A fragrance diffusion device

Abstract

This invention provides a fragrance diffuser, including a storage bottle, a liquid level detection electrode, a reference electrode, and a controller electrically connected to the liquid level detection electrode and the reference electrode. The liquid level detection electrode and the reference electrode are disposed on the outer wall of the storage bottle or located outside the storage bottle. The liquid level detection electrode extends along the liquid level height direction. At least one reference electrode is provided and is located near the bottom of the storage bottle. The controller calculates the liquid level height in the storage bottle based on the detection signals from the liquid level detection electrode and the reference electrode. This device is suitable for detecting the liquid level height of different liquids.

Description

Technical Field

[0001] This invention relates to the field of liquid height detection, and in particular to a fragrance diffuser. Background Technology

[0002] Currently, the measurement of liquid level inside containers mainly employs direct and indirect methods. Direct measurement involves using a buoy-type device to measure directly inside the container. This method requires the buoy-type device to be waterproof and corrosion-resistant. Additionally, liquid residue may remain on the surface of the buoy-type device, affecting the accuracy of liquid level detection. Furthermore, the buoy-type device occupies container volume. Indirect measurement, on the other hand, typically involves placing capacitance testing electrodes on the outer wall of the container and determining the liquid level by measuring changes in capacitance.

[0003] Existing capacitance test electrodes are only distributed at a certain height of the container, thus they can only detect the liquid level at a specific height and cannot measure arbitrary liquid levels. At the same time, the frequency of the point electrodes is inconsistent when detecting different liquid levels. Existing technology only obtains data changes through test electrodes and cannot detect the liquid level height of different liquids. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a fragrance diffuser that can detect the liquid level of different liquids.

[0005] To solve the above-mentioned technical problems, the technical solution used in this invention is as follows:

[0006] This invention provides a diffuser device, including an atomizing device and a liquid storage bottle connected to the atomizing device. The liquid storage bottle is made of insulating material. The atomizing device is used to atomize the liquid in the liquid storage bottle and diffuse it outwards. The diffuser device also includes a liquid level detection electrode, a reference electrode, and a controller electrically connected to the liquid level detection electrode and the reference electrode. The liquid level detection electrode and the reference electrode are disposed on the outer wall of the liquid storage bottle or located outside the liquid storage bottle. The liquid level detection electrode extends along the liquid level height direction. At least one reference electrode is provided and is located near the bottom of the liquid storage bottle. The controller calculates the liquid level height in the liquid storage bottle based on the detection signals of the liquid level detection electrode and the reference electrode.

[0007] Preferably, multiple liquid level detection electrodes are provided, and in the direction of liquid level height, the liquid level detection electrodes are located above the reference electrode.

[0008] Preferably, two liquid level detection electrodes are provided, located on opposite sides of the liquid storage bottle, and two reference electrodes are also provided, also located on opposite sides of the liquid storage bottle.

[0009] Preferably, in the circumferential direction of the liquid storage bottle, every two liquid level detection electrodes correspond one-to-one with two reference electrodes and are aligned in position, and both the liquid level detection electrodes and the reference electrodes are rectangles extending along the liquid level height direction.

[0010] Preferably, the width of one liquid level detection electrode is a positive integer multiple of the width of the other liquid level detection electrode; the width of one reference electrode is a positive integer multiple of the width of the other reference electrode.

[0011] Preferably, in the liquid level height direction, the length of the liquid level detection electrode is a positive integer multiple of the length of the reference electrode; and / or

[0012] In the circumferential direction of the liquid storage bottle, the width of the reference electrode is a positive integer multiple of the width of the liquid level detection electrode.

[0013] Preferably, the aroma diffuser further includes a housing, the atomizing device is connected to the housing, the housing is provided with a receiving cavity, and the liquid storage bottle is located in the receiving cavity.

[0014] The liquid level detection electrode and the reference electrode are installed on the inner wall of the receiving cavity. The controller is located inside the housing and is spaced 0.1mm-20mm from the outer wall of the storage bottle, preferably 1mm-5mm. Alternatively, the storage bottle is detachable from the receiving cavity. The liquid level detection electrode and the reference electrode are installed on the outer wall of the storage bottle. The controller is located inside the housing. The outer wall of the storage bottle is also provided with contacts electrically connected to the liquid level detection electrode and the reference electrode. The inner wall of the receiving cavity is provided with contacts electrically connected to the controller. When the storage bottle is placed inside the receiving cavity, the contacts on the storage bottle contact the contacts on the inner wall of the receiving cavity.

[0015] Preferably, the aroma diffuser further includes a housing, the atomizing device is connected to the housing, a main control circuit board is disposed inside the housing, a receiving cavity is disposed on the housing, the liquid storage bottle is located in the receiving cavity, the aroma diffuser further includes a liquid level detection circuit board, the liquid level detection circuit board is installed on the outer wall of the liquid storage bottle, the liquid level detection electrode and the reference electrode are connected to the liquid level detection circuit board, and the liquid level detection electrode and the reference electrode are located on the inner side of the liquid level detection circuit board facing the liquid storage bottle, the controller is also installed on the liquid level detection circuit board, and the liquid level detection circuit board is electrically connected to the main control circuit board.

[0016] Preferably, the liquid level detection electrode and the reference electrode are formed on the inner side of the liquid level detection circuit board by etching, and a metal shielding layer is formed on the outer side of the liquid level detection circuit board facing away from the liquid storage bottle.

[0017] Preferably, when detecting the liquid level height, the frequency change of the current reference electrode Cex and the frequency change of the current liquid level detection electrode Cey are determined; the ratio of the current frequency changes is determined by Cc = Cey / Cex; the current liquid level height H is determined by Cc = H*K, where K is a coefficient; Cex = Ceb - Cea, where Ceb is the current frequency of the reference electrode and Cea is the no-load frequency of the reference electrode; Cey = Ced - Cec, where Ced is the current frequency of the liquid level detection electrode and Cec is the no-load frequency of the liquid level detection electrode.

[0018] The frequency change Cex of the reference electrode is the difference between the current frequency of the reference electrode and its no-load frequency; the frequency change Cey of the liquid level detection electrode is the difference between the current frequency of the liquid level detection electrode and its no-load frequency.

[0019] Compared with the prior art, the main advantages of the aroma diffuser described in this invention are: the liquid level is detected by a reference electrode and a liquid level detection electrode, and the liquid level detection electrode extends along the liquid level height direction, thereby enabling the measurement of any liquid level height in the storage bottle.

[0020] By setting up two liquid level detection electrodes and two reference electrodes, the accuracy of data acquisition is improved. The heights of the liquid level detection electrodes and the reference electrodes are positive integer multiples of each other, thus allowing for accurate determination of the liquid level height based on the proportional relationship between the liquid level detection electrodes and the reference electrodes.

[0021] Meanwhile, the level detection electrode and the reference electrode are distributed along the height of the storage bottle, making the electrodes on the storage bottle set up separately. This avoids the electrodes being too long and the electrode area being too large, which would lead to an excessively large capacitance difference and increased error. By setting up distributed electrodes, the area of ​​each electrode is reduced, thus reducing error.

[0022] Compared with the prior art, the advantages of the aroma diffuser device described in this invention are mainly reflected in the following aspects: the change in liquid level height is reflected by the frequency change of the liquid level detection electrode and the frequency change of the reference electrode; the liquid level height is determined by the frequency change, which is suitable for height detection of different liquid levels.

