CN112807540B

CN112807540B - Breathing humidifier, dry burning detection method thereof and computer readable storage medium

Info

Publication number: CN112807540B
Application number: CN202110164984.7A
Authority: CN
Inventors: 江云; 张良; 曾映; 魏涛; 曾宪森
Original assignee: Guangdong Pumen Biomedical Technology Co ltd
Current assignee: Guangdong Pumen Biomedical Technology Co ltd
Priority date: 2021-02-05
Filing date: 2021-02-05
Publication date: 2022-11-15
Anticipated expiration: 2041-02-05
Also published as: CN112807540A

Abstract

The invention discloses a breathing humidifier, a dry combustion detection method thereof and a computer readable storage medium. The breathing humidifier comprises a humidification tank and a heater, wherein the heater is used for heating the humidification tank so as to vaporize liquid in the humidification tank. The dry burning detection method comprises the following steps: controlling the temperature of the heater to be maintained to a preset temperature; acquiring output power when the temperature of the heater is maintained at a preset temperature; and comparing the output power with the preset power, and if the output power is less than the preset power and the duration of the output power less than the preset power is greater than or equal to the preset duration, judging that the heater is in a dry-burning state. According to the dry combustion detection method of the breathing humidifier, whether the heater is in a dry combustion state or not can be detected without arranging a water level sensor, the operation is simple, the detection speed is high, the structure of the humidification tank is simplified, and the production cost of the humidification tank is saved.

Description

Breathing humidifier, dry burning detection method thereof and computer readable storage medium

Technical Field

The invention belongs to the technical field of medical equipment, and particularly relates to a breathing humidifier, a dry combustion detection method thereof and a computer readable storage medium.

Background

The breathing humidifier can deliver breathing gas with higher relative humidity and higher temperature suitable for the breathing of the body so as to assist the patient with spontaneous breathing to breathe, and provides a choice for clinical treatment.

Generally, whether a heater of a breathing humidifier is in a dry-burning state or not is detected, so that the problem of safety caused by excessive dry-burning of the heater is avoided in time. At present, in some technologies, a water level sensor is directly installed in a humidification tank, and when the water level is lower than a threshold value, the heater is in a dry-heating state. However, the humidification tank of the respiratory humidifier is usually disposable, and the cost is high because the water level sensor is arranged in the disposable humidification tank. In some technologies, humidity sensors are respectively arranged at the air inlet and the air outlet of the humidification tank to detect the absolute humidity of the air inlet and the air outlet of the humidification tank, and then the data of the two sensors are compared to judge whether the heater is dried. The method needs two additional humidity sensors, is complex to operate and inconvenient to disassemble and assemble, and needs to detect the humidity through the humidity sensors in advance, so that the detection speed is low.

Disclosure of Invention

Therefore, a dry combustion detection method of a breathing humidifier, which does not need to be provided with a water level sensor, is simple to operate and has high detection speed, is needed.

It is also desirable to provide a respiratory humidifier, a computer readable storage medium.

A dry combustion detection method of a breathing humidifier comprises a humidification tank and a heater, wherein the heater is used for heating the humidification tank to enable liquid in the humidification tank to be vaporized, and the dry combustion detection method comprises the following steps:

controlling the temperature of the heater to be maintained to a preset temperature;

acquiring the output power when the temperature of the heater is maintained at the preset temperature; and

and comparing the output power with a preset power, and if the output power is smaller than the preset power and the duration time of the output power smaller than the preset power is longer than or equal to a preset time length, judging that the heater is in a dry-burning state.

According to the dry combustion detection method of the breathing humidifier, the heater starts to work normally when the temperature of the heater is adjusted to the preset temperature, the output power of the heater when the temperature is maintained at the preset temperature is obtained, the output power and the preset power are carried out, if the output power is smaller than the preset power, and the duration time of the output power smaller than the preset power is longer than or equal to the preset time length, the heater is judged to be in a dry combustion state, a water level sensor is not needed to be arranged, the output power is obtained through a control device such as an MCU (micro control unit), whether the heater is in the dry combustion state can be judged by comparing and analyzing the output power and the preset power, the operation is simple, the detection speed is high, the structure of a humidification tank is simplified, and the production cost of the humidification tank is saved.

In one embodiment, the preset power is a set multiple of the working power of the heater;

wherein the working power is:

R ₁ relative humidity, R, of humidified gas output from said humidification tank ₀ For the relative humidity of the gas fed into the humidification tank, H _S Saturated humidity q at 32-37 deg.C _W The output gas quantity of the humidification tank is delta H, the enthalpy change of the liquid in the humidification tank is converted from a liquid state to a gas state,

is the molar mass of water molecules, eta ₁ Is the heating efficiency of the heater, eta ₂ Is the humidification efficiency of the respiratory humidifier.

In one of the embodiments, the first and second electrodes are, the set multiple is 0.8-1.

In one embodiment, after the step of detecting that the heater is in a dry-fire state, the method further comprises the following steps: and sending out an alarm signal of the dry burning of the heater.

In one embodiment, the alarm signal comprises at least one of an audible alarm signal and a visual alarm signal.

In one embodiment, after the step of detecting that the heater is in a dry-fire state, the method further comprises the following steps: turning off the heater.

In one embodiment, the preset temperature is 80-100 ℃.

In one embodiment, the preset time period is 30 seconds to 300 seconds.

In one embodiment, the step of controlling the temperature of the heater to be maintained to a preset temperature includes: and controlling the duty ratio output by a control device in the breathing humidifier so as to adjust and maintain the temperature of the heater to the preset temperature.

A respiratory humidifier, comprising:

a humidifying tank;

the heater is arranged close to the humidification tank and used for heating the humidification tank so as to vaporize the liquid in the humidification tank; and

the control device is used for controlling the temperature of the heater to be maintained to a preset temperature; the output power is used for obtaining the output power when the temperature of the heater is maintained at the preset temperature; and the heater is also used for comparing the output power with a preset power, and if the output power is smaller than the preset power and the duration time of the output power smaller than the preset power is longer than or equal to the preset time length, the heater is judged to be in a dry-burning state.

In one embodiment, the control device is used for sending out a warning signal of the dry combustion of the heater when the heater is in a dry combustion state.

In one embodiment, the respiratory humidifier further comprises a power cut-off device, wherein the power cut-off device can be connected with the heater, and the power cut-off device is used for cutting off power of the heater when the heater is in a dry-fire state.

