Self-cleaning water flow system working method and extractor hood

Abstract

The present application relates to a kind of self-cleaning water flow system working method, self-cleaning water flow system includes water box, water pipe and water pump, the water inlet end of the water pipe is inserted in water box, the water pump is connected at the water outlet end of water pipe;When carrying out self-cleaning work, control water pump to carry out pumping work, and the working current I of water pump is obtained in real time detection, whether the water box is short of water according to the working current of water pump, whether water pipe is blocked, whether water pipe is disconnected, whether water pipe is air leakage, whether water pump is fault.The self-cleaning water flow system working method is low in cost, and can simultaneously realize multiple problem detection.The present application also relates to a kind of range hood, including fan, self-cleaning water flow system, controller, memory;The controller is respectively connected with fan, self-cleaning water flow system, memory electric signal, and the program for realizing the self-cleaning water flow system working method as described above is stored in memory, and the program in the memory can be retrieved and executed by controller.

Description

TECHNICAL FIELD

[0001] The present application relates to a self-cleaning water flow system working method, and also relates to a range hood applying the self-cleaning water flow system working method. BACKGROUND

[0002] During long-term use, the blades and the inner wall plates of the range hood will be attached with a layer of oil stains after long-time contact with oil fume. When the oil stains on the blades increase, the smoke extraction efficiency of the blades will decrease and the power consumption will increase. Meanwhile, when the oil stains on the wall plates increase, bacteria and cockroaches will breed, which will affect the hygiene of the kitchen. Therefore, the blades and the inner wall of the range hood must be cleaned regularly. At present, there are range hoods with automatic cleaning function on the market. For example, the Chinese patent application CN110822520A (application number 201911139168.X) discloses a range hood cleaning device, a range hood and an automatic cleaning control method thereof. The range hood disclosed in the patent application is provided with a range hood cleaning device. In order to effectively judge the state of the water pump and the cleaning pipeline during the cleaning process, a pressure sensor is additionally provided to realize water pressure detection. Through the detected water pressure data, it is judged whether the gear of the water pump is too large or whether the cleaning pipeline is blocked, so as to avoid pipeline collapse caused by excessive water pressure. This detection method has high cost because additional components are required for detection. In addition, the range hood cleaning device also has some problems such as pipeline disconnection and water shortage in the water box, which need to be solved during the operation of the range hood cleaning device. SUMMARY

[0003] The first technical problem to be solved by the present application is to provide a self-cleaning water flow system working method with low cost and capable of simultaneously detecting multiple problems.

[0004] The second technical problem to be solved by the present application is to provide a range hood applying the self-cleaning water flow system working method.

[0005] The technical solution adopted by the present application to solve the first technical problem is as follows: a self-cleaning water flow system working method, characterized in that: the self-cleaning water flow system comprises a water box, a water pipe and a water pump, the water inlet end of the water pipe extends into the water box, and the water pump is connected to the water outlet end of the water pipe.

[0006] During self-cleaning operation, the water pump is controlled to perform water pumping operation, and the working current I of the water pump is detected in real time. Whether the water box is short of water, whether the water pipe is blocked, whether the water pipe is disconnected, whether the water pipe is leaking, and whether the water pump is faulty are judged according to the working current of the water pump.

[0007] As an improvement, when performing the self-cleaning operation, the water pump is controlled to operate at the set voltage V0, and the current I is compared with the first current threshold I1, the second current threshold I2 and the third current threshold I3, where I1

[0008] If I

[0009] If I1≤I≤I2, it is determined that the self-cleaning water flow system is operating normally.

[0010] If I2

[0011] If I≥I3, it is determined that the water pump is malfunctioning.

[0012] In order to effectively distinguish between the cases of water shortage in the water box, air leakage in the water pipe or disconnection of the water pipe, when I

[0013] If I'

[0014] If I'≥I1, it is determined that the water box is out of water or the water pipe is leaking.

