Air-cooling structure, air-cooled burner with the same and air-cooling control method

Abstract

The present application relates to the technical field of burner, and particularly discloses a wind cooling structure, a burner with the wind cooling structure and a wind cooling control method of the burner, which comprises: an air inlet plate arranged in the burner, the air inlet plate separates the inside of the burner into a combustion chamber and a wind chamber arranged in an upper and lower mode; a partition plate arranged on one side of the inner wall of the combustion chamber, the partition plate and the inner wall of the combustion chamber form a wind cooling channel; and the airflow formed in the wind chamber enters the wind cooling channel through the air inlet plate, and a first heat dissipation airflow for heat dissipation of the side wall of the burner is formed in the wind cooling channel. By adding the partition plate in the combustion chamber, a part of the airflow provided by the air blower can enter from the bottom of the wind cooling channel and then be discharged from the top of the wind cooling channel into the combustion chamber, the airflow formed by the air blower is fully utilized to realize wind cooling heat dissipation, and the airflow discharged from the top of the wind cooling channel can return to the combustion chamber again to provide oxygen required for combustion, thereby realizing cyclic utilization.

Description

Technical Field

[0001] The present invention relates to the technical field of burners, and more particularly to an air-cooling structure, a burner with the air-cooling structure, and an air-cooling control method thereof. Background Art

[0002] The temperature of the burner of a gas water heater is high during operation, and the heat generated by the combustion inside the burner is easily transferred to the outside of the burner, posing a safety hazard. In the prior art, water cooling is usually performed by winding a pipe around the outer wall of the burner to achieve the effect of cooling the outer wall of the burner. The above cooling method requires winding the pipe, and the structure is relatively complex. There is also an air cooling method for cooling the outer wall of the burner. Generally, the side wall of the burner is set as a double-layer structure, the double-layer structure forms an air cooling channel, and then an additional heat dissipation airflow (usually air) is introduced into the air cooling channel, and then the heat dissipation airflow is discharged from the air cooling channel to the outside of the burner. This method achieves heat dissipation of the burner by air cooling, but the additional heat dissipation airflow is directly discharged to the outside of the burner without being recycled. Therefore, it is necessary to propose an air cooling structure and a burner with an air cooling structure and an air cooling control method thereof to at least partially solve the problems existing in the prior art. Summary of the Invention

[0003] The Summary of the Invention introduces a series of simplified concepts that will be further described in the Detailed Description of the Invention. The Summary of the Invention is not intended to limit the key features and essential features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0004] In order to at least partially solve the above problems, the present invention provides an air cooling structure, including: an air inlet plate arranged inside the burner, the air inlet plate divides the interior of the burner into a combustion chamber and an air chamber arranged up and down; a partition plate arranged on one side of the inner wall of the combustion chamber, the partition plate and the inner wall of the combustion chamber form an air cooling channel; the air flow formed in the air chamber enters the air cooling channel through the air inlet plate, and forms a first heat dissipation airflow in the air cooling channel for dissipating the heat of the side wall of the burner.

[0005] Preferably, an air outlet is provided at the top of the air-cooling channel, and an inclined air guide plate is provided above the air outlet, so that the airflow discharged from the air outlet is guided into the combustion chamber through the air guide plate.

[0006] Preferably, a plurality of heat dissipation protrusions are arranged on a side of the partition close to the inner wall of the combustion chamber.

[0007] Preferably, the combustion chamber is provided with an air inlet cavity on the outer side, the outer side wall of the air inlet cavity is provided with a first air inlet hole communicated with the air supply part, and the inner side wall of the air inlet cavity is provided with a plurality of second air inlet holes arranged uniformly; the air supply part selectively introduces air into the air inlet cavity, and the air enters the air cooling channel through the second air inlet holes to form a second heat dissipation air flow.

[0008] Preferably, the temperature sensor for detecting the temperature of the outer wall of the combustion chamber and the control part in communication with the air supply part and the temperature sensor are further included; the control part controls the air supply part to selectively introduce air into the air inlet cavity according to the current ambient temperature and the temperature of the outer wall of the combustion chamber detected by the temperature sensor.

[0009] Preferably, the control of the control part on the air supply part to selectively introduce air into the air inlet cavity includes:

[0010] When the side wall of the combustor is cooled by the first heat dissipation air flow, if the current ambient temperature is less than or equal to the maximum temperature of the air flow, and the temperature of the outer wall of the combustion chamber is less than the preset temperature of the outer wall of the combustion chamber, the control part controls the air supply part to be inoperative, and the side wall of the combustor continues to be cooled by the first heat dissipation air flow.

[0011] When the side wall of the combustor is cooled by the first heat dissipation air flow, if the current ambient temperature is less than or equal to the maximum temperature of the air flow, and the preset temperature of the outer wall of the combustion chamber is less than or equal to the temperature of the outer wall of the combustion chamber and less than the limit temperature of the outer wall of the combustion chamber, the control part controls the air supply part to perform air supply work at a first gear, introduces air into the air inlet cavity, and forms a second heat dissipation air flow in the air cooling channel to cool the side wall of the combustor together with the first heat dissipation air flow.

[0012] When the side wall of the combustor is cooled by the first heat dissipation air flow, if the current ambient temperature is greater than the maximum temperature of the air flow, and the preset temperature of the outer wall of the combustion chamber is less than or equal to the temperature of the outer wall of the combustion chamber and less than the limit temperature of the outer wall of the combustion chamber, the control part controls the air supply part to perform air supply work at a second gear, introduces air into the air inlet cavity, and forms a second heat dissipation air flow in the air cooling channel to cool the side wall of the combustor together with the first heat dissipation air flow.

