Range hood mounting and debugging method

Abstract

The invention discloses a range hood installing and debugging method. The method comprises the following steps that parameters of a smoke pipe assembly and parameters of floors are input into a range hood; the smoke machine sends the parameters of the smoke pipe assembly and the parameters of the floors to a server for calculation; the server calculates a resistance value P of the smoke pipe assembly according to the parameters of the smoke pipe assembly and sends a calculation result to the range hood; the range hood compares the calculated resistance value P of the smoke pipe assembly with a preset pressure threshold value delta P and displays a result: if P is greater than delta P, pipeline installation of the range hood has a problem, and the pipeline needs to be readjusted for P value optimization; if P is smaller than delta P, pipeline installation of the range hood is reasonable; compared with the prior art, according to the range hood installation and debugging method, the server calculates the resistance value P of the smoke pipe assembly on line and issues the calculation result to the range hood and displays the calculation result to the user, installation personnel put forward modification suggestions, the smoke pipe assembly of the range hood is optimized and adjusted under the condition that the user accepts the modification suggestions, the resistance of the smoke pipe is reduced, and the user experience is improved. And the range hood using effect of a user is improved.

Description

Technical Field

[0001] The invention relates to the technical field of range hoods, and in particular to a range hood installation and debugging method. Background Art

[0002] Through the PQ curve characteristics of the motor, we know that when the power of the range hood is fixed, the final output air volume will be inversely proportional to the back pressure. Range hoods generally have an automatic boost cruise function. The principle of this function is to increase the power of the range hood to resist the back pressure, so that under high back pressure, the air volume remains unchanged or decreases within an acceptable range to ensure the user's smoke exhaust effect. However, there are two disadvantages: First, the motor power is limited. When the environmental back pressure exceeds the maximum power of the motor, the air volume will also decrease, making it difficult to ensure the smoke exhaust effect; second, the increase in motor power will lead to an increase in noise, which greatly affects the user's experience. Summary of the invention

[0003] The purpose of the present invention is to provide a range hood installation and debugging method, which is used to solve the above-mentioned technical problems.

[0004] A method for installing and debugging a range hood comprises the following steps:

[0005] Input the parameters of the smoke pipe assembly and the floor parameters into the smoke machine;

[0006] The range hood sends the parameters of the smoke pipe assembly and the parameters of the floor to the server for calculation;

[0007] The server calculates the resistance value P of the smoke tube assembly according to the parameters of the smoke tube assembly and sends the calculation result to the range hood;

[0008] The smoke exhaust fan compares the calculated resistance value P of the smoke tube assembly with the preset pressure threshold ΔP and displays the result:

[0009] If P>ΔP, there is a problem with the pipe installation of the range hood, and the pipe needs to be readjusted to optimize the P value;

[0010] If P<ΔP, the hood pipe installation is reasonable.

[0011] According to one embodiment of the present invention, a smoke pipe assembly includes a smoke pipe, a smoke pipe expansion head and a smoke pipe elbow. The smoke pipe parameters include the number, length, material and diameter of the smoke pipe, the number and local resistance coefficient of the smoke pipe expansion head, the local resistance coefficient of the smoke pipe expansion head is related to the angle and shape of the expansion or contraction of the pipe and the number and local resistance coefficient of the smoke pipe elbow, and the local resistance coefficient of the smoke pipe elbow is related to the angle of the elbow.

[0012] According to one embodiment of the present invention, the pressure value of the smoke pipe assembly P=∑P1 n +∑P2 m +ΣP3i +P4, where P1 is the resistance of the smoke duct, n is the number of smoke ducts; P2 is the resistance of the smoke duct expansion head, m is the number of smoke duct expansion heads; P3 is the resistance of the smoke duct elbow, i is the number of smoke duct elbows, and P4 is the resistance of the floor height.