[0015] In order to facilitate determination of the disconnection position of the water pipe, the water pipe comprises n+1 connected pipe bodies, where n is a positive integer, and the abutment positions of the pipe bodies from upstream to downstream are defined as N1, N2, …, Nn, respectively.

[0016] When I'

[0017] If (I1-I0)*x / n≤I''-I0

[0018] In order to effectively distinguish between the cases of water shortage in the water box and air leakage in the water pipe, when I'

[0019] If I'''

[0020] If I'''≥I1, it is determined that the water pipe is leaking.

[0021] Preferably, in the case of I2 < I < I3, the working voltage of the water pump is adjusted to V4, V4 = k1 * V0, k1 is a first adjustment coefficient and k1 > 1, and then the working current I’’’’ of the water pump is detected in real time;

[0022] If I’’’’ is reduced to a value less than I2 within a set time T, it is determined that the blockage in the water pipe is removed, otherwise it is determined that the blockage in the water pipe is serious and needs to be cleaned.

[0023] The technical scheme adopted by the present application to solve the second technical problem is: a range hood, characterized in that: comprising a fan, a self-cleaning water flow system, a controller, a memory; the controller is electrically connected with the fan, the self-cleaning water flow system and the memory respectively, the memory stores a program for realizing the working method of the self-cleaning water flow system as described above, and the controller can retrieve and execute the program in the memory.

[0024] Preferably, the self-cleaning water flow system comprises a water box, a water pipe, a water pump and a nozzle, the water pump and the nozzle are electrically connected with the controller respectively, the water inlet end of the water pipe extends into the water box, the water pump is connected to the water outlet end of the water pipe, the water pump is connected to the nozzle through a water supply pipeline, and the nozzle is arranged in the fan.

[0025] In order to improve the self-cleaning effect, a heating device is arranged on the water supply pipeline, and the heating device is electrically connected with the controller.

[0026] Compared with the prior art, the advantages of the present application are that: the working method of the self-cleaning water flow system in the present application utilizes the working parameters of the water pump which are detected during the working process without the need to set additional detection devices, and then determines whether the water box is out of water, whether the water pipe is blocked, whether the water pipe is disconnected, whether the water pipe is leaking, and whether the water pump is malfunctioning during the self-cleaning working process, so as to facilitate the timely discovery of problems and ensure the reliable working of the self-cleaning water flow system.

[0027] And the range hood applying the working method of the self-cleaning water flow system has low cost of the self-cleaning water flow system and high intelligent degree in determining the working state of the self-cleaning water flow system during operation. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The flowchart of the working method of the self-cleaning water flow system in the embodiment of the present application. DETAILED DESCRIPTION

[0029] The present application will be further described in detail below with reference to the embodiments of the drawings.

[0030] The self-cleaning water flow system usually comprises a water box, a water pipe and a water pump, the water box is used to hold water for pumping use when performing self-cleaning work, when the water in the water box is insufficient, water needs to be added to the water box to ensure the continuation of the self-cleaning work. The water inlet end of the water pipe extends into the water box, and the water pump is connected to the water outlet end of the water pipe, when performing self-cleaning work, the water pump is controlled to work to pump water, the water pump usually comprises a motor, the working voltage and current of the motor are important working parameters of the water pump, which are usually detected in real time during self-cleaning work.

[0031] Based on the self-cleaning water flow system, as shown in the figure, Figure 1 The working method of the self-cleaning water flow system in the embodiment is: when performing self-cleaning work, the water pump is controlled to work to pump water, and the working current I of the water pump is detected in real time, whether the water box is out of water, whether the water pipe is blocked, whether the water pipe is disconnected, whether the water pipe is leaking, and whether the water pump is malfunctioning are judged according to the working current of the water pump, according to the need, the corresponding alarm reminder can be carried out for these situations to remind adding water or carrying out corresponding maintenance work.

[0032] For fixed products, the amount of water required during self-cleaning usually does not change greatly, based on this, the water pump is usually controlled to work at a fixed voltage to ensure the stability of water supply.

