Air valve adjusting method of air-conditioned range hood and range hood

Abstract

The present application relates to a kind of air valve adjusting method of air-conditioning range hood, air-conditioning range hood includes casing, oil fume fan, air conditioning system, first smoke channel and second smoke channel are arranged in casing interior and are communicated with the air outlet of oil fume fan, the air outlet of oil fume fan is equipped with air valve, heat exchanger in air conditioning system is arranged in first smoke channel.S1, oil fume fan is opened, judge whether opening air conditioning mode, if yes, then proceed S2;If no, then proceed S3;S2, the temperature T of heat exchanger is detected and obtained, the smoke parameter of oil fume fan air outlet is detected and obtained;According to T and smoke parameter, adjust air valve position;S3, control air valve action, then close first smoke channel, second smoke channel is in full open state.The air valve adjusting method can reduce the pollution to heat exchanger as far as possible while considering the heat dissipation effect.The present application also relates to the range hood of air valve adjusting method of application this air-conditioning range hood.

Description

Technical Field

[0001] This invention relates to a method for adjusting the air valve of an air-conditioning type range hood, and also to a range hood using this air valve adjustment method. Background Technology

[0002] To improve the kitchen working environment and make more efficient use of kitchen space, various air-conditioning-style range hoods have emerged in the current technology, which can regulate the working temperature in the kitchen space. However, air-conditioning-style range hoods have significant heat dissipation problems. If they cannot dissipate heat in time during use, the energy efficiency of the air conditioner will be greatly reduced.

[0003] Existing technologies disclose air-conditioning range hoods with a dual-channel structure, such as the Chinese invention patent application CN115342402A (application number 202210014286.3) entitled "A method for controlling the air valve of an air-conditioning range hood". The disclosed range hood includes a casing, inside which a range hood fan is installed. The casing has a smoke exhaust channel and an air outlet channel that are isolated from each other. The smoke exhaust channel includes a first smoke exhaust channel and a second smoke exhaust channel. An air valve is installed at the air outlet of the range hood fan to switch the air outlet of the range hood fan from being connected to the first smoke exhaust channel or the second smoke exhaust channel. A heat exchanger of the air conditioning component is installed in the first smoke exhaust channel. For the air-conditioning range hood operating in cooling mode, the heat exchanger in the first smoke exhaust channel becomes a condenser. Thus, the first smoke exhaust channel constitutes a heat dissipation channel, and the second smoke exhaust channel constitutes a direct exhaust channel. When operating in air conditioning mode, taking cooling mode as an example, switching the air valve opens the first exhaust duct and closes the second exhaust duct. The cooking fumes enter the first exhaust duct and pass through the condenser, dissipating heat. In range hood mode, switching the air valve closes the first exhaust duct and opens the second exhaust duct. The condenser does not need cooling, and the cooking fumes are directly exhausted through the second exhaust duct. This air conditioning-type range hood's air valve control method has the following problems:

[0004] 1. It did not take into account that the fumes contain a lot of oil, which will cause oil stains to stick to the surface of the heat exchanger after long-term use, thus reducing the heat exchange efficiency and affecting the performance.

[0005] 2. The impact of oil fume temperature on the heat exchanger's heat dissipation performance was not considered. Oil fume temperature is generally higher than ambient temperature, which leads to a decrease in the heat exchanger's heat exchange efficiency and affects its heat exchange performance.

[0006] 3. The impact of the heat exchanger's own temperature and the range hood's airflow on cooling performance was not considered. Summary of the Invention

[0007] The first technical problem to be solved by the present invention is to provide a method for adjusting the air valve of an air-conditioning range hood that can take into account both heat dissipation effect and minimize the amount of oil stains adhering to the heat exchanger, in contrast to the above-mentioned prior art.

[0008] The second technical problem to be solved by the present invention is to provide a range hood that applies the aforementioned air valve adjustment method of an air-conditioning type range hood, in contrast to the prior art.

[0009] The technical solution adopted by the present invention to solve the first technical problem mentioned above is as follows: a method for adjusting the air valve of an air-conditioning type range hood, wherein the air-conditioning type range hood includes a casing, a range hood fan and an air conditioning system are installed inside the casing, and a smoke exhaust channel is provided inside the casing. The smoke exhaust channel includes a first smoke exhaust channel and a second smoke exhaust channel connected to the air outlet of the range hood fan. An air valve for adjusting the opening of the first and second smoke exhaust channels is installed at the air outlet of the range hood fan. The heat exchanger in the air conditioning system is disposed in the first smoke exhaust channel. The method is characterized by including the following steps:

[0010] S1. Turn on the range hood and determine if the air conditioning mode is on. If yes, proceed to S2; otherwise, proceed to S3.

[0011] S2. Detect and obtain the temperature T of the heat exchanger, and detect and obtain the flue gas parameters at the air outlet of the range hood; adjust the position of the air valve according to T and the flue gas parameters.

[0012] S3. Control the air valve to close the first smoke exhaust duct, while the second smoke exhaust duct is fully open.

[0013] Preferably, when the air conditioning is on, if it is in the air conditioning-only mode, the smoke parameter in S2 is the smoke concentration; if it is in the combined working mode of air conditioning and fume extraction, the smoke parameter in S2 includes smoke concentration and smoke temperature.

[0014] As an improvement, the operating method in the air conditioning-only mode includes the following steps:

[0015] SA1. Detect and obtain the temperature T of the heat exchanger, and detect and obtain the smoke concentration n at the air outlet of the fume extractor.

