An oil fume purifier and a control method and control device thereof

Abstract

The application discloses an oil fume purifier and a control method and a control device thereof. The oil fume purifier comprises a load circuit. The control method comprises the following steps: acquiring a current working voltage and a current working current of the load circuit; determining a current theoretical current of the load circuit according to the current working voltage, and determining a current current deviation according to the current working current and the current theoretical current; and if the current current deviation is greater than a preset error threshold, sending maintenance instruction information. The technical scheme of the embodiment of the application can timely and accurately maintain the oil fume purifier according to actual maintenance requirements.

Description

TECHNICAL FIELD

[0001] The present application relates to the kitchen electrical technology field, and particularly relates to an oil fume purifier and a control method and a control device thereof. BACKGROUND

[0002] The oil fume of the kitchen directly discharged has a great impact on the environment, therefore, each manufacturer usually equips the oil fume purifier, and the oil fume of the flue is filtered and purified uniformly before being discharged.

[0003] The UV (ultraviolet) purifier is a commonly used oil fume purifier, and the UV purifier uses the high-energy ultraviolet light beam to decompose the oxygen molecules in the air, so as to generate the ozone. The ultraviolet and the ozone have a strong oxidation effect on the organic matter, and can decompose the organic molecules including the odor, so as to achieve the effect of removing the odor. On the other hand, the high-energy ultraviolet breaks the chemical bond of the odor gas, so that the odor gas is composed of the free-state atom or the group, and the generated ozone participates in the reaction process, so that the odor gas is finally cracked and oxidized to form the simple stable compound, and the effect of purifying the odor is achieved.

[0004] The UV lamp used in the UV purifier has a certain service life, when the UV lamp works for a long time, the light intensity will gradually decrease, and the particulate matter will be adhered to the surface of the lamp tube, so that the purification effect will decrease to a certain extent, and therefore, the maintenance or replacement needs to be performed in time, so as to ensure the purification effect of the oil fume odor. However, at present, the maintenance of the UV purifier is mostly performed by the manual irregular checking or the periodic maintenance, and this kind of mode is prone to the situation that the maintenance is not timely, the oil fume purification effect is not up to the standard, or the maintenance of the UV lamp tube is performed early, and the resource waste is caused, and it is difficult to timely and accurately maintain the oil fume purifier. SUMMARY

[0005] The present application provides an oil fume purifier and a control method and a control device thereof, so as to timely and accurately maintain the oil fume purifier according to the actual maintenance demand.

[0006] In a first aspect, the present application provides a control method of an oil fume purifier, the oil fume purifier comprising a load circuit, and the control method comprising:

[0007] obtaining a current working voltage and a current working current of the load circuit;

[0008] determining a current theoretical current of the load circuit according to the current working voltage, and determining a current current deviation according to the current working current and the current theoretical current;

[0009] if the current current deviation is greater than a preset error threshold, sending a maintenance instruction information.

[0010] Optionally, the load circuit comprises a plurality of purification loads arranged in parallel; the current theoretical current of the load circuit is determined according to the current working voltage, comprising:

[0011] The resistance value of the purification load is determined according to the rated electrical parameter of the purification load;

[0012] The theoretical current value of one purification load is determined according to the current working voltage and the resistance value of the purification load;

[0013] The number of purification loads in the load circuit is obtained, and the current theoretical current of the load circuit is determined according to the number of purification loads and the theoretical current value.

[0014] Optionally, the load circuit comprises a plurality of purification loads arranged in parallel; the control method further comprises:

[0015] The number of purification loads in the load circuit is obtained, and the preset error threshold is determined according to the number of purification loads.

[0016] Optionally, after determining that the current current deviation is greater than the preset error threshold, the control method further comprises:

[0017] The overcurrent fault threshold is determined according to the current theoretical current, the preset error threshold and a preset overcurrent fault parameter;

[0018] If the current working current is greater than the overcurrent fault threshold, the fault indication information is sent.

[0019] Optionally, after determining that the current current deviation is greater than the preset error threshold, the control method further comprises:

[0020] The open-circuit fault threshold is determined according to the current theoretical current, the preset error threshold and a preset open-circuit fault parameter;

[0021] If the current working current is less than the open-circuit fault threshold, the fault indication information is sent.

[0022] Optionally, the control method further comprises:

[0023] The start-stop instruction of the control end is received, and the start or stop of the oil fume purifier is controlled according to the start-stop instruction;

[0024] The control end comprises at least one of a local controller, a remote controller, a cloud platform and an extractor hood; the start or stop of the oil fume purifier is controlled according to the start-stop instruction, comprising:

[0025] If the start-stop instruction of any control end is a start instruction, the oil fume purifier is started;

[0026] If the start-stop instruction of all control ends is a stop instruction, the oil fume purifier is stopped.

[0027] Optionally, the control terminal comprises an extractor hood; the starting or stopping of the oil fume purifier is controlled according to the start-stop instruction, comprising:

[0028] Obtaining fan current data of the extractor hood;

[0029] If the fan current data is greater than a first current threshold, the oil fume purifier is started.