[0033] Specifically, the working method of the self-cleaning water flow system in the embodiment, when performing self-cleaning work, the water pump is controlled to work to pump water according to the set voltage V0, and I is compared with the first current threshold I1, the second current threshold I2 and the third current threshold I3, wherein I1

[0034] If I

[0035] In order to effectively distinguish between the cases of water box out of water, water pipe leaking or water pipe disconnected, when I

[0036] In the working state of the working voltage V1 of the water pump, the working current I' of the water pump is detected in real time.

[0037] If I' < I1, i.e. in the case of increasing the working voltage of the water pump, the current of the water pump still cannot exceed a smaller threshold I1, it is judged that the water pipe is disconnected.

[0038] Since the water box and the water outlet usually have a relatively long distance at one end, and in order to adapt to the curved path in the installation environment, usually a plurality of pipe bodies are connected together to form a water pipe. Thus, in order to facilitate the determination of the disconnection position of the water pipe, the following method is used for judgment. Specifically, the water pipe includes n+1 connected pipe bodies, n is a positive integer, and the abutment positions of each pipe body from upstream to downstream are defined as N1, N2,..., Nn.

[0039] In the case of I' < I1, the working voltage of the water pump is adjusted to V2, V2=k2* V0, k2 is a second adjustment coefficient and k2 < 1, i.e. the working voltage of the water pump is reduced, and then the working current I'' of the water pump is detected in real time. If the disconnection position of the water pipe is closer to the upstream, the current of the water pump will be smaller, based on which, if (I1-I0)*x / n≤I''-I0<(I1-I0)*(x+1) / n, it is judged that the water pipe is disconnected at the position Nx, wherein I0 is the working current of the water pump when it is idle, x is a positive integer, and 1≤x≤n.

[0040] If I' ≥ I1, it is judged that the water box is out of water or the water pipe is leaking. However, in order to effectively distinguish between the cases of the water box being out of water and the water pipe being leaking, in the case of I' > I1, the working voltage of the water pump is adjusted to V3, V3=k3* V0, k3 is a third adjustment coefficient and k3 > k1 > 1, k3 is data obtained by testing in the product research and development stage, based on which the working state of the self-cleaning water flow system can be effectively distinguished according to the following judgment. That is, by further providing the working voltage of the water pump, the judgment of the water box being out of water or the water pipe being leaking is accelerated, if the water box is out of water, based on the increase of the working voltage of the water pump, the current of the water pump will quickly decrease and the decrease amount is large, if the water pipe is leaking, the working current of the water pump will not have a large fluctuation. Based on this, in the working state of the working voltage of the water pump being V3, the working current I''' of the water pump is detected in real time; if I''' < I1, it is judged that the water box is out of water; if I''' ≥ I1, it is judged that the water pipe is leaking.

[0041] If I1≤I≤I2, it is judged that the self-cleaning water flow system is working normally.

[0042] If I2 < I < I3, it is judged that the water pipe is blocked.

[0043] In the case of water pipe blockage, in order to determine the degree of water pipe blockage, the working voltage of the water pump can be adjusted to V4 in the case of I2 < I < I3, V4 = k1 * V0, k1 is a first adjustment coefficient and k1 > 1, that is, the working voltage of the water pump is increased, and then the working current I''' of the water pump is detected in real time. On the basis of increasing the working voltage of the water pump, if only some small particles or soft materials in the water pipe cause the water pipe to be blocked, based on the power of the water pump driving the water flow, the blockage position can be flushed away, thereby eliminating the blockage condition, and under the premise that the blockage condition can be eliminated, the current of the corresponding water pump also decreases accordingly. Based on this, it can be determined whether I''' decreases to a value less than I2 within a set time T. If so, it is judged that the blockage condition in the water pipe is removed, otherwise it is judged that the water pipe is seriously blocked and needs to be cleaned.

[0044] If I is greater than or equal to I3, it is judged that the water pump is faulty, at which time the water pump can be prompted for timely maintenance.

