Humidifier

Abstract

The present invention provides a humidifier, which includes a liquid storage cavity, a base, a water level detector and a control unit. The liquid storage cavity is located on the base, the water level detector is arranged on the base, a contact portion is formed at the bottom of the liquid storage cavity, the probe of the water level detector abuts against the contact portion, a variable speed structure for changing the water flow speed is arranged around the probe and / or the contact portion, and the control unit is used to control the water level detector to detect the water level in the liquid storage cavity. The probe of the water level detector abuts against the contact portion on the liquid storage cavity for containing liquid, and a variable speed structure for changing the water flow speed is arranged between the probe and / or the contact portion. By changing the water flow speed, the air between the probe and the contact portion is extruded, so that the water level detector can well detect the change of the liquid level in the liquid storage cavity.

Description

Technical Field

[0001] The present invention relates to the technical field of smart home, and particularly to a humidifier. Background Art

[0002] With the advent of smart life, humidifiers have gradually entered thousands of households. Especially in dry areas, humidifiers are used to improve the indoor humidity, relieve dry skin, and enhance the quality of life.

[0003] In order to make the humidifier release an appropriate amount of water vapor and avoid excessive water vapor released to the outside, generally only air vents are left for the humidifier during use to release water vapor to the outside, while other parts of the humidifier are closed. However, since the humidifier is basically closed during use, it is difficult for users to observe the water volume of the humidifier through the air vents, and users will not observe the water volume from the air vents either. As a result, users cannot intuitively understand the change in the water volume inside the humidifier during use. Often, without the user's knowledge, the humidifier runs out of internal water, causing the humidifier to stop working. Especially at night when sleeping, if the humidifier fails to work properly due to water shortage, users will be exposed to a dry environment for a long time, which is likely to affect the skin humidity of users and their physical health.

[0004] To solve the above problems, the industry has proposed a technical solution of setting an ultrasonic sensor inside the humidifier to detect the change in the water volume of the humidifier. Specifically, it uses the technical principle that sound waves generate reflections when propagating in a medium and encountering media with different densities to detect the change in the water level of the water contained in the humidifier. Generally, the probe of the ultrasonic sensor is abutted against the inner wall of the inner cavity of the humidifier to detect the water level change. However, there is still an air medium between the probe and the abutted inner wall, which causes the ultrasonic signal to be reflected by the air medium during transmission, resulting in the ultrasonic sensor being unable to detect the water level change of the water contained in the humidifier and affecting the user experience. Summary of the Invention

[0005] The purpose of the present invention is to solve at least one of the above problems and provide a humidifier.

[0006] To meet the various purposes of the present invention, the present invention adopts the following technical solutions:

[0007] To meet one of the purposes of the present invention, there is provided a humidifier, including a liquid storage cavity, a base, a water level detector, and a control unit. The liquid storage cavity is located on the base, the water level detector is arranged on the base, a butting part is formed at the bottom of the liquid storage cavity, the probe of the water level detector abuts against the butting part, a variable speed structure for changing the water flow rate is arranged around the probe and / or the butting part, and the control unit is used to control the water level detector to detect the water level of the liquid storage cavity.

[0008] Further, the speed change structure includes a flow dividing protrusion formed on the bottom of the liquid storage cavity, the flow dividing protrusion protrudes towards the base, and the abutting portion is arranged on the flow dividing protrusion.

[0009] Further, the speed change structure includes a flow dividing groove arranged on the base, at least one notch is arranged on the groove wall of the flow dividing groove, and the probe is arranged in the flow dividing groove.

[0010] Further, the speed change structure includes a flow dividing protrusion and a flow dividing groove. The flow dividing protrusion is arranged on the bottom of the liquid storage cavity, and the abutting portion is arranged on the flow dividing protrusion. The flow dividing groove is arranged on the base, at least one notch is arranged on the groove wall of the flow dividing groove, and the probe is arranged in the flow dividing groove.

[0011] Further, a probe groove is arranged in the flow dividing groove, the probe is arranged in the probe groove, a flow dividing ring groove is formed between the probe groove and the flow dividing groove, the probe groove and the flow dividing groove are connected by a flow dividing piece, and at least two flow dividing pieces are arranged in the flow dividing ring groove to divide the flow dividing ring groove into at least two overflow grooves.

[0012] Further, the notch corresponds to one of the two overflow grooves.

[0013] Further, the probe includes a signal emitting surface, the signal emitting surface is in the same plane as the top surface of the flow dividing piece, or the signal emitting surface is farther from the bottom of the liquid storage cavity than the top surface of the flow dividing piece, and the abutting portion includes an abutting surface, and the abutting surface is in surface contact with the signal emitting surface.

