Fragrance diffusion equipment

Abstract

The invention provides fragrance diffusion equipment which comprises a liquid storage bottle, a liquid level detection electrode, a reference electrode and a controller electrically connected with the liquid level detection electrode and the reference electrode, and the liquid level detection electrode and the reference electrode are arranged on the outer wall of the liquid storage bottle or located on the outer side of the liquid storage bottle. The liquid level detection electrode extends in the liquid level height direction, the number of the reference electrode is at least one, the reference electrode is adjacent to the bottom of the liquid storage bottle, the controller calculates the liquid level height in the liquid storage bottle according to detection signals of the liquid level detection electrode and the reference electrode, and the liquid level detection device is suitable for detecting the liquid level heights of different liquids.

Description

Technical Field

[0001] The present invention relates to the field of liquid height detection, and particularly to a diffuser device. Background Art

[0002] Currently, for measuring the liquid height in a container, the existing technologies mainly adopt direct measurement method and indirect measurement method. The direct measurement method uses a buoy-type device to directly measure inside the container. This method has requirements for the waterproofness and anti-corrosion of the buoy-type device. At the same time, there will be liquid residue on the surface of the buoy-type device, which will affect the accuracy of liquid level detection. Meanwhile, the buoy-type device will occupy the volume of the container. The indirect measurement method generally sets capacitance test electrodes on the outer wall of the container and determines the liquid level height through capacitance changes.

[0003] The existing capacitance test electrodes are only distributed at some height positions of the container, and thus can only detect the liquid level at specific heights and cannot measure any liquid level height. At the same time, when detecting different liquid levels, the frequencies of the point electrodes are inconsistent. The existing technology can only detect the change of data obtained by the test electrodes and cannot detect the liquid level heights of different liquids. Summary of the Invention

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

[0005] To solve the above technical problems, the technical solution used in the present invention is:

[0006] The present 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 externally. The diffuser device further 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 arranged on the outer wall of the liquid storage bottle or are 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 adjacent to the bottom of the liquid storage bottle. The controller calculates the liquid level height in the liquid storage bottle according to the detection signals of the liquid level detection electrode and the reference electrode.

[0007] Preferably, a plurality of liquid level detection electrodes are provided, and in the liquid level height direction, 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 of the liquid level detection electrodes respectively correspond to and are aligned with two of the reference electrodes, and both the liquid level detection electrodes and the reference electrodes are rectangular and extend 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 another liquid level detection electrode; the width of one reference electrode is a positive integer multiple of the width of another 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 fragrance diffusing device 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 electrodes and the reference electrodes are installed on the inner wall of the receiving cavity, the controller is arranged in the housing and is spaced 0.1 mm - 20 mm from the outer wall of the liquid storage bottle, preferably spaced 1 mm - 5 mm; or the liquid storage bottle is detachable relative to the receiving cavity, the liquid level detection electrodes and the reference electrodes are installed on the outer wall of the liquid storage bottle, the controller is arranged in the housing, the outer wall of the liquid storage bottle is further provided with contacts electrically connected to the liquid level detection electrodes and the reference electrodes, and the inner wall of the receiving cavity is provided with contacts electrically connected to the controller. When the liquid storage bottle is placed into the receiving cavity, the contacts on the liquid storage bottle contact the contacts on the inner wall of the receiving cavity.

[0015] Preferably, the fragrance diffusing device further includes a housing, the atomizing device is connected to the housing, a main control circuit board is arranged in the housing, the housing is provided with a receiving cavity, the liquid storage bottle is located in the receiving cavity, the fragrance diffusing device 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 electrodes and the reference electrodes are connected to the liquid level detection circuit board, and the liquid level detection electrodes and the reference electrodes 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 electrodes and the reference electrodes are formed by etching on the inner side of the liquid level detection circuit board, 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, determine the frequency change amount Cex of the current reference electrode and the frequency change amount Cey of the current liquid level detection electrode; determine the current frequency change ratio Cc through Cc = Cey / Cex; determine the current liquid level height H through Cc = H*K, where K is a coefficient; Cex = Ceb - Cea, Ceb is the current frequency of the reference electrode, and Cea is the no-load frequency of the reference electrode; Cey = Ced - Cec, 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 amount Cex of the reference electrode is the difference between the current frequency of the reference electrode and the no-load frequency of the reference electrode; the frequency change amount Cey of the liquid level detection electrode is the difference between the current frequency of the liquid level detection electrode and the no-load frequency of the liquid level detection electrode.

[0019] The beneficial effects of the aroma diffusing device according to the present invention compared with the prior art are mainly reflected in: detecting the liquid level through the reference electrode and the liquid level detection electrode, and the liquid level detection electrode extends along the liquid level height direction, so that any liquid level height of the liquid storage bottle can be measured.

[0020] By setting two liquid level detection electrodes and two reference electrodes, the accuracy of data acquisition is improved. The height ratio of the liquid level detection electrode to the reference electrode is an integer multiple relationship, and thus the liquid level height can be accurately determined according to the proportional relationship between the liquid level detection electrode and the reference electrode.