In one embodiment, the humidifier comprises a shell and a pressurizer, wherein the shell is provided with a pressurizing cavity, the pressurizer is fixed in the pressurizing cavity, a cushion pad is clamped between the pressurizer and the cavity wall of the pressurizing cavity, the pressurizer can provide pressurized gas, and the gas outlet of the pressurizer is connected with the humidification tank, wherein the gas comprises at least one of oxygen and air.

In one embodiment, the shell is provided with a buffer cavity which is connected with the air outlet of the pressurizer and the humidification tank.

In one embodiment, the breathing humidifier further comprises a buffering cover, the buffering cover is located in the shell and is matched with the shell to form the buffering cavity, the side portion of the buffering cover is connected with the shell, the top of the buffering cover is opposite to the shell, the buffering cavity is provided with an inlet and an outlet, the inlet is located on the side portion and is connected with the air outlet of the pressurizer, the outlet is located on the top portion and is connected with the humidification tank, the buffering cover is provided with a partition plate, the partition plate is located between the inlet and the outlet, and the partition plate is connected with the side portion and the top and is spaced from the shell.

In one embodiment, a buffer layer is sandwiched between the buffer cover and the shell.

In one of them embodiment, including outage suggestion device, outage suggestion device includes alarm, the control unit and power supply ware, the control unit can be connected with external power supply, the control unit with the alarm is connected, the control unit can with control during external power supply disconnection the alarm sends outage cue signal, the power supply ware with the control unit reaches the alarm is all connected, with can the control unit with give during external power supply disconnection the control unit reaches the alarm power supply.

A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the above-mentioned dry-fire detection method.

Drawings

FIG. 1 is a schematic flow diagram of a dry fire detection method for a humidified respirator according to an embodiment;

FIG. 2 is a schematic structural view of one embodiment of a humidified respirator;

FIG. 3 is a cross-sectional view of the humidified respirator shown in FIG. 2;

FIG. 4 is an exploded view of the humidified respirator of FIG. 2 with the cover, the humidification canister, the connecting tube assembly and the output tube omitted;

FIG. 5 is a cross-sectional view of a bumper cap in the humidified respirator of FIG. 2;

FIG. 6 is a partial schematic view of a base and mixing chamber of the humidified respirator of FIG. 2;

FIG. 7 is a block circuit diagram of a power down prompt apparatus of the humidified respirator shown in FIG. 2.

The corresponding relation between each reference number and each meaning in the drawings is as follows:

100-respiratory humidifier, 110-humidification canister, 120-heater, 130-housing, 132-base, 134-cover, 1341-recess, 1343-mounting hole, 140-display, 1345-first cover, 1347-second cover, 1345 a-first chamber, 1347 a-second chamber, 150-pressurizer, 152-cushion, 154-pressurizing chamber, 156-pressurizing cover, 160-buffer chamber, 164-buffer cover, 161-inlet, 163-outlet, 164 a-side, 164 b-top, 164 c-baffle, 170-connecting tube assembly, 171-first tube, 172-second tube, 172 a-outlet tube section, 172 b-connecting tube section, 180-outlet tube, 113-outlet port, 173-support, 162-buffer layer, 132 a-bottom plate, 132 b-bottom cover, 190-mixing chamber, 195-air inlet, 192-porous structure, flow meter-193, 194-oxygen concentration sensor, 196-control unit, 198-alarm, 199-alarm.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will recognize without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "coupled" to another element, it can be directly coupled to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

In the following, unless otherwise specified, vaporization refers to the change of a substance from a liquid state to a gaseous state.

An embodiment of the application provides a dry combustion detection method of breathing humidifier, and this dry combustion detection mode need not to set up level sensor and can detect whether the heater is in the dry combustion state, and easy operation, detection speed are very fast, simplify the structure of humidifying jar, save the cost of humidifying jar. The breathing humidifier comprises a humidification tank and a heater, wherein the heater is used for heating the humidification tank so as to vaporize liquid in the humidification tank. The heater may be, for example, a heating plate or a heating plate. The respiratory humidifier may be, for example, a medical respiratory humidifier. It is understood that the respiratory humidifier is not limited to a medical respiratory humidifier, but may be a non-medical respiratory humidifier. The liquid in the humidification tank is, for example, purified water. It will be appreciated that the liquid in the humidifier is not limited to pure water, but may also be a liquid containing a therapeutic agent.

As shown in fig. 1, in an embodiment, the dry burning detection method includes the following steps S1 to S3:

s1, controlling the temperature of a heater to be maintained to a preset temperature;

s2, obtaining output power when the temperature of the heater is maintained at a preset temperature; and

and S3, comparing the output power with the preset power, and if the output power is smaller than the preset power and the duration time of the output power smaller than the preset power is longer than or equal to the preset time, judging that the heater is in a dry-burning state.

In the dry combustion detection method of the breathing humidifier, the heater starts to work normally when the temperature of the heater is adjusted to the preset temperature, the output power of the heater when the temperature is maintained at the preset temperature is obtained, the output power and the preset power are carried out, if the output power is smaller than the preset power, and the duration time of the output power smaller than the preset power is longer than or equal to the preset time, the heater is judged to be in a dry combustion state, a water level sensor is not needed to be arranged, the output power is obtained through the control device, and the heater can be judged to be in the dry combustion state or not by comparing and analyzing the output power and the preset power.

Specifically, the control device controls the temperature of the heater to be maintained to a preset temperature; the control device acquires the output power when the temperature of the heater is maintained at a preset temperature; the control device compares the output power with the preset power, and if the output power is smaller than the preset power and the duration time of the output power smaller than the preset power is longer than or equal to the preset time length, the heater is judged to be in a dry-burning state.

In one embodiment, the control device is a computer device. The control device comprises a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to realize the steps of the dry burning detection method. In one specific example, the control device is an MCU. A Micro Control Unit (MCU), also called a Single Chip Microcomputer (Single Chip Microcomputer) or a Single Chip Microcomputer (MCU), is a Chip-level computer formed by appropriately reducing the frequency and specification of a Central Processing Unit (CPU) and integrating peripheral interfaces such as a memory, a counter (Timer), a USB, an a/D converter, a UART, a PLC, a DMA, etc., and even an LCD driving circuit on a Single Chip, and performing different combination control for different applications. It is understood that the control device is not limited to the MCU, but may be a terminal or a server. The terminal can be, but is not limited to, various personal computers, notebook computers, smart phones, tablet computers and portable wearable devices, and the server can be implemented by an independent server or a server cluster formed by a plurality of servers.