[0014] Further, the height of the flow dividing piece is less than the depth of the flow dividing groove.

[0015] Further, a water level detection groove protruding and extending towards the base is arranged at the bottom of the liquid storage cavity, and the abutting portion is arranged at the bottom of the water level detection groove.

[0016] Specifically, the water level detector is an ultrasonic sensor.

[0017] Compared with the prior art, the present invention has multiple advantages, including but not limited to:

[0018] A variable speed structure for changing the water flow rate is provided around the probe and / or the abutting part of the humidifier of the present invention. The liquid entering the gap between the probe and the abutting part is divided into multiple liquid flows with different flow rates through the variable speed structure, so as to completely expel the air in the gap, so that when the probe emits a detection signal externally, the detection signal will not be reflected by the air in the gap, so that the water level detector can well detect the water level change of the liquid in the liquid storage cavity and prompt the user to add the corresponding liquid to the humidifier in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the following description of the embodiments in conjunction with the drawings, wherein:

[0020] Figure 1 is a schematic structural diagram of a humidifier according to a typical embodiment of the present invention.

[0021] Figure 2 is a schematic circuit principle diagram of a humidifier according to a typical embodiment of the present invention.

[0022] Figure 3 is a schematic structural diagram of the first perspective of the liquid storage cavity of a humidifier according to a typical embodiment of the present invention.

[0023] Figure 4 is a schematic structural diagram of the second perspective of the liquid storage cavity of a humidifier without a flow dividing protrusion 210 according to an embodiment of the present invention.

[0024] Figure 5 is a schematic structural diagram of the base of a humidifier without a flow dividing groove 220 and some components arranged on the base according to an embodiment of the present invention.

[0025] Figure 6 is a cross-sectional schematic diagram of a humidifier without a variable speed structure according to an embodiment of the present invention.

[0026] Figure 7 is a water flow distribution diagram of the gap between the abutting part and the probe of the humidifier without a variable speed structure provided by the present invention.

[0027] Figure 8 is a schematic structural diagram of the liquid storage cavity of a humidifier with a flow dividing protrusion according to an embodiment of the present invention.

[0028] Figure 9 is a cross-sectional schematic diagram of a humidifier according to the first embodiment of the present invention.

[0029] Figure 10 is Figure 9 an enlarged view of part A.

[0030] Figure 11Schematic diagram of the base with a diversion groove and some components arranged on the base of a humidifier according to an embodiment of the present invention.

[0031] Figure 12 Cross-sectional schematic diagram of a humidifier according to the second embodiment of the present invention.

[0032] Figure 13 For Figure 12 Enlarged view of part B.

[0033] Figure 14 Cross-sectional schematic diagram of a humidifier according to the third embodiment of the present invention.

[0034] Figure 15 For Figure 14 Enlarged view of part C.

[0035] Figure 16 Cross-sectional schematic diagram of a humidifier according to an embodiment of the present invention.

[0036] Figure 17 Schematic diagram of the water control component of a humidifier according to an embodiment of the present invention. Detailed implementation manners

[0037] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and cannot be construed as a limitation to the present invention.

[0038] Those skilled in the art of the present technology can understand that unless specifically stated otherwise, the singular forms "a", "an", "the" and "said" used herein may also include the plural forms. It should be further understood that the term "comprising" used in the specification of the present invention means the presence of the described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or their groups. It should be understood that when we say that an element is "connected" or "coupled" to another element, it can be directly connected or coupled to other elements, or there may also be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The phrase "and / or" used herein includes all or any unit and all combinations of one or more related listed items.

[0039] Those skilled in the art can understand that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by those of ordinary skill in the art to which this invention belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with their meaning in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless specifically defined as here.

[0040] The present invention provides a humidifier, in which a water level detector is provided. The probe of the water level detector abuts against an abutting portion on a liquid storage cavity for containing liquid, and a variable speed structure for changing the water flow speed is provided between the probe of the water level detector and / or the abutting portion. By changing the water flow speed, the air between the probe and the abutting portion is extruded, so that the water level detector can preferably detect the change of the liquid level in the liquid storage cavity.

[0041] In a typical embodiment of the present invention, combined with Figure 1 , the humidifier 100 includes a liquid storage cavity 110, a base 120, an atomizer 130, a water level detector 140, a display screen 150 and a control unit 160. Combined with Figure 2 , the control unit 160 is electrically connected to the atomizer 130, the water level detector 140 and the display screen 150.

