An air-conditioning range hood and its refrigeration and dehumidification dual-mode combined control method

Abstract

An air-conditioning range hood and its combined cooling and dehumidification dual-mode control method are disclosed. A compressor and a fume extraction fan are located within the range hood housing. A condenser is installed within the exhaust duct. Condensed water condensed on the surface of the evaporator in the air conditioner flows into a water box. Water in the water box is pumped to the condenser via a water pump. Condensed water flowing down the condenser surface flows back into the water box. A liquid level sensor is installed within the water box. A controller reads ambient temperature data monitored by the temperature sensor and liquid level data monitored by the liquid level sensor. When the ambient temperature is greater than a set minimum startup temperature, the controller selects cooling mode. When the liquid level data reaches a set warning value, the controller selects dehumidification mode. Advantages of the present invention include: the air-conditioning range hood switches between cooling and dehumidification modes through data feedback from the liquid level sensor. Furthermore, condensed water is not discharged externally, solving the drainage problem of large amounts of condensed water in dehumidification mode and achieving rapid dehumidification.

Description

Technical Field

[0001] The present invention relates to a range hood, in particular to an air-conditioning-type range hood and a refrigeration and dehumidification dual-mode combined control method thereof. Background Art

[0002] Kitchens are hot in the summer and cold in the winter, creating a need for both cooling and heating. To provide cool air in the summer and warm air in the winter, various air-conditioning range hoods have been invented. These range hoods feature an integrated air conditioning unit and an air outlet on the hood housing. These range hoods can operate in multiple modes. When the air conditioning mode is activated, the air outlets blow either cool or hot air directly toward the cook or into the kitchen, effectively enhancing the cooking experience. When air conditioning is activated, the condenser in the air conditioning unit generates heat. If heat is not effectively dissipated from the condenser, this will affect the condenser's heat transfer efficiency, reducing air conditioning efficiency. Furthermore, condensation forms on the evaporator surface. Discharging this condensation requires an external pipe, which not only increases installation costs but also causes long-term wall corrosion and dripping into the environment. If condensation accumulates within the range hood, it can cause localized leaks and even disrupt its operation. When an air-conditioning range hood is not used in air-conditioning mode for a long time, the heat exchange components will accumulate a lot of dust when idle for a long time, affecting the performance of the air conditioner. In addition, when the air humidity is high, dehumidification is required to improve comfort. Existing air-conditioning range hoods produce inconsistent condensation water in cooling mode and dehumidification mode. Under the premise that the condensation water is not discharged, it is necessary to accurately control and identify the two modes to complete the condensation water treatment. In cooling mode, users require low-temperature air, while in dehumidification mode, users have no requirements for air output, but they need to quickly reduce the ambient humidity. The purpose of achieving rapid gas replacement and reducing ambient humidity is to achieve the goal of rapid gas replacement and reducing ambient humidity. Existing air-conditioning range hoods cannot achieve interoperability between cooling mode and dehumidification mode. Summary of the Invention

[0003] The first technical problem to be solved by the present invention is to provide an air-conditioning-type range hood that can condense water without external discharge and has a cooling mode and a dehumidification mode 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 cooling and dehumidification dual-mode combined control method for an air-conditioning range hood that can realize the intercommunication between the cooling mode and the dehumidification mode 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: the air-conditioned range hood includes a casing, a compressor and a range hood fan are arranged in the casing, a smoke exhaust channel is formed downstream of the range hood fan, an air-conditioning indoor unit is installed on the casing, the air-conditioning indoor unit includes an evaporator, a condenser is installed in the smoke exhaust channel, the compressor, condenser and evaporator are connected by a refrigerant pipeline, and the characteristic is that a water box is provided in the casing, the condensed water condensed on the surface of the evaporator can flow into the water box, the water in the water box is transported to the condenser through a water pump, and the condensed water flowing down from the surface of the condenser flows back into the water box, and also includes a temperature sensor, a liquid level sensor and a controller, the liquid level sensor is installed in the water box, the controller can read the ambient temperature data monitored by the temperature sensor and the liquid level data monitored by the liquid level sensor, and can choose to enter the cooling mode when the ambient temperature is greater than the set minimum start-up temperature, and enter the dehumidification mode when the liquid level data reaches the set warning value.