[0021] At the same time, the liquid level detection electrode and the reference electrode are distributed along the height direction of the liquid storage bottle; the electrodes on the liquid storage bottle are arranged in a split manner; in this way, the excessive length of the electrodes can be avoided, and the error increase caused by the excessive capacitance difference value due to the excessive electrode area can be avoided; by setting distributed electrodes, the area of each electrode is reduced, and the error is reduced.

[0022] The beneficial effects of the aroma diffusing device according to the present invention compared with the prior art are mainly reflected in: reflecting the change of the liquid level height through the frequency change amount of the liquid level detection electrode and the frequency change amount of the reference electrode; determining the liquid level height through the frequency change amount, which is applicable to the height detection of different liquid levels.

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

[0024] Preferably, the aroma diffusing device 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 0.1 mm - 20 mm from the outer wall of the liquid storage bottle.

[0025] Preferably, the fragrance diffusing device further includes an outer housing and an inner housing. The inner housing is installed inside the outer housing. The atomizing device is installed inside the outer housing or the inner housing. A receiving cavity is provided inside the inner housing. 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.

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

[0027] Preferably, a main control circuit board is provided inside the outer housing. The fragrance diffusing device 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. 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. Each group of electrodes includes a reference electrode located at the bottommost and 2-4 liquid level detection electrodes. The reference electrode and the 2-4 liquid level detection electrodes are arranged in a straight line in the height direction.

[0029] Preferably,

[0030] When detecting the liquid level height, collect the current frequency change amount Cex of the reference electrode, collect the frequency change amount Cey' of the liquid level detection electrode of the current liquid level, and 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, Cey' = Ced - Cec, Ced is the current frequency of the liquid level detection electrode of the current liquid level, and Cec is the no-load frequency of the liquid level detection electrode of the current liquid level;

[0031] The pending liquid level detection electrode that meets the following conditions is the liquid level detection electrode of the current liquid level: the frequency change amount Cey' of the pending liquid level detection electrode is greater than the preset value and is the highest liquid level detection electrode; or the frequency change amount Cey' of the pending liquid level detection electrode is greater than the preset value, and the frequency change amount Cey' of the liquid level detection electrode at the next higher level is less than or equal to the preset value.

[0032] Preferably, the liquid level detection electrodes and the reference electrodes are arranged in at least two groups. Each group of electrodes includes a reference electrode located at the bottommost and 2 - 4 liquid level detection electrodes. The reference electrode and the 2 - 4 liquid level detection electrodes are arranged in a straight line and spaced apart along the height direction. The liquid level detection electrodes and the reference electrodes are arranged in at least two groups, and 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, collect the current frequency change amount Cex of the reference electrode, and collect the frequency change amount Cey’ of the liquid level detection electrode of the current liquid level. If the liquid level detection electrode of the current liquid level is the highest liquid level detection electrode, then send out a full bottle signal; otherwise, 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, Cey’ = Ced - Cec, Ced is the current frequency of the liquid level detection electrode of the current liquid level, and Cec is the no-load frequency of the liquid level detection electrode of the current liquid level;

[0034] The undetermined liquid level detection electrode that satisfies the following conditions is the liquid level detection electrode of the current liquid level: the frequency change amount Cey’ of the undetermined liquid level detection electrode is greater than the preset value and it is the highest liquid level detection electrode; or the frequency change amount Cey’ of the undetermined liquid level detection electrode is greater than the preset value, and the frequency change amount Cey’ of the liquid level detection electrode at the next higher level is less than or equal to the preset value.

[0035] Preferably, the aroma diffusing device further includes an air pump and a siphon tube. The air pump is connected to the atomizing device through a pipeline to provide air flow to the atomizing device. The atomizing device is connected to the liquid storage bottle through the siphon tube to mix and atomize the liquid in the liquid storage bottle with the air flow provided by the air pump; or

[0036] The aroma diffusing device further includes a liquid absorbing cotton core. The atomizing device includes a vibrating atomizing sheet. One end of the liquid absorbing cotton core is inserted into the liquid storage bottle, and the other end abuts against the vibrating atomizing sheet to transfer the liquid in the liquid storage bottle to the vibrating atomizing sheet. The vibrating atomizing sheet vibrates to atomize the liquid transported to the vibrating atomizing sheet.

[0037] Preferably, the liquid level detection electrodes and the reference electrodes are arranged in at least two groups. Each group of electrodes includes a reference electrode located at the bottommost and 2 - 4 liquid level detection electrodes. The reference electrode and the 2 - 4 liquid level detection electrodes are arranged in a straight line and spaced apart along the height direction. 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, and multiple reference electrodes are arranged at the same height;

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

[0039] The beneficial effects of the aroma diffusing device according to the present invention compared with the prior art are mainly reflected in that the liquid level is detected by the reference electrode and the liquid level detection electrode, and the liquid level detection electrode extends along the liquid level height direction, so that any liquid level height of the liquid storage bottle can be measured. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The present invention will become more apparent from the following preferred embodiments shown in the drawings. The above and other objects, features, and advantages of the present invention will become clearer. Identical reference numerals in all the drawings indicate the same parts, and the drawings are not deliberately drawn to actual size or in proportion, with the emphasis on showing the gist of the present invention.

