Air supply device and gas water heater

Abstract

The application discloses a kind of air supply equipment and gas water heater, it is related to water heater technical field.The air supply equipment includes volute, air supply wheel, motor and heat insulating material piece;Volute is equipped with fan flow channel;Air supply wheel is located in fan flow channel;Motor includes the motor body and motor shaft connected, motor body is located in the side of volute, motor shaft is inserted into fan flow channel, and is transmissionally connected with air supply wheel;Heat insulating material piece is located between motor body and volute, heat insulating material piece is configured to block the heat transfer in fan flow channel to motor body.The technical scheme of the application can prevent motor temperature rise too high, and solve the problem of motor performance decline simultaneously.

Description

Technical Field

[0001] This invention relates to the field of water heater technology, and in particular to a ventilation device and a gas water heater. Background Technology

[0002] During the air supply process, the air supply equipment usually uses a blower or exhaust method to introduce air into the combustion heat exchange chamber for combustion. However, the heat of the intake air is relatively high, so the motor needs to be insulated.

[0003] While existing technology discloses the use of an isolation structure and a heat-insulating gasket between the volute and the motor housing, this isolation structure achieves heat insulation through a space-space arrangement. The heat-insulating gasket's function is to trap the flue gas within the heat-insulating cavity between the gasket and the motor shaft. Although this can reduce the motor temperature to some extent, the presence of the space-space and heat-insulating gasket leads to an increase in the motor shaft length and a deterioration in dynamic balance, which in turn reduces the maximum speed of the ventilation equipment and ultimately degrades its performance. Summary of the Invention

[0004] The main objective of this invention is to provide a pipe assembly and a gas water heater designed to prevent excessive motor temperature rise and to address the problem of motor performance degradation.

[0005] To achieve the above objectives, the present invention provides an air supply device comprising:

[0006] The volute is equipped with a fan flow channel;

[0007] An air impeller is disposed within the fan flow channel;

[0008] The motor includes a motor body and a motor shaft connected together. The motor body is located on one side of the volute, and the motor shaft is inserted into the fan flow channel and is connected to the blower wheel in a drive connection.

[0009] A heat insulation material is disposed between the motor body and the volute, and the heat insulation material is configured to block the heat transfer in the fan flow channel to the motor body.

[0010] In one embodiment of this application, the cross-sectional area of ​​the heat insulation material is greater than or equal to the cross-sectional area of ​​the motor body.

[0011] In one embodiment of this application, the projection of the motor body on the volute falls within the projection range of the heat insulation material on the volute.

[0012] In one embodiment of this application, the heat insulation material is a heat insulation ring, and the motor shaft passes through the heat insulation ring.

[0013] In one embodiment of this application, the heat insulation material is at least one of heat insulation cotton and aerogel material.

[0014] In one embodiment of this application, the heat insulation material has a first side and a second side opposite to each other. The first side abuts against the surface of the volute near the motor body, and the second side abuts against the surface of the motor body near the volute.

[0015] In one embodiment of this application, the volute is provided with an installation port on the side near the motor body. The installation port is configured to allow the blower wheel to be installed into the fan flow channel and to allow the motor shaft to be inserted into the fan flow channel; the heat insulation material is provided on the installation port.

[0016] In one embodiment of this application, the thickness of the thermal insulation material is defined as W, which satisfies: 1mm≤W≤10mm;

[0017] And / or, the thermal insulation material is bonded to the volute and / or the motor body.

[0018] In one embodiment of this application, a mounting portion is provided on the periphery of the motor body, and the mounting portion is connected to the volute.

[0019] To achieve the above objectives, the present invention also provides a gas water heater, comprising:

[0020] The water heater body includes an outer shell, a combustion heat exchange chamber, and a main heat exchanger. The combustion heat exchange chamber is located inside the outer shell, and the main heat exchanger is located inside the combustion heat exchange chamber.

[0021] The air supply device described above is disposed within the housing and is configured to introduce external air and / or fuel gas into the combustion heat exchange chamber through the fan flow channel.

