External refrigerant detection module

Abstract

The utility model relates to the technical field of refrigerant detection devices, and particularly provides an external refrigerant detection module which comprises an outer shell, the outer shell comprises a front cover and a rear cover which are buckled and fixed with each other, and a containing cavity is defined by the front cover and the rear cover; and the heat conduction refrigerant sensor is detachably arranged in the containing cavity, and the heat conduction refrigerant sensor is used for measuring the content of a refrigerant in the environment. The external refrigerant detection module adopts a heat conduction refrigerant sensor, and the working principle of the heat conduction refrigerant sensor is that the refrigerant concentration is detected based on the change of heat conductivity, so that the external refrigerant detection module is not easily influenced by the violent change of environment temperature, the connection of internal components by an optical pipeline is avoided, the distortion of an optical path is effectively avoided, and the reliability of the system is improved. And therefore, the reliability and the practicability of the external refrigerant detection module are further enhanced.

Description

Technical Field

[0001] This application relates to the technical field of refrigerant detection devices, and particularly to an external refrigerant detection module. Background Art

[0002] Refrigerant (commonly known as refrigerant) is a working fluid used to transfer heat energy and produce a cooling effect in air conditioners and refrigeration systems. In order to address the global warming problem caused by the greenhouse effect, the air conditioning industry has gradually started to use flammable refrigerant A2L. However, with the use of flammable refrigerant A2L, its leakage may cause an explosion, threatening the safety of users. Therefore, it is necessary to install a corresponding refrigerant detection module to monitor the leakage and give an alarm in a timely manner.

[0003] However, the existing refrigerant detection modules for the external pipes of air conditioners usually use infrared refrigerant sensors for detection. Such sensors are equipped with components such as infrared light sources, air sampling pumps, and filters inside, and these components are connected through optical pipelines. In a harsh environment, when the temperature changes drastically, the optical path is distorted, resulting in low reliability of the existing refrigerant detection modules.

[0004] Therefore, there are defects and deficiencies in the prior art, which need to be further improved and developed. Utility Model Content

[0005] In view of the above deficiencies of the prior art, the purpose of this application is to provide an external refrigerant detection module, aiming to solve the problem that in a harsh environment, when the temperature changes drastically, the optical path of the existing refrigerant detection module is distorted, resulting in low reliability of the refrigerant detection module.

[0006] One technical solution adopted by this application to solve the technical problem is as follows: An external refrigerant detection module for refrigerant detection, which includes:

[0007] A housing body, the housing body includes a front cover and a rear cover that are snap-fitted and fixed to each other, and a receiving cavity is defined by the front cover and the rear cover;

[0008] A thermal conductivity refrigerant sensor, the thermal conductivity refrigerant sensor is detachably arranged in the receiving cavity, and the thermal conductivity refrigerant sensor is used to measure the content of the refrigerant in the environment.

[0009] Optionally, the external refrigerant detection module further includes:

[0010] A control board, the control board is fixedly arranged on the side of the rear cover facing the front cover; the control board has a panel end and a back end that are oppositely arranged;

[0011] A reminder device, the reminder device is fixedly arranged on the panel end;

[0012] Wherein, the control board is used to control whether the reminder device reminds the user.

[0013] Optionally, the reminder device includes a buzzer and a plurality of LED lights, and both the buzzer and the plurality of LED lights are fixedly arranged on the panel end;

[0014] Among them, the plurality of LED lights include red LED lights, yellow LED lights and green LED lights. When the concentration of gaseous refrigerant detected by the thermal conductivity refrigerant sensor reaches a preset value, the red LED light flashes for 2-4 seconds and then extinguishes for 1-2 seconds, and the buzzer sounds once every 3-5 seconds.

[0015] Optionally, a ventilation protrusion is arranged on the side of the thermal conductivity refrigerant sensor facing away from the rear cover, and the ventilation protrusion is used for contacting with air.

