Humidification tank capable of locking water twice

Abstract

The invention relates to a humidifying tank capable of locking water twice, and relates to the technical field of humidifying tanks. The humidifying tank capable of locking water twice comprises a tank body, a valve body assembly and a floater, the valve body assembly and the floater are arranged in the tank body, and the valve body assembly comprises a first valve hole, a second valve hole located above the first valve hole and a secondary plugging element arranged between the first valve hole and the second valve hole. When the floater cannot block the first valve hole, the first valve hole or the second valve hole can still be blocked through the secondary blocking element, so that the situation that liquid is blown into a pipeline due to the fact that the liquid level in the humidifying tank is too high is avoided, and the use safety is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of humidifying cans, and particularly to a humidifying can capable of secondary water locking. Background Art

[0002] When ventilating a patient, before the ventilating gas is supplied to the patient, it usually enters a humidifying can for heating and humidifying to improve comfort. An important aspect of the humidifying can is to be able to automatically control the internal water volume, that is, the liquid level inside the humidifying can needs to be maintained at a substantially stable level. Existing humidifying cans generally control the liquid level inside the humidifying can through a float. That is, when the liquid level in the humidifying can is at a certain level, the float can float up to close the water inlet channel, so that the liquid cannot enter the humidifying can; when the liquid in the humidifying can drops, the float drops accordingly and the water inlet channel is opened, so that the liquid is fed into the humidifying can again. In this way, the liquid in the humidifying can can always be maintained at this level. However, the prerequisite for such a humidifying can to lock water is that the float is always effective, that is, when the float floats up, it needs to close the water inlet channel. However, due to various reasons such as aging, damage, and notches of the float during use, the sealing performance of the float may decrease, and in severe cases, it may cause failure to close the water inlet channel, resulting in the liquid level in the humidifying can being higher than the predetermined level. At this time, the water in the humidifying can will enter the airway, causing the patient to cough, and in severe cases, it may even threaten the patient's life safety. Summary of the Invention

[0003] The present invention provides a humidifying can capable of secondary water locking to solve at least one of the above technical problems.

[0004] The present invention provides a humidifying can capable of secondary water locking, including a can body, a valve body assembly and a float disposed in the can body. The valve body assembly includes a first valve hole, a second valve hole located above the first valve hole, and a secondary sealing element disposed between the first valve hole and the second valve hole. The first valve hole and the second valve hole are arranged to be movable relative to each other. Wherein, the float is arranged towards the first valve hole, and the float is configured to move to a first position blocking the first valve hole when the liquid level in the can body is at a first liquid level; and when the liquid level in the can body is at a second liquid level, move to a second position where the first valve hole and the second valve hole move relative to each other, and then the secondary sealing element blocks the first valve hole or the second valve hole, and the second liquid level is higher than the first liquid level.

[0005] In one embodiment, the valve body assembly includes a main valve frame and a secondary valve frame. The first valve hole is provided on the main valve frame, the second valve hole is provided on the secondary valve frame, and the secondary sealing element is connected to the main valve frame or the secondary valve frame;

[0006] Wherein, when the liquid level in the tank body is at the second liquid level, the float is configured to be movable to contact the main valve frame and push the main valve frame to move towards the secondary valve frame, thereby driving the secondary plugging element to move towards the second valve hole and plug the second valve hole, or driving the secondary plugging element to move towards the first valve hole and plug the first valve hole.

[0007] In one embodiment, the valve body assembly further includes a telescopic frame connected to the main valve frame and the secondary valve frame respectively. When the first valve hole and the second valve hole are not plugged, they are in fluid communication through the telescopic frame. The secondary plugging element is arranged in the telescopic frame, and the telescopic frame is configured to contract or extend when the main valve frame moves towards or away from the secondary valve frame.

[0008] In one embodiment, the telescopic frame is made of a flexible material, a rigid material or a semi-rigid material, and the telescopic frame is configured to be foldable or compressible in the moving direction of the main valve frame.