[0006] In order to distribute the air-conditioning condensed water to the condenser and recycle the unevaporated condensed water, a water receiving pan for receiving the condensed water condensed on the surface of the evaporator is provided at the bottom of the air-conditioning indoor unit, a liquid distributor is installed on the top of the condenser, and a water receiving box for receiving the condensed water that can flow down from the surface of the condenser is provided below the condenser. The water outlet of the water receiving pan is connected with the water inlet of the water box, and the water outlet of the water box is connected with the water inlet of the liquid distributor. The condensed water in the water box is transported to the liquid distributor by the water pump, and the water outlet of the water receiving box is connected with the return water outlet of the water box.

[0007] Further preferably, the exhaust passage includes a first exhaust passage and a second exhaust passage, and a damper is installed at the outlet of the range hood fan for switching one of the first and second exhaust passages to communicate with the range hood fan outlet. The condenser is disposed within the first exhaust passage. Thus, the range hood has a dual-channel structure, with the first exhaust passage constituting a heat dissipation passage and the second exhaust passage constituting a direct exhaust passage. In different operating modes, the damper is switched to open the corresponding exhaust passage.

[0008] In order to prevent the oil smoke from contaminating the condenser, an oil smoke purification device is installed in the first smoke exhaust channel. Along the flow direction of the oil smoke, the oil smoke purification device is arranged upstream of the condenser.

[0009] Further preferably, the first smoke exhaust channel has a first smoke exhaust port, the second smoke exhaust channel has a second smoke exhaust port, and the first smoke exhaust port and the second smoke exhaust port are independent of each other.

[0010] The temperature sensor can be installed at a plurality of different positions. Preferably, the temperature sensor is installed on the manifold of the condenser or at the air inlet of the indoor unit of the air conditioner.

[0011] The technical solution adopted by the present invention to solve the second technical problem is: a cooling and dehumidification dual-mode combined control method of the air-conditioning range hood, characterized by comprising the following steps:

[0012] S1: Start the process, the user chooses to turn on the air conditioner;

[0013] S2: The temperature sensor monitors the ambient temperature and feeds the data back to the controller;

[0014] S3: If the monitored ambient temperature is lower than the set minimum startup temperature, the user is prompted that the air conditioning function cannot be turned on and the operation is stopped; if the monitored ambient temperature is higher than the set minimum startup temperature, the process proceeds to step S4;

[0015] S4: Enter the user mode selection. The user selects the cooling mode. The controller sends a control signal and performs the following three actions:

[0016] a: Turn on the indoor unit of the air conditioner and run it according to the preset gear;

[0017] b: Turn on the compressor and run continuously;

[0018] c: Turn on the water pump, use the preset start / stop water supply frequency, and continue to supply water to the liquid distributor;

[0019] S5: The liquid level sensor feeds back the liquid level data, which is compared with the set water level value to determine whether the liquid level data increases. If it increases, the process proceeds to step S6; if not, the process proceeds to step S8;

[0020] S6: Determine whether the liquid level value reaches the refrigeration liquid level warning value. If it reaches, proceed to step S9; if not, proceed to step S7;

[0021] S7: Repeat step S5;

[0022] S8: Determine whether the user chooses to end the cooling mode. If the user chooses to end the cooling mode, proceed to step S11. If the user does not choose to end the cooling mode, proceed to step S6.

[0023] S9: Enter the dehumidification mode and execute the actions of the following three functional units;

[0024] a: The gear of the indoor unit of the air conditioner is lowered to a low gear and the minimum air volume is turned on;

[0025] b: The compressor is controlled by the timer switch and operates at the set on / off frequency;

[0026] c: Under the control of the timer switch, the water pump switches to continuous operation and continuously pumps water into the liquid distributor;

[0027] S10: The liquid level sensor continues to monitor the liquid level data, compares it with the set water level value, and determines whether the liquid level data has reached the maximum value of the dehumidification mode operation liquid level; if not, repeat step S10; if so, proceed to step S11;

[0028] S11: The compressor stops running, the air conditioner indoor unit stops running, and the water pump keeps running;

[0029] S12: Determine whether the user chooses to shut down the device. If the user does not force shut down the device, continue with step S11. If the user chooses to force shut down the device, proceed to step S13.