[0016] Compare T with the first set temperature T1;

[0017] If T < T1, then proceed with SA2;

[0018] If T≥T1, then perform SA3;

[0019] SA2. Adjust the position of the air valve based on the flue gas concentration n and the working time h of the air conditioning system;

[0020] SA3. Adjust the position of the damper based on the flue gas concentration n;

[0021] The positions of the dampers include positions A, B, C, D, and E. When the damper is in position A, the opening degree of the first smoke exhaust channel is KA1, and the opening degree of the second smoke exhaust channel is KA2. When the damper is in position B, the opening degree of the first smoke exhaust channel is KB1, and the opening degree of the second smoke exhaust channel is KB2. When the damper is in position C, the opening degree of the first smoke exhaust channel is KC1, and the opening degree of the second smoke exhaust channel is KC2. When the damper is in position D, the opening degree of the first smoke exhaust channel is KD1, and the opening degree of the second smoke exhaust channel is KD2. When the damper is in position E, the opening degree of the first smoke exhaust channel is KE1, and the opening degree of the second smoke exhaust channel is KE2. Furthermore, KA1 < KA2, KB1 < KB2, KD1 > KD2, KE1 > KE2; KA1 < KB1 < KC1 < KD1 < KE1; KA2 > KB2 > KC2 > KD2 > KE2.

[0022] As an improvement, in step SA2, the real-time flue gas concentration n is compared with the first flue gas concentration threshold N1 and the second flue gas concentration threshold N2, where N1 < N2;

[0023] If n < N1, the working time h of the air conditioning system is compared with the working time threshold H1. If h < H1, the air valve is controlled to move to position E, thereby closing the second smoke exhaust duct, while the first smoke exhaust duct is fully open. If h ≥ H1, the air valve is controlled to move to position D, thereby controlling the opening degree of the second smoke exhaust duct to KD2, while the opening degree of the first smoke exhaust duct is KD1, where KD1 > KD2.

[0024] If N1≤n≤N2, the working time h of the air conditioning system is compared with the working time threshold H1. If h

[0025] If n > N2, the control valve moves to position B, thereby controlling the opening of the second smoke exhaust channel to KB2, while the opening of the first smoke exhaust channel is KB1, KB1 < KC1, KB2 > KC2, and KB1 < KB2.

[0026] As an improvement, in step SA3, the real-time flue gas concentration n is compared with the second flue gas concentration threshold N2;

[0027] If n≤N2, the control damper moves to position E, thereby closing the second smoke exhaust duct, while the first smoke exhaust duct is fully open; ​

[0028] If n > N2, the control valve moves to position C, thereby controlling the opening of the second smoke exhaust duct to KC2, while the opening of the first smoke exhaust duct is KC1.

[0029] As an improvement, the working method in the combined working mode of turning on the air conditioner and turning on the fume extractor includes the following steps:

[0030] SB1. Detect and obtain the temperature T of the heat exchanger, detect and obtain the smoke concentration n and smoke temperature s at the air outlet of the range hood, and detect and obtain the fan speed v of the range hood;

[0031] Compare T with the first set temperature T1 and the second set temperature T2;

[0032] If T > T1, then perform SB2;

[0033] If T2≤T≤T1, then perform SB3;

[0034] If T < T2, then perform SB4;

[0035] SB2. Adjust the position of the air valve based on the smoke concentration n and the range hood fan speed v;

[0036] SB3. Adjust the position of the air valve based on the flue gas concentration n, flue gas temperature s, and range hood fan speed v;

[0037] SB4. Adjust the position of the air valve based on the flue gas concentration n, flue gas temperature s, and range hood fan speed v;

[0038] The positions of the dampers include positions A, B, C, D, and E. When the damper is in position A, the opening degree of the first smoke exhaust channel is KA1, and the opening degree of the second smoke exhaust channel is KA2. When the damper is in position B, the opening degree of the first smoke exhaust channel is KB1, and the opening degree of the second smoke exhaust channel is KB2. When the damper is in position C, the opening degree of the first smoke exhaust channel is KC1, and the opening degree of the second smoke exhaust channel is KC2. When the damper is in position D, the opening degree of the first smoke exhaust channel is KD1, and the opening degree of the second smoke exhaust channel is KD2. When the damper is in position E, the opening degree of the first smoke exhaust channel is KE1, and the opening degree of the second smoke exhaust channel is KE2. Furthermore, KA1 < KA2, KB1 < KB2, KD1 > KD2, KE1 > KE2; KA1 < KB1 < KC1 < KD1 < KE1; KA2 > KB2 > KC2 > KD2 > KE2.

[0039] As an improvement, in step SB2, the real-time flue gas concentration n is compared with the third flue gas concentration threshold N3;

[0040] If n < N3, it is determined that the heat exchanger needs heat dissipation. Then, the position of the air valve is adjusted according to the fan speed v of the range hood. Under the condition that the opening of the first exhaust channel is greater than the first opening threshold, the larger v is, the smaller the opening of the first exhaust channel is controlled.

[0041] If n≥N3, the control valve moves to position C, thereby controlling the opening of the second smoke exhaust duct to KC2, while the opening of the first smoke exhaust duct is KC1.

[0042] As an improvement, in step SB3, the temperature difference value d = T - s is calculated, and d is compared with the set first temperature difference threshold D1;

[0043] If d≤D1, it is determined that the current flue gas cannot effectively dissipate heat from the heat exchanger. The air valve is controlled to move to position B, thereby controlling the opening of the second flue gas passage to KB2, while the opening of the first flue gas passage is KB1.

[0044] If d > D1, then calculate the damper opening influence factor p, p = k1*d + k2*n + k3*(dn / dt), where k1, k2, and k3 represent different calculation coefficients, and dn / dt represents the change in flue gas concentration n relative to time.

[0045] Compare p with the threshold value of the first air valve opening influence factor p1. If p < p1, then adjust the air valve position according to the range hood fan speed v. Under the condition that the first smoke exhaust channel is controlled to be open at a degree greater than the second opening threshold, the larger v is, the smaller the opening degree of the first smoke exhaust channel is controlled.

[0046] If p≥p1, the control valve is activated to position B, thereby controlling the opening of the second smoke exhaust duct to KB2, while the opening of the first smoke exhaust duct is KB1.

[0047] As an improvement, in step SB4, the temperature difference value d = T - s is calculated, and d is compared with the set second temperature difference threshold D2.

[0048] When d≥D2, calculate the damper opening influence factor p, p=k1*d+k2*n+k3*(dn / dt), where k1, k2, and k3 represent different calculation coefficients, and dn / dt represents the change of flue gas concentration n relative to time;

[0049] Compare p with the threshold p2 of the second air valve opening influence factor. If p < p2, control the air valve to move to position C, thereby controlling the opening of the second smoke exhaust channel to KC2, while the opening of the first smoke exhaust channel is KC1.

