A humidifying device with water level detection and a ventilator

Abstract

The present invention provides a humidifying device with water level detection and a ventilator. Among them, the device includes a humidifying component and a differential pressure component inserted into the humidifying component; the humidifying component includes a humidifying tank and a control host connected to the bottom of the humidifying tank; an air inlet and an air outlet are provided through the top of the humidifying tank; a water inlet and a mounting hole for inserting the differential pressure component are also provided through the top of the humidifying tank; the differential pressure component includes a cavity and a partition plate, and the partition plate completely separates the cavity into two accommodating cavity units, and each accommodating cavity unit is also communicated with the pressure acquisition port of the corresponding differential pressure sensor; each accommodating cavity unit is also provided with a corresponding first pressure acquisition tube and a second pressure acquisition tube, the first pressure acquisition tube is inserted below the liquid level in the humidifying tank, the second pressure acquisition tube is inserted above the liquid level in the humidifying tank, and the differential pressure sensor is also connected to the control host. The aim is to improve the effectiveness of dry burning warning of the humidifying device.

Description

Technical Field

[0001] The present invention relates to the technical field of ventilators, and particularly to a humidifying device with water level detection and a ventilator. Background Art

[0002] Currently, the humidifying water box for a ventilator is an important part of the ventilator, and its function is to heat and humidify the inhaled gas. Good heating and humidification can prevent and reduce secondary respiratory tract infections in mechanically ventilated patients, as well as the stimulation to the cardiopulmonary system, and keep the alveoli moist. At the same time, it can also reduce the consumption of heat and respiratory tract moisture, making it difficult for phlegm crusts to form in the airway, and can reduce the viscosity of secretions and promote expectoration. However, the existing humidifying water box assembly of the ventilator does not have a corresponding water level detection structure. For example, Figure 1 As shown in an existing household humidifying device, after the humidifying tank 11 is combined with the bottom heating plate 12, it can be used to hold pure water. The bottom humidifying device main unit 13 heats the pure water in the humidifying tank 11 through the bottom heating plate 12. The gas of the ventilator enters the humidifying tank 11 from the air inlet 111 on the humidifying tank 11, mixes with the water vapor transpiring above the hot water, so that the gas is fully humidified. The humidified gas then exits through the air outlet 112 on the humidifying tank 11, is connected to the breathing pipeline, and finally enters the human respiratory system. When the water is consumed, medical staff connect the water supply pipeline at the interface 113 on the humidifying tank 11, and then replenish water to the humidifying tank 11 in the way of intravenous injection. After the water replenishment is completed, the water replenishing device is manually closed. Although it is possible to achieve early warning by detecting the temperature of the heating bottom plate 12, that is, when the detected temperature of the heating bottom plate 12 exceeds the threshold value, the central processing unit of the main unit believes that the water inside the humidifying tank 11 has been consumed at this time, so that the temperature of the heating plate continues to rise, and then the dry burning early warning is started. However, this type of early warning method has certain misjudgments. The room temperature and the scaling of the heating plate have a greater impact on the temperature of the heating plate, and the common heating methods such as PTC also have a greater impact on the temperature, resulting in the occurrence of mis-early warning or missed early warning from time to time. Therefore, there is an urgent need to propose a humidifying device that can effectively achieve dry burning early warning. Summary of the Invention

[0003] The main purpose of the present invention is to propose a humidifying device and a ventilator, aiming to solve the problem of inaccurate dry burning early warning detection of the existing humidifying water device.

[0004] To achieve the above purpose, the present invention provides a humidifying device with water level detection, and the device includes a humidifying component and a differential pressure component inserted into the humidifying component;

[0005] The humidifying component includes a humidifying tank and a control host connected to the bottom of the humidifying tank;

[0006] The top of the humidifying tank is provided with an air inlet for communicating with the intake pipe and an air outlet for communicating with the outlet pipe. The intake pipe and the outlet pipe are respectively connected to an external ventilator.

[0007] The top of the humidifying tank is also provided with a water inlet and a mounting hole for inserting the differential pressure assembly.

[0008] The differential pressure assembly includes a cavity and a partition plate. The partition plate completely separates the cavity into two accommodation cavity units, and each accommodation cavity unit is also communicated with the pressure acquisition port of the corresponding differential pressure sensor.

[0009] Each accommodation cavity unit is also provided with a corresponding first pressure acquisition pipe and a second pressure acquisition pipe. The first pressure acquisition pipe is inserted below the liquid level in the humidifying tank, and the second pressure acquisition pipe is inserted above the liquid level in the humidifying tank. The differential pressure sensor is also connected to the control host.