[0009] In one embodiment, the secondary plugging element includes a plugging bracket fixedly connected to the main valve frame and a first flexible plugging head connected to the plugging bracket. The first flexible plugging head faces the second valve hole, and the secondary plugging element is configured such that when it moves towards the second valve hole, the first flexible plugging head contacts and plugs the second valve hole.

[0010] In one embodiment, a connecting portion is provided at one end of the secondary valve frame close to the main valve frame, and the second valve hole is provided on the connecting portion. The secondary plugging element includes a second flexible plugging head that covers the connecting portion;

[0011] The secondary plugging element is configured such that when the main valve frame moves towards the secondary valve frame, the second flexible plugging head plugs the first valve hole from the upstream side of the first valve hole.

[0012] In one embodiment, the main valve frame includes a recessed portion, the first valve hole penetrates through the wall portion of the recessed portion, the second flexible plugging head is arranged opposite to the recessed portion, and the second flexible plugging head is configured to be movable to insert into the recessed portion to form a seal with the wall portion of the recessed portion so as to plug the first valve hole.

[0013] In one embodiment, the float includes a float housing having a hollow structure and a float seal disposed at the upper end of the float housing. The float housing is configured to provide sufficient buoyancy such that when the liquid level in the tank is at a first liquid level, the float moves upward to cause the float seal to block the first valve hole; and when the liquid level in the tank is at a second liquid level, the float moves upward and drives the relative movement of the first valve hole and the second valve hole.

[0014] In one embodiment, it further includes a float positioning member located below the main valve frame. A positioning portion for accommodating the valve body assembly is provided in the tank, and the float positioning member is fixedly connected to the positioning portion.

[0015] The float positioning member includes a float channel. The float seal is disposed in the float channel. When the float seal moves in the float channel and extends beyond the float channel, the float seal can contact the main valve frame.

[0016] In one embodiment, it further includes a heating bottom plate disposed at the bottom of the tank. The bottom end of the tank is hermetically connected to the heating bottom plate through a tank seal.

[0017] In one embodiment, an air inlet, an air outlet, and a water inlet fluidly connected to the second valve hole are respectively provided on the tank. The air inlet and the air outlet are respectively fluidly connected to the interior of the tank.

[0018] Compared with the prior art, the advantages of the present invention are as follows: when the float cannot block the first valve hole due to various reasons such as aging, damage, or having a notch, the liquid can still enter the tank from the first valve hole, thereby further increasing the liquid level in the tank. Then, due to the increase in the liquid level, the float further moves, thereby pushing the first valve hole and the second valve hole to move relatively until a secondary blocking element between the first valve hole and the second valve hole blocks one of the first valve hole and the second valve hole, and the liquid cannot enter the tank, so that the liquid level in the tank is maintained at the second liquid level. Herein, the second liquid level is the height position where the liquid will not be blown into the pipeline. Therefore, when the float of the humidifying tank of the present invention cannot block the first valve hole, it can still block the first valve hole or the second valve hole through the secondary blocking element, so that the liquid level in the humidifying tank will not be too high to cause the liquid to be blown into the pipeline, thereby improving the safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Hereinafter, the present invention will be described in more detail based on embodiments and with reference to the drawings.

[0020] Figure 1 is an exploded view of the humidifying tank capable of secondary water locking in Embodiment 1 of the present invention;

[0021] Figure 2 It is a cross-sectional view of the humidifying tank capable of secondary water locking in Embodiment 1 of the present invention; the state in which both the first valve hole and the second valve hole are not blocked is shown therein;

[0022] Figure 3 It is a cross-sectional view of the humidifying tank capable of secondary water locking in Embodiment 1 of the present invention; the state in which the first valve hole is blocked and the second valve hole is not blocked is shown therein;

