A control method for a refrigerated range hood and the refrigerated range hood itself.

Abstract

This invention relates to a control method for a refrigerated range hood and the refrigerated range hood itself. The control method includes: when the refrigeration system is in swing mode, if the difference between the current ambient temperature and the previous ambient temperature is greater than a preset ambient temperature threshold, and the difference between the current angle of the user's head relative to the upper edge of the cold air vent and the previous angle of the user's head relative to the upper edge of the cold air vent is less than or equal to a preset angle threshold, then the swing angle range of the grille assembly is determined based on the flow rate of the range hood fan; the critical wind speed of the cold air vent is determined based on the ambient temperature and the cold air setting; finally, with the angle of the user's head relative to the upper edge of the cold air vent as the center, the wind speed of the cold air vent and the swing speed of the grille assembly at each angle are generated, and the generated wind speed of the cold air vent and the swing speed of the grille assembly at each angle are used as the operating conditions of the refrigeration system at the current cold air setting. This method can improve user comfort and avoid the mutual interference of hot and cold air.

Description

Technical Field

[0001] This invention relates to the field of range hood technology, and in particular to a control method for a refrigerated range hood and a refrigerated range hood. Background Technology

[0002] To improve the cooking environment, existing technologies have incorporated refrigeration systems into range hoods. For example, Chinese utility model patent ZL202220922936.X (authorization announcement number CN217274392U) discloses a side-suction range hood with a refrigeration function. This range hood has an air inlet formed by the upper opening of the mounting frame and an air outlet on the front face of the mounting frame. Since the refrigeration device conducts external air through the air inlet, the external air enters the refrigeration device through the air inlet, is cooled into cold air, and is discharged into the room from the air outlet, thereby achieving the purpose of cooling the kitchen temperature.

[0003] In existing refrigerated range hoods, the cold air inlet is usually located above the air inlet. Therefore, these refrigerated range hoods have the following limitations: First, users are generally located in front of the stove while cooking, and the cold air generated by the refrigerator will directly hit their faces, significantly reducing user comfort and increasing the risk of catching a cold. Second, when the cold air inlet is close to the air inlet, they can interfere with each other when working simultaneously, resulting in poor cooling performance and a reduced user experience. However, if the cold air inlet is far from the air inlet, the user will experience a weaker cooling sensation.

[0004] Therefore, further improvements to existing technologies are needed. Summary of the Invention

[0005] The first technical problem to be solved by the present invention is to provide a control method for a refrigerated range hood that can improve user comfort and avoid mutual interference between the cold air inlet and the oil fume inlet, in contrast to the above-mentioned prior art.

[0006] The second technical problem to be solved by the present invention is to provide a refrigerated range hood that applies the above-mentioned control method.

[0007] The technical solution adopted by the present invention to solve the first technical problem mentioned above is: a control method for a refrigerated range hood, the refrigerated range hood comprising:

[0008] The casing has an oil fume inlet and a cold air outlet;

[0009] The fume extractor is housed inside the casing, and its air inlet is in fluid communication with the fume inlet.

[0010] The refrigeration system includes a cooler fan housed in a casing and a grille assembly constrained to the air vent in a swingable manner, the air outlet of the cooler fan being in fluid communication with the air vent.

[0011] The characteristic feature is that the control method of the refrigerated range hood includes the following steps:

[0012] S1. Activate the cooling mode;

[0013] S2. Determine if the current cooling system is in swing mode. If yes, proceed to S3; otherwise, proceed to S8.

[0014] S3. Obtain the current ambient temperature t1 and the angle p1 of the human head relative to the upper edge of the cold air vent;

[0015] S4. Determine whether the following conditions are met: the difference between the current ambient temperature t1 and the previous ambient temperature is less than or equal to the preset ambient temperature threshold, and the difference between the current angle p1 of the human head relative to the upper edge of the cold air vent and the previous angle of the human head relative to the upper edge of the cold air vent is less than or equal to the preset angle threshold; if yes, proceed to S9; if no, proceed to S5.

[0016] S5. Confirm the current flow rate of the range hood fan, and determine the swing angle range a1 of the grille assembly based on the current flow rate of the range hood fan.

[0017] S6. Determine the critical wind speed v1 of the air vent based on the ambient temperature and the air conditioning setting. The temperature difference felt by the human head is most comfortable when the air vent is at this critical wind speed v1.

[0018] S7. Generate the wind speed of the cold air vent and the swing speed of the grille assembly at each angle, and use the generated wind speed of the cold air vent and the swing speed of the grille assembly at each angle as the operating conditions of the refrigeration system at the current cold air setting.

