Refrigerant Sensors and Electrical Equipment

Abstract

This invention discloses a refrigerant sensor and electrical device. The refrigerant sensor includes a substrate with a first mounting portion; a detection unit and a heating unit disposed on the first mounting portion; and a gas channel having a first port and a second port. The first port is connected to the first mounting portion and is arranged around the outer periphery of the detection unit and the heating unit, while the second port is adapted to communicate with the outside of the refrigerant sensor. The detection unit and the heating unit are disposed on the first mounting portion, and the first port of the gas channel is connected to the first mounting portion and arranged around the outer periphery of the detection unit and the heating unit. The heating unit can heat the environment around the detection unit, and the gas channel has a heat preservation effect, which helps to improve the uniformity of the ambient temperature around the detection unit. Furthermore, the refrigerant can flow directly from the gas channel to the detection unit, which can shorten the response time of the refrigerant sensor and improve detection accuracy.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment technology, and more specifically, to a refrigerant sensor and electrical equipment. Background Technology

[0002] In related technologies, refrigerants are widely used in refrigerators, air conditioners, cold storage facilities, chemical refrigeration equipment, and other similar devices. Also known as refrigerants, they are a type of medium used for heat transfer in refrigeration systems. However, refrigerant leaks can damage the ozone layer and even cause explosions. Therefore, refrigerant leak detection is crucial for system safety.

[0003] Currently, temperature and humidity sensors (such as capacitive temperature and humidity sensors) are commonly used for leak detection. However, at low temperatures, the sensor surface may frost or condense, causing its humidity-sensing element to fail to accurately reflect the ambient humidity. Therefore, when the ambient temperature is below freezing (0°C), the accuracy of humidity measurement drops sharply or even fails. When the humidity compensation signal is inaccurate, the final result of refrigerant leak detection will be severely biased, leading to false alarms (misinterpreting normal fluctuations as leaks) or missed alarms (failing to identify actual leaks), seriously threatening the safety and energy efficiency of the refrigeration system.

[0004] Currently, to address the issue of low-temperature operation of sensors, simple overall heating or adding an insulating shell to the sensor is sometimes employed. However, these methods either consume too much energy or result in uneven heating, leading to localized overheating or inaccurate temperature measurements, failing to meet the requirements of refrigerant sensors for measurement stability and accurate compensation.

[0005] Therefore, a new technical solution is needed to solve the above-mentioned technical problems. Summary of the Invention

[0006] One objective of this invention is to provide a new technical solution for refrigerant sensors.

[0007] According to a first aspect of the present invention, a refrigerant sensor is provided. The refrigerant sensor includes: A substrate, wherein the substrate is provided with a first mounting portion; A detection unit and a heating unit are disposed in the first mounting part; The gas channel has a first port and a second port. The first port is connected to the first mounting part and is arranged around the outer periphery of the detection unit and the heating unit. The second port is adapted to communicate with the external refrigerant sensor.

[0008] Optionally, the first port is sealed to the first mounting portion.

[0009] Optionally, multiple heating units are provided, and the multiple heating units are arranged around the outer periphery of the detection unit.

[0010] Optionally, the refrigerant sensor further includes a control unit, which is electrically connected to the heating unit.

[0011] Optionally, the substrate is provided with a second mounting portion, the control unit is disposed on the second mounting portion, and a heat insulation zone is provided between the first mounting portion and the second mounting portion.

[0012] Optionally, the heat insulation zone includes a hollow portion, and a connecting portion is provided between the first mounting portion and the second mounting portion.

[0013] Optionally, the refrigerant sensor further includes a housing, the substrate and the gas channel are disposed inside the housing, the housing has a first through hole, and the second port is connected to the first through hole.

[0014] Optionally, the refrigerant sensor further includes a waterproof and breathable membrane disposed between the second port and the first through hole, with the opposite ends of the waterproof and breathable membrane respectively sealed to the second port and the first through hole.

[0015] Optionally, the gas passage includes a first receiving cavity, a second receiving cavity, and a first channel, wherein the first receiving cavity and the second receiving cavity are connected by the first channel, and the inner diameter of the first receiving cavity and the second receiving cavity is larger than the inner diameter of the first channel.