[0013] According to one embodiment of the present invention, the calculation method of the resistance P1 of the smoke pipe is: P1 = f*(L / D)*(p*V 2 / 2), where: f is the friction coefficient, L is the length of the smoke tube, D is the inner diameter of the smoke tube, p is the air density, and V is the flow velocity;

[0014] The calculation method of the resistance P2 of the smoke tube expansion and contraction head is: P2 = k*(p*V 2 / 2), where: k is the local resistance coefficient, which is related to the angle and shape of the expansion or contraction of the pipeline, p is the air density, and V is the flow velocity;

[0015] The calculation method of the resistance P3 of the smoke pipe elbow is: P3 = w*(p*V 2 / 2), where w is the local resistance coefficient, which is related to the angle of the bend, p is the air density, and V is the flow velocity;

[0016] The calculation method of layer height resistance P4 is: P4 = a*H / L*(p*V 2 / 2), where a is the correction coefficient, H is the total number of floors, L is the number of user floors, p is the air density, and V is the flow velocity.

[0017] According to one embodiment of the present invention, if P>ΔP, when optimizing the P value, the optimized parameters include the length and / or material and / or diameter of the smoke pipe, and / or the expansion or contraction angle and / or shape of the smoke pipe expansion and contraction head, and / or the angle of the smoke pipe elbow.

[0018] According to one embodiment of the present invention, the parameters of the smoke duct elbow are the first optimization priority, the parameters of the smoke duct are the second optimization priority, and the parameters of the smoke duct expansion and contraction head are the third optimization priority. When optimizing the P value, optimization is performed in order of priority until P≤ΔP.

[0019] According to one embodiment of the present invention, the pressure threshold ΔP includes ΔP1, ΔP2 and ΔP3, wherein ΔP1<ΔP2<ΔP3; if the resistance value P of the smoke duct assembly is ≤ΔP1, the pipe of the range hood is installed correctly; if ΔP2≥P>ΔP1, when optimizing the P value, the angle of the smoke duct elbow is optimized first; if ΔP3≥P>ΔP2, when optimizing the P value, the angle of the smoke duct elbow and the length and / or material and / or diameter of the smoke duct are optimized first; if P>ΔP3, when optimizing the P value, the smoke duct assembly is optimized as a whole, and the optimized parameters include the length, material and diameter of the smoke duct, the contraction angle and shape of the smoke duct expansion and contraction head, and the angle of the smoke duct elbow.

[0020] According to one embodiment of the present invention, the parameters of the smoke duct elbow are the first optimization priority, the parameters of the smoke duct are the second optimization priority, and the parameters of the smoke duct expansion and contraction head are the third optimization priority. When optimizing the P value, if the resistance value P of the smoke duct assembly is still in the state of P>ΔP1 when the corresponding preferred optimization project is completed, other items are continuously optimized according to the priority until the resistance value P of the smoke duct assembly satisfies P≤ΔP1.

[0021] According to one embodiment of the present invention, the range hood is preset with three preset resistance values ​​of low, medium and high and four corresponding power gears. The three preset resistance values ​​are p1, p2 and p3 respectively, and the power values ​​of the four power gears are W1, W2, W3 and W4 respectively. After the range hood is successfully installed, when the range hood is running and receives the resistance value P of the smoke pipe assembly sent by the server, if:

[0022] P<p1: the range hood power is set to W1;

[0023] p1<P≤p2: the range hood power is set to W2;

[0024] p2<P≤p3: the range hood power is set to W3;

[0025] P>p3: The range hood power is set to W4.

[0026] Compared with the prior art, the range hood installation and debugging method of the present invention has the following advantages:

[0027] According to the range hood installation and debugging method of the present invention, after each range hood is installed, the installer inputs the installation parameters of the smoke pipe into the range hood on site, and the range hood uploads the parameters to the server. The server calculates the resistance value P of the smoke pipe assembly online, and then sends the calculation result to the range hood and displays it to the user. The installer makes modification suggestions, and optimizes and adjusts the smoke pipe assembly of the range hood if the user accepts, so that the resistance value of the smoke pipe assembly can be reduced to below the recommended resistance value, thereby improving the user's range hood usage effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is an example diagram of a smoke tube assembly;

[0029] In the figure: a smoke tube elbow 100, a first smoke tube elbow 110, a second smoke tube elbow 120, a smoke tube 200, a first smoke tube 210, a second smoke tube 220, a first smoke tube expansion and contraction head 300, and a second smoke tube expansion and contraction head 400.

