Air-conditioning type range hood and drainage control method thereof

Abstract

An air-conditioning range hood and a drainage control method thereof, comprising a housing and an air-conditioning component, wherein a mutually isolated smoke exhaust channel and an air outlet channel are arranged in the housing, a condenser is arranged in the smoke exhaust channel, an evaporator is arranged in the air outlet channel, a drainage device in the housing comprises a water tank, a water pump, a control valve, a water level sensor, a drainage pipe and an atomizer, the water tank collects condensed water, and the drainage volume can be adjusted by adjusting the opening of the control valve and the speed of the water pump, the water inlet end of the drainage pipe is connected to the water outlet of the water pump, the atomizer is installed in the smoke exhaust channel and connected to the water outlet end of the drainage pipe, and the water pump, the control valve and the atomizing motor are controlled accordingly by reading the output signal of the water level sensor. The condensed water generated by the air-conditioning range hood when working can be discharged out of the smoke exhaust channel through the atomizer, and the drainage control method is suitable for a complex kitchen environment, and can accurately and flexibly control the drainage volume even when there are many impurities in the condensed water, and remind the user to maintain and clean to prevent the water pipe or water pump from being blocked.

Description

Technical Field

[0001] The invention relates to an air-conditioning type range hood, in particular to an air-conditioning type range hood and a drainage control method thereof. Background Art

[0002] In order to cool the kitchen air in summer and provide warm air to the kitchen in winter, people have invented various kitchen air conditioners. Currently, there are products such as air conditioner hoods on the market, which add air conditioning components to the range hood platform. They can realize all the functions of range hoods and air conditioners at the same time. However, these air conditioner hoods often simply merge the indoor unit of traditional air conditioners with traditional range hoods, and the outdoor unit of the air conditioner still needs to be installed separately outdoors. This type of air conditioner hood is not integrated enough and the installation is relatively cumbersome. In addition, during the use of the air-conditioning hood, the evaporator of the air-conditioning will produce condensed water, some of which are directly discharged outdoors through the drain pipe, and some use water pumps and atomizing motors to atomize the condensed water and discharge it through the flue outlet. However, the current drainage method is more commonly used and common, but it cannot be directly applied to the air-conditioning hood. The difference between air-conditioning condensed water and air-conditioning hood condensed water is that the kitchen environment is complex. With the increase of use time, the impurities in the water will increase, which will affect the work of the water pump and cause the water pipe to be blocked. The pressure of the same water level detected by the differential pressure method is also different from that of pure water. The pressure of water with the same medium at different water levels is also different. The water pressure P = ρg h. When the same liquid medium is the same and at the same latitude, the pressure is proportional to the liquid level height. At the same height, the liquid pressure is proportional to ρg. It can be seen from this that the condensed water of the air-conditioning hood has more impurities and requires high drainage devices and methods. The current water level detection and drainage devices cannot accurately control the drainage, nor can they remind users to maintain and clean, and cannot be directly applied to air-conditioning hoods. In addition, the problem of inaccurate drainage control caused by increased impurities in condensed water in the current drainage control method has not been effectively solved. Summary of the invention

[0003] The first technical problem to be solved by the present invention is to provide an air-conditioning range hood that can discharge air-conditioning condensed water to the outside of the flue through an atomizer and can control the amount of condensed water discharged, in response to the above-mentioned existing technical status.

[0004] The second technical problem to be solved by the present invention is to provide a drainage control method for an air-conditioning type range hood that can be applied to complex kitchen environments and flexibly control the amount of condensed water discharged, in response to the above-mentioned existing technical status.

[0005] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is as follows: the air-conditioning type range hood comprises a casing and an air-conditioning component, wherein the casing is provided with a smoke exhaust passage and an air outlet passage which are isolated from each other, wherein the air-conditioning component comprises a compressor, a condenser and an evaporator, wherein the compressor, the condenser and the evaporator are connected through a refrigerant pipeline, wherein the condenser is arranged in the smoke exhaust passage, and the evaporator is arranged in the air outlet passage, wherein the feature is that a drainage device is installed in the casing, wherein the drainage device comprises a water tank, a water pump, a control valve, a water level sensor, a drainage pipe and an atomizer, the water tank is used to collect condensed water condensed on the evaporator, the water pump is installed inside the water tank, the drainage volume can be adjusted by adjusting the opening of the control valve and the speed of the water pump, the water level sensor is used to sense the water level in the water tank, the water inlet end of the drain pipe is connected to the water outlet of the water pump, the atomizer has an atomizing motor, the atomizer is installed in the smoke exhaust channel, the water inlet end of the atomizer is connected to the water outlet end of the drain pipe, and also includes a controller for correspondingly controlling the water pump, the control valve and the atomizing motor by reading the output signal of the water level sensor.