[0023] Preferably, the liquid level detection electrode and the reference electrode are spaced 0.1mm-20mm from the outer wall of the storage bottle.

[0024] Preferably, the aroma diffuser further includes a housing, the atomizing device is connected to the housing, the housing is provided with a receiving cavity, the liquid storage bottle is located in the receiving cavity, the liquid level detection electrode and the reference electrode are installed on the inner wall of the receiving cavity, and the liquid level detection electrode and the reference electrode are spaced 0.1mm-20mm from the outer wall of the liquid storage bottle.

[0025] Preferably, the aroma diffuser further includes an outer shell and an inner shell, the inner shell being installed inside the outer shell, the atomizing device being installed inside the outer shell or the inner shell, the inner shell having a receiving cavity, the liquid storage bottle being located inside the receiving cavity, and the liquid level detection electrode and the reference electrode being installed on the outer wall of the receiving cavity.

[0026] Preferably, two grooves extending along the height direction are formed on the outer wall of the receiving cavity, and the liquid level detection electrode and the reference electrode are installed in both grooves. The liquid level detection electrode and the reference electrode are both thin sheets and are attached to the grooves at intervals.

[0027] Preferably, a main control circuit board is disposed inside the outer casing, and the aroma diffuser further includes a liquid level detection circuit board. The liquid level detection circuit board is installed on the outer wall of the receiving cavity. The liquid level detection electrode and the reference electrode are electrically connected to the liquid level detection circuit board. The liquid level detection circuit board is electrically connected to the main control circuit board, and the controller is installed on the main control circuit board or the liquid level detection circuit board.

[0028] Preferably, the liquid level detection electrode and the reference electrode are arranged in at least one group, and each group of electrodes includes a reference electrode located at the bottom and 2-4 liquid level detection electrodes, and the reference electrode and the 2-4 liquid level detection electrodes are arranged in a straight line along the height direction.

[0029] Preferably,

[0030] When detecting the liquid level height, the current frequency change Cex of the reference electrode is collected, and the frequency change Cey' of the liquid level detection electrode at the current liquid level is collected. The liquid level height H is calculated as H = 1 / K * Cey' / Cex, where K is a preset coefficient; Cex = Ceb - Cea, where Ceb is the current frequency of the reference electrode and Cea is the no-load frequency of the reference electrode; Cey' = Ced - Cec, where Ced is the current frequency of the liquid level detection electrode at the current liquid level and Cec is the no-load frequency of the liquid level detection electrode at the current liquid level.

[0031] The level detection electrode to be determined is the level detection electrode for the current level if it meets the following conditions: the frequency change Cey' of the level detection electrode to be determined is greater than the preset value and it is the highest level detection electrode; or the frequency change Cey' of the level detection electrode to be determined is greater than the preset value and the frequency change Cey' of the higher level detection electrode is less than or equal to the preset value.

[0032] Preferably, the liquid level detection electrodes and reference electrodes are arranged in at least two groups. Each group of electrodes includes a reference electrode located at the bottom and 2-4 liquid level detection electrodes. The reference electrode and the 2-4 liquid level detection electrodes are arranged in a straight line along the height direction and are spaced apart. The liquid level detection electrodes and reference electrodes are arranged in at least two groups. The number of liquid level detection electrodes in each group of electrodes is the same and they are arranged at the same height in a one-to-one correspondence.

[0033] When detecting the liquid level height, the current frequency change Cex of the reference electrode and the frequency change Cey' of the liquid level detection electrode at the current liquid level are collected. If the liquid level detection electrode at the current liquid level is the highest liquid level detection electrode, a full bottle signal is issued; otherwise, the liquid level height H = 1 / K * Cey' / Cex is calculated, where K is a preset coefficient; Cex = Ceb - Cea, where Ceb is the current frequency of the reference electrode and Cea is the no-load frequency of the reference electrode; Cey' = Ced - Cec, where Ced is the current frequency of the liquid level detection electrode at the current liquid level and Cec is the no-load frequency of the liquid level detection electrode at the current liquid level.

[0034] The level detection electrode to be determined is the level detection electrode for the current level if it meets the following conditions: the frequency change Cey' of the level detection electrode to be determined is greater than the preset value and it is the highest level detection electrode; or the frequency change Cey' of the level detection electrode to be determined is greater than the preset value and the frequency change Cey' of the higher level detection electrode is less than or equal to the preset value.

[0035] Preferably, the aroma diffuser further includes an air pump and a siphon tube. The air pump is connected to the atomizing device via a pipeline, providing airflow to the atomizing device. The atomizing device is connected to the liquid storage bottle via the siphon tube, mixing and atomizing the liquid in the storage bottle with the airflow provided by the air pump; or

[0036] The aroma diffuser also includes an absorbent cotton core, and the atomizing device includes a vibrating atomizing plate. One end of the absorbent cotton core is inserted into the liquid storage bottle, and the other end abuts against the vibrating atomizing plate, so as to transfer the liquid in the liquid storage bottle to the vibrating atomizing plate. The vibration of the vibrating atomizing plate atomizes the liquid delivered to the vibrating atomizing plate.

[0037] Preferably, the liquid level detection electrode and the reference electrode are arranged in at least two groups. Each group of electrodes includes a reference electrode located at the bottom and 2-4 liquid level detection electrodes. The reference electrode and the 2-4 liquid level detection electrodes are arranged in a straight line along the height direction and are spaced apart. The number of liquid level detection electrodes in each group of electrodes is the same and they are set at the same height in a one-to-one correspondence. Multiple reference electrodes are set at the same height.

[0038] The Ceb is the average of the current frequencies of multiple reference electrodes, and the Ced is the average of the current frequencies of multiple liquid level detection electrodes at the current liquid level.

[0039] Compared with the prior art, the main advantages of the aroma diffuser described in this invention are: the liquid level is detected by a reference electrode and a liquid level detection electrode, and the liquid level detection electrode extends along the liquid level height direction, thereby enabling the measurement of any liquid level height in the storage bottle. Attached Figure Description

[0040] The above and other objects, features, and advantages of the invention will become clearer through a more detailed description of the preferred embodiments illustrated in the accompanying drawings. The same reference numerals denote the same parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual dimensions; the focus is on illustrating the gist of the invention.

[0041] Figure 1 This is a schematic diagram of one embodiment of the present invention.

[0042] Figure 2 This is a schematic diagram showing the alignment of the liquid level detection electrode and the reference electrode in this invention.

[0043] Figure 3 This is a schematic diagram showing the misalignment of the liquid level detection electrode and the reference electrode in this invention.

[0044] Figure 4 This is a schematic diagram of Embodiment 2 of the present invention.

[0045] Figure 5 This is a schematic diagram of Embodiment 3 of the present invention.

[0046] Figure 6 This is a schematic diagram of Embodiment 4 of the present invention.

[0047] Figure 7 This is a comparison chart of existing technologies that use only one set of test electrodes to detect liquid levels.

[0048] Figure 8 This is a comparison diagram of the liquid level detection using a reference electrode and a liquid level detection electrode in this invention.

[0049] Figure 9 This is a schematic diagram of Embodiment 5 of the present invention.

[0050] Figure 10 This is a cross-sectional schematic diagram of the installation relationship between the liquid storage bottle and the shell in Embodiment 5 of the present invention.

