Air valve control method for air-conditioning type range hood

Abstract

A method for controlling an air valve of an air-conditioning type range hood, wherein a casing of the air-conditioning type range hood is provided with a smoke exhaust passage and an air outlet passage isolated from each other, the smoke exhaust passage comprising a first smoke exhaust passage and a second smoke exhaust passage, an air valve for switching the air passages between the first and second smoke exhaust passages is installed at the air outlet of the range hood fan, a first heat exchanger is installed in the first smoke exhaust passage, and a second heat exchanger is installed in the air outlet passage. During use by a user, the method for controlling the air valve of the air-conditioning type range hood diagnoses the working state of the air valve, and dynamically adjusts the control logic of the air valve according to the user's behavior habits, thereby avoiding the possibility that the air valve is adhered to the flue by oil stains due to long-term non-use of the air-conditioning mode, ensuring the working reliability of the air valve, and improving the reliability of the operation of the range hood. At the same time, in the air-conditioning cooling mode, the air valve is opened smoothly, so that the oil smoke airflow can flow through the condenser in the smoke exhaust passage to dissipate the heat of the condenser, thereby improving the energy efficiency of the air conditioner.

Description

Technical Field

[0001] The invention relates to an air-conditioning type range hood, and in particular to a method for controlling an air valve of the air-conditioning type range hood. 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. At present, there are products such as air-conditioning hoods on the market, that is, air-conditioning components are added on the basis of the range hood platform, which can realize all the functions of the range hood and the function of air conditioners at the same time. The prior art also discloses an air-conditioning range hood with a dual-channel structure, that is, the exhaust channel inside the range hood is divided into a first exhaust channel and a second exhaust channel, a range hood fan is installed inside the range hood, and one of the heat exchangers of the air-conditioning component is installed in the first exhaust channel. For the air-conditioning range hood operating in the cooling mode, the heat exchanger in the first exhaust channel becomes a condenser, so that the first exhaust channel constitutes a heat dissipation channel, and the second exhaust channel constitutes a direct exhaust channel. The air outlet of the range hood fan is installed with an air valve. When working in air-conditioning mode, taking the refrigeration condition as an example, the first smoke exhaust channel is opened and the second smoke exhaust channel is closed by switching the air valve, and the oil smoke airflow enters the first smoke exhaust channel and passes through the condenser to dissipate heat to the condenser; in the range hood working mode, the first smoke exhaust channel is closed and the second smoke exhaust channel is opened by switching the air valve, the condenser does not need to dissipate heat, and the oil smoke airflow is directly discharged through the second smoke exhaust channel.

[0003] It can be seen that different working modes need to be achieved by coordinating the switching of the air valve, and the opening and closing of the air valve is crucial for the air conditioning mode. For most air-conditioning range hoods, if the range hood mode is used for a long time without the air conditioning mode, the air valve is in a state of long-term closure of the first exhaust channel, and the oil smoke and oil stains in the smoke pipe will increase the viscosity of the flue, and even completely stick to the air valve. Therefore, when the air conditioning mode is used again, the air valve may not be able to open, causing the condenser to be unable to dissipate heat, and the air conditioning mode loses its cooling ability. If the air valve is not completely closed and the air valve is not in contact with the flue, although the possibility of the air valve being stuck to the oil stain can be avoided, due to the incomplete closure of the air valve, some oil smoke will enter the condenser, increasing the possibility of the condenser being blocked by oil smoke. In addition, adding new materials cannot completely avoid the possibility of the air valve and the flue sticking. Therefore, the control method of the reliability of the air valve operation is of great significance to the air conditioning range hood. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a method for controlling the air valve of an air-conditioning type range hood, which can diagnose the state of the air valve in real time and ensure the working reliability of the air valve, in view of the above-mentioned existing technical status.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: the air valve control method of the air-conditioning type range hood, the air-conditioning type range hood comprises a casing, a range hood fan is installed inside the casing, a mutually isolated smoke exhaust channel and an air outlet channel are arranged inside the casing, the smoke exhaust channel comprises a first smoke exhaust channel and a second smoke exhaust channel, an air valve for switching the air outlet of the range hood fan to be connected to the first smoke exhaust channel or the second smoke exhaust channel is installed at the air outlet of the range hood fan, a first heat exchanger is installed in the first smoke exhaust channel, a second heat exchanger is installed in the air outlet channel, and a compressor is also included, the compressor, the first heat exchanger and the second heat exchanger are connected through a refrigerant pipeline, and it is characterized in that: the air valve control method comprises the following steps:

[0006] S1: Process starts;

[0007] S2: the range hood is turned on;

[0008] S3: Determine whether the air conditioning mode is turned on;

[0009] If it is open, go to step S5;

[0010] If it is not turned on, the number of times the range hood is used K0 and the interval time T0 from the last use are recorded, and then the process goes to step S4;

[0011] S4: Determine whether the number of times the air conditioner is not used is greater than a set value Kmax, or whether the interval time T0 is greater than Tmax;

[0012] If the number of times the air conditioner has not been used is greater than the set value Kmax, or the interval time T0 is greater than Tmax, then proceed to step S5;

[0013] If the number of times the air conditioner has not been used is not greater than the set value Kmax, and the interval time T0 is not greater than Tmax, then proceed to step S11;

[0014] S5: Open the air valve and record the air valve starting current;

[0015] S6: Determine whether the air valve starting current is greater than the maximum setting value Imax;

[0016] If yes, turn on the range fumes exhaust fan and then go to step S7;

[0017] If not, proceed to step S10;

[0018] S7: The range fumes exhaust fan rotates forward and reversely at a speed Vref;

[0019] S8: Open the air valve motor;

[0020] S9: Determine whether the air valve starting current is greater than the maximum setting value Imax;

[0021] If yes, then increase the speed Vref of the range fumes exhaust fan, and then enter step S7;

[0022] If not, proceed to step S10;

[0023] S10: Determine whether the air valve starting current is greater than the initial setting value I0;

[0024] If yes, close the air valve again, then open the air valve again and go to step S5;

[0025] If not, proceed to step S11;

[0026] S11: The air valve has no abnormality and can be used normally;

[0027] S12: The process ends.

[0028] Preferably, an air conditioner is installed in the housing, the air conditioner includes an air outlet fan and the second heat exchanger, and the air conditioner has a return air port and an air conditioner outlet. In this way, the air duct between the return air port and the air conditioner outlet forms an air outlet channel, and the air conditioner outlet can smoothly discharge air under the action of the air outlet fan.

[0029] In order to make the structure more compact and the installation more convenient, the compressor is installed inside the casing, and the compressor is located outside the air outlet channel and the smoke exhaust channel.

[0030] In order to prevent the oil smoke from contaminating the first heat exchanger, an electrostatic purification device is installed in the first smoke exhaust channel, and along the flow direction of the oil smoke, the electrostatic purification device is arranged upstream of the first heat exchanger.

[0031] In order to make the air conditioner work in cooling mode, the first heat exchanger is a condenser and the second heat exchanger is an evaporator.

[0032] In order to utilize air-conditioning condensed water to dissipate heat from the condenser, a liquid distribution device for conveying condensed water condensed on the surface of the evaporator to the condenser is installed in the first smoke exhaust channel.

[0033] Further preferably, the smoke exhaust channel and the air outlet channel are both arranged above the range fumes suction fan, and the smoke exhaust channel and the air outlet channel are arranged adjacent to each other on the left and right.

[0034] As a preferred embodiment of any of the above schemes, the first smoke exhaust channel has an independent first smoke exhaust port, the second smoke exhaust channel has an independent second smoke exhaust port, a smoke pipe is installed on the top of the casing, the smoke pipe includes a first smoke inlet, a second smoke inlet and a smoke outlet, the first smoke inlet is connected to the first smoke exhaust port, and the second smoke inlet is connected to the second smoke exhaust port.

[0035] Compared with the prior art, the advantages of the present invention are: the air valve control method of the air-conditioning type range hood can diagnose the working status of the air valve during user use, and dynamically adjust the control logic of the air valve according to the user's behavior habits, thereby avoiding the possibility that the air valve is stuck to the flue due to long-term non-use of the air-conditioning mode, thereby ensuring the working reliability of the air valve and improving the reliability of the range hood operation. At the same time, in the air-conditioning cooling mode, the air valve is opened smoothly, which can make the oil fume airflow flow through the condenser in the smoke exhaust channel to dissipate the heat of the condenser, thereby improving the heat dissipation effect of the condenser, and thereby enhancing the refrigeration capacity of the air-conditioning range hood in the air-conditioning mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of an air-conditioning type range hood according to an embodiment of the present invention;

[0037] Figure 2 A schematic diagram of the principle of an air conditioning assembly according to an embodiment of the present invention;

[0038] Figure 3 This is a flow chart of the air valve control method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below with reference to the accompanying drawings.