[0041] Figure 1 Schematic diagram of Embodiment 1 of the present invention.

[0042] Figure 2 Schematic diagram of the liquid level detection electrode and the reference electrode being aligned in the present invention.

[0043] Figure 3 Schematic diagram of the liquid level detection electrode and the reference electrode being misaligned in the present invention.

[0044] Figure 4 Schematic diagram of Embodiment 2 of the present invention.

[0045] Figure 5 Schematic diagram of Embodiment 3 of the present invention.

[0046] Figure 6 Schematic diagram of Embodiment 4 of the present invention.

[0047] Figure 7 Comparison diagram of detecting the liquid level using only one set of test electrodes in the prior art.

[0048] Figure 8 Comparison diagram of detecting the liquid level using the reference electrode and the liquid level detection electrode in the present invention.

[0049] Figure 9 Schematic diagram of Embodiment 5 of the present invention.

[0050] Figure 10 Cross-sectional schematic diagram of the installation relationship between the liquid storage bottle and the housing in Embodiment 5 of the present invention.

[0051] Figure 11 Schematic diagram of the housing structure in Embodiment 5 of the present invention.

[0052] Figure 12Schematic diagram of Embodiment VI in the present invention.

[0053] Figure 13 Schematic diagram of Embodiment VII in the present invention.

[0054] Figure 14 One of the schematic structural diagrams of Embodiment IX in the present invention.

[0055] Description of the drawings: Liquid storage bottle 1, liquid suction tube 11, liquid suction cotton core 12, liquid level detection electrode 2, first liquid level detection electrode 2a, second liquid level detection electrode 2b, third liquid level detection electrode 2c, reference electrode 3, controller 4, atomization device 5, vibrating atomization sheet 51, housing 6, accommodation cavity 61, main control circuit board 62, groove 63, outer housing 601, inner housing 602, contact 7, liquid level detection circuit board 8, air pump 9. Detailed implementation manners

[0056] The technical solution of the present invention will be further described in detail below in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention. In this embodiment, it should be understood that the orientation or positional relationship indicated by terms such as "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0057] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to another element and integrated with it, or there may be an intermediate element at the same time. The terms "installation", "one end", "the other end" and similar expressions used in the present invention are only for the purpose of illustration.

[0058] Embodiment I

[0059] An aroma diffusing device, such as Figure 1-2As shown, it includes an atomizing device (not shown in the figure) and a liquid storage bottle 1 connected to the atomizing device. The liquid storage bottle 1 is made of insulating material. The atomizing device is used to atomize the liquid in the liquid storage bottle 1 and diffuse it outward. The diffuser further includes a liquid level detection electrode 2, a reference electrode 3, and a controller (not shown in the figure) 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 arranged on the outer wall of the liquid storage bottle 1. The liquid level detection electrode 2 extends along the liquid level height direction. The reference electrode 3 has at least one and is adjacent to the bottom of the liquid storage bottle 1. The controller 4 calculates the liquid level height in the liquid storage bottle according to the detection signals of the liquid level detection electrode 2 and the reference electrode 3.

[0060] The liquid level is detected by the reference electrode 3 and the liquid level detection electrode 2. The liquid level detection electrode 2 extends along the liquid level height direction, so that any liquid level height of the liquid 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 the reference electrode 3 and the liquid level detection electrode 2 are pasted on the outer wall of the liquid storage bottle 1 for use; when the liquid level changes, the frequency of the electrode changes. In a preferred embodiment, a groove is recessed inward from the outer wall of the liquid storage bottle 1; the reference electrode 3 and the liquid level detection electrode 2 are pasted in the groove.

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

[0063] The liquid level detection electrode 2 and the reference electrode 3 are distributed along the height direction of the liquid storage bottle 1; the electrodes on the liquid storage bottle 1 are arranged in a split manner; in this way, the length of the electrode can be avoided from being too large, and the error caused by too large electrode area can be avoided; by setting distributed electrodes, the area of each electrode is reduced, and the error is reduced.

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

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

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

[0067] In one preferred embodiment, two liquid level detection electrodes 2 are provided and located on opposite sides of the liquid storage bottle 1, and two reference electrodes 3 are also provided and 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 height of the liquid level detection electrode 2 and the reference electrode 3 is in a positive integer multiple relationship, and thus the liquid level height can be accurately determined according to the proportional relationship between the liquid level detection electrode 2 and the reference electrode 3.

[0068] In the circumferential direction of the liquid storage bottle 1, the two liquid level detection electrodes 2 respectively correspond to the two reference electrodes 3 one by one and are aligned in position, and the two liquid level detection electrodes 2 and the two reference electrodes 3 are both in the shape of a rectangle extending in the liquid level height direction.

[0069] Refer to Figure 3 As shown, in another embodiment, in the circumferential direction of the liquid storage bottle 1, the two liquid level detection electrodes 2 and the two reference electrodes 3 are arranged in a staggered manner.