[0042] The liquid storage cavity 110 is used for containing liquid. Combined with Figure 3 , an inner cavity 111 is provided in the liquid storage cavity 110, and the inner cavity 111 includes an opening 1111 provided at the top of the liquid storage cavity 110. The liquid storage cavity 110 is located on the base 120. Specifically, the bottom of the liquid storage cavity 110 is provided on the top of the base 120.

[0043] Combined with Figure 5 , an installation platform 121 is provided on the top of the base 120. Combined with Figure 4 , a matching platform 112 is provided at the bottom of the liquid storage cavity 110 corresponding to the installation platform 121. The installation platform 121 and the matching platform 112 face each other, and a plurality of positioning columns 122 are provided on the installation platform 121. The matching platform 112 is provided with positioning holes 113 corresponding to the positioning columns 122, and the positioning columns 122 are inserted into the positioning holes 113 to facilitate the positioning of the liquid storage cavity 110 and the base 120. The installation platform 121 and the matching platform 112 are threadedly connected to fixedly connect the liquid storage cavity 110 and the base 120 and maintain the structural stability of the humidifier 100.

[0044] A receiving structure is provided between the liquid storage cavity 110 and the base 120. The receiving structure includes an installation groove 123, a matching groove 114 and an abutting portion 115. Combined withFigure 5 , the installation groove 123 is arranged on the installation platform 121 of the base 120, and the installation groove 123 is recessed from the top of the base 120 towards the bottom of the base 120. In combination with Figure 4 , the mating groove 114 is recessed from the bottom of the liquid storage cavity 110 towards the top of the liquid storage cavity 110. The mating groove 114 is matched with the installation groove 123 to form an accommodation space for accommodating various electronic devices of the humidifier 100, and the spatial layout of the humidifier 100 is optimized by setting the accommodation space.

[0045] The abutting portion 115 is arranged on the outer side surface 1119 of the bottom wall 1118 of the liquid storage cavity 110, or the abutting portion 115 is a part of the outer side surface 1119 of the bottom wall 1118 of the liquid storage cavity 110, and the abutting portion 115 is arranged opposite to the installation groove 123.

[0046] In combination with Figure 6 , the water level detector 140 is used to detect the water level of the liquid in the inner cavity 111, and the water level detector 140 is arranged in the installation groove 123. The water level detector 140 includes a probe 141, and the probe 141 abuts against the abutting portion 115, so that the probe 141 can emit detection signals into the inner cavity 111 through the abutting portion 115 to detect the water level of the liquid in the inner cavity 111.

[0047] Specifically, in combination with Figure 4 and Figure 5 , the probe 141 includes a signal emitting surface 1411, the abutting portion 115 includes an abutting surface 1151, and the signal emitting surface 1411 is in surface contact with the abutting surface 1151, so that the probe 141 can emit signals outward well through the abutting portion 115.

[0048] The abutting portion 115 is a part of the bottom wall 1118 of the liquid storage cavity 110, and the bottom wall 1118 of the liquid storage cavity 110 is parallel to the horizontal plane of the liquid contained in the inner cavity 111. That is to say, the abutting surface 1151 of the abutting portion 115 is also parallel to the horizontal plane of the liquid contained in the inner cavity 111, so that the emission path of the detection signal emitted by the probe 141 of the water level detector 140 abutting against the abutting portion 115 is perpendicular to the horizontal plane of the liquid. The water level detector 140 can accurately detect the depth information between the horizontal plane of the liquid and the bottom 1112 of the inner cavity 111. The water level detector 140 outputs the depth signal obtained by detecting the liquid in the inner cavity 111 to the control unit 160. The control unit 160 analyzes and converts the depth signal into depth information, and converts the depth information into a control signal, and outputs the control signal to the display screen 150 to control the display screen 150 to display the corresponding depth information, so that the user can know the water level change of the liquid in the humidifier 100 in real time and add the corresponding liquid to the humidifier 100 in time.

[0049] In a typical embodiment of the present invention, the water level detector 140 is an ultrasonic sensor. Since the probe 141 of the water level detector 140 abuts against the abutting portion 115, the signal emitting surface 1411 of the probe 141 is in surface contact with the abutting surface 1151 of the abutting portion 115. The probe 141 emits an ultrasonic signal, and the ultrasonic signal is emitted toward the horizontal plane of the liquid in the inner cavity 111. Since the ultrasonic signal is reflected when it encounters different media during propagation in the medium, when the ultrasonic signal reaches the horizontal plane of the liquid, due to the different media on both sides of the horizontal plane of the liquid, the ultrasonic signal is reflected to generate an echo signal, and the probe 141 receives the echo signal.