[0023] Figure 4 It is a cross-sectional view of the humidifying tank capable of secondary water locking in Embodiment 1 of the present invention; the state in which both the first valve hole and the second valve hole are blocked is shown therein;

[0024] Figure 5 It is Figure 2 The perspective view of the valve body assembly shown;

[0025] Figure 6 It is Figure 2 The cross-sectional view of the valve body assembly shown (both the first valve hole and the second valve hole are not blocked);

[0026] Figure 7 It is Figure 2 The perspective view of the secondary blocking element shown;

[0027] Figure 8 It is Figure 7 The perspective view of the blocking bracket shown;

[0028] Figure 9 It is Figure 2 The perspective view of the float positioning member shown;

[0029] Figure 10 It is Figure 9 The cross-sectional view of the float positioning member shown;

[0030] Figure 11 It is Figure 2 The perspective view of the float shown;

[0031] Figure 12 It is Figure 11 The cross-sectional view of the float shown;

[0032] Figure 13 It is Figure 2 The perspective view of the tank body seal shown;

[0033] Figure 14 It is Figure 2 The perspective view of the heating bottom plate shown;

[0034] Figure 15 It is a cross-sectional view of the valve body assembly in Embodiment 2 of the present invention, in which the state in which both the first valve hole and the second valve hole are not blocked is shown;

[0035] Figure 16 FIG. Figure 16 is a cross-sectional view of the valve body assembly in Embodiment 2 of the present invention, showing the state in which the second valve holes are all blocked.

[0036] Reference numerals:

[0037] 100, tank body; 200, valve body assembly; 300, float positioning member; 400, float; 500, tank body seal; 600, heating bottom plate;

[0038] 110, air inlet; 120, water inlet; 130, positioning portion;

[0039] 210, secondary valve holder; 211, second valve hole; 212, connecting portion; 213, fluid passage;

[0040] 220, telescopic holder; 230, secondary blocking element;

[0041] 250, main valve holder; 251, first valve hole; 252, recessed portion; 253, wall portion; 254, main valve holder cavity;

[0042] 231, blocking bracket; 232, first flexible blocking head; 233, second flexible blocking head

[0043] 310, inner positioning rib; 320, outer positioning rib; 330, limiting platform; 340, float passage;

[0044] 410, float seal; 420, upper float shell; 430, lower float shell. Detailed implementation manners

[0045] The present invention will be further described below with reference to the accompanying drawings.

[0046] Example 1

[0047] As Figures 1 - 14 shown, the present invention provides a humidifying tank capable of secondary water locking, including a tank body 100 and a valve body assembly 200 and a float 400 disposed in the tank body 100. As Figure 1 and Figure 2 shown, the tank body 100 is generally a columnar structure, and an air inlet 110 (which may be multiple) is provided at its upper end, respectively for introducing gas into the tank body 100 and outputting the humidified gas in the tank body 100 to the outside. In addition, a water inlet 120 is further provided on the tank body 100, which is connected to an external water source for introducing liquid (for example, water) into the tank body 100.

[0048] The liquid in the tank body 100 has a first liquid level and a second liquid level, where the second liquid level is higher than the first liquid level, and the second liquid level is the height position at which the liquid will not be blown into the pipeline, thus causing the risk of coughing for the patient or user. Therefore, the first liquid level and the second liquid level can be preset according to the specific usage of the tank body 100.

[0049] As Figure 2 , Figure 3 and Figure 4 shown, the valve body assembly 200 includes a first valve hole 251, a second valve hole 211 located above the first valve hole 251, and a secondary sealing element 230 disposed between the first valve hole 251 and the second valve hole 211. When the first valve hole 251 and the second valve hole 211 are not blocked, the two are in fluid communication, and the second valve hole 211 is in fluid communication with the water inlet 120. Therefore, as Figure 2 shown, the liquid can enter the tank body 100 through the water inlet 120, flow through the second valve hole 211 and the first valve hole 251 in sequence.