[0070] In the liquid level height direction, the length of the liquid level detection electrode 2 is a positive integer multiple of the length of the reference electrode 3; in one preferred embodiment, the length of the liquid level detection electrode 2 is 2 times that 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 one preferred embodiment, the width of the liquid level detection electrode 2 is 1 times that of the reference electrode 3.

[0072] The width of one liquid level detection electrode 2 is an integer multiple of the width of the other liquid level detection electrode 2; the width of one reference electrode 3 is an 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] A method for detecting the liquid level height includes the following steps:

[0074] S1. Pre-install the reference electrode 3 and the liquid level detection electrode 2.

[0075] S2. Preset the 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 a coefficient; in this embodiment, the coefficient K is a preset value.

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

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

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

[0079] In the above method, when the liquid level in the liquid storage bottle 1 changes, the frequency change amount of the reference electrode 3 and the frequency change amount of the liquid level detection electrode 2 will also change, and then the frequency change ratio between the frequency change amount of the reference electrode 3 and the frequency change amount of the liquid level detection electrode 2 will also change; when the liquid storage bottle 1 is full, the frequency change ratio is the largest, and as the liquid level decreases, the frequency change ratio gradually decreases; the change of the liquid level height is reflected by the frequency change ratio; at the same time, since the frequencies of the electrodes for detecting different liquids are inconsistent; the liquid level height is determined by the frequency change amount; it is applicable to the height detection of different liquid levels.

[0080] In the above method, in S3, collecting the frequency change amount Cex of the current reference electrode 3 specifically includes the following steps:

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

[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 electrode as the current frequency Ceb of the reference electrode.

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

[0084] S3.3. Determine the frequency change amount 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, in S4, collecting the frequency change amount Cey of the current liquid level detection electrode 2 specifically includes 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 when the liquid storage bottle 1 is no-load.

[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 electrode 2 as the current frequency Ced of the liquid level detection electrode 2.

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

[0089] S4.3. Determine the frequency change amount Cey of the current 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] Illustrated by the following data

[0091] Table 1 is a data table of the frequency change ratio corresponding to the liquid level height of liquid M1.

[0092]

[0093]

[0094] Table 1

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

[0096] Table 2 is a data table showing the ratio of frequency change of liquid M2 corresponding to the liquid level height.

[0097]

[0098] Table 2

[0099] Taking Table 2 as an example; as the liquid level decreases, the ratio of the frequency change amount also gradually decreases.

[0100] Table 3 is a data table showing the ratio of frequency change of liquid M3 corresponding to the liquid level height.

[0101]

[0102] Table 3

[0103] Taking Table 3 as an example; as the liquid level decreases, the ratio of the frequency change amount also gradually decreases.

[0104] Referring to Table 1, Table 2, Table 3, Figure 7 and Figure 8 as shown; the ratios of the frequency change amounts of the liquid level detection electrodes 2 for different types of liquids are inconsistent; the present invention determines the liquid level height through the ratio of the frequency change amount and is applicable to the height detection of different liquid levels.

[0105] Embodiment 2

[0106] An aroma diffusing device, as Figure 4 shown, 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. An accommodation cavity 61 is provided on the housing 6, and the liquid storage bottle 1 is fixedly arranged in the accommodation cavity 61; the controller 4 is arranged in the housing 6 and is spaced 0.1 mm - 20 mm from the outer wall of the liquid storage bottle 1, preferably spaced 1 mm - 5 mm; the liquid level detection electrode 2 and the reference electrode 3 are arranged on the inner wall of the accommodation 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 structures are the same as those in Embodiment 1.

[0107] Embodiment 3

[0108] An aroma diffusing device, as Figure 5As 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, and the liquid storage bottle 1 is located within the receiving cavity 61; the liquid storage bottle 1 is detachably arranged in the receiving cavity 61; the controller 4 is arranged within the housing 6; a reference electrode 3 and a liquid level detection electrode are arranged on the outer wall of the liquid storage bottle 1; a contact 7 electrically connected to the liquid level detection electrode 2 and the reference electrode 3 is further arranged on the outer wall of the liquid storage bottle 1, and a contact 7 electrically connected to the controller 4 is arranged on the inner wall of the receiving cavity 61. When the liquid storage bottle 1 is placed into the receiving cavity 61, the contact 7 on the liquid storage bottle 1 contacts the contact 7 on the inner wall of the receiving cavity 61; through the contact 7 on the liquid storage bottle 1 contacting the contact 7 on the inner wall of the receiving cavity 61, signal connection between the liquid level detection electrode 2, the reference electrode 3, and the controller 4 is achieved; the remaining structure is the same as that of the first embodiment.

[0109] Embodiment Four

[0110] An aroma diffusing device, as Figure 6 shown, 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, and the liquid storage bottle 1 is located within the receiving cavity 61, and the liquid storage bottle 1 is detachably arranged in the receiving cavity 61.

