Refrigeration type range hood and control method thereof

Abstract

According to the refrigeration type range hood and the control method thereof, a ventilation opening is formed in the annular wall of a fan volute, an air guide valve used for guiding hot air blown out by a cooling fan into the volute is installed at the ventilation opening, and an inner side pressure sensor is installed on the inner side wall, facing the interior of the volute, of the air guide valve; an outer side pressure sensor is installed on the outer side wall, facing the outside of the volute, of the air guide valve, and the controller can receive output signals of the inner side pressure sensor and the outer side pressure sensor and control the motor according to the received signals so as to adjust the rotating angle of the air guide valve. According to the refrigeration type oil fume extractor, hot air blown out by the cooling fan is guided into the volute through the ventilation opening, on one hand, the working efficiency of an air conditioner is improved, and on the other hand, the hot air is blown into the volute to clean the volute and the impeller; the controller can dynamically adjust the opening degree of the air guide valve according to the internal and external pressure difference, and it is guaranteed that the air guide valve is in the optimal state.

Description

Technical Field

[0001] The invention relates to a range hood, in particular to a refrigeration range hood and a control method thereof. Background Art

[0002] Various refrigeration-type range hoods are disclosed in the prior art. An air conditioning component is added to the range hood platform. The compressor, condenser and evaporator are connected through a refrigerant pipeline. The refrigeration-type range hood can realize all the functions of the range hood and the function of the air conditioner. During the daily use of the refrigeration range hood, a large amount of grease will remain on the volute and impeller. After a long period of air drying and solidification, these grease will form a hard grease layer on the volute and impeller, which is very difficult to clean. Traditional range hoods on the market often do not have a cleaning function. Even if a cleaning function is added, it is simply to add a water pump and a heating rod to heat and spray the water added from the outside for cleaning. Additional components need to be added, which reduces the reliability of the whole machine. At the same time, it is necessary to add a water source from the outside, which increases the complexity. Although, in the prior art, there are also disclosed range hoods that use controlled condensed water to clean the volute, such as the "A Kind of Air-conditioning Range Hood" disclosed in the Chinese utility model patent with patent number 202220018984.6 (authorization announcement number CN 217004584 U), the range hood has a water collection box for collecting condensed water condensed on the surface of the evaporator, and a steam generator is installed inside the housing. The water collection box is connected to the water inlet of the steam generator through a water outlet pipe, and the steam outlet of the steam generator is connected to the air duct inside the range hood fan. The air-conditioning condensed water evaporates through the steam generator and enters the range hood fan, and the high-temperature water vapor passes through the fan impeller to clean the impeller. Although the air-conditioning range hood uses condensed water to clean the fan impeller, it is necessary to use the steam generator inside the housing to heat the condensed water, which is not only complicated in structure, but also increases the cost, and the heat generated by the condenser when the air conditioner is working is not effectively utilized. In addition, the "Fan volute intermediate plate guide vane air inlet structure of range hood" disclosed in the Chinese utility model patent with patent number 201220666311.8 (authorization announcement number CN 203051230 U) includes an annular intermediate plate connected to the front cover plate and the rear cover plate of the volute. The angle of the volute tongue at the front end of the annular intermediate plate is designed to prevent the air volume from not entering the outlet and flowing back to the volute at an optimal angle. An air inlet is opened at the rear end of the volute tongue, and an air inlet is opened at the rear end of the annular intermediate plate volute tongue. After the impeller blades pass through the volute tongue, the air flow is immediately introduced from the air inlet through the air inlet guide plate, so that the fan efficiency is improved and the air volume at the outlet is increased. However, the air inlet structure cannot adjust the air intake volume of the air inlet, and the degree of intelligence is insufficient. Summary of the invention