[0022] In one embodiment of this application, the combustion heat exchange chamber is provided with an air inlet and a smoke outlet; the air outlet of the air supply device is connected to the air inlet, or the air inlet of the air supply device is connected to the smoke outlet.

[0023] In one embodiment of this application, the water heater body further includes:

[0024] The air-to-air heat exchanger has an air inlet channel and an exhaust channel. The air outlet end of the air inlet channel is connected to the air inlet end of the air supply equipment so that external air introduced from the air inlet channel is transported to the air inlet through the fan flow channel. The air inlet end of the exhaust channel is connected to the exhaust outlet so that the flue gas drawn from the exhaust outlet is discharged to the outside through the exhaust channel.

[0025] Alternatively, the air outlet of the air intake channel is connected to the air inlet so that external air introduced from the air intake channel is delivered to the air inlet; the air inlet of the smoke exhaust channel is connected to the air outlet of the air supply device so that the smoke drawn from the smoke outlet is discharged outward from the smoke exhaust channel through the fan flow channel.

[0026] The gas-to-gas heat exchanger is configured to heat the air flowing through the air intake passage with the flue gas flowing through the exhaust passage.

[0027] The air supply device of this invention is applied to a gas water heater. By adding a heat insulation material between the motor body and the volute, when the intake air enters the machine frame in the form of hot air, the motor drives the blower wheel to rotate in the fan channel of the volute, so as to send the hot air into the combustion heat exchange chamber of the gas water heater for combustion. During this process, the hot air or the flue gas after combustion will flow through the fan channel of the volute. The heat in the fan channel can be blocked by the heat insulation material to reduce the heat transfer from the fan channel to the motor body, which can prevent the motor temperature from rising too high, thus preventing the motor operating efficiency from decreasing or even damaging the motor. At the same time, the addition of heat insulation material between the motor body and the volute will not cause the motor shaft length to increase or the dynamic balance to deteriorate, thus also solving the problem of motor performance degradation. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of an embodiment of the air supply device of the present invention;

[0030] Figure 2 This is a side view of an embodiment of the air supply device of the present invention;

[0031] Figure 3 for Figure 2 Sectional view at point AA;

[0032] Figure 4 for Figure 3 A magnified view of a section at point B in the middle;

[0033] Figure 5 This is an exploded view of an embodiment of the air supply device of the present invention;

[0034] Figure 6 This is a schematic diagram of the structure of an embodiment of the forced-blowing gas water heater of the present invention;

[0035] Figure 7 This is a structural schematic diagram of an embodiment of the forced-draft gas water heater of the present invention.

[0036] Explanation of icon numbers:

[0037] label name label name 1000 Gas water heater 42 Second side 100 air supply equipment 200 Water heater body 10 Snail shell 210 shell 11 Fan flow channel 220 Combustion heat exchanger 12 Installation port 201 air intake 20 air blower 202 Smoke outlet 30 motor 230 Main heat exchanger 31 motor body 240 air-to-air heat exchanger 311 Installation Department 241 first tube body 312 connector 242 Second tube body 32 motor shaft 243 gas-to-gas heat exchanger 40 Thermal insulation components 203 intake channel 41 First side view 204 Smoke exhaust duct

[0038] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0040] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0041] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0042] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0043] During the air supply process, the air supply equipment usually uses a blower or exhaust method to introduce air into the combustion heat exchange chamber for combustion. However, the heat of the intake air is relatively high, so the motor needs to be insulated.

[0044] While existing technology discloses the use of an isolation structure and a heat-insulating gasket between the volute and the motor housing, this isolation structure achieves heat insulation through a space-space arrangement. The heat-insulating gasket's function is to trap the flue gas within the heat-insulating cavity between the gasket and the motor shaft. Although this can reduce the motor temperature to some extent, the presence of the space-space and heat-insulating gasket leads to an increase in the motor shaft length and a deterioration in dynamic balance, which in turn reduces the maximum speed of the ventilation equipment and ultimately degrades its performance.

[0045] Alternatively, some related technologies for cooling motors may include installing a cooling impeller between the motor body and the volute. While this design can effectively reduce motor temperature, the presence of the cooling impeller also leads to an increase in the motor shaft length and a deterioration in dynamic balance, which in turn reduces the maximum speed of the air supply equipment and ultimately degrades its performance.

