Anti-backflow water tank

Abstract

The invention relates to the technical field of breathing equipment, in particular to an anti-backflow water tank. The anti-backflow water tank comprises a water tank body, a water tank upper cover and a water tank partition plate. A water tank upper cover is arranged at the opening end of the water tank body, and a water tank partition plate is arranged in the water tank body to divide the water tank body into a water storage area and a heating area. A heating conductor is arranged on a bottom plate of the water tank body in the heating area, and an air inlet and an air outlet are formed in a side plate; a first communicating pipe and a second communicating pipe penetrate through the water tank partition plate and are used for communicating the water storage area with the heating area; the first communicating pipe is positioned above the second communicating pipe; the opening end, in the liquid storage area, of the first communicating pipe is close to a side plate, opposite to the water tank partition plate, of the water tank body. The opening end, in the liquid storage area, of the second communicating pipe is close to a side plate, opposite to the water tank partition plate, of the water tank body. The communicating pipe extends, and when the machine accidentally turns on one side, the opening end of the communicating pipe is exposed out of the liquid level to prevent liquid in the liquid storage area from leaking.

Description

Technical Field

[0001] The invention relates to the technical field of respiratory equipment, in particular to an anti-reflux water tank. Background Art

[0002] Ventilators are widely used to treat conditions such as respiratory failure and sleep apnea-hypopnea syndrome. Using a ventilator directly in dry environments can dry out the user's nasal cavity and cause other discomfort. Therefore, ventilators are often equipped with a humidifier. This function primarily heats the liquid in the humidifier's water tank, evaporating it and allowing the water vapor to mix with the air to meet humidity requirements.

[0003] Currently, common ventilator humidification is performed by heating the liquid in the entire water tank. When the user's humidification demand is relatively small, the liquid in the entire water tank still needs to be heated, which will cause unnecessary waste. When the water tank accidentally overturns, there is a risk that all the liquid in the water tank may accidentally leak out, causing damage to the machine. Since there is a large air path inside the water tank, the volume of the water tank is generally large, which is not conducive to users carrying. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the existing technology and propose an anti-backflow water tank. The present invention divides the water tank into a heating area and a water storage area. Using the principle of communicating vessels and the siphon phenomenon, a connecting pipe is set up to continuously replenish water from the water storage area to the heating area. The heating area heats the liquid through the heat generated by the heating conductor. At this time, only part of the liquid needs to be heated to achieve the same humidification effect. At the same time, the connecting pipe is extended. When the machine accidentally overturns, the open end of the connecting pipe is exposed to the liquid surface to prevent the liquid in the liquid storage area from leaking. Only the liquid in the heating area is at risk of accidental leakage, which greatly reduces the risk of machine damage.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A backflow prevention water tank, comprising a water tank body, a water tank cover, and a water tank partition; the water tank cover is disposed on the open end of the water tank body, and the water tank partition is built into the water tank body to separate the water tank body into a water storage area and a heating area;

[0007] A heating conductor is provided on the bottom plate of the water tank body in the heating area, and an air inlet and an air outlet are provided on the side plate;

[0008] A first connecting pipe and a second connecting pipe are provided on the water tank partition to connect the water storage area and the heating area; the first connecting pipe is located above the second connecting pipe;

[0009] The opening end of the first communicating pipe in the liquid storage area is close to the side plate of the water tank body opposite to the water tank partition;

[0010] The opening end of the second communicating pipe in the liquid storage area is close to the side plate of the water tank body opposite to the water tank partition.

[0011] Preferably, the second connecting pipe is a connecting straight pipe or a siphon pipe;

[0012] The siphon tube includes a U-shaped part and a horizontal part. The U-shaped part is arranged across the water tank partition, and the horizontal part is arranged in the liquid storage area, and the open end of the horizontal part is close to the side plate of the water tank body opposite to the partition; the open end of the U-shaped part in the heating area is lower than the open end of the horizontal part.

[0013] Preferably, the water tank body is in the shape of a cuboid.

[0014] In the present invention, the volume of the heating area is smaller than the volume of the water storage area.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention divides the water tank into functional groups so that the humidification effect can be achieved by heating only part of the liquid, thereby avoiding energy waste caused by unnecessary liquid heating, and saving energy and being environmentally friendly.

[0017] 2. The present invention divides the water tank into a heating area and a water storage area, sets a connecting pipe between the two, and extends the connecting pipe in the water storage area, thereby fundamentally reducing the accidental leakage of liquid in the water storage area, preventing the liquid in the water storage area from flowing back into the respiratory airway, and reducing the risk of damage to the ventilator.