[0030] The realization of the functions and advantages of the present invention will be further described in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. That is, in some embodiments of the present invention, these practical details are not necessary. In addition, for the purpose of simplifying the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0032] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0034] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0035] The invention discloses a method for installing and debugging a range hood, and the method for installing and debugging a range hood disclosed in the invention comprises the following steps:

[0036] Input the parameters of the smoke pipe assembly and the floor parameters into the smoke machine;

[0037] The range hood sends the parameters of the smoke pipe assembly and the parameters of the floor to the server for calculation;

[0038] The server calculates the resistance value P of the smoke tube assembly according to the parameters of the smoke tube assembly and sends the calculation result to the range hood;

[0039] The smoke exhaust fan compares the calculated resistance value P of the smoke tube assembly with the preset pressure threshold ΔP and displays the result:

[0040] If P>ΔP, there is a problem with the pipe installation of the range hood, and the pipe needs to be readjusted to optimize the P value;

[0041] If P<ΔP, the hood pipe installation is reasonable.

[0042] When installing the range hood, the exhaust outlet of the range hood and the air inlet of the public flue need to be connected through a smoke pipe assembly. The diameter of the air inlet of the public flue is different in different communities, and different range hoods have different requirements for the diameter of the smoke pipe to meet their exhaust volume. Therefore, when installing range hoods in different users' homes, it is necessary to set up a matching smoke pipe assembly to connect the exhaust outlet of the range hood and the air inlet of the public flue.

[0043] After the range hood is installed at the user's place, the installer will input the parameters of the smoke duct assembly connecting the exhaust port of the range hood and the air inlet of the public flue and the user's floor parameters into the range hood, and send the parameters of the smoke duct assembly and the user's floor parameters to the server through the range hood. The server calculates the resistance value P of the smoke duct assembly on the current floor and sends the result to the range hood. The range hood compares the calculated result with the pressure threshold ΔP, ΔP being the maximum resistance of the smoke duct assembly that the range hood can withstand during normal operation. After the range hood is installed, if the resistance value P of the smoke duct assembly is greater than the pressure threshold ΔP, the range hood cannot guarantee the air volume even if it runs at maximum power, affecting the range hood's oil fume extraction effect. Therefore, it is necessary to optimize the pipeline, reduce the resistance value of the smoke duct assembly, ensure the air extraction volume of the range hood, and ensure the range hood's oil fume purification effect.

[0044] According to the range hood installation and debugging method of the present invention, after each range hood is installed, the installer inputs the installation parameters of the smoke pipe into the range hood on site, and the range hood uploads the parameters to the server. The server calculates the resistance value P of the smoke pipe assembly online, and then sends the calculation result to the range hood and displays it to the user. The installer makes modification suggestions, and optimizes and adjusts the smoke pipe assembly of the range hood if the user accepts, so that the resistance value of the smoke pipe assembly can be reduced to below the recommended resistance value, thereby improving the user's range hood usage effect.

[0045] The smoke exhaust fan installation and debugging method of the present invention, the smoke pipe assembly includes a smoke pipe, a smoke pipe expansion and contraction head and a smoke pipe elbow, the smoke pipe parameters include the number, length, material and diameter of the smoke pipe, the number and local resistance coefficient of the smoke pipe expansion and contraction head, the local resistance coefficient of the smoke pipe expansion and contraction head is related to the angle and shape of the pipe expansion or contraction and the number and local resistance coefficient of the smoke pipe elbow, and the local resistance coefficient of the smoke pipe elbow is related to the angle of the elbow.