[0050] If p≥p2, the control valve is moved to position B, thereby controlling the opening of the second smoke exhaust duct to KB2, while the opening of the first smoke exhaust duct is KB1.

[0051] If d≤D2, the real-time flue gas concentration n is compared with the fourth flue gas concentration threshold N4.

[0052] If n < N4, the air conditioning system is judged to be in good working condition. Then, the position of the air valve is adjusted according to the fan speed v of the range hood. Under the condition that the opening of the first smoke exhaust channel is greater than the second opening threshold, the larger v is, the smaller the opening of the first smoke exhaust channel is controlled.

[0053] If n≥N4, it is determined that the current oil fume concentration is too high, and the air valve is controlled to move to position B, thereby controlling the opening of the second exhaust channel to KB2, while the opening of the first exhaust channel is KB1.

[0054] Preferably, when in air conditioning-only mode, the speed of the range hood fan is controlled to be V1;

[0055] When the range hood is in either the oil fume extraction mode or the combined operation mode of the air conditioner and oil fume extraction, the speed of the range hood is controlled at V2, where V2 > V1.

[0056] The technical solution adopted by the present invention to solve the second technical problem mentioned above is as follows: a range hood, including a housing, a controller, and a memory, wherein a range hood fan and an air conditioning system are installed inside the housing, and a smoke exhaust channel is provided inside the housing. The smoke exhaust channel includes a first smoke exhaust channel and a second smoke exhaust channel connected to the air outlet of the range hood fan. A damper for adjusting the opening of the first and second smoke exhaust channels is installed at the air outlet of the range hood fan. A detection device for detecting smoke parameters is also provided at the air outlet of the range hood fan. A heat exchanger in the air conditioning system is located in the first smoke exhaust channel, and a first temperature sensor is provided on the heat exchanger.

[0057] The range hood, air valve, detection device, first temperature sensor, and memory are all communicatively connected to the controller. The memory stores a program that implements the air valve adjustment method of the air-conditioning range hood as described above. The controller can retrieve and execute the program in the memory.

[0058] Preferably, the detection device includes a second temperature sensor and a flue gas concentration sensor, wherein the second temperature sensor and the flue gas concentration sensor are respectively communicatively connected to the controller.

[0059] Compared with the prior art, the advantages of the present invention are as follows: In the application environment of the kitchen, the air valve adjustment method of the air-conditioning range hood can adjust the opening of the air valve according to the smoke parameters when working in air-conditioning mode, so that the opening of the air valve can not only take into account the heat dissipation effect, but also improve the cleanliness of the heat exchanger in the air-conditioning range hood in the oily smoke environment, and minimize the pollution of the heat exchanger caused by oily smoke that cannot bring high heat dissipation efficiency.

[0060] The range hood that uses the air valve adjustment method of this air-conditioning range hood can ensure effective heat dissipation of the heat exchanger when using an air conditioning system, while also reducing the pollution of the heat exchanger by oil fumes and extending the cleaning cycle. Attached Figure Description

[0061] Figure 1 This is a schematic diagram of the structure of the range hood in an embodiment of the present invention.

[0062] Figure 2 This is a schematic diagram showing the air valve in different positions in an embodiment of the present invention.

[0063] Figure 3 This is a flowchart of the air valve adjustment method in the air conditioning-only mode in an embodiment of the present invention.

[0064] Figure 4 This is a flowchart of the air valve adjustment method in the combined working mode of turning on the air conditioner and turning on the fume extractor in an embodiment of the present invention. Detailed Implementation

[0065] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0066] like Figure 1 As shown, the range hood in this embodiment includes a housing, a controller, and a memory. A range hood fan 1 and an air conditioning system are installed inside the housing. The housing also has exhaust ducts, including a first exhaust duct 2 and a second exhaust duct 3 connected to the outlet of the range hood fan 1. A damper 4 is installed at the outlet of the range hood fan 1 to adjust the opening of the first exhaust duct 2 and the second exhaust duct 3. In this embodiment, the inlets of the first exhaust duct 2 and the second exhaust duct 3 are adjacent to each other. The damper 4 is located at the junction of the first exhaust duct 2 and the second exhaust duct 3. Adjusting the position of the damper 4 allows for simultaneous adjustment of the opening of both the first exhaust duct 2 and the second exhaust duct 3; that is, when the opening of one exhaust duct increases, the opening of the other exhaust duct decreases accordingly.

[0067] In addition, a detection device for detecting smoke parameters is also provided at the air outlet of the range hood 1. The detection device is specifically configured according to the detection data required during operation. In this embodiment, the detection device includes a second temperature sensor 6 and a smoke concentration sensor 7. The second temperature sensor 6 is used to detect the airflow temperature at the air outlet of the range hood 1, and the smoke concentration sensor 7 is used to detect the smoke concentration at the air outlet of the range hood 1. Depending on the different usage environments of the range hood, the medium detected by the smoke concentration sensor 7 can be air, water vapor, a mixture of oil fumes and water vapor, or oil fumes, etc.

[0068] The heat exchanger 5 in the air conditioning system is installed in the first exhaust duct 2. Specifically, the heat exchanger 5 can be set as a condenser to realize the cooling function of the air conditioning system. The condenser will generate heat during operation. In order to ensure the normal operation of the air conditioning system, the range hood fan 1 can be used as the outdoor air outlet of the air conditioning system to dissipate heat from the heat exchanger 5. Specifically, the airflow generated by the range hood fan 1 when it is working can dissipate heat from the heat exchanger 5 through the first exhaust duct 2 and then be discharged outdoors.

[0069] However, considering the operating environment of the range hood, when the user uses the air conditioning system's cooling function while cooking, the range hood fan 1 will draw water vapor and fumes from the cooking process into the first exhaust duct 2. If the temperature difference between the airflow entering the first exhaust duct 2 and the temperature on the heat exchanger 5 is not significant, a good heat dissipation effect cannot be achieved. Furthermore, it will increase the amount of grease adhering to the heat exchanger 5, affecting its heat exchange efficiency. Therefore, in this embodiment, a first temperature sensor 51 is provided on the heat exchanger 5 to detect the surface temperature of the heat exchanger 5.