[0013] Preferably, when the control part controls the air supply part to perform air supply work at the first gear, if the current ambient temperature is greater than the maximum temperature of the air flow, and the preset temperature of the outer wall of the combustion chamber is less than or equal to the temperature of the outer wall of the combustion chamber and less than the limit temperature of the outer wall of the combustion chamber, the control part controls the air supply part to perform air supply work at the second gear.

[0014] When the control part controls the air supply part to perform air supply work at the second gear, if the current ambient temperature is greater than the maximum temperature of the air flow, and the preset temperature of the outer wall of the combustion chamber is less than or equal to the temperature of the outer wall of the combustion chamber and less than the limit temperature of the outer wall of the combustion chamber at all times within a preset time, the control part controls the combustor to stop working.

[0015] The application discloses a burner with a wind cooling structure.

[0016] The application discloses a wind cooling control method of a burner with a wind cooling structure.

[0017] When the side wall of the burner is cooled by the first cooling airflow, if the current ambient temperature is less than or equal to the maximum temperature of the airflow, and the preset temperature of the outer wall of the combustion chamber is less than the temperature of the outer wall of the combustion chamber and less than the limit temperature of the outer wall of the combustion chamber, the second cooling airflow in the first gear is supplemented to the wind cooling channel, and the side wall of the burner is cooled by the first cooling airflow and the second cooling airflow in the first gear.

[0018] When the side wall of the burner is cooled by the first cooling airflow, if the current ambient temperature is less than or equal to the maximum temperature of the airflow, and the preset temperature of the outer wall of the combustion chamber is less than the temperature of the outer wall of the combustion chamber and less than the limit temperature of the outer wall of the combustion chamber, the second cooling airflow in the first gear is supplemented to the wind cooling channel, and the side wall of the burner is cooled by the first cooling airflow and the second cooling airflow in the first gear.

[0019] When the side wall of the burner is cooled by the first cooling airflow, if the current ambient temperature is greater than the maximum temperature of the airflow, and the preset temperature of the outer wall of the combustion chamber is less than the temperature of the outer wall of the combustion chamber and less than the limit temperature of the outer wall of the combustion chamber, the second cooling airflow in the second gear is supplemented to the wind cooling channel, and the side wall of the burner is cooled by the first cooling airflow and the second cooling airflow in the second gear.

[0020] When the second cooling airflow in the first gear is supplemented to the wind cooling channel, if the current ambient temperature is greater than the maximum temperature of the airflow, and the preset temperature of the outer wall of the combustion chamber is less than the temperature of the outer wall of the combustion chamber and less than the limit temperature of the outer wall of the combustion chamber, the second cooling airflow in the second gear is supplemented to the wind cooling channel (5).

[0021] When the second cooling airflow in the second gear is supplemented to the wind cooling channel, if the current ambient temperature is greater than the maximum temperature of the airflow, and the preset temperature of the outer wall of the combustion chamber is less than the temperature of the outer wall of the combustion chamber and less than the limit temperature of the outer wall of the combustion chamber within the preset time, the burner is controlled to stop working.

[0022] Preferably, the maximum temperature of the airflow is determined by the following method.

[0023] Step 1, the burner with the wind cooling structure is operated for n times, and the ambient temperature of the i th operation is denoted as T hi Each operation includes m operation conditions, and the temperature T wi of the outer wall of the combustion chamber is obtained during each operation.

[0024] Step 2, if the temperature of the outer wall of the combustion chamber under the m operation conditions during the i th operation satisfies T wiIf T wi If T

[0025] If T w(i-1) If T hi If T w(i-1) If T hi If T

[0026] If T w(i-1) If T h(i-1) If T w(i-1) If T hi If T

[0027] Compared with the prior art, the present application has at least the following beneficial effects:

[0028] The air-cooled structure, the air-cooled burner with the air-cooled structure and the air-cooled control method of the air-cooled burner provided by the present application can fully utilize the air flow formed by the air blower to achieve air-cooled heat dissipation, and the air flow discharged from the top of the air-cooled channel can return to the combustion chamber again to provide oxygen required for combustion, thereby achieving recycling.

[0029] The other advantages, objects and features of the air-cooled structure, the air-cooled burner with the air-cooled structure and the air-cooled control method of the air-cooled burner provided by the present application will be embodied partly through the following description and partly by those skilled in the art through research and practice of the present application. DETAILED DESCRIPTION

[0030] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the present application and explain the principles of the present application, and do not constitute a limitation of the present application. In the drawings:

[0031] Figure 1 It is a perspective view of the air-cooled structure according to the present application;

[0032] Figure 2 It is a sectional view of the air-cooled structure according to the present application;

[0033] Figure 3A structure diagram of the baffle in the air-cooled structure according to the present application;

[0034] Figure 4 A structure diagram of the air-cooled structure according to the present application;

[0035] Figure 5 A structure diagram of the vertical cross section of the air inlet cavity and the air-cooled channel in the air-cooled structure according to the present application;

[0036] Figure 6 A structure diagram of the horizontal cross section of the air inlet cavity in the air-cooled structure according to the present application. DETAILED DESCRIPTION

[0037] The present application will be further described in detail below with reference to the accompanying drawings and examples, so that those skilled in the art can implement the present application according to the description.