[0046] like Figure 1 As shown, Figure 1 The embodiment of the smoke pipe assembly is shown in FIG. 1 , but the structure of the smoke pipe assembly is not limited to Figure 1The smoke tube assembly includes a smoke tube elbow 100, a smoke tube 200, a first smoke tube expansion and contraction head 300 and a second smoke tube expansion and contraction head 400. The first smoke tube expansion and contraction head 300 is connected to the exhaust port of the range hood, and the second smoke tube expansion and contraction head 400 is connected to the flue. In the above figure, the smoke tube elbow 100 includes a first smoke tube elbow 110 and a second smoke tube elbow 120, and the smoke tube 200 includes a first smoke tube 210 and a second smoke tube 220. In the embodiment of the above figure, the smoke tube 200 is a square tube, so the second smoke tube expansion and contraction head 400 is a square-to-round expansion and locking head. It can be seen from the above figure that the parameters of the smoke tube elbow 100, the smoke tube 200, the first smoke tube expansion and contraction head 300 and the second smoke tube expansion and contraction head 400 will affect the resistance value P of the smoke tube assembly. The angle of the smoke tube elbow 100 affects the local resistance coefficient and the resistance of the smoke tube elbow 100 to the airflow. Since the smoke tube 200 is a square tube, the expansion angle and shape of the first smoke tube expansion and contraction head 300 affect the resistance of the first smoke tube expansion and contraction head 300 to the airflow, and the contraction angle and shape of the second smoke tube expansion and contraction head 400 affect the resistance of the second smoke tube expansion and contraction head 400 to the airflow. Taking the first smoke tube expansion and contraction head 300 as an example, the first smoke tube expansion and contraction head 300 has at least one inclined surface, and the inclination angle of the inclined surface affects the length of the first smoke tube expansion and contraction head 300. The smaller the angle between the inclined surface of the first smoke tube expansion and contraction head 300 and the vertical surface, the longer the length of the first smoke tube expansion and contraction head 300 extending from the air inlet end to the air outlet end when the air outlet end of the first smoke tube expansion and contraction head 300 is expanded to match the size of the air inlet end of the first smoke tube 210, and the first smoke tube expansion and contraction head 300 The larger the angle between the inclined surface and the vertical surface, the shorter the length of the first smoke tube expansion and contraction head 300 extending from the air inlet end to the air outlet end when the air outlet end of the first smoke tube expansion and contraction head 300 is expanded to match the size of the air inlet end of the first smoke tube 210. By adjusting the expansion angle of the first smoke tube expansion and contraction head 300, the shape of the first smoke tube expansion and contraction head 300 is changed. By optimizing the expansion angle and shape of the first smoke tube expansion and contraction head 300, the resistance of the first smoke tube expansion and contraction head 300 to the airflow can be reduced. Of course, when the smoke tube 200 is a round tube, the first smoke tube expansion and contraction head 300 needs to be changed into a square-to-round joint; and when adjusting the resistance value of the smoke tube assembly, the smoke tube 200 can also be adjusted from a square tube to a round tube.

[0047] exist Figure 1 In the illustrated embodiment, the smoke pipe elbow 100 is divided into a first smoke pipe elbow 110 and a second smoke pipe elbow 120 ; in other embodiments, the smoke pipe elbow 100 is an integrally retractable bellows, and stretching or compressing the smoke pipe elbow 100 can change the angle of the smoke pipe elbow 100 , thereby changing the local resistance coefficient of the smoke pipe elbow 100 .

[0048] The material, diameter and length of the smoke tube 200 can also be optimized. When the resistance value P of the smoke tube assembly is greater than ΔP, the resistance of the smoke tube to the airflow can be changed by changing the material and / or diameter and / or length of the smoke tube 200 .

[0049] The smoke exhaust fan installation and debugging method of the present invention, the pressure value of the smoke exhaust pipe assembly Among them, P1 is the resistance of the smoke duct, n is the number of smoke ducts; P2 is the resistance of the smoke duct expansion head, m is the number of smoke duct expansion heads; P3 is the resistance of the smoke duct elbow, i is the number of smoke duct elbows, and P4 is the resistance of the floor height.

[0050] Different users have different installation locations for their range hoods, which affects the number of smoke pipes / smoke pipe elbows in the smoke pipe assembly. Generally, there are two smoke pipe expansion and contraction heads, one installed at the exhaust port of the range hood, and the other connected between the air inlet of the public flue and the air outlet of the smoke pipe. Therefore, when the server calculates the resistance of the smoke pipe assembly, it is necessary to accumulate the resistance of each smoke pipe, the resistance of each smoke pipe expansion and contraction head, the resistance of each smoke pipe elbow, and the resistance caused by the floor height. Taking the above figure as an example, when the server calculates the resistance of the smoke pipe assembly, it is necessary to calculate the resistance of the first smoke pipe elbow 110, the resistance of the second smoke pipe elbow 120, the resistance of the first smoke pipe 210, the resistance of the second smoke pipe 220, the resistance of the first smoke pipe expansion and contraction head 300, the resistance of the second smoke pipe expansion and contraction head 400, and the resistance of the floor height. The sum of these resistances is the resistance generated when the smoke pipe assembly is just installed on the current floor.