[0050] The water level detector 140 sends the time data of emitting the ultrasonic signal and receiving the echo signal to the control unit 160. The control unit 160 can obtain the total length of the transmission path of the ultrasonic signal and the echo signal based on the product of the time interval between the ultrasonic signal and the echo signal and the emission speed of the acoustic signal. Dividing the total length of the transmission path of the ultrasonic signal and the echo signal by 2 can obtain the length of the transmission path of the ultrasonic signal or the length of the transmission path of the echo signal, that is, the distance between the horizontal plane of the liquid and the signal emitting surface 1411 of the probe 141.

[0051] Although the signal emission surface 1411 of the probe 141 is in surface contact with the contact surface 1151 of the contact portion 115, there is inevitably a small first gap 230 between the signal emission surface 1411 and the contact surface 1151. There is air in the first gap 230, that is to say, there is an air medium between the signal emission surface 1411 and the contact surface 1151. When the probe 141 emits an ultrasonic signal, the ultrasonic signal will be reflected by the air medium between the signal emission surface 1411 and the contact surface 1511, so that the water level detector 140 cannot detect the water level of the liquid contained in the liquid storage cavity 110.

[0052] To solve this problem, in the present invention, the liquid in the liquid storage cavity 110 is introduced into the installation groove 123, so that the liquid flows into the first gap 230 between the signal emission surface 1411 and the contact surface 1151, and the air in the first gap 230 is extruded. Since the liquid in the first gap 230 and the liquid in the liquid storage cavity 110 are the same substance, it will not affect the ultrasonic signal emitted by the probe 141, so that the water level detector 140 can well detect the water level change of the liquid in the liquid storage cavity 140.

[0053] However, in actual measurement, since the liquid surges into the first gap 230 from all around the first gap 230 at the same time and the flow rate of the liquid is also the same, the air in the central area of the first gap 230 cannot be extruded in time, so that there is still air remaining in the first gap 230, and further the ultrasonic signal emitted by the probe 141 is reflected by the air remaining in the first gap 230, affecting the water level detector 140 to detect the water level change in the liquid storage cavity 140. Refer to Figure 7 , Figure 7 The arrows in represent the water flow direction. There will be a collision of opposing water flows in the first gap 230, so that the air between the two opposing water flows cannot be discharged, and the air accumulates in the first gap 230.

[0054] To solve the problem that the air in the first gap 230 cannot be completely extruded by the liquid, a variable-speed structure is provided in the humidifier of the present invention. By changing the liquid flow rate between the probe 141 and / or the contact portion 115 through the variable-speed structure, the liquid around the first gap 230 has different flow rates, so that the liquid around the first gap 230 enters the first gap 230 successively, so that the air in the first gap 230 can be extruded from the liquid with a slower flow rate. That is to say, the liquid with a faster flow rate extrudes the air from the liquid with a lower flow rate, and further there is no air in the first gap 230. The variable-speed structure includes various implementation forms, and the specific implementation forms are as follows:

[0055] In the first embodiment, in combination with Figure 8, the speed change structure includes a flow dividing protrusion 210, the flow dividing protrusion 210 is disposed on the outer side surface 1119 of the bottom wall 1118 of the liquid storage cavity 110, and the flow dividing protrusion 210 protrudes from the outer side surface 1119 of the bottom wall 1118 of the liquid storage cavity 110. Specifically, the flow dividing protrusion 210 extends from the bottom wall 1118 of the liquid storage cavity 110 towards the base 120. The abutting portion 115 is disposed at one end of the flow dividing protrusion 210 away from the liquid storage cavity 110, and the signal emitting surface 1411 of the probe 141 abuts against the abutting surface 1151 of the abutting portion 115 disposed on the flow dividing protrusion 210.

[0056] Combined with Figure 9 and Figure 10 , the flow dividing protrusion 210 protrudes relative to the bottom wall 1118 of the liquid storage cavity 110, so that a retaining wall structure is formed between the flow dividing protrusion 210 and the bottom wall 1118 of the liquid storage cavity 110. When the liquid flows to the flow dividing protrusion 210, the liquid will be divided under the action of the flow dividing protrusion 210, so that the liquid is divided into multiple liquid flows with different flow rates, so that the flow rates of the multiple liquid flows entering the first gap 230 are different, so as to completely squeeze out the air in the first gap 230.