In one embodiment, the preset temperature is a temperature that is automatically adjusted by the user according to a parameter set by the user when the respiratory humidifier is in operation. The parameter set by the user may be, for example, the flow rate of the humidified gas output by the humidification tank.

In one embodiment, the predetermined temperature is 80 ℃ to 100 ℃. The preset temperature is controlled to be 80-100 ℃, so that the air entering the humidifying tank can be heated and humidified to have proper temperature and humidity, and the temperature of the liquid in the humidifying tank is not too high to scald a user. Optionally, the preset temperature is 90-100 ℃.

In one embodiment, the step of controlling the temperature of the heater to be maintained to a preset temperature includes: setting a parameter (e.g., a therapy parameter) of the respiratory humidifier; and starting the heater for heating so as to heat the heater to a preset temperature, and maintaining the real-time temperature of the heater to the preset temperature. Further, after the step of turning on the heater for heating, the method further comprises the following steps: detecting the real-time temperature of the heater; and comparing the real-time temperature of the heater with the preset temperature, and if the real-time temperature of the heater is less than the preset temperature, continuing heating by the heater.

Wherein, a temperature sensor is adopted to detect the real-time temperature of the heater. A temperature sensor can be arranged in the breathing humidifier to detect the real-time temperature of the heater, and an external temperature sensor can also be adopted to detect the real-time temperature of the heater.

In one embodiment, the step of controlling the temperature of the heater to be maintained to a preset temperature includes: and controlling the duty ratio output by a control device in the breathing humidifier so as to adjust and maintain the temperature of the heater to the preset temperature. The control device is a computer device, and may be, for example, an MCU (micro controller Unit) or a control board card.

In one embodiment, the step of obtaining the output power at which the temperature of the heater is maintained at the preset temperature includes: the control device acquires the output power when the temperature of the heater is maintained at a preset temperature. Further, the control device acquires real-time output power when the temperature of the heater is maintained at a preset temperature. Specifically, the control means calculates the real-time output power of the heater according to the duty ratio of the output.

In one embodiment, the step of S3 comprises: the control device compares the output power with the preset power, and if the output power is smaller than the preset power and the duration time of the output power smaller than the preset power is longer than or equal to the preset duration time, the control device judges that the heater is in a dry-burning state. Further, the control device compares the real-time output power with a preset power, and if the real-time output power is smaller than the preset power and the duration time of the real-time output power smaller than the preset power is longer than or equal to the preset duration time, the control device judges that the heater is in a dry-burning state.

In one embodiment, the preset power is a set multiple of the operating power of the heater. The working power is the power of the heater during normal operation.

The respiratory humidifier is used as a device for outputting respiratory gas, and the temperature and the flow of the humidified gas need to be controlled. The temperature and the humidity of the humidifying gas output by the humidifying tank are controlled by adjusting the temperature of the heater and inputting the gas flow of the humidifying tank, and the temperature of the heater is controlled by changing the duty ratio output by the control device of the breathing humidifier. It has been found that the amount of airflow can directly affect the amount of evaporation of moisture and that the relative humidity of the input gases to the respiratory humidifier can affect the amount of humidification. Therefore, in this study, the working power is mainly affected by the output air flow of the humidification tank and the relative humidity of the air input into the humidification tank.

Based on this, in one embodiment, the operating power is:

R ₁ relative humidity, R, of the humidified gas output from the humidification tank ₀ Relative humidity of the gas fed to the humidification tank, H _S Saturated humidity q at 32-37 deg.C _W The delta H is the enthalpy change of the liquid in the humidification tank from liquid state to gas state,

is the molar mass of a water molecule, eta ₁ Is the heating efficiency of the heater, eta ₂ The humidifying efficiency of the breathing humidifier.

Wherein R is ₁ Directly set for the user or factory set for the breathing humidifier. R is ₀ In order to detect the relative humidity of the gas fed into the humidification tank by means of a humidity sensor. In one specific example, H _S Saturated humidity at 35 ℃ H _S Saturated humidity at 35 ℃ H _S Is a constant value, namely 39.7g/m ³ In addition, H is _S The humidity may be 35 deg.C or other temperature, such as 32 deg.C or 37 deg.CThe saturation humidity of (c). q. q.s _W And directly setting for the user. Eta ₁ The breathing humidifier is set for factory production for a fixed value. Eta ₂ The breathing humidifier is set for factory production for a fixed value. DELTA.H is a constant value, i.e., 40.8kJ/mol.

The value is constant, namely 18g/mol. Eta ₁ ×η ₂ 60 to 80 percent.

In one embodiment, the preset time period is 30 seconds to 300 seconds. The preset time is set to be 30-300 seconds, so that the heater can be quickly judged to be in a dry-burning state under the condition of avoiding misjudgment of the state of the heater. Optionally, the preset time period is 30 seconds to 200 seconds. Further, the preset time is 40-180 seconds.

In one embodiment, after the step of detecting that the heater is in the dry-fire state, the method further comprises the following steps: and sending out an alarm signal of the dry burning of the heater. Optionally, the alarm signal comprises at least one of an audible alarm signal and a visual alarm signal. Specifically, the breathing humidifier is provided with an alarm device. The alarm device is in signal connection with the control device. When the heater is in a dry-burning state, the control device controls the alarm device to send out alarm information of the dry-burning of the heater. More specifically, the alarm device includes at least one of an acoustic alarm device and an image alarm device. The sound alarm device can be a horn or a buzzer, for example, and the sound alarm device sounds to give an alarm through the horn or the buzzer. The image warning device may be, for example, a display, and the abnormality is indicated by the display.

In one embodiment, after the step of detecting that the heater is in the dry-fire state, the method further comprises the following steps: the heater is turned off. Further, after the step of detecting that the heater is in the dry-fire state, the method further comprises the following steps: the source of pressurized gas to the heater and the respiratory humidifier is turned off. The pressurized gas source is used for providing pressurized gas. The source of pressurized gas may be, for example, a blower. It should be noted that, the operation sequence of turning off the heater and turning off the pressurized gas source is not limited, and the heater may be turned off first and then the pressurized gas source is turned off, or the pressurized gas source may be turned off first and then the heater is turned off, or the heater and the pressurized gas source may be turned off at the same time.