[0070] The range hood fan 1, air valve 4, detection device, first temperature sensor 51, memory, second temperature sensor 6, and smoke concentration sensor 7 are all communicatively connected to the controller. The memory stores a program that implements the air valve 4 adjustment method of the air conditioner-type range hood as described below, and the controller can retrieve and execute the program in the memory.

[0071] Since an air conditioning system is installed, the range hood in this embodiment has two operating modes: an air conditioning operating mode and a non-air conditioning operating mode. The air conditioning operating mode includes a mode where only the air conditioning is on, and a combined mode where both the air conditioning and the range hood are on. The non-air conditioning operating mode is simply the mode where only the range hood is on.

[0072] In this embodiment, the range hood fan 1 can be set with multiple operating levels, each corresponding to different airflow and speed. For example, the range hood fan 1 can be set with four operating levels from low to high, allowing the user to adjust the operating level according to their needs. The operating level of the range hood fan 1 can also be adjusted manually or automatically using a stepless adjustment method. When the range hood is in the air conditioning-only mode, the speed of the range hood fan 1 can be controlled at V1, which is the minimum speed, meaning that no smoke extraction is required and only airflow is needed. When in the fume extraction-only mode, or in the combined working mode of air conditioning and fume extraction, the speed of the range hood is controlled at V2, where V2 > V1. V2 represents a speed different from V1, which can be any speed set by the user that is different from V1, or any speed that the range hood automatically adjusts according to the operating conditions.

[0073] In addition, the position of the damper 4 includes several different positions. When the damper 4 is in different positions, the opening degree of the first smoke exhaust channel 2 and the second smoke exhaust channel 3 will be different. For example Figure 2 As shown, in this embodiment, the positions of the damper 4 include positions A, B, C, D, and E. When the damper 4 is in position A, the opening degree of the first smoke exhaust channel 2 is KA1, and the opening degree of the second smoke exhaust channel 3 is KA2. When the damper 4 is in position B, the opening degree of the first smoke exhaust channel 2 is KB1, and the opening degree of the second smoke exhaust channel 3 is KB2. When the damper 4 is in position C, the opening degree of the first smoke exhaust channel 2 is KC1, and the opening degree of the second smoke exhaust channel 3 is KC. 2. When damper 4 is in position D, the opening degree of the first smoke exhaust channel 2 is KD1, and the opening degree of the second smoke exhaust channel 3 is KD2. When damper 4 is in position E, the opening degree of the first smoke exhaust channel 2 is KE1, and the opening degree of the second smoke exhaust channel 3 is KE2. Furthermore, KA1 < KA2, KB1 < KB2, KD1 > KD2, KE1 > KE2; KA1 < KB1 < KC1 < KD1 < KE1; KA2 > KB2 > KC2 > KD2 > KE2. Additionally, when damper 4 is in position A, damper 4 closes the first smoke exhaust channel 2, while the second smoke exhaust channel 3 is fully open. When damper 4 is in position E, damper 4 closes the second smoke exhaust channel 3, while the first smoke exhaust channel 2 is fully open. Of course, the number of positions of damper 4 can be specifically set as needed, and more positions of damper 4 can be set to facilitate more precise adjustment and control.

[0074] The method for adjusting the air valve 4 of the air-conditioning type range hood in this embodiment includes the following steps:

[0075] S1. Turn on the range hood and determine if the air conditioning mode is on. If yes, proceed to S2; otherwise, proceed to S3.

[0076] S2. Detect and obtain the temperature T of the heat exchanger 5, and detect and obtain the flue gas parameters at the air outlet of the fume extractor 1; adjust the position of the air valve 4 according to T and flue gas parameters to ensure that the opening of the first exhaust channel 2 and the second exhaust channel 3 is reasonable, so as to effectively cool down the heat exchanger 5 while minimizing the adhesion of oil stains on the heat exchanger 5.

[0077] S3. Control the air valve 4 to close the first exhaust duct 2, while the second exhaust duct 3 is fully open. That is, in the working mode where the air conditioning system does not need to be turned on, only the oil fume needs to be exhausted. The heat exchanger 5 does not work and therefore does not need to dissipate heat. At this time, the first exhaust duct 2, where the heat exchanger 5 is installed, can be closed to prevent the airflow from passing through the first exhaust duct 2 and contaminating the heat exchanger 5.

[0078] When the air conditioning is on, there are two operating modes.

[0079] If the air conditioning is only turned on, the flue gas parameter in S2 is the flue gas concentration; that is, in the air conditioning only turned on mode, the position of the air valve 4 can be adjusted by the flue gas concentration, thereby adjusting the airflow into the first exhaust channel 2 and the second exhaust channel 3.

[0080] If the system is in a combined working mode of turning on the air conditioner and turning on the fume extractor, the flue gas parameters in S2 include flue gas concentration and flue gas temperature. This means that the position of the air valve 4 can be adjusted by using specific flue gas concentration and flue gas temperature data to make the air valve 4 position appropriate.

[0081] like Figure 3 As shown, specifically, the operating method in the air conditioning-only mode includes the following steps:

[0082] SA1. Detect and obtain the temperature T of heat exchanger 5, and detect and obtain the smoke concentration n at the air outlet of the fume extractor 1.

[0083] Compare T with the first set temperature T1; in this embodiment, T1 = 65℃.

[0084] If T < T1, it means that the surface temperature of heat exchanger 5 is low, so SA2 is performed.

[0085] If T≥T1, it means that the surface temperature of heat exchanger 5 is high, then SA3 is performed;

[0086] SA2. Adjust the position of air valve 4 based on the flue gas concentration n and the working time h of the air conditioning system;

[0087] SA3, adjust the position of the air valve 4 based on the flue gas concentration n.

[0088] Specifically, when the surface temperature of heat exchanger 5 is low, step SA2 can be performed using the following specific method.

[0089] In step SA2, the real-time flue gas concentration n is compared with the first flue gas concentration threshold N1 and the second flue gas concentration threshold N2, where N1 < N2. In this embodiment, N1 = 0.4 mg / m³ 3 N2 = 1.6 mg / m³ 3 .

