Direct heating system and breathing machine

Abstract

The invention provides a direct heating system and a breathing machine. The direct heating system is used for heating water in a breathing machine water tank and comprises a heating aluminum substrate of a sheet structure, the heating aluminum substrate is located below a hole in the bottom of the breathing machine water tank, the front face of the heating aluminum substrate makes direct contact with water to be heated, and the back face of the heating aluminum substrate is provided with an electric heating element and a third connector; the heating aluminum substrate is wrapped by an aluminum substrate silicon rubber case; a first hole is formed in the aluminum substrate silica gel sleeve in the direction of wrapping the front surface of the heating aluminum substrate; except that the edge of the front surface of the heating aluminum substrate is wrapped by the aluminum substrate silicon rubber case, the rest part is exposed out of the first hole; a second hole is formed in the direction in which the aluminum substrate silica gel sleeve wraps the back surface of the heating aluminum substrate; a third connector of the heating aluminum substrate is exposed out of the second hole; the edge of the first hole of the aluminum substrate silicon rubber case is provided with a sealing convex rib; a pressing rib plate is arranged at the position, corresponding to the sealing convex rib, of the bottom of the breathing machine water tank, the sealing convex rib is pressed, and water in the breathing machine water tank is prevented from leaking. The boiler has the advantages of being high in heat efficiency and safe to use.

Description

Technical Field

[0001] The present application belongs to the technical field of ventilators, and specifically relates to a direct heating system and a ventilator. Background Art

[0002] The air in the ventilator needs to pass over the heated water surface to keep the air inhaled by the ventilator user moist. At present, the heating structure of the ventilator water tank is divided into two types: indirect heating and direct heating.

[0003] like Figure 1 As shown in the figure, in the indirect heating ventilator water tank, the electric heating water structure A2 is generally set at the bottom of the water tank A1. In order to prevent leakage, a multi-layer structure is used to wrap the electric heating plate. The heat generated by the electric heating plate needs to be transferred multiple times before it can reach the water. This heating method has low heating efficiency, and the heating structure generates severe heat around it, which can easily cause thermal damage to other devices and scald the operator.

[0004] like Figure 2 As shown, in the direct heating ventilator, the water tank is composed of a water tank upper shell B1 and a water tank lower shell B2. A silicone cushion B4 is installed on the water tank upper shell B1. The water tank heater B3 is installed on the silicone cushion B4. The water tank is connected to the host, and the electric energy is supplied to the heater B3 through the water tank heating control board, generating heat and transferring it to the water in the water tank to achieve water heating.

[0005] The buffer silicone pad B4 is made of silicone, which is convenient for manual disassembly and installation when adding water. The water tank heater B3 consists of a water tank heating control panel and an electric heater. When adding water, the heater B3 is removed together with the buffer silicone pad B4, and the electric heater will be exposed, which may burn people or objects. Because the entire heating part needs to be immersed in water, it is inconvenient to use glue to bond the buffer silicone pad B4 to the electric heater, which reduces the reliability of the electric heater fixation.

[0006] The electric heater is wrapped with a silicone protective cover B5 to prevent other parts of the water tank from being burned. Figure 3 As shown, the portion of the silicone protective cover B5 facing the bottom of the water tank needs to be provided with a spacing protrusion B6 to prevent the silicone protective cover B5 from being vacuum-adsorbed with the bottom of the water tank when the water temperature cools down, causing dry burning before the water in the water tank is consumed. Summary of the invention

[0007] The purpose of the present application is to overcome the defects of the existing heating system, such as low heating efficiency and easy scalding of operators.

[0008] In order to achieve the above-mentioned object, the present application proposes a direct heating system for heating water in a ventilator water tank, the system comprising: a heating aluminum substrate with a sheet structure;

[0009] The bottom of the ventilator water tank has an opening that is the same shape as the heated aluminum substrate and slightly smaller in size than the heated aluminum substrate;

[0010] The heating aluminum substrate is located below the opening at the bottom of the ventilator water tank, with its front side directly contacting the water to be heated, and its back side is provided with an electric heating element and a third connector; the third connector is used to connect to a power source;

[0011] The heated aluminum substrate is wrapped by an aluminum substrate silicone sleeve; a first hole is opened in the direction of the aluminum substrate silicone sleeve wrapping the front of the heated aluminum substrate; the front of the heated aluminum substrate, except for the edge wrapped by the aluminum substrate silicone sleeve, is exposed from the first hole; a second hole is opened in the direction of the aluminum substrate silicone sleeve wrapping the back of the heated aluminum substrate; the third connector of the heated aluminum substrate is exposed from the second hole;

[0012] The edge of the first hole of the aluminum substrate silicone sleeve is provided with a sealing convex rib; the bottom of the respirator water tank is provided with a compression rib plate at a position corresponding to the sealing convex rib; the compression rib plate compresses the sealing convex rib to prevent water in the respirator water tank from leaking.