[0046] Because this invention specifically enhances the recovery of latent heat from flue gas, the air temperature entering the volute will be higher, thus requiring more robust heat insulation for the motor. The existing technology described above, due to its longer motor shaft, more easily absorbs heat from the high-temperature air and transfers it to the motor along the shaft, resulting in a technical drawback that reduces motor lifespan.

[0047] Therefore, the present invention proposes an air supply device 100, which aims to prevent the motor 30 from overheating and to solve the problem of performance degradation of the motor 30. The structure of the air supply device 100 will be described below by way of embodiments.

[0048] like Figures 1 to 5 As shown, the air supply device 100 includes a volute 10, an air impeller 20, a motor 30, and a heat insulation material component 40.

[0049] The volute 10 is provided with a fan flow channel 11; the blower wheel 20 is disposed in the fan flow channel 11; the motor 30 includes a motor body 31 and a motor shaft 32 connected to each other. The motor body 31 is disposed on one side of the volute 10, and the motor shaft 32 is inserted into the fan flow channel 11 and is connected to the blower wheel 20 in a driving connection; the heat insulation material 40 is disposed between the motor body 31 and the volute 10, and the heat insulation material 40 is configured to block the heat in the fan flow channel 11 from being transferred to the motor body 31.

[0050] In this embodiment, the air supply device 100 is applied in the gas water heater 1000, which also includes a water heater body 200. The air supply device 100 is connected inside the water heater body 200. The water heater body 200 refers to the combustion body of the gas water heater 1000, which has structures such as a combustion heat exchange chamber 220 and a main heat exchanger 230. The combustion heat exchange chamber 220 refers to a frame structure with internal chambers; optionally, it can be a cylindrical frame, a rectangular frame, or some other shaped frame structure. Optionally, a burner can be installed inside or outside the combustion heat exchange chamber 220. Its specific structural type can refer to the burner structure in a conventional gas water heater 1000, and will not be elaborated here. In this embodiment, the main heat exchanger 230 is a water-gas heat exchanger. Its inlet end is used to connect to the inlet water pipe, and its outlet end is used to connect to the outlet water pipe. The specific heat exchanger type can refer to the heat exchanger structure in a conventional ordinary gas water heater 1000, such as a bare tube heat exchanger, a tube-fin heat exchanger, a plate heat exchanger, a shell-and-tube heat exchanger, etc.

[0051] The volute 10 refers to the shell with a fan flow channel 11 formed inside. The fan flow channel 11 has an air inlet end and an air outlet end. The air outlet end of the fan flow channel 11 is connected to the air inlet 201 of the combustion heat exchange chamber 220, or the air outlet end of the fan flow channel 11 is connected to the air inlet 201 of the combustion heat exchange chamber 220.

[0052] When the gas water heater 1000 is a forced-blowing type, the air outlet of the fan flow channel 11 is connected to the air inlet 201 of the combustion heat exchange chamber 220. The motor shaft 32 of the motor 30 drives the blower wheel 20 to rotate. The suction force of the blower wheel 20 causes hot air to enter the fan flow channel 11 from the air inlet and then blow it from the air outlet to the air inlet 201 of the combustion heat exchange chamber 220, so that it is blown into the combustion heat exchange chamber 220 from the air inlet 201 to mix with the gas and burn.

[0053] When the gas water heater 1000 is a forced-draft type, the air outlet of the fan flow channel 11 is connected to the air inlet 201 of the combustion heat exchange chamber 220. The motor shaft 32 of the motor 30 drives the blower wheel 20 to rotate. The suction force of the blower wheel 20 causes hot air to be drawn from the air inlet 201 into the combustion heat exchanger to mix with the gas and burn. The flue gas generated after combustion enters the fan flow channel 11 from the air inlet and is then discharged to the outside from the air outlet or discharged to the flue pipe.

[0054] In practical applications, the motor 30 can be installed on one side of the volute housing 10 along the axial direction, on one side of the volute housing 10 along the radial direction, or in other positions on the volute housing 10. The method of installing the motor 30 on the volute housing 10 can be determined according to specific circumstances, such as by screw connection, snap-fit ​​connection, etc.