[0006] Preferably, the control valve is installed at the water outlet of the water pump or inside the water pump.

[0007] Further preferably, along the flow direction of the oil smoke, the atomizer is arranged downstream of the condenser and close to the air outlet of the smoke exhaust channel. In this way, after the condensed water is atomized by the atomizer, it is discharged from the smoke exhaust channel driven by the flue gas flow.

[0008] Further preferably, the condenser and the evaporator are both arranged to be inclined relative to the vertical plane.

[0009] More preferably, the smoke exhaust channel includes a first smoke exhaust channel and a second smoke exhaust channel which are independent of each other, and the condenser is arranged in the first smoke exhaust channel. In this way, the range hood forms a dual-channel smoke exhaust structure, and different smoke exhaust channels can be selected for smoke exhaust in different working modes.

[0010] In order to make the internal structure layout of the casing more reasonable, a fume suction fan is installed in the casing. Along the flow direction of the fume, the smoke exhaust channel is arranged downstream of the air outlet of the fume suction fan. The smoke exhaust channel and the air outlet channel are both arranged above the fume suction fan, and the smoke exhaust channel and the air outlet channel are arranged adjacent to each other on the left and right.

[0011] The compressor can be in a plurality of different positions. Preferably, the compressor is installed inside the casing, and the compressor is located outside the smoke exhaust passage and the air outlet passage.

[0012] The technical solution adopted by the present invention to solve the second technical problem is: the drainage control method of the air-conditioning type range hood is characterized by comprising the following steps:

[0013] 1) Start;

[0014] 2) Test before leaving the factory and store the transmission value A min1 , A min2 , A min3 , P min1 , P min2 , D min1 , D min2 ;

[0015] 3) The controller reads A min1 , A min2 , A min3 , P min1 , P min2 , D min1 , D min2 ;

[0016] 4) Determine whether there are other stored values ​​in the storage medium;

[0017] If not, go to step 5);

[0018] If yes, go to step 6);

[0019] 5) 5.1. Obtain the transmission value A;

[0020] 5.2. Turn on the atomizing motor;

[0021] 5.3. Calculate the duty cycle P of PWM;

[0022] 5.4. Output PWM to control the speed of the water pump;

[0023] 5.5. Calculate the control valve opening D;

[0024] 5.6. Opening degree of control valve D;

[0025] 5.7. Detect the current I of the atomizing motor;

[0026] 5.8. Determine whether the current I is equal to the current of the atomizer motor when it is idling;

[0027] If so, record the transmission value A at this time as A max2 , and then proceed to step 5.9;

[0028] If not, proceed to step 7);

[0029] 5.9. A max2 storing in a storage medium;

[0030] 5.10. Turn off the atomizing motor;

[0031] 5.11. Turn off the water pump and proceed to step 7);

[0032] 6) 6.1. Start timing;

[0033] 6.2. Read A1(n-1);

[0034] 6.3. Obtain the transmission value A;

[0035] 6.4. Calculate the ratio n = A1(n-1) / A1;

[0036] 6.5. Turn on the atomizing motor;

[0037] 6.6. Calculate the duty cycle P of PWM;

[0038] 6.7. Output PWM to control the speed of the water pump;

[0039] 6.8. Calculate the control valve opening D;

[0040] 6.9, control valve opening degree D;

[0041] 6.10. Detect the current I of the atomizing motor;

[0042] 6.11. Determine whether the current I is equal to the current of the atomizer motor when it is idling;

[0043] If so, record the transmission value A at this time as A maxn , and then proceed to step 6.12;

[0044] If not, proceed to step 7);

[0045] 6.12. Whether the setting time has arrived;

[0046] If so, A maxn Store it in the storage medium and max(n-1) Erase, and then proceed to step 6.13;

[0047] If not, proceed to step 6.14;

[0048] 6.13. Timer reset;

[0049] 6.14. Turn off the water pump and atomizing motor, and then proceed to step 7);

[0050] 7) End and return to step 1).