[0038] It should be understood that the terms such as "have", "contain" and "include" used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0039] As shown in the drawings, Figures 1-2 The present application provides an air-cooled structure, comprising: an air inlet plate 1 arranged inside a burner, which separates the inside of the burner into a combustion chamber 2 and an air chamber 3 arranged one above the other; a baffle 4 arranged on one side of the inner wall of the combustion chamber 2, which forms an air-cooled channel 5 with the inner wall of the combustion chamber 2; and air flow formed in the air chamber 3 enters the air-cooled channel 5 through the air inlet plate 1, forming a first heat dissipation air flow for dissipating heat from the side wall of the burner in the air-cooled channel 5.

[0040] A blower is installed at the bottom of the air chamber 3 to provide air flow to the air chamber 3, and a plurality of fire bars 12 are arranged in the combustion chamber 2 above the air inlet plate 1 in a spaced-apart manner, and a plurality of ventilation holes 13 are provided on the air inlet plate 1, which can uniformly guide the air flow in the air chamber 3 to the space between adjacent fire bars 12 and the air-cooled channel 5, the air flow guided to the space between adjacent fire bars 12 provides oxygen required for combustion in the combustion chamber 2, and the air flow guided to the air-cooled channel 5 forms a first heat dissipation air flow for dissipating heat from the side wall of the burner.

[0041] Through the above design, the baffle 4 is added in the combustion chamber 2, and a part of the air flow provided by the blower can enter from the bottom of the air-cooled channel 5 and then be discharged from the top of the air-cooled channel 5 into the combustion chamber 2, fully utilizing the air flow formed by the blower to achieve air-cooled heat dissipation, and the air flow discharged from the top of the air-cooled channel 5 can return to the combustion chamber 2 again to provide oxygen required for combustion in the combustion chamber 2, achieving recycling.

[0042] As shown in the drawings, Figure 1 and Figure 4As shown, further, the top of the air cooling channel 5 is provided with an air outlet 6, and the upper side of the air outlet 6 is provided with an air deflector 7 arranged obliquely, and the airflow discharged from the air outlet 6 is guided by the air deflector 7 to enter the combustion chamber 2.

[0043] The airflow for heat dissipation is discharged from the air outlet 6 at the top of the air cooling channel 5, and then under the guiding action of the air deflector 7, can enter into the combustion chamber 2 and mix with the gas in the combustion chamber 2; the bottom of the air cooling channel 5 (the air inlet of the first heat dissipation airflow) is lower than the upper air outlet of the fire row 12, and the air outlet 6 of the first heat dissipation airflow is higher than the upper air outlet of the fire row 12, and when the combustion chamber 2 is burning, the gas is concentrated at the upper air outlet of the fire row 12, and if the oxygen provided is insufficient, the gas cannot be fully combusted, and the unburned gas is discharged from the upper side of the burner along the airflow, which wastes energy, so the first heat dissipation airflow discharged from the air outlet 6 can return to the upper area of the combustion chamber 2 and mix with the unburned gas to supplement oxygen and promote the full combustion of the gas; therefore, the first heat dissipation airflow can not only cool and dissipate heat from the side wall of the burner, but also improve the utilization efficiency of the gas.

[0044] As shown in the Figure 3 In order to further reduce the temperature of the air cooling channel 5 and achieve better heat insulation effect of the partition plate 4 and the inner wall of the combustion chamber 2, a plurality of heat dissipation protrusions 8 are arranged on the side of the partition plate 4 close to the inner wall of the combustion chamber 2.

[0045] The plurality of heat dissipation protrusions 8 can increase the heat dissipation area of the partition plate 4, increase the contact area of the partition plate 4 and the airflow, thereby improving the air cooling and heat dissipation effect of the partition plate 4, and further reducing the heat transfer between the partition plate 4 and the side wall of the combustion chamber 2, thereby achieving better heat insulation effect.

[0046] When the gas water heater is working, the wind speed provided by the blower will change with the set temperature (heating temperature of the gas water heater), and the first heat dissipation airflow formed in the air cooling channel 5 is affected by the wind speed of the blower, so that the flow rate of the first heat dissipation airflow formed in the air cooling channel 5 is limited without changing the set temperature of the gas water heater, thereby affecting the air cooling and heat dissipation effect;

[0047] Based on the above problems, on the basis of the foregoing embodiment, in order to ensure the air cooling and heat dissipation effect, the present application provides a second heat dissipation airflow for compensating the first heat dissipation airflow, which is as follows:

[0048] As shown in the Figure 5 and Figure 6As shown, in one embodiment, the outer side of the combustion chamber 2 is provided with an air inlet cavity 9, the outer side wall of the air inlet cavity 9 is provided with a first air inlet hole 10 in communication with the gas supply part, and the inner side wall of the air inlet cavity 9 is provided with a plurality of uniformly arranged second air inlet holes 11; the gas supply part selectively introduces gas into the air inlet cavity 9, and the gas enters the air cooling channel 5 through the second air inlet hole 11 to form a second heat dissipation airflow.

[0049] The gas supply part is a fan independently arranged relative to the air blower, and is only used to provide the second heat dissipation airflow to the air cooling channel 5 to compensate for the first heat dissipation airflow, so as to achieve better air cooling heat dissipation effect; the air inlet cavity 9 is arranged on the outer side of the combustion chamber 2, and after the gas supply part works, the airflow provided by the gas supply part enters the air inlet cavity 9 from the first air inlet hole 10, and then enters the air cooling channel 5 from the second air inlet hole 11 of the air inlet cavity 9 in a uniform manner. The second air inlet hole 11 is arranged in an inclined manner, and the end in communication with the air cooling channel 5 is higher than the end in communication with the air inlet cavity 9, so that the airflow discharged from the second air inlet hole 11 moves upward in compliance with the air cooling channel 5, the flow rate of the airflow in the air cooling channel 5 is increased, and the amount of gas used for heat dissipation is increased, so that when the first heat dissipation airflow is insufficient to meet the heat dissipation effect of the air cooling channel 5, the first heat dissipation airflow is compensated, so as to achieve better air cooling heat dissipation effect.

