Liquid automatic supply cut-off device and supply cut-off method

Abstract

The present invention discloses an automatic liquid replenishment cut-off device, comprising a humidification tank, a heating component arranged at the bottom of the humidification tank, an external liquid replenishment component arranged on the humidification tank, and an air outlet pipe connected to the humidification tank, an internal liquid replenishment component arranged between the humidification tank and the air outlet pipe, the internal liquid replenishment component and the external liquid replenishment component being connected to a liquid coordination replenishment system, the liquid coordination replenishment system controlling the internal liquid replenishment component and the external liquid replenishment component to supply liquid to the humidification tank, the liquid coordination replenishment system comprising a tank body liquid quantity detection module, an external liquid replenishment control module, and an internal liquid replenishment control module; the tank body liquid quantity detection module is used to detect the liquid level height or the liquid quantity in the humidification tank in real time; the external liquid replenishment control module is used to control the liquid quantity of the external liquid input into the humidification tank; and the internal liquid replenishment control module is used to control the liquid quantity of the internal liquid input into the humidification tank. The invention solves the problem that the condensed water is not reasonably utilized when the humidifier automatically adds water.

Description

Technical Field

[0001] The present invention belongs to the technical field of automatic liquid replenishment for humidifiers, and in particular relates to an automatic liquid replenishment cut-off device and a replenishment cut-off method. Background Art

[0002] A humidifier is a crucial component of a ventilator system, used to warm and humidify the inhaled gas. Proper heating and humidification can prevent and reduce secondary respiratory infections and cardiopulmonary irritation in mechanically ventilated patients, maintaining alveolar moisturization. Currently, humidifiers on the market require manual refilling, which requires cutting off the air supply and disconnecting the ventilator from the humidifier, allowing the ventilator to be connected directly to the gas supply. Yang Zhen, Yang Kun, and others from the Medical Engineering Department of the 302nd Hospital of the People's Liberation Army have designed an automatic refill system for ventilator humidifiers. This system utilizes a liquid level sensor to monitor the liquid level and simultaneously controls the liquid level via an injection bottle. This system achieves automatic refill and shutoff of liquid through the combined control of the liquid level sensor and injection bottle. An analysis of existing technologies reveals the following main approaches: time-based shutoff, liquid level sensing, and weight sensing. During the actual use of the humidifier, condensation will be generated in the pipeline. In the existing technology, a water collection cup is often used to collect it, and the condensed water in the water collection cup is discharged. The reason is that it is believed that long-term retention of condensed water is prone to pathogenic bacteria parasitism. Since it is sterile water, it will not be unusable in a short time.

[0003] Chinese patent application publication number CN112755356A discloses a humidification device for a ventilator. This device discloses a technical solution for collecting condensed water in the pipeline. This solution involves vibrating the condensed water in the pipeline with a vibrator, causing it to move into the barrel. Chinese patent application publication number CN113304375A discloses a pipeline structure for treating condensed water. It introduces a condensed water recycling solution, namely, atomizing the collected condensed water directly in the pipeline to humidify the mixed gas. However, since this product cannot be recycled for a long time, its cost is too high. Chinese patent application publication number CN110652633A discloses a condensed water recovery device, disclosing the concept of recycling condensed water in the pipeline. The condensed water in the pipeline is returned to a water tank for reuse. However, because condensed water in the pipeline provides conditions for the growth of pathogens, the reuse of condensed water is rarely used in the prior art. In fact, there are many factors that can cause condensed water in the pipeline to be contaminated, but the main reason is the long residence time of the condensed water in the pipeline. Reasonable recycling of condensed water can reduce the impact of condensed water accumulation in the pipeline on gas transmission and breathing, and can also automatically replenish the humidification tank. Summary of the Invention

[0004] The object of the present invention is to provide a liquid automatic supply cut-off device and a supply cut-off method to solve the problem that the automatic water addition of the existing ventilator humidifier does not make reasonable use of the condensed water.