[0055] The heat insulation material component 40 refers to the structural component that can block heat transfer, so as to reduce the heat transfer in the fan flow channel 11 to the motor body 31 and avoid the motor 30 from overheating.

[0056] In practical applications, the specific fixing method of the heat insulation material component 40 can be determined according to the specific situation. For example, it can be fixed to the motor body 31 or the volute 10 by adhesive bonding, or by screw connection, crimping, snap-fit, etc. The specific structural shape of the heat insulation material component 40 can also be determined according to the actual situation. For example, it can be adapted to the shape of the surface of the motor body 31 near the volute 10, or it can be adapted to the shape of the surface of the volute 10 near the motor body 31, or it can be other shapes, etc. The specific material of the heat insulation material component 40 can also be determined according to the specific situation. For example, it can be ceramic fiber cotton, glass fiber cotton, polyester heat insulation cotton, silicate heat insulation cotton, silicate heat insulation cotton, aerogel material, or other materials, as long as it can block heat transfer.

[0057] In summary, the air supply device 100 of this invention is applied to a gas water heater 1000. By adding a heat insulation material 40 between the motor body 31 and the volute 10, when the intake air enters the whole frame in the form of hot air, the fan wheel 20 is driven by the motor 30 to rotate in the fan flow channel 11 of the volute 10, so as to send the hot air into the combustion heat exchange chamber 220 of the gas water heater 1000 for combustion. During this process, the hot air or the flue gas after combustion will flow through the fan flow channel 11 of the volute 10. The heat in the fan flow channel 11 can be blocked by the heat insulation material 40 to reduce the heat transfer from the fan flow channel 11 to the motor body 31, which can prevent the motor 30 from overheating and prevent the motor 30 from losing its operating efficiency or even being damaged. At the same time, by adding a heat insulation material 40 between the motor body 31 and the volute 10, the shaft length of the motor 30 will not increase or the dynamic balance will deteriorate, so the problem of the motor 30's performance degradation can also be solved.

[0058] Please see Figures 1 to 4 In one embodiment of this application, the cross-sectional area of ​​the heat insulation material 40 is greater than or equal to the cross-sectional area of ​​the motor body 31.

[0059] This configuration allows the insulation material 40 to cover most or all of the surface of the motor body 31 near the volute 10, reducing the transfer of heat from the space around the insulation material 40 to the motor body 31 within the fan flow channel 11, thus improving the effectiveness of the insulation material 40 in blocking heat transfer to the motor body 31.

[0060] In this embodiment, the motor 30 can be installed on one side of the volute 10 in the axial direction so that the motor shaft 32 is aligned with the axial direction of the volute 10. The cross-section of the heat insulation material 40 and the cross-section of the motor body 31 are both cut from a direction perpendicular to the motor shaft 32.

[0061] Please see Figures 1 to 4 In one embodiment of this application, the projection of the motor body 31 on the volute 10 falls within the projection range of the heat insulation material 40 on the volute 10.

[0062] This configuration allows the heat insulation material 40 to cover the entire surface of the motor body 31 near the volute 10, further reducing the transfer of heat from the space around the heat insulation material 40 to the motor body 31 within the fan flow channel 11, and further improving the effect of the heat insulation material 40 in blocking heat transfer to the motor body 31.

[0063] Please see Figure 3 , Figure 5 In one embodiment of this application, the heat insulation material 40 is a heat insulation ring, and the motor shaft 32 passes through the heat insulation ring.

[0064] In this embodiment, a through hole can be made in the heat insulation material 40. The through hole extends from the side surface of the heat insulation material 40 closest to the motor body 31 to the side surface furthest from the motor body 31, so that the heat insulation material 40 forms a ring-shaped heat insulation ring structure. This allows the motor shaft 32 to pass through the heat insulation ring and be inserted into the fan flow channel 11 of the volute 10. This design ensures that the heat insulation material 40 will not interfere with the motor shaft 32, and can effectively block the heat transfer in the fan flow channel 11 to the motor body 31.