[0050] The second valve hole 211 and the first valve hole 251 are arranged to be movable relative to each other. Specifically, in the first embodiment, it can be that the first valve hole 251 moves relative to the second valve hole 211, that is, the first valve hole 251 can move up and down.

[0051] Among them, the float 400 is arranged towards the first valve hole 251, and the float 400 is configured to move to the first position (as Figure 3 shown) where the first valve hole 251 is blocked when the liquid level in the tank body 100 is at the first liquid level; and when the liquid level in the tank body 100 is at the second liquid level, it moves to the second position (as Figure 4 shown) where the first valve hole 251 and the second valve hole 211 move relative to each other, and then the secondary sealing element 230 blocks the first valve hole 251 or the second valve hole 211.

[0052] When the liquid enters the tank body 100 through the water inlet 120, the second valve hole 211 and the first valve hole 251, as the liquid in the tank body 100 increases, the float 400 moves upward due to the gradually increasing buoyancy of the liquid. When the liquid level in the tank body 100 reaches the first liquid level, the float 400 moves upward and blocks the first valve hole 251 from the lower side of the first valve hole 251, as Figure 3 shown. At this time, the liquid stops entering the tank body 100; on the contrary, when the liquid in the tank body 100 decreases due to use, the float 400 moves downward due to the gradually decreasing buoyancy of the liquid, so that the float 400 releases the first valve hole 251, as Figure 2 shown. At this time, the liquid can enter the tank body 100 again through the water inlet 120, the second valve hole 211 and the first valve hole 251. Repeating this way can achieve automatic water filling and automatic water stopping of the humidifying tank.

[0053] In the above ideal state, the liquid level in the tank body 100 can always be maintained at the first liquid level. However, the float 400 may fail to block the first valve hole 251 due to transportation, vibration, aging, damage, or any other possible situations. If the float 400 fails to block the first valve hole 251, the liquid will continuously enter the tank body 100 through the water inlet 120, the second valve hole 211, and the first valve hole 251, causing the liquid level in the tank body 100 to continuously rise. Then, the float 400 will receive a greater buoyancy force, causing the float 400 to move further upward. At this time, since the float 400 has already contacted the first valve hole 251 (but failed to block the first valve hole 251), during the further upward movement of the float 400, the float 400 will drive the first valve hole 251 and the secondary blocking element 230 to move upward together until the secondary blocking element 230 moves upward to contact and block the second valve hole 211, as Figure 4 shown. When the second valve hole 211 is blocked by the secondary blocking element 230, the liquid can no longer be input into the tank body 100, thereby maintaining the liquid level of the tank body 100 at the safe second liquid level.

[0054] Therefore, the main idea of the present invention is that when the float 400 fails to block the first valve hole 251, it is still through the further upward movement of the float 400 to move the secondary blocking element 230 to block the second valve hole 211 (i.e., secondary water locking), so that the liquid cannot continue to enter the tank body 100. Therefore, the present invention can achieve secondary water locking through a single float 400. Since no additional floating element is provided, there is no need for a very high liquid level to trigger the additional floating element, thus ensuring that the liquid level in the tank body 100 is maintained at the safe first liquid level or second liquid level.

[0055] In addition, since the secondary blocking element 230 is located above the first valve hole 251, when the secondary blocking element 230 performs the blocking, it blocks upstream of the first valve hole 251. Therefore, different from the existing technical solutions that block downstream of the first valve hole, the present invention blocks upstream of the first valve hole 251, which can avoid the hidden danger of water accumulation between the first valve hole 251 and the second valve hole 211, thereby further improving the safety of use.