[0040] like Figure 1 As shown, the air-conditioning range hood of this embodiment includes a casing 1, a range fume fan 2 is installed inside the casing 1, a smoke exhaust channel and an air outlet channel 4 are isolated from each other inside the casing 1, the smoke exhaust channel and the air outlet channel 4 are both arranged above the range fume fan 2, the smoke exhaust channel is arranged downstream of the air outlet of the range fume fan 2, and the smoke exhaust channel and the air outlet channel 4 are arranged adjacent to each other on the left and right.

[0041] The smoke exhaust channel of this embodiment includes a first smoke exhaust channel 31 and a second smoke exhaust channel 32. A damper 5 is installed at the air outlet of the fume extractor fan 2. The damper 5 rotates under the drive of a damper motor (not shown in the figure). The damper 5 is used to switch the air outlet of the fume extractor fan 2 to communicate with the first smoke exhaust channel 31 or the second smoke exhaust channel 32. A first heat exchanger 6 and an electrostatic purification device 11 are installed in the first smoke exhaust channel 31. In order to prevent the fume from contaminating the first heat exchanger 6, the electrostatic purification device 11 is arranged upstream of the first heat exchanger 6 along the flow direction of the fume. In addition, the first smoke exhaust channel 31 has an independent first smoke exhaust port 33, the second smoke exhaust channel 32 has an independent second smoke exhaust port 34, a smoke pipe 13 is installed on the top of the casing 1, the smoke pipe 13 includes a first smoke inlet 131, a second smoke inlet 132 and a smoke outlet 133, the first smoke inlet 131 is connected to the first smoke exhaust port 33, and the second smoke inlet 132 is connected to the second smoke exhaust port 34.

[0042] An air conditioner 10 is installed in the casing 1. The air conditioner 10 includes an air outlet fan 101 and a second heat exchanger 7. The air conditioner 10 has a return air port 102 and an air conditioner outlet port 103. An air outlet channel 4 is formed inside the air conditioner 10, that is, the air outlet fan 101 and the second heat exchanger 7 are installed in the air outlet channel 4. A compressor 8 is installed inside the casing 1 and on the left side of the range hood fan 2. The compressor 8, the first heat exchanger 6 and the second heat exchanger 7 are connected through a refrigerant pipeline 9. A refrigerant flows through the refrigerant pipeline 9. Common refrigerants can be water, ethylene glycol or propylene glycol, etc. The specific working principle of the air conditioning system is the same as that of the existing air conditioner, and will not be described in detail here.

[0043] When the air conditioner is working in cooling mode, the first heat exchanger 6 is a condenser and the second heat exchanger 7 is an evaporator. When the air conditioner is working in heating mode, the first heat exchanger 6 is an evaporator and the second heat exchanger 7 is a condenser. Taking the commonly used cooling mode as an example, when the range hood and the air conditioner are both turned on, the first smoke exhaust channel 31 is opened and the second smoke exhaust channel 32 is closed by switching the air valve 5, and the oil smoke airflow passes over the surface of the first heat exchanger 6, i.e., the condenser, to cool and dissipate the heat of the condenser, thereby reducing the temperature of the refrigerant flowing through the condenser, thereby improving the heat exchange effect of the condenser and further improving the energy efficiency of the air conditioner. At the same time, under the action of the indoor fan 101, cold air is sent into the kitchen room from the air outlet 103 of the air conditioner. The condensed water generated by the second heat exchanger 7, i.e., the evaporator, is transported to the first heat exchanger 6, i.e., the condenser, through the liquid distribution device 12, and the condensed water flows downward along the surface of the condenser. On the one hand, the condenser is further cooled to further improve the heat exchange effect of the condenser, thereby realizing effective utilization of condensed water. On the other hand, the condensed water can be evaporated after being heated by the condenser and then discharged from the first smoke exhaust channel 31, thereby eliminating the need for a condensed water discharge device.