[0051] In the smoke exhaust fan installation and debugging method of the present invention, the calculation method of the resistance P1 of the smoke exhaust pipe is: P1 = f*(L / D)*(p*V 2 / 2), where: f is the friction coefficient, L is the length of the smoke tube, D is the inner diameter of the smoke tube, p is the air density, and V is the flow velocity;

[0052] The calculation method of the resistance P2 of the smoke tube expansion and contraction head is: P2 = k*(p*V 2 / 2), where: k is the local resistance coefficient, which is related to the angle and shape of the expansion or contraction of the pipeline, p is the air density, and V is the flow velocity;

[0053] The calculation method of the resistance P3 of the smoke pipe elbow is: P3 = w*(p*V 2 / 2), where w is the local resistance coefficient, which is related to the angle of the bend, p is the air density, and V is the flow velocity;

[0054] The calculation method of the layer height resistance P4 is: P4 = a*H / L*(p*V 2 / 2), where a is the correction coefficient, H is the total number of floors, L is the number of user floors, p is the air density, and V is the flow velocity.

[0055] The above calculation formula is set on the server. When the range hood is installed in different users' homes, the friction coefficient f of the smoke pipe is input into the range hood according to the material of the smoke pipe, the length L and the inner diameter D of the smoke pipe are input into the range hood, the expansion or contraction angle of the pipe of the smoke pipe expander is input into the range hood, the angle of the smoke pipe elbow is input into the range hood, the total number of floors H and the number of floors L where the user is located are input into the range hood, and the server matches the local resistance coefficient k according to the expansion or contraction angle of the pipe of the smoke pipe expander, and matches the local resistance coefficient w according to the angle of the smoke pipe elbow. After that, the user starts the range hood, and the range hood calculates the airflow velocity V at the current operating power according to its operating power, and uploads the airflow velocity V to the server, and then calculates the corresponding resistance value according to the corresponding formula, and superimposes all resistance values ​​to finally calculate the resistance value P of the smoke pipe assembly.

[0056] In the range hood installation and debugging method of the present invention, if P>ΔP, when optimizing the P value, the optimized parameters include the length and / or material and / or diameter of the smoke pipe, and / or the expansion or contraction angle and / or shape of the smoke pipe expansion and contraction head, and / or the angle of the smoke pipe elbow.

[0057] The factors affecting the resistance P1 of the smoke duct include the length, material and diameter of the smoke duct, the factors affecting the resistance P2 of the smoke duct expansion and contraction head include the angle and shape of expansion or contraction, and the factors affecting the resistance P3 of the smoke duct elbow include the angle of the elbow. When the resistance value P of the smoke duct assembly is greater than ΔP, the installer will make modification suggestions and optimize the smoke duct assembly of the range hood if the user accepts it. Different users have different kitchen installation spaces, so when adjusting the smoke duct assembly to optimize the resistance value P of the smoke duct assembly, it is necessary to adjust the smoke duct assembly in different ways according to the installation conditions of the user's kitchen space, so as to solve the problem of excessive resistance value of the smoke duct assembly with the minimum adjustment amount.

[0058] In the range hood installation and debugging method of the present invention, the parameters of the smoke duct elbow are the first optimization priority, the parameters of the smoke duct are the second optimization priority, and the parameters of the smoke duct expansion and contraction head are the third optimization priority. When optimizing the P value, the optimization is performed in order of priority until P≤ΔP.