[0030] In a second aspect, based on the same inventive concept, the present application further provides a control device of an oil fume purifier, the oil fume purifier comprising a load circuit, the control device comprising:

[0031] A parameter acquisition module is configured to acquire a current working voltage and a current working current of the load circuit;

[0032] A calculation module is configured to determine a current theoretical current of the load circuit according to the current working voltage, and determine a current current deviation according to the current working current and the current theoretical current;

[0033] A control module is configured to send maintenance instruction information when the current current deviation is greater than a preset error threshold.

[0034] In a third aspect, based on the same inventive concept, the present application further provides an oil fume purifier, comprising a load circuit and a main control board electrically connected with the load circuit; the main control board is provided with:

[0035] At least one processor;

[0036] A voltage acquisition circuit is in communication connection with the processor, and is configured to acquire a working voltage of the load circuit;

[0037] A current acquisition circuit is in communication connection with the processor, and is configured to acquire a working current of the load circuit;

[0038] A memory is in communication connection with the processor; the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to execute the control method provided in any of the embodiments of the present application.

[0039] Optionally, the load circuit comprises a plurality of purifying loads arranged in parallel;

[0040] The main control board is further provided with an encoder in communication connection with the processor, and the encoder is configured to determine the number of purifying loads in the load circuit.

[0041] The technical scheme of the embodiment of the present application acquires the current working voltage and the current working current of the load circuit, determines the current theoretical current of the load circuit according to the current working voltage, determines the current current deviation according to the current working current and the current theoretical current, and sends the maintenance instruction information to prompt the staff to maintain the oil fume purifier when the current current deviation is greater than the preset error threshold, which can eliminate the misjudgment caused by the power voltage fluctuation, improve the accuracy of the load circuit operation condition judgment, and thus can timely and accurately judge whether the oil fume purifier needs to be maintained, thereby avoiding the situation of early maintenance or delayed maintenance.

[0042] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0044] Figure 1 is a flowchart of a control method of an oil fume purifier provided by the embodiment of the present application;

[0045] Figure 2 is a flowchart of another control method of an oil fume purifier provided by the embodiment of the present application;

[0046] Figure 3 is a specific flowchart of a control method of an oil fume purifier provided by the embodiment of the present application;

[0047] Figure 4 is a structural schematic diagram of a control device of an oil fume purifier provided by the embodiment of the present application;

[0048] Figure 5 is a structural schematic diagram of an oil fume purifier provided by the embodiment of the present application. DETAILED DESCRIPTION

[0049] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should be within the scope of protection of the present application.

[0050] It should be noted that the terms "first", "second", and the like in the description and in the claims of the present application and above-described accompanying drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0051] Figure 1 is a flowchart of a control method of an oil fume purifier provided by an embodiment of the present application. The embodiment can be applicable to the case of maintaining the oil fume purifier, and the method can be executed by a processor in the oil fume purifier. As shown in Figure 1 , the control method comprises the following steps:

[0052] S101, acquiring a current working voltage and a current working current of a load circuit.

[0053] Specifically, the oil fume purifier mainly comprises a load circuit and a main control board connected electrically. The load circuit can comprise at least one purification load for purifying the odor of oil fume. The main control board is used to control the working state of the load circuit and to interact information with other devices. For example, taking a UV purifier as an example, the purification load is specifically a UV lamp, and the entire load circuit can comprise one or more UV lamps, and the specific number can be reasonably set according to the purification demand of the purifier. When the load circuit comprises multiple purification loads, the purification loads are usually arranged in parallel.

[0054] Among them, the current working voltage is the voltage across the load circuit at the current time. The voltage across the load circuit is usually the same as the power supply voltage, and the real-time monitoring of the working voltage of the load circuit can be realized by acquiring the power supply voltage in real time. For example, a voltage acquisition circuit can be arranged on the main control board to acquire the power supply voltage in real time. For example, the power supply voltage can be acquired by an isolation transformer, a linear light coupling, or a resistance voltage division type acquisition, and the present embodiment is not limited thereto.

[0055] Wherein, the current working current is the total current flowing through the entire load circuit. Exemplarily, a current acquisition circuit can be arranged on the main control panel to acquire the working current of the load circuit in real time. Exemplarily, the total current of the load circuit can be acquired through a current transformer, a current sensing semiconductor device, a Hall sensing device, resistance acquisition, resistance acquisition combined with operation, and the like, and the embodiments of the present application are not limited thereto.

[0056] By acquiring the current working voltage and the current working current of the load circuit, the current running state of the load circuit can be determined according to the current electrical parameters of the load circuit, and then it can be determined whether the purification load in the load circuit needs to be maintained.

[0057] S102, determine the current theoretical current of the load circuit according to the current working voltage, and determine the current current deviation according to the current working current and the current theoretical current.

[0058] Wherein, the current theoretical current refers to the theoretical current value of the load circuit under the current working voltage. Exemplarily, the current theoretical current can be calculated according to the current working voltage, the total resistance of the load circuit, and Ohm's law.

