Liquid level switch device capable of detecting temperature

Abstract

The utility model relates to the technical field of liquid level detection, in particular to a liquid level switch device capable of detecting temperature, which is characterized by comprising a liquid level switch body and a temperature detection circuit, the liquid level switch body comprises at least one liquid level switch circuit positioned in an inner cavity of the liquid level switch body, and the temperature detection circuit is arranged in the inner cavity. And an insulator for isolating or positioning the temperature detection circuit and the liquid level switch circuit is arranged in the inner cavity. The temperature and the liquid level can be detected at the same time, the requirements for temperature detection and liquid level detection can be met through one-time installation and positioning, the assembly amount of workers can be reduced, the assembly efficiency of the workers can be improved, the use amount of materials can be reduced, and therefore the labor cost and the material cost can be reduced; and the temperature sensor can be positioned on the inner side of the liquid to detect the temperature, so that the accuracy of temperature detection and control can be improved, and potential safety hazards can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid level detection, in particular to a liquid level switch device capable of detecting temperature. Background Art

[0002] As a switch for detecting the height of a liquid, the liquid level switch has two control modes: normally closed and normally open, and it has a very wide range of uses. It can be used in water towers, intelligent toilets, cold fans, coffee machines, water dispensers, electric irons, fuel tanks, freezers, wine coolers, etc. Specifically, for example, in the water tank of a cold fan that adds water, when the water is used up or the remaining amount is insufficient, it will notify the electronic control board to cut off the power and stop working or give an alarm to prompt adding water.

[0003] Among them, it is often necessary to detect the temperature of the liquid where the liquid level switch is used. For example, in cold fans, coffee machines, water dispensers, electric irons, fuel tanks, freezers, wine coolers, etc. For this reason, a liquid level switch and a temperature detection circuit are often installed on some products at the same time. In this way, the installation and positioning of the liquid level switch and the temperature detection circuit will be involved in related products. This will not only increase the assembly difficulty of related products, but also require separate auxiliary structures to position the liquid level switch and the temperature detection circuit respectively. This will not only increase the assembly volume of workers and reduce the assembly efficiency, but also increase the material usage, thus easily increasing the labor and material costs. And in order to protect the temperature detection circuit, generally the temperature detection circuit is set on the wall of the container containing the liquid, so as to indirectly detect the temperature of the liquid by detecting the temperature of the container wall. In this way, the accuracy of temperature detection is relatively low, which is likely to result in inaccurate temperature control, and thus is likely to bring potential safety hazards.

[0004] Therefore, it is very necessary to design a liquid level switch device capable of detecting temperature to solve the above technical problems. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the above problems and deficiencies, and provide a liquid level switch device capable of detecting temperature. This liquid level switch device can detect temperature and liquid level at the same time. In this way, the requirements for temperature detection and liquid level detection can be obtained through one installation and positioning. This can not only help reduce the assembly volume of workers and improve the assembly efficiency of workers, but also help reduce the material usage, thus helping to reduce the labor and material costs. And it can also detect the temperature inside the liquid, which is beneficial to improving the accuracy of temperature detection and control, and thus is beneficial to reducing potential safety hazards.

[0006] The technical solution of the utility model is realized as follows:

[0007] A liquid level switch device capable of detecting temperature, characterized in that it includes a liquid level switch body and a temperature detection circuit. The liquid level switch body includes at least one liquid level switch circuit located in its inner cavity. The temperature detection circuit is arranged in the inner cavity, and an insulator for isolating or positioning the temperature detection circuit and the liquid level switch circuit is arranged in the inner cavity.

[0008] Preferably, the liquid level switch body further includes an insulating cylinder with one end closed and magnetic floats having the same number as the liquid level switch circuits. The inner hole of the insulating cylinder forms the inner cavity. The magnetic floats are slidably arranged on the insulating cylinder along the length direction of the insulating cylinder. The liquid level switch circuit includes a reed switch and two wires, and the two wires are electrically connected to the two pins of the reed switch respectively. The reed switch is placed in the inner cavity.