[0051] Figure 11 This is a schematic diagram of the shell structure in Embodiment 5 of the present invention.

[0052] Figure 12This is a schematic diagram of Embodiment Six of the present invention.

[0053] Figure 13 This is a schematic diagram of Embodiment Seven of the present invention.

[0054] Figure 14 This is a schematic diagram of one of the structures in Embodiment Nine of the present invention.

[0055] Figure description: 1. Liquid storage bottle, 11. Liquid suction tube, 12. Liquid absorption cotton core, 2. Liquid level detection electrode, 2a. First liquid level detection electrode, 2b. Second liquid level detection electrode, 2c. Third liquid level detection electrode, 3. Reference electrode, 4. Controller, 5. Atomizing device, 51. Vibrating atomizing plate, 6. Housing, 61. Receiving cavity, 62. Main control circuit board, 63. Groove, 601. Outer housing, 602. Inner housing, 7. Contact point, 8. Liquid level detection circuit board, 9. Air pump. Detailed Implementation

[0056] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention. In this embodiment, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0057] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to and integrated with the other element, or there may be an intervening element present. The terms "mounted," "one end," "the other end," and similar expressions used in this invention are for illustrative purposes only.

[0058] Example 1

[0059] A diffuser device, such as Figure 1-2As shown, the device includes an atomizing device (not shown) and a storage bottle 1 connected to the atomizing device. The storage bottle 1 is made of insulating material. The atomizing device is used to atomize the liquid in the storage bottle 1 and diffuse it to the outside. The diffuser also includes a liquid level detection electrode 2, a reference electrode 3, and a controller (not shown) electrically connected to the liquid level detection electrode 2 and the reference electrode 3. The liquid level detection electrode 2 and the reference electrode 3 are disposed on the outer wall of the storage bottle 1. The liquid level detection electrode 2 extends along the liquid level height direction. At least one reference electrode 3 is provided and is adjacent to the bottom of the storage bottle 1. The controller 4 calculates the liquid level height in the storage bottle based on the detection signals of the liquid level detection electrode 2 and the reference electrode 3.

[0060] The liquid level is detected by reference electrode 3 and liquid level detection electrode 2. Liquid level detection electrode 2 extends along the liquid level height direction, so that any liquid level height of the storage bottle 1 can be measured.

[0061] Both the reference electrode 3 and the liquid level detection electrode 2 are non-contact capacitive sensors, and are attached to the outer wall of the storage bottle 1. When the liquid level changes, the frequency of the electrodes changes. In a preferred embodiment, a groove is recessed inward from the outer wall of the storage bottle 1; the reference electrode 3 and the liquid level detection electrode 2 are attached to the groove.

[0062] In a preferred embodiment, one end of the reference electrode 3 is flush with the bottom of the storage bottle 1, and one end of the liquid level detection electrode 2 is flush with the top of the storage bottle 1; this enables accurate detection of the liquid level from the bottom to the top of the storage bottle 1.

[0063] The liquid level detection electrode 2 and the reference electrode 3 are distributed along the height direction of the liquid storage bottle 1, so that the electrodes on the liquid storage bottle 1 are set in a split manner. This can avoid the electrodes being too long and the electrode area being too large, which would lead to increased error. By setting the distributed electrodes, the area of ​​each electrode is reduced, thus reducing the error.

[0064] When detecting the liquid level height, the current liquid level height is determined by the frequency change of the liquid level detection electrode 2 and the frequency change of the reference electrode 3; the current frequency change ratio Cc is determined by the ratio of the frequency change Cey of the liquid level detection electrode 2 to the frequency change Cex of the reference electrode 3; and the corresponding liquid level height is determined by the current frequency change ratio Cc, where Cc = Cey / Cex.

[0065] Multiple liquid level detection electrodes 2 are provided, and in the direction of liquid level height, the liquid level detection electrodes 2 are located above the reference electrodes 3. In one preferred embodiment, two reference electrodes 3 are provided; the number of liquid level detection electrodes 2 is a positive integer multiple of the number of reference electrodes 3; the two reference electrodes 3 and every two liquid level detection electrodes 2 are distributed along the direction of liquid level height, and the reference electrodes 3 and liquid level detection electrodes 2 are located on opposite sides of the storage bottle.

[0066] In one preferred embodiment, the number of liquid level detection electrodes 2 is twice the number of reference electrodes 3. There are two reference electrodes 3, located on opposite sides of the liquid storage bottle 1. There are also two liquid level detection electrodes 2, also located on opposite sides of the liquid storage bottle 1.

[0067] In one preferred embodiment, two liquid level detection electrodes 2 are provided, located on opposite sides of the liquid storage bottle 1, and two reference electrodes 3 are also provided, also located on opposite sides of the liquid storage bottle 1. By providing two liquid level detection electrodes 2 and two reference electrodes 3, the accuracy of data acquisition is improved. The heights of the liquid level detection electrodes 2 and the reference electrodes 3 are positive integer multiples of each other, thus enabling accurate determination of the liquid level height based on the proportional relationship between the liquid level detection electrodes 2 and the reference electrodes 3.

[0068] In the circumferential direction of the liquid storage bottle 1, the two liquid level detection electrodes 2 correspond one-to-one with the two reference electrodes 3 and are aligned in position. The two liquid level detection electrodes 2 and the two reference electrodes 3 are all rectangles extending along the liquid level height direction.

[0069] Reference Figure 3 As shown, in another embodiment, in the circumferential direction of the liquid storage bottle 1, the two liquid level detection electrodes 2 are respectively misaligned with the two reference electrodes 3.

[0070] In the direction of liquid level height, the length of the liquid level detection electrode 2 is a positive integer multiple of the length of the reference electrode 3; in a preferred embodiment, the length of the liquid level detection electrode 2 is twice the length of the reference electrode 3.

[0071] In the circumferential direction of the liquid storage bottle, the width of the reference electrode 3 is a positive integer multiple of the width of the liquid level detection electrode 2; in a preferred embodiment, the width of the liquid level detection electrode 2 is 1 times the width of the reference electrode 3.

[0072] The width of one liquid level detection electrode 2 is a positive integer multiple of the width of the other liquid level detection electrode 2; the width of one reference electrode 3 is a positive integer multiple of the width of the other reference electrode 3. In a preferred embodiment, the width of one liquid level detection electrode 2 is 1 times the width of the other liquid level detection electrode 2, and the widths of the two liquid level detection electrodes 2 are equal; the width of one reference electrode 3 is 1 times the width of the other reference electrode 3, and the widths of the two reference electrodes 3 are equal.

[0073] The method for detecting liquid level includes the following steps:

[0074] S1, pre-installed reference electrode 3 and liquid level detection electrode 2.

[0075] S2. The linear relationship between the preset frequency change ratio and the liquid level height is Cc = H * K; Cc is the frequency change ratio; H is the liquid level height; K is the coefficient; in this embodiment, the coefficient K is a preset value.

[0076] S3. Collect the frequency change Cex of the current reference electrode 3.

[0077] S4. Collect the frequency change Cey of the current liquid level detection electrode 2.

[0078] S5. Determine the ratio of the current frequency change Cc using Cc = Cey / Cex, and then determine the corresponding liquid level height using the ratio of the current frequency change Cc.