[0013] As an improvement of the above system, the system further comprises a water tank heating conversion circuit board;

[0014] The water tank heating conversion circuit board comprises a water tank heating conversion circuit board body, a second connector and a connecting metal column;

[0015] The second connector and the connecting metal column are respectively fixed on the same side of the water tank heating conversion circuit board body; the second connector and the connecting metal column are electrically connected through the circuit inside the water tank heating conversion circuit board body;

[0016] The second connector and the third connector are electrically connected via a cable and an adapter;

[0017] The connecting metal column is used for connecting a power source.

[0018] As an improvement of the above system, the water tank heating conversion circuit board is located below the ventilator host and is vertically fixed in the base, with the connecting metal column on the top and the second connector on the bottom;

[0019] A protruding shaft of a connecting metal column extends from the upper part of the base; the protruding shaft of the connecting metal column wraps the cylindrical surface of the connecting metal column and exposes the end surface of the connecting metal column; the end surface of the connecting metal column is retracted into the protruding shaft of the connecting metal column;

[0020] The connecting metal column is tightly wrapped by a connecting metal column sealing ring at a position close to the water tank heating conversion circuit board body; the connecting metal column sealing ring is interference fit at the contact points with the connecting metal column, the water tank heating conversion circuit board body and the protruding shaft of the connecting metal column, so as to prevent water from seeping into the base through the gap between the connecting metal column and the protruding shaft of the connecting metal column.

[0021] As an improvement of the above system, the system further comprises a host heating conversion circuit board located at the bottom of the ventilator host;

[0022] The host heating conversion circuit board comprises a host heating conversion circuit board body, a first connector, a spring pin connector and a contact convex head;

[0023] The first connector is fixed on the main unit heating conversion circuit board body; the contact protrusion is fixed to the opposite end of the main unit heating conversion circuit board body on the same side as the first connector through a spring pin connector;

[0024] The first connector is used to connect to a power source;

[0025] The contact protrusion is a columnar structure with a built-in spring; when the host heating conversion circuit board is connected to the water tank heating conversion circuit board, the contact protrusion is in close one-to-one contact with the column head of the connecting metal column of the water tank heating conversion circuit board in the axial direction, and the spring is compressed.

[0026] As an improvement of the above system, the system further comprises a sealing surrounding rib plate of an annular structure located in the base;

[0027] A sealing ring of a sealing surrounding rib plate matching its shape is arranged below the sealing surrounding rib plate; the bottom cover of the ventilator presses the sealing ring of the sealing surrounding rib plate, so that the bottom cover of the ventilator, the sealing surrounding rib plate, the upper cover of the base, the back of the heating aluminum substrate and the sealing ring of the connecting metal column jointly form a sealed space;

[0028] The water tank heating conversion circuit board, the third connector and other circuit elements of the heating aluminum substrate, and the cables and adapters between the water tank heating conversion circuit board and the heating aluminum substrate are located in the sealed space.

[0029] As an improvement to the above system, a plurality of water leakage holes are arranged on the bottom cover of the respirator outside the range surrounded by the annular structure of the sealing surrounding rib plate.

[0030] As an improvement of the above system, a front stop rib plate is provided on the bottom cover of the ventilator, and a rear stop rib plate is provided on the base; the front stop rib plate and the rear stop rib plate clamp the water tank heating conversion circuit board from front and rear directions.

[0031] As an improvement to the above system, the first connector, the second connector and the third connector are 5-pin connectors.

[0032] As an improvement of the above system, the system further comprises a temperature sensor located on the back of the heated aluminum substrate; when the temperature sensor detects that the temperature of the heated aluminum substrate exceeds a set threshold, the system cuts off the power supply of the heated aluminum substrate.

[0033] The present application provides a ventilator, which includes the above-mentioned system.