[0009] Preferably, the magnetic float includes a foamed floating ring and a permanent magnet ring. The foamed floating ring is coated on the permanent magnet ring, and the permanent magnet ring is arranged around the inner hole of the foamed floating ring. The foamed floating ring is slidably sleeved on the insulating cylinder.

[0010] Preferably, a convex ring portion and an external thread are respectively arranged on the outer circumferential surface of the open end of the insulating cylinder, and the convex ring portion is located at the inner end of the external thread. A nut is screwed on the external thread, and a silica gel ring is sleeved on the insulating cylinder between the nut and the convex ring portion.

[0011] Preferably, at least one positioning ring groove is formed on the outer circumferential surface of the closed end of the insulating cylinder, and at least one C-shaped card is clamped on the positioning ring groove.

[0012] Preferably, the temperature detection circuit includes an NTC thermistor and two wires. The two wires are electrically connected to the two pins of the NTC thermistor respectively. The insulator is an insulating layer coated on the NTC thermistor, the two pins of the NTC thermistor, and the connection points between the two pins of the NTC thermistor and the two wires.

[0013] Preferably, the temperature detection circuit includes an NTC thermistor and two wires. The two wires are electrically connected to the two pins of the NTC thermistor respectively. The insulator is two insulating sleeves, and the two insulating sleeves are respectively sleeved on the two pins of the NTC thermistor and the connection points between the two pins of the NTC thermistor and the two wires.

[0014] Preferably, the temperature detection circuit includes an NTC thermistor and two wires. The two wires are electrically connected to the two pins of the NTC thermistor respectively. The insulator is an insulating sleeve sleeved on the liquid level switch circuit. An insulating tube is sleeved on one of the pins of the NTC thermistor, and the insulating tube is also sleeved on the connection point between the corresponding pin of the NTC thermistor and the wire.

[0015] Preferably, the insulator is a PCB board, and both the temperature detection circuit and the liquid level switch circuit are formed on the PCB board.

[0016] Preferably, the insulator is a PCB board, there are two liquid level switch circuits, and both the temperature detection circuit and the two liquid level switch circuits are formed on the PCB board.

[0017] Advantages of the present utility model: In this liquid level switch device, not only is there a liquid level switch circuit in the inner cavity of the liquid level switch body, but also a temperature detection circuit, and there is an insulator in the inner cavity for isolating or positioning the temperature detection circuit and the liquid level switch circuit. This can ensure that the liquid level switch circuit and the temperature detection circuit can function more accurately and stably, thereby facilitating the acquisition of stable and reliable liquid level detection and temperature detection. Furthermore, this liquid level switch device can stably detect temperature and liquid level simultaneously. Therefore, when installing this liquid level switch device, the requirements for temperature detection and liquid level detection can be obtained with one-time installation and positioning. This can not only facilitate reducing the assembly volume of workers and improving the assembly efficiency of workers, but also facilitate reducing the material usage, thereby facilitating the reduction of labor and material costs. Since the temperature detection circuit is located in the inner cavity of the liquid level switch body, this can make the temperature detection circuit located inside the liquid, which can detect the temperature inside the liquid, thereby facilitating the improvement of the accuracy of temperature detection and control, and further facilitating the reduction of potential safety hazards. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the first sub-scheme in the present utility model.

[0019] Figure 2 It is one of the schematic structural diagrams of the liquid level switch circuit in the present utility model.

[0020] Figure 3 It is one of the schematic structural diagrams of the temperature detection circuit in the present utility model.

[0021] Figure 4 It is a schematic structural diagram of the second sub-scheme in the present utility model.

[0022] Figure 5 It is the second schematic structural diagram of the temperature detection circuit in the present utility model.

[0023] Figure 6 It is a schematic structural diagram of the third sub-scheme in the present utility model.

[0024] Figure 7 It is the second schematic structural diagram of the liquid level switch circuit in the present utility model.

[0025] Figure 8 It is the third schematic structural diagram of the temperature detection circuit in the present utility model.

[0026] Figure 9 This is a schematic structural diagram of the fourth subdivision solution in the present utility model.

[0027] Figure 10 This is one of the schematic structural diagrams of the components related to PCB board positioning in the present utility model.