[0050] In one embodiment, it further includes a temperature sensor for detecting the temperature of the outer wall of the combustion chamber, and a control part in communication connection with the gas supply part and the temperature sensor; the control part controls the gas supply part to selectively introduce gas into the air inlet cavity 9 according to the current environmental temperature and the temperature of the outer wall of the combustion chamber detected by the temperature sensor.

[0051] In order to improve the accuracy of compensation of the second heat dissipation airflow, the temperature sensor is arranged on the outer wall of the combustion chamber 2 to detect the temperature of the outer wall of the combustion chamber. Since the air blower and the gas supply part both suck gas from the external environment to form an airflow, the temperature of the airflow is the current environmental temperature. Therefore, whether the gas supply part needs to introduce gas into the air inlet cavity 9 is related to the temperature of the outer wall of the combustion chamber and the current environmental temperature (collected by an environmental temperature sensor in communication connection with the control part). Therefore, the control part controls the gas supply part to selectively introduce gas into the air inlet cavity 9 according to the temperature of the outer wall of the combustion chamber and the current environmental temperature.

[0052] In order to improve the accuracy of detection of the temperature of the outer wall of the combustion chamber, a plurality of temperature sensors can be uniformly arranged, and the average value detected by the plurality of temperature sensors is taken as the collected temperature of the outer wall of the combustion chamber.

[0053] Further, the control part controlling the gas supply part to selectively introduce gas into the air inlet cavity 9 includes:

[0054] In the first case, when the side wall of the burner is cooled by the first cooling air flow, if the current ambient temperature is less than or equal to the maximum temperature of the air flow, and the outer wall temperature of the combustion chamber is less than the preset temperature of the outer wall of the combustion chamber, the control unit controls the gas supply unit to stop working, and continues to cool the side wall of the burner by the first cooling air flow.

[0055] The current ambient temperature less than or equal to the maximum temperature of the air flow indicates that, at the current time, the temperature of the first cooling air flow formed by the blower is less than or equal to the maximum temperature of the air flow, and the outer wall temperature of the combustion chamber is less than the preset temperature of the outer wall of the combustion chamber. It is considered that, under the current working condition (the current heating temperature of the gas water heater), only the first cooling air flow is sufficient to form effective cooling for the air cooling channel 5, and the second cooling air flow is not needed to be supplemented by the gas supply unit.

[0056] In the second case, when the side wall of the burner is cooled by the first cooling air flow, if the current ambient temperature is less than or equal to the maximum temperature of the air flow, and the preset temperature of the outer wall of the combustion chamber is less than or equal to the outer wall temperature of the combustion chamber, which is less than the limit temperature of the outer wall of the combustion chamber, the control unit controls the gas supply unit to perform the gas supply work at the first gear, and introduces the gas into the air inlet cavity 9 to form the second cooling air flow in the air cooling channel 5, which cools the side wall of the burner together with the first cooling air flow.

[0057] The current ambient temperature less than or equal to the maximum temperature of the air flow indicates that, at the current time, the temperature of the first cooling air flow formed by the blower is less than or equal to the maximum temperature of the air flow, but the current preset temperature of the outer wall of the combustion chamber is less than or equal to the outer wall temperature of the combustion chamber, which is less than the limit temperature of the outer wall of the combustion chamber. That is, under the current working condition, only the first cooling air flow formed by the blower is insufficient to reduce the outer wall temperature of the combustion chamber to below the preset temperature of the outer wall of the combustion chamber, and the outer wall of the burner will form a high temperature. However, the current ambient temperature is less than or equal to the maximum temperature of the air flow, that is, the second cooling air flow compensated by the gas supply unit performing the gas supply work at the first gear can reduce the outer wall temperature of the combustion chamber to below the preset temperature of the outer wall of the combustion chamber. The first cooling air flow is compensated to improve the gas volume and air flow speed of the air cooling channel 5, and improve the air cooling effect.

[0058] In the third case, when the side wall of the burner is cooled by the first cooling air flow, if the current ambient temperature is greater than the maximum temperature of the air flow, and the preset temperature of the outer wall of the combustion chamber is less than or equal to the outer wall temperature of the combustion chamber, which is less than the limit temperature of the outer wall of the combustion chamber, the control unit controls the gas supply unit to perform the gas supply work at the second gear, and introduces the gas into the air inlet cavity 9 to form the second cooling air flow in the air cooling channel 5, which cools the side wall of the burner together with the first cooling air flow.

[0059] The above-mentioned current ambient temperature > maximum airflow temperature indicates that, at the current moment, the temperature of the first heat dissipation airflow formed by the blower is greater than the maximum airflow temperature. If, at this moment, the preset combustion chamber outer wall temperature ≤ combustion chamber outer wall temperature < combustion chamber outer wall limit temperature, it indicates that under the current operating conditions, it is uncertain whether the combustion chamber outer wall temperature can be lowered by compensating with the second heat dissipation airflow. This is because, although the compensating second heat dissipation airflow can increase the airflow velocity of the air-cooling channel 5, the second heat dissipation airflow is also extracted from the current environment by the air supply unit, that is, the temperature of the second heat dissipation airflow is also greater than the maximum airflow temperature. Therefore, the air supply unit needs to directly perform the air supply work at the second gear, and it is necessary to monitor the changes in the combustion chamber outer wall temperature at any time.