[0057] Furthermore, combined with Figure 5 , a probe slot 125 is further provided in the mounting slot 123, the probe 141 is disposed in the probe slot 125, the probe 141 is fixed by the probe slot 125, and the shape and size of the probe slot 125 are adapted to the probe 141. The top surface of the probe slot 125 (referred to as the first top surface 1251) is in the same plane as the signal emitting surface 1411 of the probe 141, or the first top surface 1251 is farther from the bottom wall 1118 of the liquid storage cavity 110 than the signal emitting surface 1411. Combined with Figure 10 , the first gap 230 is formed between the signal emitting surface 1411 and the abutting surface 1151, and the second gap 126 is formed between the first top surface 1251 of the probe slot 125 and the bottom wall 1118 of the liquid storage cavity 110. Since the distance between the first top surface 1251 and the bottom wall 1118 is greater than the distance between the signal emitting surface 1411 and the abutting surface 1151, the width of the second gap 126 is greater than the width of the first gap 230, and the second gap 126 is disposed outside the first gap 230.

[0058] When liquid flows into the installation groove 123, the liquid is divided into multiple liquid streams by the diversion protrusion 210. Since the width of the first gap 230 is smaller than the width of the second gap 126, the flow rate of the liquid entering the first gap 230 is further increased. The flow rate of the liquid in the first gap 230 is greater than the flow rate of the liquid in the second gap 126. The high-flow-rate liquid in the first gap 230 flows towards the second gap 126 with low-flow-rate liquid, so as to slowly extrude the air in the first gap 230 towards the second gap 126, making there no air in the first gap 230, so as to facilitate the water level detector 140 to detect the water level well.

[0059] The signal emitting surface 1411 of the probe 141 is in surface contact with the abutting surface 1151 of the abutting portion 115. Then, by subtracting the thickness of the diversion protrusion 210 and the bottom wall 1118 from the distance between the signal emitting surface 1411 and the liquid horizontal plane in the inner cavity 111, the water level depth of the liquid can be obtained. When the control unit 160 obtains the time interval between transmitting the ultrasonic signal and receiving the echo signal when transmitting the ultrasonic signal once from the water level detector 140, it can calculate the depth of the liquid in the inner cavity 111.

[0060] In the second embodiment, in combination with Figure 11 , the variable speed structure includes a diversion groove 220, the diversion groove 220 is arranged in the installation groove 123, and the water level detector 140 is arranged in the diversion groove 220. In combination with Figure 12 and Figure 13 , at least one notch 221 is provided in the diversion groove 220, so that the notch of the diversion groove 220 is uneven, so that the flow rates of the liquid streams flowing into the diversion groove 220 through the notch of the diversion groove 220 and the liquid streams flowing into the diversion groove 220 through the notch 221 of the diversion groove 220 are different, and further the flow rates of the multiple liquid streams flowing into the first gap 230 are different, so as to completely extrude the air in the first gap 230. Preferably, one notch 221 is provided in the diversion groove 220.

[0061] Furthermore, in combination with Figure 11, the probe slot 125 is disposed in the flow dividing slot 220, and an annular slot is formed between the probe slot 125 and the flow dividing slot 220, and this annular slot is called the flow dividing annular slot 127. At least two flow dividing sheets 128 are provided in the flow dividing annular slot 127. The flow dividing sheets 128 are disposed at the bottom of the flow dividing annular slot 127, and the flow dividing sheets 128 connect the inner side surface of the flow dividing slot 220 and the outer side surface of the probe slot 125 to form a blocking structure in the flow dividing annular slot 127. A plurality of flow dividing sheets 128 are provided in the flow dividing annular slot 127, and the plurality of flow dividing sheets 128 are disposed in different regions of the flow dividing annular slot 127 to divide the flow dividing annular slot 127 into a plurality of overflow tanks 129. The top surface of the flow dividing sheet 128 (this top surface is called the second top surface 1281) is on the same plane as the signal emitting surface 1411, or the second top surface 1281 is farther from the bottom wall 1118 of the liquid storage cavity 110 than the signal emitting surface 1411. The height of the flow dividing sheet 128 is less than the height of the groove wall of the flow dividing slot 220, that is to say, the top surface of the groove wall of the flow dividing slot 220 is closer to the bottom wall 1118 of the liquid storage cavity 110 than the second top surface 1281.

[0062] In this embodiment, two flow dividing sheets 128 are provided in the flow dividing annular slot 127. The two flow dividing sheets 128 are respectively disposed on both sides of the flow dividing annular slot 127 to divide the flow dividing annular slot 127 into two overflow tanks 129, and the two overflow tanks are respectively called the first overflow tank 1291 and the second overflow tank 1292. In one embodiment, the two flow dividing sheets 128 are jointly arranged in a "one-one" structure or an "eight" character structure.