[0028] Figure 11 This is a schematic structural diagram of the fifth subdivision solution in the present utility model.

[0029] Figure 12 This is another schematic structural diagram of the components related to PCB board positioning in the present utility model.

[0030] Figure 13 This is one of the schematic structural diagrams of the liquid level switch body in the present utility model.

[0031] Figure 14 This is another schematic structural diagram of the liquid level switch body in the present utility model.

[0032] Figure 15 This is the third schematic structural diagram of the liquid level switch body in the present utility model.

[0033] Figure 16 This is the fourth schematic structural diagram of the liquid level switch body in the present utility model.

[0034] Figure 17 This is a schematic structural diagram of the insulating cylinder in the present utility model.

[0035] Figure 18 This is one of the schematic structural diagrams of the PCB board in the present utility model.

[0036] Figure 19 This is another schematic structural diagram of the PCB board in the present utility model.

[0037] Figure 20 This is a schematic structural diagram of the magnetic float in the present utility model.

[0038] Figure 21 This is a schematic structural diagram of the C-shaped card in the top view direction in the present utility model.

[0039] Figure 22 This is a schematic structural diagram of the C-shaped card in the sectional view in the present utility model. Detailed implementation manners

[0040] Such as Figure 1As shown in the figure, a liquid level switch device capable of detecting temperature according to the present utility model includes a liquid level switch body 1 and a temperature detection circuit 2. The liquid level switch body 1 includes at least one liquid level switch circuit 3 located in its inner cavity 10. The temperature detection circuit 2 is arranged in the inner cavity 10, and an insulator 4 for isolating or positioning the temperature detection circuit 2 and the liquid level switch circuit 3 is arranged in the inner cavity 10.

[0041] In this liquid level switch device, in the inner cavity 10 of the liquid level switch body 1, there is not only the liquid level switch circuit 3 but also the temperature detection circuit 2, and there is also an insulator 4 for isolating or positioning the temperature detection circuit 2 and the liquid level switch circuit 3 in the inner cavity 10. This can ensure that the liquid level switch circuit 3 and the temperature detection circuit 2 can function more accurately and stably, so as to facilitate obtaining stable and reliable liquid level detection and temperature detection. Furthermore, this liquid level switch device can stably detect temperature and liquid level simultaneously. Therefore, when installing this liquid level switch device, the requirements for temperature detection and liquid level detection can be met with one-time installation and positioning. This can not only facilitate reducing the assembly volume of workers and improving the assembly efficiency of workers, but also help reduce the material usage, thereby facilitating reducing the labor and material costs.

[0042] Since the temperature detection circuit 2 is located in the inner cavity of the liquid level switch body 1, the temperature detection circuit 2 can be located inside the liquid, so that the temperature can be detected inside the liquid, which is beneficial to improving the accuracy of temperature detection and control, and further beneficial to reducing potential safety hazards.

[0043] Setting the temperature detection circuit 2 and the liquid level switch circuit 3 inside the liquid level switch body 1, that is, setting the temperature detection circuit 2 and the liquid level switch circuit 3 in the inner cavity 10, can enable the temperature detection circuit 2 and the liquid level switch circuit 3 to function stably and accurately, thus ensuring that this liquid level switch device has very high reliability.

[0044] On the basis of the above structure, the present utility model provides five subdivided liquid level switch devices. Among them, Figures 1 to 3 As shown, it is the first subdivision scheme; Figures 4 to 6 As shown, it is the second subdivision scheme; Figures 7 to 9 As shown, it is the third subdivision scheme; Figure 10 And Figure 11 As shown, it is the fourth subdivision scheme; Figure 12 And Figure 13 As shown, it is the fifth subdivision scheme.