[0065] In one embodiment, a boss is provided on the side of the motor body 31 near the volute 10. The inner cavity of the boss is used to install bearings. The heat insulation ring can be directly sleeved on the outer periphery of the boss to avoid the boss. Alternatively, part of the heat insulation ring can also cover the peripheral wall surface of the boss and the platform surface of the boss near the volute 10, which can reduce the heat in the fan flow channel 11 from the through hole on the inner side of the heat insulation ring to the motor body 31, thereby improving the effect of the heat insulation ring in blocking the heat transfer to the motor body 31.

[0066] Please see Figures 1 to 5 In one embodiment of this application, the heat insulation material 40 is at least one of heat insulation cotton and aerogel material.

[0067] With this configuration, using at least one of the insulation cotton and aerogel materials as the insulation material 40, both insulation performance and cost of use can be considered simultaneously.

[0068] It should be noted that aerogel material components refer to material components made by adding aerogel powder to the base material, using thermal insulation cotton as the base material. The amount of aerogel powder added can be determined according to the specific application. When a thermal insulation material component 40 with better thermal insulation effect is required, the amount of aerogel powder used can be increased accordingly.

[0069] In practical applications, the thermal insulation material component 40 can be made of one or at least two layers of thermal insulation cotton; or the thermal insulation material component 40 can be made of one or at least two layers of aerogel material; or the thermal insulation material component 40 can be made of one or at least two layers of thermal insulation cotton and one or at least two layers of aerogel material.

[0070] Please see Figure 3 , Figure 4 In one embodiment of this application, the heat insulation material 40 has a first side 41 and a second side 42 facing each other. The first side 41 abuts against the side surface of the volute 10 near the motor body 31, and the second side 42 abuts against the side surface of the motor body 31 near the volute 10.

[0071] This configuration prevents heat from flowing from the first side 41 of the insulation material 40 to the motor body 31 through the gap between the insulation material 40 and the volute 10, and also prevents heat from flowing from the second side 42 of the insulation material 40 to the motor body 31 through the gap between the insulation material 40 and the motor body 31, thereby further improving the effect of the insulation material 40 in blocking heat transfer to the motor body 31.

[0072] Please see Figure 4 In one embodiment of this application, the volute 10 is provided with an installation port 12 on the side near the motor body 31. The installation port 12 is configured to allow the impeller 20 to be installed into the fan flow channel 11 and to allow the motor shaft 32 to be inserted into the fan flow channel 11. The heat insulation material 40 is covered on the installation port 12.

[0073] With this configuration, due to the large size of the blower wheel 20, in order to facilitate its installation into the fan flow channel 11 of the volute 10, this embodiment provides an installation port 12 on the side of the volute 10 near the motor body 31. During assembly, the blower wheel 20 can be smoothly inserted into the fan flow channel 11 of the volute 10 through the installation port 12. This also facilitates the insertion of the motor shaft 32 into the fan flow channel 11 through the installation port 12 for smooth connection with the blower in the fan flow channel 11. Because the installation port 12 is large, heat in the fan flow channel 11 can easily flow from the installation port 12 to the motor body 31. Therefore, this embodiment covers the installation port 12 of the volute 10 with a heat-insulating material 40, sealing off all other positions of the installation port 12 except for the position corresponding to the motor shaft 32. This reduces the flow of heat from the fan flow channel 11 from the installation port 12 to the motor body 31, thereby further preventing the motor 30 from overheating.

[0074] Please see Figure 3 , Figure 4 In one embodiment of this application, the heat insulation material 40 is bonded to the volute 10 and / or the motor body 31.

[0075] This configuration, which uses adhesive bonding to fix the heat insulation material 40 to the volute 10 and / or the motor body 31, can improve the reliability of fixing the heat insulation material 40 between the volute 10 and the motor body 31. Compared with screw connections or other connection methods, the adhesive bonding method used in this embodiment provides better sealing between the heat insulation material 40 and the motor body 31 and the volute 10, resulting in better heat insulation effect.