[0063] Combined with Figure 11 , Figure 12 and Figure 13, the notch 221 of the flow dividing groove 220 corresponds to the first overflow groove 1291. When the liquid flows into the installation groove 123, due to the notch 221 provided on the flow dividing groove 220, the liquid will flow into the first overflow groove 1291 from the notch 221. Since the height of the flow dividing piece 128 is less than the height of the groove wall of the flow dividing groove 220, when the first overflow groove 1291 is filled with liquid, the liquid will overflow from the two flow dividing pieces 128 into the second overflow groove 1292. Since the second top surface 1281 of the flow dividing piece 128 and the signal emitting surface 1411 of the probe 141 are on the same plane, or the signal emitting surface 1411 is farther from the bottom 1118 of the liquid storage cavity 110 than the second top surface 1281, in addition to overflowing into the second overflow groove 1292, the liquid will also overflow over the groove wall of the probe groove 125 and flow into the first gap 230. The liquid also has a flowing tendency from the side of the first overflow groove 1291 to the side of the second overflow groove 1292, so that the liquid slowly squeezes the air in the first gap 230 from the first overflow groove 1291 to the second overflow groove 1292 until the liquid completely squeezes out the air in the first gap 230 and the liquid completely fills the first gap 230, so that there is no air in the first gap 230, which is convenient for the water level detector 140 to detect the water level well. In the third embodiment, combined with Figure 8 and Figure 11 , the variable speed structure simultaneously includes the flow dividing protrusion 210 and the flow dividing groove 220. Combined with Figure 14 and Figure 15 , the flow rates of multiple liquid flows flowing into the first gap 230 are changed respectively through the flow dividing protrusion 210 and the flow dividing groove 220. Under the dual action of the flow dividing protrusion 210 and the flow dividing groove 220, the air in the first gap 230 is completely squeezed out, which is convenient for the water level detector 140 to detect the water level of the liquid in the liquid storage cavity 110 well.

[0064] In one embodiment, combined with Figure 4 , a water level detection groove 116 is further provided at the bottom of the liquid storage cavity 110. The water level detection groove 116 extends convexly from the bottom 1112 of the inner cavity 111 towards the installation groove 123, and the abutting portion 115 is arranged at the bottom of the water level detection groove 116. Combined with Figure 6, the extending path of the water level detection groove 116 is parallel to the extending path of the inner cavity 111, and the extending path of the water level detection groove 116 is also perpendicular to the bottom 1112 of the inner cavity 111, so that the transmitting path of the ultrasonic signal emitted by the probe 141 in contact with the abutting portion 115 is perpendicular to the horizontal plane of the liquid in the inner cavity 111. The water level detection groove 116 is inserted into the installation groove 123, so that the probe 141 of the water level detector 140 arranged in the installation groove 123 is convenient to be in contact with the abutting portion 115, so that the water level detector 140 can detect the water level in the inner cavity 111, and the spatial layout between the liquid storage cavity 110 and the base 120 can be optimized, and the space utilization rate can be improved.

[0065] Combining the first embodiment and the third embodiment, the diversion protrusion 210 in the first embodiment and the third embodiment is arranged at the bottom of the water level detection groove 116.

[0066] The control unit 160 obtains the time interval between the emission of the ultrasonic signal and the reception of the echo signal when the ultrasonic signal is emitted once from the water level detector 140, and can calculate the distance data between the horizontal plane of the liquid in the inner cavity 111 and the bottom of the water level detection groove 116. Then, the control unit 160 subtracts the depth of the water level detection groove 116 and / or the thickness of the diversion protrusion 210 from the distance data between the horizontal plane of the liquid in the inner cavity 111 and the bottom of the water level detection groove 116, and the distance between the horizontal plane of the liquid in the inner cavity 111 and the cavity of the inner cavity 111 can be obtained, that is, the water level depth of the liquid in the inner cavity 111.

[0067] In a typical embodiment of the present invention, the humidifier 100 is further provided with an atomization channel. Combining Figure 4 , a water outlet hole 117 is provided at the first end of the atomization channel, and the water outlet hole 117 is arranged at the bottom of the liquid storage cavity 110, that is to say, the water outlet hole 117 is arranged at the bottom 1112 of the inner cavity 111. The second end of the atomization channel is an exhaust channel 118 formed in the inner cavity 111. The atomization channel further includes a water outlet groove 124 communicating the water outlet hole 117 and the exhaust channel 118, and the water outlet groove 124 is arranged at the top of the base 120. Combining Figure 3 , the exhaust channel 118 includes a first exhaust port 1181 arranged at the bottom of the inner cavity 111 and a second exhaust port 1182 arranged at the top of the liquid storage cavity 110. In one embodiment, the water outlet groove 124 and the installation groove 123 together form a receiving groove.