[0003] The first technical problem to be solved by the present invention is to provide a refrigeration range hood capable of intelligently adjusting the air intake volume of the heat dissipation fan entering the range hood fan 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 control method for the above-mentioned refrigeration type range hood in view of 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 refrigeration type range hood includes a range hood module, a compressor, a heat dissipation module and an indoor module, the range hood module includes a range hood fan, the compressor, the heat dissipation module and the indoor module are connected through a refrigerant pipeline, the heat dissipation module and the indoor module are arranged outside the range hood fan, the range hood fan includes a volute and an impeller installed inside the volute, the heat dissipation module has a heat dissipation fan, characterized in that: a vent is opened on the volute ring wall of the range hood fan, an air guide valve for introducing hot air blown out of the heat dissipation fan into the interior of the volute is installed at the vent, an inner pressure sensor is installed on the inner side wall of the air guide valve facing the interior of the volute, and an outer pressure sensor is installed on the outer side wall of the air guide valve facing the outside of the volute, and also includes a controller and a motor for driving the air guide valve to rotate, the controller can receive output signals of the inner pressure sensor and the outer pressure sensor, and control the motor according to the received signals, thereby adjusting the rotation angle of the air guide valve.

[0006] Preferably, the air guide portion of the air guide valve is a flat plate, and the angle A between the tangent line of the volute ring wall at the root of the air guide valve and the air guide valve is in the range of 10°≤A≤50°. The air guide valve adopts the above angle range, which can effectively guide the wind of the heat dissipation fan into the volute of the range hood, and prevent the wind in the volute of the range hood from overflowing through the vent.

[0007] Further preferably, the length B of the air guide valve is in the range of 10 mm ≤ B ≤ 60 mm.

[0008] Further preferably, a volute tongue is installed on the volute ring wall, the vertical distance between the edge of the air guide valve closest to the impeller and the outer peripheral surface of the impeller is L1, the vertical distance between the edge of the volute tongue closest to the impeller and the outer peripheral surface of the impeller is L2, and 0≤L1-L2≤6mm is satisfied.

[0009] In a further preferred embodiment, the vent is opened at the front section of the volute ring wall, the air guide valve is installed at the front edge of the vent, and the length of the air guide valve changes with the position of the vent. The vent is relatively close to the root of the volute tongue, the shorter the air guide valve is, the farther the vent is from the volute tongue, and the longer the air guide valve is. This arrangement allows the hot air blown out by the heat dissipation fan to enter the volute more smoothly. At the same time, when there is back pressure at the fan outlet, the wind inside the volute can be prevented from overflowing from the vent.

[0010] In order to make the airflow blown out by the heat dissipation fan enter the interior of the range fumes exhaust fan more smoothly, the range fumes exhaust fan and the heat dissipation fan are both centrifugal fans, and the central axis of the impeller of the range fumes exhaust fan is parallel to the central axis of the impeller of the heat dissipation fan.

[0011] Preferably, the fume extraction module comprises an upper box body and an air inlet body arranged at the bottom of the upper box body, the fume extraction fan is installed inside the upper box body, and the air inlet body is provided with a fume inlet connected to the air inlet of the fume extraction fan.

[0012] The heat dissipation module can have a variety of installation structures. Preferably, the heat dissipation module is arranged on the top of the upper box body, the heat dissipation fan is arranged above the range fumes fan, and the air outlet of the heat dissipation fan faces downward and toward the vent.

[0013] The heat dissipation module and the indoor unit module may have multiple installation structures. Preferably, the heat dissipation module includes a condenser and the heat dissipation fan, and the indoor unit module includes an evaporator and an indoor unit fan. The heat dissipation module and the indoor unit module are arranged adjacent to each other.

[0014] The technical solution adopted by the present invention to solve the second technical problem is: a control method of the refrigeration range hood, characterized in that: the control method comprises the following steps:

[0015] S1, start;

[0016] S2. If the user turns on the range hood, proceed to steps S4 to S10;

[0017] S3. If the user only turns on the cooling function, proceed to steps S11 to S16;

[0018] S4, the range fumes exhaust fan starts to operate;

[0019] S5, determining whether the user turns on the cooling function;

[0020] If it is on, go to step S6;

[0021] If not, return to step S4;

[0022] S6, the motor drives the air guide valve to open, the inner pressure sensor detects the pressure F1, the outer pressure sensor detects the pressure F2, and the inner and outer pressure difference ΔF = F1 - F2;

[0023] S7, judging whether ΔF is a maximum value;

[0024] If yes, proceed to step S8;

[0025] If not, return to step S6;

[0026] S8, whether ΔF is not greater than Fn;

[0027] If yes, proceed to step S9;

[0028] If not, the motor drives the air guide valve to rotate, and returns to step S8;

[0029] S9, the motor stops working and the air guide valve remains in the current state;

[0030] S10: If the user adjusts the range hood position, the process returns to step S7;

[0031] If the user turns off the cooling function, the air guide valve closes and the process ends.

