CN221557233U - Humidification tank and respiratory treatment equipment - Google Patents

Abstract

The utility model is applicable to the technical field of medical equipment, and provides a humidification tank and respiratory treatment equipment, wherein the humidification tank comprises: the tank body is provided with an inner cavity and a liquid inlet pipe communicated with the inner cavity; the first sealing piece is arranged at one end of the liquid inlet pipe close to the inner cavity and is provided with an infusion hole for communicating the inner cavity with the liquid inlet pipe; the floating ball assembly is movably arranged in the inner cavity and comprises a floating ball main body and a second sealing element which is fixed on the floating ball main body and matched with the first sealing element, the floating ball main body can float upwards and drive the second sealing element to be in contact with the first sealing element so as to seal the infusion hole, and the floating ball main body can sink and drive the second sealing element to be separated from the first sealing element so as to open the infusion hole. The humidifying tank provided by the utility model can reduce the production difficulty and cost, improves the production yield of the humidifying tank, ensures that liquid can smoothly enter and exit the infusion hole, and has good plugging reliability.

Description

Humidification tank and respiratory treatment equipment

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a humidification tank and respiratory treatment equipment.

Background

The humidifying tank is medical consumable matched with the breathing pipeline and the breathing machine, and water in the humidifying tank is heated through the breathing machine, so that gas in the breathing pipe is humidified, the gas becomes wet, the stimulation of the gas to mucous membrane is reduced, alveoli are humidified, the activity of the alveoli is increased, and the exchange of the gas is facilitated. With the continuous improvement of medical technology and health requirements, high-flow respiratory humidification treatment methods have been brought into new guidelines for treating coronaries and pneumonia by the world and the major countries in China and the world, and play a great role.

In the prior art, a liquid inlet pipe is generally integrally formed on a tank body of the humidifying tank, an infusion hole is formed in one end, close to the tank body, of the liquid inlet pipe, liquid is conveyed into the tank body through the infusion hole, and a sealing piece is generally directly used for sealing the infusion hole in the liquid inlet pipe, so that water shutoff of the humidifying tank is realized. Because the tank body is large in volume and the diameter of the infusion hole is small (the diameter is generally set to be 0.5-1.0 mm in industry), and the infusion hole is directly designed on the tank body, the mould structure for processing the tank body becomes more complex, when a mould is used for beer, a barrel needle is slender and is easy to break, so that the production and processing difficulty of a humidifying tank is high and the production yield is low; after the tank body is produced, the liquid can not leak due to the easy occurrence of hole blockage of the infusion hole, or the sealing element can not be completely attached to the end face of the infusion hole of the liquid inlet pipe due to the easy occurrence of the flash phenomenon, the phenomenon that the function of the humidifying tank is invalid due to the incapability of water blockage occurs, and the water blockage reliability is poor.

Disclosure of utility model

The utility model provides a humidifying tank, which aims to solve the problems of high production difficulty, low production yield and poor water blocking reliability of the humidifying tank in the prior art.

The present utility model is achieved by providing a humidification tank comprising:

The tank body is provided with an inner cavity and is provided with a liquid inlet pipe communicated with the inner cavity;

The first sealing piece is arranged at one end of the liquid inlet pipe, which is close to the inner cavity, and is provided with an infusion hole which is communicated with the inner cavity and the liquid inlet pipe; and

The floating ball assembly is movably arranged in the inner cavity and comprises a floating ball main body and a second sealing element which is fixed on the floating ball main body and matched with the first sealing element, the floating ball main body can float upwards and drive the second sealing element to be contacted with the first sealing element so as to seal the infusion hole, and the floating ball main body can sink and drive the second sealing element to be separated from the first sealing element so as to open the infusion hole.

Preferably, the first sealing member is provided with a first end face through which the infusion hole passes, the second sealing member is provided with a second end face matched with the first end face, the second end face can be in close contact with the first end face to seal the infusion hole, and the second end face can be separated from the first end face to open the infusion hole.

Preferably, the first sealing member is sleeved and fixed on the liquid inlet pipe, and the first sealing member wraps one end, close to the inner cavity, of the liquid inlet pipe.

Preferably, the first sealing member is provided with a positioning counter bore matched with the liquid inlet pipe, the positioning counter bore is communicated with the transfusion hole, and the first sealing member is sleeved and fixed on the liquid inlet pipe through the positioning counter bore.