[0051] More preferably, the step 2) comprises the following steps:

[0052] 2.1. Start;

[0053] 2.2. Pour water into the water tank;

[0054] 2.3. Water level reaches h min ;

[0055] 2.4. Read the transmission value A at this time, recorded as A min1 ;

[0056] 2.5. Adjust the appropriate water pump speed and control valve opening;

[0057] 2.6. Record the duty cycle P at this time min1 and control valve opening D min1 ;

[0058] 2.7. A min1 , P min1 , D min1 storing in a storage medium;

[0059] 2.8. Water level reaches h max ;

[0060] 2.9. Read the transmission value A at this time, record it as A max1 ;

[0061] 2.10. Adjust the appropriate water pump speed and control valve opening;

[0062] 2.11. Record the duty cycle P at this time max1 and control valve opening D max1 ;

[0063] 2.12. A max1 , P max1 and D max1 storing in a storage medium;

[0064] 2.13. Pour out the water in the water tank;

[0065] 2.14. End.

[0066] Further preferably, the step 5.3 and the step 6.6 calculate the duty cycle P of PWM according to the following formula:

[0067]

[0068] Further preferably, the control valve opening D is calculated according to the following formula in step 5.5 and step 6.8:

[0069]

[0070] Compared with the prior art, the advantages of the present invention are that the condensed water generated when the air-conditioning type range hood is working can be discharged out of the smoke exhaust channel through the atomizer, so that the condensed water can be discharged smoothly, and the controller can control the water pump, the control valve and the atomizing motor of the atomizer according to the amount of condensed water, thereby controlling the drainage amount of the condensed water. In addition, the drainage control method of the range hood is suitable for complex kitchen environments, and can accurately and flexibly control the discharge amount of the condensed water even when there are many impurities in the condensed water, and can remind users to maintain and clean, and prevent blockage of water pipes or water pumps. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] Figure 1 This is a schematic structural diagram of a range hood according to Embodiment 1 of the present invention;

[0072] Figure 2 This is a schematic diagram of the structure of a drainage device according to Embodiment 1 of the present invention;

[0073] Figure 3 This is a schematic diagram of the working principle of the air conditioning assembly according to the first embodiment of the present invention;

[0074] Figure 4 This is a flow chart of a drainage control method according to Embodiment 1 of the present invention;

[0075] Figure 5 This is a flow chart of storing transmission values ​​according to the first embodiment of the present invention;

[0076] Figure 6 It is a schematic structural diagram of a range hood according to the second embodiment of the present invention. DETAILED DESCRIPTION

[0077] The present invention is further described in detail below with reference to the accompanying drawings.

[0078] Embodiment 1:

[0079] like Figures 1 to 3 As shown, the air-conditioning range hood of this embodiment includes a housing 20 and an air-conditioning assembly, wherein the air-conditioning assembly includes a compressor 11, a condenser 12 and an evaporator 13, the compressor 11, the condenser 12 and the evaporator 13 are connected through a refrigerant pipeline 14, and a throttling device 15 is installed on the refrigerant pipeline 14 between the condenser 12 and the evaporator 13. A refrigerant flows through the refrigerant pipeline 14, and common refrigerants can be water, ethylene glycol or propylene glycol, etc. The specific working principle of the air-conditioning assembly is the same as that of the existing air conditioner, and will not be described in detail here.

[0080] A fume extractor fan 23 is installed at the lower part of the housing 20, and a fume exhaust passage 21 and an air outlet passage 22 are provided at the upper part of the housing 20. Along the flow direction of the fume, the fume exhaust passage 21 is provided downstream of the air outlet of the fume extractor fan 23. Figure 1The direction indicated by the middle arrow A is right, and the air outlet channel 22 is located on the left side of the smoke exhaust channel 21 .

[0081] The housing 20 is provided with an air inlet and an air outlet of the air outlet passage 22. The air inlet can be connected to the kitchen or to the outside. The air outlet can be arranged on the front of the housing 20 or on the top of the housing 20. When the air outlet is arranged on the front of the housing 20, the air conditioning air blows directly from the air outlet to the kitchen. When the air outlet is arranged on the top of the housing 20, the air outlet is connected to the kitchen through an air duct (not shown in the figure). The evaporator 13 and the internal fan 24 are installed in the air outlet passage 22. The evaporator 13 is arranged to be inclined relative to the vertical plane. The internal fan 24 is the air outlet fan. Along the gas flow direction, the internal fan 24 is located downstream of the evaporator 13.