[0076] Optionally, one side surface of the heat insulation material 40 is bonded to the side of the volute 10 near the motor body 31; or, one side surface of the heat insulation material 40 is bonded to the side of the motor body 31 near the volute 10; or, the opposite two sides of the heat insulation material 40 are bonded to the side of the volute 10 near the motor body 31 and the side of the motor body 31 near the volute 10, respectively.

[0077] Please see Figure 4 In one embodiment of this application, the thickness of the heat insulation material 40 is defined as W, which satisfies: 1mm≤W≤10mm.

[0078] When the thickness of the insulation material 40 is too small, its heat-blocking effect will be poor, causing heat in the fan flow channel 11 to pass through the insulation material 40 and affect the motor 30. Conversely, when the thickness of the insulation material 40 is too large, the shaft length of the motor 30 will increase, and the dynamic balance will deteriorate, leading to a decrease in the maximum speed of the air supply equipment 100 and ultimately a decline in its performance. Therefore, this embodiment controls the thickness of the insulation material 40 between 1mm and 10mm, ensuring the heat-blocking effect of the insulation material 40 while avoiding an excessively long shaft length of the motor 30 and deteriorating dynamic balance, thus guaranteeing the performance of the air supply equipment 100.

[0079] As examples, the thickness W of the insulation material component 40 is specifically 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10mm, etc.

[0080] Please see Figure 1 , Figure 2 In one embodiment of this application, a mounting part 311 is provided on the periphery of the motor body 31, and the mounting part 311 is connected to the volute 10.

[0081] With this configuration, the motor body 31 can be connected to the volute 10 using the mounting part 311, so as to achieve reliable installation between the motor 30 and the volute 10.

[0082] In one embodiment, the mounting part 311 is a mounting ear provided on the periphery of the motor body 31. The mounting part 311 is provided with a first connecting hole, and the volute 10 is provided with a second connecting hole. By using screws or other connecting parts 312 to pass through the first connecting hole and the second connecting hole, the connection between the mounting part 311 and the volute 10 can be realized.

[0083] In order to improve the connection reliability between the motor 30 and the volute 10, in one embodiment of this application, a plurality of spaced mounting portions 311 can be provided on the periphery of the motor body 31 to connect with the volute 10 using a plurality of mounting portions 311.

[0084] Please see Figures 6 to 7 The present invention also proposes a gas water heater 1000, which includes a water heater body 200 and a ventilation device 100. The specific structure of the ventilation device 100 is as described in the above embodiments. Since the gas water heater 1000 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0085] The water heater body 200 includes an outer shell 210, a combustion heat exchange chamber 220, and a main heat exchanger 230. The combustion heat exchange chamber 220 is located inside the outer shell 210, and the main heat exchanger 230 is located inside the combustion heat exchange chamber 220. The air supply device 100 is located inside the outer shell 210 and is configured to introduce external air and / or gas into the combustion heat exchange chamber 220 through the fan flow channel 11.

[0086] Understandably, when the intake air enters the casing 210 in the form of hot air, it drives the blower wheel 20 to rotate in the fan channel 11 of the volute 10 under the drive of the motor 30, so as to send the hot air into the combustion heat exchange chamber 220 for combustion. During this process, the hot air or the flue gas after combustion will flow through the fan channel 11 of the volute 10. The heat in the fan channel 11 can be blocked by the heat insulation material 40 to reduce the heat transfer from the fan channel 11 to the motor body 31, which can prevent the motor 30 from overheating and prevent the motor 30 from losing its operating efficiency or even being damaged. At the same time, by adding the heat insulation material 40 between the motor body 31 and the volute 10, the shaft length of the motor 30 will not become longer or the dynamic balance will become worse. Therefore, it can also solve the problem of the motor 30's performance degradation.

[0087] Please see Figures 6 to 7 In one embodiment of this application, the combustion heat exchange chamber 220 is provided with an air inlet 201 and a smoke outlet 202; the air outlet of the air supply device 100 is connected to the air inlet 201, or the air inlet of the air supply device 100 is connected to the smoke outlet 202.