[0090] If n < N1, it means the user is not cooking, so the air conditioning system is not affected by cooking. In this case, the operating time h of the air conditioning system is compared with the operating time threshold H1. If h < H1, it is determined that the operating time of the air conditioning system is short, and it is believed that the user has just turned on the system and needs to cool down quickly. At this time, the cooling condition needs to be established quickly, and the heat dissipation of the heat exchanger 5 should be increased. The heat exchanger 5 has high heat exchange requirements, so the air valve 4 is controlled to move to position E, that is, the second exhaust duct 3 is closed, while the first exhaust duct 2 is fully open, so that the airflow driven by the range hood 1 passes through the first exhaust duct 2 to dissipate heat from the heat exchanger 5. If h≥H1, it indicates that the air conditioning system has been working for a relatively long time. It is generally assumed that the user is preparing food, washing pots and pans, etc., and the cooling condition has been established. That is, compared with the case of h

[0091] ​If N1≤n≤N2, it indicates that there is a certain amount of mist inside the range hood, suggesting that the user is engaged in cooking activities with relatively low smoke volume, such as stewing or simmering. In this case, the operating time h of the air conditioning system is compared with the operating time threshold H1. If h

[0092] If n > N2, it indicates that the smoke concentration at the exhaust vent of the range hood 1 is relatively high. It is then determined that the user is boiling water or steaming food. Considering that the temperature of the smoke and water vapor is relatively high, the heat exchange effect of the heat exchanger 5 is relatively poor. At the same time, to reduce the adhesion of dirt in the smoke and water vapor to the heat exchanger 5 and reduce the impact of the smoke and water vapor on the air conditioning system, the air valve 4 is controlled to move to position B, thereby further reducing the opening of the first exhaust duct 2, that is, controlling the opening of the second exhaust duct 3 to KB2, while the opening of the first exhaust duct 2 is KB1, KB1 < KC1, KB2 > KC2, and KB1 < KB2.

[0093] When the surface temperature of heat exchanger 5 is high, heat exchanger 5 urgently needs to dissipate heat. In this case, step SA3 can be carried out using the following specific method.

[0094] In step SA3, the real-time flue gas concentration n is compared with the second flue gas concentration threshold N2.

[0095] If n≤N2, it means that the concentration of pollutant in the airflow is relatively small. At this time, the degree of pollution to heat exchanger 5 is relatively small. It is sufficient to meet the heat dissipation requirements of heat exchanger 5. Therefore, control the air valve 4 to move to position E, that is, control the closing of the second exhaust channel 3, while the first exhaust channel 2 is fully open, so that all the airflow flows through the first exhaust channel 2 to achieve heat dissipation and cooling of heat exchanger 5.

[0096] ​If n > N2, that is, the flue gas concentration is relatively high, it is necessary to comprehensively consider the pollution of the flue gas to the heat exchanger 5 and the heat dissipation requirements of the heat exchanger 5. Therefore, the control valve 4 is moved to position C, thereby controlling the opening of the second flue gas passage 3 to KC2, and at the same time the opening of the first flue gas passage 2 to KC1, that is, adjusting the opening of the first flue gas passage 2 to a relatively central position.

[0097] like Figure 4 As shown, when the range hood is in a combined working mode of air conditioning and range hood operation, the heat exchanger 5 in the air conditioning system is significantly affected by the pollution from the inhaled fumes. Based on this condition, the corresponding operating method includes the following steps:

[0098] SB1. Detect and obtain the temperature T of heat exchanger 5, detect and obtain the smoke concentration n and smoke temperature s at the air outlet of range hood 1, and detect and obtain the fan speed v of range hood;

[0099] T is compared with the first set temperature T1 and the second set temperature T2. In this embodiment, T1 = 65℃ and T2 = 50℃.

[0100] If T > T1, it means that the surface temperature of heat exchanger 5 is high. To continue heat dissipation, it is necessary to increase the air flow rate of the first exhaust channel 2 as much as possible to enhance the heat dissipation effect on heat exchanger 5. Accordingly, SB2 is performed.

[0101] If T2≤T≤T1, it means that the surface temperature of heat exchanger 5 is normal, then SB3 is performed;

[0102] If T < T2, it means that the surface temperature of heat exchanger 5 is low, so SB4 is performed.

[0103] SB2. Adjust the position of air valve 4 based on the smoke concentration n and the range hood fan speed v;

[0104] SB3. Adjust the position of air valve 4 based on the flue gas concentration n, flue gas temperature s, and range hood fan speed v;

[0105] SB4. Adjust the position of the air valve 4 based on the flue gas concentration n, flue gas temperature s, and range hood fan speed v.

[0106] Specifically, when the surface temperature of heat exchanger 5 is high, the heat dissipation requirement of heat exchanger 5 is high, and step SB2 can be carried out using the following specific method.

[0107] In step SB2, the real-time flue gas concentration n is compared with the third flue gas concentration threshold N3. In this embodiment, N3 = 0.6 mg / m³. 3 .

[0108] If n < N3, it is determined that heat exchanger 5 urgently needs heat dissipation, and the smoke concentration in the range hood is relatively low, resulting in relatively low pollution of heat exchanger 5. In this case, the airflow of the first exhaust duct 2 should be increased as much as possible to enhance the heat dissipation effect on heat exchanger 5. The position of the air valve 4 is adjusted according to the range hood fan speed v. Since a higher fan speed indicates a potentially higher amount of smoke generated during cooking, the opening of the first exhaust duct 2 needs to be appropriately reduced to minimize pollution to heat exchanger 5. Therefore, when the opening of the first exhaust duct 2 is controlled to be greater than the first opening threshold, the larger v is, the smaller the opening of the first exhaust duct 2 should be. In this embodiment, the first opening threshold is KD1. Thus, based on the speed of the range hood fan 1, the opening of the first exhaust duct 2 is controlled to be either KD1 or KE1.