[0059] Wherein, the current current deviation can be understood as the absolute value of the difference between the current working current and the current theoretical current, indicating the deviation value of the current working current relative to the current theoretical current.

[0060] In the running process of the oil fume purifier, the power supply voltage can fluctuate. In this embodiment, the current theoretical current of the load circuit is first determined according to the current working voltage (i.e. the current power supply voltage), and then the deviation value of the current working current relative to the current theoretical current (i.e. the current current deviation) is calculated. The running state of the load circuit can be determined through the current current deviation, and then it can be determined whether the purification load in the load circuit needs to be maintained, which will be described in detail in S103.

[0061] The fluctuation of the power supply voltage will affect the stability of the working current of the load circuit. When the power supply voltage is different, the working current will have a large deviation. If the working state of the purification load is simply determined by the size of the current working current, it is easy to cause misjudgment. In comparison, the current theoretical current under the current working voltage (i.e. the current theoretical current) is calculated through the current working voltage in this embodiment, and then the working state of the purification load is determined through the difference between the current working current and the current theoretical current (i.e. the current current deviation). The influence of the fluctuation of the power supply voltage can be eliminated, and misjudgment can be avoided.

[0062] S103, if the current current deviation is greater than a preset error threshold, a maintenance instruction information is sent.

[0063] The preset error threshold is a positive number, which represents an error value allowed for the actual current of the device in operation compared with the theoretical current. Under normal working conditions, the absolute value of the difference between the actual current and the theoretical current is not greater than the error value, and the value can be determined according to experience or other ways, which is not limited in the embodiment of the present application.

[0064] Specifically, if the current deviation is less than the preset error threshold, it indicates that the current value of the load circuit is in the normal working range. If the current deviation is greater than the preset error threshold, it indicates that the deviation between the current working current and the current theoretical current of the load circuit is too large and has exceeded the allowed error range, and maintenance is needed. The maintenance indication information can be sent to prompt the staff to maintain the purification load. For example, the particles adhered to the surface of the purification load can be removed to improve the purification effect of the oil fume odor. Of course, the purification load can also be replaced if necessary.

[0065] For example, a maintenance indication lamp can be arranged on the oil fume purifier. When it is determined that maintenance is needed, the maintenance indication lamp can be controlled to flicker or be always on to prompt the staff that maintenance is needed. In addition, the oil fume purifier can be in communication connection with a remote controller or a cloud platform. When it is determined that maintenance is needed, the maintenance indication information can be sent to the remote controller or the cloud platform to prompt the staff to maintain the purification load in time.

[0066] In summary, in the embodiment of the present application, the current working voltage and the current working current of the load circuit are obtained, the current theoretical current of the load circuit is determined according to the current working voltage, the current deviation is determined according to the current working current and the current theoretical current, and the maintenance indication information is sent when the current deviation is greater than the preset error threshold to prompt the staff to maintain the oil fume purifier. This scheme can eliminate the misjudgment caused by the fluctuation of the power supply voltage, improve the accuracy of the judgment of the working condition of the load circuit, and thus can timely and accurately judge whether the oil fume purifier needs maintenance, avoiding the situation of early maintenance or untimely maintenance.

[0067] Figure 2 is a flowchart of another control method of the oil fume purifier provided by the embodiment of the present application, which is further optimized on the basis of the above-mentioned embodiment, and the same parts will not be described in detail here. As shown in Figure 2 the embodiment, the control method can include the following steps:

[0068] S201, obtaining the current working voltage and the current working current of the load circuit.

[0069] S202, determining the current theoretical current of the load circuit according to the current working voltage, and determining the current deviation according to the current working current and the current theoretical current.

[0070] Optionally, the load circuit comprises a plurality of purification loads arranged in parallel, and the determining the current theoretical current of the load circuit according to the current working voltage can comprise the following steps:

[0071] a. determining the resistance value of the purification load according to the rated electrical parameter of the purification load;

[0072] b. determining a theoretical current value of one purification load according to the current working voltage and the resistance value of the purification load;

[0073] c. obtaining the number of the purification loads in the load circuit, and determining the current theoretical current of the load circuit according to the number of the purification loads and the theoretical current value.

[0074] Specifically, the rated electrical parameters of the plurality of purification loads in the load circuit are consistent. The rated electrical parameters can be rated voltage and rated power, and the resistance value of the purification load can be calculated by combining the power calculation formula. Further, the theoretical current value of one purification load can be calculated according to the current working voltage and the resistance value of the purification load by combining Ohm's law. Further, since the plurality of purification loads are in parallel, the current theoretical current of the load circuit can be obtained by obtaining the number of the purification loads, and the current theoretical current is the sum of the theoretical current values of the plurality of purification loads. Specifically, the current theoretical current is n times (n represents the number of the purification loads) of the theoretical current value of one purification load.

[0075] The number of the purification loads can be obtained in various ways, such as by setting an encoder, key input, or designing a collection tool to directly import the number of the purification loads stored in the memory, and the embodiments of the present application do not limit this.