[0045] Such as Figure 2 、 Figures 13 to 16As shown, the liquid level switch body 1 further includes an insulating cylinder 11 with one end closed and magnetic floats 12 having the same number as the liquid level switch circuits 3. The inner hole of the insulating cylinder 11 forms an inner cavity 10. The magnetic floats 12 are slidably arranged on the insulating cylinder 11 along the length direction of the insulating cylinder 11. The liquid level switch circuit 3 includes a reed switch 31 and two wires 32. The two wires 32 are electrically connected to the two pins of the reed switch 31 respectively, and the reed switch 31 is placed in the inner cavity 10. In this way, the reed switch 31 can be actuated by the magnetic float 12, so as to meet the requirement of accurately detecting the liquid level. Such a liquid level switch device is very stable and reliable. By using the insulating cylinder 11, it can prevent the temperature detection circuit 2 and the liquid level switch circuit 3 from interfering with each other through other components of the liquid level switch body 1, which helps to further improve the performance.

[0046] The insulating cylinder 11 is made of an insulating rubber cylinder, for example, made of insulating plastic, which not only facilitates manufacturing but also provides good insulation.

[0047] As Figures 13 to 16 shown, the reed switch 31 has two structures: normally open and normally closed. When using the normally open reed switch 31, the two contacts of the reed switch 31 are in an open state. When the liquid level decreases, the magnetic float 12 drops, and the magnetic field acting on the reed switch 31 by the magnetic float 12 increases, causing the reed switch 31 to enter a closed state. When the liquid level increases, the magnetic float 12 rises, the magnetic float 12 moves away from the reed switch 31, and the magnetic field acting on the reed switch 31 by the magnetic float 12 weakens. At this time, the reed switch 31 enters an open state. When the reed switch 31 conducts or disconnects, it will give a signal to the main control board of the relevant product, so that the height of the liquid can be detected by using this signal. When using the normally closed reed switch 31, it is opposite to the normally open reed switch 31 and will not be elaborated here, which can be clearly obtained through the above description.

[0048] As Figure 2 shown, the wire 32 is a wire with an insulating skin, and the wire core at the end of the wire 32 is exposed and soldered and fixed to the pin of the reed switch 31. Such a liquid level switch circuit 3 is very stable and reliable, which can ensure that the performance of the liquid level switch device is very good.

[0049] As Figures 13 to 16 、 Figure 20 shown, the magnetic float 12 includes a foamed floating ring 121 and a permanent magnet ring 122. The foamed floating ring 121 is coated on the permanent magnet ring 122, and the permanent magnet ring 122 is arranged around the inner hole of the foamed floating ring 121. The foamed floating ring 121 is slidably sleeved on the insulating cylinder 11. Such a magnetic float 12 not only has a very good floating effect but also can generate a very good magnetic field effect, which is beneficial to improving the accuracy of the reed switch 31's actuation and further beneficial to improving the accuracy of liquid level detection.

[0050] The foamed floating ring 121 is made of foamed rubber, so that the foamed floating ring 121 has good buoyancy.

[0051] As Figures 13 to 16 shown, in the actual manufacturing process, the permanent magnet ring 122 can be located at different axial positions of the foamed floating ring 121, and the reed switch 31 can be located at different axial positions of the insulating cylinder 11, so as to facilitate obtaining various liquid level detection requirements, and thus facilitate meeting the requirements of actual manufacturing and use.

[0052] As Figures 13 to 17 shown, convex ring portions 111 and external threads 112 are respectively arranged on the outer circumferential surface of the open end of the insulating cylinder 11, and the convex ring portions 111 are located at the inner ends of the external threads 112. A nut 13 is screwed on the external threads 112, and a silica gel ring 14 is sleeved on the insulating cylinder 11 between the nut 13 and the convex ring portions 111. When installing the liquid level switch device, a through installation hole (not shown in the figure) is opened at the top of the liquid-containing container of the relevant product, so that the external threads 112 pass outwards from the installation hole, the silica gel ring 14 is attached to the outer top surface of the liquid-containing container, the nut 13 is screwed on the external threads 112, and the nut 13 and the outer top surface of the liquid-containing container jointly clamp the silica gel ring 14. The silica gel ring 14 can prevent the nut 13 from loosening. Such a structure is conducive to stably and reliably installing and positioning the upper liquid level switch device, thereby helping to further improve the reliability and applicability of the liquid level switch device.