[0056] As Figure 5 and Figure 6 shown, the valve body assembly 200 includes a main valve frame 250 and a secondary valve frame 210, and the first valve hole 251 is provided on the main valve frame 250. Specifically, as Figure 6As shown, a main valve frame cavity 254 is provided in the main valve frame 250, and its lower end is an open structure. A recess 252 extending into the main valve frame cavity 254 is provided at the upper end of the main valve frame 250. A first valve hole 251 is provided on the recess 252 and penetrates through the wall portion 253 of the recess 252. Therefore, when the first valve hole 251 is not blocked, it can be in fluid communication with the main valve frame cavity 254.

[0057] A second valve hole 211 is provided on the secondary valve frame 210. Specifically, as Figure 6 shown, a fluid passage 213 is provided on the secondary valve frame 210. The second valve hole 211 is provided at the bottom end of the fluid passage 213 and penetrates through the bottom end of the fluid passage 213. The fluid passage 213 is in fluid communication with the water inlet 120. Therefore, the liquid can flow through the fluid passage 213 and reach the second valve hole 211 through the water inlet 120. In addition, the fluid passage 213 is disposed opposite to the recess 252, and the axes of the first valve hole 251 and the second valve hole 211 may or may not be aligned. Then the liquid can enter the tank body 100 by flowing through the fluid passage 213, the second valve hole 211, the recess 252, the first valve hole 251, and the main valve frame cavity 254 in sequence through the water inlet 120.

[0058] As Figure 6 shown, a secondary plugging element 230 is connected to the main valve frame 250. Among them, the float 400 is configured to be movable into contact with the main valve frame 250 and push the main valve frame 250 toward the secondary valve frame 210 when the liquid level in the tank body 100 is at the second liquid level, so as to drive the secondary plugging element 230 to move toward the second valve hole 211 and block the second valve hole 211.

[0059] Furthermore, the valve body assembly 200 further includes a telescopic frame 220 respectively connected to the main valve frame 250 and the secondary valve frame 210. The telescopic frame 220 is a hollow structure. Therefore, when the first valve hole 251 and the second valve hole 211 are not blocked, the two are in fluid communication through the telescopic frame 220. As Figure 6 shown, the liquid can enter the tank body 100 by flowing through the fluid passage 213, the second valve hole 211, the telescopic frame 220, the recess 252, the first valve hole 251, and the main valve frame cavity 254 in sequence through the water inlet 120.

[0060] The secondary plugging element 230 is disposed in the telescopic frame 220 and connected to the upper end of the recess 252. The telescopic frame 220 is configured to contract or expand when the main valve frame 250 moves toward or away from the secondary valve frame 210.

[0061] For example, the telescopic frame 220 is made of a flexible material, a rigid material, or a semi-rigid material, and the telescopic frame 220 is configured to be foldable or compressible in the moving direction of the main valve frame 250. Therefore, when an upward thrust is received by the main valve frame 250 and it moves upward, the telescopic frame 220 is compressed, and its internal space decreases. Then, the secondary sealing element 230 moves together with the main valve frame 250 until the secondary sealing element 230 seals the second valve hole 211. The purpose of setting the telescopic frame 220 is that by selecting the appropriate softness and hardness of the telescopic frame 220 (the force for folding or compressing it) and the buoyancy of the float 400, when the liquid in the tank 100 is at the first liquid level, the float 400 can float up to seal the first valve hole 251, but it is not sufficient to cause the main valve frame 250 to move further and fold or compress the telescopic frame 220; when the liquid in the tank 100 is at the second liquid level, the float 400 can further and sufficiently cause the main valve frame 250 to move further and fold or compress the telescopic frame 220, so that the secondary sealing element 230 moves upward to seal the second valve hole 211. Conversely, when the liquid level in the tank 100 drops, the restoring force of the telescopic frame 220 helps the main valve frame 250 to descend, so that the secondary sealing element 230 releases the second valve hole 211.