[0076] S203, determining whether the current current deviation is greater than the preset error threshold, if yes, executing S204, and if not, returning to execute S201.

[0077] Since there is a certain process difference between the purification loads, the factory usually formulates a reasonable current error value, and accordingly, the preset error threshold can be determined by referring to the current error value.

[0078] Optionally, when the load circuit comprises a plurality of purification loads arranged in parallel, the control method further comprises: obtaining the number of the purification loads in the load circuit, and determining the preset error threshold according to the number of the purification loads. Since the plurality of purification loads are in parallel, the preset error threshold can be calculated by summing the current error values of the plurality of purification loads. Specifically, the preset error threshold is n times (n represents the number of the purification loads) of the current error value of one purification load.

[0079] In the running process of the oil fume purifier, overcurrent (overcurrent) and even short circuit faults may occur, and open circuit faults may also occur. At this time, the current current deviation is also greater than the preset error threshold. If only the purification load is maintained and maintained, it is difficult to ensure the purification effect, and the load circuit needs to be repaired and at least part of the purification load needs to be replaced. Therefore, after determining that the current current deviation is greater than the preset error threshold, it can be determined whether the load circuit has an overcurrent / short circuit or open circuit fault, and the actual running condition of the load circuit is further analyzed to provide more accurate indication information, so that the staff can make correct maintenance measures and improve the maintenance efficiency, as shown in S204-S210.

[0080] S204, determine the overcurrent fault threshold according to the current theoretical current, the preset error threshold and the preset overcurrent fault parameter.

[0081] S205, determine whether the current working current is greater than the overcurrent fault threshold; if yes, execute S206, if no, execute S207.

[0082] S206, send the fault indication information.

[0083] The specific value of the overcurrent fault parameter is pre-set, which can be set according to experience or by other means, and the embodiments of the present application do not limit it. Specifically, the overcurrent fault threshold is equal to the sum of the current theoretical current, the preset error threshold and the overcurrent fault parameter. If the current working current is greater than the current theoretical current, and the difference between the two is greater than the sum of the preset error threshold and the overcurrent fault parameter, that is, the current working current is greater than the overcurrent fault threshold, it can be determined that the load circuit is overcurrent and even has a short circuit, and is in an overload state, and the fault indication information needs to be sent. At this time, the maintenance indication information can not be sent, so that the staff knows that the load circuit has a circuit fault at this time, and simple maintenance cannot solve the problem, and circuit maintenance is needed, thereby improving the maintenance efficiency.

[0084] For example, a corresponding fault indication lamp can be provided on the oil fume purifier. When it is determined that an overcurrent fault occurs, the staff can be prompted to repair by controlling the fault indication lamp to flash or always on. In addition, the oil fume purifier can be in communication connection with a remote controller or a cloud platform. When it is determined that a fault needs to be repaired, the fault indication information can be sent to the remote controller or the cloud platform to prompt the staff to repair the oil fume purifier in time.

[0085] It should be noted that the short-circuit fault and the overcurrent fault can correspond to different sizes of overcurrent fault parameters, and optionally, the overcurrent fault parameter corresponding to the short-circuit fault is greater than the overcurrent fault parameter corresponding to the overcurrent fault. It should be noted that the short-circuit fault and the overcurrent fault can send different fault indication information, or can send the same fault indication information, and the embodiments of the present application do not limit this.

[0086] S207, determining an open-circuit fault threshold according to the current theoretical current, the preset error threshold and the preset open-circuit fault parameter.

[0087] S208, determining whether the current working current is less than the open-circuit fault threshold, and if so, performing S209, otherwise, performing S210.

[0088] S209, sending fault indication information.

[0089] S210, sending maintenance indication information.

[0090] The specific value of the open-circuit fault parameter is pre-set, which can be set according to experience or by other means, and the embodiments of the present application do not limit this. Specifically, the open-circuit fault threshold is equal to the difference between the current theoretical current, the preset error threshold and the open-circuit fault parameter, wherein the current theoretical current is the minuend, and the preset error threshold and the open-circuit fault parameter are both minuends. If the current working current is less than the current theoretical current, and the difference between the two is greater than the sum of the preset error threshold and the open-circuit fault parameter, that is, the current working current is less than the open-circuit fault threshold, it can be determined that the load circuit has an open circuit, part of the purification load has an open circuit or is damaged, and cannot achieve the purification effect, and needs to send fault indication information. At this time, the maintenance indication information can not be sent.

[0091] For example, a corresponding fault indication lamp can be provided on the oil fume purifier, and when an overcurrent fault is determined to occur, the staff can be prompted to need maintenance by controlling the fault indication lamp to flicker or be always on. In addition, the oil fume purifier can be in communication connection with a remote controller or a cloud platform, and when a fault is determined to occur and needs to be repaired, the fault indication information can be sent to the remote controller or the cloud platform to prompt the staff to timely repair the oil fume purifier.