[0016] Optionally, the external refrigerant detection module further includes:

[0017] A reset button, the reset button is fixedly arranged on the control board, and the reset button is used to reset the reminder device.

[0018] Optionally, the front cover is provided with:

[0019] A red light hole, the red light hole is arranged corresponding to the red LED light, and the red light hole is used for fixing and protecting the red LED light;

[0020] A yellow light hole, the yellow light hole is arranged corresponding to the yellow LED light, and the yellow light hole is used for fixing and protecting the yellow LED light;

[0021] A green light hole, the green light hole is arranged corresponding to the green LED light, and the green light hole is used for fixing and protecting the green LED light;

[0022] A reset hole, the reset hole is arranged corresponding to the reset button, and the reset hole is used for fixing and protecting the reset button;

[0023] A ventilation hole, the ventilation hole is arranged corresponding to the ventilation protrusion, and the ventilation hole is used to guide the airflow to contact with the ventilation protrusion;

[0024] A plurality of sound holes, the sound holes are arranged corresponding to the buzzer, and the sound holes are used for the propagation of the sound of the buzzer.

[0025] Optionally, a concealed wire outlet and a plurality of mounting holes are arranged on the rear cover, and the plurality of mounting holes are all arranged at intervals around the concealed wire outlet.

[0026] Optionally, a exposed wire outlet is opened below the front cover, and the exposed wire outlet is used for the exposed wire to extend out of the accommodating cavity.

[0027] Optionally, the external refrigerant detection module further includes a plurality of wiring terminals fixedly arranged on the back end, and the plurality of wiring terminals are used for electrically connecting with external devices.

[0028] Optionally, the control board includes a control chip fixedly arranged on the control board, and the control chip is electrically connected to the reminder device, the reset button, the thermal conductivity refrigerant sensor and the wiring terminals.

[0029] Compared with the prior art, the present application provides an external refrigerant detection module. The external refrigerant detection module realizes the detection of external refrigerant gas through the thermal conductivity refrigerant sensor. Compared with the traditional infrared sensor refrigerant detection module, the thermal conductivity refrigerant sensor adopted by the external refrigerant detection module has a working principle based on the change of thermal conductivity to detect the refrigerant concentration. Therefore, it is not easily affected by the drastic change of the ambient temperature, avoids using optical pipelines to connect internal components, effectively avoids the problem of reduced detection reliability caused by optical path distortion, and further enhances the reliability and practicability of the external refrigerant detection module. Description of the Drawings

[0030] Figure 1 is a three-dimensional structural schematic diagram of the external refrigerant detection module provided in the present application;

[0031] Figure 2 is a three-dimensional exploded structural schematic diagram of the external refrigerant detection module provided in the present application;

[0032] Figure 3 is another three-dimensional exploded structural schematic diagram of the external refrigerant detection module provided in the present application;

[0033] Figure 4 is a functional principle schematic block diagram of the external refrigerant detection module provided in the present application.

[0034] Description of the Reference Numerals:

[0035] 10. External refrigerant detection module; 11. Outer housing; 111. Front cover; 1112. Red light hole; 1113. Yellow light hole; 1114. Green light hole; 1115. Reset hole; 1116. Vent hole; 1117. Sound outlet; 112. Rear cover; 1121. Mounting hole; 1122. Dark wire outlet; 1123. Bright wire outlet; 12. Thermal conductivity refrigerant sensor; 121. Vent protrusion; 13. Control board; 131. Panel end; 132. Back end; 133. Control chip; 14. Reminder device; 141. Buzzer; 142. LED lamp; 1421. Red LED lamp; 1422. Yellow LED lamp; 1423. Green LED lamp; 15. Reset button; 16. Wiring terminal. Detailed implementation manners

[0036] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present application and should not be construed as limiting the present application.