[0005] In order to achieve the purpose of the present invention, the present invention discloses an automatic liquid replenishment cut-off device, comprising a humidification tank, a heating component arranged at the bottom of the humidification tank, an external liquid replenishment component arranged on the humidification tank and an air outlet pipe connected to the humidification tank, an internal liquid replenishment component is arranged between the humidification tank and the air outlet pipe, the internal liquid replenishment component is arranged and connected to the external liquid replenishment component with a liquid coordination replenishment system, and the liquid coordination replenishment system controls the internal liquid replenishment component and the external liquid replenishment component to supply liquid to the humidification tank, the liquid coordination replenishment system comprises a tank body liquid quantity detection module, an external liquid replenishment control module and an internal liquid replenishment control module; the tank body liquid quantity detection module is used to detect the liquid level height in the humidification tank or the liquid quantity in the humidification tank in real time; the external liquid supply control module is used to control the liquid quantity of external liquid input into the humidification tank; the internal liquid replenishment control module is used to control the liquid quantity of internal liquid input into the humidification tank.

[0006] As a further improvement of the above technical solution:

[0007] The humidification tank includes a tank body, which is provided with an air inlet, an air outlet, and a liquid inlet. The air outlet is connected to the air outlet pipe, a plurality of water collecting bags are provided on the air outlet pipe, a reflux pipe is provided between the water collecting bags and the liquid inlet, the air inlet is connected to the air inlet pipe, a direct pipe is provided between the air inlet pipe and the air outlet pipe, a first heating component is provided at the bottom of the tank body, a second heating component is provided on the direct pipe, a first temperature sensor is provided at one end of the air outlet pipe close to the air outlet, a second temperature sensor is provided at the other end of the air outlet pipe, a first cut-off switch is provided on the air inlet, a second cut-off switch is provided at the air outlet, and a third cut-off switch is provided on the air outlet pipe.

[0008] The water collecting bag comprises a rotating ring body arranged on the air outlet pipe, wherein a guide groove is arranged in the rotating ring body, the guide groove is connected to a water outlet hole, the water outlet hole is connected to a conical water port, and a vibration motor is arranged on the rotating ring body.

[0009] A quality detection module is provided between the return pipe and the tapered water outlet. The quality detection module comprises a containing cylinder, a liquid detector provided on the containing cylinder, and a timer.

[0010] The reflux pipe is provided with a fourth cut-off switch, and one end of the reflux pipe is connected to a waste liquid tank.

[0011] The return pipe is provided with a pressure driver for generating negative pressure and positive pressure.

[0012] The present invention also discloses a method for automatically stopping the liquid supply, including the following steps:

[0013] S1. Obtain the liquid volume in the tank through the tank liquid volume detection module, and judge whether the liquid volume is within the standard;

[0014] S2. Detect whether the condensate meets the filling standard through the quality detection module,

[0015] S21. Record the time when the liquid first enters the receiving cylinder;

[0016] S22. When liquid needs to be replenished, obtain the residence time of the liquid in the receiving cylinder through the timer;

[0017] S23. Judge whether the residence time exceeds the threshold. If it exceeds, it is considered not to meet the standard; if it does not exceed, it is considered to meet the standard. If it meets the standard, it is filled into the tank; if it does not meet the standard, it is introduced into the waste liquid tank;

[0018] S3. The first temperature sensor detects the outlet temperature T1, and the second temperature sensor detects the temperature T2 of the outlet pipe. Compare T1 and T2 to predict the condensation state and predict the condensate content;

[0019] Obtain ΔT = T1 - T2, and compare ΔT with the K value,

[0020] If ΔT < K, it is considered that the probability of condensation is small and less condensate is generated;

[0021] If ΔT > K, it is considered that the probability of condensation is large and a certain amount of condensate will be generated;

[0022] If ΔT > 2K, it is considered that the probability of condensation is extremely large and a large amount of condensate is generated;

[0023] When ΔT > 2K appears, control the opening degree of the first cut-off switch so that part of the gas enters the outlet pipe from the direct connection pipe;

[0024] When ΔT > K occurs, judge whether the residence time of the liquid in the receiving cylinder is about to exceed the threshold. If it is about to exceed the threshold, open the fourth cut-off switch to let the liquid flow into the tank;

[0025] S4. After the condensate flows back to the tank, re-obtain the liquid volume in the tank and calculate the required liquid volume after supplementing the liquid;

[0026] S5. Supplement external liquid according to the required liquid volume to ensure the liquid volume in the tank;

[0027] S6. After the gas supply is completed, adjust the opening degrees of the first cut-off switch and the third cut-off switch so that the hot air flow enters the outlet pipe from the direct connection pipe and returns to the tank or the waste liquid tank until the liquid detector does not detect the liquid in the receiving cylinder, then the operation can be stopped.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The automatic liquid replenishment cut-off device of the present invention can effectively collect condensate by setting a rotating ring, preventing the condensate from being retained in the outlet pipe and affecting the outlet pipe; a heatable direct-connected pipe is set to adjust the temperature in the outlet pipe and control the condensation process of the condenser pipe. The temperature sensor set in the pipe can predict the probability of condensation and the amount of condensation. Through temperature sensing and temperature control, the prediction and management of condensation are completed. The quality detection is set to judge the quality of the condensate, and the timing scheme is used to manage the quality. It has low cost and simple structure, and does not affect the disposable use of medical equipment.