[0088] When the gas water heater 1000 is a forced-draft model, please refer to [link / reference]. Figure 6 The air outlet of the air supply device 100 is connected to the air inlet 201 of the combustion heat exchange chamber 220. The motor shaft 32 of the motor 30 drives the air supply wheel 20 to rotate. The suction force of the rotating air supply wheel 20 causes hot air to enter the fan flow channel 11 from the air inlet and then blow it from the air outlet to the air inlet 201 of the combustion heat exchange chamber 220 so that it can be blown into the combustion heat exchange chamber 220 from the air inlet 201 to mix with the gas and burn.

[0089] When the gas water heater 1000 is a forced-draft model, please refer to [link / reference]. Figure 7 The air outlet of the air supply device 100 is connected to the air inlet 201 of the combustion heat exchange chamber 220. The motor shaft 32 of the motor 30 drives the air supply wheel 20 to rotate. The suction force of the rotating air supply wheel 20 draws hot air from the air inlet 201 into the combustion heat exchanger to mix with the gas and burn. The flue gas generated after combustion enters the fan flow channel 11 from the air inlet and is then discharged to the outside from the air outlet or discharged to the flue pipe.

[0090] Please see Figures 6 to 7In one embodiment of this application, the water heater body 200 further includes a gas-to-gas heat exchanger 240, which has an air inlet channel 203 and a smoke exhaust channel 204. The air outlet end of the air inlet channel 203 is connected to the air inlet end of the air supply device 100, so that the external air introduced from the air inlet channel 203 is transported to the air inlet 201 through the fan flow channel 11. The air inlet end of the smoke exhaust channel 204 is connected to the smoke outlet 202, so that the flue gas drawn from the smoke outlet 202 passes through the smoke exhaust channel 204. 04. The air is discharged to the outside; or, the outlet end of the air intake passage 203 is connected to the air inlet 201 so that the external air introduced from the air intake passage 203 is delivered to the air inlet 201; the air intake end of the smoke exhaust passage 204 is connected to the air outlet end of the air supply device 100 so that the flue gas drawn from the smoke outlet 202 is discharged to the outside through the fan flow channel 11 from the smoke exhaust passage 204; the air-to-air heat exchanger 240 is configured to heat the air flowing through the air intake passage 203 with the flue gas flowing through the smoke exhaust passage 204.

[0091] With this configuration, by incorporating a gas-to-gas heat exchanger 240, which has an inlet channel 203 and an exhaust channel 204 connected in a heat exchange manner, the flue gas, after undergoing a first heat exchange in the combustion heat exchange chamber 220, will undergo a second heat exchange with the cold air inlet channel 203 when it is discharged to the outside through the exhaust channel 204. This allows the heat in the flue gas to be further recovered into the intake air, and then enters the combustion heat exchange chamber 220 from the air inlet 201 to mix and burn with the gas, thereby improving combustion efficiency and achieving the goal of improving the energy efficiency of the gas water heater 1000. At the same time, compared with the method of using a condenser heat exchanger to preheat water and recover heat in related technologies, the gas-to-gas heat exchanger 240 in this embodiment is less likely to produce condensate, eliminating the need for additional design for condensate treatment, thus saving the need for a condensate treatment device and simplifying the overall structure.

[0092] In one embodiment, the gas-to-gas heat exchanger 240 may include a first tube 241, a second tube 242, and a gas-to-gas heat exchanger 243. The second tube 242 is sleeved on the first tube 241. The inner cavity of the first tube 241 is formed as one of an air inlet channel 203 and a smoke exhaust channel 204. The gap between the first tube 241 and the second tube 242 is formed as the other of the air inlet channel 203 and the smoke exhaust channel 204.

[0093] In this embodiment, based on the first tube body 241 and the second tube body 242 of the sleeve design, a gas-to-gas heat exchanger 243 is added. The first flow channel of the gas-to-gas heat exchanger 243 is connected to the flue gas passage 204, and the second flow channel is connected to the air inlet passage 203. The flue gas in the first flow channel can exchange heat with the air in the second flow channel to enhance the overall heat exchange efficiency of the gas-to-gas heat exchanger 240, allowing the air to recover more heat from the flue gas and further improve the energy efficiency of the gas water heater 1000. Optionally, the gas-to-gas heat exchanger 243 can be a plate heat exchanger, a shell-and-tube heat exchanger, a spiral tube heat exchanger, an immersed serpentine tube heat exchanger, a shell-and-tube heat exchanger, etc.