[0053] As Figures 13 to 17 , Figure 21 and Figure 22 shown, at least one positioning ring groove 113 is opened on the outer circumferential surface of the closed end of the insulating cylinder 11, and at least one C-shaped card 15 is clamped on the positioning ring groove 113. The C-shaped card 15 can be used to prevent the magnetic float 12 from detaching from the insulating cylinder 11, and the installation of the C-shaped card 15 is very convenient, which can not only improve the convenience of assembly, but also help to improve the reliability of the liquid level switch device.

[0054] As Figures 13 to 17 shown, when two positioning ring grooves 113 are opened, C-shaped cards 15 are clamped on both positioning ring grooves 113, and the magnetic float 12 is located between the two C-shaped cards 15. In this way, the movement range of the magnetic float 12 can be accurately limited by the two C-shaped cards 15, so as to help improve the accuracy of action and the reliability of assembly.

[0055] As Figure 11As shown in the figure, when setting two C-shaped cards 15 and two magnetic floats 12, one magnetic float 12 is located between the two C-shaped cards 15, and the other magnetic float 12 is located between the convex ring portion 111 and the C-shaped card 15 close to the convex ring portion 111. This can achieve the purpose of accurately defining the floating range of the two magnetic floats 12, so as to ensure that both magnetic floats 12 can act accurately, and further contribute to improving the reliability of this liquid level switch device.

[0056] In the actual manufacturing process, after the liquid level switch circuit 3 and the temperature detection circuit 2 are both arranged in the inner cavity 10, epoxy resin (not shown in the figure) can be filled in the inner cavity 10 for encapsulation. This can help to accurately and stably position the liquid level switch circuit 3 and the temperature detection circuit 2, so as to help them work accurately and stably, and further help to improve the reliability and applicability of the liquid level switch device.

[0057] As Figure 1 and Figure 3 shown in the figure, the temperature detection circuit 2 includes an NTC thermistor 21 and two wires 22. The two wires 22 are electrically connected to the two pins of the NTC thermistor 21 respectively. The insulator 4 is an insulating layer covering the NTC thermistor 21, the two pins of the NTC thermistor 21, and the connection points between the two pins of the NTC thermistor 21 and the two wires 22. This can not only make the temperature detection circuit 2 have a very stable and reliable temperature detection effect, but also help to form a stable and reliable insulation function, thus contributing to further improving the reliability and applicability of the liquid level switch device. Since the insulating cylinder 11 is adopted, when such a temperature detection circuit 2 is used, there is no need to set an insulating structure on the liquid level switch circuit 3, and it can be directly encapsulated with epoxy resin, which is conducive to manufacturing and ensuring reliability.

[0058] As Figure 3 shown in the figure, the wire 22 is a wire with an insulating skin, and the wire core at the end of the wire 22 is exposed and soldered and fixed to the pin of the NTC thermistor 21. The above insulating layer is formed by encapsulation. Specifically: after the two wires 22 are respectively connected to the two pins of the NTC thermistor 21; they are inserted into the glue solution, and it is ensured that the glue solution is higher than their connection points; then taken out and waited for the glue solution to solidify, and this can form an insulating layer on their surfaces. Such a temperature detection circuit 2 is very stable and reliable, and this can effectively prevent the temperature detection circuit 2 from interfering with the liquid level switch circuit 3, so as to ensure that the use performance of the liquid level switch device is very good.

[0059] As Figure 4 and Figure 5As shown, the temperature detection circuit 2 includes an NTC thermistor 21 and two wires 22. The two wires 22 are electrically connected to the two pins of the NTC thermistor 21 respectively. The insulator 4 is two insulating sleeves 41, and the two insulating sleeves 41 are respectively sleeved on the two pins of the NTC thermistor 21 and the joints of the two pins of the NTC thermistor 21 and the two wires 22. This can not only enable the temperature detection circuit 2 to have a very stable and reliable temperature detection effect, but also facilitate the formation of a stable and reliable insulation effect, thus contributing to further improving the reliability and applicability of the liquid level switch device. Since the insulating cylinder 11 is adopted, when such a temperature detection circuit 2 is used, the liquid level switch circuit 3 does not need to be provided with an insulating structure and can be directly encapsulated with epoxy resin, which is beneficial to manufacturing and ensuring reliability.