[0034] Compared with the prior art, the advantages of this application are:

[0035] 1. This application adopts direct heating method, which has high thermal efficiency and will not cause excessive thermal damage to surrounding devices;

[0036] 2. When adding water to the water tank, the heating part will not come into contact with people or foreign objects, making it safer to use;

[0037] 3. The direct heating system of the present application has a simple structure, is easy to install, and is firm and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 Shown is a longitudinal section of an existing indirect heating ventilator;

[0039] Figure 2 Shown is a longitudinal section of an existing direct-heating ventilator;

[0040] Figure 3 The figure shows a schematic diagram of a silicone protective cover of an existing direct-heating ventilator heater;

[0041] Figure 4 Shown is a longitudinal cross-sectional view of the ventilator of the present application;

[0042] Figure 5 Shown is the structure diagram of the host heating conversion circuit board;

[0043] Figure 6 Shown is the structural diagram of the water tank heating conversion circuit board;

[0044] Figure 7 Shown is a structural diagram of a heated aluminum substrate;

[0045] Figure 8 Shown is a schematic diagram of the installation of a water tank heating conversion circuit board;

[0046] Fig. 9 Shown is a detailed diagram of the installation schematic of the water tank heating conversion circuit board;

[0047] Fig.10 Shown is an enlarged view of the details of the installation schematic diagram of the water tank heating conversion circuit board;

[0048] Fig.11 Shown are the three-dimensional diagram and longitudinal section diagram of the sealing ring of the connecting metal column;

[0049] Fig.12 The figure shows the position of the front stop rib plate for the water tank heating conversion circuit board in the base;

[0050] Fig.13The figure shows the position of the rear stop rib plate and the water leakage hole for the water tank heating conversion circuit board in the base;

[0051] Fig.14 The figure shows the structure of the sealing surrounding rib plate in the base;

[0052] Fig.15 The figure shows the structure of the sealing ring matched with the sealing surrounding rib plate;

[0053] Fig.16 The figure shows the structure of the aluminum substrate silicone sleeve;

[0054] Fig.17 Shown is a structural diagram of the compression rib plate on the base compressing the sealing rib.

[0055] Figure ID:

[0056] A1: Water tank for indirect heated ventilator A2: Electric heating water structure of indirect heating ventilator B1: Directly heated ventilator water tank upper shell B2: Directly heated ventilator water tank lower shell

[0057] B3: Direct Heating Ventilator Tank Heater B4: Direct Heating Ventilator Water Tank Silicone Cushion B5: Direct Heating Ventilator Water Tank Silicone Protective Cover

[0058] B6: Direct heating ventilator water tank silicone protective cover bumps

[0059] 1. Host 2. Water tank

[0060] 3. Host main circuit board 4. Host heating conversion circuit board

[0061] 5. Water tank heating conversion circuit board 6. Heating aluminum substrate

[0062] 7. First connector 8. Spring pin connector

[0063] 9. Contact convex head 10. Host heating conversion circuit board body 11. Connecting metal column 12. Second connector

[0064] 13. Water tank heating conversion circuit board body 14. Base

[0065] 15. Heating the front of the aluminum substrate 16. Heating the back of the aluminum substrate

[0066] 17. Electric heating element 18. Third connector

[0067] 19. Bottom cover 20. Connecting metal column protruding shaft

[0068] 22. Connecting metal column sealing ring 23. Front stop rib plate

[0069] 24. Rear stop rib plate 25. Water leakage hole

[0070] 26. Sealing surrounding rib plate 27. Sealing surrounding rib plate sealing ring

[0071] 28. Silicone sleeve for aluminum substrate 29. First hole

[0072] 30. Second hole 31. Sealing rib

[0073] 32. Press the rib plate DETAILED DESCRIPTION

[0074] The technical solution of the present application is described in detail below with reference to the accompanying drawings.

[0075] like Figure 4 As shown, the direct heating system provided by the present application is used to heat water in a ventilator water tank 2. The base 14 of the ventilator water tank 2 extends to one side, and the ventilator host 1 is mounted thereon. A heating aluminum substrate 6 is provided at the bottom of the water storage part of the water tank 2, and one surface of the heating aluminum substrate 6 is in direct contact with the water in the water tank for heating the water.

[0076] The heated aluminum substrate 6 is heated by the heating wire heating principle, and its power comes from the host main circuit board 3 on the top of the ventilator host. The host main circuit board 3 transmits electrical energy to the host heating conversion circuit board 4, and then passes it to the heated aluminum substrate 6 through the water tank heating conversion circuit board 5.