[0030] S13: Turn off the water pump and enter the standby mode to wait. The process ends.

[0031] Preferably, the preset gear in action a of step S4 is the maximum air volume gear;

[0032] Preferably, in action c of step S4, the water pump is started to first adopt a water supply frequency with a larger on-time / off-time ratio, run for 8 to 12 cycles, and then switch to a water supply frequency with a smaller on-time / off-time ratio.

[0033] Preferably, the on-off frequency of the compressor in action b of step S9 is 9 minutes to 11 minutes for on-time and 5 minutes to 7 minutes for off-time.

[0034] Preferably, in step S10, the liquid level sensor collects data every 400 to 600 ms.

[0035] Compared with the prior art, the advantages of the present invention are: the air-conditioning type range hood installs the liquid level sensor in the water box, the controller can read the ambient temperature data monitored by the temperature sensor and the liquid level data monitored by the liquid level sensor, and can choose to enter the cooling mode when the ambient temperature is greater than the set minimum start-up temperature, and enter the dehumidification mode when the liquid level data reaches the set warning value. The switching between the cooling mode and the dehumidification mode is realized through the data feedback of the liquid level sensor, and the condensed water is not discharged externally, which solves the drainage problem of large amount of condensed water in the dehumidification mode and realizes rapid dehumidification. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0038] Figure 3 A schematic structural diagram of a waterway system according to an embodiment of the present invention;

[0039] Figure 4 Schematic diagram of a cooling and dehumidification dual-mode control system for an air-conditioning range hood according to an embodiment of the present invention;

[0040] Figure 5 This is a control logic diagram of the cooling and dehumidification dual-mode control method of the air-conditioning range hood according to an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0042] like Figure 1 and Figure 2 As shown, the air-conditioning range hood of this embodiment includes a housing 1, within which are mounted a range hood fan 2, an air conditioner 4, a compressor 5, and a condenser 6. The air conditioner 4 includes an evaporator 41. The compressor 5, condenser 6, and evaporator 41 are interconnected via a refrigerant line 18. A throttling device 1 is installed on the refrigerant line 18 between the condenser 6 and evaporator 41. The air conditioner 4 has an air inlet and an air outlet. An air outlet fan 42 is mounted within the housing of the air conditioner 4. An air outlet 17 is provided on the housing 1 and is connected to the outlet of the air outlet fan 42. When operating in air conditioning mode, cool air is blown out from the air outlet 17.

[0043] A smoke exhaust channel 3 is formed inside the housing 1 and downstream of the range fume blower 2. The smoke exhaust channel 3 of this embodiment includes a first smoke exhaust channel 31 and a second smoke exhaust channel 32. A damper 15 is installed at the outlet of the range fume blower 2. By switching the damper 15, one of the first smoke exhaust channel 31 and the second smoke exhaust channel 32 is connected to the outlet of the range fume blower 2. The condenser 6 of this embodiment is arranged in the first smoke exhaust channel 31. In order to prevent oil smoke from contaminating the condenser 6, an oil fume purification device 16 is installed in the first smoke exhaust channel 31. Along the direction of oil fume flow, the oil fume purification device 16 is arranged upstream of the condenser 6. In addition, in this embodiment, the condenser 6 is tilted relative to the vertical plane, and the liquid distributor 13 is installed on the top of the condenser 6, with the water outlet of the liquid distributor 13 facing the condenser 6. The condensed water flowing out of the water outlet of the liquid distributor 13 can flow downward along the surface of the condenser 6.