[0082] In this embodiment, the compressor 11 is installed inside the casing 20 , and the compressor 11 is located outside the smoke exhaust passage 21 and the air outlet passage 2 . Specifically, the compressor 11 is located on the left side of the range fumes suction fan 23 and below the air outlet passage 22 .

[0083] The smoke exhaust channel 21 of this embodiment includes a first smoke exhaust channel 211 and a second smoke exhaust channel 212. A duct switching valve (not shown in the figure) is installed at the entrance of the first smoke exhaust channel 211 and the second smoke exhaust channel 212 to switch one of the first smoke exhaust channel 211 and the second smoke exhaust channel 212 to be connected to the air outlet of the fume exhaust fan 23. The condenser 12 is installed in the first smoke exhaust channel 211, and the condenser 12 is inclined relative to the vertical plane. In addition, in order to prevent the fume from contaminating the condenser 12, an oil fume purification device (not shown in the figure) is also installed in the first smoke exhaust channel 211, and the oil fume purification device is located upstream of the condenser 12.

[0084] A drainage device 3 is installed in the housing 20, and the drainage device 3 includes a water tank 31, a water pump 32, a control valve 33, a water level sensor 34, a drainage pipe 35 and an atomizer 36. The water tank 31 is used to collect condensed water condensed on the evaporator 13, the water pump 32 is installed inside the water tank 31, the control valve 33 is installed inside the water pump 32, the water level sensor 34 is installed on the water tank 1 to sense the water level of the water tank 31, the water inlet end of the drainage pipe 35 is connected to the water outlet of the water pump 32, the atomizer 36 is installed in the smoke exhaust channel 21, the atomizer 36 has an atomizing motor, and the water inlet end of the atomizer 36 is connected to the water outlet end of the drainage pipe 35. The controller (not shown) reads the output signal of the water level sensor 34 and controls the water pump 32, the control valve 33 and the atomizing motor accordingly, that is, controls the speed of the water pump 32, controls the opening of the control valve 33, and controls the opening and closing of the atomizing motor. The speed of the water pump 32 is different, the opening of the control valve 33 is different, and the drainage volume is also different.

[0085] The working principle of the air-conditioning range hood is as follows:

[0086] The range hood and the air conditioner are both turned on. In the cooling mode, the oil smoke is discharged to the outside through the first smoke exhaust channel 211. In addition, the oil smoke airflow sweeping over the surface of the condenser 12 can cool and dissipate the heat of the condenser 12, thereby reducing the temperature of the refrigerant flowing through the condenser 12, thereby improving the heat exchange effect of the condenser 12 and further improving the energy efficiency of the air conditioner. At the same time, under the action of the indoor fan 24, cold air is sent into the kitchen from the air outlet. The condensed water generated by the evaporator 13 flows into the atomizer 36 through the drain pipe 35, and forms water vapor after being atomized by the atomizer 36, and then is discharged to the outside through the first smoke exhaust channel 211 driven by the oil smoke airflow.

[0087] Only the range hood is turned on, and the oil smoke is discharged to the outside through the second smoke exhaust channel 212.

[0088] In addition, the oil fume extraction component of the present invention is not limited to the structure of installing the oil fume extraction fan inside the casing. The oil fume extraction component can also adopt a non-powered structure, that is, the oil fume extraction component only retains the smoke collecting shell, and the oil fume extraction fan is placed outside the casing. For example, the oil fume extraction fan can be installed on the top of the public flue of the building.

[0089] The present invention adopts the following control method to achieve the purpose of accurately and flexibly controlling the condensate discharge volume even if the impurities in the water increase, and reminding the user to clean.