[0016] Optionally, the refrigerant sensor further includes a flexible element and a support element. The flexible element has a second channel, and the support element has a third channel. The second channel is connected to the third channel to form the gas channel. The flexible element covers the support element, and one end of the support element is connected to the first mounting portion.

[0017] Optionally, a first seal is provided between the second channel and the third channel.

[0018] Optionally, the flexible member has a limiting portion that can abut against the substrate to limit the substrate.

[0019] According to a second aspect of the present invention, an electrical device is provided. This electrical device includes the refrigerant sensor described in the above embodiments.

[0020] One technical advantage of this application is that the detection unit and the heating unit are located in the first mounting part, the first port of the gas channel is connected to the first mounting part and arranged around the outer periphery of the detection unit and the heating unit, the heating unit can heat the environment of the detection unit, the gas channel has a heat preservation effect, which is conducive to improving the uniformity of the ambient temperature around the detection unit, and the refrigerant can flow directly from the gas channel to the detection unit, which can shorten the response time of the refrigerant sensor and improve the detection accuracy.

[0021] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0022] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the invention and, together with their description, serve to explain the principles of the invention.

[0023] Figure 1 This is a schematic diagram of the structure of a refrigerant sensor according to an embodiment of this application.

[0024] Figure 2 This is an exploded view of the structure of a refrigerant sensor according to an embodiment of this application.

[0025] Figure 3 This is a cross-sectional schematic diagram of a refrigerant sensor according to an embodiment of this application.

[0026] Figure 4 This is a partial structural schematic diagram of a refrigerant sensor according to an embodiment of this application.

[0027] Figure 5 This is a schematic diagram of the structure of a flexible component of a refrigerant sensor according to an embodiment of this application.

[0028] Figure 6 This is a schematic diagram of the structure of the first housing of a refrigerant sensor according to an embodiment of this application.

[0029] Figure label: 1. Substrate; 11. First mounting part; 12. Second mounting part; 13. Connecting part; 14. Cutout part; 2. Detection unit; 3. Heating unit; 4. Gas channel; 41. First receiving cavity; 42. First channel; 43. Second receiving cavity; 5. Control unit; 6. Housing; 61. First outer shell; 611. Snap-fit ​​part; 612. Glue dispensing groove; 613. Limiting rib; 62. Second outer shell; 621. First buckle; 622. Second buckle; 63. First through hole; 64. Clearance hole; 65. Third mounting part; 7. Waterproof and breathable membrane; 8. Flexible component; 81. Limiting part; 82. Mounting cavity; 821. Connecting rib; 83. First groove; 9. Support component; 91. Second through hole; 10. First sealing component; 201. Pin; 202. Mounting base; 30. Second sealing component. Detailed Implementation

[0030] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0031] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0032] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0033] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0035] According to one embodiment of this application, a refrigerant sensor is provided. For example... Figures 1 to 6 The refrigerant sensor shown includes a substrate 1, a detection unit 2, a heating unit 3, and a gas channel 4. The substrate 1 has a first mounting portion 11; the detection unit 2 and the heating unit 3 are disposed on the first mounting portion 11; the gas channel 4 has a first port and a second port, the first port is connected to the first mounting portion 11 and is disposed around the outer periphery of the detection unit 2 and the heating unit 3, and the second port is adapted to communicate with the outside of the refrigerant sensor.

[0036] In this example, detection unit 2 can detect refrigerant. Heating unit 3 can release heat, thereby increasing the temperature of the surrounding environment of detection unit 2, providing an accurate humidity compensation signal for refrigerant detection, improving the detection accuracy of the refrigerant sensor, and ensuring sufficient detection accuracy even in low-temperature environments. The first port of gas channel 4 is connected to the first mounting part 11 and is arranged around the outer periphery of detection unit 2 and heating unit 3. That is, detection unit 2 and heating unit 3 are located in gas channel 4. Gas channel 4 has a heat preservation effect, which helps to maintain a uniform ambient temperature of detection unit 2, thereby meeting the heating requirements while reducing the power of heating unit 3, thus reducing energy consumption. Refrigerant gas can enter from the second port of gas channel 4 and then reach the surface of detection unit 2 along gas channel 4, causing the refrigerant sensor to work, shortening the response time of the refrigerant sensor, ensuring detection accuracy, that is, detecting refrigerant leaks more quickly and eliminating safety hazards.