[0044] The first smoke exhaust channel 31 constitutes a heat dissipation channel, and the second smoke exhaust channel 32 constitutes a straight exhaust channel. Figure 1 As shown, the first smoke exhaust channel 31 is in an open state, and the second smoke exhaust channel 32 is in a closed state. The oil smoke is discharged outward from the first smoke exhaust channel 31. When the air valve 15 is switched, the first smoke exhaust channel 31 is closed and the second smoke exhaust channel 32 is opened, and the oil smoke is discharged outward from the second smoke exhaust channel 32. In this embodiment, the first smoke exhaust channel 31 has a first smoke exhaust port 33, and the second smoke exhaust channel 32 has a second smoke exhaust port 34. The first smoke exhaust port 33 and the second smoke exhaust port 34 are independent of each other.

[0045] Combine Figure 3 As shown, a water receiving pan 12 is provided at the bottom of the air conditioner indoor unit 4 to receive the condensed water condensed on the surface of the evaporator 41. A water receiving box 14 is provided below the condenser 6 to receive the condensed water flowing down from the surface of the condenser 6. A water box 7 is also installed in the housing 1. The water outlet of the water receiving pan 12 is connected to the water inlet of the water box 7, and the water outlet of the water box 7 is connected to the water inlet of the liquid distributor 13. The water in the water box 7 is transported to the liquid distributor 13 by the water pump 8. The water outlet of the water receiving box 14 is connected to the water return port of the water box 7.

[0046] When only the range hood is turned on, the first smoke exhaust channel 31 is closed and the second smoke exhaust channel 32 is opened through the air valve 15 , and the oil smoke is discharged to the outside through the second smoke exhaust channel 32 .

[0047] When operating in air conditioning mode (cooling mode), condensed water condensed on the evaporator 41 flows into the water receiving tray 12, and the condensed water in the water receiving tray 12 flows into the water box 7. The condensed water in the water box 7 is transported to the liquid distributor 13 by the action of the water pump 8, and then flows from the liquid distributor 13 to the surface of the condenser 6. On the one hand, it cools the condenser 6, further improving its heat exchange effect and realizing the effective utilization of the condensed water. On the other hand, the condensed water is heated and evaporated by the condenser 6 and discharged from the first smoke exhaust channel 31. The condensed water that has not evaporated flows into the water receiving tray 14 and returns to the water box 7 for reuse. At the same time, the air outlet 17 of the air conditioner blows out cold air to enhance the user's cooking experience.

[0048] In this embodiment, a temperature sensor 9 is installed at the collecting pipe of the condenser 6 or the air inlet position of the air conditioner indoor unit 4, and a liquid level sensor 10 is installed in the water box 7. The controller 11 can read the ambient temperature data monitored by the temperature sensor 9 and the liquid level data monitored by the liquid level sensor 10, and can choose to enter the cooling mode when the ambient temperature is greater than the set minimum start-up temperature, and enter the dehumidification mode when the liquid level data reaches the set warning value.

[0049] like Figure 4 and Figure 5 As shown, the cooling and dehumidification dual-mode combined control method of the air-conditioning range hood of this embodiment includes the following steps:

[0050] S1: Start the process, the user chooses to turn on the air conditioner;

[0051] S2: The temperature sensor 9 monitors the ambient temperature and feeds the data back to the controller 11;

[0052] S3: If the monitored ambient temperature is lower than the set minimum startup temperature, the user is prompted that the air conditioning function cannot be turned on and the operation is stopped; if the monitored ambient temperature is higher than the set minimum startup temperature, the process proceeds to step S4;

[0053] S4: Entering the user mode selection, the user selects the cooling mode, the controller 11 sends a control signal and performs the following three actions:

[0054] a: Turn on the air conditioner indoor unit 4 and run it according to the preset gear;

[0055] b: Turn on compressor 5 and run continuously;

[0056] c: Start the water pump 8 and continue to supply water to the liquid distributor 13 using the preset start / stop water supply frequency;

[0057] S5: The liquid level sensor 10 feeds back liquid level data, which is compared with the set water level value to determine whether the liquid level data increases. If so, the process proceeds to step S6; if not, the process proceeds to step S8;

[0058] S6: Determine whether the liquid level value reaches the refrigeration liquid level warning value. If it reaches, proceed to step S9; if not, proceed to step S7;

[0059] S7: Repeat step S5;

[0060] S8: Determine whether the user chooses to end the cooling mode. If the user chooses to end the cooling mode, proceed to step S11. If the user does not choose to end the cooling mode, proceed to step S6.