[0044] In the range hood on-only mode, the first smoke exhaust channel 31 is closed and the second smoke exhaust channel 32 is opened by switching the air valve 5 , and the smoke is exhausted to the outside through the second smoke exhaust channel 32 .

[0045] Considering that the air valve 5 is easily stuck by the oil in the flue when the range hood is operated for a long time, the air valve 5 may not be opened smoothly when the range hood is started. In order to overcome the above problem, the air valve control method of this embodiment provides a solution. The specific steps of the control method are as follows:

[0046] S1: Process starts;

[0047] S2: the range hood is turned on;

[0048] S3: Determine whether the air conditioning mode is turned on;

[0049] If it is open, go to step S5;

[0050] If it is not turned on, the number of times the range hood is used K0 and the interval time T0 from the last use are recorded, and then the process goes to step S4;

[0051] S4: Determine whether the number of times the air conditioner is not used is greater than a set value Kmax, or whether the interval time T0 is greater than Tmax;

[0052] If the number of times the air conditioner has not been used is greater than the set value Kmax, or the interval time T0 is greater than Tmax, then proceed to step S5;

[0053] If the number of times the air conditioner has not been used is not greater than the set value Kmax, and the interval time T0 is not greater than Tmax, then proceed to step S11;

[0054] S5: Open the air valve 5 and record the air valve starting current;

[0055] S6: Determine whether the air valve starting current is greater than the maximum setting value Imax;

[0056] If yes, turn on the range fumes exhaust fan 2 and then go to step S7;

[0057] If not, proceed to step S10;

[0058] S7: The range hood fan 2 rotates forward and reversely at a speed Vref;

[0059] S8: Open the air valve motor;

[0060] S9: Determine whether the air valve starting current is greater than the maximum setting value Imax;

[0061] If yes, then increase the rotation speed Vref of the range fumes exhaust fan 2, and then enter step S7;

[0062] If not, proceed to step S10;

[0063] S10: Determine whether the air valve starting current is greater than the initial setting value I0;

[0064] If yes, close the air valve 5 again, then open the air valve 5 and go to step S5;

[0065] If not, proceed to step S11;

[0066] S11: The air valve 5 has no abnormality and can be used normally;

[0067] S12: The process ends.

[0068] Before the air valve 5 leaves the factory, the maximum starting current can be determined based on the selected air valve motor parameters, and other parameters can be calibrated in the laboratory.

[0069] The above control method is explained as follows: each time the air-conditioning range hood is used, record whether the air-conditioning mode is turned on. If it is not used for k consecutive times, it is considered that the air valve may be stuck; record the duration of each user's use. If it is greater than the effective duration, record the number of uses and the interval time, and store them in the single-chip microcomputer; during the longest interval, the fan is not started, the air valve is opened, the first smoke exhaust channel is opened, and the starting current is recorded; when the air valve starting current is greater than the set maximum starting current, stop starting the air valve to avoid damaging the air valve motor. When the air valve motor has no starting current, control The motor of the range hood fan rotates forward and reverse frequently at speed V0. The pulsating airflow generated by the forward and reverse rotation can loosen the damper plate. At this time, the damper motor is started again. If the starting current is still greater than the set maximum starting current, the forward and reverse speed of the fan motor is increased until the fan motor sets the maximum speed Vmax. If it still cannot be opened at this time, the abnormal opening fault of the damper is reported; when the damper starting current is less than the set maximum starting current and greater than the set initial starting current of the damper, the damper is opened normally, and then closed, and the starting current is recorded at the same time; until the starting current is approximately equal to the set initial starting current. At this time, it is considered that the damper can no longer be stuck; finally, the user's usage habits are recorded. If the air conditioning mode is not used for k consecutive times, the above steps are repeated.

[0070] The above control method can diagnose the working status of the air valve during user use, dynamically adjust the control logic of the air valve according to user behavior habits, ensure the working reliability of the air valve, and thus improve the operating reliability of the air-conditioning range hood.