In one embodiment, after the step of detecting that the heater is in the dry-fire state, the method further comprises the following steps: and sending out an alarm signal of the dry heating of the heater, and closing the heater. It should be noted that, the operation sequence of turning off the heater and sending out the alarm signal of the dry combustion of the heater is not limited, the heater may be turned off first and then the alarm signal of the dry combustion of the heater is sent out, and the turning off of the heater and the sending out of the alarm signal of the dry combustion of the heater may be performed simultaneously.

According to the dry combustion detection method of the breathing humidifier, the heater starts to work normally when the temperature of the heater is adjusted to the preset temperature, the output power of the heater when the temperature is maintained at the preset temperature is obtained, the output power and the preset power are carried out, if the output power is smaller than the preset power, and the duration time of the output power smaller than the preset power is longer than or equal to the preset time length, the heater is judged to be in a dry combustion state, a water level sensor is not needed to be arranged, the output power is obtained through the control device, and whether the heater is in the dry combustion state can be judged by comparing and analyzing the output power and the preset power.

Referring to fig. 2 and 3, an embodiment of the present invention further provides a respiratory humidifier 100, which can detect the dry-fire state of the heater 120 according to the dry-fire detection method of the above embodiment, without a water level sensor, and has simple operation and fast detection speed. The humidifier 100 may be, for example, a medical respiratory humidifier. It is understood that the humidifier 100 is not limited to a medical humidifier for respiratory tract, but may be a non-medical humidifier for respiratory tract.

The humidifier 100 includes a humidifier tank 110, a heater 120, and a control device (not shown). The heater 120 is disposed adjacent to the humidification tank 110 and is used for heating the humidification tank 110 to vaporize the liquid in the humidification tank 110. The control device is used for controlling the temperature of the heater 120 to be maintained to a preset temperature; and is used to obtain the output power when the temperature of the heater 120 is maintained at a preset temperature; and is further configured to compare the output power with a preset power, and if the output power is smaller than the preset power and the duration of the output power being smaller than the preset power is longer than or equal to the preset duration, determine that the heater 120 is in a dry-fire state.

In the above-mentioned breathing humidifier 100, the heater 120 normally works when the temperature of the heater 120 is adjusted to the preset temperature through the control device, the output power when the temperature of the heater 120 is maintained at the preset temperature is obtained, go on the output power and the preset power, if the output power is smaller than the preset power, and the duration that the output power is smaller than the preset power is greater than or equal to the preset duration, judge that the heater 120 is in the dry combustion state, need not to set up a water level sensor, can judge whether the heater 120 is in the dry combustion state, the operation is simple, the detection speed is fast, simplify the structure of the humidification tank 110, and the production cost of the humidification tank 110 is saved.

The humidifier 100 includes a housing 130. The humidification canister 110 is disposed on the housing 130. Further, the housing 130 includes a base 132 and a cover 134. The cover 134 covers the base 132. The cover 134 is provided with a recess 1341. The groove 1341 is formed by the cover 134 being recessed toward the base 132. The humidification canister 110 is partially disposed in the groove 1341 and abuts the bottom of the groove 1341. In the illustrated example, the humidification tank 110 has opposing tank bottom and top. The bottom of the humidification tank 110 is located in the groove 1341 and abuts the bottom of the groove 1341.

In one particular example, the humidification tank 110 is a transparent tank such that the amount of liquid within the humidification tank 110 can be visually observed. It should be noted that the humidification tank 110 may also be a non-transparent tank, and at this time, the control device of the present application may also be used to determine whether the humidification tank 110 is in a dry-fire state.

The liquid in the humidification tank 110 is, for example, pure water. It is to be understood that the fluid in the humidification tank 110 is not limited to pure water, but may also be a fluid containing a therapeutic agent.

The heater 120 is located at the bottom of the humidification tank 110. In the illustrated example, the heater 120 is a heating plate. The groove bottom of the groove 1341 is provided with a mounting hole 1343. An opening of the mounting hole 1343 is opposite to the base 132. The heater 120 is located in the mounting hole 1343 and is connected with the bottom of the humidification tank 110. The heater 120 is not limited to the heating plate, and may be another heater such as a heating plate.

In one embodiment, the control device is a computer device. The control device comprises a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to realize the following steps: controlling the temperature of the heater 120 to be maintained to a preset temperature; acquiring output power when the temperature of the heater 120 is maintained at a preset temperature; the output power is compared with the preset power, and if the output power is smaller than the preset power and the duration of the output power smaller than the preset power is longer than or equal to the preset duration, it is determined that the heater 120 is in a dry-fire state.

In this embodiment, the control device is an MCU. An MCU (micro controller Unit), also called a Single Chip Microcomputer (Single Chip Microcomputer) or a Single Chip Microcomputer (Single Chip Microcomputer), is a Chip-level computer formed by appropriately reducing the frequency and specification of a Central Processing Unit (CPU), and integrating peripheral interfaces such as a memory (memory), a counter (Timer), a USB, an a/D converter, a UART, a PLC, a DMA, and the like, and even an LCD driving circuit, on a Single Chip, and performing different combination control for different application occasions. It is understood that the control device is not limited to the MCU, but may be a terminal or a server. The terminal can be, but is not limited to, various personal computers, notebook computers, smart phones, tablet computers and portable wearable devices, and the server can be implemented by an independent server or a server cluster formed by a plurality of servers. The control device is not limited to the MCU, and may be a PLC (programmable logic controller).

In one embodiment, humidifier 100 further includes a display device 140. The display device 140 is provided on the housing 130. The display device 140 is capable of displaying the treatment parameters of the humidifier 100. The display device 140 can also be used for human interaction with the humidifier 100. The user sets treatment parameters such as the temperature of the humidification tank 110, the output airflow rate, and the oxygen concentration of the output gas via the display device 140. The control device is further used for controlling the display device 140 to display the treatment parameters of the humidifier 100.