[0060] That is, when the control unit controls the air supply unit to perform air supply work at the second gear, if the current ambient temperature is greater than the maximum temperature of the air flow, and within the preset time, the preset temperature of the outer wall of the combustion chamber is always less than the temperature of the outer wall of the combustion chamber and less than the limit temperature of the outer wall of the combustion chamber, the burner is controlled to stop working; wherein the air flow velocity at the second gear is greater than the air flow velocity at the first gear;

[0061] That is, timing is started at the moment when the air supply unit starts to perform the air supply work in the second gear, and the temperature of the outer wall of the combustion chamber is continuously obtained within the preset time. If the temperature of the outer wall of the combustion chamber drops below the preset temperature of the outer wall of the combustion chamber, the air supply unit performs the air supply work in the second gear. If the temperature of the outer wall of the combustion chamber continuously obtained within the preset time is always the preset temperature of the outer wall of the combustion chamber ≤ the temperature of the outer wall of the combustion chamber < the limit temperature of the outer wall of the combustion chamber, the burner is controlled to stop working to prevent the temperature of the outer wall of the burner from being too high and posing a safety hazard.

[0062] In addition, when the control unit controls the air supply unit to perform the air supply work in the first gear, if the current ambient temperature is greater than the maximum temperature of the airflow, and the preset temperature of the outer wall of the combustion chamber ≤ the temperature of the outer wall of the combustion chamber < the limit temperature of the outer wall of the combustion chamber, then the control unit controls the air supply unit to perform the air supply work in the second gear; the processing method is the same as the third case, and it is necessary to monitor the changes in the temperature of the outer wall of the combustion chamber at any time, which will not be repeated here.

[0063] The maximum temperature of the airflow is predetermined. Further, the method for determining the maximum temperature of the airflow includes:

[0064] Step 1: Run the burner with air cooling structure n times in advance. The ambient temperature of the i-th operation is recorded as T hi Each operation includes m operating conditions, and the combustion chamber wall temperature T is obtained during each operation. wi ; where n≥2;

[0065] Step 2: If during the i-th operation (ambient temperature is T hi ), the combustion chamber wall temperature under m operating conditions all satisfies Twi ≤T1, then step 3 is performed; if at the i-th running, the combustion chamber outer wall temperature of the m running conditions does not meet T wi ≤T1, then step 4 is performed; wherein T1 is a preset temperature of the combustion chamber outer wall;

[0066] Step 3, if T w(i-1) >T1, the environment temperature T hi of the i-th running is taken as the maximum temperature of the gas flow;

[0067] The above T w(i-1) >T1 indicates that at the i-1-th running, the combustion chamber outer wall temperature of the m running conditions does not meet the heat dissipation requirement, while at the i-th running, the combustion chamber outer wall temperature of the m running conditions all meet the requirement (T wi ≤T1), the environment temperature T hi of the i-th running is taken as the maximum temperature of the gas flow (T hi <T h(i-1) );

[0068] If T w(i-1) ≤T1, the i+1-th running is performed at the environment temperature of T hi +ΔT, and step 2 is performed again; wherein ΔT is the environment temperature difference, ΔT=1℃;

[0069] That is, at the i-1-th running and the i-th running, the combustion chamber outer wall temperature of the m running conditions all meet the heat dissipation requirement, which indicates that the environment temperature can be increased again, so the environment temperature is increased to T hi +ΔT for the i+1-th running, and step 2 is performed again to determine the final maximum temperature of the gas flow;

[0070] Step 4, if T w(i-1) ≤T1, the environment temperature T h(i-1) of the i-1-th running is taken as the maximum temperature of the gas flow;

[0071] The above T w(i-1) ≤T1 indicates that at the i-1-th running, the combustion chamber outer wall temperature of the m running conditions all meet the requirement, while at the i-th running, the combustion chamber outer wall temperature of the m running conditions does not meet the requirement (T wi ≤T1), the environment temperature T h(i-1) of the i-1-th running is taken as the maximum temperature of the gas flow (T h(i-1) <T hi );

[0072] If T w(i-1) >T1, the i+1-th running is performed at the environment temperature of T hithe i+1th operation is performed at an ambient temperature of ΔT, and step 2 is performed again to determine the maximum temperature of the air flow.

[0073] That is, the combustion chamber outer wall temperature in the m operation conditions in the i-1th operation and the i th operation does not meet the requirement at least one time, which indicates that the ambient temperature needs to be reduced, so the ambient temperature is reduced to T hi The i+1th operation is performed at an ambient temperature of ΔT, and step 2 is performed again to determine the maximum temperature of the air flow.

[0074] The ambient temperature of each operation is different, and the ambient temperature of the first operation is set to 30℃; the m operation conditions refer to m set temperatures of the gas water heater, that is, m air speeds of the air blower, and only the first heat dissipation air flow formed by the air blower is used to dissipate heat to the air cooling channel 5 in each operation, and the combustion chamber outer wall temperature is obtained, and the combustion chamber outer wall temperature obtained in the i th operation is denoted as T wi .