[0037] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0038] In the description of the present application, it should be noted that, unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0039] Please refer to Figures 1 to 3, the first embodiment of the present application provides an external refrigerant detection module 10 for refrigerant detection. The external refrigerant detection module 10 detects the refrigerant concentration in the surrounding environment in real time through a thermal conductivity refrigerant sensor 12. The thermal conductivity refrigerant sensor 12 is arranged in the accommodating cavity of the outer housing 11 and is in full contact with the external air through the air-permeable protrusions 121 on the surface of the thermal conductivity refrigerant sensor 12, so as to be able to detect refrigerant gas. When the refrigerant gas contacts the thermal conductivity refrigerant sensor 12, it will cause a change in the thermal conductivity of the thermal conductivity refrigerant sensor 12, which is then converted into an electrical signal. These electrical signals are then transmitted to the control chip 133 on the control board 13 for processing and analysis. The control chip 133 can quickly judge whether the current refrigerant concentration exceeds the safe range according to the preset refrigerant concentration threshold. Once it detects that the refrigerant concentration exceeds the standard, the control chip 133 will immediately trigger the reminder device 14. The reminder device 14 includes a buzzer 141 and several LED lights 142. The buzzer 141 will emit a sound alarm, and the several LED lights 142 will emit a light alarm to quickly remind the user of the possible refrigerant leakage situation. The flashing mode of the red LED light 1421 flashing for 2 to 4 seconds and then extinguishing for 1 to 2 seconds makes the alarm signal more intuitive and easy to understand, improving the user's emergency response speed. At the same time, the external refrigerant detection module 10 also includes a reset button 15. When the user finishes dealing with the refrigerant leakage, simply pressing the reset button 15 can reset the reminder device 14 to stop the alarm, thus avoiding the unnecessary trouble brought by continuous alarm to the user. The external refrigerant detection module 10 is connected to external devices by setting a plurality of wiring terminals 16, greatly simplifying the wiring connection process and improving the usability and maintainability of the external refrigerant detection module 10.

[0040] Please refer to Figures 1 to 2, in some embodiments, the external refrigerant detection module 10 includes a housing 11 and a thermal conductivity refrigerant sensor 12; the housing 11 is used to fix and protect the thermal conductivity refrigerant sensor 12, the housing 11 includes a front cover 111 and a rear cover 112 which are fastened and fixed to each other, and a receiving cavity is defined by the front cover 111 and the rear cover 112; the thermal conductivity refrigerant sensor 12 is detachably arranged in the receiving cavity, and the thermal conductivity refrigerant sensor 12 is used to measure the content of the refrigerant in the environment, thereby making the maintenance and replacement of the thermal conductivity refrigerant sensor 12 more convenient, reducing the use cost. Compared with the traditional infrared sensor refrigerant detection module, the thermal conductivity refrigerant sensor 12 adopted by the external refrigerant detection module 10 has a working principle based on the change of thermal conductivity to detect the refrigerant concentration. Therefore, it is not easily affected by the drastic change of the ambient temperature, effectively avoiding the problem of reduced detection reliability caused by the optical path distortion, and further enhancing the reliability and practicability of the external refrigerant detection module 10. At the same time, the detachable arrangement of the thermal conductivity refrigerant sensor 12 further enhances the reliability and usability of the external refrigerant detection module 10, making the maintenance and replacement of the external refrigerant detection module 10 more convenient, reducing the use cost, and prolonging the service life of the external refrigerant detection module 10. The external refrigerant detection module 10 provides a more reliable and stable guarantee for the safe operation of air-conditioning equipment in harsh environments.