[0030] The automatic liquid replenishment cut-off method of the present invention predicts and controls pipeline condensation, and at the same time judges the quality of and recycles pipeline condensed water, thereby completing the collection of effective condensed water to a great extent, and at the same time effectively reducing the breeding of bacteria in the condensed liquid retained in the pipeline, thereby ensuring the automatic replenishment of the humidification tank and the rational use of the condensed water, and ensuring the normal use of the humidification tank and its pipeline to avoid bacterial invasion. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic diagram of the system structure of the liquid automatic supply and cut-off device according to Example 1 of the present invention;

[0032] Figure 2 This is a structural schematic diagram of the liquid automatic supply and cut-off device according to Example 1 of the present invention;

[0033] Figure 3 This is a structural diagram of a liquid automatic replenishment and cut-off device according to Example 2 of the present invention;

[0034] Figure 4 This is a structural diagram of a liquid automatic replenishment and cut-off device according to Example 3 of the present invention;

[0035] Figure 5 This is a schematic diagram of the arrangement structure of the rotating ring body in Example 3 of the present invention;

[0036] Figure 6 Schematic diagram of the internal structure of the rotating ring body in Example 3 of the present invention;

[0037] Figure 7 Schematic diagram of the gas-liquid flow in step S3 of the present invention;

[0038] Figure 8 Schematic diagram of the gas-liquid flow in step S6 of the present invention.

[0039] Figure markings: 1. Tank body; 10. Humidification tank; 11. Air inlet; 12. Air outlet; 13. Liquid inlet; 2. Air outlet pipe; 20. Internal liquid supply assembly; 21. Water collecting bag; 211. Rotating ring body; 212. Guide groove; 213. Conical water outlet; 214. Vibration motor; 22. Return pipe; 3. Air inlet pipe; 30. External liquid supply assembly; 4. Direct connection pipe; 51. First heating assembly; 52. Second heating assembly; 61. First temperature sensor; 62. Second temperature sensor; 71. First cut-off switch; 72. Second cut-off switch; 73. Third cut-off switch; 74. Fourth cut-off switch; 8. Waste liquid tank; 81. Holding cylinder; 82. Liquid detector; 83. Timer; 84. Pressure driver. DETAILED DESCRIPTION

[0040] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0041] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc., should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection or an indirect connection through an intermediate medium; it may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example 1

[0044] like Figure 1 and Figure 2As shown, the liquid automatic replenishment cut-off device of this embodiment includes a humidification tank 10, a heating component arranged at the bottom of the humidification tank 10, an external liquid replenishment component 30 arranged on the humidification tank 10 and an air outlet pipe 2 connected to the humidification tank 10, an internal liquid replenishment component 20 is arranged between the humidification tank 10 and the air outlet pipe 2, the internal liquid replenishment component 20 is arranged and connected to the external liquid replenishment component 30 with a liquid coordination replenishment system, and the liquid coordination replenishment system controls the internal liquid replenishment component 20 and the external liquid replenishment component 30 to supply liquid to the humidification tank 10, and the liquid coordination replenishment system includes a tank body liquid quantity detection module, an external liquid supply control module and an internal liquid supply control module; the tank body liquid quantity detection module is used to detect the liquid level height in the humidification tank 10 or the liquid quantity in the humidification tank 10 in real time; the external liquid supply control module is used to control the liquid quantity of the external liquid input into the humidification tank 10; the internal liquid supply control module is used to control the liquid quantity of the internal liquid input into the humidification tank 10. Example 2