[0032] S11, the motor drives the air guide valve to open, the range hood is set to low gear by default, the inner pressure sensor detects the pressure F1, the outer pressure sensor detects the pressure F2, and the inner and outer pressure difference ΔF = F1 - F2;

[0033] S12, judging whether ΔF is a maximum value;

[0034] If yes, proceed to step S13;

[0035] If not, return to step S11;

[0036] S13, whether ΔF is not greater than Fn;

[0037] If yes, proceed to step S14;

[0038] If not, the motor drives the air guide valve to rotate, and the process returns to step S13;

[0039] S14, the motor stops working, and the air guide valve remains in the existing state;

[0040] S15, the user turns off the cooling function;

[0041] S16, the air guide valve is closed and the process ends.

[0042] Compared with the prior art, the advantages of the present invention are: the refrigeration type range hood introduces the hot air from the heat dissipation channel into the interior of the volute of the range hood fan through the vents on the volute ring wall, and the negative pressure generated by the rotation of the range hood fan draws the hot air into the interior of the volute. On the one hand, it is beneficial to improve the working efficiency of the air conditioner, and on the other hand, the hot air blown into the interior of the volute can clean the volute and the impeller. In addition, the air guide valve installed at the vent has internal and external pressure sensors, and the controller can dynamically adjust the opening of the air guide valve according to the internal and external pressure difference to ensure that the air guide valve is in the best state. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 A schematic diagram of the structure of a range hood according to an embodiment of the present invention;

[0044] Figure 2 is a side view of a range hood according to an embodiment of the present invention;

[0045] Figure 3 A connection diagram of an air conditioning assembly according to an embodiment of the present invention;

[0046] Figure 4 This is a schematic diagram of the installation structure of the air guide valve according to an embodiment of the present invention;

[0047] Figure 5 A control logic diagram of a control method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0048] The present invention is further described in detail below with reference to the accompanying drawings.

[0049] like Figures 1 to 4 As shown, the refrigeration range hood of this embodiment includes a range hood module 1, a compressor 2, a heat dissipation module 3 and an internal module 4. The range hood module 1 includes a range hood fan 11, an upper box body 12 and an air inlet body 13. The range hood fan 11 is installed inside the upper box body 12, and the air inlet body 13 is installed at the bottom of the upper box body 12. The air inlet body 13 is provided with a smoke inlet connected to the air inlet of the range hood fan 11. The range hood fan 11 is a centrifugal fan, including a volute 111, an impeller 112 and a volute tongue 113. The volute tongue 113 is installed on the volute ring wall 114 and close to the fan outlet.

[0050] The compressor 2 is installed above the air inlet body 13 and is located on the right side of the upper box body 12, and the indoor unit module 4 is arranged above the compressor 2. The heat dissipation module 3 is arranged at the top of the upper box body 12, and the heat dissipation module 3 and the indoor unit module 4 are arranged adjacent to each other, and the heat dissipation module 3 and the indoor unit module 4 share the air inlet. The heat dissipation module 3 includes a condenser 32 and a heat dissipation fan 31, and the indoor unit module 4 includes an evaporator 42 and an indoor unit fan 41. The compressor 2, the condenser 32 and the evaporator 42 are connected through a refrigerant pipeline 5. The compressor 2, the condenser 32 and the evaporator 42 constitute an air conditioning component, and its specific working principle is the same as that of the existing air conditioner, which will not be described in detail here. An indoor unit air outlet 43 is opened at the upper part of the air inlet body 13, and the air outlet of the indoor unit fan 41 is fluidly connected to the indoor unit air outlet 43 through an air guide channel 44. When working in the cooling mode, cold air is blown out from the indoor unit air outlet 43 to improve the user's cooking experience.