Preferably, the tank body is further provided with a limiting cavity coaxially arranged with the liquid inlet pipe, the floating ball body is provided with a guide part matched with the limiting cavity, the second sealing element is connected with the guide part, the second sealing element and the guide part are movably arranged in the limiting cavity, and a liquid passing gap is formed between the guide part and the inner wall of the limiting cavity.

Preferably, the guide part is hollow, the floating ball body further comprises a fixing column which is arranged inside the guide part and coaxially arranged with the guide part, the fixing column and the guide part enclose to form a mounting groove, and the second sealing element is placed in the mounting groove and sleeved and fixed on the fixing column.

Preferably, a plurality of positioning grooves are circumferentially distributed on the outer peripheral surface of the first sealing member at intervals, a plurality of positioning ribs matched with the positioning grooves in a one-to-one correspondence manner are arranged on the inner wall of the limiting cavity, and each positioning rib is respectively clamped into the corresponding positioning groove.

Preferably, the first sealing member is made of silica gel, and/or the second sealing member is made of silica gel.

Preferably, the humidification tank further comprises:

a rear cover which is covered with the tank body to close the inner cavity; and

And the sealing ring is arranged between the rear cover and the tank body and is used for sealing a gap between the rear cover and the tank body.

The utility model also provides respiratory treatment equipment, which comprises the humidification tank.

According to the humidifying tank provided by the utility model, the first sealing element is arranged, the transfusion hole is arranged on the first sealing element, the first sealing element is arranged on the liquid inlet pipe on the tank body, the second sealing element is arranged on the floating ball component, and when the liquid in the tank body exceeds the preset height, the floating ball component floats upwards and drives the second sealing element to contact with the first sealing element so as to realize the blocking of the transfusion hole; when the liquid level in the tank body is lowered, the floating ball component is lowered and drives the second sealing piece to be separated from the first sealing piece, so that the transfusion hole is opened. Because the transfusion hole is arranged on the first sealing member, but not on the tank body, the liquid inlet pipe does not need to be provided with the transfusion hole with small diameter, the mold structure for processing the tank body is simplified, the molding processing of the tank body is facilitated, the production difficulty and cost of the humidifying tank are reduced, the production yield of the humidifying tank is improved, and the transfusion hole is not easy to be blocked or the phenomenon of flash due to the independent processing and molding of the first sealing member, so that the liquid can smoothly enter and exit the transfusion hole, and the water blocking reliability of the humidifying tank is good.

Drawings

FIG. 1 is a schematic perspective view of a humidification tank provided by an embodiment of the present utility model;

FIG. 2 is an exploded perspective view of a humidification can according to an embodiment of the present utility model;

FIG. 3 is a schematic cross-sectional view of a humidification tank according to an embodiment of the present utility model;

FIG. 4 is an enlarged view of portion A of FIG. 3;

FIG. 5 is a schematic cross-sectional view of a humidification tank according to an embodiment of the present utility model with an infusion port opened;

FIG. 6 is an enlarged view of part B of FIG. 5;

FIG. 7 is an exploded perspective view of a float assembly of a humidification can according to an embodiment of the present utility model;

FIG. 8 is an exploded perspective view of a first seal of a humidification tank provided by an embodiment of the present utility model;

Fig. 9 is a perspective view of a tank body of a humidification tank according to an embodiment of the present utility model.

Reference numerals illustrate:

10. An inner cavity; 1. a tank body; 11. a liquid inlet pipe; 2. a first seal; 20. an infusion hole; 3. a float ball assembly; 31. a floating ball body; 32. a second seal; 110. an inner bore; 7. an air inlet pipe; 8. an air outlet pipe; 4. a rear cover; 5. a seal ring; 21. a first end face; 321. a second end face; 22. positioning the counter bore; 311. a floating ball upper cover; 312. a floating ball lower cover; 12. a limiting cavity; 310. a guide part; 6. a liquid passing gap; 22. a positioning groove; 121. positioning ribs; 313. fixing the column; 314. and a mounting groove.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