Claims

1. A method for controlling an air valve of an air-conditioning range hood, the air-conditioning range hood comprising a casing (1), a range hood fan (2) being installed inside the casing (1), a smoke exhaust channel and an air outlet channel (4) being isolated from each other being provided inside the casing (1), the smoke exhaust channel comprising a first smoke exhaust channel (31) and a second smoke exhaust channel (32), an air valve (5) being installed at the air outlet of the range hood fan (2) for switching the air outlet of the range hood fan to be connected to the first smoke exhaust channel (31) or the second smoke exhaust channel (32), a first heat exchanger (6) being installed in the first smoke exhaust channel (31), a second heat exchanger (7) being installed in the air outlet channel (4), and a compressor (8) being further included, the compressor (8), the first heat exchanger (6) and the second heat exchanger (7) being connected via a refrigerant pipeline (9), characterized in that: The air valve control method comprises the following steps: S1: Process starts; S2: the range hood is turned on; S3: Determine whether the air conditioning mode is turned on; If it is open, go to step S5; If it is not turned on, the number of times the range hood is used K0 and the interval time T0 from the last use are recorded, and then the process goes to step S4; S4: Determine whether the number of times the air conditioner is not used is greater than a set value Kmax, or whether the interval time T0 is greater than Tmax; If the number of times the air conditioner has not been used is greater than the set value Kmax, or the interval time T0 is greater than Tmax, then proceed to step S5; If the number of times the air conditioner has not been used is not greater than the set value Kmax, and the interval time T0 is not greater than Tmax, then proceed to step S11; S5: Open the air valve and record the air valve starting current; S6: Determine whether the air valve starting current is greater than the maximum setting value Imax; If yes, turn on the range fumes exhaust fan and then go to step S7; If not, proceed to step S10; S7: The range fumes exhaust fan rotates forward and reversely at a speed Vref; S8: Open the air valve motor; S9: Determine whether the air valve starting current is greater than the maximum setting value Imax; If yes, then increase the speed Vref of the range fumes exhaust fan, and then enter step S7; If not, proceed to step S10; S10: Determine whether the air valve starting current is greater than the initial setting value I0; If yes, close the air valve again, then open the air valve again and go to step S5; If not, proceed to step S11; S11: The air valve has no abnormality and can be used normally; S12: The process ends.

2. The air valve control method of the air-conditioning type range hood according to claim 1, characterized in that: An air conditioner indoor unit (10) is installed in the casing (1), the air conditioner indoor unit (10) comprises an air outlet fan (101) and the second heat exchanger (7), and the air conditioner indoor unit (10) has a return air port (102) and an air conditioner outlet (103).

3. The air valve control method of the air-conditioning type range hood according to claim 1, characterized in that: The compressor (8) is installed inside the casing (1), and the compressor (8) is located outside the air outlet channel (4) and the smoke exhaust channel.

4. The air valve control method of the air-conditioning type range hood according to claim 1, characterized in that: An electrostatic purification device (11) is installed in the first smoke exhaust channel (31), and along the flow direction of the oil smoke, the electrostatic purification device (11) is arranged upstream of the first heat exchanger (6).

5. The air valve control method of the air-conditioning type range hood according to claim 1, characterized in that: The first heat exchanger (6) is a condenser, and the second heat exchanger (7) is an evaporator.

6. The air valve control method of the air-conditioning type range hood according to claim 5, characterized in that: A liquid distribution device (12) for conveying condensed water condensed on the surface of the evaporator to the condenser is installed in the first smoke exhaust channel (31).

7. The air valve control method of the air-conditioning type range hood according to claim 1, characterized in that: The smoke exhaust passage and the air outlet passage (4) are both arranged above the fume suction fan (2), and the smoke exhaust passage and the air outlet passage (4) are arranged adjacent to each other on the left and right.

8. The air valve control method of the air-conditioning type range hood according to any one of claims 1 to 7, characterized in that: The first smoke exhaust channel (31) has an independent first smoke exhaust port (33), the second smoke exhaust channel (32) has an independent second smoke exhaust port (34), a smoke pipe (13) is installed on the top of the housing (1), the smoke pipe (13) comprises a first smoke inlet (131), a second smoke inlet (132) and a smoke outlet (133), the first smoke inlet (131) is connected to the first smoke exhaust port (33), and the second smoke inlet (132) is connected to the second smoke exhaust port (34).

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