[0109] If n≥N3, it indicates that the flue gas concentration is high, and the corresponding pollution to heat exchanger 5 is also large. Therefore, it is necessary to comprehensively consider the heat dissipation and pollution of heat exchanger 5, control the air valve 4 to move to position C, and then control the opening of the second flue gas passage 3 to KC2, while the opening of the first flue gas passage 2 is KC1.

[0110] When the surface temperature of heat exchanger 5 is normal, it is necessary to comprehensively consider the heat dissipation requirements of heat exchanger 5 and the requirements to avoid contamination. Step SB3 can be carried out using the following specific methods.

[0111] In step SB3, the temperature difference value d = T - s is calculated, and d is compared with the set first temperature difference threshold D1. In this embodiment, D1 = 3℃.

[0112] If d≤D1, meaning the temperature of the airflow delivered by the exhaust fan 1 is close to the surface temperature of the heat exchanger 5 and the temperature difference is small, it is determined that the current flue gas cannot effectively dissipate heat from the heat exchanger 5. In the case that the heat exchanger 5 cannot effectively dissipate heat, while ensuring a small flow rate in the first exhaust channel 2, the pollution of the heat exchanger 5 by the flue gas should be minimized as much as possible. Therefore, the air valve 4 is controlled to move to position B, thereby controlling the opening of the second exhaust channel 3 to KB2, while the opening of the first exhaust channel 2 is KB1.

[0113] If d > D1, it indicates that the temperature difference between the flue gas temperature and the surface temperature of heat exchanger 5 is relatively large. Then, the influence factor p of the opening degree of damper 4 is calculated. The influence factor p of the opening degree of damper 4 is used to measure the comprehensive influence of flue gas temperature and flue gas concentration on the air conditioning system. The smaller the p value, the smaller the influence on the air conditioning system. At this time, it is possible to meet the heat dissipation of heat exchanger 5 as much as possible to ensure the normal operation of the air conditioning system. The larger the p value, the greater the influence on the air conditioning system. That is, it is not easy to meet the heat dissipation requirements of heat exchanger 5. At this time, it is necessary to take measures to avoid further impacts on the contamination of heat exchanger 5.

[0114] Specifically, p = k1*d + k2*n + k3*dn / dt, where k1, k2, and k3 represent different calculation coefficients. k1, k2, and k3 can be obtained based on experimental testing. In this embodiment, k1 = 1.2, k2 = 19.5, and k3 = 0.5. dn / dt represents the differential change of the flue gas concentration n with respect to time, thus indicating the trend of flue gas concentration change.

[0115] Compare p with the threshold p1 of the opening influence factor of the first air valve 4. If p < p1, the opening influence factor of the air valve 4 is small. At this time, d is relatively large and n is relatively small. Then, adjust the position of the air valve 4 according to the speed v of the range hood fan. Under the condition that the opening of the first exhaust channel 2 is greater than the second opening threshold, the larger v is, the smaller the opening of the first exhaust channel 2 is controlled. In this embodiment, the second opening threshold is KC1. Thus, based on the speed of the range hood fan 1, the opening of the first exhaust channel 2 is controlled to be KC1 or KD1.

[0116] If p≥p1, the opening factor of the damper 4 is relatively large. At this time, n is relatively large, so the damper 4 is controlled to move to position B, thereby controlling the opening of the second smoke exhaust channel 3 to KB2, while the opening of the first smoke exhaust channel 2 is KB1.

[0117] When the surface temperature of heat exchanger 5 is relatively low, the heat dissipation requirement is relatively weak, so the focus is more on avoiding contamination of heat exchanger 5. Step SB4 can be carried out using the following specific methods.

[0118] In step SB4, the temperature difference value d = T - s is calculated, and d is compared with the set second temperature difference threshold D2. In this embodiment, D2 = 5℃.

[0119] When d ≥ D2, the influence factor p of the opening degree of damper 4 is calculated as p = k1*d + k2*n + k3*dn / dt, where k1, k2, and k3 represent different calculation coefficients. k1, k2, and k3 can be obtained based on experimental tests. In this embodiment, k1 = 1.2, k2 = 19.5, and k3 = 0.5. dn / dt represents the differential change of flue gas concentration n with respect to time, thus indicating the trend of flue gas concentration change.

[0120] Compare p with the threshold p2 of the opening influence factor of the second air valve 4. If p < p2, it indicates that the air conditioning system is in good cooling condition based on the relatively small surface temperature of the heat exchanger 5. Then control the air valve 4 to move to position C, thereby controlling the opening of the second smoke exhaust channel 3 to KC2, while the opening of the first smoke exhaust channel 2 is KC1.

[0121] If p≥p2, and the surface temperature of heat exchanger 5 is relatively low, it indicates that the air conditioning system is in good cooling condition. Then, control the air valve 4 to move to position B, thereby controlling the opening of the second smoke exhaust channel 3 to KB2, while the opening of the first smoke exhaust channel 2 is KB1.

[0122] When d ≤ D2, the real-time flue gas concentration n is compared with the fourth flue gas concentration threshold N4. In this embodiment, N4 = 0.4 mg / m³. 3 .

[0123] If n < N4, it is determined that the air conditioning system is in good working condition and the smoke concentration is not high. Then, taking into account the heat dissipation and pollution of the heat exchanger 5, the position of the air valve 4 is adjusted according to the speed v of the range hood fan. Under the condition that the opening of the first smoke exhaust channel 2 is greater than the second opening threshold, the larger v is, the smaller the opening of the first smoke exhaust channel 2 is controlled. In this embodiment, the second opening threshold is KC1. Thus, based on the speed of the range hood fan 1, the opening of the first smoke exhaust channel 2 is controlled to be KC1 or KD1.

[0124] If n≥N4, it is determined that the current oil fume concentration is too high. Therefore, it is necessary to minimize the pollution of the heat exchanger 5 by the flue gas, control the air valve 4 to move to position B, and then control the opening of the second exhaust channel 3 to KB2, while the opening of the first exhaust channel 2 is KB1.

[0125] In response to the kitchen application environment, the air valve 4 adjustment method of this air-conditioning range hood can adjust the opening of the air valve 4 according to the smoke parameters when working in air-conditioning mode. This allows the opening of the air valve 4 to not only take into account the heat dissipation effect, but also to better improve the cleanliness of the heat exchanger 5 in the oily smoke environment, and minimize the pollution of the heat exchanger 5 caused by oily smoke that cannot bring high heat dissipation efficiency.