[0062] As Figure 7 and Figure 8 shown, and please refer to Figure 6 , the secondary sealing element 230 includes a sealing support 231 fixedly connected to the main valve frame 250 and a first flexible sealing head 232 connected to the sealing support 231. The first flexible sealing head 232 is arranged facing the second valve hole 211. The secondary sealing element 230 is configured such that when it moves toward the second valve hole 211, the first flexible sealing head 232 contacts and seals the second valve hole 211. The first flexible sealing head 232 can be made of a flexible and sealable material, such as silicone rubber, etc. When the secondary sealing element 230 moves upward, the first flexible sealing head 232 can contact the second valve hole 211 and deform, thereby sealing the second valve hole 211.

[0063] The sealing support 231 has a plurality of legs for connecting with the main valve frame 250, and the two can be connected by appropriate means such as bonding and interference fit. The present invention does not limit this. As Figure 6 shown, there are gaps between the legs of the sealing support 231, so that liquid can flow through these gaps and into the recess 252.

[0064] As Figure 11 and Figure 12As shown, the float 400 includes a float housing having a hollow structure and a float seal 410 provided at the upper end of the float housing. The float housing is configured to provide sufficient buoyancy such that when the liquid level in the tank 100 is at the first liquid level, the float 400 moves upward to cause the float seal 410 to block the first valve hole 251; and when the liquid level in the tank 100 is at the second liquid level, the float 400 moves upward and drives the first valve hole 251 to move relative to the second valve hole 211.

[0065] As Figure 12 shown, the float housing includes an upper float shell 420 and a lower float shell 430, which are connected to form an internally hollow structure, thereby providing the required buoyancy. The float seal 410 is provided at the upper end of the upper float shell 420 and can be made of a flexible and sealable material, such as silicone rubber. When the float 400 moves upward, the float seal 410 can move to extend from the lower end of the main valve frame 250 into the main valve frame cavity 254 (please see Figure 6 ) and contact the first valve hole 251 to deform, thereby blocking the first valve hole 251.

[0066] As Figure 2 shown, the humidifying tank of the present invention further includes a float positioning member 300 located below the main valve frame 250, and the float positioning member 300 is fixedly provided in the tank 100. Specifically, a positioning portion 130 for accommodating the valve body assembly 200 is provided in the tank 100. As Figure 9 and Figure 10 shown, the float positioning member 300 includes a float channel 340. An outer positioning rib 320 is provided on the outer circumference of the float channel 340, and it is fixedly connected to the positioning portion 130.

[0067] A plurality of inner positioning ribs 310 are provided on the inner circumference of the float channel 340, which can define the axis of the float channel 340. The float seal 410 is provided in the float channel 340, thereby restricting the circumferential movement of the float seal 410, so that the float 400 can displace in a substantially vertically upward (or downward) direction.

[0068] The float seal 410 moves upward in the float channel 340 and can contact the main valve frame 250 to push the main valve frame 250 upward at a higher liquid level. In addition, a limiting platform 330 is provided at the upper end of the float channel 340, and the limiting platform 330 can limit the maximum displacement of the main valve frame 250 moving downward, that is, the main valve frame 250 can move downward at most until its lower end contacts the limiting platform 330.

[0069] As Figure 1 、 Figure 13 and Figure 14As shown in the figure, the humidifying tank of the present invention further includes a heating bottom plate 600 provided at the bottom of the tank body 100. The bottom end of the tank body 100 is hermetically connected to the heating bottom plate 600 through a tank body seal 500. The heating bottom plate 600 can be made of a metal capable of conducting heat, such as aluminum alloy, etc. The heating bottom plate 600 conducts heat into the tank body 100 to keep the liquid in the tank body 100 at a certain temperature and generate water vapor. The tank body seal 500 is made of a material that is easy to seal, preferably silicone. The tank body seal 500 and the tank body 100 and the heating bottom plate 600 form a sealed and water-tight chamber, and the chamber can accommodate liquid and gas.

[0070] Example 2

[0071] The difference between this Embodiment 2 and the above Embodiment 1 is that when the secondary plugging element 230 moves, it does not plug the second valve hole 211, but plugs the first valve hole 251.