[0037] It should be noted that the refrigerant sensor can also be used to detect other gases; that is, the corresponding detection unit 2 can be replaced according to the gas being detected. Those skilled in the art can determine this based on the actual situation, and no specific limitations are made here.

[0038] In this example, a circuit board can be used as substrate 1, and the detection unit 2 and heating unit 3 can be electronic components mounted on the circuit board, thereby simplifying the structure and improving the compactness and integration of the refrigerant sensor. The heating unit 3 can be a surface-mount resistor, which achieves heating, significantly reducing product manufacturing costs.

[0039] In this example, the first port is connected to the first mounting part 11 and is arranged around the outer periphery of the detection unit 2 and the heating unit 3. That is, one end of the gas channel 4 is connected to the first mounting part 11 and can cover the detection unit 2 and the heating unit 3 so that the detection unit 2 and the heating unit 3 can be located inside the gas channel 4.

[0040] like Figure 3 As shown, in this example, the detection unit 2 and the heating unit 3 are located on the first mounting part 11. The first port of the gas channel 4 is connected to the first mounting part 11 and is arranged around the outer periphery of the detection unit 2 and the heating unit 3. The heating unit 3 can heat the environment of the detection unit 2. The gas channel 4 has a heat preservation effect, which is beneficial to improving the uniformity of the ambient temperature around the detection unit 2. Furthermore, the refrigerant can flow directly from the gas channel 4 to the detection unit 2, which can shorten the response time of the refrigerant sensor and improve the detection accuracy.

[0041] In one example, the first port is sealed to the first mounting portion 11. That is, the gas passage 4 can seal the heating unit 3 and the detection unit 2 within the gas passage 4. When the refrigerant enters the gas passage 4 from the second port and then flows to the first port, the refrigerant can be prevented from flowing out from the first port because the first port is sealed to the first mounting portion 11.

[0042] For example, the first port can be welded to the first mounting part 11 to achieve a sealed connection, or a sealing ring can be provided between the first port and the first mounting part 11 for sealing. Those skilled in the art can decide according to the actual situation, and no specific limitation is made here.

[0043] In one example, such as Figure 4 As shown, there are multiple heating units 3, which are arranged around the outer periphery of the detection unit 2.

[0044] In this example, multiple heating units 3 are spaced apart around the outer periphery of the detection unit 2 to ensure that heat is evenly transferred inward from all sides. The heating units 3 can be thick-film resistors, and multiple resistors are combined in a "series-then-parallel" configuration; that is, several resistors are first connected in series as a group, and then these groups of series-connected resistors are connected in parallel as branches. This distributed design achieves power distribution.

[0045] It should be noted that heating units 3 can be set to four, five, or six, etc., which can be determined by those skilled in the art according to the actual situation, and no specific limitation is made here.

[0046] In this example, multiple detection units 2 can be arranged at intervals, allowing multiple detection units 2 to perform refrigerant detection simultaneously, thereby improving detection accuracy. Each detection unit 2 has multiple heating units 3 arranged around its outer periphery, or multiple heating units 3 can be arranged at intervals around the outer periphery of multiple detection units 2. Of course, the specific arrangement of the heating units 3 in the detection units 2 can be determined by those skilled in the art based on actual conditions, and is not specifically limited here.

[0047] In one example, such as Figure 2 and Figure 4 As shown, the refrigerant sensor also includes a control unit 5, which is electrically connected to the heating unit 3.

[0048] In this example, the control unit 5 includes a microcontroller (MCU) and switching devices (such as MOSFETs) to regulate the power applied to the heating unit 3 in order to achieve precise control of the temperature within the gas channel 4.

[0049] In one example, such as Figure 2 and Figure 4As shown, the substrate 1 is provided with a second mounting part 12, the control unit 5 is disposed on the second mounting part 12, and a heat insulation area is provided between the first mounting part 11 and the second mounting part 12.

[0050] In this example, the control unit 5 is located in the second mounting portion 12, and the heating unit 3 and the detection unit 2 are located in the first mounting portion 11. This improves the compactness of the gas channel 4, facilitating the environment for heating the detection unit 2. A heat insulation zone is provided between the first mounting portion 11 and the second mounting portion 12, which provides heat insulation to reduce heat loss, improve heating efficiency, and reduce power consumption.