According to the humidifying tank provided by the embodiment of the utility model, the first sealing element is arranged, the transfusion hole is arranged on the first sealing element, the first sealing element is arranged on the liquid inlet pipe on the tank body, the second sealing element is arranged on the floating ball component, and when the liquid in the tank body exceeds the preset height, the floating ball component floats upwards and drives the second sealing element to contact with the first sealing element so as to realize the blocking of the transfusion hole; when the liquid level in the tank body is lowered, the floating ball component is lowered and drives the second sealing piece to be separated from the first sealing piece, so that the transfusion hole is opened. Because the transfusion hole sets up on first sealing member, and not set up on the jar body, the feed liquor pipe need not to set up the transfusion hole of minor diameter, has simplified the mould structure of jar body processing, has made things convenient for the shaping processing of jar body, has reduced humidification jar production degree of difficulty and cost, has improved the production yield of humidification jar, and because first sealing member machine-shaping alone, the transfusion hole is difficult for appearing stifled hole or to drape over a knife or a sword phenomenon, guarantees that liquid can pass in and out the transfusion hole smoothly, and has promoted the stifled water reliability of humidification jar greatly, avoids humidification jar functional reliability.

Referring to fig. 1 to 6, a humidification tank provided in an embodiment of the present utility model includes:

A tank body 1 provided with an inner cavity 10, wherein the tank body 1 is provided with a liquid inlet pipe 11 communicated with the inner cavity 10;

The first sealing piece 2 is arranged at one end of the liquid inlet pipe 11 close to the inner cavity 10, and the first sealing piece 2 is provided with an infusion hole 20 which is communicated with the inner cavity 10 and the liquid inlet pipe 11; and

The floating ball assembly 3 is movably arranged in the inner cavity 10, and the floating ball assembly 3 comprises a floating ball main body 31 and a second sealing element 32 which is fixed on the floating ball main body 31 and matched with the first sealing element 2; the floating ball body 31 can float upwards and drive the second sealing element 32 to be in contact with the first sealing element 2 so as to seal the infusion hole 20, and the floating ball body 31 can sink and drive the second sealing element 32 to be separated from the first sealing element 2 so as to open the infusion hole 20.

In the embodiment of the utility model, the first sealing element 2 is arranged, the transfusion hole 20 is formed in the first sealing element 2, the first sealing element 2 is arranged on the liquid inlet pipe 11 of the tank body 1, the floating ball assembly 3 is provided with the second sealing element 32, when the liquid in the tank body 1 exceeds the preset height, the floating ball assembly 3 floats upwards under the action of the floating force, and the second sealing element 32 moves towards the first sealing element 2 and is in close contact with the first sealing element 2, so that the transfusion hole 20 is blocked, and the liquid is prevented from entering the tank body 1; when the liquid in the tank body 1 is partially consumed, the liquid level is lowered, the buoyancy is reduced, the floating ball assembly 3 is lowered, and at the moment, the second sealing element 32 is separated from the first sealing element 2, so that the transfusion hole 20 is opened, and the liquid is continuously conveyed into the tank body 1. Because the transfusion hole 20 is directly arranged on the first sealing element 2, and then the first sealing element 2 is arranged on the tank body 1, the first sealing element 2 and the second sealing element 32 are processed independently of the tank body 1, so that the die structure for processing the tank body 1 is simplified, the forming processing of the tank body 1 is greatly facilitated, the production difficulty and cost of a humidifying tank are reduced, and the production yield of the humidifying tank is improved; moreover, the first sealing element 2 and the second sealing element 32 are easy to open and mold, the production yield of the first sealing element 2 and the second sealing element 32 is easy to ensure, the infusion hole 20 is not easy to block, the liquid can smoothly pass through the infusion hole 20, the matching precision of the first sealing element 2 and the second sealing element 32 is easy to ensure, the edge of the end face of the infusion hole 20 is not easy to occur, the reliability of water blocking realized by the contact matching of the first sealing element 2 and the second sealing element 32 is greatly improved, the reliability of water blocking of the humidification tank is good, and the function of the humidification tank is difficult to fail.

In the embodiment of the present utility model, one end of the liquid inlet pipe 11 extends into the inner cavity 10, and the other end is located outside the inner cavity 10 and is used for connecting with a pipeline of external liquid inlet, so as to be used for conveying liquid into the tank 1, wherein the liquid can be water or other liquid medicines, and the embodiment is not limited. An inner hole 110 is arranged in the liquid inlet pipe 11, the inner hole 110 of the liquid inlet pipe 11 is communicated with an external pipeline and the inner cavity 10, and when the first sealing element 2 is fixedly arranged on the liquid inlet pipe 11, the inner hole 110 of the liquid inlet pipe 11 is communicated with the transfusion hole 20 of the first sealing element 2. Wherein, still be provided with on the jar body 1 with respectively with the intake pipe 7 and outlet duct 8 of inner chamber 10 intercommunication, intake pipe 7 and outlet duct 8 are used for being connected with the breathing pipeline respectively.