[0072] As Figures 15 - 16 shown, the secondary plugging element 230 is connected to the secondary valve frame 210. Specifically, a fluid passage 213 is provided on the secondary valve frame 210. A connecting portion 212 is provided at one end of the fluid passage 213 close to the main valve frame 250, and the second valve hole 211 is provided on the connecting portion 212. The second valve hole 211 can be in the form of a notch or a gap on the connecting portion 212, and when it is not plugged, it is in internal fluid communication with the fluid passage 213 and the inside of the telescopic frame 220.

[0073] The secondary plugging element 230 is configured such that when the main valve frame 250 moves towards the secondary valve frame 210, the second flexible plugging head 233 plugs the first valve hole 251. As Figure 15 shown, the setting manner of the main valve frame 250 is the same as that of the main valve frame 250 in the above Embodiment 1. It includes a recessed portion 252, and the first valve hole 251 penetrates through the wall portion 253 of the recessed portion 252. The secondary plugging element 230 is disposed opposite to the recessed portion 252, and the secondary plugging element 230 is configured to be movable to insert into the recessed portion 252 to form a seal with the wall portion 253 of the recessed portion 252 so as to plug the first valve hole 251.

[0074] Specifically, the secondary plugging element 230 includes a second flexible plugging head 233, and the second flexible plugging head 233 covers the connecting portion 212. The material of the second flexible plugging head 233 can be the same as that of the first flexible plugging head 232, such as silicone, etc. As Figure 15 shown, the second flexible plugging head 233 can be configured in the structural form of a bullet head, and it can be matched with the shape of the recessed portion 252.

[0075] When the liquid level in the tank body 100 is at the second liquid level, the float 400 moves further upward and pushes the main valve holder 250 to move towards the secondary valve holder 210. Therefore, the second flexible sealing head 233 will insert into the recess 252. As the main valve holder 250 moves upward closer to the secondary valve holder 210, the second flexible sealing head 233 inserts deeper into the recess 252 through deformation (as Figure 16 shown), so that the second flexible sealing head 233 forms a sealed connection with the wall 253 in the recess 252, and the liquid cannot enter the recess 252 and the first valve hole 251 from the inside of the telescopic frame 220, that is, the first valve hole 251 is blocked. It can be understood that since the second flexible sealing head 233 is located on the upper side of the first valve hole 251, the second flexible sealing head 233 blocks the first valve hole 251 from the upstream side of the first valve hole 251.

[0076] When the liquid level in the tank body 100 is at the first liquid level, the float 400 can block the first valve hole 251 from the downstream side of the first valve hole 251. Since the blocking method at this time is the same as that in the above-mentioned Embodiment 1, this embodiment will not be described in detail here.

[0077] The differences between this Embodiment 2 and the above-mentioned Embodiment 1 have been described in detail above, and the same parts will not be described again. In addition, the various components not described in detail in the above-mentioned Embodiment 1 and Embodiment 2, as well as other structures for realizing the necessary functions of the humidifying tank, can all adopt the existing structural forms, and the present invention will not be described in detail.

[0078] Although the present invention has been described with reference to the preferred embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A humidifying tank capable of secondary water locking, characterized in that It includes a tank body, a valve body assembly and a float arranged in the tank body. The valve body assembly includes a first valve hole, a second valve hole located above the first valve hole, and a secondary sealing element arranged between the first valve hole and the second valve hole. The first valve hole and the second valve hole are arranged to be movable relative to each other. Wherein, the float is arranged towards the first valve hole, and the float is configured to move to a first position blocking the first valve hole when the liquid level in the tank body is at a first liquid level; and when the liquid level in the tank body is at a second liquid level, move to a second position where the first valve hole and the second valve hole move relative to each other, and then the secondary sealing element blocks the first valve hole or the second valve hole, and the second liquid level is higher than the first liquid level.