[0079] The above method works as follows: when the liquid level in the storage bottle 1 changes, the frequency change of the reference electrode 3 and the frequency change of the liquid level detection electrode 2 also change, and consequently, the frequency change ratio between the reference electrode 3 and the liquid level detection electrode 2 also changes. The frequency change ratio is the largest when the storage bottle 1 is full, and gradually decreases as the liquid level decreases. The frequency change ratio reflects the change in liquid level. Furthermore, since the electrodes detect different liquids at different frequencies, the liquid level is determined by the frequency change. This method is suitable for detecting different liquid levels.

[0080] In the above method, S3 involves acquiring the frequency change Cex of the current reference electrode 3, specifically including the following steps:

[0081] S3.1. Preset the no-load frequency Cea of ​​the reference electrode. The no-load frequency Cea of ​​the reference electrode is the frequency corresponding to the liquid storage bottle 1 when it is unloaded.

[0082] S3.2 Obtain the current frequency Ceb of the reference electrode. Specifically, obtain the frequencies of the two reference electrodes respectively, then calculate the average frequency of the two reference electrodes, and set the average frequency of the reference electrodes as the current frequency Ceb of the reference electrodes.

[0083] In this embodiment, the frequency Ce1 of one reference electrode is first obtained; then the frequency Ce2 ​​of another reference electrode is obtained; the average frequency of the two reference electrodes is calculated by (Ce1+Ce2) / 2; then the average frequency of the two reference electrodes is set as the current frequency Ceb of the reference electrode; the frequency obtained in this way has good accuracy.

[0084] S3.3 Determine the frequency change Cex of the current reference electrode 3 by subtracting the no-load frequency Cea of ​​the reference electrode from the current frequency Ceb of the reference electrode; Ceb-Cea=Cex.

[0085] In the above method, the frequency change Cey of the current liquid level detection electrode 2 is collected in S4, specifically including the following steps:

[0086] S4.1. Preset the no-load frequency Cec of the liquid level detection electrode 2. The no-load frequency Cec of the liquid level detection electrode 2 is the frequency corresponding to the liquid storage bottle 1 when it is unloaded.

[0087] S4.2 Obtain the current frequency Ced of the liquid level detection electrode 2. Specifically, obtain the frequencies of the two liquid level detection electrodes 2 respectively, then calculate the average frequency of the two liquid level detection electrodes 2, and set the average frequency of the liquid level detection electrodes 2 as the current frequency Ced of the liquid level detection electrode 2.

[0088] In this embodiment, the frequency Ce3 of one liquid level detection electrode 2 is first obtained; then the frequency Ce4 of the other liquid level detection electrode 2 is obtained; the average frequency of the two liquid level detection electrodes 2 is calculated by (Ce3+Ce4) / 2; then the average frequency of the two liquid level detection electrodes 2 is set as the current frequency Ced of the liquid level detection electrode 2; the frequency obtained in this way has good accuracy.

[0089] S4.3. Determine the current frequency change Cey of the liquid level detection electrode 2 by subtracting the no-load frequency Cec of the liquid level detection electrode 2 from the current frequency Ced of the liquid level detection electrode 2; Ced-Cec=Cey.

[0090] The following data will be used to illustrate this.

[0091] Table 1 shows the data on the liquid level height corresponding to the frequency change ratio of liquid M1.

[0092]

[0093]

[0094] Table 1

[0095] Taking Table 1 as an example, as the liquid level decreases, the ratio of frequency changes will gradually decrease.

[0096] Table 2 shows the data on the liquid level height corresponding to the frequency change ratio of liquid M2.

[0097]

[0098] Table 2

[0099] Taking Table 2 as an example, as the liquid level decreases, the ratio of frequency changes will gradually decrease.

[0100] Table 3 shows the data on the liquid level height corresponding to the frequency change ratio of liquid M3.

[0101]

[0102] Table 3

[0103] Taking Table 3 as an example, as the liquid level decreases, the ratio of frequency changes will gradually decrease.

[0104] Refer to Tables 1, 2, and 3. Figure 7 and Figure 8 As shown, the frequency change ratios of the liquid level detection electrodes 2 are inconsistent for different types of liquids; this invention determines the liquid level height by the frequency change ratio, and is applicable to the detection of different liquid levels.

[0105] Example 2

[0106] A diffuser device, such as Figure 4 As shown, the device includes a housing 6, an atomizing device 5, and a liquid storage bottle 1 connected to the atomizing device 5. The atomizing device 5 is connected to the housing 6, and the housing 6 is provided with a receiving cavity 61, in which the liquid storage bottle 1 is fixedly disposed. The controller 4 is disposed inside the housing 6 and is spaced 0.1mm-20mm from the outer wall of the liquid storage bottle 1, preferably 1mm-5mm apart. The liquid level detection electrode 2 and the reference electrode 3 are disposed on the inner wall of the receiving cavity 61 of the housing 6. In this embodiment, the liquid level detection electrode 2 and the reference electrode 3 are connected to the controller 4 through leads to realize signal transmission. The remaining structure is the same as in Embodiment 1.

[0107] Example 3

[0108] A diffuser device, such as Figure 5As shown, the device includes a housing 6, an atomizing device 5, and a storage bottle 1 connected to the atomizing device 5. The atomizing device 5 is connected to the housing 6, and the housing 6 has a receiving cavity 61. The storage bottle 1 is located inside the receiving cavity 61. The storage bottle 1 is detachably disposed in the receiving cavity 61. The controller 4 is disposed inside the housing 6. The reference electrode 3 and the liquid level detection electrode are disposed on the outer wall of the storage bottle 1. The outer wall of the storage bottle 1 is also provided with contacts 7 that are electrically connected to the liquid level detection electrode 2 and the reference electrode 3. The inner wall of the receiving cavity 61 is provided with contacts 7 that are electrically connected to the controller 4. When the storage bottle 1 is placed in the receiving cavity 61, the contacts 7 on the storage bottle 1 contact with the contacts 7 on the inner wall of the receiving cavity 61. Through the contact between the contacts 7 on the storage bottle 1 and the contacts 7 on the inner wall of the receiving cavity 61, the liquid level detection electrode 2, the reference electrode 3, and the controller 4 are connected by signal. The remaining structure is the same as in Embodiment 1.

[0109] Example 4

[0110] A diffuser device, such as Figure 6 As shown, it includes a housing 6, an atomizing device 5, and a liquid storage bottle 1 connected to the atomizing device 5. The atomizing device 5 is connected to the housing 6. The housing 6 is provided with a receiving cavity 61. The liquid storage bottle 1 is located in the receiving cavity 61 and is detachably disposed in the receiving cavity 61.

[0111] The housing 6 contains a main control circuit board 62 and a receiving cavity 61. The liquid storage bottle 1 is located in the receiving cavity 61. The aroma diffuser also includes a liquid level detection circuit board 8, which is mounted on the outer wall of the liquid storage bottle 1. The liquid level detection electrode 2 and the reference electrode 3 are connected to the liquid level detection circuit board 8 and are located on the inner side of the liquid level detection circuit board 8 facing the liquid storage bottle 1. The controller is also mounted on the liquid level detection circuit board 8, which is electrically connected to the main control circuit board 62.

[0112] The liquid level detection electrode 2 and the reference electrode 3 are formed on the inner side of the liquid level detection circuit board 8 by etching. A metal shielding layer is formed on the outer side of the liquid level detection circuit board 8 facing away from the liquid storage bottle 1; the rest of the structure is the same as in Embodiment 1.