[0059] It is easy to know that the smoke pipe elbow usually adopts a bellows, and it is most convenient to adjust the bellows. It does not require a large project. Even just stretching or moving the position of the bellows can change the angle of the bellows and reduce the local resistance of the bellows. Therefore, when adjusting the smoke pipe assembly to optimize the resistance value of the smoke pipe assembly, the smoke pipe elbow that is easiest to adjust should be adjusted first. After adjusting the smoke pipe elbow, if the smoke pipe assembly resistance value P≤ΔP, there is no need to continue to adjust the smoke pipe expansion and contraction head and the smoke pipe; if the smoke pipe assembly resistance value P is still in the state of P>ΔP, the smoke pipe needs to be further adjusted, and the length and / or material and / or diameter of the smoke pipe can be changed. After completing the adjustment of the smoke pipe, if P≤ΔP, there is no need to continue to adjust the smoke pipe expansion and contraction head. If the smoke pipe assembly resistance value P is still in the state of P>ΔP, continue to adjust the parameters of the smoke pipe expansion and contraction head. The resistance of the smoke pipe expansion and contraction head can be adjusted by changing the angle and / or shape of the smoke pipe expansion and contraction head. Different optimization priorities are set, and the resistance P of the fume duct assembly can be optimized in a way that minimizes the amount of work.

[0060] In the range hood installation and debugging method of the present invention, the pressure threshold ΔP includes ΔP1, ΔP2 and ΔP3, wherein ΔP1<ΔP2<ΔP3; if the resistance value P of the smoke pipe assembly is ≤ΔP1, the pipe installation of the range hood is correct; if ΔP2≥P>ΔP1, when optimizing the P value, the angle of the smoke pipe elbow is optimized first; if ΔP3≥P>ΔP2, when optimizing the P value, the angle of the smoke pipe elbow and the length and / or material and / or diameter of the smoke pipe are optimized first; if P>ΔP3, when optimizing the P value, the smoke pipe assembly is optimized as a whole, and the optimized parameters include the length, material and diameter of the smoke pipe, the contraction angle and shape of the smoke pipe expansion and contraction head, and the angle of the smoke pipe elbow.

[0061] As described above, an optimization priority is set, and the smoke tube assembly can be adjusted in order of priority to achieve the goal of reducing the resistance of the smoke tube assembly through minimal modification, so that the resistance of the smoke tube assembly meets the standard. However, if there is no reference to the resistance value, the smoke tube assembly can only be adjusted and verified blindly step by step, and the smoke tube assembly needs to be adjusted multiple times, which will cause a lot of workload for the operator. The smoke exhaust fan installation and debugging method of the present invention divides the pressure threshold ΔP into three levels, and the pressure thresholds of the three levels are ΔP1, ΔP2 and ΔP3, ΔP1, ΔP2 and ΔP3 increase successively, and the smoke tube assembly needs to be adjusted as long as the resistance value P of the smoke tube assembly is greater than ΔP1. However, since the three levels of pressure thresholds are set as a reference, the corresponding parameters can be adjusted in different pressure ranges, and the resistance P of the smoke tube assembly can be optimized in one step. For example, when the resistance value of the smoke pipe assembly is P≤ΔP1, the pipe installation of the range hood is reasonable, the smoke pipe assembly does not need to be adjusted, the air volume of the range hood can be guaranteed, and the range hood can achieve the best smoke purification effect; when ΔP2≥P>ΔP1, the smoke pipe elbow can be adjusted first, and the angle of the smoke pipe elbow can be changed. Through simple adjustment, P≤ΔP1; and when ΔP3≥P>ΔP2, simply optimizing the angle of the smoke pipe elbow can no longer achieve P≤ΔP1, and the angle of the smoke pipe elbow and the length or / and material or / and diameter of the smoke pipe need to be adjusted at the same time; similarly, when P>ΔP3, it means that the resistance of the smoke pipe assembly is already very large, and the smoke pipe assembly needs to be optimized as a whole to achieve P≤ΔP1. By dividing the pressure threshold ΔP into three levels, after the server calculates the resistance value P of the smoke pipe assembly, the size of the resistance has a reference range, which is convenient for targeted adjustment of the smoke pipe assembly.

[0062] In the range hood installation and debugging method of the present invention, the parameters of the smoke duct elbow are the first optimization priority, the parameters of the smoke duct are the second optimization priority, and the parameters of the smoke duct expansion and contraction head are the third optimization priority. When optimizing the P value, if the resistance value P of the smoke duct assembly is still in the state of P>ΔP1 when the corresponding preferred optimization project is completed, other items are continuously optimized according to the priority until the resistance value P of the smoke duct assembly satisfies P≤ΔP1.