In the illustrated example, the display device 140 is a display screen. The cover 134 has a first chamber cover 1345 and a second chamber cover 1347 connected thereto. The second chamber cover 1347 has a height higher than that of the first chamber cover 1345. The cover 134 covers the base 132, the first chamber cover 1345 cooperates with the base 132 to form a first chamber 1345a, and the second chamber cover 1347 cooperates with the base 132 to form a second chamber 1347a. The groove 1341 is provided on the first chamber cover 1345, and the mounting hole 1343 communicates with the first chamber 1345 a. The display device 140 is mounted on a sidewall of the second chamber cover 1347 near a side of the first chamber cover 1345.

In one embodiment, the display device 140 also has an alarm function. For example: the control device controls the display device 140 to give an alarm prompt when detecting that the heater 120 is in the dry-burning state. It should be noted that the alarm may be performed by providing an audible alarm device. When detecting that the heater 120 is in the dry-fire state, the control device controls the sound alarm device to give an alarm prompt. The sound alarm device may be a horn, a buzzer, or the like.

In one embodiment, the control device is further capable of de-energizing the heater 120 when the heater 120 is in a dry-fire condition. Further, when the heater 120 is in the dry-fire state, the control device adjusts the duty ratio of the output to 0 to turn off the heater 120.

In one embodiment, the predetermined temperature is 80 ℃ to 100 ℃. The preset temperature is set to 80-100 ℃, so that the gas entering the humidifying tank can be heated and humidified to have proper temperature and humidity, and the liquid in the humidifying tank can not be too high in temperature to scald users. Optionally, the preset temperature is 90-100 ℃. In one embodiment, the duty cycle of the control device output is adjusted to adjust and maintain the temperature of the heater 120 to a preset temperature.

In one embodiment, the preset power is a set multiple of the operating power of the heater 120. The operation power is a power of the heater 120 when it is normally operated.

In one embodiment, the operating power is:

R ₁ relative humidity, R, of humidified gas output from the humidification tank 110 ₀ Relative humidity of the gas to be fed into the humidification tank 110, H _S Saturated humidity q at 32-37 deg.C _W The output gas volume of the humidification tank 110, Δ H is the change in enthalpy of the liquid in the humidification tank 110 from the liquid state to the gas state,

is the molar mass of water molecules, eta ₁ Is the heating efficiency of the heater 120 eta ₂ The humidification efficiency of the respiratory humidifier 100.

Wherein R is ₁ Directly set for the user or factory set for the humidifier 100. R ₀ To detect the relative humidity of the gas input to the humidification tank 110 via a humidity sensor. In one specific example, H _S Saturated humidity at 35 ℃ H _S Is a constant value, namely 39.7g/m ³ In addition, H is _S The saturation humidity may be 35 ℃ or at other temperatures, for example, 32 ℃ or 37 ℃. q. q.s _W And directly setting for the user. Eta ₁ The breathing humidifier is set for factory production for a fixed value. Eta ₂ The breathing humidifier is set for factory production for a fixed value. DELTA.H is a constant value, i.e., 40.8kJ/mol.

The value is constant, namely 18g/mol. Eta ₁ ×η ₂ 60 to 80 percent.

In one embodiment, the preset time period is 30 seconds to 300 seconds. The preset time is set to be 30-300 seconds, so that the heater can be quickly judged to be in a dry-burning state under the condition of avoiding misjudgment of the state of the heater. Optionally, the preset time period is 30 seconds to 200 seconds. Further, the preset time period is 40-180 seconds.

In one embodiment, the control device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the control device is used to provide computational and control capabilities. The memory of the control device includes a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores a computer program and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the control device is used for storing operation data or detection data. The network interface of the control device is used for connecting and communicating with an external terminal through a network. Further, the control device also comprises a communication interface. The communication interface is used for carrying out wired or wireless communication with an external terminal, and the wireless communication can be realized through WIFI, an operator network, NFC (near field communication) or other technologies. It should be noted that the non-volatile storage medium storage may also have an operating system.

It will be appreciated by those skilled in the art that the above-described control device configuration is only a partial configuration relevant to the present application and does not constitute a limitation to the application of the present application to other control devices, and a particular control device may include more or less components than shown in the above-described control device configuration, or some components may be combined, or have a different arrangement of components.

Referring to fig. 3 and 4, the humidifier 100 further includes a pressurizer 150. Pressurizer 150 is used to provide pressurized gas. The pressurizer 150 is located within the housing 130. The outlet of the pressurizer 150 is connected to the humidification tank 110. Wherein the gas comprises at least one of oxygen and air. Further, the gas is a respiratory gas. The output gas of the pressurized gas processed by the humidifier 100 can meet the breathing requirement of the user. Further, the control device can also turn off the pressurizer 150 when the heater 120 is in a dry-fire state.

Further, a cushion 152 is interposed between the inner wall of the housing 130 and the pressurizer 150. The cushion pad 152 can reduce noise generated by vibration of the pressurizer 150. Further, the housing 130 is provided with a plenum chamber 154. The pressurizer 150 is fixed in the pressurizing chamber 154. The cushion 152 is sandwiched between the pressurizer 150 and the walls of the pressurizing chamber 154. The pressurizer 150 may be, for example, a blower. The cushion pad 152 may be, for example, a silicone pad or a foam pad. It is understood that the pressurizer 150 is not limited to the above-mentioned pressurizer, and may be other pressurizers, and may be selected as needed, for example, an air compressor. It is understood that the cushion pad 152 is not limited to a silicone pad or a foam pad, and may be another cushion pad such as a rubber pad, which may be selected as needed.

In the illustrated example, the humidifier 100 also includes a boost cap 156. The plenum cap 156 is received in the second chamber 1347a and sealingly engages the base 132 to form the plenum chamber 154. The plenum 154 is a sealed chamber. The pressurizer 150 is a blower. The pressurizer 150 is located within a plenum chamber 154. The cushion pad 152 is a silicone pad. The cushion 152 is sandwiched between the pressurizer 150 and the base 132.

Referring to fig. 3 to 5, the housing 130 further has a buffer chamber 160. The buffer chamber 160 is U-shaped or wave-shaped. One end of the buffer chamber 160 is connected to the air outlet of the pressurizer 150, and the other end is connected to the humidification tank 110. Further, the buffer chamber 160 has an inlet 161 and an outlet 163. The inlet 161 is connected to the outlet of the pressurizer 150. The outlet 163 is connected to the humidification tank 110. Research finds that the pressurized gas of the breathing humidifier is directly introduced into the humidifying tank, and the sudden release of the pressure causes the breathing humidifier to vibrate, so that noise is caused, and the rest of a user is influenced. This application is through the cushion chamber 160 that sets up U type or wave type to connect humidifying jar 110 and presser 150, make pressurized gas release gradually in cushion chamber 160, can reduce the organism vibrations that pressure variation arouses, the production of noise reduction guarantees service environment's silence.