[0113] Example 5

[0114] A diffuser device, such as Figure 9-11As shown, the aroma diffuser also includes a housing 6, with an atomizing device 5 connected to the housing 6. A receiving cavity 61 is provided on the housing 6, and a liquid storage bottle is located within the receiving cavity 61. A liquid level detection electrode 2 and a reference electrode 3 are installed on the inner wall of the receiving cavity 61, with a spacing of 0.1mm-20mm between the liquid level detection electrode 2, the reference electrode 3, and the outer wall of the liquid storage bottle. Two grooves 63 extending along the height direction are formed on the outer wall of the receiving cavity 61. A liquid level detection electrode 2 and a reference electrode 3 are installed in each of the two grooves 63. Both the liquid level detection electrode 2 and the reference electrode 3 are thin sheets, attached to the grooves 63 at intervals. The liquid level detection electrodes 2 and the reference electrodes 3 are arranged in at least two groups. Each group of electrodes includes a reference electrode 3 located at the bottom and 2-4 liquid level detection electrodes 2. The reference electrode 3 and the 2-4 liquid level detection electrodes 2 are arranged in a straight line along the height direction and are spaced apart. The number of liquid level detection electrodes 2 in each group of electrodes is the same and they are arranged at equal heights (or as shown in the figure). Figure 12-13 (To understand). In this embodiment, an outer shell can also be provided outside the housing 6 to enclose the liquid level detection electrode 2.

[0115] Example 6

[0116] A diffuser device, such as Figure 12 As shown, the device includes an absorbent cotton core 12 and an atomizing device including a vibrating atomizing plate 51. One end of the absorbent cotton core 12 is inserted into the liquid storage bottle 1, and the other end abuts against the vibrating atomizing plate 51, transferring the liquid in the liquid storage bottle 1 to the vibrating atomizing plate 51. The vibration of the vibrating atomizing plate 51 atomizes the liquid delivered to it. The atomizing device in this embodiment uses ultrasonic atomization. The settings of the liquid level detection electrode 2 and the reference electrode 3 can be the same as in any other embodiment.

[0117] Example 7

[0118] A diffuser includes an air pump 9 and a siphon tube 11. The air pump 9 is connected to an atomizing device 5 via a pipeline, providing airflow to the atomizing device 5. The atomizing device 5 is connected to a liquid storage bottle 1 via the siphon tube 11, mixing and atomizing the liquid in the liquid storage bottle 1 with the airflow provided by the air pump 9. The diffuser includes an outer shell 601 and an inner shell 602. The inner shell 602 is installed inside the outer shell 601. The atomizing device is installed inside either the outer shell 601 or the inner shell 602. A receiving cavity 61 is provided inside the inner shell 602. The liquid storage bottle 1 is located inside the receiving cavity 61. A liquid level detection electrode 2 and a reference electrode 3 are installed on the outer wall of the receiving cavity 61. The liquid level detection electrodes 2 and the reference electrodes 3 are arranged in at least two groups. Each group of electrodes includes a reference electrode 3 located at the bottom and 2-4 liquid level detection electrodes 2. The reference electrode 3 and the 2-4 liquid level detection electrodes 2 are arranged in a straight line along the height direction and are spaced apart. The number of liquid level detection electrodes 2 in each group of electrodes is the same and they are arranged at the same height in a one-to-one correspondence.

[0119] In this embodiment, two grooves 63 extending along the height direction are formed on the outer wall of the receiving cavity. A liquid level detection electrode 2 and a reference electrode 3 are installed in each of the two grooves 63. Both the liquid level detection electrode 2 and the reference electrode 3 are thin sheets, spaced apart and attached to the grooves 63 (reference). Figure 10-12 (To understand).

[0120] Example 8

[0121] The method for detecting the liquid level height of the diffuser in Examples 5 to 7: In the diffuser in Examples 5 to 7, the liquid level detection electrode and the reference electrode are arranged in at least one group. Each group of electrodes includes a reference electrode located at the bottom and 2-4 liquid level detection electrodes. The reference electrode and the 2-4 liquid level detection electrodes are arranged in a straight line along the height direction and are spaced apart to avoid mutual interference between the electrodes.

[0122] The method for detecting liquid level includes the following steps:

[0123] S1. Preset linear relationship data between the frequency change ratio and the liquid level height: Cc = H * K; Cc is the frequency change ratio; H is the liquid level height; K is the coefficient; in this embodiment, the coefficient K is a preset value.

[0124] S2. Collect the current frequency change Cex of the reference electrode 3, and collect the frequency change Cey' of the current liquid level detection electrode. Determine the ratio Cc of the current frequency changes using Cc = Cey' / Cex, and determine the corresponding liquid level height H using the ratio Cc. The liquid level height H is then calculated using the formula H = 1 / K * Cey' / Cex. In one embodiment, if the current liquid level detection electrode is the highest liquid level detection electrode, a full bottle signal is issued, and the liquid level height H does not need to be calculated.

[0125] An electrode for detecting the current liquid level that meets the following conditions is a liquid level detection electrode for detecting the current liquid level:

[0126] (1) When the frequency change Cey' of the undetermined liquid level detection electrode is greater than the preset value and is the highest liquid level detection electrode, the liquid level detection electrode is regarded as the liquid level detection electrode of the current liquid level.

[0127] For reference Figure 10 The preset value is set to 0. The liquid level detection electrodes 2 include a first liquid level detection electrode 2a and a second liquid level detection electrode 2b. The second liquid level detection electrode 2b is relatively closer to the bottle opening, so the second liquid level detection electrode 2b is the highest liquid level detection electrode. When the frequency change of the second liquid level detection electrode 2b is >0, the bottle is full, and the second liquid level detection electrode 2b is the liquid level detection electrode for the current liquid level.

[0128] (2) When the frequency change Cey' of the undetermined liquid level detection electrode is greater than the preset value, and the frequency change Cey' of the higher-level liquid level detection electrode is less than or equal to the preset value, the liquid level detection electrode 2 is regarded as the liquid level detection electrode of the current liquid level.

[0129] refer to Figure 12 When the preset value is set to 0, a first liquid level detection electrode 2a, a second liquid level detection electrode 2b, and a third liquid level detection electrode 2c are sequentially arranged from the bottom of the bottle to the top. When the frequency change of the third liquid level detection electrode 2c is ≤0, it indicates that the bottle is not full. When the frequency change of the second liquid level detection electrode 2b is >0, the second liquid level detection electrode 2b is the liquid level detection electrode for the current liquid level.

[0130] You can also refer to Figure 10 When the frequency change of the second liquid level detection electrode 2b is ≤0 and the frequency change of the first liquid level detection electrode 2a is >0, the first liquid level detection electrode 2a is the liquid level detection electrode for the current liquid level.

[0131] The frequency change Cey of the current liquid level detection electrode satisfies the following condition: Cey' = Ced - Cec, where Ced is the current frequency of the current liquid level detection electrode and Cec is the no-load frequency of the current liquid level detection electrode.

[0132] For example when Figure 10 When the first liquid level detection electrode 2a is the liquid level detection electrode for the current liquid level, the frequency of the first liquid level detection electrode 2a is Ced.

[0133] If the liquid level detection electrodes and reference electrodes are arranged in at least two groups, there are at least two liquid level detection electrodes for the current liquid level, and Ced is the average of the current frequencies of multiple liquid level detection electrodes for the current liquid level. For example, when the first liquid level detection electrode 2a is the liquid level detection electrode for the current liquid level, the average of the current frequencies of multiple first liquid level detection electrodes 2a is taken as Ced.