[0063] Although three levels of pressure threshold ΔP are set, the above-mentioned level division is only an empirical suggestion verified by R&D tests. When the pressure value P of the smoke pipe assembly exceeds the standard and is optimized according to the optimization suggestions given in the above-mentioned pressure threshold range, if P≤ΔP1 cannot be achieved, other items will continue to be optimized according to priority until the pressure value P of the smoke pipe assembly satisfies P≤ΔP1. For example, when ΔP2≥P>ΔP1, the smoke pipe elbow can be adjusted first to change the angle of the smoke pipe elbow, and the pressure value P of the smoke pipe assembly can be confirmed again after simple adjustment. If P≤ΔP1 is not achieved, the installer needs to continue to adjust the parameters of the smoke pipe so that the resistance value P of the smoke pipe assembly satisfies P≤ΔP1; similarly, if ΔP3≥P>ΔP2, after the installer has adjusted the angle of the smoke pipe elbow and the length, material and diameter of the smoke pipe, if P≤ΔP1 is not achieved, the installer needs to continue to adjust the contraction angle and shape of the smoke pipe expansion and contraction head.

[0064] The range hood installation and debugging method of the present invention is that the range hood is preset with three preset resistance values ​​of low, medium and high and four corresponding power gears. The three preset resistance values ​​are p1, p2 and p3 respectively, and the power values ​​of the four power gears are W1, W2, W3 and W4 respectively. After the range hood is successfully installed, when the range hood is running and receives the resistance value P of the smoke pipe assembly sent by the server, if:

[0065] P<p1: the range hood power is set to W1;

[0066] p1<P≤p2: the range hood power is set to W2;

[0067] p2<P≤p3: the range hood power is set to W3;

[0068] P>p3: The range hood power is set to W4.

[0069] After adjusting the resistance value P of the smoke pipe resistance, P≤ΔP, the smoke exhaust air volume of the range hood can be guaranteed; in order to further improve the user experience and reduce the noise of the range hood, the range hood is provided with three preset resistance values ​​p1, p2 and p3 lower than ΔP. When the range hood is used, if the actual resistance value of the smoke pipe assembly P<p1, the power of the range hood is set to W1. Under this operating power, the risk of the range hood can be guaranteed, the experience effect is good, and the noise is low. Similarly, when p1<P≤p2, the power of the range hood is set to W2. Under this operating power, the risk of the range hood can be guaranteed, the experience effect is good, and the noise is low; corresponding to p2<P≤p3: the power of the range hood is set to W3; P>p3: the power of the range hood is set to W4. Setting the power level corresponding to the preset resistance can ensure the experience effect of the range hood while ensuring the air volume of the range hood.

[0070] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for installing and debugging a range hood, characterized in that: The following steps are involved: Input the parameters of the smoke pipe assembly and the floor parameters into the smoke machine; The range hood sends the parameters of the smoke pipe assembly and the parameters of the floor to the server for calculation; The server calculates the resistance value P of the smoke tube assembly according to the parameters of the smoke tube assembly and sends the calculation result to the range hood; The smoke exhaust fan compares the calculated resistance value P of the smoke tube assembly with the preset pressure threshold ΔP and displays the result: If P>ΔP, there is a problem with the pipe installation of the range hood, and the pipe needs to be readjusted to optimize the P value; If P<ΔP, the pipe installation of the range hood is reasonable.

2. The method for installing and debugging a range hood according to claim 1, characterized in that: The smoke pipe assembly includes a smoke pipe, a smoke pipe expansion and contraction head and a smoke pipe elbow. The smoke pipe parameters include the number, length, material and diameter of the smoke pipe, the number and local resistance coefficient of the smoke pipe expansion and contraction heads, the local resistance coefficient of the smoke pipe expansion and contraction heads is related to the angle and shape of the pipe expansion or contraction and the number and local resistance coefficient of the smoke pipe elbows, and the local resistance coefficient of the smoke pipe elbows is related to the angle of the elbow.