[0045] like Figure 3 As shown, the humidification tank 10 of this embodiment includes a tank body 1, which is provided with an air inlet 11, an air outlet 12, and a liquid inlet 13. The air outlet 12 is connected to the air outlet pipe 2, and a plurality of water collecting bags 21 are provided on the air outlet pipe 2. A reflux pipe 22 is provided between the water collecting bag 21 and the liquid inlet 13. The air inlet 11 is connected to the air inlet pipe 3, and a direct-connecting pipe 4 is provided between the air inlet pipe 3 and the air outlet pipe 2. A first heating component 51 is provided at the bottom of the tank body 1, and a second heating component 52 is provided on the direct-connecting pipe 4. A first temperature sensor 61 is provided at one end of the air outlet pipe 2 near the air outlet 12, and a second temperature sensor 62 is provided at the other end of the air outlet pipe 2. The air inlet 11 is provided with a first cut-off switch 71, the air outlet 12 is provided with a second cut-off switch 72, and the air outlet pipe 2 is provided with a third cut-off switch 73. Example 3

[0046] like Figure 4-6 As shown, the water collection bag 21 of this embodiment includes a rotating ring body 211 arranged on the air outlet pipe 2, a guide groove 212 is arranged in the rotating ring body 211, the guide groove 212 is connected to the water outlet, the water outlet is connected to the conical water outlet 213, and a vibration motor 214 is arranged on the rotating ring body 211. A quality detection module is arranged between the return pipe 22 and the conical water outlet 213, and the quality detection module includes a holding tube 81, a liquid detector 82 arranged on the holding tube 81, and a timer 83. A fourth cut-off switch 74 is provided on the return pipe 22, and one end of the return pipe 22 is connected to the waste liquid tank 8. A pressure driver 84 is provided on the return pipe 22 for generating negative pressure and positive pressure. Example 4

[0047] This embodiment discloses a method for automatically replenishing and cutting off liquid, comprising the following steps:

[0048] S1. Obtain the liquid volume in the tank body 1 through the tank body liquid volume detection module, and determine whether the liquid volume is within the standard. This standard can be set according to the requirements of the humidifying tanks of each manufacturer. Different manufacturers have different water volume standards. When it reaches a certain value, the liquid needs to be replenished in a timely manner.

[0049] S2. Detect whether the condensate meets the filling standard through the quality detection module. Since condensate is prone to breeding bacteria, it needs to be measured to determine whether it meets the standard.

[0050] S21. Record the time when the liquid first enters the receiving cylinder 81. When the liquid enters the receiving cylinder 81, the timer 83 will record the entry time and will not reset the time due to continuous liquid entry.

[0051] S22. When the liquid needs to be replenished, obtain the residence time of the liquid in the receiving cylinder 81 through the timer 83. This time is the residence time of the liquid that first entered the receiving cylinder 81. If its time meets the standard, it is considered that the rest of the liquid also meets the standard.

[0052] S23. Judge whether the residence time exceeds the threshold. If it exceeds, it is considered not to meet the standard. If it does not exceed, it is considered to meet the standard. If it meets the standard, it is filled into the tank body 1. If it does not meet the standard, it is introduced into the waste liquid tank 8.

[0053] When the liquid is discharged, the next liquid entering the receiving cylinder 81 will activate the liquid detector 82 again and then activate the timer 83, causing it to reset and start timing again.

[0054] S3. The first temperature sensor 61 detects the temperature T1 at the air outlet 12, and the second temperature sensor 62 detects the temperature T2 of the air outlet pipe 2. Compare the magnitudes of T1 and T2 to predict the condensation state and predict the condensate content. Specifically:

[0055] Obtain ΔT = T1 - T2, and compare ΔT with the K value. ΔT is the condensation temperature difference and is the maximum temperature difference. Whether this temperature difference is the largest depends on the position of the second temperature sensor 62. To ensure the effect, it is set at the rear side of the water collection package 21 here to facilitate predicting the condensation situation. The K value here is the temperature difference at which condensation occurs. Usually, the temperature difference is 10°C. The K value here can be set according to experimental experience and is usually 5 - 10°C.

[0056] If ΔT < K, it is considered that the probability of condensation is small and less condensate is generated. Since this temperature difference is small, it can be determined that condensation basically does not occur. This situation can reduce the occurrence of condensation, which is beneficial for respiratory humidification. The working schematic diagram is as Figure 3 shown.