[0134] The frequency change Cex of the current reference electrode 3 satisfies the following condition: Cex = Ceb - Cea, where Ceb is the current frequency of the reference electrode and Cea is the no-load frequency of the reference electrode.

[0135] If the level detection electrode and the reference electrode are arranged in at least two groups, and there are at least two reference electrodes, Ceb takes the average of the current frequencies of multiple reference electrodes.

[0136] In embodiments where the liquid level detection electrodes and reference electrodes are arranged in at least two groups, each group has the same number of liquid level detection electrodes, which are arranged at the same height in a one-to-one correspondence, and multiple reference electrodes are arranged at the same height. For example... Figure 12Understanding: the left group has two liquid level detection electrodes, and the right group also has two liquid level detection electrodes. The two first liquid level detection electrodes 2a on the left and right are at the same height, and the two reference electrodes 3 on the left and right are at the same height. In this embodiment, left and right refer to... Figure 12 Let's take a look.

[0137] Example 9

[0138] A diffuser device, such as Figure 9-14 As shown, in this embodiment, the number of liquid level detection electrodes is twice the number of reference electrodes 3. Two reference electrodes 3 are provided, located on opposite sides of the storage bottle 1; four liquid level detection electrodes are provided, also located on opposite sides of the storage bottle 1. The two reference electrodes and each pair of liquid level detection electrodes 3 are distributed along the liquid level height direction. The structure of this embodiment can be referred to... Figure 9-14 Any structure.

[0139] The liquid level detection electrodes are a first liquid level detection electrode 2a and a second liquid level detection electrode 2b; one end of each of the two reference electrodes 3 is flush with the bottom of the storage bottle 1, and the other end of each of the two second liquid level detection electrodes 2b is flush with the top of the liquid when the storage bottle 1 is full; the two first liquid level detection electrodes 2a are located between the reference electrodes and the second liquid level detection electrodes 2b. The rest of the structure is the same as in Embodiment 1.

[0140] In this embodiment, when detecting the liquid level height, the current liquid level height is determined by the frequency change of the first liquid level detection electrode 2a or the second liquid level detection electrode 2b and the frequency change of the reference electrode 3.

[0141] In this embodiment, at least two methods for detecting liquid level are included. The first method for detecting liquid level includes the following steps:

[0142] S1, pre-installed reference electrode 3, first liquid level detection electrode 2a, and second liquid level detection electrode 2b.

[0143] S2. The linear relationship between the preset frequency change ratio and the liquid level height is Cc = H * K; Cc is the frequency change ratio; H is the liquid level height; K is the coefficient; in this embodiment, the coefficient K is a preset value.

[0144] S3. Collect the frequency change Cex of the current reference electrode 3.

[0145] S4. Collect the frequency change Cey' of the second liquid level detection electrode 2b; if the frequency change of the second liquid level detection electrode 2b is >0, then determine that the current liquid level has reached the full height of the bottle; if the frequency change of the second liquid level detection electrode 2b is ≤0, then proceed to S5.

[0146] S5. Collect the frequency change Cey of the first liquid level detection electrode 2a.

[0147] S6. Determine the ratio Cc of the current frequency change using Cc = Cey" / Cex, and then determine the corresponding liquid level height using the ratio Cc of the current frequency change.

[0148] The first method for detecting liquid level height uses the second liquid level detection electrode 2b to determine whether the liquid level height has reached the full bottle height; and determines the liquid level height below the full bottle height by the ratio between the frequency change of the first liquid level detection electrode 2a and the frequency change of the reference electrode 3.

[0149] In the above method, S3 involves acquiring the frequency change Cex of the current reference electrode 3, specifically including the following steps:

[0150] 1. Preset the no-load frequency Cea of ​​the reference electrode. The no-load frequency Cea of ​​the reference electrode is the frequency corresponding to the liquid storage bottle 1 when it is unloaded.

[0151] 2. Obtain the current frequency Ceb of the reference electrode. Specifically, obtain the frequencies of the two reference electrodes separately, then calculate the average frequency of the two reference electrodes, and set the average frequency of the reference electrodes as the current frequency Ceb of the reference electrodes.

[0152] In this embodiment, the frequency Ce1 of one reference electrode is first obtained; then the frequency Ce2 ​​of another reference electrode is obtained; the average frequency of the two reference electrodes is calculated by (Ce1+Ce2) / 2; then the average frequency of the two reference electrodes is set as the current frequency Ceb of the reference electrode; the frequency obtained in this way has good accuracy.

[0153] 3. Determine the frequency change Cex of the current reference electrode 3 by subtracting the no-load frequency Cea of ​​the reference electrode from the current frequency Ceb of the reference electrode; Ceb-Cea=Cex.

[0154] In the above method, the frequency change Cey' of the second liquid level detection electrode 2b is collected in S4; specifically, the following steps are included:

[0155] 1. The no-load frequency Cec' of the second liquid level detection electrode 2b is preset; the no-load frequency Cec' of the second liquid level detection electrode 2b is the frequency corresponding to the liquid storage bottle 1 when it is unloaded.

[0156] 2. Obtain the current frequency Ced' of the second liquid level detection electrode 2b. Specifically, obtain the frequencies of the two second liquid level detection electrodes 2b respectively, then calculate the average frequency of the two second liquid level detection electrodes 2b, and set the average frequency of the second liquid level detection electrodes 2b as the current frequency Ced' of the second liquid level detection electrode 2b.

[0157] In this embodiment, the frequency Ce3' of one second liquid level detection electrode 2b is first obtained; then the frequency Ce4' of another second liquid level detection electrode 2b is obtained; the average frequency of the two second liquid level detection electrodes 2b is calculated by (Ce3'+Ce4') / 2; then the average frequency of the two second liquid level detection electrodes 2b is set as the current frequency Ced' of the second liquid level detection electrode 2b; the frequency obtained in this way has good accuracy.

[0158] 3. Determine the current frequency change Cey' of the second liquid level detection electrode 2b by subtracting its idle frequency Cec' from the current frequency Ced' of the second liquid level detection electrode 2b; Ced'-Cec'=Cey'.

[0159] 4. If the frequency change of the second liquid level detection electrode 2b is greater than 0, it indicates that the current liquid level is greater than the lower end height of the second liquid level detection electrode 2b, thus determining that the current liquid level has reached the full bottle height. If the frequency change of the second liquid level detection electrode 2b is less than or equal to 0, it indicates that the current liquid level is less than or equal to the lower end height of the second liquid level detection electrode 2b, thus determining that the current liquid level has not reached the full bottle height.

[0160] In the above method, the frequency change Cey” of the first liquid level detection electrode 2a is collected in S5; specifically, it includes the following steps:

[0161] 1. The no-load frequency Cec” of the first liquid level detection electrode 2a is preset; the no-load frequency Cec” of the first liquid level detection electrode 2a is the frequency corresponding to the liquid storage bottle 1 when it is unloaded.

[0162] 2. Obtain the current frequency Ced of the first liquid level detection electrode 2a. Specifically, obtain the frequencies of the two first liquid level detection electrodes 2a respectively, then calculate the average frequency of the two first liquid level detection electrodes 2a, and set the average frequency of the first liquid level detection electrode 2a as the current frequency Ced of the first liquid level detection electrode 2a.