[0018] 3. The present invention sets the water storage area as a gas bypass, the heating area is smaller, and the area occupied by the gas path is greatly reduced compared with the common water tanks on the market, so the volume is more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an exploded schematic diagram of the water tank of the present invention;

[0020] Figure 2 It is a schematic diagram of the assembly of the water tank of the present invention;

[0021] Figure 3 is a cross-sectional view of a water tank of the present invention;

[0022] Figure 4-11 It is a diagram of the use state of the water tank of the present invention;

[0023] Figure 12 It is a schematic diagram of the rollover of the water tank of the present invention;

[0024] Figure 13 It is a schematic diagram of the situation in which bubbles exist in the water tank of the present invention;

[0025] Figure 14This is a diagram of the use state of the water tank of the present invention when bubbles exist;

[0026] Reference numerals:

[0027] 1. Water tank body; 2. Water tank cover; 3. Water tank partition; 4. Water storage area; 5. Heating area; 6. Heating conductor; 7. Air inlet; 8. Air outlet; 9. First connecting pipe; 10. Second connecting pipe. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0029] Example 1

[0030] like Figure 1-3 As shown, an anti-backflow water tank comprises a water tank body 1, a water tank cover 2 and a water tank partition 3; the water tank cover 2 is provided on the open end of the water tank body 1, and the water tank partition 3 is built into the water tank body 1 to separate the water tank body 1 into a water storage area 4 and a heating area 5;

[0031] A heating conductor 6 is provided on the bottom plate of the water tank body 1 in the heating area 5, and an air inlet 7 and an air outlet 8 are provided on the side plate;

[0032] The water tank partition 3 is provided with a first connecting pipe 9 and a second connecting pipe 10 for connecting the water storage area and the heating area; the first connecting pipe 9 is located above the second connecting pipe 10;

[0033] The opening end of the first connecting pipe 9 in the liquid storage area 4 is close to the side plate of the water tank body opposite to the water tank partition 3;

[0034] The opening end of the second connecting pipe 10 in the liquid storage area 4 is close to the side plate of the water tank body opposite to the water tank partition 3.

[0035] The second connecting pipe 10 is a connecting straight pipe or a siphon pipe;

[0036] The siphon tube includes a U-shaped part and a horizontal part. The U-shaped part is arranged across the water tank partition, and the horizontal part is arranged in the liquid storage area, and the open end of the horizontal part is close to the side plate of the water tank body opposite to the partition; the open end of the U-shaped part in the heating area is lower than the open end of the horizontal part.

[0037] In the present invention, the water tank body is in the shape of a rectangular parallelepiped. The volume of the heating area is smaller than the volume of the water storage area.

[0038] In the present invention, the water tank body: one part is used for heating the liquid, and the other part is used for storing the liquid; the heating conductor: uses the eddy current phenomenon to generate heat, thereby directly heating the liquid; the water tank cover: is used to seal the entire water tank; the connecting pipe: is used to connect the heating part of the water tank with the water storage part; in the present invention, when the pressure of the ventilator changes, the first connecting pipe can connect the liquid on both sides when it is below the liquid surface and act as a connecting vessel, and when it is above the liquid surface, it can play the role of balancing the air pressure in the liquid storage area and the heating area.

[0039] Taking the second connecting pipe as a siphon pipe as an example, the use process of the anti-backflow water tank of the present invention is as follows:

[0040] like Figure 4 As shown, open the water tank cover and add water to the MAX line.

[0041] like Figure 5 As shown in the figure (the arrow indicates the direction of liquid flow), close the upper cover of the water tank. Since the connecting pipe connects the heating area and the water storage area of ​​the water tank body, the water tank becomes a communicating vessel and the liquid levels on both sides are at the same height.

[0042] like Figure 6 As shown, at this time, the heating conductor is energized to generate heat, heating the liquid in the heating area of ​​the water tank, thereby achieving a humidification effect.

[0043] like Figure 7-8 As shown, as the liquid is consumed, the liquid level gradually decreases; at this time, the first connecting tube is exposed to the liquid surface at the open end of the heating zone and is connected to the heating zone. When the first connecting tube is exposed to the liquid surface at the open end of the liquid storage zone, the heating zone and the liquid storage zone are connected, and the pressure in the cavity is the same.

[0044] like Figure 9 As shown, when the liquid level drops below the highest point of the second connecting pipe, the liquid is siphoned, causing the liquid in the liquid storage area of ​​the water tank body to continue to flow to the heating area.