[0126] The range hood that uses the air valve 4 adjustment method of this air-conditioning range hood can ensure effective heat dissipation of the heat exchanger 5 when using an air conditioning system, while also reducing the pollution of the heat exchanger 5 by oil fumes and extending the cleaning cycle.

Claims

1. A method for adjusting the air valve of an air-conditioning type range hood, the air-conditioning type range hood comprising a housing, wherein a range hood fan (1) and an air conditioning system are installed inside the housing, and a smoke exhaust channel is provided inside the housing, the smoke exhaust channel comprising a first smoke exhaust channel (2) and a second smoke exhaust channel (3) connected to the air outlet of the range hood fan (1), wherein an air valve (4) for adjusting the opening of the first smoke exhaust channel (2) and the second smoke exhaust channel (3) is installed at the air outlet of the range hood fan (1), and a heat exchanger (5) in the air conditioning system is disposed in the first smoke exhaust channel (2), characterized in that: Includes the following steps: S1. Turn on the range hood and determine if the air conditioning mode is on. If yes, proceed to S2; otherwise, proceed to S3. S2. Detect and obtain the temperature T of the heat exchanger (5), and detect and obtain the flue gas parameters at the air outlet of the fume extractor (1); adjust the position of the air valve (4) according to T and the flue gas parameters; S3. Control the air valve (4) to close the first smoke exhaust passage (2), while the second smoke exhaust passage (3) is fully open. When the air conditioning is on, if it is in the air conditioning-only mode, the smoke parameter in S2 is the smoke concentration; if it is in the combined working mode of air conditioning and fume extraction, the smoke parameter in S2 includes smoke concentration and smoke temperature. When in the air conditioning-only mode, the speed of the range hood (1) is controlled to be V1; When the range hood is in either the oil fume extraction mode or the combined operation mode of the air conditioner and oil fume extraction, the speed of the range hood is controlled at V2, where V2 > V1.

2. The air valve adjustment method for an air-conditioning type range hood according to claim 1, characterized in that: The operating procedure in air conditioning-only mode includes the following steps: SA1. Detect and obtain the temperature T of the heat exchanger (5), and detect and obtain the smoke concentration n at the air outlet of the fume extractor (1); Compare T with the first set temperature T1; If T < T1, then proceed with SA2; If T≥T1, then perform SA3; SA2, Adjust the position of the air valve (4) based on the flue gas concentration n and the working time h of the air conditioning system; SA3, Adjust the position of the air valve (4) based on the flue gas concentration n; The positions of the damper (4) include positions A, B, C, D, and E; when the damper (4) is in position A, the opening degree of the first smoke exhaust channel (2) is KA1, and the opening degree of the second smoke exhaust channel (3) is KA2; when the damper (4) is in position B, the opening degree of the first smoke exhaust channel (2) is KB1, and the opening degree of the second smoke exhaust channel (3) is KB2; when the damper (4) is in position C, the opening degree of the first smoke exhaust channel (2) is KC1, and the opening degree of the second smoke exhaust channel (3) is KC2. When the damper (4) is in position D, the opening degree of the first smoke exhaust channel (2) is KD1 and the opening degree of the second smoke exhaust channel (3) is KD2; when the damper (4) is in position E, the opening degree of the first smoke exhaust channel (2) is KE1 and the opening degree of the second smoke exhaust channel (3) is KE2; and KA1 < KA2, KB1 < KB2, KD1 > KD2, KE1 > KE2; KA1 < KB1 < KC1 < KD1 < KE1; KA2 > KB2 > KC2 > KD2 > KE2.

3. The air valve adjustment method for an air-conditioning type range hood according to claim 2, characterized in that: In step SA2, the real-time flue gas concentration n is compared with the first flue gas concentration threshold N1 and the second flue gas concentration threshold N2, where N1 < N2; If n < N1, the working time h of the air conditioning system is compared with the working time threshold H1. If h < H1, the control valve (4) is moved to position E, thereby closing the second smoke exhaust channel (3), while the first smoke exhaust channel (2) is fully open. If h ≥ H1, the control valve (4) is moved to position D, thereby controlling the opening degree of the second smoke exhaust channel (3) to KD2, while the opening degree of the first smoke exhaust channel (2) is KD1, KD1 > KD2. If N1≤n≤N2, the working time h of the air conditioning system is compared with the working time threshold H1. If h<H1, the air valve (4) is controlled to move to position D, thereby controlling the opening degree of the second smoke exhaust channel (3) to KD2, and the opening degree of the first smoke exhaust channel (2) to KD1. If h≥H1, the air valve (4) is controlled to move to position C, thereby controlling the opening degree of the second smoke exhaust channel (3) to KC2, and the opening degree of the first smoke exhaust channel (2) to KC1. If n > N2, control the air valve (4) to move to position B, thereby controlling the opening degree of the second smoke exhaust channel (3) to KB2, while the opening degree of the first smoke exhaust channel (2) is KB1, KB1 < KC1, KB2 > KC2, and KB1 < KB2.

4. The air valve adjustment method for an air-conditioning type range hood according to claim 2, characterized in that: In step SA3, the real-time flue gas concentration n is compared with the second flue gas concentration threshold N2; If n≤N2, the control valve (4) moves to position E, thereby closing the second smoke exhaust channel (3), while the first smoke exhaust channel (2) is fully open; If n > N2, control the air valve (4) to position C, thereby controlling the opening degree of the second smoke exhaust channel (3) to KC2, while the opening degree of the first smoke exhaust channel (2) is KC1.