[0111] A main control circuit board 62 is arranged within the housing 6. The housing 6 is provided with a receiving cavity 61, and the liquid storage bottle 1 is located within the receiving cavity 61. The aroma diffusing device further includes a liquid level detection circuit board 8, and the liquid level detection circuit board 8 is installed 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 the liquid level detection electrode 2 and the reference electrode 3 are located on the inner side of the liquid level detection circuit board 8 facing the liquid storage bottle 1. The controller is also installed on the liquid level detection circuit board 8, and the liquid level detection circuit board 8 is electrically connected to the main control circuit board 62.

[0112] The liquid level detection electrode 2 and the reference electrode 3 are formed by etching on the inner side of the liquid level detection circuit board 8, and 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 remaining structure is the same as that of the first embodiment.

[0113] Embodiment Five

[0114] An aroma diffusing device, as Figures 9-11As shown in the figure, the fragrance diffusing device further includes a housing 6. The atomizing device 5 is connected to the housing 6. A receiving cavity 61 is provided on the housing 6. The liquid storage bottle is located within the receiving cavity 61. The liquid level detection electrode 2 and the reference electrode 3 are installed on the inner wall of the receiving cavity 61. The liquid level detection electrode 2 and the reference electrode 3 are spaced 0.1 mm - 20 mm from the outer wall of the liquid storage bottle. Two grooves 63 extending in the height direction are formed on the outer wall of the receiving cavity 61. The liquid level detection electrode 2 and the reference electrode 3 are installed in both of the two grooves 63. The liquid level detection electrode 2 and the reference electrode 3 are both in the shape of thin sheets and are attached to the grooves 63 at intervals. The liquid level detection electrode 2 and the reference electrode 3 are arranged in at least two groups. Each group of electrodes includes a reference electrode 3 located at the bottommost 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 and are spaced apart in the height direction. 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 (it can also be understood with reference to Figures 12-13 ). In this embodiment, an outer housing can also be provided outside the housing 6 to wrap the liquid level detection electrode 2 in the outer housing.

[0115] Embodiment Six

[0116] A fragrance diffusing device, as Figure 12 shown, includes a liquid absorption cotton core 12. The atomizing device includes a vibrating atomizing sheet 51. One end of the liquid absorption cotton core 12 is inserted into the liquid storage bottle 1, and the other end abuts against the vibrating atomizing sheet 51 to transfer the liquid in the liquid storage bottle 1 to the vibrating atomizing sheet 51. The vibrating atomizing sheet 51 vibrates to atomize the liquid delivered to the vibrating atomizing sheet 51. The atomizing device in this embodiment adopts the ultrasonic atomizing method. The setting of the liquid level detection electrode 2 and the reference electrode 3 can be the same as that in any other embodiment.

[0117] Embodiment Seven

[0118] A fragrance diffusing device includes an air pump 9 and a siphon tube 11. The air pump 9 is connected to the atomizing device 5 through a pipeline to provide air flow to the atomizing device 5. The atomizing device 5 is connected to the liquid storage bottle 1 through the siphon tube 11 to mix and atomize the liquid in the liquid storage bottle 1 with the air flow provided by the air pump 9. The fragrance diffusing device includes an outer housing 601 and an inner housing 602. The inner housing 602 is installed inside the outer housing 601. The atomizing device is installed inside the outer housing 601 or the inner housing 602. A receiving cavity 61 is provided inside the inner housing 602. The liquid storage bottle 1 is located within the receiving cavity 61. The liquid level detection electrode 2 and the reference electrode 3 are installed on the outer wall of the receiving cavity 61. The liquid level detection electrode 2 and the reference electrode 3 are arranged in at least two groups. Each group of electrodes includes a reference electrode 3 located at the bottommost 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 and are spaced apart in the height direction. 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 in the height direction are formed on the outer wall of the accommodation cavity. Liquid level detection electrodes 2 and reference electrodes 3 are installed in both of the two grooves 63. The liquid level detection electrodes 2 and the reference electrodes 3 are both in the shape of thin sheets and are attached to the grooves 63 at intervals (for reference Figures 10-12 for understanding).

[0120] Embodiment VIII

[0121] A method for detecting the liquid level height of the perfume diffusing device in Embodiments V to VII. In the perfume diffusing devices in Embodiments V to VII, the liquid level detection electrodes and the reference electrodes are arranged in at least one group. Each group of electrodes includes a reference electrode located at the bottommost and 2 - 4 liquid level detection electrodes. The reference electrode and the 2 - 4 liquid level detection electrodes are arranged in a straight line and at intervals in the height direction to avoid mutual interference between the electrodes.

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

[0123] S1. Preset the 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 amount Cex of the reference electrode 3, collect the frequency change amount Cey' of the liquid level detection electrode of the current liquid level. Determine the current frequency change ratio Cc through Cc = Cey' / Cex, and determine the corresponding liquid level height H through the current frequency change ratio Cc. Calculate the liquid level height through the liquid level height H = 1 / K * Cey' / Cex. In one of the embodiments, if the liquid level detection electrode of the current liquid level is the highest liquid level detection electrode, a full - bottle signal is sent, and the liquid level height H does not need to be calculated.