[0051] For example, such as Figure 4 As shown, a perforated portion 14 is provided between the first mounting portion 11 and the second mounting portion 12, forming a heat insulation zone. The heat conduction effect of the perforated portion 14 is relatively poor. The perforated portion 14 is a through hole penetrating the substrate 1, and the through hole can be formed by mechanical cutting.

[0052] Alternatively, a material with poor thermal conductivity can be placed between the first mounting part 11 and the second mounting part 12 to form an insulation zone and achieve an insulation effect. Those skilled in the art can decide based on the actual situation, and no specific limitations are made here.

[0053] like Figure 4 As shown, in this example, a connecting portion 13 is also provided between the first mounting portion 11 and the second mounting portion 12. The first mounting portion 11 is connected to the second mounting portion 12 through the connecting portion 13, with the substrate 1 as an integral structure, to facilitate assembly.

[0054] It should be noted that the connecting part 13 can also be used for wiring. For example, the connecting wire between the control unit 5 and the heating unit 3 can be routed through the connecting part 13. Also, the wiring of the detection unit 2 can pass through the connecting part 13.

[0055] like Figure 4 As shown, in this example, perforations are provided along the thickness direction of the substrate 1 to separate the first mounting portion 11 and the second mounting portion 12. The perforations surround the outer periphery of the first mounting portion 11. The perforations form a heat insulation zone, and the unperforated portions can form a connecting portion 13.

[0056] It should be noted that, as Figure 4 As shown, multiple cutout portions 14 can be spaced apart, thereby forming a connecting portion 13 between two adjacent cutout portions 14. That is, multiple connecting portions 13 can improve the connection stability between the first mounting portion 11 and the second mounting portion 12. The multiple cutout portions 14 are spaced apart along the outer periphery of the first mounting portion 11, which helps to improve the heat insulation effect and ensure the uniformity of the ambient temperature around the detection unit 2.

[0057] In one example, such as Figures 1 to 3 As shown, the refrigerant sensor also includes a housing 6, the substrate 1 and the gas channel 4 are disposed inside the housing 6, the housing 6 is provided with a first through hole 63, and the second port is connected to the first through hole 63.

[0058] In this example, substrate 1 is disposed within housing 6, providing protection for substrate 1 and the electronic components on it. The sidewall of housing 6 has a first through-hole 63, which connects the interior and exterior of housing 6. Gas channel 4 is located within housing 6, and its second port connects to the first through-hole 63, allowing it to connect to the exterior of the refrigerant sensor.

[0059] It should be noted that the second port and the first through hole 63 can be sealed to prevent refrigerant from leaking into other parts of the housing 6, so that all the refrigerant can enter the gas channel 4 and reach the detection unit 2 more quickly, which helps to shorten the response time of the refrigerant sensor.

[0060] like Figure 1 As shown, in this example, the first through hole 63 can be composed of multiple small holes spaced apart, thereby preventing large particles of impurities from entering the first through hole 63.

[0061] In one example, such as Figure 2 and Figure 3 As shown, the refrigerant sensor also includes a waterproof and breathable membrane 7, which is disposed between the second port and the first through hole 63. The opposite ends of the waterproof and breathable membrane 7 are respectively sealed and connected to the second port and the first through hole 63.

[0062] In this example, the waterproof and breathable membrane 7 has the effect of being waterproof and breathable. The refrigerant gas can pass smoothly through the waterproof and breathable membrane 7 to enter the gas channel 4, while the water can be isolated by the waterproof and breathable membrane 7 to prevent water from entering the gas channel 4 and affecting the detection of the detection unit 2. It can also prevent water from damaging electronic components such as the heating unit 3 and the detection unit 2.

[0063] In this example, the two opposite ends of the waterproof and breathable membrane 7 are respectively sealed to the second port and the first through hole 63. For example, sealant can be provided at the two opposite ends of the waterproof and breathable membrane 7, or sealing protrusions or other sealing structures can be provided at corresponding positions on the second port and the housing 6 to seal with the waterproof and breathable membrane 7. Of course, those skilled in the art can determine the specific sealing structure according to the actual situation, and no specific limitation is made here.

[0064] like Figure 6As shown, in this example, the inner wall of the housing 6 is provided with a mounting area, and a first through hole 63 is provided in the mounting area. A waterproof and breathable membrane 7 is provided with double-sided adhesive at one end facing the first through hole 63. The waterproof and breathable membrane 7 is bonded to the mounting area by the double-sided adhesive and forms a seal with the first through hole 63.