[0092] It should be noted that the overcurrent fault and the open-circuit fault can correspond to the same indicator lamp, or can correspond to different indicator lamps, and when sending the fault indication information to the remote controller or the cloud platform, the staff can be prompted by the same display mode or by different display modes, and the embodiments of the present application do not limit this. In an embodiment, the overcurrent fault and the open-circuit fault can also send fault indications to the staff in different ways, so as to facilitate the staff to quickly troubleshoot the faulty purification load and improve the maintenance efficiency.

[0093] It also needs to be explained that, Figure 2 Only the judgment of overcurrent fault and open circuit fault in sequence is taken as an example, in other embodiments, when it is determined that the current deviation is greater than the preset error threshold, the judgment of overcurrent fault and open circuit fault can also be performed simultaneously, as long as any one of the two fault conditions is met, the fault indication information is sent, and the maintenance indication information is no longer sent, at this time the load circuit can be repaired, the faulty lamp tube is replaced, otherwise, the maintenance indication information is sent, and the lamp tube is maintained, such as wiping the surface particles.

[0094] On the basis of any of the above embodiments, optionally, the control method further comprises: receiving a start-stop instruction of the control end, and controlling the start or stop of the oil fume purifier according to the start-stop instruction.

[0095] It can be understood that the collection and analysis of the above-mentioned electrical parameters are performed after the start of the oil fume purifier to monitor the running condition of the oil fume purifier in real time. Wherein, the start and stop of the oil fume purifier can be controlled according to the start-stop instruction of the control end.

[0096] Among them, the control end can include at least one of a local controller, a remote controller, a cloud platform and an extractor hood. Correspondingly, according to the start-stop instruction to control the start or stop of the oil fume purifier, the following steps can be included:

[0097] a. If the start-stop instruction of any control end is a start instruction, control the oil fume purifier to start;

[0098] b. If the start-stop instruction of all control ends is a stop instruction, control the oil fume purifier to stop.

[0099] Among them, the local controller can be understood as a switch controller on the oil fume purifier device, such as a switch key. The remote controller can be a switch controller connected to the outside through a cable for the convenience of the user to start and stop the oil fume purifier, or an electronic control device such as a computer connected through wired or wireless communication. At least one of the local controller, the remote controller, the cloud platform and the extractor hood can be used to control the start and stop of the oil fume purifier. By setting multiple control ends to control the start and stop of the oil fume purifier, the control flexibility can be improved.

[0100] Specifically, whether the oil fume purifier has one control end or multiple control ends, when the start-stop instruction of any control end is a start instruction, it indicates that the oil fume odor purification is needed, the oil fume purifier can be controlled to start, and then the current working voltage and current and other parameters can be collected in real time to judge the running condition and maintain and repair the oil fume purification equipment in time; if the start-stop instruction of all control ends is a stop instruction, it indicates that there is no oil fume odor purification demand, the oil fume purifier can be controlled to stop, and the running condition judgment process also ends.

[0101] When the control terminal comprises the range hood, optionally, the step of controlling the start or stop of the oil fume purifier according to the start-stop instruction comprises:

[0102] a. obtaining fan current data of the range hood;

[0103] b. if the fan current data is greater than or equal to a first current threshold, controlling the oil fume purifier to start.

[0104] It can be understood that the start of the range hood indicates that there is a demand for purifying the odor of the oil fume, and therefore, the oil fume purifier can be controlled to start after receiving the signal of the start of the range hood, regardless of whether the start instruction is sent by other control terminals. In this way, the linkage control of the range hood and the oil fume purifier can be realized, and the purification of the odor of the oil fume can be performed in time.

[0105] Specifically, the fan current data of the range hood can be obtained, and whether the range hood is started can be determined according to the fan current data of the range hood. When the fan current data is greater than or equal to the first current threshold, it indicates that the range hood is started, and the oil fume purifier can be controlled to start. The specific value of the first current threshold can be set by the user, and the embodiments of the present application do not limit this. For example, the fan current data can be collected by a fan current collection device, and the fan current data is sent to the processor of the oil fume purifier to obtain the fan current data. For example, the fan current can be collected by a current transformer, a current sensing semiconductor device, a Hall sensing device, resistance collection, resistance collection and operation combination, and the embodiments of the present application do not limit this.

[0106] When the oil fume purifier has multiple control terminals, and the multiple control terminals comprise the range hood, if the fan current data is less than the first current threshold, and the start-stop instructions of other control terminals are all stop instructions, the oil fume purifier is controlled to stop.

