and the three pressure sensors 44 are respectively set as a first pressure sensor 441, a second pressure sensor 442 and a third pressure sensor 443; wherein the first pressure sensor 441 is arranged on the circulation loop 101 at a position between the evaporator 13 and the compressor 11, the second pressure sensor 442 is arranged on the circulation loop 101 at a position between the compressor 11 and the condenser 12, and the third pressure sensor 443 is arranged on the circulation loop 101 at a position between the condenser 12 and the evaporator 13. That is, the refrigerant leakage detection system 100 can determine the specific position of the circulation loop 101 where the leak occurs and achieve rapid identification of the leak point of the circulation loop 101 by comparing the pressure values measured by the three pressure sensors 44 with the corresponding preset pressure values.

[0048] It should be noted that when the circulating loop 101 is completely closed and no leakage occurs, the pressure value of the refrigerant flowing on the circulating loop 101 between the evaporator 13 and the compressor 11 corresponds to a reference value, the pressure value of the refrigerant flowing on the circulating loop 101 between the compressor 11 and the condenser 12 corresponds to a reference value, and the pressure value of the refrigerant flowing on the circulating loop 101 between the condenser 12 and the evaporator 13 corresponds to a reference value. When the circulating loop 101 leaks, the pressure values measured by the first pressure sensor 441, the second pressure sensor 442 and the third pressure sensor 443 are all less than the corresponding reference values. Therefore, when determining the leakage point of the circulating loop 101, the pressure values measured by the first pressure sensor 441, the second pressure sensor 442 and the third pressure sensor 443 are compared with the corresponding reference values respectively, and the pipe section of the circulating loop 101 corresponding to the pressure sensor 44 with the largest difference value is the leakage point.

[0049] In the present application, the refrigerant leakage detection system 100 further comprises a data acquisition module (not shown in the figure), which is electrically connected with the sensor assembly and is used for collecting and analyzing the detection data transmitted by the sensor assembly, so that the refrigerant leakage detection system 100 can automatically detect whether the circulating loop 101 leaks when it works. Here, the data acquisition module can be an Agilent data acquisition instrument.

[0050] In summary, when the refrigerant leakage detection system 100 works, the infrared camera 30 can be used to take the infrared image of the condenser 12 to preliminarily determine whether the circulating loop 101 leaks. When it is preliminarily determined that the circulating loop 101 leaks, the first temperature sensor 41 and the second temperature sensor 42 can be used to measure the temperature data, and the flow meter 43 can be used to measure the flow value to accurately determine whether the circulating loop 101 leaks. Finally, the first pressure sensor 441, the second pressure sensor 442 and the third pressure sensor 443 can be used to determine which pipe section of the circulating loop 101 leaks.

[0051] In addition, the present application also provides a refrigerator cabinet comprising the refrigerant leakage detection system 100 described above.

[0052] The technical features of the above embodiments can be combined in any way. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the present application.

[0053] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present application, and are not used as a limitation to the present application, and as long as the above embodiments are made within the scope of the present application, the appropriate changes and variations of the above embodiments fall within the scope of the present application.

Claims

1. A refrigerant leak detection system characterized by, The refrigerant leakage detection system (100) comprises: A refrigeration module comprising a compressor (11), a condenser (12) and an evaporator (13), which are sequentially communicated and form a circulation loop (101); A flow control valve (20) installed on the circulation loop (101) for controlling the on / off of the circulation loop (101); An infrared camera (30) arranged corresponding to the condenser (12), which can shoot the condenser (12) and generate an infrared thermal image; A sensor assembly for detecting the working state of the refrigeration module and generating detection data.

2. The refrigerant leak detection system of claim 1, wherein, The condenser (12) has an inlet end (121) and an outlet end (122), and the refrigerant can enter the condenser (12) from the inlet end (121) and be discharged from the outlet end (122); The sensor assembly comprises a first temperature sensor (41) and a second temperature sensor (42), the first temperature sensor (41) is installed on the inlet end (121) of the condenser (12) for detecting the temperature of the inlet end (121), and the second temperature sensor (42) is installed on the outlet end (122) of the condenser (12) for detecting the temperature of the outlet end (122).

3. The refrigerant leak detection system according to claim 1 or 2, characterized by, The sensor assembly comprises a flow meter (43) installed on the circulation loop (101) for detecting the flow of refrigerant in the circulation loop (101).

4. The refrigerant leak detection system of claim 3, wherein, The flow meter (43) is configured as a Coriolis flow meter.

5. The refrigerant leak detection system of claim 1, wherein, The flow control valve (20) comprises a ball valve (21) and a stop valve (22), which are independent of each other and can control the on / off of the circulation loop (101) respectively.

6. The refrigerant leak detection system of claim 1, wherein, The infrared camera (30) is configured as an infrared thermal imager (31).

7. The refrigerant leak detection system of claim 1, wherein, The sensor assembly further comprises a pressure sensor (44) installed on the circulation loop (101) for detecting the pressure value of the refrigerant passing through the pressure sensor (44).

8. The refrigerant leak detection system of claim 7, wherein, The number of pressure sensors (44) is three, and the three pressure sensors (44) are respectively set as a first pressure sensor (441), a second pressure sensor (442) and a third pressure sensor (443); The first pressure sensor (441) is arranged on the circulation loop (101) between the evaporator (13) and the compressor (11), the second pressure sensor (442) is arranged on the circulation loop (101) between the compressor (11) and the condenser (12), and the third pressure sensor (443) is arranged on the circulation loop (101) between the condenser (12) and the evaporator (13).

9. The refrigerant leak detection system of claim 1, wherein, The refrigerant leakage detection system (100) further comprises a data acquisition module electrically connected with the sensor assembly, configured to collect and analyze the detection data transmitted by the sensor assembly.

10. A refrigerator cabinet, characterized in that The refrigerant leakage detection system (100) according to any one of claims 1-9 is included.

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