[0068] Combining Figure 5, the atomizer 130 is disposed in the water tank 124. The liquid in the inner cavity 111 flows into the water tank 124 from the water outlet hole 117. The control unit 160 controls the atomizer 130 to operate, and the atomizer 130 atomizes the liquid in the water tank 124 to form mist, and the mist is discharged from the humidifier 100 through the exhaust duct 118. Preferably, the atomizer 130 is also an ultrasonic sensor, and the atomizer 130 high-frequency vibrates the liquid in the water tank 124 to atomize the liquid into mist.

[0069] Combined with Figure 6 , a blower 170 is further disposed in the water tank 124. The blower 170 is disposed on one side of the atomizer 130. The blower 170 is used to provide wind power to blow the mist formed by the atomizer 130 from the water tank 124 into the exhaust duct 118 through the first exhaust port 1181, and is discharged from the humidifier 100 through the second exhaust port 1182 of the exhaust duct 118.

[0070] In order to control the amount of liquid flowing from the inner cavity 111 into the water tank 124, a water control assembly is disposed in the atomization channel. Combined with Figure 16 , the water control assembly includes a water outlet valve 181, a floating structure 182 and a lever assembly 183. The water outlet valve 181 passes through the water outlet hole 117. The floating structure 182 is disposed in the water tank 124. The water outlet valve 181 is lever-connected to the floating structure 182. The undulation of the floating structure 182 is controlled by the amount of liquid in the water tank 124, so as to control the opening and closing of the water outlet valve 181, thereby adjusting the amount of liquid in the water tank 124.

[0071] Specifically, combined with Figure 17 , the water outlet valve 181 includes a water outlet column 1811, a telescopic spring 1812 and a water stop piece 1813. The water outlet column 1811 is sleeved in the telescopic spring 1812, and the telescopic spring 1812 and the water outlet column 1811 jointly pass through the water outlet hole 117. The water stop piece 1813 is disposed in the inner cavity 111. The water stop piece 1813 can contact the bottom 1112 of the inner cavity 111 to close the water outlet hole 117, so that the liquid in the inner cavity 111 cannot enter the water outlet hole 117 and flow into the water tank 124.

[0072] The lever assembly 183 includes a support base 1831 and a lever 1832. The support base 1831 is disposed in the drain trough 124. The support base 1831 includes a pair of support pieces 1833. Each support piece 1833 is respectively provided with a rotation hole 1834, and two corresponding rotation holes 1834 are formed by the pair of support pieces 1833. Two rotation columns 1835 are respectively provided on both sides of the lever. The rotation columns 1835 are fixedly connected to the lever 1832. The two rotation columns 1835 are respectively inserted into the two rotation holes 1834 of the pair of support pieces 1833, so that the two ends of the lever 1832 can move relatively up and down with the assistance of the rotation columns 1835.

[0073] The density of the suspension structure 182 is less than the density of the liquid flowing into the drain trough 124, so that the suspension structure 182 can float on the liquid in the drain trough 124, and the suspension structure 182 can float up and down with the change of the liquid level in the drain trough 124. In one embodiment, the suspension structure 182 is in any one of a wedge shape, a spherical shape, an ellipsoidal shape, and a cuboid shape.

[0074] The first end of the drain column 1811 is connected to the water stop piece 1813, and the second end of the drain column 1811 is connected to the lever 1832. The first end of the lever 1832 is connected to the second end of the drain column 1811, and the second end of the lever 1832 is connected to the suspension structure 182.

[0075] Combined Figure 16 with Figure 17 , the suspension structure 182 floats on the liquid in the drain trough 124. The suspension structure 182 floats up and down with the liquid level in the drain trough 124, driving the second end of the lever 1832 to move up and down, thereby driving the first end of the lever 1832 to move in the opposite direction of the second end of the lever 1832, and further driving the drain column 1811 to move up and down, so that the water stop piece 1813 releases or closes the drain hole 117.

[0076] Specifically, when the water stop piece 1813 releases the closure of the drain hole 117, the liquid in the inner cavity 111 flows into the drain trough 124 from the drain hole 117, causing the liquid level in the drain trough 124 to rise. The suspension structure 182 floating on the liquid in the drain trough 124 raises the distance from the bottom of the drain trough 124. The suspension structure 182 drives the second end of the lever 1832 to move upward, and the first end of the lever 1832 sinks, further driving the drain column 1811 to move towards the bottom of the drain trough 124. The drain column 1811 then drives the water stop piece 1813 to gradually move towards the drain hole 117 until the drain hole 117 is closed.