[0125] The liquid level detection electrode to be determined that meets the following conditions is the liquid level detection electrode of the current liquid level:

[0126] (1) When the frequency change amount Cey' of the liquid level detection electrode to be determined is greater than the preset value and it is the highest liquid level detection electrode, this 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 respectively 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 mouth. Therefore, the second liquid level detection electrode 2b is the highest liquid level detection electrode. When the frequency change amount of the second liquid level detection electrode 2b > 0, it is a full - bottle state at this time, and the second liquid level detection electrode 2b is the liquid level detection electrode of the current liquid level.

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

[0129] Reference 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 mouth of the bottle. When the frequency change amount of the third liquid level detection electrode 2c ≤ 0, it indicates that it is not a full bottle state at this time. When the frequency change amount of the second liquid level detection electrode 2b > 0 at this time, the second liquid level detection electrode 2b is the liquid level detection electrode of the current liquid level.

[0130] It can also be referred to Figure 10 , when the frequency change amount of the second liquid level detection electrode 2b ≤ 0 and the frequency change amount of the first liquid level detection electrode 2a > 0, the first liquid level detection electrode 2a is the liquid level detection electrode of the current liquid level.

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

[0132] For example, when Figure 10 the first liquid level detection electrode 2a in is the liquid level detection electrode of the current liquid level, the detected 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 of the current liquid level, and Ced takes the average value of the current frequencies of multiple liquid level detection electrodes of the current liquid level. For example, when the first liquid level detection electrode 2a is the liquid level detection electrode of the current liquid level, the average value of the current frequencies of multiple first liquid level detection electrodes 2a is taken as Ced.

[0134] Among them, the frequency change amount 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 liquid level detection electrodes and reference electrodes are arranged in at least two groups, there are at least two reference electrodes, and Ceb takes the average value of the current frequencies of multiple reference electrodes.

[0136] In the embodiment where 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 is the same and they are arranged at equal heights in one-to-one correspondence, and multiple reference electrodes are arranged at equal heights. Such as Figure 12Understand that there are 2 liquid level detection electrodes in the left group, and there are also 2 liquid level detection electrodes in the right group. The heights of the left and right first liquid level detection electrodes 2a are the same, and the heights of the left and right reference electrodes 3 are the same. The left and right referred to in this embodiment refer to Figure 12 viewed from.

[0137] Embodiment IX

[0138] An aroma diffusing device, as Figures 9-14 shown. In this embodiment, the number of liquid level detection electrodes is twice the number of reference electrodes 3. There are two reference electrodes 3, which are located on opposite sides of the liquid storage bottle 1; there are four liquid level detection electrodes, which are also located on opposite sides of the liquid storage bottle 1. Every two of the two reference electrodes 3 and every two liquid level detection electrodes are distributed along the liquid level height direction. The structure of this embodiment can refer to Figures 9-14 any structure of.

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

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

[0141] In this embodiment, there are at least two liquid level height detection methods. The first liquid level height detection method includes the following steps:

[0142] S1. Pre-install the reference electrode 3, the first liquid level detection electrode 2a and the second liquid level detection electrode 2b.

[0143] S2. Preset the linear relationship data Cc = H*K between the frequency change amount ratio and the liquid level height; Cc is the frequency change amount 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 amount Cex of the current reference electrode 3.

[0145] S4. Collect the frequency change amount Cey' of the second liquid level detection electrode 2b; if the frequency change amount of the second liquid level detection electrode 2b > 0, it is determined that the current liquid level height reaches the full bottle height; if the frequency change amount of the second liquid level detection electrode 2b ≤ 0, then perform S5.

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

[0147] S6. Determine the current frequency change ratio Cc through Cc = Cey” / Cex, and determine the corresponding liquid level height through the current frequency change ratio Cc.

[0148] The first liquid level height detection method determines whether the liquid level height reaches the full bottle height through the second liquid level detection electrode 2b; and determines the liquid level height below the full bottle height through the ratio between the frequency change amount of the first liquid level detection electrode 2a and the frequency change amount of the reference electrode 3.

[0149] In the above method, collecting the frequency change amount Cex of the current reference electrode 3 in S3 specifically includes 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 empty.

[0151] 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 electrode as the current frequency Ceb of the reference electrode.

[0152] In this embodiment, first obtain the frequency Ce1 of a reference electrode; then obtain the frequency Ce2 of the other reference electrode; calculate the average frequency of the two reference electrodes through (Ce1 + Ce2) / 2; then set the average frequency of the two reference electrodes as the current frequency Ceb of the reference electrode; in this way, the obtained frequency has good accuracy.

[0153] 3. Determine the frequency change amount 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, collecting the frequency change amount Cey’ of the second liquid level detection electrode 2b in S4 specifically includes the following steps:

[0155] 1. Preset the no-load frequency Cec’ of the second liquid level detection electrode 2b; 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 empty.

[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 electrode 2b as the current frequency Ced’ of the second liquid level detection electrode 2b.

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

[0158] 3. Determine the frequency change amount Cey' of the current second liquid level detection electrode 2b by subtracting the no-load frequency Cec' of the second liquid level detection electrode 2b from the current frequency Ced' of the second liquid level detection electrode 2b; Ced' - Cec' = Cey'.