2. The humidifying can capable of secondary water locking according to claim 1, characterized in that, The valve body assembly includes a main valve frame and a secondary valve frame. The first valve hole is arranged on the main valve frame, the second valve hole is arranged on the secondary valve frame, and the secondary sealing element is connected to the main valve frame or the secondary valve frame; Wherein, the float is configured to be movable to contact the main valve frame and push the main valve frame towards the secondary valve frame when the liquid level in the tank body is at the second liquid level, so as to drive the secondary sealing element to move towards the second valve hole and block the second valve hole or drive the secondary sealing element to move towards the first valve hole and block the first valve hole.

3. The humidifying tank capable of secondary water locking according to claim 2, characterized in that, The valve body assembly further includes a telescopic frame respectively connected to the main valve frame and the secondary valve frame. When the first valve hole and the second valve hole are not blocked, they are in fluid communication through the telescopic frame. The secondary sealing element is arranged in the telescopic frame, and the telescopic frame is configured to contract or extend when the main valve frame moves towards or away from the secondary valve frame.

4. The humidifying jar capable of secondary water locking according to claim 3, wherein The telescopic frame is made of a flexible material, a rigid material or a semi-rigid material, and the telescopic frame is configured to be foldable or compressible in the moving direction of the main valve frame.

5. The humidifying jar capable of secondary water locking according to any one of claims 2-4, characterized in that, The secondary sealing element includes a sealing support fixedly connected to the main valve frame and a first flexible sealing head connected to the sealing support. The first flexible sealing head is arranged towards the second valve hole, and the secondary sealing element is configured that when it moves towards the second valve hole, the first flexible sealing head contacts and blocks the second valve hole.

6. The humidifying tank capable of secondary water locking according to any one of claims 2-4, characterized in that, A connecting portion is arranged at one end of the secondary valve frame close to the main valve frame, the second valve hole is arranged on the connecting portion, and the secondary sealing element includes a second flexible sealing head covering the connecting portion; The secondary sealing element is configured that when the main valve frame moves towards the secondary valve frame, the second flexible sealing head blocks the first valve hole from the upstream side of the first valve hole.

7. The humidifying jar capable of secondary water locking according to claim 6, wherein, The main valve frame includes a recessed portion, the first valve hole penetrates through the wall portion of the recessed portion, the second flexible sealing head is arranged opposite to the recessed portion, and the second flexible sealing head is configured to be movable to insert into the recessed portion to form a seal with the wall portion of the recessed portion so as to block the first valve hole.

8. The humidifying tank capable of secondary water locking according to any one of claims 2-4, characterized in that The float includes a float housing having a hollow structure and a float seal provided at the upper end of the float housing. The float housing is configured to provide sufficient buoyancy such that when the liquid level in the tank is at a first liquid level, the float moves upward to cause the float seal to block the first valve hole; and when the liquid level in the tank is at a second liquid level, the float moves upward and drives the relative movement of the first valve hole and the second valve hole.

9. The humidifying tank capable of secondary water locking according to claim 8, characterized in that, It further includes a float positioning member located below the main valve frame. A positioning portion for accommodating the valve body assembly is provided in the tank, and the float positioning member is fixedly connected to the positioning portion. The float positioning member includes a float channel, and the float seal is disposed in the float channel. When the float seal moves beyond the float channel in the float channel, the float seal can contact the main valve frame.

10. The humidifying tank capable of secondary water locking according to any one of claims 1-4, characterized in that, It further includes a heating bottom plate provided at the bottom of the tank, and the bottom end of the tank is hermetically connected to the heating bottom plate through a tank seal.

11. The humidifying can capable of secondary water locking according to any one of claims 1-4, characterized in that, An air inlet, an air outlet, and a water inlet fluidly connected to the second valve hole are respectively provided on the tank, and the air inlet and the air outlet are respectively fluidly connected to the interior of the tank.

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