[0094] In practical applications, the specific installation location of the gas-to-gas heat exchanger 243 can be determined according to the actual situation. For example, the gas-to-gas heat exchanger 243 can be installed on the outer casing 210. Specifically, the gas-to-gas heat exchanger 243 can be installed on the outside of the outer casing 210, installed inside the outer casing 210, or penetrate the outer casing 210, with part of it on the outside and part of it inside the outer casing 210. Of course, the gas-to-gas heat exchanger 243 can also be installed on the first tube 241 and the second tube 242.

[0095] In practical applications, the specific structural design of the air intake channel 203 and the smoke exhaust channel 204 can be determined according to the actual situation. For example, it can be a sleeve structure with two airflow heat exchange channels, or it can be two independent airflow channels.

[0096] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An air supply device, characterized in that, include: The volute is equipped with a fan flow channel; An air impeller is disposed within the fan flow channel; The motor includes a motor body and a motor shaft connected together. The motor body is located on one side of the volute, and the motor shaft is inserted into the fan flow channel and is connected to the blower wheel in a drive connection. A heat insulation material is disposed between the motor body and the volute, and the heat insulation material is configured to block the heat transfer in the fan flow channel to the motor body.

2. The air supply device as described in claim 1, characterized in that, The cross-sectional area of ​​the heat insulation material is greater than or equal to the cross-sectional area of ​​the motor body.

3. The air supply device as described in claim 2, characterized in that, The projection of the motor body on the volute falls within the projection range of the heat insulation material on the volute.

4. The air supply device as described in any one of claims 1 to 3, characterized in that, The heat insulation material is a heat insulation ring, and the motor shaft passes through the heat insulation ring.

5. The air supply device as described in any one of claims 1 to 3, characterized in that, The thermal insulation material is at least one of thermal insulation cotton and aerogel material. And / or, if the thickness of the thermal insulation material is defined as W, then the following condition is met: 1mm≤W≤10mm; And / or, the thermal insulation material is bonded to the volute and / or the motor body.

6. The air supply device as described in any one of claims 1 to 3, characterized in that, The heat insulation material has a first side and a second side, the first side abutting against the surface of the volute near the motor body, and the second side abutting against the surface of the motor body near the volute.

7. The air supply device as described in claim 6, characterized in that, The volute has an installation port on the side near the motor body. The installation port is configured to allow the blower wheel to be installed into the fan flow channel and to allow the motor shaft to be inserted into the fan flow channel. The heat insulation material is covered on the installation port.

8. The air supply device as described in any one of claims 1 to 3, characterized in that, The motor body has a mounting part on its periphery, and the mounting part is connected to the volute.

9. A gas water heater, characterized in that, include: The water heater body includes an outer shell, a combustion heat exchange chamber, and a main heat exchanger. The combustion heat exchange chamber is located inside the outer shell, and the main heat exchanger is located inside the combustion heat exchange chamber. The air supply device as described in any one of claims 1 to 8, disposed within the housing, is configured to introduce external air and / or fuel gas into the combustion heat exchange chamber through the fan flow channel.

10. The gas water heater as described in claim 9, characterized in that, The water heater body also includes: The air-to-air heat exchanger has an air inlet channel and an exhaust channel. The air outlet end of the air inlet channel is connected to the air inlet end of the air supply equipment so that the external air introduced from the air inlet channel is transported to the air inlet through the fan flow channel. The air inlet end of the exhaust channel is connected to the exhaust outlet so that the flue gas drawn from the exhaust outlet is discharged to the outside through the exhaust channel. Alternatively, the air outlet of the air intake channel is connected to the air inlet so that external air introduced from the air intake channel is delivered to the air inlet; the air inlet of the smoke exhaust channel is connected to the air outlet of the air supply device so that the smoke drawn from the smoke outlet is discharged outward from the smoke exhaust channel through the fan flow channel. The gas-to-gas heat exchanger is configured to heat the air flowing through the air intake passage with the flue gas flowing through the exhaust passage.

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