As an embodiment of the utility model, the humidification tank further comprises:

a rear cover 4 which covers the tank body 1 to close the inner cavity 10;

And the sealing ring 5 is arranged between the rear cover 4 and the tank body 1 and is used for sealing a gap between the rear cover 4 and the tank body 1.

In this embodiment, the inner cavity 10 of the tank body 1 is closed by the rear cover 4, and the rear cover 4 and the tank body 1 can be disassembled and assembled, so that the floating ball assembly 3 can be conveniently installed in the inner cavity 10. The gap between the rear cover 4 and the tank body 1 is sealed by the sealing ring 5, so that the sealing performance of the inner cavity 10 is better, and liquid leakage is prevented.

As an embodiment of the utility model, the liquid inlet pipe 11 and the tank body 1 are integrally formed, so that the processing is convenient.

Referring to fig. 7 and 8 in combination, as an embodiment of the present utility model, the first sealing member 2 is provided with a first end surface 21, the infusion hole 20 passes through the first end surface 21, the second sealing member 32 is provided with a second end surface 321 matched with the first end surface 21, the second end surface 321 can be closely contacted with the first end surface 21 to seal the infusion hole 20, and the second end surface 321 can be separated from the first end surface 21 to open the infusion hole 20.

In this embodiment, when the floating ball assembly 3 floats upwards under the action of the buoyancy force, the floating ball main body 31 drives the second sealing element 32 to move towards the first sealing element 2, so that the second end surface 321 on the second sealing element 32 is tightly attached to the first end surface 21 of the first sealing element 2, and at this time, the second end surface 321 on the second sealing element 32 realizes the blocking of the infusion hole 20, thereby preventing the liquid from entering the tank body 1 from the infusion hole 20; when the liquid level in the tank body 1 is lower than the set height, the liquid level is lowered, the buoyancy is reduced, the floating ball assembly 3 is lowered, and the floating ball main body 31 and the second sealing element 32 move away from the first sealing element 2, so that the second end face 321 on the second sealing element 32 is separated from the first end face 21 of the first sealing element 2, and the infusion hole 20 is opened to continuously convey liquid into the tank body 1 through the infusion hole 20.

In this embodiment, the first sealing element 2 and the second sealing element 32 are in contact with each other by using the first end surface 21 and the second end surface 321 to realize water shutoff, and the sealing is realized by using plane contact, so that the contact area between the first sealing element 2 and the second sealing element 32 is increased, and the water shutoff effect can be further improved; moreover, because the first sealing element 2 and the second sealing element 32 can be independently processed and molded, the flatness of the first end face 21 and the second end face 321 can be well ensured, and the first end face 21 and the second end face 321 are well attached, so that a good waterproof function can be realized, water shutoff is realized by utilizing plane contact fit, repeated working abrasion between the first sealing element 2 and the second sealing element 32 is small, and the service lives of the first sealing element 2 and the second sealing element 32 are prolonged.

As an embodiment of the present utility model, the first sealing member 2 is sleeved and fixed on the liquid inlet pipe 11, and the first sealing member 2 wraps the end of the liquid inlet pipe 11 near the inner cavity 10.

In this embodiment, the first sealing member 2 is fixed on the liquid inlet tube 11 in a sleeved mode, so that the installation of the first sealing member 2 is facilitated, and the end of the liquid inlet tube 11, which is close to the inner cavity 10, is wrapped by the first sealing member 2, so that the liquid in the liquid inlet tube 11 can only enter the inner cavity 10 from the infusion hole 20. After the first sealing element 2 is sleeved and fixed on the liquid inlet pipe 11, the liquid inlet pipe 11 is communicated with the transfusion hole 20, so that liquid entering through the liquid inlet pipe 11 can enter into the transfusion hole 20.

As one embodiment of the utility model, the first sealing element 2 is provided with a positioning counter bore 22 matched with the liquid inlet pipe 11, the positioning counter bore 22 is communicated with the transfusion hole 20, and the first sealing element 2 is sleeved and fixed on the liquid inlet pipe 11 through the positioning counter bore 22.

In this embodiment, the positioning counterbore 22 is adapted to the outer diameter of the inlet pipe 11. When the first sealing element 2 is installed on the tank body 1, the positioning counter bore 22 forms interference fit with the liquid inlet pipe 11, so that the first sealing element 2 is stably fixed on the liquid inlet pipe 11.