[0065] In one example, such as Figure 3 As shown, the gas channel 4 includes a first receiving cavity 41, a second receiving cavity 43, and a first channel 42. The first receiving cavity 41 and the second receiving cavity 43 are connected by the first channel 42. The inner diameter of the first receiving cavity 41 and the second receiving cavity 43 is larger than the inner diameter of the first channel 42.

[0066] In this example, the first receiving cavity 41 and the second receiving cavity 43 are connected by the first channel 42. The inner diameter of the first receiving cavity 41 and the second receiving cavity 43 is larger than the inner diameter of the first channel 42. The design of the first gas receiving cavity and the second gas receiving cavity is for the temporary storage of gas, which is conducive to the flow of gas inside and outside the gas channel 4, thereby increasing the speed of refrigerant gas flow to the detection unit 2.

[0067] In this example, one end of the first receiving cavity 41 is connected to the waterproof and breathable membrane 7, the end of the first receiving cavity 41 away from the waterproof and breathable membrane 7 is connected to the first channel 42, the end of the first channel 42 away from the first receiving cavity 41 is connected to the second receiving cavity 43, and the heating unit 3 and the detection unit 2 are located in the second receiving cavity 43.

[0068] In one example Figure 2 and Figure 3 As shown, the refrigerant sensor also includes a flexible member 8 and a support member 9. The flexible member 8 has a second channel, and the support member 9 has a third channel. The second channel is connected to the third channel to form the gas channel 4. The flexible member 8 covers the support member 9, and one end of the support member 9 is connected to the first mounting part 11.

[0069] In this example, the flexible element 8 facilitates a sealed connection. The flexible element 8 covers the support element 9, and the support element 9 provides support for the flexible element 8, which helps to reduce the thickness of the flexible element 8. The flexible element 8 and the support element 9 are respectively provided with a second channel and a third channel that are interconnected. The end of the second channel away from the third channel forms a second opening end, and the end of the third channel away from the second channel forms a first opening end. The second channel and the third channel can form a gas channel 4.

[0070] The support member 9 can be made of metal and can be welded to the substrate 1. For example, the support member 9 can be made of nickel-plated brass, nickel-plated brass, or nickel-plated iron. The flexible member 8 can be made of soft plastic, such as silicone or rubber. Of course, the specific materials of the support member 9 and the flexible member 8 can be determined by those skilled in the art based on the actual situation, and no specific limitation is made here.

[0071] It should be noted that the first receiving cavity 41 and the first channel 42 together form the second channel. For example... Figure 2 and Figure 3 As shown, the flexible member 8 has a first groove 83 at one end facing the first waterproof and breathable membrane 7, and the open end of the first groove 83 can surround the waterproof and breathable membrane 7 to form a first receiving cavity 41. The flexible member 8 also has a first channel 42, and the opening at one end of the first channel 42 is located on the bottom wall of the first groove 83. The third channel can form a second receiving cavity 43.

[0072] like Figure 5 As shown, the flexible component 8 has a mounting cavity 82 at the end opposite to the first groove 83. A support component 9 can be disposed within the mounting cavity 82. One end of the support component 9 has a second through hole 91, through which the first channel 42 connects to the third channel. The inner wall of the mounting cavity 82 is also provided with connecting ribs 821, which can press against the outer wall of the support component 9 to prevent the support component 9 from falling off during assembly, thus improving manufacturability.

[0073] like Figure 3 As shown, a first sealing element 10 is provided between the second channel and the third channel. An annular protrusion is provided at one end of the second channel facing the third channel; this annular protrusion is the first sealing element 10. When the support member 9 can be disposed in the mounting cavity 82, the annular protrusion can abut against the end of the support member 9. The annular protrusion surrounds the outer periphery of the second through hole 91, thereby forming a seal. Alternatively, the first sealing element 10 can also be a sealing ring or other sealing structure disposed between the second and third channels; those skilled in the art can determine this according to the actual situation, and no specific limitation is made here.

[0074] In one example, such as Figure 2 and Figure 5 The flexible member 8 has a limiting part 81, which can abut against the substrate 1 to limit the substrate 1.