[0060] As Figures 6 to 8 shown, the temperature detection circuit 2 includes an NTC thermistor 21 and two wires 22. The two wires 22 are electrically connected to the two pins of the NTC thermistor 21 respectively. The insulator 4 is an insulating sleeve sleeved on the liquid level switch circuit 3. An insulating tube 5 is sleeved on one of the pins of the NTC thermistor 21, and the insulating tube 5 is also sleeved on the joint of the corresponding pin of the NTC thermistor 21 and the wire 22. By setting the insulator 4 in this way and sleeving the insulating tube 5 on one of the pins of the NTC thermistor 21, a very stable and reliable insulation effect can be achieved. This can not only prevent the temperature detection circuit 2 from short-circuiting itself, but also effectively prevent interference between the temperature detection circuit 2 and the liquid level switch circuit 3, thus contributing to further improving the reliability and applicability of the liquid level switch device. Such a structure can also be encapsulated with epoxy resin, which is beneficial to improving the reliability and applicability of the liquid level switch device.

[0061] As Figure 7 shown, when an insulating sleeve is sleeved on the liquid level switch circuit 3, the reed switch 31, the two pins of the reed switch 31, and the joints of these two pins and the wire 32 are all placed inside the insulating sleeve, so that the design requirements can be met.

[0062] As Figure 9 、 Figure 10 and Figure 18 shown, the insulator 4 is a PCB board, and the temperature detection circuit 2 and the liquid level switch circuit 3 are both formed on the PCB board. This is beneficial to improving the stability and accuracy of the installation and positioning of the temperature detection circuit 2 and the liquid level switch circuit 3, thus contributing to further improving the reliability and applicability of the liquid level switch device.

[0063] As Figure 10As shown, when using an NTC thermistor 21 for temperature detection on the temperature detection circuit 2 and a reed switch 31 for liquid level detection on the liquid level switch circuit 3, the two pins of the NTC thermistor 21 and the two pins of the reed switch 31 are soldered onto the PCB board. To form a complete circuit, external wires are soldered at corresponding positions on the PCB board, which can meet the requirements of actual manufacturing and use.

[0064] As Figure 11 , Figure 12 and Figure 19 shown, the insulator 4 is a PCB board, there are two liquid level switch circuits 3, and the temperature detection circuit 2 and the two liquid level switch circuits 3 are all formed on the PCB board. This can facilitate improving the stability and accuracy of the installation and positioning of the temperature detection circuit 2 and the liquid level switch circuit 3, thereby helping to further improve the reliability and applicability of the liquid level switch device. Using two liquid level switch circuits 3 can achieve the purpose of multi-liquid level detection, thus facilitating the expansion of the applicable range.

[0065] As Figure 12 shown, when using an NTC thermistor 21 for temperature detection on the temperature detection circuit 2 and reed switches 31 for liquid level detection on the two liquid level switch circuits 3, the two pins of the NTC thermistor 21 and the two pins of the two reed switches 31 are soldered onto the PCB board, and the two reed switches 31 are arranged side by side along the depth direction of the inner cavity 10. To form a complete circuit, external wires are soldered at corresponding positions on the PCB board, which can meet the requirements of actual manufacturing and use.

[0066] When using the PCB board to position the temperature detection circuit 2 and the liquid level switch circuit 3, epoxy resin (not shown in the figure) can also be filled in the inner cavity 10 for encapsulation, which can facilitate improving the reliability and applicability.

[0067] During the actual manufacturing process, more than two liquid level switch circuits 3 can also be used, that is, more than two reed switches 31 are used to detect the liquid level. During the actual manufacturing process, in order to distinguish the wires of the temperature detection circuit 2 and the liquid level switch circuit 3, wires of different colors can be used, which can facilitate improving the convenience and accuracy of connection and use.

[0068] The above embodiments are the preferred embodiments of the present invention. All structures similar to the present invention and equivalent changes made thereto shall fall within the protection scope of the present invention.