[0041] Please refer to Figure 2 , in some embodiments, the detection principle of the thermal conductivity refrigerant sensor 12 is based on the difference in the thermal conductivity of gases to work. Different gases have different heat conduction capabilities (thermal conductivity) for heat, and this difference can be used to identify the type and concentration of gases. The thermal conductivity refrigerant sensor 12 usually includes two thermocouples or two heating elements, one of which is a heater and the other is a detector. The heater heats the gas inside the sensor to increase the gas temperature. Due to the different thermal conductivities of gases, the temperature difference between the heater and the detector will change. When the thermal conductivity of the gas changes, it will affect the heat transfer in the sensor, thereby changing the temperature and resistance value of the detector. The temperature change or resistance change sensed by the detector is converted into an electrical signal, and these signals can be used to judge the gas concentration after being processed. By comparing with the measurement results of known standard gases, the thermal conductivity refrigerant sensor 12 can calculate the concentration of the target gas. The thermal conductivity refrigerant sensor 12 is not easily damaged and not easily polluted by gases. The thermal conductivity refrigerant sensor 12 has a self-monitoring and self-checking function inside, has good long-term reliability, and uses self-heating at the microelectromechanical system level to prevent condensation, with lower power consumption, thereby enhancing the practicability and reliability of the external refrigerant detection module 10.

[0042] Please refer to Figures 1 to 3, in some embodiments, the external refrigerant detection module 10 further includes a control board 13 and a reminder device 14. The control board 13 is fixedly disposed on the side of the rear cover 112 facing the front cover 111; the control board 13 has a panel end 131 and a back end 132 disposed opposite to each other; the panel end 131 is the end facing the front cover 111, and the back end 132 is the end facing the rear cover 112. The reminder device 14 is used to remind the user. Thus, the reminder device 14 can issue an alarm in time when the refrigerant concentration exceeds the preset value, effectively preventing safety problems caused by refrigerant leakage. The reminder device 14 is disposed on the panel end 131; wherein, the control board 13 is used to control whether the concentration of gaseous refrigerant detected by the thermal conductivity refrigerant sensor 12 reaches the preset value, and control whether the reminder device 14 reminds the user, thereby realizing precise management of the alarm signal and avoiding false alarms and missed alarms.

[0043] Please refer to Figure 1 , in some embodiments, the reminder device 14 includes a buzzer 141 and a plurality of LED lights 142. The buzzer 141 and the plurality of LED lights 142 are both disposed on the panel end 131. Thus, by combining the sound and light reminder methods, the user's perception ability of the alarm signal is enhanced, ensuring that a warning can be obtained in time when the refrigerant leaks. Among them, the LED lights 142 include a red LED light 1421, a yellow LED light 1422, and a green LED light 1423. When the concentration of gaseous refrigerant detected by the thermal conductivity refrigerant sensor 12 reaches the preset value, the red LED light 1421 flashes for 2 to 4 seconds and then goes out for 1 to 2 seconds, and the buzzer 141 rings once within 3 to 5 seconds. Thus, the alarm signal is made more intuitive and easy to understand, improving the user's emergency response speed.

[0044] Please refer to Figure 1 , in some embodiments, the external refrigerant detection module 10 further includes a reset button 15. The reset button 15 is fixedly disposed on the control board 13. The reset button 15 is used to reset the reminder device 14. Thus, after the user finishes dealing with the refrigerant leakage, the reminder device 14 can be conveniently reset, avoiding unnecessary troubles caused by continuous alarms.

[0045] Please refer to Figure 1 , in some embodiments, a ventilation protrusion 121 is disposed on the side of the thermal conductivity refrigerant sensor 12 facing away from the rear cover 112. The ventilation protrusion 121 is used to contact the air. Thus, the contact area between the sensor and the air is increased, improving the sensitivity and accuracy of refrigerant detection.