[0051] The heat dissipation fan 31 of this embodiment is a centrifugal fan, and the central axis of the impeller of the heat dissipation fan 31 is parallel to the central axis of the impeller of the range hood fan 11. A vent 115 is provided on the volute ring wall 114 of the range hood fan 11. The heat dissipation fan 31 is arranged above the range hood fan 11, and the air outlet of the heat dissipation fan 31 faces downward and toward the vent 115. The air outlet of the heat dissipation fan 31 is fluidically connected with the vent 115. In this embodiment, the vent 115 is provided at the front section of the volute ring wall 114 and close to the root of the volute tongue 113. When there is back pressure at the range hood outlet, the wind in the volute 111 will not overflow from the vent 115. The position of the vent 115 should be as close to the front section of the ring wall as possible, and the closer to the volute tongue 113, the better.

[0052] In this embodiment, the vent 115 is opened at the front 1 / 4 position of the volute ring wall 114, and an air guide valve 6 is installed at the vent 115. The air guide valve 6 is used to guide the hot air blown out by the heat dissipation fan 31 into the interior of the volute 111. Specifically, the air guide valve 6 includes a mounting portion and an air guide portion. The mounting portion is mounted on the front edge of the vent 115, and the air guide portion is a flat plate and extends from front to back. The range of the angle A between the tangent line of the volute ring wall 114 at the root of the air guide valve 6 and the air guide portion of the air guide valve 6 is 10°≤A≤50°. The range of the length B of the air guide portion of the air guide valve 6 is 10mm≤B≤60mm. The B value is related to the position of the vent 115 of the volute ring wall 114. The closer the position of the vent 115 is to the volute tongue 113, the smaller the B value can be relatively. On the contrary, the B value increases. In addition, in order to obtain the best air guiding performance of the air guide valve, the A value and the B value have a certain correlation. The larger the A value, the smaller the B value. Conversely, the smaller the A value, the larger the B value.

[0053] The vertical distance between the edge of the air guide valve 6 closest to the impeller 112 and the outer peripheral surface of the impeller 112 is L1, and the vertical distance between the edge of the volute tongue 113 closest to the impeller 112 and the outer peripheral surface of the impeller 112 is L2, then L1 and L2 need to satisfy 0≤L1-L2≤6mm, preferably L1=L2.

[0054] An inner pressure sensor 81 is installed on the inner wall of the air guide valve 6 facing the inside of the volute 111, and an outer pressure sensor 82 is installed on the outer wall of the air guide valve 6 facing the outside of the volute 111. The inner pressure sensor 81 is used to detect the pressure F1 of the air guide valve 6, and the outer pressure sensor is used to detect the pressure F2 on the outside of the air guide valve 6.

[0055] When the range hood is working, the pressure value F1 read by the inner pressure sensor 81 and the pressure value F2 read by the outer pressure sensor 82 are converted into electrical signals and transmitted to the controller, and the controller then outputs instructions to the motor 7. The motor 7 drives the air guide valve 6 to rotate according to the received instructions, and adjusts the rotation angle of the air guide valve 6 so that the air guide valve 6 is always in the optimal angle position. The inner and outer pressure difference ΔF=F1-F2, when L1=L2, the end of the air guide part of the air guide valve 6 and the lowest point of the volute tongue are on the concentric circle, at this time ΔF=Fn, the pressure difference ΔF value reaches the maximum, which is most conducive to the air intake of the heat dissipation fan 31. When ΔF=0, the air guide valve 6 is in a critical position, the inner and outer pressures of the vent 115 are balanced, and the vent 115 does not enter the air.