[0163] In this embodiment, the frequency Ce3” of a first liquid level detection electrode 2a is first obtained; then the frequency Ce4” of another first liquid level detection electrode 2a is obtained; the average frequency of the two first liquid level detection electrodes 2a is calculated by (Ce3”+Ce4”) / 2; then the average frequency of the two first liquid level detection electrodes 2a is set as the current frequency Ced” of the first liquid level detection electrode 2a; the frequency obtained in this way has good accuracy.

[0164] 3. Determine the current frequency change Cey” of the first liquid level detection electrode 2a by subtracting the no-load frequency Cec” of the first liquid level detection electrode 2a from the current frequency Ced” of the first liquid level detection electrode 2a; Ced”-Cec”=Cey”.

[0165] The second method for detecting liquid level includes the following steps:

[0166] S1, pre-installed reference electrode 3, first liquid level detection electrode 2a, and second liquid level detection electrode 2b.

[0167] S2. The linear relationship between the preset frequency change ratio and the liquid level height is Cc = H * K; Cc is the frequency change ratio; H is the liquid level height; K is the coefficient; in this embodiment, the coefficient K is a preset value.

[0168] S3. Collect the frequency change Cex of the current reference electrode 3.

[0169] S4. Collect the frequency change Cey' of the second liquid level detection electrode 2b and the frequency change Cey of the first liquid level detection electrode 2a.

[0170] S5. Determine the frequency change of the liquid level detection electrode at different heights.

[0171] If the frequency change of the liquid level detection electrode with the lowest height position is >0, and the frequency change of the other liquid level detection electrodes is ≤0, then the ratio of the current frequency change Cc is calculated using the liquid level detection electrode with the lowest height position and the reference electrode 3; that is, if the frequency change of the first liquid level detection electrode 2a is >0, and the frequency change of the second liquid level detection electrode 2b is ≤0, then proceed to S6.

[0172] If the frequency change of the liquid level detection electrodes at different heights is >0, then the ratio of the current frequency change Cc is calculated using the liquid level detection electrode with a frequency change >0 and the highest height position and the reference electrode 3; that is, if the frequency change of the first liquid level detection electrode 2a and the second liquid level detection electrode 2b is both >0, then the frequency change of the second liquid level detection electrode 2b is used for calculation, and then S7 is performed.

[0173] S6. Determine the ratio of the current frequency change Cc by using Cc = Cey" / Cex, and determine the corresponding liquid level height by using the ratio of the current frequency change Cc.

[0174] S7. Determine the ratio of the current frequency change Cc using Cc = Cey' / Cex, and then determine the corresponding liquid level height using the ratio of the current frequency change Cc.

[0175] In the above method, in S5, if the frequency change of the liquid level detection electrode with the lowest height position is >0 and the frequency change of the other liquid level detection electrodes is ≤0, it means that the current liquid level corresponds to the height of the liquid level detection electrode with the lowest height position. The ratio of the current frequency change Cc is calculated using the liquid level detection electrode with the lowest height position and the reference electrode 3.

[0176] In S5, if the frequency change of liquid level detection electrodes at different heights is >0, it means that the liquid level has submerged multiple liquid level detection electrodes. The frequency change ratio Cc is calculated using the liquid level detection electrode with the highest height among the multiple liquid level detection electrodes with frequency change >0.

[0177] The second method for detecting liquid level height involves comparing the liquid level using multiple level detection electrodes at different heights, thus ensuring a more accurate determination of the liquid level height.

[0178] In this specification, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0179] In the description of this specification, the references to terms such as "preferred embodiment," "another embodiment," "other embodiment," or "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0180] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A diffuser comprising an atomizing device and a liquid storage bottle connected to the atomizing device, the liquid storage bottle being made of an insulating material, the atomizing device being used to atomize the liquid in the liquid storage bottle and diffuse it outwards, characterized in that, The aroma diffuser also includes a liquid level detection electrode, a reference electrode, and a controller electrically connected to the liquid level detection electrode and the reference electrode. The liquid level detection electrode and the reference electrode are disposed on the outer wall of the liquid storage bottle or located outside the liquid storage bottle and spaced apart from the outer wall of the liquid storage bottle. The liquid level detection electrode extends along the liquid level height direction. At least one reference electrode is disposed and is located near the bottom of the liquid storage bottle. The liquid level detection electrode and the reference electrode are distributed along the height direction of the liquid storage bottle. The controller calculates any liquid level height in the liquid storage bottle based on the detection signals of the liquid level detection electrode and the reference electrode. When detecting the liquid level height, the current frequency change ratio Cc is determined by the ratio of the frequency change of the liquid level detection electrode Cey to the frequency change of the reference electrode Cex. The corresponding liquid level height is determined by the current frequency change ratio Cc, where Cc = Cey / Cex.

2. The aroma diffuser according to claim 1, characterized in that: Multiple liquid level detection electrodes are provided, and in the direction of liquid level height, the liquid level detection electrodes are located above the reference electrode.

3. The aroma diffuser according to claim 2, characterized in that: Two liquid level detection electrodes are provided, located on opposite sides of the liquid storage bottle. Two reference electrodes are also provided, also located on opposite sides of the liquid storage bottle.

4. The aroma diffuser according to claim 3, characterized in that: In the circumferential direction of the storage bottle, the two liquid level detection electrodes correspond one-to-one with the two reference electrodes and are aligned in position. Both the two liquid level detection electrodes and the two reference electrodes are rectangles extending along the liquid level height direction.

5. The aroma diffuser according to claim 3, characterized in that: The width of one liquid level detection electrode is a positive integer multiple of the width of another liquid level detection electrode; the width of one reference electrode is a positive integer multiple of the width of another reference electrode.

6. The aroma diffuser according to claim 1, characterized in that: In the direction of liquid level height, the length of the liquid level detection electrode is a positive integer multiple of the length of the reference electrode; and / or In the circumferential direction of the liquid storage bottle, the width of the reference electrode is a positive integer multiple of the width of the liquid level detection electrode.

7. The aroma diffuser according to any one of claims 1 to 6, characterized in that: The aroma diffuser also includes a housing, the atomizing device is connected to the housing, the housing is provided with a receiving cavity, and the liquid storage bottle is located in the receiving cavity; The liquid level detection electrode and the reference electrode are installed on the inner wall of the receiving cavity. The controller is located inside the housing and is spaced 0.1mm-20mm from the outer wall of the storage bottle. Alternatively, the storage bottle is detachable from the receiving cavity. The liquid level detection electrode and the reference electrode are installed on the outer wall of the storage bottle. The controller is located inside the housing. The outer wall of the storage bottle is also provided with contacts that are electrically connected to the liquid level detection electrode and the reference electrode. The inner wall of the receiving cavity is provided with contacts that are electrically connected to the controller. When the storage bottle is placed inside the receiving cavity, the contacts on the storage bottle contact the contacts on the inner wall of the receiving cavity.

8. The aroma diffuser according to any one of claims 1 to 6, characterized in that: The aroma diffuser also includes a housing, the atomizing device is connected to the housing, a main control circuit board is disposed inside the housing, a receiving cavity is disposed on the housing, the liquid storage bottle is located in the receiving cavity, the aroma diffuser also includes a liquid level detection circuit board, the liquid level detection circuit board is mounted on the outer wall of the liquid storage bottle, the liquid level detection electrode and the reference electrode are connected to the liquid level detection circuit board, and the liquid level detection electrode and the reference electrode are located on the inner side of the liquid level detection circuit board facing the liquid storage bottle, the controller is also mounted on the liquid level detection circuit board, and the liquid level detection circuit board is electrically connected to the main control circuit board.