[0107] For example, Figure 3 is a specific flowchart of a control method of an oil fume purifier provided by the embodiments of the present application, as shown in Figure 3As shown, below, taking the oil fume purifier as the UV purifier, and taking the UV lamp as the purifying load, a brief introduction to the specific control process is as follows: after the UV purifier is powered on and waits and is networked, referring to S301, the number n of the UV lamp of the encoder can be read first, and the lamp tube internal resistance R can be calculated in combination with the rated power and the rated voltage of the UV lamp; referring to S302 and S303, the information of each control end is collected, and it is judged whether there is a starting instruction, as long as the starting instruction of one of the control ends is obtained, the UV purifier is started immediately; referring to S304, the power supply voltage can be collected in real time, and the theoretical reference value Iz of the total current (i.e. the above-mentioned "current theoretical current") can be calculated in real time with the current power supply voltage (i.e. the above-mentioned "current working voltage"); referring to S305, the total theoretical current error value ΔIz of the lamp tube (i.e. the above-mentioned "preset error threshold value", and "ΔIwc" in the calculation formula represents the theoretical current error value of one lamp tube) can be calculated, and at the same time, the actual total current value Inz of all lamp tubes (i.e. the above-mentioned "current working current") can be read in real time; referring to S306, the actual total current value Inz and the theoretical current value Iz are compared to obtain the actual current difference value ΔInz (i.e. the above-mentioned "current current deviation"); referring to S307, the actual current difference value ΔInz and the theoretical current error value ΔIz are compared, if ΔInz > ΔIz, a lamp tube maintenance prompt is sent, if ΔInz < ΔIz, it indicates that the lamp tube is normal (when ΔInz = ΔIz, the lamp tube can also be considered normal); next, referring to S308, the overcurrent fault parameter Imax and the open circuit fault parameter Imin can also be designed, and the current actual current Inz is used for fault judgment, if Inz > Iz + ΔIz + Imax, it indicates that the UV lamp is overcurrent, and a fault prompt needs to be sent, if Inz < Iz - ΔIz - Imin, it indicates that there is an open circuit or damage of the UV, and a fault prompt also needs to be sent, at this time, the maintenance prompt can not be sent; finally, referring to S309, if all control ends have no starting instruction, or all control ends are stop instructions, the UV purifier is turned off. It can be understood that as long as the UV purifier is in the starting state, the power supply voltage and the actual total current need to be collected in real time, and the running status of the UV purifier is monitored according to the above-mentioned judgment logic, so that the UV purifier can be repaired and maintained in time and accurately.

[0108] Based on any of the above embodiments, optionally, maintenance instructions can be issued periodically to perform periodic maintenance on the fume purifier. Compared to existing periodic maintenance, the duration of this period can be appropriately increased. This allows maintenance instructions to be sent periodically based on the operating time, provided the fume purifier has accumulated a long operating time, the purification load is monitored to be fault-free, and maintenance is not required. This prevents particulate matter from adhering to the UV lamps and hindering the UV light beam's ability to decompose fumes and odors during prolonged operation. Specifically, an accumulated operating time method can be used. Before a power outage, the processor stores the current accumulated time in memory, allowing it to be read upon the next power-on, ensuring continuous timing of the operating time. When the accumulated time reaches the usage cycle, a maintenance instruction is issued.

[0109] Based on the same inventive concept, the present invention also provides a control device for an oil fume purifier. Figure 4 This is a schematic diagram of the structure of a control device for an oil fume purifier provided in an embodiment of the present invention, as shown below. Figure 4 As shown, the control device includes: a parameter acquisition module 401, used to acquire the current operating voltage and current operating current of the load circuit; a calculation module 402, used to determine the current theoretical current of the load circuit based on the current operating voltage, and to determine the current current deviation based on the current operating current and the current theoretical current; and a control module 403, used to send maintenance instruction information when the current current deviation is greater than a preset error threshold.

[0110] The control device provided in the embodiments of the present invention can execute the control method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method, which will not be described in detail here.

[0111] Based on the above embodiments, optionally, the load circuit includes multiple purification loads arranged in parallel; the calculation module 402 is specifically used to determine the resistance value of the purification load according to the rated electrical parameters of the purification load; determine the theoretical current value of a purification load according to the current operating voltage and the resistance value of the purification load; obtain the number of purification loads in the load circuit, and determine the current theoretical current of the load circuit according to the number of purification loads and the theoretical current value.

[0112] Optionally, the load circuit includes multiple purification loads connected in parallel; the calculation module 402 is also used to obtain the number of purification loads in the load circuit and determine a preset error threshold based on the number of purification loads.

[0113] Optionally, after determining that the current current deviation is greater than the preset error threshold, the calculation module 402 is further used to determine the overcurrent fault threshold based on the current theoretical current, the preset error threshold, and the preset overcurrent fault parameters; the control module 403 is further used to send fault indication information when the current operating current is greater than the overcurrent fault threshold.

[0114] Optionally, after determining that the current current deviation is greater than the preset error threshold, the calculation module 402 is further configured to determine an open-circuit fault threshold according to the current theoretical current, the preset error threshold and a preset open-circuit fault parameter; and the control module 403 is further configured to send fault indication information when the current working current is less than the open-circuit fault threshold.

[0115] Optionally, the control module 403 is further configured to receive start-stop instructions of the control end, and control the start or stop of the oil fume purifier according to the start-stop instructions.

[0116] Optionally, the control end includes at least one of a local controller, a remote controller, a cloud platform and an extractor hood; and the control module 403 is specifically configured to control the oil fume purifier to start when the start-stop instruction of any control end is a start instruction, and control the oil fume purifier to stop when the start-stop instructions of all control ends are stop instructions.