[0061] S9: Enter the dehumidification mode and execute the actions of the following three functional units;

[0062] a: The air conditioner's indoor unit's 4th gear is lowered to the lowest gear, and the minimum air volume is turned on;

[0063] b: Compressor 5 is controlled by the timer switch and switches to run at the set on / off frequency;

[0064] c: The water pump 8 is switched to continuous operation under the control of the timer switch, continuously pumping water into the liquid distributor 13;

[0065] S10: The liquid level sensor 10 continues to monitor the liquid level data, compares it with the set water level value, and determines whether the liquid level data has reached the maximum value of the dehumidification mode operation liquid level; if not, repeat step S10; if so, proceed to step S11;

[0066] S11: The compressor 5 stops running, the air conditioner indoor unit 4 stops running, and the water pump 8 keeps running;

[0067] S12: Determine whether the user chooses to shut down the device. If the user does not force shut down the device, continue with step S11. If the user chooses to force shut down the device, proceed to step S13.

[0068] S13: Turn off the water pump 8, enter the standby mode and wait, and the process ends.

[0069] Among them, the minimum start-up temperature in step S3 can be set to 18°C. The preset gear in action a of step S4 is the maximum air volume gear; in action c of step S4, the water pump 8 is turned on and first uses a water supply frequency with a larger on-time / off-time ratio, such as 5 seconds on, 2 seconds off, and runs for 10 cycles, and then switches to a water supply frequency with a smaller on-time / off-time ratio, such as 2 seconds on, 15 seconds off; in addition, step S4 can also display the cooling mode on through the display panel. In step S9, the on-off frequency of the compressor 5 is 9 minutes to 11 minutes on, 5 minutes to 7 minutes off, for example, a frequency of 10 minutes on, 6 minutes off can be used. By starting and stopping the compressor 5, the amount of condensed water produced can be controlled. In step S10, the liquid level sensor 10 collects data every 400 to 600 ms, and can avoid collecting data every 500 ms.

Claims

1. An air-conditioning range hood, comprising a housing (1), wherein a compressor (5) and a range hood fan (2) are provided in the housing (1), a smoke exhaust passage (3) is formed downstream of the range hood fan (2), an air-conditioning indoor unit (4) is mounted on the housing (1), the air-conditioning indoor unit (4) includes an evaporator (41), a condenser (6) is mounted in the smoke exhaust passage (3), the compressor (5), the condenser (6) and the evaporator (41) are connected via a refrigerant pipeline (18), and the invention is characterized in that: A water box (7) is provided in the casing (1), and condensed water condensed on the surface of the evaporator (41) can flow into the water box (7). The water in the water box (7) is transported to the condenser (6) through a water pump (8), and the condensed water flowing down from the surface of the condenser (6) flows back into the water box (7). The casing (1) also includes a temperature sensor (9), a liquid level sensor (10) and a controller (11). The liquid level sensor (10) is installed in the water box (7). The controller (11) can read the ambient temperature data monitored by the temperature sensor (9) and the liquid level data monitored by the liquid level sensor (10), and can select to enter the cooling mode when the ambient temperature is greater than the set minimum start-up temperature, and can select to enter the dehumidification mode when the liquid level data reaches the set warning value.

2. The air-conditioning type range hood according to claim 1, characterized in that: A water receiving pan (12) for receiving condensed water condensed on the surface of the evaporator (41) is provided at the bottom of the air conditioner indoor unit (4), a liquid distributor (13) is installed on the top of the condenser (6), and a water receiving box (14) for receiving condensed water that can flow down from the surface of the condenser (6) is provided below the condenser (6). The water outlet of the water receiving pan (12) is connected to the water inlet of the water box (7), and the water outlet of the water box (7) is connected to the water inlet of the liquid distributor (13). The condensed water in the water box (7) is transported to the liquid distributor (13) by the water pump (8), and the water outlet of the water receiving box (14) is connected to the return water outlet of the water box (7).