[0090] like Figure 4 As shown, the drainage control method of the air-conditioning type range hood of this embodiment includes the following steps:

[0091] 1) Start;

[0092] 2) Test before leaving the factory and store the transmission value A min1 , A min2 , A min3 , P min1 , P min2 , D min1 , D min2 ;

[0093] 3) The controller reads A min1 , A min2 , A min3 , P min1 , P min2 , D min1 , D min2 ;

[0094] 4) Determine whether there are other stored values ​​in the storage medium;

[0095] If not, go to step 5);

[0096] If yes, go to step 6);

[0097] 5) 5.1. Obtain the transmission value A;

[0098] 5.2. Turn on the atomizing motor;

[0099] 5.3. Calculate the duty cycle P of PWM;

[0100] 5.4. Output PWM to control the speed of the water pump;

[0101] 5.5. Calculate the control valve opening D;

[0102] 5.6. Opening degree of control valve D;

[0103] 5.7. Detect the current I of the atomizing motor;

[0104] 5.8. Determine whether the current I is equal to the current of the atomizer motor when it is idling;

[0105] If so, record the transmission value A at this time as A max2 , and then proceed to step 5.9;

[0106] If not, proceed to step 7);

[0107] 5.9. A max2 storing in a storage medium;

[0108] 5.10. Turn off the atomizing motor;

[0109] 5.11. Turn off the water pump and proceed to step 7);

[0110] 6) 6.1. Start timing;

[0111] 6.2. Read A1(n-1);

[0112] 6.3. Obtain the transmission value A;

[0113] 6.4. Calculate the ratio n = A1(n-1) / A1;

[0114] 6.5. Turn on the atomizing motor;

[0115] 6.6. Calculate the duty cycle P of PWM;

[0116] 6.7. Output PWM to control the speed of the water pump;

[0117] 6.8. Calculate the control valve opening D;

[0118] 6.9, control valve opening degree D;

[0119] 6.10. Detect the current I of the atomizing motor;

[0120] 6.11. Determine whether the current I is equal to the current of the atomizer motor when it is idling;

[0121] If so, record the transmission value A at this time as A maxn , and then proceed to step 6.12;

[0122] If not, proceed to step 7);

[0123] 6.12. Whether the setting time has arrived;

[0124] If so, A maxn Store it in the storage medium and max(n-1) Erase, and then proceed to step 6.13;

[0125] If not, proceed to step 6.14;

[0126] 6.13. Timer reset;

[0127] 6.14. Turn off the water pump and atomizing motor, and then proceed to step 7);

[0128] 7) End and return to step 1).

[0129] Among them, in step 6.12, the set time can be set to 1 hour to 2 hours.

[0130] like Figure 5 As shown, step 2) comprises the following steps:

[0131] 2.1. Start;

[0132] 2.2. Pour water into the water tank;

[0133] 2.3. Water level reaches h min ;

[0134] 2.4. Read the transmission value A at this time, recorded as A min1 ;

[0135] 2.5. Adjust the appropriate water pump speed and control valve opening;

[0136] 2.6. Record the duty cycle P at this time min1 and control valve opening D min1 ;

[0137] 2.7. A min1 , P min1 , D min1 storing in a storage medium;

[0138] 2.8. Water level reaches h max ;

[0139] 2.9. Read the transmission value A at this time, record it as A max1 ;

[0140] 2.10. Adjust the appropriate water pump speed and control valve opening;

[0141] 2.11. Record the duty cycle P at this time max1 and control valve opening D max1 ;

[0142] 2.12. A max1 , P max1 and D max1 storing in a storage medium;

[0143] 2.13. Pour out the water in the water tank;

[0144] 2.14. End.

[0145] In step 2.13, after the water in the water tank 31 is poured out, it is best to wipe the water tank 31 dry.

[0146] Step 5.3 and step 6.6 calculate the PWM duty cycle P according to the following formula:

[0147]

[0148] Step 5.5 and step 6.8 calculate the control valve opening D according to the following formula:

[0149]

[0150] The above control method is described in detail as follows:

[0151] The water level sensor 34 detects the water pressure in the water tank 31 using the differential pressure method. When the water level in the water tank reaches the highest level h max When the water level sensor 34 detects an electrical signal, the signal is transmitted to the controller, i.e., the main control MCU, which turns on the atomizing motor of the atomizer 36 and adjusts the opening of the control valve 33. max1 , adjust the pump speed V max1 , the corresponding output PWM duty cycle is P max1 , and detect the atomizing motor current at the same time. When the water in the water tank 31 is pumped to the lowest position h min When the water level is just below the water inlet of the water pump 32, the water pump 32 and the atomizing motor are idling, and the atomizing motor idling current I1 is detected. At this time, the water level is h min The water level sensor 34 detects the electrical signal and transmits the signal to the main control MCU, which turns on the atomizing motor and adjusts the control valve opening D min1 , adjust the pump speed V min1 , the corresponding duty cycle is P min1The transmission value A of the water level sensor is detected in real time, and the PWM duty cycle P for controlling the speed of the water pump 32 is adjusted according to the following formula:

[0152]

[0153] And adjust the control valve opening D according to the following formula:

[0154]

[0155] Record the first use of water level h max ,h min The corresponding transmission value A max1 , A min1 , stored in the storage medium, which can be the Eeprom built into the master MCU, or an external Eeprom or other available storage medium.