[0056] like Figure 5 As shown, the control method of the refrigeration type range hood of this embodiment specifically includes the following steps:

[0057] S1, start;

[0058] S2. If the user turns on the range hood, proceed to steps S4 to S10;

[0059] S3. If the user only turns on the cooling function, proceed to steps S11 to S16;

[0060] S4, the range fumes exhaust fan starts to operate;

[0061] S5, determining whether the user turns on the cooling function;

[0062] If it is on, go to step S6;

[0063] If not, return to step S4;

[0064] S6, the motor 7 drives the air guide valve 6 to open, the inner pressure sensor 81 detects the pressure F1, the outer pressure sensor 82 detects the pressure F2, and the inner and outer pressure difference ΔF = F1 - F2;

[0065] S7, judging whether ΔF is a maximum value;

[0066] If yes, proceed to step S8;

[0067] If not, return to step S6;

[0068] S8, whether ΔF is not greater than Fn;

[0069] If yes, proceed to step S9;

[0070] If not, the motor 7 drives the air guide valve 6 to rotate, and the process returns to step S8;

[0071] S9, the motor 7 stops working, and the air guide valve 6 maintains the existing state;

[0072] S10: If the user adjusts the range hood position, the process returns to step S7;

[0073] If the user turns off the cooling function, the air guide valve 6 is closed and the process ends.

[0074] S11, the motor 7 drives the air guide valve 6 to open, the range hood is set to low gear by default, the inner pressure sensor 81 detects the pressure F1, the outer pressure sensor 82 detects the pressure F2, and the inner and outer pressure difference ΔF = F1 - F2;

[0075] S12, judging whether ΔF is a maximum value;

[0076] If yes, proceed to step S13;

[0077] If not, return to step S11;

[0078] S13, whether ΔF is not greater than Fn;

[0079] If yes, proceed to step S14;

[0080] If not, the motor 7 drives the air guide valve 6 to rotate, and the process returns to step S13;

[0081] S14, the motor 7 stops working, and the air guide valve 6 maintains the existing state;

[0082] S15, the user turns off the cooling function;

[0083] S16, the air guide valve 6 is closed, and the process ends.

[0084] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0085] The "fluid connection" referred to in the present invention refers to the spatial position relationship between two parts or parts, which are collectively referred to as the first part and the second part respectively below, that is, fluid gas, liquid or a mixture of the two can flow from the first part along the flow path or / and be transported to the second part. The first part and the second part can be directly connected, or the first part and the second part can be indirectly connected through at least one third party. The third party can be a fluid channel such as a pipe, channel, duct, guide member, hole, groove, etc., or it can be a chamber allowing fluid to flow through, or a combination of the above.

Claims

1. A refrigeration type range hood, comprising a range hood module (1), a compressor (2), a heat dissipation module (3) and an indoor module (4), wherein the range hood module (1) comprises a range hood fan (11), the compressor (2), the heat dissipation module (3) and the indoor module (4) are connected via a refrigerant pipeline (5), the heat dissipation module (3) and the indoor module (4) are arranged outside the range hood fan (11), the range hood fan (11) comprises a volute (111) and an impeller (112) installed inside the volute (111), the heat dissipation module (3) has a heat dissipation fan (31), and is characterized in that: The volute ring wall (114) of the fume extractor fan (11) is provided with a vent (115), and an air guide valve (6) is installed at the vent (115) for guiding hot air blown out by the heat dissipation fan (31) into the interior of the volute (111). An inner pressure sensor (81) is installed on the inner wall of the air guide valve (6) facing the interior of the volute (111), and an outer pressure sensor (82) is installed on the outer wall of the air guide valve (6) facing the exterior of the volute (111). The fan also includes a controller and a motor (7) for driving the air guide valve (6) to rotate. The controller can receive output signals of the inner pressure sensor (81) and the outer pressure sensor (82), and control the motor (7) according to the received signals, thereby adjusting the rotation angle of the air guide valve (6).

2. The refrigeration type range hood according to claim 1, characterized in that: The air guiding portion of the air guiding valve (6) is a flat plate, and the angle A between the tangent line of the volute ring wall (114) at the root of the air guiding valve (6) and the air guiding valve (6) is in the range of 10°≤A≤50°.

3. The refrigeration type range hood according to claim 2, characterized in that: The length B of the air guide valve (6) is in the range of 10 mm ≤ B ≤ 60 mm.