3. The air-conditioning type range hood according to claim 1, characterized in that: The smoke exhaust channel (3) comprises a first smoke exhaust channel (31) and a second smoke exhaust channel (32); a damper (15) is installed at the outlet of the range fumes exhaust fan (2) for switching one of the first smoke exhaust channel (31) and the second smoke exhaust channel (32) to be connected to the outlet of the range fumes exhaust fan (2); and the condenser (6) is arranged in the first smoke exhaust channel (31).

4. The air-conditioning type range hood according to claim 3, characterized in that: An oil fume purification device (16) is installed in the first smoke exhaust channel (31), and along the flow direction of the oil fume, the oil fume purification device (16) is arranged upstream of the condenser (6).

5. The air-conditioning type range hood according to claim 1, characterized in that: The temperature sensor (9) is installed on the manifold of the condenser (6) or at the air inlet of the indoor unit (4) of the air conditioner.

6. A cooling and dehumidification dual-mode combined control method for an air-conditioning range hood as claimed in claim 2, characterized in that The steps include: S1: Start the process, the user chooses to turn on the air conditioner; S2: The temperature sensor monitors the ambient temperature and feeds the data back to the controller; S3: If the monitored ambient temperature is lower than the set minimum startup temperature, the user is prompted that the air conditioning function cannot be turned on and the operation is stopped; if the monitored ambient temperature is higher than the set minimum startup temperature, the process proceeds to step S4; S4: Enter the user mode selection. The user selects the cooling mode. The controller sends a control signal and performs the following three actions: a: Turn on the indoor unit of the air conditioner and run it according to the preset gear; b: Turn on the compressor and run continuously; c: Turn on the water pump, use the preset start / stop water supply frequency, and continue to supply water to the liquid distributor; S5: The liquid level sensor feeds back the liquid level data, which is compared with the set water level value to determine whether the liquid level data increases. If it increases, the process proceeds to step S6; if not, the process proceeds to step S8; S6: Determine whether the liquid level value reaches the refrigeration liquid level warning value. If it reaches, proceed to step S9; if not, proceed to step S7; S7: Repeat step S5; S8: Determine whether the user chooses to end the cooling mode. If the user chooses to end the cooling mode, proceed to step S11. If the user does not choose to end the cooling mode, proceed to step S6. S9: Enter the dehumidification mode and execute the actions of the following three functional units; a: The gear of the indoor unit of the air conditioner is lowered to a low gear and the minimum air volume is turned on; b: The compressor is controlled by the timer switch and operates at the set on / off frequency; c: Under the control of the timer switch, the water pump switches to continuous operation and continuously pumps water into the liquid distributor; S10: The liquid level sensor continues to monitor the liquid level data, compares it with the set water level value, and determines whether the liquid level data has reached the maximum value of the dehumidification mode operation liquid level; if not, repeat step S10; if so, proceed to step S11; S11: The compressor stops running, the air conditioner indoor unit stops running, and the water pump keeps running; S12: Determine whether the user chooses to shut down the device. If the user does not force shut down the device, continue with step S11. If the user chooses to force shut down the device, proceed to step S13. S13: Turn off the water pump and enter the standby mode to wait. The process ends.

7. The cooling and dehumidification dual-mode combined control method for an air-conditioning range hood according to claim 6, characterized in that: The preset gear position in action a of step S4 is the maximum air volume gear position.

8. The cooling and dehumidification dual-mode combined control method for an air-conditioning range hood according to claim 6, characterized in that: In action c of step S4, the water pump is started and firstly a water supply frequency with a larger on-time / off-time ratio is used, and it runs for 8 to 12 cycles, and then switched to a water supply frequency with a smaller on-time / off-time ratio.

9. The cooling and dehumidification dual-mode combined control method for an air-conditioning range hood according to claim 6, characterized in that: The on-off frequency of the compressor in action b of step S9 is 9 minutes to 11 minutes for on-time and 5 minutes to 7 minutes for off-time.

10. The cooling and dehumidification dual-mode combined control method of the air-conditioning range hood according to claim 6, characterized in that: In step S10, the liquid level sensor collects data every 400 to 600 ms.

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