Further, the humidifier 100 further includes a buffer cover 164, and the buffer cover 164 is accommodated in the housing 130 and cooperates with the housing 130 to form the buffer chamber 160. The bumper cover 164 has connected sides 164a and a top 164b. Side 164a is connected to housing 130 and top 164b is opposite housing 130. The inlet 161 is located on the side portion 164a and is connected to the air outlet of the pressurizer 150. The outlet 163 is located on the top 164b and is connected to the humidification canister 110. The buffer cover 164 is provided with a partition 164c. A partition 164c is located between the inlet 161 and the outlet 163. The partition 164c is connected to both the side portion 164a and the top portion 164b and is spaced apart from the housing 130. Further, side portion 164a is disposed around top portion 164b. The inlet 161 is connected to the outlet of the pressurizer 150.

By disposing the inlet 161 on the side 164a, disposing the outlet 163 on the top 164b, and disposing the partition 164c between the inlet 161 and the outlet 163, the partition 164c is connected to both the side 164a and the top 164b and is spaced apart from the housing 130, such that the pressurized gas entering from the inlet 161 is ejected onto the side 164a and the partition 164c, then ejected onto the housing 130 under the blockage of the partition 164c, then flows through the gap between the partition 164c and the housing 130, and then flows toward the outlet 163 and flows into the humidification tank 110. The pressurized gas gradually releases pressure through layer-by-layer impact with the wall of the buffer cavity 160, so that the machine body vibration caused by sudden pressure change is reduced, the noise is reduced, the quiet use environment is ensured, and the structure of the buffer cavity 160 is simplified as much as possible.

In one embodiment, a buffer layer 162 is sandwiched between the buffer cover 164 and the housing 130. The buffer layer 162 can reduce noise caused by vibration of the body. The buffer layer 162 may be, for example, a silicone pad or a foam pad. Specifically, the buffer chamber 160 is a sealed chamber. A buffer cover 164 is located within the plenum 154. The side portion 164a sealingly engages the base 132 to form the cushion chamber 160. The cushion layer 162 is sandwiched between the side portion 164a and the base 132. The spacer 164c is spaced apart from the buffer layer 162. It is understood that the buffer layer 162 is not limited to a silicone pad or a foam pad, and may be other buffer layers such as a rubber pad, which may be selected as needed.

Referring to fig. 2, in one embodiment, the humidifier 100 further includes a connecting tube assembly 170 and an output tube 180. The humidification canister 110 has an inlet port (not shown) and an outlet port 113. A connector assembly 170 connects the outlet 163 of the buffer chamber 160 with the inlet port of the humidification canister 110. The connecting pipe assembly 170 is connected to the air outlet port 113 of the humidification tank 110 and the output pipe 180. The end of the output tube 180 remote from the connector assembly 170 can be connected to a nasal oxygen tube. The nasal oxygen tubes can be connected directly to the respiratory tract of the user.

Further, the connecting pipe assembly 170 includes a first pipe 171 and a second pipe 172. The first tube 171 connects the outlet 163 of the buffer chamber 160 with the inlet port of the humidification canister 110. The second pipe 172 connects the outlet port 113 and the outlet pipe 180. Specifically, the air inlet port and the air outlet port 113 of the humidification tank 110 are arranged on the top of the humidification tank 110 at intervals. The first tube 171 is substantially L-shaped. Second tube 172 includes a connecting outlet tube segment 172a and a connecting tube segment 172b. An end of outlet pipe section 172a remote from connecting pipe section 172b is connected to outlet port 113. The extending direction of outlet pipe segment 172a and the extending direction of connecting pipe segment 172b intersect. The connecting tube section 172b extends away from the base 132. The end of connecting tube segment 172b remote from outlet tube segment 172a is connected to outlet tube 180.

By intersecting the extending direction of the air outlet pipe section 172a and the extending direction of the connecting pipe section 172b, the connecting pipe section 172b extends in the direction away from the base 132, so that the water condensed in the flowing process of the heated air output by the humidification tank 110 in the output pipe 180 can flow back to the humidification tank 110 through the second pipe 172, and the safety problems of water choking and the like caused by the suction of a large amount of condensed water by a user can be avoided.

In the illustrated example, the outlet pipe section 172a is vertically disposed. The air outlet pipe section 172a and the connection pipe section 172b are integrally formed. It is understood that the outlet pipe section 172a and the connecting pipe section 172b are not limited to being integrally formed, and other connecting methods are also possible.

Further, the connecting pipe assembly 170 further includes a support 173. One end of the support 173 is connected to the connection between the outlet pipe section 172a and the connection pipe section 172b, and the other end is connected to the cover 134. Because the humidification canister 110 is easy to move away from the base 132 and is easy to separate from the base 132 due to the influence of the air pressure during the operation, the support 173 applies a blocking force to the humidification canister 110 when the humidification canister 110 moves away from the base 132, so as to block the humidification canister 110 from moving away from the base 132, thereby increasing the installation stability of the humidification canister 110.

Further, the output pipe 180 is an electric heating pipe capable of heating the gas entering the output pipe 180. At this time, the support 173 may be hollow. The support 173 is connected to the cover 134. The electrical connection wire of the output tube 180 can be inserted through the support 173 and connected to a power supply (not shown) in the cover 134. In the illustrated example, the support 173 is an integrally formed structure with the second tube segment 172. The end of the support member 173 remote from the second tube section 172 is connected to the end of the first tube 171 remote from the humidification tank 110. It is understood that the support member 173 and the second pipe section 172 are not limited to being integrally formed, and other connecting methods are also possible.

Referring to fig. 6, the housing 130 is further provided with a mixing chamber 190. The air inlet of the mixing chamber 190 can be connected to a source of oxygen and air. The outlet of the mixing chamber 190 is connected to the inlet of the pressurizer 150. A porous structure 192 is disposed within the mixing chamber 190. The porous structure 192 has a plurality of through holes. A porous structure 192 is located between the inlet and outlet of the mixing chamber 190. The oxygen and air entering from the air inlet of the mixing chamber 190 can be sufficiently mixed through the porous structure 192.