[0077] In one embodiment, in combination Figure 16 The inner cavity 111 is further provided with a filter structure 190, which is arranged corresponding to the drain hole 117. The filter structure 190 filters solid objects to prevent the solid objects from entering the drain tank 124 through the drain hole 117 and clogging the drain tank 124. Preferably, the filter structure 190 is a filter net.

[0078] Furthermore, a receiving chamber 191 is provided in the filtering structure 190 , and the receiving chamber 191 is used to receive the structure of the drain valve 181 disposed in the inner cavity 111 , so as to prevent solid objects from entering the drain valve 181 and affecting the use of the drain valve 181 .

[0079] In an exemplary embodiment of the present invention, Figure 1 The display screen 150 is disposed on the outer wall of the liquid storage cavity 110 or the outer wall of the base 120. After the control unit 160 obtains the water level of the liquid in the inner cavity 111, the water level information is converted into a control signal, and the control signal is output to the display screen 150 to control the display screen 150 to display the corresponding water level information. The user obtains the water level information of the humidifier 100 through the display screen 150, so as to add the corresponding liquid to the humidifier 100 in time.

[0080] In one embodiment, the liquid storage cavity 110 further includes a sealing cover 119, which is used to cover the opening 1111 of the inner cavity 111, and the second exhaust port 1182 corresponding to the exhaust channel 118 is provided with a third exhaust hole 1191, and the second exhaust port 1182 is connected to the third exhaust hole 1191 to facilitate the dispersal of mist to the outside. When the amount of liquid in the inner cavity 111 is insufficient, the sealing cover 119 can be removed to replenish the corresponding liquid for the humidifier 100.

[0081] In one embodiment, the humidifier 100 is electrically connected to an external power source 200 via a cable to power the humidifier 100. In another embodiment, the humidifier 100 has a built-in power source 200, and the built-in power source 200 is electrically connected to the control unit 160 to power the humidifier 100.

[0082] To summarize, the humidifier of the present invention changes the flow rate of the liquid flowing into the gap between the signal emitting surface of the probe of the water level detector and the abutting surface of the abutting part by setting a variable speed structure, so as to completely discharge the air in the gap, so that the water level detector will not fail due to interference from the air medium, and the water level detector can well detect the water level changes of the liquid in the liquid storage chamber.

[0083] The above description is only a preferred embodiment of the present invention and an explanation of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present invention is not limited to the technical solutions formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above inventive concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) having similar functions in the present invention.

[0084] Although the subject matter has been described in language specific to structural features and / or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. On the contrary, the specific features and acts described above are merely example forms for implementing the claims.

Claims

1. A humidifier, characterized in that, It includes a liquid storage cavity, a base, a water level detector and a control unit. The liquid storage cavity is located on the base. The water level detector is arranged on the base. An abutting portion is formed at the bottom of the liquid storage cavity. The probe of the water level detector abuts against the abutting portion. A variable speed structure for changing the water flow speed is provided around the probe and / or the abutting portion. The control unit is used to control the water level detector to detect the water level of the liquid storage cavity. The variable speed structure includes a flow splitting protrusion and / or a flow splitting groove; The flow splitting protrusion is formed on the bottom of the liquid storage cavity and protrudes towards the base. The abutting portion is arranged on the flow splitting protrusion; The flow splitting groove is arranged on the base. At least one notch is provided on the groove wall of the flow splitting groove. The probe is arranged in the flow splitting groove.

2. The humidifier according to claim 1, wherein, A probe groove is provided in the flow splitting groove. The probe is arranged in the probe groove. A flow splitting ring groove is formed between the probe groove and the flow splitting groove. The probe groove and the flow splitting groove are connected by a flow splitting piece. At least two flow splitting pieces are provided in the flow splitting ring groove to divide the flow splitting ring groove into at least two overflow grooves.

3. The humidifier according to claim 2, characterized in that, The notch corresponds to one of the two overflow grooves.

4. The humidifier according to claim 2, wherein The probe includes a signal emitting surface. The signal emitting surface is in the same plane as the top surface of the flow splitting piece, or the signal emitting surface is farther from the bottom of the liquid storage cavity than the top surface of the flow splitting piece. The abutting portion includes an abutting surface. The abutting surface abuts against the signal emitting surface.

5. The humidifier according to claim 4, characterized in that, The height of the flow splitting piece is less than the depth of the flow splitting groove.

6. The humidifier according to claim 1, wherein, A water level detection groove protruding and extending towards the base is provided at the bottom of the liquid storage cavity. The abutting portion is arranged at the bottom of the water level detection groove.

7. The humidifier according to claim 1, characterized in that, The water level detector is an ultrasonic sensor.

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