As an embodiment of the present utility model, the float body 31 includes a float upper cover 311 and a float lower cover 312 that are covered with each other, and the second seal 32 is fixed to the float upper cover 311.

In this embodiment, the floating ball body 31 includes the upper cover 311 and the lower cover 312, which are covered with each other, so that the floating ball body 31 can be assembled conveniently, and other components inside the floating ball body 31 can be mounted conveniently.

As an embodiment of the present utility model, a limiting cavity 12 coaxially arranged with the liquid inlet pipe 11 is further arranged in the tank 1, the floating ball main body 31 is provided with a guiding portion 310 matched with the limiting cavity 12, the second sealing member 32 is connected with the guiding portion 310, the second sealing member 32 and the guiding portion 310 are movably arranged in the limiting cavity 12, and a liquid passing gap 6 is formed between the guiding portion 310 and the inner wall of the limiting cavity 12.

In this embodiment, the guide portion 310 is specifically integrally formed on the floating ball upper cover 311. Wherein the guiding portion 310 is at least partially disposed in the limiting cavity 12 and forms a clearance fit with an inner wall of the limiting cavity 12. Through setting up spacing cavity 12 in jar body 1 to set up at floater main part 31 one end with spacing cavity 12 complex guide part 310, utilize guide part 310 to form clearance fit with spacing cavity 12, spacing cavity 12 plays spacing effect to guide part 310, makes guide part 310 can only reciprocate along spacing cavity 12, thereby plays spacing and direction effect to floater subassembly 3, makes floater subassembly 3 stably reciprocate. When the infusion hole 20 of the first sealing member 2 is plugged by the second sealing member 32, the liquid in the infusion hole 20 cannot enter the liquid passing gap 6, so that the liquid cannot enter the inner cavity 10; when the infusion hole 20 of the first sealing member 2 is opened, the liquid in the infusion hole 20 can enter the liquid passing gap 6, and thus enter the inner cavity 10.

Referring to fig. 9 in combination, as an embodiment of the present utility model, a plurality of positioning grooves 22 are circumferentially distributed on the outer peripheral surface of the first sealing member 2, and a plurality of positioning ribs 121 corresponding to the plurality of positioning grooves 22 one by one are disposed on the inner wall of the limiting cavity 12, and each positioning rib 121 is respectively clamped into the corresponding positioning groove 22.

In this embodiment, the plurality of positioning grooves 22 are longitudinally distributed on the outer peripheral surface of the first sealing element 2, the plurality of positioning ribs 121 are longitudinally distributed on the inner wall of the limiting cavity 12, and the positioning ribs 121 are matched with the positioning grooves 22 to realize the limiting of the first sealing element 2, prevent the first sealing element 2 from rotating, and enable the first sealing element 2 to be stably installed. The specific number of the positioning ribs 121 and the positioning grooves 22 is not limited, and the number of the positioning ribs 121 shown in fig. 6 is 6, and the number of the positioning grooves 22 on the first sealing member 2 is also 6.

As an embodiment of the present utility model, the guide portion 310 is hollow, the floating ball body 31 further includes a fixing column 313 disposed inside the guide portion 310 and coaxially disposed with the guide portion 310, the fixing column 313 and the guide portion 310 enclose a mounting groove 314, and the second sealing member 32 is disposed in the mounting groove 314 and is sleeved on the fixing column 313.

In this embodiment, the guiding portion 310 plays a part in wrapping the second sealing member 32, and the guiding portion 310 can protect the second sealing member 32, and the second sealing member 32 is matched with the mounting groove 314 and the fixing post 313, i.e. the second sealing member 32 is convenient to be fixedly mounted, and the second sealing member 32 can be stably mounted on the floating ball main body 31.

As an embodiment of the present utility model, the first sealing member 2 is made of silicone, and/or the second sealing member 32 is made of silicone. It will be appreciated that at least one of the first seal 2 and the second seal 32 is or both are of silicone material.

Preferably, the first sealing member 2 and the second sealing member 32 are made of silica gel, and the silica gel has good elasticity, so that the first sealing member 2 and the second sealing member 32 can be in closer contact, and better waterproof performance is realized. In addition, the first seal member 2 and the second seal member 32 may be made of rubber or plastic.

The embodiment of the utility model also provides a respiratory treatment device, which comprises the humidification tank of the embodiment, and the respiratory treatment device comprises all technical features and effects of the humidification tank, and are not repeated here.