[0159] 4. If the frequency change amount of the second liquid level detection electrode 2b > 0, it means that the current liquid level height is greater than the lower end height of the second liquid level detection electrode 2b, so it is determined that the current liquid level height reaches the full bottle height. If the frequency change amount of the second liquid level detection electrode 2b ≤ 0, it means that the current liquid level height is less than or equal to the lower end height of the second liquid level detection electrode 2b, so it is determined that the current liquid level height does not reach the full bottle height.

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

[0161] 1. Preset the no-load frequency Cec'' of the first liquid level detection electrode 2a; the no-load frequency Cec'' of the first liquid level detection electrode 2a is the frequency corresponding to the empty storage bottle 1.

[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, first obtain the frequency Ce3'' of a first liquid level detection electrode 2a; then obtain the frequency Ce4'' of another first liquid level detection electrode 2a; calculate the average frequency of the two first liquid level detection electrodes 2a by (Ce3'' + Ce4'') / 2; then set the average frequency of the two first liquid level detection electrodes 2a as the current frequency Ced'' of the first liquid level detection electrode 2a; in this way, the obtained frequency has good accuracy.

[0164] 3. Determine the frequency change amount Cey'' of the current 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 the liquid level height includes the following steps:

[0166] S1. Pre-install the reference electrode 3, the first liquid level detection electrode 2a, and the second liquid level detection electrode 2b.

[0167] S2. Preset the 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 a coefficient; in this embodiment, the coefficient K is a preset value.

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

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

[0170] S5. Judge the frequency change amounts of the liquid level detection electrodes at different heights.

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

[0172] If the frequency change amounts of the liquid level detection electrodes at different heights are all > 0, then use the liquid level detection electrode with the highest height position and a frequency change amount > 0 and the reference electrode 3 to calculate the current frequency change ratio Cc; that is, if the frequency change amounts of both the first liquid level detection electrode 2a and the second liquid level detection electrode 2b > 0, then use the frequency change amount of the second liquid level detection electrode 2b for calculation, and then perform S7.

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

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

[0175] In the above method, in S5, if the frequency change amount of the liquid level detection electrode with the lowest height position > 0, and the frequency change amounts of the remaining liquid level detection electrodes ≤ 0, it means that the current liquid level corresponds to the height of the liquid level detection electrode with the lowest position, and use the liquid level detection electrode with the lowest height position and the reference electrode 3 to calculate the current frequency change ratio Cc.

[0176] In S5, if the frequency change amounts of the liquid level detection electrodes at different heights are respectively > 0, it indicates that the liquid level submerges multiple liquid level detection electrodes, and the liquid level detection electrode with the highest height position among the multiple liquid level detection electrodes with frequency change amounts > 0 is used to calculate the frequency change amount ratio Cc.

[0177] The second method for detecting the liquid level height detects the liquid level by comparing multiple liquid level detection electrodes at different heights, and the accuracy of determining the liquid level height is good.

[0178] In this specification, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0179] In the description of this specification, the description with reference to terms such as "preferred embodiment", "another embodiment", "other embodiments" or "specific examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

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

Claims

1. An aroma diffusing device, which comprises 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 externally, and is characterized in that, The aroma diffusing device further 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 are located outside the liquid storage bottle and are spaced apart from the outer wall of the liquid storage bottle. The liquid level detection electrode extends along the liquid level height direction, and at least one reference electrode is provided adjacent to the bottom of the liquid storage bottle. The controller calculates the liquid level height in the liquid storage bottle according to the detection signals of the liquid level detection electrode and the reference electrode.

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

3. The diffuser device according to claim 2, wherein: Two of the liquid level detection electrodes are provided and are located on opposite sides of the liquid storage bottle. Two of the reference electrodes are also provided and are also located on opposite sides of the liquid storage bottle.

4. The diffuser device according to claim 3, wherein: In the circumferential direction of the liquid storage bottle, the two liquid level detection electrodes respectively correspond to and are aligned with the two reference electrodes one by one. The two liquid level detection electrodes and the two reference electrodes are both in the shape of a rectangle extending along the liquid level height direction.

5. The fragrance diffusing device according to claim 3, wherein: 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.

6. The diffuser device according to claim 1, wherein: 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 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 diffuser device according to any one of claims 1 to 6, characterized in that: The aroma diffusing device further includes a housing. The atomizing device is connected to the housing. A receiving cavity is provided on the housing, 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 disposed in the housing and is spaced 0.1 mm - 20 mm from the outer wall of the liquid storage bottle, preferably spaced 1 mm - 5 mm; or the liquid storage bottle is detachable relative to the receiving cavity. The liquid level detection electrode and the reference electrode are installed on the outer wall of the liquid storage bottle. The controller is disposed in the housing. Contacts electrically connected to the liquid level detection electrode and the reference electrode are further provided on the outer wall of the liquid storage bottle. Contacts electrically connected to the controller are provided on the inner wall of the receiving cavity. When the liquid storage bottle is placed in the receiving cavity, the contacts on the liquid storage bottle contact the contacts on the inner wall of the receiving cavity.