[0010] Optionally, the lower pipe orifice of the first pressure acquisition pipe is of a wedge-shaped structure.

[0011] Optionally, a heating bottom plate is further provided at the bottom of the humidifying tank, and the heating bottom plate is controlled to start by the control host.

[0012] Optionally, the lower pipe orifice of the first pressure acquisition pipe is spaced 2-5 mm from the heating bottom plate.

[0013] Optionally, the differential pressure assembly is closely attached to the mounting hole through the skirt portion on the lower side.

[0014] Optionally, an annular sealing ring is further provided between the skirt portion and the mounting hole.

[0015] Optionally, a hose is also connected between each accommodation cavity unit and the corresponding acquisition port of the differential pressure sensor, and a cavity plugging end cover is further provided between each hose and the corresponding accommodation cavity unit.

[0016] Optionally, a flexible film is provided on one side of each accommodation cavity unit close to the corresponding cavity plugging end cover.

[0017] Optionally, the differential pressure sensor is connected to the control host through a data cable.

[0018] To achieve the above object, the present invention also provides a ventilator, which includes the humidifying device with water level detection described in any one of the above.

[0019] Beneficial effects:

[0020] 1. By arranging corresponding pressure collection tubes above and below the liquid level and connecting them to different collection ports of the differential pressure sensor, two different pressure spaces are formed, and the change in the water level in the humidification tank is determined by the change in the pressure difference, thereby realizing the early warning of the water level in the humidification tank and determining the remaining water volume in the humidification tank.

[0021] 2. The differential pressure component adopts an integrated two-chamber design. While realizing pressure transmission by adding a flexible film, it also plays a protective role for the differential pressure sensor.

[0022] 3. The end of the pressure collection tube extending below the liquid level adopts a wedge-shaped structure, which can effectively avoid the influence of the siphon effect.

[0023] 4. The matching setting of the seal effectively enhances the sealing performance between the humidification component and the differential pressure component, thereby improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0025] Figure 1 FIG. 18 is a schematic structural diagram of a ventilator humidification device in the prior art;

[0026] Figure 2 FIG. 22 is a schematic structural diagram of a humidification device with water level detection according to an embodiment of the present invention;

[0027] Figure 3 For Figure 2 the installation sectional view of the structure shown;

[0028] Figure 4 For Figure 2 the schematic structural diagram of the humidification component shown;

[0029] Figure 5 For Figure 2 the schematic structural diagram of the differential pressure component shown;

[0030] Figure 6 FIG. 44 is a diagram of the differential pressure change during a certain test cycle according to an embodiment of the present invention.

[0031] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings.

[0032] Explanation of the reference numerals in the drawings:

[0033]

[0034] Detailed implementation manners

[0035] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0038] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0039] See Figure 2-5 , a structural schematic diagram of an embodiment of a humidifying device with water level detection provided by the present invention is shown. As shown in Figure 2-3 , the device includes a humidifying component 3 and a differential pressure component 2 inserted into the humidifying component 3;

[0040] As shown in Figure 4 , the humidifying component 3 includes a humidifying tank 31 and a control host 33 connected to the bottom of the humidifying tank 31. Among them, a heating bottom plate 32 is provided at the bottom of the humidifying tank 31, and the heating bottom plate 32 is controlled to start by the control host 33.

[0041] At the same time, an air inlet for communicating with the intake pipe 311 and an air outlet for communicating with the outlet pipe 312 are provided through the top of the humidifying tank 31. The intake pipe 311 and the outlet pipe 312 are respectively connected to an external ventilator, so as to humidify the gas flowing in the ventilator.

[0042] Further, a water inlet 313 and a mounting hole 314 for inserting the differential pressure assembly 2 are also provided through the top of the humidifying tank 31. The water inlet 313 is used to supplement the water volume in the humidifying tank 31, and the mounting hole 314 facilitates inserting the humidifying assembly 3 into the humidifying tank 31 when starting the humidifying device. Generally, the skirt portion 214 below the differential pressure assembly 2 is closely attached to the mounting hole 314. Preferably, an annular sealing ring 3141 is also provided between the skirt portion 214 and the mounting hole 314, thereby effectively improving the sealing effect at the connection between the humidifying assembly 3 and the differential pressure assembly 2.