Referring to fig. 4, the base 132 further includes a bottom plate 132a and a bottom cover 132b. Bottom cap 132b covers bottom plate 132a and cooperates to form a sealed mixing chamber 190. The plenum cover 156 sealingly engages the bottom cover 132b to form the plenum chamber 154. A connection port (not shown) is formed on the bottom cover 132b, and an air inlet of the pressurizer 150 is connected to the connection port of the bottom cover 132b so that the gas of the mixing chamber 190 can enter the pressurizer 150. The cushion pad 152 is interposed between the pressurizer 150 and the bottom cover 132b. The buffer cover 164 is sealingly coupled to the bottom cover 132b to cooperatively form the buffer chamber 160. The buffer layer 162 is interposed between the side portion 164a of the buffer cover 164 and the bottom cover 132b.

The mixing chamber 190 is provided with an air inlet 195 and an oxygen inlet (not shown). The air inlet 195 is in direct communication with the atmosphere. The oxygen inlet of the mixing chamber 190 can be connected to an oxygen source. The oxygen source may be, for example, an oxygen tank. The air inlet 195 is not limited to be connected to the atmosphere, and may be connected to another device capable of supplying air.

The porous structure 192 is a porous plate. The porous structural member 192 has a substantially strip-shaped plate shape. The peripheral edge of the porous structure 192 is hermetically connected to the bottom plate 134a and the bottom cover 134b, so that the oxygen and the air are mixed by the porous structure 192 after entering the mixing chamber 190 and then flow to the air outlet of the mixing chamber 190.

Referring to fig. 4, an oxygen concentration sensor 194 is disposed in the mixing chamber 190. The oxygen inlet of the mixing chamber 190 is provided with a control valve (not shown). The humidifier 100 also includes a controller (not shown). The controller is in signal connection with both the oxygen concentration sensor 194 and the control valve. The controller can receive the oxygen concentration detected by the oxygen concentration sensor 194 and control the opening of the control valve. Can real-time detection through oxygen concentration sensor 194 the oxygen concentration in the hybrid chamber 190, can in time adjust the oxygen concentration in the hybrid chamber 190 through controller and control valve to satisfy the breathing needs. In the illustrated example, the oxygen concentration sensor 194 is disposed proximate to the gas outlet of the mixing chamber 190. The control valve is a proportional valve. Wherein, the opening degree is the valve caliber of the control valve.

Referring to fig. 6, a flow meter 193 is further disposed in the mixing chamber 190, and the flow meter 193 is used for detecting the gas flow in the mixing chamber 190.

A respiratory humidifier is of vital importance to users who need respiratory assistance. If the user breathes difficultly due to accidental power failure, safety problems such as fire disasters and the like can be caused. Referring to fig. 7, in order to avoid safety problems caused by accidental power failure of the humidifier, the humidifier 100 of the present application further includes a power failure prompt device. The power-off prompting device comprises an alarm 199, a control unit 196 and a power supply 198, wherein the control unit 196 can be connected with an external power supply, the control unit 196 is connected with the alarm 199, the control unit 196 can control the alarm 199 to send a power-off prompting signal when the control unit 196 is disconnected with the external power supply, and the power supply 198 is connected with the control unit 196 and the alarm 199 so that the control unit 196 and the alarm 199 can be powered when the control unit 196 is disconnected with the external power supply. The alarm 199 is provided to send out a power failure prompt signal in time when power failure occurs accidentally, so as to inform a user or medical staff to perform treatment in time. When the control unit 196 is disconnected from the external power supply, the power supply 198 supplies power to the control unit 196 and the alarm 199, so that the humidifier 100 can still meet the normal use of a user when the power is accidentally cut off.

In one particular example, the alarm 199 is a buzzer. The control Unit 196 is an MCU (micro controller Unit). The power supply 198 is a farad capacitor. The power supply of the singlechip adopts a farad capacitor and an external power supply to supply power simultaneously. When the breathing humidifier 100 is in a normal working state, the singlechip is only powered by an external power supply, and the external power supply charges the farad capacitor. The singlechip detects that external power source is in normal operating condition, controls buzzer and closes. When the external power supply is suddenly and unexpectedly disconnected, the external power supply stops supplying power to the singlechip and charging the farad capacitor, the farad capacitor is started to discharge, the singlechip and the buzzer driving circuit are simultaneously supplied with power, the singlechip detects that the external power supply is disconnected, and the buzzer is controlled to continuously give an alarm sound which is not less than 40 seconds.

The alarm 199 is not limited to a buzzer, and may be another alarm, for example, a horn or a speaker. The control unit 196 is not limited to the MCU, and may be another control unit, for example, a PLC (programmable logic controller). The power supplier 198 is not limited to a farad capacitor, and may be another power supplier, such as a battery.

Generally, the oxygen source is usually an oxygen tank, and the oxygen released from the oxygen tank has a certain pressure, so that the flow rate of the gas directly released into the mixing chamber is fast, which is not favorable for mixing with air. In other embodiments of the present application, a baffle (not shown) is also disposed within the mixing chamber 190. The baffle is positioned between the air inlet of the mixing chamber 190 and the porous structure 192. The baffle is positioned opposite the air inlet of the mixing chamber 190. One end of the baffle is fixedly connected with the cavity wall of the mixing cavity 190, and the other end of the baffle is spaced from the cavity wall of the mixing cavity 190. The gas entering through the gas inlet of the mixing chamber 190 is blocked by the baffle plate to reduce the flow rate, and the reduced gas flows through the gap between the baffle plate and the wall of the mixing chamber 190. It should be noted that the number of the baffles is not limited, and there may be one or more baffles. When there are a plurality of baffles, the plurality of baffles are spaced between the air inlet of the mixing chamber 190 and the porous structure 192. Two adjacent baffles are staggered and extend in the intersecting direction, so that the gas flow between the gas inlet of the mixing chamber 190 and the porous structure 192 is wave-shaped.