[0075] In this example, both the substrate 1 and the flexible member 8 are disposed within the housing 6. The flexible member 8 is provided with a limiting part 81. During assembly, the limiting part 81 can abut against the side of the substrate 1, thereby limiting the substrate 1 to improve assembly accuracy and enhance the stability of the substrate 1 assembly.

[0076] For example, the limiting part 81 can be two limiting posts, which can respectively abut against the opposite two sides of the substrate 1. Alternatively, the limiting part 81 can be pressed against the surface of the substrate 1 along the thickness direction to fix and limit the substrate 1. Of course, the specific cooperation method between the limiting part 81 and the substrate 1 can be determined by those skilled in the art according to the actual situation, and no specific limitation is made here.

[0077] like Figure 1 and Figure 2 As shown, the housing 6 includes a first outer shell 61 and a second outer shell 62. At least one of the first outer shell 61 and the second outer shell 62 is provided with a groove. The first outer shell 61 and the second outer shell 62 are connected to each other to form a cavity inside the housing 6. Structures such as the substrate 1 and the gas channel 4 are disposed in the cavity. The first through hole 63 can be provided on the side wall of the first outer shell 61. Those skilled in the art can determine this according to the actual situation, and no specific limitation is made here.

[0078] For example, such as Figure 2 As shown, the second outer shell 62 is provided with a groove, and the inner wall of the groove is provided with a first buckle 621. The substrate 1 is disposed in the groove and can be engaged with the first buckle 621, thereby improving the assembly stability of the substrate 1. For example, the first buckle 621 is a locking post provided on opposite side walls of the groove, and the opposite sides of the substrate 1 can respectively abut against the locking posts on the side walls, thereby fixing and limiting the substrate 1. And, as... Figure 6 As shown, the inner wall of the first outer shell 61 is also provided with one or more limiting ribs 613. After the first outer shell 61 is connected to the second outer shell 62, the limiting ribs 613 can press down on the substrate 1, thereby further improving the firmness of the substrate 1 and improving the reliability of the refrigerant sensor. Alternatively, the substrate 1 can also be fixedly connected to the inside of the shell 6 by screws or other fasteners. Of course, the specific fixing method of the substrate 1 can be determined by those skilled in the art according to the actual situation, and no specific limitation is made here.

[0079] like Figure 1 and Figure 2 As shown, the outer wall of the housing 6 is also provided with a third mounting portion 65, through which the housing 6 can be assembled to an external device. For example, the third mounting portion 65 has a screw hole, and the housing 6 can be fastened to the external device by fasteners.

[0080] In this example, such as Figure 2 and Figure 6As shown, the first outer shell 61 and the second outer shell 62 can be snapped together, which is simple and convenient for disassembly and installation. For example, the first outer shell 61 is provided with a snap-fit ​​part 611, and the second outer shell 62 is provided with a second snap fastener 622. When the first outer shell 61 and the second outer shell 62 are assembled, the snap-fit ​​part 611 can snap into the second snap fastener 622. For example, the snap-fit ​​part 611 is a slot provided in the first outer shell 61, and the second snap fastener 622 is a locking block provided in the second outer shell 62, which can be locked into the slot.

[0081] like Figure 6 As shown, in this example, the open end of the first housing 61 is also provided with a dispensing groove 612, which is arranged circumferentially around the first housing 61. The dispensing groove 612 can be used to hold sealant or a sealing ring. The open end of the second housing 62 can be inserted into the dispensing groove 612, thereby enabling the first housing 61 and the second housing 62 to be sealed together, thus achieving the function of waterproofing and dustproofing.

[0082] It should be noted that the first outer shell 61 and the second outer shell 62 can be made of plastic. Those skilled in the art can decide according to the actual situation, and no specific limitation is made here.

[0083] like Figures 1 to 4 As shown, in this example, the refrigerant sensor also includes a pin header, which is electrically connected to the substrate 1. The side wall of the second housing 62 is also provided with a clearance hole 64, into which the pin 201 of the pin header can be inserted. The pin 201 is used to electrically connect the substrate 1 and the port of the external device, and the pin 201 can transmit signals and current.

[0084] As shown in the figure Figure 2 and Figure 3 As shown, in this example, the pin header includes a mounting base 202 and a plurality of pins 201. The plurality of pins 201 are mounted on the mounting base 202, and one end of the pins 201 is soldered to the substrate 1 to achieve electrical connection with the substrate 1.