[0156] When in use, the electrical signal detected by the water level sensor 34 when the atomizing motor is idling is recorded every set time, such as every hour, and transmitted to the main control MCU, and recorded as A minn Store it in a storage medium and compare it with A max1 Make a ratio and record the ratio as n, that is, n = A minn / A min1 , when the water level reaches the highest level A maxn =A max1 ×n. The main control MCU will turn on the atomizing motor, adjust the PWM duty cycle P of the water pump 32 to adjust the speed of the water pump 32, and detect the transmission value A of the water level sensor 34 in real time. At this time, the PWM duty cycle P is calculated according to the following formula:

[0157]

[0158] And adjust the control valve opening D according to the following formula:

[0159]

[0160] When the numerical value recording is completed and the atomizing motor is idling, the water pump 32 and the atomizing motor are turned off.

[0161] Before leaving the factory, a test of severe working conditions can be carried out. When the impurities in the water reach a certain level, that is, the impurities are so much that the water pipes or the water pump 32 are blocked, the user is reminded to perform maintenance and clean the water pipes and the water tank 31. The n at this time is recorded as K and stored in the storage medium.

[0162] When the user uses it, the size of n and K is compared at set intervals, such as every hour. When n=K, the user is reminded to perform maintenance, which can be done by interface display or sound prompt. K is a constant, and the specific value can be determined according to the test results.

[0163] The transmission mode of the voltage signal detected by the water level sensor 34 to the main control MCU can be wired transmission or wireless transmission. In the wired transmission mode, it is only necessary to connect the voltage signal output by the water level sensor 34 to the corresponding detection port of the main control MCU, such as the AD acquisition port, or the receiving module port, such as the IIC receiving port. In the wireless transmission mode, a wireless transmission module and its control module, such as a WIFI module, an RF module, etc., can be added to the water level sensor 34.

[0164] Embodiment 2:

[0165] like Figure 6 As shown, the control valve 33 is installed at the water outlet of the water pump 32, and its working principle is the same as that of the first embodiment, which will not be described in detail here.

Claims

1. A drainage control method for an air-conditioning type range hood, the air-conditioning type range hood comprising a housing (20) and an air-conditioning component, the housing being provided with a smoke exhaust passage (21) and an air outlet passage (22) which are isolated from each other, the air-conditioning component comprising a compressor (11), a condenser (12) and an evaporator (13), the compressor (11), the condenser (12) and the evaporator (13) being connected to each other via a refrigerant pipeline (14), the condenser (12) being provided in the smoke exhaust passage (21), and the evaporator (13) being provided in the air outlet passage (22), characterized in that: A drainage device (3) is installed in the housing (20), and the drainage device (3) comprises a water tank (31), a water pump (32), a control valve (33), a water level sensor (34), a drainage pipe (35) and an atomizer (36). The water tank (31) is used to collect condensed water condensed on the evaporator (13). The water pump (32) is installed inside the water tank (31). The drainage volume can be adjusted by adjusting the opening of the control valve (33) and the rotation speed of the water pump (32). The water level sensor (34) is used to adjust the drainage volume. The water level in the water tank (31) is sensed, the water inlet end of the drain pipe (35) is connected to the water outlet of the water pump (32), the atomizer (36) has an atomizing motor, the atomizer (36) is installed in the smoke exhaust channel (21), the water inlet end of the atomizer (36) is connected to the water outlet end of the drain pipe (35), and a controller is also included for correspondingly controlling the water pump (32), the control valve (33) and the atomizing motor by reading the output signal of the water level sensor (34); the control method comprises the following steps: 1) Start; 2) Test before leaving the factory and store the transmission value A min1 , A min2 , A min3 , P min1 , P min2 , D min1 , D min2 ; 3) The controller reads A min1 , A min2 , A min3 , P min1 , P min2 , D min1 , D min2 ; 4) Determine whether there are other stored values ​​in the storage medium; If not, go to step 5); If yes, go to step 6); 5) 5.