[0046] Please refer to Figures 1 to 3, in some embodiments, the front cover 111 is provided with a red light hole 1112, a yellow light hole 1113, a green light hole 1114, a reset hole 1115 and a ventilation hole 1116; the red light hole 1112 is correspondingly arranged with the red LED lamp 1421, and the red light hole 1112 is used for fixing and protecting the red LED lamp 1421; the yellow light hole 1113 is correspondingly arranged with the yellow LED lamp 1422, and the yellow light hole 1113 is used for fixing and protecting the yellow LED lamp 1422; the green light hole 1114 is correspondingly arranged with the green LED lamp 1423, and the green light hole 1114 is used for fixing and protecting the green LED lamp 1423; the reset hole 1115 is correspondingly arranged with the reset button 15, and the reset hole 1115 is used for fixing and protecting the reset button 15; a sound outlet hole 1117, the sound outlet hole 1117 is correspondingly arranged with the buzzer 141, and the sound outlet hole 1117 is used for the sound propagation of the buzzer 141; the ventilation hole 1116 is correspondingly arranged with the ventilation protrusion 121, and the ventilation hole 1116 is used for guiding the air flow to contact with the ventilation protrusion 121, thereby ensuring the effective operation of the reminder device 14 and the good ventilation of the thermal conductivity refrigerant sensor 12, while protecting the internal components from the interference and damage of the external environment, and further improving the reliability and practicability of the external refrigerant detection module 10.

[0047] Please refer to Figure 3 , in some embodiments, the rear cover 112 is provided with a concealed wire outlet 1122 and a plurality of mounting holes 1121, thereby facilitating the concealment and management of the cable through the concealed wire outlet 1122, and improving the aesthetics and safety of the installation. The plurality of mounting holes 1121 are arranged at intervals around the concealed wire outlet 1122, thereby facilitating the fixing and installation of the external refrigerant detection module 10, and improving the convenience and stability of the installation of the external refrigerant detection module 10.

[0048] Please refer to Figures 2 to 3 , in some embodiments, the rear cover 112 is fixedly installed in an 86-type bottom box pre-embedded in the wall with screws, and then the front cover 111 is snapped into the rear cover 112 to complete the installation and fixing of the external refrigerant detection module 10, thereby increasing the practicability of the external refrigerant detection module 10.

[0049] Please refer to Figures 1 to 3 , in some embodiments, a exposed wire outlet 1123 is opened below the front cover 111, and the exposed wire outlet 1123 is used for the exposed wire to extend from the inside, thereby enabling the user to route the exposed wire according to actual needs and installation environment, and further increasing the practicability of the external refrigerant detection module 10.

[0050] Please refer to Figure 3 In some embodiments, the external refrigerant detection module 10 further includes a terminal block 16. A plurality of terminal blocks 16 are arranged on the back end 132. The terminal block 16 is used for electrical connection with an external device, thereby simplifying the wiring connection process with the external device and improving the usability and maintainability of the external refrigerant detection module 10.

[0051] Please refer to Figure 4 In some embodiments, the control board 13 includes a control chip 133. The control chip 133 is fixedly arranged on the control board 13. The control chip 133 is electrically connected to the reminder device 14, the reset button 15, the thermal conductivity refrigerant sensor 12, and the terminal block 16, thereby realizing the coordinated operation and effective control of the control chip 133 over the reminder device 14, the reset button 15, and the thermal conductivity refrigerant sensor 12, and improving the overall performance and stability of the external refrigerant detection module 10. Furthermore, the rapid transmission and processing of signals are realized, and the response speed and accuracy of the external refrigerant detection module 10 are improved.

[0052] In summary, the present application provides an external refrigerant detection module. The external refrigerant detection module includes: a housing body, the housing body includes a front cover and a rear cover that are fastened and fixed to each other, and the front cover and the rear cover enclose a receiving cavity; a thermal conductivity refrigerant sensor, the thermal conductivity refrigerant sensor is detachably arranged in the receiving cavity, and the thermal conductivity refrigerant sensor is used for measuring the content of the refrigerant in the environment. The external refrigerant detection module realizes the detection of external refrigerant gas through the thermal conductivity refrigerant sensor. Compared with the traditional infrared sensor refrigerant detection module, the external refrigerant detection module adopts the thermal conductivity refrigerant sensor. The working principle of the thermal conductivity refrigerant sensor is based on the change of thermal conductivity to detect the refrigerant concentration. Therefore, it is not easily affected by the drastic change of the environmental temperature, avoids using optical pipelines to connect internal components, and effectively avoids the problem of reduced detection reliability caused by optical path distortion, further enhancing the reliability and practicability of the external refrigerant detection module.