[0075] By the above method, the maximum temperature of the air flow which is not affected by the operation condition (the set temperature of the gas water heater) when the first heat dissipation air flow formed by the air blower is used for air cooling is determined based on the combustion chamber outer wall temperature, so that when the burner works, the heat dissipation of the first heat dissipation air flow can be obtained by monitoring the ambient temperature and the combustion chamber outer wall temperature, and the influence of the actual working temperature of the burner on the heat dissipation effect does not need to be considered, thereby reducing the control difficulty of the gas supply part, and based on the determined maximum temperature of the air flow, the first heat dissipation air flow formed by the air blower can be used to the greatest extent, the air cooling effect is guaranteed, and the use frequency of the gas supply part is reduced as much as possible, thereby saving electric energy; and by comparing the current ambient temperature with the maximum temperature of the air flow, the heat dissipation of the gas supply part to the burner can be obtained to prevent the burner from overheating, and the use safety is guaranteed.

[0076] A burner with an air cooling structure, which uses the air cooling structure of the present application to dissipate heat.

[0077] The burner with the air cooling structure of the present application can improve the air cooling effect, realize the recycling of the heat dissipation air flow, and save the use of energy.

[0078] An air cooling control method of a burner with an air cooling structure, which uses the air cooling structure of the present application to dissipate heat from the burner, and comprises the following steps:

[0079] The first case is that when the side wall of the burner is cooled by the first cooling air flow, if the current ambient temperature is less than or equal to the maximum temperature of the air flow, and the outer wall temperature of the combustion chamber is less than the preset temperature of the outer wall of the combustion chamber, the second cooling air flow is not needed to be supplemented to the air cooling channel 5, and the side wall of the burner is continuously cooled by the first cooling air flow.

[0080] The current ambient temperature being less than or equal to the maximum temperature of the air flow indicates that at the current time, the temperature of the first cooling air flow formed by the blower is less than or equal to the maximum temperature of the air flow, and the outer wall temperature of the combustion chamber is less than the preset temperature of the outer wall of the combustion chamber, so it is considered that under the current working condition (the current heating temperature of the gas water heater), only the first cooling air flow is sufficient to form effective cooling of the air cooling channel 5, and the second cooling air flow is not needed to be supplemented.

[0081] The second case is that when the side wall of the burner is cooled by the first cooling air flow, if the current ambient temperature is less than or equal to the maximum temperature of the air flow, and the preset temperature of the outer wall of the combustion chamber is less than or equal to the outer wall temperature of the combustion chamber and less than the limit temperature of the outer wall of the combustion chamber, the second cooling air flow under the first gear is supplemented to the air cooling channel 5, and the side wall of the burner is cooled by the first cooling air flow and the second cooling air flow.

[0082] The current ambient temperature being less than or equal to the maximum temperature of the air flow indicates that at the current time, the temperature of the first cooling air flow formed by the blower is less than or equal to the maximum temperature of the air flow, but the current preset temperature of the outer wall of the combustion chamber is less than or equal to the outer wall temperature of the combustion chamber and less than the limit temperature of the outer wall of the combustion chamber, that is, under the current working condition, only the first cooling air flow formed by the blower is insufficient to reduce the outer wall temperature of the combustion chamber to below the preset temperature of the outer wall of the combustion chamber, and the outer wall of the burner will form a high temperature, but the current ambient temperature is less than or equal to the maximum temperature of the air flow, that is, the second cooling air flow supplemented by the first gear can reduce the outer wall temperature of the combustion chamber to below the preset temperature of the outer wall of the combustion chamber, and the first cooling air flow is compensated to improve the air volume and air flow speed of the air cooling channel 5 and improve the air cooling effect.

[0083] The third case is that when the side wall of the burner is cooled by the first cooling air flow, if the current ambient temperature is greater than the maximum temperature of the air flow, and the preset temperature of the outer wall of the combustion chamber is less than or equal to the outer wall temperature of the combustion chamber and less than the limit temperature of the outer wall of the combustion chamber, the second cooling air flow under the second gear is supplemented to the air cooling channel 5, and the side wall of the burner is cooled by the first cooling air flow and the second cooling air flow.

[0084] The above current environment temperature > maximum temperature of the airflow indicates that at the current moment, the temperature of the first heat dissipation airflow formed by the blower is greater than the maximum temperature of the airflow, and if the preset temperature of the combustion chamber outer wall at this time ≤ the combustion chamber outer wall temperature < the combustion chamber outer wall limit temperature, it indicates that under the current working condition, it is uncertain whether the combustion chamber outer wall temperature can be reduced by compensating the second heat dissipation airflow, because although the compensated second heat dissipation airflow can increase the airflow speed of the air cooling channel 5, the second heat dissipation airflow is also extracted from the current environment, that is, the temperature of the second heat dissipation airflow is also greater than the maximum temperature of the airflow, so it is necessary to directly execute the air supply work at the second gear and monitor the change of the combustion chamber outer wall temperature at any time;

[0085] That is, when the second heat dissipation airflow under the second gear is supplemented into the air cooling channel 5, if the current environment temperature > the maximum temperature of the airflow, and the combustion chamber outer wall preset temperature ≤ the combustion chamber outer wall temperature < the combustion chamber outer wall limit temperature at all times within the preset time, the burner is controlled to stop working; wherein the airflow flow rate under the second gear is greater than the airflow flow rate under the first gear;

[0086] That is, the timing is started at the beginning of the execution of the air supply work at the second gear, and the combustion chamber outer wall temperature is continuously acquired within the preset time, if the combustion chamber outer wall temperature drops below the combustion chamber outer wall preset temperature, the air supply part executes the air supply work at the second gear, if the combustion chamber outer wall temperature continuously acquired within the preset time is always the combustion chamber outer wall preset temperature ≤ the combustion chamber outer wall temperature < the combustion chamber outer wall limit temperature, the burner is controlled to stop working, to prevent the high temperature of the burner outer wall and the safety hidden danger.