1. Obtain the transmission value A; 5.

2. Turn on the atomizing motor; 5.

3. Calculate the duty cycle P of PWM; 5.

4. Output PWM to control the speed of the water pump; 5.

5. Calculate the control valve opening D; 5.

6. Opening degree of control valve D; 5.

7. Detect the current I of the atomizing motor; 5.

8. Determine whether the current I is equal to the current of the atomizer motor when it is idling; If so, record the transmission value A at this time as A max2 , and then proceed to step 5.9; If not, proceed to step 7); 5.

9. A max2 storing in a storage medium; 5.

10. Turn off the atomizing motor; 5.

11. Turn off the water pump and proceed to step 7); 6) 6.

1. Start timing; 6.

2. Read A1(n-1); 6.

3. Obtain the transmission value A; 6.

4. Calculate the ratio n = A1(n-1) / A1; 6.

5. Turn on the atomizing motor; 6.

6. Calculate the duty cycle P of PWM; 6.

7. Output PWM to control the speed of the water pump; 6.

8. Calculate the control valve opening D; 6.9, control valve opening degree D; 6.

10. Detect the current I of the atomizing motor; 6.

11. Determine whether the current I is equal to the current of the atomizer motor when it is idling; If so, record the transmission value A at this time as A maxn , and then proceed to step 6.12; If not, proceed to step 7); 6.

12. Whether the setting time has arrived; If so, A maxn Store it in the storage medium and max(n-1) Erase, and then proceed to step 6.13; If not, proceed to step 6.14; 6.

13. Timer reset; 6.

14. Turn off the water pump and atomizing motor, and then proceed to step 7); 7) End and return to step 1); Step 2) includes the following steps: 2.

1. Start; 2.

2. Pour water into the water tank; 2.

3. Water level reaches h min ; 2.

4. Read the transmission value A at this time, recorded as A min1 ; 2.

5. Adjust the appropriate water pump speed and control valve opening; 2.

6. Record the duty cycle P at this time min1 and control valve opening D min1 ; 2.

7. A min1 , P min1 , D min1 storing in a storage medium; 2.

8. Water level reaches h max ; 2.

9. Read the transmission value A at this time, record it as A max1 ; 2.

10. Adjust the appropriate water pump speed and control valve opening; 2.

11. Record the duty cycle P at this time max1 and control valve opening D max1 ; 2.

12. A max1 , P max1 and D max1 storing in a storage medium; 2.

13. Pour out the water in the water tank; 2.

14. End.

2. The drainage control method of the air-conditioning type range hood according to claim 1, characterized in that: The control valve (33) is installed at the water outlet of the water pump (32) or inside the water pump (32).

3. The drainage control method of the air-conditioning type range hood according to claim 1, characterized in that: Along the flow direction of the oil smoke, the atomizer (36) is arranged downstream of the condenser (12) and close to the air outlet of the smoke exhaust channel (21).

4. The air-conditioning type range hood according to claim 1, characterized in that: The condenser (12) and the evaporator (13) are both arranged to be inclined relative to the vertical plane.

5. The drainage control method of the air-conditioning type range hood according to claim 1, characterized in that: The smoke exhaust channel (21) comprises a first smoke exhaust channel (211) and a second smoke exhaust channel (212) which are independent of each other, and the condenser (12) is arranged in the first smoke exhaust channel (211).

6. The drainage control method of the air-conditioning type range hood according to claim 1, characterized in that: A fume extractor fan (23) is installed in the housing (20); along the flow direction of the fume, the smoke exhaust channel (21) is arranged downstream of the air outlet of the fume extractor fan (23); the smoke exhaust channel (21) and the air outlet channel (22) are both arranged above the fume extractor fan (23); and the smoke exhaust channel (21) and the air outlet channel (22) are arranged adjacent to each other on the left and right.

7. The drainage control method of the air-conditioning type range hood according to claim 1, characterized in that The step 5.3 and step 6.6 calculate the duty cycle P of PWM according to the following formula:

8. The drainage control method of the air-conditioning type range hood according to claim 7, characterized in that Steps 5.5 and 6.8 calculate the control valve opening D according to the following formula:

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