[0117] Optionally, the control end includes an extractor hood; and the parameter acquisition module 401 is further configured to acquire fan current data of the extractor hood; and the control module 403 is configured to control the oil fume purifier to start when the fan current data is greater than or equal to a first current threshold.

[0118] Optionally, the control module 403 is further configured to periodically send maintenance indication information to periodically maintain the oil fume purifier.

[0119] Based on the same inventive concept, the application further provides an oil fume purifier. Figure 5 is a structural schematic diagram of an oil fume purifier provided by an embodiment of the application, as Figure 5 shown, the oil fume purifier 500 includes a load circuit 510 and a main control board 520 electrically connected with the load circuit 510; the main control board 520 is provided with at least one processor 521, a voltage acquisition circuit 522, a current acquisition circuit 523 and a memory 524, the voltage acquisition circuit 522 is in communication connection with the processor 521 and is used for acquiring a working voltage of the load circuit 510; the current acquisition circuit 523 is in communication connection with the processor 521 and is used for acquiring a working current of the load circuit 510; the memory 524 is in communication connection with the processor 521; the memory 524 stores a computer program executable by the at least one processor 521, and the computer program is executed by the at least one processor 521 to enable the at least one processor 521 to execute the control method provided by any embodiment of the application.

[0120] The memory 524 is a computer readable storage medium, which can be used to store software programs, computer executable programs and modules, such as program instructions / modules of the control method of the oil fume purifier (for example, the parameter acquisition module 401, the calculation module 402 and the control module 403 in the control device of the oil fume purifier). The processor 521 executes various function applications and data processing of the terminal by running the software programs, instructions and modules stored in the memory 524, that is, implements the control method of the oil fume purifier.

[0121] Specifically, as shown in Figure 5 The main control board 520 is further provided with a power supply interface for connecting an external power supply to provide power supply for the load circuit, and the voltage conversion circuit can also supply power to other electronic elements on the main control board 520. The voltage acquisition circuit can acquire the working voltage of the load circuit by acquiring the power supply voltage of the power supply interface. The specific structure of the voltage acquisition circuit is not limited in the embodiment of the present application, and the way of acquiring the power supply voltage by the voltage acquisition circuit is also not limited. For example, the voltage acquisition circuit can acquire the power supply voltage by an isolation transformer, a linear photoelectric device or a resistance voltage divider.

[0122] In addition, the specific structure of the current acquisition circuit 523 is not limited in the embodiment of the present application, and the way of acquiring the working current of the load circuit by the current acquisition circuit is also not limited. For example, the current acquisition circuit can acquire the total current of the load circuit by a current transformer, a current sensing semiconductor device, a Hall sensing device, a resistance acquisition, a combination of resistance acquisition and operation, and the like.

[0123] As shown in Figure 5 Optionally, the main control board 520 is further provided with an analog acquisition circuit, which is in communication connection with the voltage acquisition circuit and the current acquisition circuit, respectively, for analog-to-digital conversion of the external multi-channel analog information, removing the noise interference of the circuit, and providing stable information output for the processor to identify.

[0124] As shown in Figure 5As shown, the oil fume purifier 500 can have multiple control terminals 601, such as a product terminal controller, an external external controller, an external remote controller, and a cloud platform, which are connected to the control interface / communication interface on the main control board 520 through wired or wireless manner to control the start and stop of the oil fume purifier. For example, the product terminal controller can be a switch button on the oil fume purifier, the external external controller can be a switch connected to the kitchen through a cable, the external remote controller can be a computer connected through wired communication, the cloud platform can communicate with the oil fume purifier in a wireless manner, and the oil fume purifier and the remote controller and the cloud platform can exchange information such as maintenance indication information, fault indication information reporting, and oil fume purifier start and stop instructions.

[0125] It should be noted that the specific mode of wired communication and wireless communication is not limited in the embodiment of the present application. For example, the wired communication mode can be 485, 232, etc., and the wireless communication mode can be GPRS (General Packet Radio Service), WIFI, or radio frequency, etc.

[0126] In addition, as shown, Figure 5 As shown, the processor is in communication connection with the fan current acquisition device, and specifically, the fan current acquisition device can be in communication connection with the processor through an analog acquisition circuit to send the acquired fan current of the range hood to the processor, so that the processor determines whether to start the oil fume purifier according to the size of the fan current, realizes the interconnection control of the range hood and the oil fume purifier, and purifies the odor of oil fume in time.

[0127] As shown, Figure 5 The oil fume purifier can include multiple indicator lights, such as maintenance indicator lights, fault indicator lights, running indicator lights, and power indicator lights, etc., to indicate the current state of the oil fume purifier according to the instructions of the processor.