According to the humidifying tank provided by the embodiment of the utility model, the first sealing element 2 is arranged, the transfusion hole 20 is arranged on the first sealing element 2, the first sealing element 2 is arranged on the liquid inlet pipe 11 on the tank body 1, the second sealing element 32 is arranged on the floating ball component 3, and when the liquid in the tank body 1 exceeds the preset height, the floating ball component 3 floats upwards and drives the second sealing element 32 to contact with the first sealing element 2 so as to realize the blocking of the transfusion hole 20; when the liquid level in the tank body 1 drops, the floating ball assembly 3 descends and drives the second sealing element 32 to be separated from the first sealing element 2, so that the infusion hole 20 is opened. Because the transfusion hole 20 is arranged on the first sealing element 2, but not on the tank body 1, the liquid inlet pipe 11 does not need to be provided with the transfusion hole 20 with a small diameter, the die structure for processing the tank body 1 is simplified, the forming processing of the tank body 1 is facilitated, the production difficulty and cost of the humidifying tank are reduced, the production yield of the humidifying tank is improved, and because the first sealing element 2 is independently processed and molded, the transfusion hole 20 is not easy to be blocked or has a flash phenomenon, the smooth liquid inlet and outlet of the transfusion hole 20 is ensured, and the second sealing element 32 is contacted with the first sealing element 2 to block the transfusion hole 20, so that the water blocking reliability of the humidifying tank is greatly improved.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (10)

1. A humidification tank, comprising:

The tank body is provided with an inner cavity and is provided with a liquid inlet pipe communicated with the inner cavity;

The first sealing piece is arranged at one end of the liquid inlet pipe, which is close to the inner cavity, and is provided with an infusion hole which is communicated with the inner cavity and the liquid inlet pipe; and

The floating ball assembly is movably arranged in the inner cavity and comprises a floating ball main body and a second sealing element which is fixed on the floating ball main body and matched with the first sealing element, the floating ball main body can float upwards and drive the second sealing element to be contacted with the first sealing element so as to seal the infusion hole, and the floating ball main body can sink and drive the second sealing element to be separated from the first sealing element so as to open the infusion hole.

2. The humidification tank of claim 1, wherein the first seal is provided with a first end face through which the infusion orifice passes, the second seal is provided with a second end face that mates with the first end face, the second end face is in close contact with the first end face to block the infusion orifice, and the second end face is separable from the first end face to open the infusion orifice.

3. The humidification tank of claim 1, wherein the first seal is secured to the inlet tube in a socket joint and the first seal wraps an end of the inlet tube proximate the lumen.

4. A humidification tank as claimed in claim 3, wherein the first seal member is provided with a locating counter bore which is matched with the liquid inlet pipe, the locating counter bore is communicated with the transfusion hole, and the first seal member is sleeved and fixed on the liquid inlet pipe through the locating counter bore.

5. The humidifying tank according to claim 1, wherein a limiting cavity coaxially arranged with the liquid inlet pipe is further arranged in the tank body, the floating ball body is provided with a guiding portion matched with the limiting cavity, the second sealing element is connected with the guiding portion, the second sealing element and the guiding portion are movably arranged in the limiting cavity, and a liquid passing gap is formed between the guiding portion and the inner wall of the limiting cavity.

6. The humidification tank of claim 5, wherein the guide portion is hollow, the float body further comprises a fixing post disposed inside the guide portion and coaxially disposed with the guide portion, the fixing post and the guide portion enclose a mounting groove, and the second sealing member is disposed in the mounting groove and is sleeved on the fixing post.

7. The humidifying tank according to claim 5, wherein a plurality of positioning grooves are circumferentially distributed at intervals on the outer peripheral surface of the first sealing member, a plurality of positioning ribs which are in one-to-one correspondence fit with the positioning grooves are arranged on the inner wall of the limiting cavity, and each positioning rib is respectively clamped into the corresponding positioning groove.

8. Humidification tank as claimed in claim 1, characterized in that the first seal is of silicone material and/or the second seal is of silicone material.

9. The humidification tank of claim 1, the humidifying tank is characterized by further comprising:

a rear cover which is covered with the tank body to close the inner cavity; and

And the sealing ring is arranged between the rear cover and the tank body and is used for sealing a gap between the rear cover and the tank body.

10. Respiratory treatment apparatus comprising a humidification tank according to any one of claims 1 to 9.