[0043] Further, as Figure 3 、 Figure 5 shown, the differential pressure assembly 2 includes a cavity 21 and a partition plate 212. The partition plate 212 completely separates the cavity 21 into two accommodation cavity units, and each accommodation cavity unit is also communicated with the pressure acquisition port of the corresponding differential pressure sensor 24; and each accommodation cavity unit is also provided with a corresponding first pressure acquisition tube 211 and a second pressure acquisition tube 213. The first pressure acquisition tube 211 is inserted below the liquid level in the humidifying tank 31, and the second pressure acquisition tube 213 is inserted above the liquid level in the humidifying tank 31. The differential pressure sensor 24 is also connected to the control host 33. Through the connection of one end of the first pressure acquisition tube 211 and the second pressure acquisition tube 213 with the upper and lower sides of the liquid level in the humidifying tank 31 and the other end with the corresponding acquisition port of the differential pressure sensor 24, the pressure in different acquisition tubes in the water box is transmitted to the differential pressure sensor, realizing pressure acquisition. And the differential pressure sensor 24 is also connected to the control host 33, thereby realizing the real-time transmission of pressure data to the control host 33 to realize the further regulation of the control host 33.

[0044] Further, as Figure 5 shown, the lower pipe orifice 2111 of the first pressure acquisition tube 211 is of a wedge-shaped structure. The improvement principle is that if the lower pipe orifice 2111 of the first pressure acquisition tube 211 is flat, it is easy for the water column in the first pressure acquisition tube 211 to be sucked by the retention force and siphon. By using a wedge-shaped port, the balance state of the water itself can be destroyed after dry burning, and then the water column drops under the action of gravity, thereby realizing the balance of pressures at both ends and causing a sudden change in differential pressure. Further, it realizes reminding relevant personnel to add water to the humidifying tank 31.

[0045] Further, the lower pipe orifice 2111 of the first pressure acquisition tube 211 is spaced from the heating bottom plate 32 by a certain distance. Generally, the preset distance is set to 2 - 5 mm, and corresponding adjustment can be made according to actual needs..

[0046] Furthermore, a flexible hose 23 is connected between each accommodation cavity unit and the corresponding acquisition port of the differential pressure sensor 24, and an accommodation cavity sealing end cap 22 is further arranged between each flexible hose 23 and the corresponding accommodation cavity unit. Specifically, one end of each flexible hose 23 is connected to the corresponding pressure acquisition port, and the other end of each flexible hose 23 is connected to the interface of the corresponding accommodation cavity sealing end cap 22. Moreover, each accommodation cavity unit, the accommodation cavity sealing end cap 22, and the flexible hose 23 are integrated together and arranged in line symmetry.

[0047] Furthermore, a flexible film 4 is arranged on one side of each accommodation cavity unit close to the corresponding accommodation cavity sealing end cap 22. The arrangement of the flexible film 4 realizes the indirect transmission of the pressures in different collection tubes in the humidifying tank 31 to the differential pressure sensor, and while realizing the indirect pressure acquisition, it can also protect the sensor from water ingress and failure.

[0048] Furthermore, the differential pressure sensor 24 is connected to the control host 33 through a data line 25. Specifically, a corresponding signal line interface 331 is arranged on the side of the control host 33, which facilitates the connection of the data line 25. Then, according to the pressure values in different collection tubes received by the differential pressure sensor, the differential pressure situation in the humidifying tank 31 is determined, and when the differential pressure is 0, the control host will issue a corresponding warning reminder.

[0049] Furthermore, after the water is consumed, relevant personnel connect a water delivery pipeline to the water inlet 313 of the humidifying tank 31, and then replenish water to the humidifying tank 31 in the way of intravenous injection. After the water replenishment is completed, the water replenishing device is manually closed.

[0050] To achieve the above object, the present invention further provides a ventilator, and the ventilator includes the humidifying device with water level detection described in any one of the above.

[0051] Furthermore, to better illustrate the effect of the present device, the following is achieved through specific acquisition data:

[0052] Such as Figure 6As shown, it is the measured differential pressure trend chart of the humidification device of the present invention. The abscissa represents time, with the unit of s, and the ordinate represents the differential pressure collected by the differential pressure sensor, with the unit of Pa. Within 0 - 2029 s, the current water level is in the state where the water level is lower than the lower pipe orifice 2111, so the differential pressure is always zero. Starting from the 2029th second, external water replenishment is carried out in the humidification tank 31, making the water level exceed the lower pipe orifice 2111 of the collection pipe 211, so the differential pressure begins to decrease. At the 2291st second, the water replenishment ends, and the differential pressure reaches -300 Pa. As the ventilator continues to operate, the differential pressure continues to drop and finally reaches the minimum value of -372 Pa. This is because the water temperature starts to rise from room temperature, water vapor is generated, and the temperature of the enclosed gas in the collection pipe 211 rises, causing the gas to expand, further increasing the pressure in the collection pipe 211. While the pressure in the humidification tank 31 remains constant under the condition of constant ventilator flow rate, so the differential pressure will drop at the beginning. As the water volume is continuously consumed, the supporting force of the water on the water column in the collection pipe 211 decreases, so the liquid level of the collection pipe 211 drops, the volume of the enclosed gas in the collection pipe 211 increases, the pressure drops, and the differential pressure increases. At the 8241st second, the differential pressure rises to the maximum value of 52 Pa. When the water level is lower than the lower pipe orifice 2111 of the collection pipe 211, the water column in the collection pipe 211 will drop instantly, making the collection pipe 211 communicate with the inside of the humidification tank 11. And based on the wedge-shaped design of the lower pipe orifice 2111 of the collection pipe 211, when the water column drops, the pressures of the space units on both sides of the cavity 21 are equal after being indirectly transmitted through the flexible film 4, and the pressures collected at both ends of the differential pressure sensor 24 are equal, so that when the water level is lower than the lower pipe orifice 2111, the differential pressure drops to near zero. At this time, the control host will issue a dry burning alarm instruction. After the dry burning alarm, the differential pressure will always tend to zero and will no longer change.