[0077] like Figure 5 As shown, the host heating conversion circuit board 4 is located at the bottom of the host 1, including a host heating conversion circuit board body 10, a first connector 7, a spring pin connector 8 and a contact protrusion 9. The first connector 7 is fixed to the host heating conversion circuit board body 10. The contact protrusion 9 is fixed to the host heating conversion circuit board body 10 through the spring pin connector 8, and is located at the opposite end on the same side as the first connector 7. The first connector 7 is preferably a 5pin connector. The first connector 7 is electrically connected to the contact protrusion 9 through the circuit in the host heating conversion circuit board body 10. The host main circuit board 3 is electrically connected to the first connector 7 of the host heating conversion circuit board 4 through a cable and an adapter (the cable and the adapter are not shown in the figure). The spring pin connector 8 and the contact protrusion 9 are combined into a male connector. The contact protrusion 9 is a cylindrical structure with a built-in spring, which is a retractable structure.

[0078] like Figure 6As shown, the water tank heating conversion circuit board 5 is embedded in the base 14, located below the host 1, and includes a water tank heating conversion circuit board body 13, a second connector 12 and a connecting metal column 11. The second connector 12 and the connecting metal column 11 are fixed on the same side of the water tank heating conversion circuit board body 13. The second connector 12 and the connecting metal column 11 are electrically connected through the circuit inside the water tank heating conversion circuit board body 13. The second connector 12 is preferably a 5pin connector. The connecting metal column 11 is preferably a copper column. After the host 1 is installed on the base 14, the contact protrusions 9 of each host heating conversion circuit board 4 are respectively in contact with the connecting metal column 11 of the water tank heating conversion circuit board 5 in the axial direction, and the spring inside the contact protrusion 9 is in a compressed state, so that the contact protrusion 9 is in close contact with the connecting metal column 11.

[0079] like Figure 7 As shown, the heating aluminum substrate 6 is a sheet structure. To adapt to the shape of the water tank 2, the heating aluminum substrate 6 can be made into a crescent shape and located at the bottom of the water tank 2. The front 15 of the heating aluminum substrate is aluminum alloy and directly contacts the water in the water tank. The back 16 of the heating aluminum substrate is provided with an electric heating element 17, a third connector 18 and other circuit elements. The third connector 18 is preferably a 5pin connector. The third connector 18 is electrically connected to the second connector 12 of the water tank heating conversion circuit board 5 through a cable and an adapter.

[0080] like Fig.16 As shown, the heated aluminum substrate 6 is wrapped by the aluminum substrate silicone sleeve 28. The aluminum substrate silicone sleeve 28 has a first hole 29 in the direction of wrapping the front face 15 of the heated aluminum substrate. In addition to wrapping the edge of the heated aluminum substrate 6, most of the front face 15 of the heated aluminum substrate is exposed to directly contact the water in the water tank 2. A second hole 30 is opened on the back of the aluminum substrate silicone sleeve 28 to expose the third connector 18 and other components such as fuses on the heated aluminum substrate 6. Except for the first hole 29 and the second hole 30, the other positions of the heated aluminum substrate 6 are completely wrapped by the aluminum substrate silicone sleeve 28 of a certain thickness. The aluminum substrate silicone sleeve 28 is made of silicone, which has a good heat insulation effect and can dissipate more heat from the heating surface of the heated aluminum substrate 6 to the water.

[0081] like Fig.17 As shown, the edge of the first hole 29 of the aluminum substrate silicone sleeve 28 has a sealing convex rib 31. The base of the water tank 2 has a pressing rib plate 32 at the edge position corresponding to the first hole 29. When the heated aluminum substrate 6 is correctly installed, the pressing rib plate 32 presses the sealing convex rib 31, which can seal the gap between the aluminum substrate silicone sleeve 28 and the base of the water tank 2.