[0045] The self-cleaning water flow system working method in the application utilizes the working parameters of the water pump that are necessarily detected without the need for setting additional detection devices, and then judges whether the water box is out of water, whether the water pipe is blocked, whether the water pipe is disconnected, whether the water pipe is leaking, and whether the water pump is faulty during the self-cleaning working process, so as to facilitate the timely discovery of problems and ensure the reliable working of the self-cleaning water flow system.

[0046] The self-cleaning water flow system working method can be applied to various products that need to perform self-cleaning work, such as air conditioners, range hoods, etc.

[0047] The application also relates to a range hood, which comprises a fan, a self-cleaning water flow system, a controller, and a memory. The controller is electrically connected with the fan, the self-cleaning water flow system, and the memory. The memory stores a program for realizing the self-cleaning water flow system working method as described above. The controller can call and execute the program in the memory.

[0048] Specifically, the self-cleaning water flow system comprises a water box, a water pipe, a water pump, and a nozzle. The water pump and the nozzle are electrically connected with the controller. The water inlet end of the water pipe extends into the water box. The water pump is connected to the water outlet end of the water pipe. The water pump is connected to the nozzle through a water supply pipeline. The nozzle is arranged in the fan. The positions of the water pump and the nozzle can adopt those in the prior art. In order to improve the self-cleaning effect, a heating device is arranged on the water supply pipeline and electrically connected with the controller. In this way, the water provided by the water pump can be heated by the heating device and then delivered to the nozzle for self-cleaning work. Hot water has stronger removal ability for dirt, thereby improving the self-cleaning effect.

[0049] The range hood with the self-cleaning water flow system working method has low cost, can comprehensively determine the working state of the self-cleaning water flow system during operation, and has high intelligent degree.

Claims

1. A method of operating a self-cleaning water flow system, characterized by: The self-cleaning water flow system comprises a water box, a water pipe and a water pump, the water pipe has an inlet end extending into the water box, and the water pump is connected to an outlet end of the water pipe; During the self-cleaning operation, the water pump is controlled to pump water, and the working current I of the water pump is detected in real time, and whether the water box is out of water, the water pipe is blocked, the water pipe is disconnected, the water pipe is out of gas, or the water pump is faulty is determined according to the working current of the water pump; During the self-cleaning operation, the water pump is controlled to pump water at a set voltage V0, and the current I is compared with a first current threshold I1, a second current threshold I2 and a third current threshold I3, wherein I1 If I If I1 If I2 If I2 If I In the case of I If I If I The water pipe comprises n+1 pipe bodies connected together, n is a positive integer, and the abutment positions of the pipe bodies from upstream to downstream are defined as N1, N2,..., Nn, respectively; In the case of I 2. The self-cleaning water flow system working method according to claim 1, characterized in that: If (I1-I0)*x / n≤I''-I0<(I1-I0)*(x+1) / n, it is determined that the water pipe is disconnected at the position Nx, wherein I0 is the working current of the water pump when it is idle, x is a positive integer, and 1≤x≤n. In the case of I If I 3. The self-cleaning water flow system method for operation according to claim 1 or 2, characterized in that: If I In the case of I2 4. A range hood characterized by: If I'''' is reduced to a value less than I2 within a set time T, it is determined that the blockage in the water pipe is removed, otherwise it is determined that the blockage in the water pipe is serious and needs to be cleaned. The self-cleaning water flow system comprises a water box, a water pipe and a water pump, the water pipe has an inlet end extending into the water box, and the water pump is connected to an outlet end of the water pipe; 5. The hood according to claim 4, characterized in that: The self-cleaning water flow system comprises a water box, a water pipe, a water pump and a nozzle, the water pump and the nozzle are respectively connected with the controller through electric signals, the water inlet end of the water pipe extends into the water box, the water pump is connected with the water outlet end of the water pipe, the water pump is connected with the nozzle through a water supply pipeline, and the nozzle is arranged in the fan.

6. The hood according to claim 5, characterized in that: A heating device is arranged on the water supply pipeline, and the heating device is connected with the controller through electric signals.

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