[0087] In addition, when the second heat dissipation airflow under the first gear is supplemented into the air cooling channel 5, if the current environment temperature > the maximum temperature of the airflow, and the combustion chamber outer wall preset temperature ≤ the combustion chamber outer wall temperature < the combustion chamber outer wall limit temperature, the second heat dissipation airflow under the second gear is supplemented into the air cooling channel 5; the processing method is the same as the third case, and the change of the combustion chamber outer wall temperature needs to be monitored at any time, which will not be described here.

[0088] Further, the determination method of the maximum temperature of the airflow comprises:

[0089] Step 1, the burner with air cooling structure is run n times in advance, and the environment temperature of the i-th running is denoted as T hi Each running includes m running conditions, and the combustion chamber outer wall temperature T wi is acquired at each running; wherein n≥2;

[0090] Step 2, if the combustion chamber outer wall temperature under m running conditions all satisfies T hi at the i-th running (the environment temperature is T wi≤T1, then step 3 is performed; if at the i-th running, the combustion chamber outer wall temperature of the m running conditions does not meet T wi ≤T1, then step 4 is performed; wherein T1 is a preset temperature of the combustion chamber outer wall;

[0091] Step 3, if T w(i-1) >T1, the environment temperature T hi of the i-th running is taken as the maximum temperature of the gas flow;

[0092] The above T w(i-1) >T1 indicates that at the i-1-th running, the combustion chamber outer wall temperature of the m running conditions does not meet the heat dissipation requirement, while at the i-th running, the combustion chamber outer wall temperature of the m running conditions all meet the requirement (T wi ≤T1), the environment temperature T hi of the i-1-th running is taken as the maximum temperature of the gas flow (T hi <T h(i-1) );

[0093] If T w(i-1) ≤T1, the i+1-th running is performed under the environment temperature of T hi +ΔT, and step 2 is performed; wherein ΔT=1℃;

[0094] That is, at the i-1-th running and the i-th running, the combustion chamber outer wall temperature of the m running conditions all meet the heat dissipation requirement, which indicates that the environment temperature can be increased, so the environment temperature is increased to T hi +ΔT for the i+1-th running, and step 2 is performed again to determine the final maximum temperature of the gas flow;

[0095] Step 4, if T w(i-1) ≤T1, the environment temperature T h(i-1) of the i-1-th running is taken as the maximum temperature of the gas flow;

[0096] The above T w(i-1) ≤T1 indicates that at the i-1-th running, the combustion chamber outer wall temperature of the m running conditions all meet the requirement, while at the i-th running, the combustion chamber outer wall temperature of the m running conditions does not meet the requirement (T wi ≤T1), the environment temperature T h(i-1) of the i-1-th running is taken as the maximum temperature of the gas flow (T h(i-1) <T hi );

[0097] If T w(i-1) >T1, the i+1-th running is performed under the environment temperature of T hi -ΔT, and step 2 is performed; wherein ΔT=1℃;

[0098] That is, at the i-1th operation and the ith operation, the combustion chamber outer wall temperature under the m operation conditions is at least one that does not meet the requirement, indicating that the ambient temperature needs to be reduced, so the ambient temperature is reduced to T hi -ΔT, the i+1th operation is performed, and step 2 is performed again to determine the maximum temperature of the air flow.

[0099] Wherein, the ambient temperature of each operation is set to be different, and the ambient temperature of the first operation is set to 30℃; the m operation conditions refer to m set temperatures of the gas water heater, that is, m air speeds of the air blower, and only the first heat dissipation air flow formed by the air blower is used to dissipate heat to the air cooling channel 5 during each operation, and the combustion chamber outer wall temperature is obtained, and the combustion chamber outer wall temperature obtained for the ith time is denoted as T wi .

[0100] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0101] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or communicate with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0102] Although the embodiments of the present application have been disclosed as above, they are not limited only to the applications listed in the specification and embodiments, and can be fully applied to various fields suitable for the present application, and additional modifications can be easily realized by those skilled in the art, and therefore the present application is not limited to specific details and the figures shown and described herein, without departing from the general concept defined by the claims and the equivalent scope.