[0082] like Figure 8 , Fig. 9 , Fig.10 and Fig.11As shown, the water tank heating conversion circuit board 5 is vertically fixed on the base 14, with the connecting metal column 11 on the top and the second connector 12 on the bottom. A connecting metal column protruding shaft 20 extends from the upper part of the base 14, and the connecting metal column protruding shaft 20 wraps the cylindrical surface of the connecting metal column 11 and exposes the end face of the connecting metal column 11. The end face of the connecting metal column 11 is retracted into the connecting metal column protruding shaft 20 to prevent the operator's fingers from directly contacting the connecting metal column 11. The position of the connecting metal column 11 close to the water tank heating conversion circuit board body 13 is tightly wrapped by the connecting metal column sealing ring 22, and the places where the connecting metal column sealing ring 22 contacts the connecting metal column 11, the water tank heating conversion circuit board body 13 and the connecting metal column protruding shaft 20 are all interference fits, preventing water from penetrating into the base 14 from the gap between the connecting metal column 11 and the connecting metal column protruding shaft 20. When the host 1 is mounted on the base 14 , the contact protrusion 9 of the host heating conversion circuit board 4 just extends into the protruding shaft 20 of the connecting metal column and is in close contact with the end surface of the connecting metal column 11 .

[0083] The connecting metal column 11 is retracted within the protruding shaft 20 of the connecting metal column to form a female connector. When the host 1 is installed on the base 14, it is connected to the male connector composed of the spring pin connector 8 and the contact protrusion 9. This connection method has the following advantages: (1) When the host 1 is installed on the base 14, the circuit is also connected at the same time, which is easy to operate; (2) There is only one way to connect the male connector and the female connector, and even people who do not understand the installation method will not install it incorrectly; (3) After connection, the entire circuit is sealed inside the insulator to prevent water from seeping into the circuit and causing a short circuit.

[0084] like Fig.12 , Fig.13 As shown, when the host heating conversion circuit board 4 is in the correct installation position, the contact protrusion 9 has a thrust effect on the connecting metal column 11. In order to fix the front and rear positions of the water tank heating conversion circuit board 5, a front stop rib 23 is provided on the bottom cover 19, and a rear stop rib 24 is provided on the base 14 (in order to show the specific position of the rear stop rib 24, Fig.13 The front stop rib 23 and the rear stop rib 24 clamp the water tank heating conversion circuit board 5 from the front and rear directions, and limit the water tank heating conversion circuit board 5. When the host heating conversion circuit board 4 is connected to the water tank heating conversion circuit board 5, the spring built into the contact protrusion 9 is compressed to generate a thrust on the water tank heating conversion circuit board 5, and the front stop rib 23 and the rear stop rib 24 can prevent the water tank heating conversion circuit board 5 from loosening.

[0085] like Fig.13 , Fig.14 and Fig.15As shown, a sealing surrounding rib plate 26 is provided in the base 14. The sealing surrounding rib plate 26 is an annular structure, which surrounds the water tank heating conversion circuit board 5, the third connector 18 of the heating aluminum substrate 6 and other circuit elements involved in the circuit, as well as the cables and adapters between the two. A sealing surrounding rib plate sealing ring 27 matching its shape is provided below the sealing surrounding rib plate 26. During installation, the bottom cover 19 presses the sealing surrounding rib plate sealing ring 27, so that the bottom cover 19, the sealing surrounding rib plate 26, the upper cover of the base 14, the back side 16 of the heating aluminum substrate and the connecting metal column sealing ring 22 together form a sealed space to keep the circuit in the sealed space dry. On the bottom cover 19, a plurality of leakage holes 25 are provided at positions outside the range of the sealing surrounding rib plate 26, so that even if there is water temporarily in other areas of the base 14, it will flow out from these leakage holes 25 and will not stay in the machine for a long time.

[0086] A temperature sensor is arranged on the back of the heating aluminum substrate 6 at the bottom of the water tank 2. When the temperature of the heating aluminum substrate 6 rises to a certain temperature, the fuse in the heating circuit is blown, cutting off the heating power supply to prevent dry burning.

[0087] The present application also includes a ventilator, comprising the above-mentioned direct heating system.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application is described in detail with reference to the embodiments, a person skilled in the art should understand that any modification or equivalent replacement of the technical solution of the present application does not depart from the spirit and scope of the technical solution of the present application and should be included in the scope of the claims of the present application.