[0128] Optionally, the load circuit includes multiple parallelly arranged purification loads, such as UV lamps, and correspondingly, Figure 5As shown, the main control board 520 is further provided with an encoder 526, which is in communication connection with the processor 521, and is used to determine the number of purification loads in the load circuit, so as to send to the processor for data analysis. Taking the UV purifier as an example, according to the size difference of the purification amount of the UV purifier, different UV purifiers have different numbers of UV lamps, and the present embodiment can adjust the code number of the encoder according to the number of the UV lamps, so that the two are adapted, and the number parameter information of the UV lamps is provided to the processor, so as to facilitate the subsequent data analysis of the processor, which is conducive to the adaptation of the processor and the UV purifier, avoids developing multiple numbers / versions of controllers, and improves the practicability.

[0129] Of course, the way to obtain the number of purification loads is not limited to the way of using the encoder, and in other embodiments, the number of purification loads can also be obtained by key input, or a kind of collection tool is designed to directly import the number of purification loads stored in the memory, and the present embodiment is not limited to this.

[0130] It should be understood that various forms of processes shown above can be used to reorder, add or delete steps. For example, each step described in the present application can be executed in parallel, sequentially or in different order, as long as the desired results of the technical solutions of the present application can be achieved, which is not limited herein.

[0131] The above specific embodiments do not constitute a limitation on the scope of protection of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A control method of an oil fume purifier including a load circuit, characterized by, The control method comprises: acquiring a current working voltage and a current working current of the load circuit; determining a current theoretical current of the load circuit according to the current working voltage, and determining a current current deviation according to the current working current and the current theoretical current; if the current current deviation is greater than a preset error threshold, sending maintenance instruction information; the current working voltage is a power supply voltage at a current time; the preset error threshold is a positive value, and the current current deviation is an absolute value of a difference between the current working current and the current theoretical current.

2. The control method according to claim 1, characterized by, The load circuit comprises a plurality of purification loads arranged in parallel; the determination of the current theoretical current of the load circuit according to the current working voltage comprises: determining a resistance value of the purification load according to a rated electrical parameter of the purification load; determining a theoretical current value of one of the purification loads according to the current working voltage and the resistance value of the purification load; acquiring a number of the purification loads in the load circuit, and determining the current theoretical current of the load circuit according to the number of the purification loads and the theoretical current value.

3. The control method according to claim 1, characterized by, The load circuit comprises a plurality of purification loads arranged in parallel; the control method further comprises: acquiring a number of the purification loads in the load circuit, and determining the preset error threshold according to the number of the purification loads.

4. The control method according to claim 1, characterized by, After determining that the current current deviation is greater than the preset error threshold, the control method further comprises: determining an overcurrent fault threshold according to the current theoretical current, the preset error threshold and a preset overcurrent fault parameter; if the current working current is greater than the overcurrent fault threshold, sending fault instruction information.

5. The control method according to claim 1, characterized by, After determining that the current current deviation is greater than the preset error threshold, the control method further comprises: determining an open-circuit fault threshold according to the current theoretical current, the preset error threshold and a preset open-circuit fault parameter; if the current working current is less than the open-circuit fault threshold, sending fault instruction information.

6. The control method according to claim 1, characterized by, The control method further comprises: receiving a start-stop instruction of a control end, and controlling starting or shutting down of the oil fume purifier according to the start-stop instruction; wherein the control end comprises at least one of a local controller, a remote controller, a cloud platform and an extractor hood; the control of starting or shutting down of the oil fume purifier according to the start-stop instruction comprises: if the start-stop instruction of any one of the control ends is a start instruction, controlling the oil fume purifier to start; if the start-stop instruction of all the control ends is a stop instruction, controlling the oil fume purifier to shut down.

7. The control method according to claim 6, characterized by The control end comprises the extractor hood; the control of starting or shutting down of the oil fume purifier according to the start-stop instruction comprises: acquiring fan current data of the extractor hood; if the fan current data is greater than a first current threshold, controlling the oil fume purifier to start.

8. A control device for an oil fume purifier comprising a load circuit, characterized by The control device comprises: a parameter acquisition module configured to acquire a current working voltage and a current working current of the load circuit; The computing module is configured to determine a current theoretical current of the load circuit according to the current working voltage, and determine a current current deviation according to the current working current and the current theoretical current; The control module is configured to send maintenance instruction information when the current current deviation is greater than a preset error threshold value; The current working voltage is a power supply voltage at a current time; the preset error threshold value is a positive value, and the current current deviation is an absolute value of a difference between the current working current and the current theoretical current.

9. An oil fume purifier, characterized by comprising: The load circuit and a main control panel electrically connected to the load circuit are included; the main control panel is provided with: at least one processor; a voltage acquisition circuit in communication connection with the processor, configured to acquire a working voltage of the load circuit; a current acquisition circuit in communication connection with the processor, configured to acquire a working current of the load circuit; a memory in communication connection with the processor; the memory stores a computer program executable by the at least one processor; the computer program is executed by the at least one processor, so that the at least one processor can execute the control method in any one of claims 1-7.

10. The oil fume purifier according to claim 9, characterized in that, The load circuit includes a plurality of purification loads arranged in parallel; The main control panel is further provided with an encoder in communication connection with the processor, configured to determine a number of the purification loads in the load circuit.

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