3. The method for installing and debugging a range hood according to claim 2, characterized in that: The pressure value of the smoke pipe assembly P=∑P1 n +∑P2 m +∑P3 i +P4, where P1 is the resistance of the smoke duct, n is the number of smoke ducts; P2 is the resistance of the smoke duct expansion head, m is the number of smoke duct expansion heads; P3 is the resistance of the smoke duct elbow, i is the number of smoke duct elbows, and P4 is the resistance of the floor height.

4. The method for installing and debugging a range hood according to claim 3, characterized in that: The calculation method of the resistance P1 of the smoke pipe is: P1 = f*(L / D)*(p*V 2 / 2), where: f is the friction coefficient, L is the length of the smoke tube, D is the inner diameter of the smoke tube, p is the air density, and V is the flow velocity; The calculation method of the resistance P2 of the smoke tube expansion and contraction head is: P2 = k*(p*V 2 / 2), where: k is the local resistance coefficient, which is related to the angle and shape of the expansion or contraction of the pipeline, p is the air density, and V is the flow velocity; The calculation method of the resistance P3 of the smoke pipe elbow is: P3 = w*(p*V 2 / 2), where w is the local resistance coefficient, which is related to the angle of the bend, p is the air density, and V is the flow velocity; The calculation method of the layer height resistance P4 is: P4 = a*H / L*(p*V 2 / 2), where a is the correction coefficient, H is the total number of floors, L is the number of user floors, p is the air density, and V is the flow velocity.

5. The method for installing and debugging a range hood according to claim 4, characterized in that: If P>ΔP, when optimizing the P value, the optimized parameters include the length and / or material and / or diameter of the smoke pipe, and / or the expansion or contraction angle and / or shape of the smoke pipe expansion and contraction head, and / or the angle of the smoke pipe elbow.

6. The method for installing and debugging a range hood according to claim 5, characterized in that: The parameters of the smoke pipe elbow are of the first optimization priority, the parameters of the smoke pipe are of the second optimization priority, and the parameters of the smoke pipe expansion and contraction head are of the third optimization priority. When optimizing the P value, the optimization is performed in order of priority until P≤ΔP.

7. The method for installing and debugging a range hood according to claim 5, characterized in that: The pressure threshold ΔP includes ΔP1, ΔP2 and ΔP3, wherein ΔP1<ΔP2<ΔP3; if the resistance value P of the smoke pipe assembly is ≤ΔP1, the pipe of the range hood is installed correctly; if ΔP2≥P>ΔP1, when optimizing the P value, the angle of the smoke pipe elbow is optimized first; if ΔP3≥P>ΔP2, when optimizing the P value, the angle of the smoke pipe elbow and the length and / or material and / or diameter of the smoke pipe are optimized first; if P>ΔP3, when optimizing the P value, the smoke pipe assembly is optimized as a whole, and the optimized parameters include the length, material and diameter of the smoke pipe, the contraction angle and shape of the smoke pipe expansion and contraction head, and the angle of the smoke pipe elbow.

8. The method for installing and debugging a range hood according to claim 7, characterized in that: The parameters of the smoke pipe elbow are the first optimization priority, the parameters of the smoke pipe are the second optimization priority, and the parameters of the smoke pipe expansion and contraction head are the third optimization priority. When optimizing the P value, if the resistance value P of the smoke pipe assembly is still in the state of P>ΔP1 when the corresponding preferred optimization project is completed, other items are continuously optimized according to the priority until the resistance value P of the smoke pipe assembly satisfies P≤ΔP1.

9. The method for installing and debugging a range hood according to claim 1, characterized in that: The range hood has three preset resistance values ​​of low, medium and high and four corresponding power gears. The three preset resistance values ​​are p1, p2 and p3 respectively, and the power values ​​of the four power gears are W1, W2, W3 and W4 respectively. After the range hood is successfully installed, when the range hood is running and receives the resistance value P of the smoke pipe assembly sent by the server, if: P<p1: the range hood power is set to W1; p1<P≤p2: the range hood power is set to W2; p2<P≤p3: the range hood power is set to W3; P>p3: The range hood power is set to W4.

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