Claims

1. A direct heating system for heating water in a ventilator water tank, characterized in that: The system includes: a heated aluminum substrate of sheet-like structure; The bottom of the ventilator water tank has an opening that is the same shape as the heated aluminum substrate and slightly smaller in size than the heated aluminum substrate; The heating aluminum substrate is located below the opening at the bottom of the ventilator water tank, with its front side directly contacting the water to be heated, and its back side is provided with an electric heating element and a third connector; the third connector is used to connect to a power source; The heated aluminum substrate is wrapped by an aluminum substrate silicone sleeve; a first hole is opened in the direction of the aluminum substrate silicone sleeve wrapping the front of the heated aluminum substrate; the front of the heated aluminum substrate, except for the edge wrapped by the aluminum substrate silicone sleeve, is exposed from the first hole; a second hole is opened in the direction of the aluminum substrate silicone sleeve wrapping the back of the heated aluminum substrate; the third connector of the heated aluminum substrate is exposed from the second hole; The edge of the first hole of the aluminum substrate silicone sleeve is provided with a sealing convex rib; the bottom of the respirator water tank is provided with a compression rib plate at a position corresponding to the sealing convex rib; the compression rib plate compresses the sealing convex rib to prevent water in the respirator water tank from leaking.

2. The direct heating system according to claim 1, characterized in that: The system also includes a water tank heating conversion circuit board; The water tank heating conversion circuit board comprises a water tank heating conversion circuit board body, a second connector and a connecting metal column; The second connector and the connecting metal column are fixed on the same side of the water tank heating conversion circuit board body; the second connector and the connecting metal column are electrically connected through the circuit inside the water tank heating conversion circuit board body; The second connector and the third connector are electrically connected via a cable and an adapter; The connecting metal column is used for connecting a power source.

3. The direct heating system according to claim 2, characterized in that: The water tank heating conversion circuit board is located below the ventilator host and is vertically fixed in the base, with the connecting metal column on the top and the second connector on the bottom; A protruding shaft of a connecting metal column extends from the upper part of the base; the protruding shaft of the connecting metal column wraps the cylindrical surface of the connecting metal column and exposes the end surface of the connecting metal column; the end surface of the connecting metal column is retracted into the protruding shaft of the connecting metal column; The connecting metal column is tightly wrapped by a connecting metal column sealing ring at a position close to the water tank heating conversion circuit board body; the connecting metal column sealing ring is interference fit at the contact points with the connecting metal column, the water tank heating conversion circuit board body and the protruding shaft of the connecting metal column, so as to prevent water from seeping into the base through the gap between the connecting metal column and the protruding shaft of the connecting metal column.

4. The direct heating system according to claim 3, characterized in that: The system also includes a host heating conversion circuit board located at the bottom of the ventilator host; The host heating conversion circuit board comprises a host heating conversion circuit board body, a first connector, a spring pin connector and a contact convex head; The first connector is fixed on the main unit heating conversion circuit board body; the contact protrusion is fixed to the opposite end of the main unit heating conversion circuit board body on the same side as the first connector through a spring pin connector; The first connector is used to connect to a power source; The contact protrusion is a columnar structure with a built-in spring; when the host heating conversion circuit board is connected to the water tank heating conversion circuit board, the contact protrusion is in close one-to-one contact with the column head of the connecting metal column of the water tank heating conversion circuit board in the axial direction, and the spring is compressed.

5. The direct heating system according to claim 4, characterized in that: The system also includes a sealing surrounding rib plate of an annular structure located in the base; A sealing ring of a sealing surrounding rib plate matching its shape is arranged below the sealing surrounding rib plate; the bottom cover of the ventilator presses the sealing ring of the sealing surrounding rib plate, so that the bottom cover of the ventilator, the sealing surrounding rib plate, the upper cover of the base, the back of the heating aluminum substrate and the sealing ring of the connecting metal column jointly form a sealed space; The water tank heating conversion circuit board, the third connector and other circuit elements of the heating aluminum substrate, and the cables and adapters between the water tank heating conversion circuit board and the heating aluminum substrate are located in the sealed space.

6. The direct heating system according to claim 5, characterized in that: A plurality of water leakage holes are arranged on the bottom cover of the respirator outside the range surrounded by the annular structure of the sealing surrounding rib plate.

7. The direct heating system according to claim 4, characterized in that: The first connector, the second connector and the third connector are 5-pin connectors.

8. The direct heating system according to claim 3, characterized in that: A front stop rib plate is arranged on the bottom cover of the ventilator, and a rear stop rib plate is arranged on the base; the front stop rib plate and the rear stop rib plate clamp the water tank heating conversion circuit board from front and rear directions.

9. The direct heating system according to claim 1, characterized in that: The system further comprises a temperature sensor located at the back of the heated aluminum substrate; when the temperature sensor detects that the temperature of the heated aluminum substrate exceeds a set threshold, the system cuts off the power supply of the heated aluminum substrate.

10. A ventilator, characterized in that: The ventilator comprises a system as claimed in any one of claims 1-9.

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