8. The diffuser device according to any one of claims 1 to 6, characterized in that: The aroma diffusing device further includes a housing. The atomizing device is connected to the housing. A main control circuit board is provided in the housing. A receiving cavity is provided on the housing, and the liquid storage bottle is located in the receiving cavity. The aroma diffusing device further includes a liquid level detection circuit board 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. The liquid level detection circuit board is electrically connected to the main control circuit board.

9. The diffuser device according to claim 8, wherein: 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 diffuser device according to claim 1, wherein: When detecting the liquid level height, determine the frequency change amount Cex of the current reference electrode and the frequency change amount Cey of the current liquid level detection electrode; determine the current frequency change ratio Cc through Cc = Cey / Cex; determine the current liquid level height H through Cc = H*K, where K is a coefficient; Cex = Ceb - Cea, Ceb is the current frequency of the reference electrode, and Cea is the no-load frequency of the reference electrode; Cey = Ced - Cec, 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 diffuser device 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 0.1 mm - 20 mm from the outer wall of the liquid storage bottle.

12. The diffuser device according to any one of claims 1 to 6 and 10, characterized in that: The aroma diffusing device further includes a housing, the atomizing device is connected to the housing, a receiving cavity is provided on the housing, 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 0.1 mm - 20 mm from the outer wall of the liquid storage bottle.

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

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

15. The diffuser device according to claim 13, characterized in that: A main control circuit board is provided inside the outer housing. The aroma diffusing device 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. The controller is installed on the main control circuit board or the liquid level detection circuit board.

16. The diffuser device according to claim 2, wherein: 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 bottommost 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 diffusing device according to claim 16, wherein: When detecting the liquid level height, collect the current frequency change amount Cex of the reference electrode, and collect the frequency change amount Cey of the liquid level detection electrode of the current liquid level ， , 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, Cey ， = Ced - Cec, Ced is the current frequency of the liquid level detection electrode of the current liquid level, Cec is the no-load frequency of the liquid level detection electrode of the current liquid level; The undetermined liquid level detection electrode that satisfies the following conditions is the liquid level detection electrode for the current liquid level: the frequency change amount Cey of the undetermined liquid level detection electrode ， is greater than the preset value and is the highest liquid level detection electrode; or the frequency change amount Cey of the undetermined liquid level detection electrode ， is greater than the preset value, and the frequency change amount Cey of the liquid level detection electrode at the next higher level ， is less than or equal to the preset value.

18. The diffuser device according to claim 16, wherein: 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 bottommost 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 is the same and they are arranged at the same height in a one-to-one correspondence. When detecting the liquid level height, collect the current frequency change amount Cex of the reference electrode and the frequency change amount Cey of the liquid level detection electrode of the current liquid level. ， If the liquid level detection electrode of the current liquid level is the highest liquid level detection electrode, send a full bottle signal; otherwise, 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 ， = Ced - Cec, Ced is the current frequency of the liquid level detection electrode of the current liquid level, and Cec is the no-load frequency of the liquid level detection electrode of the current liquid level. The undetermined liquid level detection electrode that meets the following conditions is the liquid level detection electrode for the current liquid level: the frequency change amount Cey of the undetermined liquid level detection electrode ， is greater than the preset value and is the highest liquid level detection electrode; or the frequency change amount Cey of the undetermined liquid level detection electrode ， is greater than the preset value, and the frequency change amount Cey of the liquid level detection electrode at the next higher level ， is less than or equal to the preset value.

19. The diffuser device according to any one of claims 1 to 6, 16 to 18, characterized in that: The aroma diffusing device further includes an air pump and a siphon tube. The air pump is connected to the atomizing device through a pipeline to provide an air flow to the atomizing device. The atomizing device is connected to the liquid storage bottle through the siphon tube to mix and atomize the liquid in the liquid storage bottle with the air flow provided by the air pump; or The aroma diffusing device further includes a liquid absorbing cotton core. The atomizing device includes a vibrating atomizing sheet. One end of the liquid absorbing cotton core is inserted into the liquid storage bottle, and the other end abuts against the vibrating atomizing sheet to transfer the liquid in the liquid storage bottle to the vibrating atomizing sheet. The vibrating atomizing sheet vibrates to atomize the liquid transported to the vibrating atomizing sheet.

20. The diffuser device according to claim 17, wherein: The liquid level detection electrodes and the reference electrodes are arranged in at least two groups. Each group of electrodes includes a reference electrode located at the bottommost and 2 - 4 liquid level detection electrodes. The reference electrode and the 2 - 4 liquid level detection electrodes are arranged in a straight line and spaced apart in the height direction. The number of liquid level detection electrodes in each group of electrodes is the same and they are arranged at the same height in one-to-one correspondence. The multiple reference electrodes are arranged at the same height; Ceb takes the average value of the current frequencies of multiple reference electrodes, and Ced takes the average value of the current frequencies of the liquid level detection electrodes of multiple current liquid levels.

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