Claims

1. A liquid level switch device capable of detecting temperature, characterized in that: The invention comprises a liquid level switch body (1) and a temperature detection circuit (2), wherein the liquid level switch body (1) comprises at least one liquid level switch circuit (3) located in an inner cavity (10) thereof, the temperature detection circuit (2) is arranged in the inner cavity (10), and an insulator (4) is arranged in the inner cavity (10) for isolating or positioning the temperature detection circuit (2) and the liquid level switch circuit (3).

2. The liquid level switch device capable of detecting temperature according to claim 1, characterized in that: The liquid level switch body (1) further comprises an insulating tube (11) with one end closed, and magnetic floats (12) of the same number as the liquid level switch circuit (3); the inner hole of the insulating tube (11) forms an inner cavity (10); the magnetic floats (12) are slidably arranged on the insulating tube (11) along the length direction of the insulating tube (11); the liquid level switch circuit (3) comprises a reed switch (31) and two electric wires (32); the two electric wires (32) are electrically connected to two pins of the reed switch (31), and the reed switch (31) is arranged in the inner cavity (10).

3. The liquid level switch device capable of detecting temperature according to claim 2, characterized in that: The magnetic float (12) comprises a foaming floating ring (121) and a permanent magnetic ring (122); the foaming floating ring (121) is coated on the permanent magnetic ring (122), and the permanent magnetic ring (122) is arranged around the inner hole of the foaming floating ring (121); the foaming floating ring (121) is slidably mounted on the insulating cylinder (11).

4. The liquid level switch device capable of detecting temperature according to claim 2, characterized in that: A convex ring portion (111) and an external thread (112) are respectively provided on the outer circumferential surface of the open end of the insulating tube (11), and the convex ring portion (111) is located on the inner end of the external thread (112). A nut (13) is threaded onto the external thread (112), and a silicone ring (14) is sleeved on the insulating tube (11) between the nut (13) and the convex ring portion (111).

5. The liquid level switch device capable of detecting temperature according to claim 2, characterized in that: At least one positioning ring groove (113) is provided on the outer circumferential surface of the closed end of the insulating tube (11), and at least one C-shaped card (15) is clamped on the positioning ring groove (113).

6. The liquid level switch device capable of detecting temperature according to any one of claims 1 to 5, characterized in that: The temperature detection circuit (2) comprises an NTC thermistor (21) and two wires (22), the two wires (22) being electrically connected to two pins of the NTC thermistor (21), respectively, and the insulator (4) is an insulating layer covering the NTC thermistor (21), the two pins of the NTC thermistor (21), and the connection between the two pins of the NTC thermistor (21) and the two wires (22).

7. The liquid level switch device capable of detecting temperature according to any one of claims 1 to 5, characterized in that: The temperature detection circuit (2) comprises an NTC thermistor (21) and two wires (22), the two wires (22) being electrically connected to two pins of the NTC thermistor (21), respectively; the insulator (4) is two insulating sleeves (41), the two insulating sleeves (41) being respectively sleeved on the two pins of the NTC thermistor (21) and at the connection between the two pins of the NTC thermistor (21) and the two wires (22).

8. The liquid level switch device capable of detecting temperature according to any one of claims 1 to 5, characterized in that: The temperature detection circuit (2) comprises an NTC thermistor (21) and two wires (22), the two wires (22) being electrically connected to two pins of the NTC thermistor (21), respectively; the insulator (4) is an insulating sleeve sleeved on the liquid level switch circuit (3); an insulating tube (5) is sleeved on one of the pins of the NTC thermistor (21), and the insulating tube (5) is also sleeved on the connection between the corresponding pin of the NTC thermistor (21) and the wire (22).

9. The liquid level switch device capable of detecting temperature according to any one of claims 1 to 5, characterized in that: The insulator (4) is a PCB board, and the temperature detection circuit (2) and the liquid level switch circuit (3) are both formed on the PCB board.

10. The liquid level switch device capable of detecting temperature according to any one of claims 1 to 5, characterized in that: The insulator (4) is a PCB board, there are two liquid level switch circuits (3), and the temperature detection circuit (2) and the two liquid level switch circuits (3) are all formed on the PCB board.

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