[0057] If ΔT>K, it is considered that the probability of condensation is high and a certain amount of condensed water will be produced. Since the pipe is not heated, this temperature difference occurs, resulting in condensation. It should be noted that when ΔT>K occurs, it will lead to the subsequent generation of a large amount of condensed water. It is necessary to determine whether the residence time of the liquid in the holding cylinder 81 is about to exceed the threshold. If it is about to exceed the threshold, since condensed water is stored in the holding cylinder 81 from the beginning, the condensed water stays in the cylinder for too long, which will cause bacteria to grow in the liquid and cause it to deteriorate. In order to prevent it from contaminating the pipe, it needs to be discharged. However, after it is discharged, the pipe is contaminated and the subsequent condensed water cannot be used. Therefore, when it is predicted that a large amount of condensed water is about to be produced, it is necessary to determine whether the liquid in the holding cylinder 81 is about to exceed the threshold. The threshold time can be defined as 4 hours. If it exceeds 3.5 hours, it is considered that the threshold is about to be exceeded. At this time, if a large amount of condensed water is produced, the fourth cut-off switch 74 is opened to pass the liquid into the tank body 1 to ensure the supply of internal circulation.

[0058] If ΔT>2K, it is considered that the probability of condensation is extremely high, and a large amount of condensed water is generated; the occurrence of this difference is usually caused by the outside temperature being too low, and condensation is very easy at this time. In order to alleviate condensation, the pipeline needs to be heated up. When ΔT>2K appears, the opening of the first cut-off switch 71 is controlled to allow part of the gas to enter the outlet pipe 2 from the direct-connected pipe 4; the direct-connected pipe 4 is heated by the second heating component 52, and after heating, it enters the outlet pipe 2, heating the outlet pipe 2, which can suppress condensation and increase the gas temperature to ensure the temperature of the gas inhaled into the human body. The gas-liquid flow diagram is shown as follows Figure 7 shown.

[0059] S4. After the condensate flows back to the tank body 1, the amount of liquid in the tank body 1 is obtained again, and the required amount of liquid after the liquid is replenished is calculated; this step is the same as the external liquid replenishment scheme in the prior art, and does not limit the specific external liquid scheme, and any external liquid replenishment can be achieved.

[0060] S5. Add external liquid according to the required amount of liquid to ensure the liquid level in the tank body 1.

[0061] S6. After the gas supply is completed, adjust the opening of the first cut-off switch 71 and the third cut-off switch 73 so that the hot air flow enters the outlet pipe 2 from the direct-connection pipe 4 and returns to the tank body 1 or the waste liquid tank 8 until the liquid detector 82 does not detect the liquid in the holding tube 81, and then stop working. After the gas supply is completed, the pipeline needs to be cleaned. No condensate can remain in the pipeline. That is, close the first cut-off switch 71 and the third cut-off switch 73, and pass the high-temperature mixed gas in the direct-connection pipe 4 directly into the pipeline, and discharge it through the holding tube 81 and the return pipe 22 to complete the cleaning of the entire system. The schematic diagram of the gas and liquid flow is as follows: Figure 8 shown.

[0062] The automatic liquid replenishment cut-off method of the present invention predicts and controls pipeline condensation, and at the same time judges the quality of and recycles pipeline condensed water, thereby completing the collection of effective condensed water to a great extent, and at the same time effectively reducing the breeding of bacteria in the condensed liquid retained in the pipeline, thereby ensuring the automatic replenishment of the humidification tank and the rational use of the condensed water, and ensuring the normal use of the humidification tank and its pipeline to avoid bacterial invasion.

[0063] The above is only an embodiment of the present invention, and common sense such as the specific structure and characteristics of the scheme are not described in detail here. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claim involved.

Claims

1. A liquid automatic supply and cut-off device, comprising a humidification tank (10), a heating assembly arranged at the bottom of the humidification tank (10), an external liquid supply assembly (30) arranged on the humidification tank (10), and an air outlet pipe (2) connected to the humidification tank (10), characterized in that: An internal liquid supply component (20) is provided between the humidification tank (10) and the air outlet pipe (2), and the internal liquid supply component (20) is provided with a liquid coordination replenishment system connected to the external liquid supply component (30). The internal liquid supply component (20) and the external liquid supply component (30) are controlled by the liquid coordination replenishment system to supply liquid to the humidification tank (10). The liquid coordination replenishment system includes a tank body liquid amount detection module, an external liquid supply control module and an internal liquid supply control module; the tank body liquid amount detection module is used to detect the liquid level height in the humidification tank (10) or the liquid amount in the humidification tank (10) in real time; the external liquid supply control module is used to control the liquid amount of the external liquid input into the humidification tank (10); the internal liquid supply control module is used to control the liquid amount of the internal liquid input into the humidification tank (10). When used, the following steps are included: S1. Obtain the amount of liquid in the tank (1) through the tank liquid detection module and determine whether the liquid amount is within the standard; S2, using a quality inspection module to check whether the condensate meets the filling standard. If it meets the standard, it is poured into the tank body (1); if it does not meet the standard, it is introduced into the waste liquid tank (8); S21, recording the time when the liquid first enters the container (81); S22, when liquid needs to be added, the residence time of the liquid in the holding cylinder (81) is obtained through the timer (83); S23, determining whether the stay time exceeds a threshold, if so, it is considered not to be in compliance, and if not, it is considered to be in compliance; S4, after the condensate flows back into the tank, the amount of liquid in the tank (1) is obtained again, and the amount of liquid required after the liquid is replenished is calculated; S5. Add external liquid according to the required amount of liquid to ensure the liquid amount in the tank (1).