Claims

1. An air cooling structure, characterized in that: include: An air inlet plate (1) is provided inside the burner, the air inlet plate (1) divides the interior of the burner into a combustion chamber (2) and an air chamber (3) arranged vertically, a blower being installed at the bottom of the air chamber (3) for providing airflow to the air chamber (3); a partition plate (4) is provided on one side of the inner wall of the combustion chamber (2), the partition plate (4) and the inner wall of the combustion chamber (2) forming an air cooling channel (5); the airflow formed in the air chamber (3) enters the air cooling channel (5) through the air inlet plate (1), and forms a first heat dissipation airflow in the air cooling channel (5) for dissipating heat from the side wall of the burner; An air inlet cavity (9) is provided on the outside of the combustion chamber (2); a first air inlet hole (10) communicating with the air supply portion is provided on the outer wall of the air inlet cavity (9); a plurality of evenly arranged second air inlet holes (11) are provided on the inner wall of the air inlet cavity (9); the air supply portion selectively introduces gas into the air inlet cavity (9), and the gas enters the air cooling channel (5) through the second air inlet holes (11) to form a second heat dissipation airflow; It also includes: a temperature sensor for detecting the temperature of the outer wall of the combustion chamber, and a control unit that is communicatively connected to the air supply unit and the temperature sensor; the control unit controls the air supply unit to selectively introduce gas into the air inlet chamber (9) based on the current ambient temperature and the temperature of the outer wall of the combustion chamber detected by the temperature sensor; The control unit controls the air supply unit to selectively introduce gas into the air inlet cavity (9), including: When the first cooling airflow is used to dissipate heat to the side wall of the burner, if the current ambient temperature The maximum temperature of the air flow and the temperature of the outer wall of the combustion chamber When the outer wall of the combustion chamber reaches a preset temperature, the control unit controls the air supply unit to stop working and continues to dissipate heat to the side wall of the burner through the first heat dissipation airflow; When the first cooling airflow is used to dissipate heat to the side wall of the burner, if the current ambient temperature Maximum air flow temperature and preset combustion chamber outer wall temperature When the outer wall of the combustion chamber reaches the limit temperature, the control unit controls the air supply unit to perform the air supply operation at the first gear position, and introduces gas into the air inlet chamber (9), so that a second heat dissipation airflow is formed in the air cooling channel (5), and the second heat dissipation airflow is used together with the first heat dissipation airflow to dissipate heat from the side wall of the burner; When the first cooling airflow is used to dissipate heat to the side wall of the burner, if the current ambient temperature Maximum air flow temperature and preset combustion chamber outer wall temperature When the outer wall of the combustion chamber reaches the limit temperature, the control unit controls the air supply unit to perform the air supply operation at the second gear position, and introduces gas into the air inlet chamber (9), so that a second heat dissipation airflow is formed in the air cooling channel (5), and the second heat dissipation airflow is used together with the first heat dissipation airflow to dissipate heat from the side wall of the burner; When the control unit controls the air supply unit to perform air supply work at the first gear, if the current ambient temperature Maximum air flow temperature and preset combustion chamber outer wall temperature When the outer wall of the combustion chamber reaches the limit temperature, the control unit controls the air supply unit to perform the air supply work at the second gear; When the control unit controls the air supply unit to perform air supply work at the second gear, if the current ambient temperature The maximum temperature of the air flow, and it is always the preset temperature of the combustion chamber outer wall within the preset time When the outer wall of the combustion chamber reaches the limit temperature, the burner is controlled to stop working.

2. The air cooling structure according to claim 1, characterized in that: An air outlet (6) is provided at the top of the air cooling channel (5), and an inclined air guide plate (7) is provided above the air outlet (6). The airflow discharged from the air outlet (6) is guided into the combustion chamber (2) through the air guide plate (7).

3. The air cooling structure according to claim 1, characterized in that: A plurality of heat dissipation protrusions (8) are arranged on one side of the partition plate (4) close to the inner wall of the combustion chamber (2).

4. A burner with an air-cooling structure, characterized in that: The burner adopts the air-cooling structure according to any one of claims 1 to 3 to dissipate heat.

5. A method for controlling air cooling of a burner with an air cooling structure, characterized in that: The air cooling structure according to any one of claims 1 to 3 is used to dissipate heat from the burner, comprising: When the first cooling airflow is used to dissipate heat to the side wall of the burner, if the current ambient temperature The maximum temperature of the air flow and the temperature of the outer wall of the combustion chamber When the outer wall of the combustion chamber reaches a preset temperature, there is no need to add the second heat dissipation airflow to the air cooling channel (5), and the first heat dissipation airflow continues to dissipate heat to the side wall of the burner; When the first cooling airflow is used to dissipate heat to the side wall of the burner, if the current ambient temperature Maximum air flow temperature and preset combustion chamber outer wall temperature When the outer wall of the combustion chamber reaches the limit temperature, the second heat dissipation airflow at the first gear is added to the air cooling channel (5), and the second heat dissipation airflow is used together with the first heat dissipation airflow to dissipate heat from the side wall of the burner; When the first cooling airflow is used to dissipate heat to the side wall of the burner, if the current ambient temperature Maximum air flow temperature and preset combustion chamber outer wall temperature When the outer wall of the combustion chamber reaches the limit temperature, a second heat dissipation airflow at the second gear is added to the air cooling channel (5), and the second heat dissipation airflow is used together with the first heat dissipation airflow to dissipate heat from the side wall of the burner; When the second cooling airflow at the first gear is added to the cooling channel (5), if the current ambient temperature Maximum air flow temperature and preset combustion chamber outer wall temperature When the outer wall of the combustion chamber reaches its limit temperature, the second heat dissipation airflow at the second gear is added to the air cooling channel (5); When the second cooling airflow at the second gear is added to the cooling channel (5), if the current ambient temperature The maximum temperature of the air flow, and it is always the preset temperature of the combustion chamber outer wall within the preset time When the outer wall of the combustion chamber reaches the limit temperature, the burner is controlled to stop working.

6. The air cooling control method for a burner with an air cooling structure according to claim 5, characterized in that: The method for determining the maximum temperature of the airflow includes: Step 1: Run the burner with air cooling structure n times in advance. The ambient temperature of the i-th operation is recorded as Each operation includes m operating conditions, and the temperature of the combustion chamber wall is obtained during each operation. ;in, ; Step 2: If the combustion chamber wall temperature under m operating conditions satisfies the following conditions during the i-th operation: , then execute step 3. If, during the i-th operation, at least one of the combustion chamber wall temperatures under the m operating conditions does not meet , then execute step 4; where, Preset temperature for the outer wall of the combustion chamber; Step 3: If , the ambient temperature of the ith operation As the maximum temperature of the air flow, if , then in Perform the i+1th run at an ambient temperature and execute step 2; wherein, ; Step 4: If , the ambient temperature of the i-1th operation As the maximum temperature of the air flow, if , then in Perform the i+1th run at an ambient temperature and execute step 2; wherein, .

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