[0053] It should be understood that the application of the present application is not limited to the above examples. For those of ordinary skill in the art, improvements or transformations can be made according to the above description. All such improvements and transformations should fall within the protection scope of the appended claims of the present application.

Claims

1. An external refrigerant detection module for refrigerant detection, characterized in that: The external refrigerant detection module includes: An outer shell, the outer shell comprising a front cover and a rear cover that are buckled and fixed to each other, and the front cover and the rear cover are surrounded by a receiving cavity; A thermal conductivity refrigerant sensor is detachably disposed in the accommodating cavity, and is used to measure the content of refrigerant in the environment.

2. The external refrigerant detection module according to claim 1, characterized in that: The external refrigerant detection module also includes: A control panel, the control panel is fixedly arranged on a side of the rear cover facing the front cover; the control panel has a panel end and a back end that are arranged opposite to each other; A reminder device, the reminder device is fixedly arranged on the panel end; Wherein, the control panel is used to control whether the reminder device reminds the user.

3. The external refrigerant detection module according to claim 2, characterized in that: The reminder device includes a buzzer and a plurality of LED lights, and the buzzer and the plurality of LED lights are fixedly arranged on the panel end; Among them, the several LED lights include a red LED light, a yellow LED light and a green LED light. When the concentration of the gaseous refrigerant detected by the thermal conductivity refrigerant sensor reaches a preset value, the red LED light flashes for 2 to 4 seconds, turns off for 1 to 2 seconds, and the buzzer sounds once every 3 to 5 seconds.

4. The external refrigerant detection module according to claim 3, characterized in that: A ventilation protrusion is arranged on a side of the thermal conductivity refrigerant sensor away from the rear cover, and the ventilation protrusion is used to contact with air.

5. The external refrigerant detection module according to claim 4, characterized in that: The external refrigerant detection module also includes: A reset button is fixedly arranged on the control panel, and is used to reset the reminder device.

6. The external refrigerant detection module according to claim 5, characterized in that: The front cover is provided with: A red lamp hole, the red lamp hole is arranged corresponding to the red LED lamp, and the red lamp hole is used for fixing and protecting the red LED lamp; A yellow lamp hole, the yellow lamp hole is arranged corresponding to the yellow LED lamp, and the yellow lamp hole is used for fixing and protecting the yellow LED lamp; A green lamp hole, the green lamp hole is arranged corresponding to the green LED lamp, and the green lamp hole is used for fixing and protecting the green LED lamp; A reset hole, the reset hole is arranged corresponding to the reset button, and the reset hole is used to fix and protect the reset button; A vent hole, the vent hole is arranged corresponding to the vent protrusion, and the vent hole is used to guide the airflow to contact the vent protrusion; A plurality of sound outlet holes are provided corresponding to the buzzer and are used for propagating the sound of the buzzer.

7. The external refrigerant detection module according to claim 2, characterized in that: The rear cover is provided with a concealed wire outlet and a plurality of mounting holes, and the plurality of mounting holes are arranged at intervals around the concealed wire outlet.

8. The external refrigerant detection module according to claim 7, characterized in that: An exposed wire outlet is provided below the front cover, and the exposed wire outlet is used for the exposed wire to extend out of the accommodating cavity.

9. The external refrigerant detection module according to claim 2, characterized in that: The external refrigerant detection module also includes a plurality of connection terminals, which are fixedly arranged on the back end and are used for electrical connection with external devices.

10. The external refrigerant detection module according to claim 2, characterized in that: The control board includes a control chip, which is fixedly arranged on the control board. The control chip is electrically connected to the reminder device, the reset button, the thermal conductivity refrigerant sensor and the connection terminal.

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