[0045] like Figure 10 As shown in FIG, as heating continues, the liquid gradually decreases to a limit state, at which time the siphon effect reaches its limit and the siphon phenomenon disappears.

[0046] like Figure 11 As shown in the figure, as heating continues, the liquid gradually decreases, and the liquid in the storage area no longer supplies the heating area, resulting in uneven liquid levels on the left and right sides. The water tank can continue to be used until the liquid in the heating area is completely consumed and heating ends; at this time, liquid needs to be refilled into the water tank.

[0047] like Figure 12As shown, if the water tank accidentally tips over, the heating area is at the bottom and the water storage area is at the top. Because the openings of the first and second connecting tubes in the water storage area are close to the sidewall of the water tank body, they are exposed to the liquid surface during tipping, preventing liquid from leaking into the gas circuit. Only a small amount of liquid will leak from the heating area of ​​the water tank body, which will not affect the operation of the gas circuit.

[0048] like Figure 13 As shown in Figures a and b in the figure, when the water tank is in use, when liquid is added to the water tank, bubbles may be present in the second connecting pipe.

[0049] like Figure 14 As shown in Figures af, the water tank of the present invention can still be used normally when there are bubbles in the second connecting pipe, specifically:

[0050] like Figure 14 As shown in Figure a (the arrow indicates the direction of liquid flow), when the water tank cover is closed, the connecting pipe connects the heating area and the water storage area of ​​the water tank body. At this time, the water tank becomes a communicating vessel, and the liquid levels on both sides are at the same height. At this time, the heating conductor is energized to generate heat, heating the liquid in the heating area of ​​the water tank, thereby achieving a humidification effect.

[0051] like Figure 14 As shown in Figure bf, as the liquid is consumed, the liquid level gradually decreases; when the liquid level drops below the highest point of the second connecting pipe, the liquid siphons, causing the liquid in the liquid storage area of ​​the water tank body to continue to flow to the heating area, and the bubbles are discharged from the second connecting pipe into the heating area along with the flow of the liquid.

[0052] When the second communicating pipe is a straight communicating pipe, the second communicating pipe is always used as a communicating vessel. This structure is simpler.

[0053] When heating the water tank of the present invention, only part of the liquid needs to be heated, and there is no need to heat the liquid in the entire water tank, which greatly reduces energy consumption; the internal air pressure of the water storage area and the heating area of ​​the water tank is the same, avoiding unnecessary energy loss due to liquid backflow on the left and right sides of the water tank in special mode.

[0054] The present invention achieves the purpose of humidification by heating part of the water; reduces the large amount of liquid leakage caused by accidental overturning of the machine; reduces the accidental energy consumption loss caused by the backflow of the water tank; the water tank has a simple shape and structure, and the connecting pipes are all detachable, which is convenient for patients to use and easy to clean and disinfect; the present invention divides the water tank into a heating area and a water storage area, and integrates the main air path of the water tank with the heating area, which greatly reduces the volume and is more convenient for users to carry.

[0055] Any content not described in detail in the present invention can be based on conventional technical knowledge in the art.

[0056] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions to the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and are intended to be encompassed by the claims of the present invention.

Claims

1. A backflow prevention tank, characterized in that: The anti-backflow water tank includes a water tank body, a water tank cover and a water tank partition; the water tank cover is provided on the open end of the water tank body, and the water tank partition is built into the water tank body to separate the water tank body into a water storage area and a heating area; A heating conductor is provided on the bottom plate of the water tank body in the heating area, and an air inlet and an air outlet are provided on the side plate; A first connecting pipe and a second connecting pipe are provided on the water tank partition to connect the water storage area and the heating area; the first connecting pipe is located above the second connecting pipe; The opening end of the first communicating pipe in the liquid storage area is close to the side plate of the water tank body opposite to the water tank partition; The opening end of the second communicating pipe in the liquid storage area is close to the side plate of the water tank body opposite to the water tank partition.

2. The anti-backflow water tank according to claim 1, characterized in that: The second connecting pipe is a connecting straight pipe or a siphon pipe; The siphon tube includes a U-shaped part and a horizontal part. The U-shaped part is arranged across the water tank partition, and the horizontal part is arranged in the liquid storage area, and the open end of the horizontal part is close to the side plate of the water tank body opposite to the partition; the open end of the U-shaped part in the heating area is lower than the open end of the horizontal part.

3. The anti-backflow water tank according to claim 1, characterized in that: The water tank body is in the shape of a rectangular parallelepiped.

4. The anti-backflow water tank according to claim 1, characterized in that: The volume of the heating area is smaller than the volume of the water storage area.

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