It is understood that humidifier 100 also includes a humidity sensor (not shown). The humidity sensor is used to measure the relative humidity of the gas input to the humidification tank 110. In one embodiment, a humidity sensor is disposed within the mixing chamber 190 between the porous structure 192 and the air outlet of the mixing chamber 190. The humidity sensor is not limited to being disposed in the mixing chamber 190, and may be disposed in a portion of the air path system of the humidifier 100 after the porous structure 192 and before the air inlet of the humidification tank 110, for example, at the air inlet of the humidification tank 110, the air inlet of the pressurizer 120, or the air outlet.

It is to be understood that the timing for the control device to turn off the heater 120 and turn off the pressurizer 150 is not limited, and the heater 120 may be turned off first and then the pressurizer 150 may be turned off first, the pressurizer 150 may be turned off first and then the heater 120 may be turned off, or both the heater 120 and the pressurizer 150 may be turned off.

It can be understood that the timing sequence of the heater 120 being turned off by the control device and the alarm device being controlled by the control device to send out the dry-fire alarm signal is not limited, the heater 120 may be turned off first and then the dry-fire alarm signal is sent out, the heater 120 may be turned off first and then the heater 120 may be turned off, and the heater 120 may be turned off and the dry-fire alarm signal may be sent out simultaneously.

For other embodiments of the humidifier 100 provided in the present application, reference may be made to the above description of the dry combustion detection method of the humidifier provided in the embodiments of the present application, and details are not repeated herein.

An embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the dry burning detection method of the above embodiment. Other embodiments of the computer-readable storage medium provided by the present application refer to the above description of the method for detecting dry fever of a humidifier and the humidifier 100 provided by the above embodiments of the present application, and are not described herein again.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above may be implemented by hardware instructions of a computer program, which may be stored in a non-volatile computer-readable storage medium, and when executed, may include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), for example.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A dry combustion detection method of a breathing humidifier is characterized in that the breathing humidifier comprises a humidification tank and a heater, the heater is used for heating the humidification tank to vaporize liquid in the humidification tank, and the dry combustion detection method comprises the following steps:

comparing the output power with a preset power, and if the output power is smaller than the preset power and the duration time of the output power smaller than the preset power is longer than or equal to a preset time length, judging that the heater is in a dry-burning state;

wherein the preset power is a set multiple of the working power of the heater;

wherein the working power is:

R ₁ relative humidity, R, of humidified gas output from said humidification tank ₀ Relative humidity of the gas fed to the humidification tank, H _S Saturated humidity q at 32-37 deg.C _W The output gas quantity of the humidification tank, the delta H is the enthalpy change of the liquid in the humidification tank from the liquid state to the gas state,

is the molar mass of a water molecule, eta ₁ Is the heating efficiency of the heater, eta ₂ Is the humidification efficiency of the respiratory humidifier.

2. The dry burning detection method according to claim 1, wherein the set multiple is 0.8 to 1.

3. The dry combustion detection method according to claim 1, further comprising, after the step of detecting that the heater is in a dry combustion state, the steps of: and sending out an alarm signal of the dry burning of the heater.

4. The dry fire detection method according to claim 3, wherein the alarm signal comprises at least one of an audible alarm signal and a visual alarm signal.

5. The dry combustion detection method as claimed in claim 1, further comprising the steps of, after the step of detecting that the heater is in the dry combustion state: turning off the heater.

6. The dry fire detection method according to claim 1, wherein the preset temperature is 80 ℃ to 100 ℃;

and/or the preset duration is 30-300 seconds;

and/or the step of controlling the temperature of the heater to be maintained to a preset temperature comprises the following steps: and controlling the duty ratio output by a control device in the breathing humidifier so as to adjust and maintain the temperature of the heater to the preset temperature.

7. A respiratory humidifier, comprising:

a humidifying pot;

the control device is used for controlling the temperature of the heater to be maintained to a preset temperature; the output power is used for obtaining the output power when the temperature of the heater is maintained at the preset temperature; the heater is also used for comparing the output power with a preset power, and if the output power is smaller than the preset power and the duration time of the output power smaller than the preset power is longer than or equal to a preset time length, the heater is judged to be in a dry-burning state;

wherein the preset power is a set multiple of the working power of the heater;

wherein the working power is:

R ₁ relative humidity, R, of humidified gas output from said humidification tank ₀ Relative humidity of the gas fed into the humidification tank, H _S Saturated humidity q at 32-37 deg.C _W The output gas quantity of the humidification tank, the delta H is the enthalpy change of the liquid in the humidification tank from the liquid state to the gas state,

8. The respiratory humidifier according to claim 7, further comprising an alarm device, wherein the alarm device is connected to the control device, and the alarm device is configured to send an alarm signal for dry-heating of the heater when the heater is in a dry-heating state;

and/or the control device is also used for powering off the heater when the heater is in a dry-burning state.

9. The respiratory humidifier according to claim 7, further comprising: the shell is provided with a pressurizing cavity, the pressurizer is fixed in the pressurizing cavity, a cushion pad is clamped between the pressurizer and the cavity wall of the pressurizing cavity, the pressurizer can provide pressurized gas, and the gas outlet of the pressurizer is connected with the humidification tank, wherein the gas comprises at least one of oxygen and air.

10. The respiratory humidifier according to claim 9, wherein the housing is provided with a buffer chamber, and the buffer chamber is connected with the air outlet of the pressurizer and the humidification tank.

11. The humidifier according to claim 10, further comprising a buffer cover, wherein the buffer cover is located in the housing and cooperates with the housing to form the buffer chamber, a side portion of the buffer cover is connected to the housing, a top portion of the buffer cover is opposite to the housing, the buffer chamber has an inlet and an outlet, the inlet is located on the side portion and is connected to the gas outlet of the pressurizer, the outlet is located on the top portion and is connected to the humidification tank, the buffer cover is provided with a partition plate, the partition plate is located between the inlet and the outlet, and the partition plate is connected to both the side portion and the top portion and is spaced from the housing.

12. The humidifier according to claim 11, wherein a buffer layer is sandwiched between the buffer cover and the housing.

13. The respiratory humidifier according to any one of claims 7-12, comprising a power-off prompting device, wherein the power-off prompting device comprises an alarm, a control unit and a power supply, the control unit can be connected with an external power supply, the control unit is connected with the alarm, the control unit can control the alarm to send a power-off prompting signal when the control unit is disconnected with the external power supply, and the power supply is connected with the control unit and the alarm so as to supply power to the control unit and the alarm when the control unit is disconnected with the external power supply.

14. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the dry fire detection method according to any one of claims 1 to 6.