[0085] like Figure 2 and Figure 3 As shown, in this example, the refrigerant sensor also includes a second seal 30, which seals the space between the clearance hole 64 and the inner cavity of the housing 6, providing waterproofing and dustproofing. The second seal 30 has through holes corresponding to the number of pins 201, with each pin 201 able to pass through one through hole. During assembly, the pins 201 pass through the second seal 30, which is located within the inner cavity of the housing 6. One end of the second seal 30 abuts against the inner wall of the housing 6 and covers the clearance hole 64, thus sealing it. The other end of the second seal 30 abuts against the mounting base 202, thereby securing the second seal 30.

[0086] The second sealing element 30 can be made of soft rubber, such as silicone or rubber. Those skilled in the art can determine the material according to the actual situation, and no specific limitation is made here.

[0087] According to another embodiment of this application, an electrical device is provided. This electrical device includes the refrigerant sensor described in the above embodiments. The electrical device can be a refrigerator, air conditioner, cold storage, chemical refrigeration equipment, or similar product. The refrigerant sensor is installed within the electrical device and can be used for refrigerant leak detection.

[0088] The above embodiments mainly describe the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. For the sake of brevity, they will not be elaborated here.

[0089] While specific embodiments of the invention have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of the invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A refrigerant sensor, characterized in that, include: The substrate (1) is provided with a first mounting portion (11). The detection unit (2) and the heating unit (3) are located in the first mounting part (11). Gas channel (4) has a first port and a second port. The first port is connected to the first mounting part (11) and is arranged around the outer periphery of the detection unit (2) and the heating unit (3). The second port is adapted to communicate with the external of the refrigerant sensor.

2. The refrigerant sensor according to claim 1, characterized in that, The first port is sealed and connected to the first mounting part (11).

3. The refrigerant sensor according to claim 1, characterized in that, The heating unit (3) is provided in multiple units, and the multiple heating units (3) are arranged around the outer periphery of the detection unit (2).

4. The refrigerant sensor according to claim 1, characterized in that, The refrigerant sensor also includes a control unit (5), which is electrically connected to the heating unit (3).

5. The refrigerant sensor according to claim 4, characterized in that, The substrate (1) is provided with a second mounting part (12), the control unit (5) is disposed on the second mounting part (12), and a heat insulation area is provided between the first mounting part (11) and the second mounting part (12).

6. The refrigerant sensor according to claim 5, characterized in that, The heat insulation area includes a hollow part (14), and a connecting part (13) is provided between the first mounting part (11) and the second mounting part (12).

7. The refrigerant sensor according to claim 1, characterized in that, The refrigerant sensor also includes a housing (6), the substrate (1) and the gas channel (4) are disposed in the housing (6), the housing (6) is provided with a first through hole (63), and the second port is connected to the first through hole (63).

8. The refrigerant sensor according to claim 7, characterized in that, The refrigerant sensor also includes a waterproof and breathable membrane (7), which is disposed between the second port and the first through hole (63). The two ends of the waterproof and breathable membrane (7) are respectively sealed to the second port and the first through hole (63).

9. The refrigerant sensor according to claim 1, characterized in that, The gas channel (4) includes a first receiving cavity (41), a second receiving cavity (43) and a first channel (42). The first receiving cavity (41) and the second receiving cavity (43) are connected by the first channel (42). The inner diameter of the first receiving cavity (41) and the second receiving cavity (43) is larger than the inner diameter of the first channel (42).

10. The refrigerant sensor according to claim 1, characterized in that, The refrigerant sensor also includes a flexible element (8) and a support element (9). The flexible element (8) has a second channel, and the support element (9) has a third channel. The second channel is connected to the third channel to form the gas channel (4). The flexible element (8) covers the support element (9), and one end of the support element (9) is connected to the first mounting part (11).

11. The refrigerant sensor according to claim 10, characterized in that, A first seal (10) is provided between the second channel and the third channel.

12. The refrigerant sensor according to claim 10, characterized in that, The flexible member (8) has a limiting part (81) that can abut against the substrate (1) to limit the substrate (1).

13. An electrical appliance, characterized in that, Including the refrigerant sensor as described in any one of claims 1 to 12.

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