4. The refrigeration type range hood according to claim 3, characterized in that: A volute tongue (113) is mounted on the volute ring wall (114); a vertical distance between an edge of the air guide valve (6) closest to the impeller (112) and an outer peripheral surface of the impeller (112) is L1; a vertical distance between an edge of the volute tongue (113) closest to the impeller (112) and an outer peripheral surface of the impeller (112) is L2, and the relationship 0≤L1-L2≤6mm is satisfied.

5. The refrigeration type range hood according to claim 4, characterized in that: The ventilation opening (115) is provided at the front section of the volute ring wall (114); the air guide valve (6) is installed at the front edge of the ventilation opening (115); and the length of the air guide valve (6) changes with the position of the ventilation opening (115); the ventilation opening (115) is relatively close to the root of the volute tongue (113); the shorter the air guide valve (6) is, the farther the ventilation opening (115) is from the volute tongue (113), and the longer the length of the air guide valve (6) is.

6. The refrigeration type range hood according to claim 1, characterized in that: The oil fume suction fan (11) and the heat dissipation fan (31) are both centrifugal fans, and the central axis of the impeller of the oil fume suction fan (11) and the central axis of the impeller of the heat dissipation fan (31) are parallel to each other.

7. The refrigeration type range hood according to any one of claims 1 to 6, characterized in that: The oil fume extraction module (1) comprises an upper box body (12) and an air inlet body (13) arranged at the bottom of the upper box body (12); the oil fume extraction fan (11) is installed inside the upper box body (12); and the air inlet body (13) is provided with an air inlet port connected to the air inlet port of the oil fume extraction fan (11).

8. The refrigeration type range hood according to claim 7, characterized in that: The heat dissipation module (3) is arranged on the top of the upper box body (12), the heat dissipation fan (31) is arranged above the range fumes exhaust fan (11), and the air outlet of the heat dissipation fan (31) faces downward and toward the ventilation port (115).

9. The refrigeration type range hood according to claim 8, characterized in that: The heat dissipation module (3) comprises a condenser (32) and the heat dissipation fan (31), and the indoor unit module (4) comprises an evaporator (42) and an indoor unit fan (41). The heat dissipation module (3) and the indoor unit module (4) are arranged adjacent to each other.

10. A control method for a refrigeration range hood, characterized in that: The control method is applied to the refrigeration range hood according to any one of claims 1 to 9, and the control method comprises the following steps: S1, start; S2. If the user turns on the range hood, proceed to steps S4 to S10; S3. If the user only turns on the cooling function, proceed to steps S11 to S16; S4, the range fumes exhaust fan starts to operate; S5, determining whether the user turns on the cooling function; If it is on, go to step S6; If not, return to step S4; S6, the motor (7) drives the air guide valve (6) to open, the inner pressure sensor (81) detects the pressure F1, the outer pressure sensor (82) detects the pressure F2, and the inner and outer pressure difference ΔF = F1 - F2; S7, judging whether ΔF is a maximum value; If yes, proceed to step S8; If not, return to step S6; S8, whether ΔF is not greater than Fn; If yes, proceed to step S9; If not, the motor (7) drives the air guide valve (6) to rotate, and the process returns to step S8; S9, the motor (7) stops working, and the air guide valve (6) remains in the existing state; S10: If the user adjusts the range hood position, the process returns to step S7; If the user turns off the cooling function, the air guide valve (6) is closed and the process ends. S11, the motor (7) drives the air guide valve (6) to open, the range hood is set to a low gear by default, the inner pressure sensor (81) detects a pressure F1, the outer pressure sensor (82) detects a pressure F2, and the inner and outer pressure difference ΔF = F1 - F2; S12, judging whether ΔF is a maximum value; If yes, proceed to step S13; If not, return to step S11; S13, whether ΔF is not greater than Fn; If yes, proceed to step S14; If not, the motor (7) drives the air guide valve (6) to rotate, and the process returns to step S13; S14, the motor (7) stops working, and the air guide valve (6) remains in the existing state; S15, the user turns off the cooling function; S16, the air guide valve (6) is closed, and the process ends.

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