2. The liquid automatic supply cut-off device according to claim 1, characterized in that: The humidification tank (10) comprises a tank body (1), wherein the tank body (1) is provided with an air inlet (11), an air outlet (12), and a liquid inlet (13), wherein the air outlet (12) is connected to the air outlet pipe (2), wherein the air outlet pipe (2) is provided with a plurality of water collecting bags (21), and a return pipe (22) is provided between the water collecting bags (21) and the liquid inlet (13), wherein the air inlet (11) is connected to the air inlet pipe (3), and a direct connection pipe (4) is provided between the air inlet pipe (3) and the air outlet pipe (2), wherein the tank A first heating component (51) is provided at the bottom of the body (1), a second heating component (52) is provided on the direct-connection pipe (4), a first temperature sensor (61) is provided at one end of the outlet pipe (2) close to the outlet (12), a second temperature sensor (62) is provided at the other end of the outlet pipe (2), a first cut-off switch (71) is provided at the air inlet (11), a second cut-off switch (72) is provided at the outlet (12), and a third cut-off switch (73) is provided on the outlet pipe (2).

3. The liquid automatic supply cut-off device according to claim 2, characterized in that: The water collecting package (21) includes a rotating ring body (211) disposed on the air outlet pipe (2). A diversion channel (212) is arranged inside the rotating ring body (211). The diversion channel (212) is connected with a water outlet hole, and the water outlet hole is connected with a conical water nozzle (213). A vibration motor (214) is arranged on the rotating ring body (211).

4. The liquid automatic supply cut-off device according to claim 3, characterized in that: A quality detection module is arranged between the return pipe (22) and the conical water nozzle (213). The quality detection module includes a loading cylinder (81), a liquid detector (82) and a timer (83) arranged on the loading cylinder (81).

5. The liquid automatic supply cut-off device according to claim 4, characterized in that: A fourth cut-off switch (74) is arranged on the return pipe (22). One end of the return pipe (22) is connected with a waste liquid tank (8).

6. The liquid automatic supply cut-off device according to claim 5, characterized in that: A pressure driver (84) is arranged on the return pipe (22) for generating negative pressure and positive pressure.

7. The liquid automatic supply cut-off device according to claim 6, characterized in that: It further includes the following steps: S3. The first temperature sensor (61) detects the temperature T1 of the air outlet (12), and the second temperature sensor (62) detects the temperature T2 of the air outlet pipe (2). Compare T1 and T2 to predict the condensation state and predict the condensate content. Obtain ΔT = T1 - T2, and compare ΔT with the K value. If ΔT < K, it is considered that the probability of condensation is small and less condensate is generated. If ΔT > K, it is considered that the probability of condensation is large and a certain amount of condensate will be generated. If ΔT > 2K, it is considered that the probability of condensation is extremely large and a large amount of condensate is generated. When ΔT > 2K appears, control the opening degree of the first cut-off switch (71) so that part of the gas enters the air outlet pipe (2) from the direct connection pipe (4). S6. After the gas supply is completed, adjust the opening degrees of the first cut-off switch (71) and the third cut-off switch (72) so that the hot air flow enters the air outlet pipe (2) from the direct connection pipe (4) and returns to the tank body (1) or the waste liquid tank (8) until the liquid detector (82) does not detect the liquid in the loading cylinder (81), then the work can be stopped.

8. The liquid automatic supply cut-off device according to claim 7, characterized in that: When ΔT > K occurs, judge whether the residence time of the liquid in the loading cylinder (81) is about to exceed the threshold. If it is in the situation of about to exceed the threshold, open the fourth cut-off switch (74) to introduce the liquid into the tank body (1).

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