9. The aroma diffuser according to claim 8, characterized in that: The liquid level detection electrode and the reference electrode are formed on the inner side of the liquid level detection circuit board by etching, and a metal shielding layer is formed on the outer side of the liquid level detection circuit board facing away from the liquid storage bottle.

10. The aroma diffuser according to claim 1, characterized in that: When detecting liquid level height, determine the frequency change of the current reference electrode (Cex) and the frequency change of the current liquid level detection electrode (Cey); determine the ratio of the current frequency changes (Cc) using Cc=Cey / Cex; determine the current liquid level height (H) using Cc=H*K, where K is a coefficient; Cex=Ceb-Cea, where Ceb is the current frequency of the reference electrode and Cea is the no-load frequency of the reference electrode; Cey=Ced-Cec, where Ced is the current frequency of the liquid level detection electrode and Cec is the no-load frequency of the liquid level detection electrode.

11. The aroma diffuser according to any one of claims 1 to 6 and 10, characterized in that: The liquid level detection electrode and the reference electrode are spaced 0.1mm-20mm apart from the outer wall of the storage bottle.

12. The aroma diffuser according to any one of claims 1 to 6 and 10, characterized in that: The aroma diffuser also includes a housing, the atomizing device is connected to the housing, the housing is provided with a receiving cavity, the liquid storage bottle is located in the receiving cavity, the liquid level detection electrode and the reference electrode are installed on the inner wall of the receiving cavity, and the liquid level detection electrode and the reference electrode are spaced 0.1mm-20mm from the outer wall of the liquid storage bottle.

13. The aroma diffuser according to any one of claims 1 to 6, characterized in that: The aroma diffuser also includes an outer shell and an inner shell. The inner shell is installed inside the outer shell. The atomizing device is installed inside the outer shell or the inner shell. The inner shell has a receiving cavity. The liquid storage bottle is located inside the receiving cavity. The liquid level detection electrode and the reference electrode are installed on the outer wall of the receiving cavity.

14. The aroma diffuser according to claim 13, characterized in that: Two grooves extending along the height direction are formed on the outer wall of the receiving cavity. The liquid level detection electrode and the reference electrode are installed in both grooves. The liquid level detection electrode and the reference electrode are both thin sheets and are attached to the grooves at intervals.

15. The aroma diffuser according to claim 13, characterized in that: The housing contains a main control circuit board, and the aroma diffuser also includes a liquid level detection circuit board. The liquid level detection circuit board is installed on the outer wall of the receiving cavity. The liquid level detection electrode and the reference electrode are electrically connected to the liquid level detection circuit board. The liquid level detection circuit board is electrically connected to the main control circuit board, and the controller is installed on the main control circuit board or the liquid level detection circuit board.

16. The aroma diffuser according to claim 2, characterized in that: The liquid level detection electrode and the reference electrode are arranged in at least one group. Each group of electrodes includes a reference electrode located at the bottom and 2-4 liquid level detection electrodes. The reference electrode and the 2-4 liquid level detection electrodes are arranged in a straight line along the height direction.

17. The aroma diffuser according to claim 16, characterized in that: When detecting liquid level, the current frequency change Cex of the reference electrode is collected, and the frequency change Cey of the liquid level detection electrode at the current liquid level is collected. ， Calculate the liquid level height H = 1 / K * Cey ， / Cex, where K is a preset coefficient; Cex = Ceb - Cea, Ceb is the current frequency of the reference electrode, Cea is the no-load frequency of the reference electrode, and Cey is the no-load frequency of the reference electrode. ， =Ced-Cec, where Ced is the current frequency of the liquid level detection electrode and Cec is the no-load frequency of the liquid level detection electrode. An electrode for detecting the current liquid level that meets the following condition is a level detection electrode for the current liquid level: the frequency change of the electrode for detecting the current liquid level, Cey. ， The liquid level detection electrode is higher than the preset value and is the highest; or the frequency change Cey of the undetermined liquid level detection electrode. ， The frequency change of the liquid level detection electrode that is greater than the preset value and is at a higher position (Cey) ， Less than or equal to the preset value.

18. The aroma diffuser according to claim 16, characterized in that: The liquid level detection electrodes and reference electrodes are arranged in at least two groups. Each group of electrodes includes a reference electrode located at the bottom and 2-4 liquid level detection electrodes. The reference electrode and the 2-4 liquid level detection electrodes are arranged in a straight line along the height direction and are spaced apart. The number of liquid level detection electrodes in each group of electrodes is the same and they are arranged at the same height in a one-to-one correspondence. When detecting liquid level, the current frequency change Cex of the reference electrode is collected, and the frequency change Cey of the liquid level detection electrode at the current liquid level is collected. ， If the current liquid level detection electrode is the highest level detection electrode, a full bottle signal is issued; otherwise, the liquid level height H = 1 / K * Cey is calculated. ， / Cex, where K is a preset coefficient; Cex = Ceb - Cea, where Ceb is the current frequency of the reference electrode, Cea is the no-load frequency of the reference electrode, and Cey is the no-load frequency of the reference electrode. ， =Ced-Cec, where Ced is the current frequency of the liquid level detection electrode and Cec is the no-load frequency of the liquid level detection electrode. An electrode for detecting the current liquid level that meets the following condition is a level detection electrode for the current liquid level: the frequency change of the electrode for detecting the current liquid level, Cey. ， The liquid level detection electrode is higher than the preset value and is the highest; or the frequency change Cey of the undetermined liquid level detection electrode. ， The frequency change of the liquid level detection electrode that is greater than the preset value and is at a higher position (Cey) ， Less than or equal to the preset value.

19. The aroma diffuser according to any one of claims 1 to 6, 16 to 18, characterized in that: The aroma diffuser also includes an air pump and a siphon tube. The air pump is connected to the atomizing device via a pipeline, providing airflow to the atomizing device. The atomizing device is connected to the liquid storage bottle via the siphon tube, mixing and atomizing the liquid in the storage bottle with the airflow provided by the air pump; or The aroma diffuser also includes an absorbent cotton core, and the atomizing device includes a vibrating atomizing plate. One end of the absorbent cotton core is inserted into the liquid storage bottle, and the other end abuts against the vibrating atomizing plate, so as to transfer the liquid in the liquid storage bottle to the vibrating atomizing plate. The vibration of the vibrating atomizing plate atomizes the liquid delivered to the vibrating atomizing plate.

20. The aroma diffuser according to claim 17, characterized in that: The liquid level detection electrodes and reference electrodes are arranged in at least two groups. Each group of electrodes includes a reference electrode located at the bottom and 2-4 liquid level detection electrodes. The reference electrodes and 2-4 liquid level detection electrodes are arranged in a straight line along the height direction and are spaced apart. The number of liquid level detection electrodes in each group of electrodes is the same and they are set at the same height in a one-to-one correspondence. Multiple reference electrodes are set at the same height. The Ceb is the average of the current frequencies of multiple reference electrodes, and the Ced is the average of the current frequencies of multiple liquid level detection electrodes at the current liquid level.

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