[0053] And when the differential pressure reaches the lowest point of -372 Pa, the entire differential pressure change shows a linear distribution. Through actual measurement, the distance between the current water level in the humidification tank 31 and the lower pipe orifice 2111 is the absolute value of the current differential pressure value. For example, if the current differential pressure is -250 Pa, then the current water level distance is 25 mm, that is, the differential pressure is 2.5 cmH2O. Therefore, the current waveform can also predict the remaining water volume in the humidification tank.

[0054] It should be noted that in this article, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or system. Without further limitations, an element defined by the statement "including one..." does not exclude the existence of other identical elements in the process, method, article or system including that element. The serial numbers of the embodiments of the present invention above are only for description and do not represent the superiority or inferiority of the embodiments.

[0055] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present invention.

Claims

1. A humidifying device with water level detection, characterized in that, The device includes a humidification component (3) and a differential pressure component (2) inserted into the humidification component (3); The humidification component (3) includes a humidification tank (31) and a control host (33) connected to the bottom of the humidification tank (31); The top of the humidification tank (31) is provided with an air inlet for communicating with an air inlet pipe (311) and an air outlet for communicating with an air outlet pipe (312) in a penetrating manner. The air inlet pipe (311) and the air outlet pipe (312) are respectively connected to an external ventilator; The top of the humidification tank (31) is also provided with a water inlet (313) and a mounting hole (314) for inserting the differential pressure component (2) in a penetrating manner; The differential pressure component (2) includes a cavity (21) and a partition plate (212). The partition plate (212) completely divides the cavity (21) into two accommodation cavity units, and each accommodation cavity unit is also communicated with the pressure acquisition port of a corresponding differential pressure sensor (24); Each accommodation cavity unit is also provided with a corresponding first pressure acquisition pipe (211) and a second pressure acquisition pipe (213). The first pressure acquisition pipe (211) is inserted below the liquid level in the humidification tank (31), and the second pressure acquisition pipe (213) is inserted above the liquid level in the humidification tank (31). The differential pressure sensor (24) is also connected to the control host (33).

2. The humidifying device with water level detection according to claim 1, wherein, The lower pipe orifice (2111) of the first pressure acquisition pipe (211) is of a wedge-shaped structure.

3. The humidifying device with water level detection according to claim 1, characterized in that, A heating bottom plate (32) is further provided at the bottom of the humidification tank (31), and the heating bottom plate (32) is controlled to start by the control host (33).

4. The humidifying device with water level detection according to claim 1, wherein The lower pipe orifice (2111) of the first pressure acquisition pipe (211) is spaced 2 to 5 mm from the heating bottom plate (32).

5. The humidifying device with water level detection according to any one of claims 1 to 4, characterized in that The differential pressure component (2) is in close fit with the mounting hole (314) through the skirt part (214) on the lower side.

6. The humidifying device with water level detection according to claim 5, characterized in that, An annular sealing ring (3141) is further provided between the skirt part (214) and the mounting hole (314).

7. The humidifying device with water level detection according to claim 5, characterized in that, A hose (23) is also connected between each accommodation cavity unit and the corresponding acquisition port of the differential pressure sensor (24), and a cavity sealing end cover (22) is also provided between each hose (23) and the corresponding accommodation cavity unit.

8. The humidifying device with water level detection according to claim 6, wherein, A flexible film is provided on one side of each accommodation cavity unit close to the corresponding cavity sealing end cover (22).

9. The humidifying device with water level detection according to any one of claims 6 to 8, characterized in that, The differential pressure sensor (24) is connected to the control host (33) through a data line (25).

10. A ventilator, characterized in that, The ventilator includes the humidification device with water level detection according to any one of claims 1 to 9.

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