5. The air valve adjustment method for an air-conditioning type range hood according to claim 1, characterized in that: The working method for operating in a combined mode of turning on the air conditioner and the range hood includes the following steps: SB1. Detect and obtain the temperature T of the heat exchanger (5), detect and obtain the smoke concentration n and smoke temperature s at the air outlet of the range hood (1), and detect and obtain the fan speed v of the range hood; Compare T with the first set temperature T1 and the second set temperature T2; If T > T1, then perform SB2; If T2≤T≤T1, then perform SB3; If T < T2, then perform SB4; SB2. Adjust the position of the air valve (4) based on the smoke concentration n and the fan speed v of the range hood; SB3. Adjust the position of the air valve (4) based on the flue gas concentration n, flue gas temperature s and range hood fan speed v; SB4. Adjust the position of the air valve (4) based on the flue gas concentration n, flue gas temperature s and range hood fan speed v; The positions of the damper (4) include positions A, B, C, D, and E; when the damper (4) is in position A, the opening degree of the first smoke exhaust channel (2) is KA1, and the opening degree of the second smoke exhaust channel (3) is KA2; when the damper (4) is in position B, the opening degree of the first smoke exhaust channel (2) is KB1, and the opening degree of the second smoke exhaust channel (3) is KB2; when the damper (4) is in position C, the opening degree of the first smoke exhaust channel (2) is KC1, and the opening degree of the second smoke exhaust channel (3) is KC2. When the damper (4) is in position D, the opening degree of the first smoke exhaust channel (2) is KD1 and the opening degree of the second smoke exhaust channel (3) is KD2; when the damper (4) is in position E, the opening degree of the first smoke exhaust channel (2) is KE1 and the opening degree of the second smoke exhaust channel (3) is KE2; and KA1 < KA2, KB1 < KB2, KD1 > KD2, KE1 > KE2; KA1 < KB1 < KC1 < KD1 < KE1; KA2 > KB2 > KC2 > KD2 > KE2.

6. The air valve adjustment method for an air-conditioning type range hood according to claim 5, characterized in that: In step SB2, the real-time flue gas concentration n is compared with the third flue gas concentration threshold N3; If n < N3, it is determined that the heat exchanger (5) needs heat dissipation. Then, the position of the air valve (4) is adjusted according to the fan speed v of the range hood. When the opening degree of the first exhaust channel (2) is greater than the first opening degree threshold, the larger v is, the smaller the opening degree of the first exhaust channel (2) is controlled. If n≥N3, control the air valve (4) to position C, thereby controlling the opening degree of the second smoke exhaust channel (3) to KC2, while the opening degree of the first smoke exhaust channel (2) is KC1.

7. The air valve adjustment method for an air-conditioning type range hood according to claim 5, characterized in that: In step SB3, the temperature difference value d = T - s is calculated, and d is compared with the set first temperature difference threshold D1. If d≤D1, it is determined that the current flue gas cannot effectively achieve heat dissipation of the heat exchanger (5), and the air valve (4) is controlled to move to position B, thereby controlling the opening degree of the second flue gas passage (3) to KB2, while the opening degree of the first flue gas passage (2) is KB1; If d > D1, then calculate the influence factor p of the opening of the air valve (4), p = k1*d + k2*n + k3*(dn / dt), where k1, k2, and k3 represent different calculation coefficients, and dn / dt represents the change in flue gas concentration n relative to time. Compare p with the threshold p1 of the opening influence factor of the first air valve (4). If p < p1, adjust the position of the air valve (4) according to the fan speed v of the range hood. Under the condition that the opening of the first exhaust channel (2) is greater than the second opening threshold, the larger v is, the smaller the opening of the first exhaust channel (2) will be. If p≥p1, then control the air valve (4) to move to position B, thereby controlling the opening degree of the second smoke exhaust channel (3) to KB2, while the opening degree of the first smoke exhaust channel (2) is KB1.

8. The air valve adjustment method for an air-conditioning type range hood according to claim 5, characterized in that: In step SB4, the temperature difference value d = T - s is calculated, and d is compared with the set second temperature difference threshold D2. When d≥D2, calculate the influence factor p of the opening of the air valve (4), p=k1*d+k2*n+k3*(dn / dt), k1, k2, k3 represent different calculation coefficients, and dn / dt represents the change of flue gas concentration n relative to time; Compare p with the threshold p2 of the opening influence factor of the second air valve (4). If p < p2, control the air valve (4) to move to position C, thereby controlling the opening of the second smoke exhaust channel (3) to KC2, while the opening of the first smoke exhaust channel (2) is KC1. If p≥p2, then control the air valve (4) to move to position B, thereby controlling the opening of the second smoke exhaust channel (3) to KB2, while the opening of the first smoke exhaust channel (2) is KB1; If d≤D2, the real-time flue gas concentration n is compared with the fourth flue gas concentration threshold N4. If n < N4, the air conditioning system is judged to be in good working condition. Then, the position of the air valve (4) is adjusted according to the fan speed v of the range hood. When the opening degree of the first exhaust channel (2) is greater than the second opening degree threshold, the larger v is, the smaller the opening degree of the first exhaust channel (2) is controlled. If n≥N4, it is determined that the current oil fume concentration is too high. The air valve (4) is controlled to move to position B, thereby controlling the opening degree of the second exhaust channel (3) to KB2, while the opening degree of the first exhaust channel (2) is KB1.

9. A range hood, comprising a housing, a controller, and a memory, wherein a range hood fan (1) and an air conditioning system are installed inside the housing, and a smoke exhaust channel is provided inside the housing, the smoke exhaust channel comprising a first smoke exhaust channel (2) and a second smoke exhaust channel (3) connected to the air outlet of the range hood fan (1), a damper (4) for adjusting the opening of the first smoke exhaust channel (2) and the second smoke exhaust channel (3) is installed at the air outlet of the range hood fan (1), and a detection device for detecting smoke parameters is also provided at the air outlet of the range hood fan (1); a heat exchanger (5) in the air conditioning system is disposed in the first smoke exhaust channel (2), and a first temperature sensor (51) is provided on the heat exchanger (5); The range hood (1), air valve (4), detection device, first temperature sensor (51), and memory are respectively connected to the controller. The memory stores a program that implements the air valve adjustment method of the air-conditioning range hood as described in any one of claims 1 to 8. The controller can retrieve and execute the program in the memory.

10. The range hood according to claim 9, characterized in that: The detection device includes a second temperature sensor (6) and a flue gas concentration sensor (7), which are respectively connected to the controller.

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