[0019] S8. The refrigeration system starts working according to the set cooling speed and then stops.

[0020] S9. The refrigeration system starts working according to the operating conditions of the previous cooling setting, and then ends.

[0021] To adjust the airflow according to different user habits and make it more scientific and intelligent, the formula for calculating the wind speed v3 of the cold air vent at various angles in S7 is as follows:

[0022]

[0023] Where k1 is the preset first proportional coefficient, k1>0; v2 is the critical wind speed of the air vent determined based on the ambient temperature and air vent setting in non-swing mode; x is the angle between the human head and the upper edge of the air vent at various angles.

[0024] To correlate the oscillation speed of the grille with the fume inlet and prevent hot and cold air from interfering with each other, the oscillation speed b1 of the grille assembly in S7 is calculated using the following formula:

[0025]

[0026] Where b2 is the preset initial swing speed of the grid assembly, k2 is the preset second proportional coefficient, and k3 is the preset third proportional coefficient. b2, k2 and k3 are all greater than 0 and satisfy k3*p1≤min(a1-p1,p1).

[0027] To enable the grille assembly to swing, the housing is provided with a drive mechanism for driving the grille assembly to swing, the drive mechanism including a motor connected to the grille assembly.

[0028] The technical solution adopted by the present invention to solve the second technical problem mentioned above is: a refrigerated range hood, characterized in that: a control method for a refrigerated range hood as described above is applied.

[0029] Preferably, the front side of the housing has a first panel that is gradually inclined downward from front to back and a second panel that extends vertically. The bottom of the second panel is connected to the top of the first panel. The fume inlet is opened on the first panel and the cold air vent is opened on the second panel.

[0030] In the above solution, the refrigerated range hood also includes a baffle plate that is rotatably constrained in front of the fume inlet to open or close the fume inlet.

[0031] To improve the interference between the cold air inlet and the fume inlet and enhance the fume extraction effect, when the smoke baffle is fully open, the point where the longitudinal section of the smoke baffle intersects with the first panel is marked as point D, and the point at the free end of the longitudinal section of the smoke baffle is marked as point F. That is, the longitudinal section of the smoke baffle forms a straight line DF. The intersection of the human body and the straight line DF is marked as point B. Furthermore, the air outlet point of the cold air inlet is marked as E, and the point where the cold air from the cold air inlet intersects with the human body is marked as point C. That is, the direction of the cold air from the cold air inlet forms a straight line EC. The following conditions must be met:

[0032]

[0033] Where h1 is the distance between the human body and the wall where the cooling range hood is located, h2 is the shortest distance from point A on the outer edge of the stove below the cooling range hood to the straight line DF, h3 is the shortest distance from point C to the straight line DF, and h5 is the width of the fume inlet.

[0034] Preferably, the value range of h1 is: 700mm≤h1≤800mm.

[0035] To reduce the interference of the airflow above the cold air vent on the oil fume inlet, the angle formed by the straight line DF and the straight line BC is a3. Let G be a point on the extension line of the straight line BC. Point C is located between point B and point G. The angle formed by the straight line EC and the straight line CG is a2. The relationship between a2 and a3 is: a2≥a3.

[0036] Compared with the prior art, the advantages of the present invention are as follows: by putting the cooling system in swing mode, it is closer to the human comfort level, and generates the wind speed of the cold air vent and the swing speed of the grille assembly at various angles, so that the cold air vent and the oil fume inlet are interconnected and the interference between the cold air vent and the oil fume inlet is avoided; in addition, it can adjust the customized air outlet according to different user habits, which is more scientific and intelligent. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of the refrigerated range hood in an embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram illustrating the usage state of the refrigerated range hood in an embodiment of the present invention;

[0039] Figure 3 This is a schematic diagram of another usage state of the refrigerated range hood in an embodiment of the present invention;

[0040] Figure 4 This is a schematic diagram of the air outlet of the cold air vent in an embodiment of the present invention. Detailed Implementation

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

[0042] like Figures 1-2 As shown, the refrigerated range hood in this embodiment includes a housing 1, a range hood fan (not shown in the figure), and a refrigeration system disposed within the housing 1. The housing 1 has a fume inlet 11 and a cold air outlet 12; the air inlet of the range hood fan is in fluid communication with the fume inlet 11; the refrigeration system includes a cold air fan disposed within the housing 1 and a grille assembly 31 constrained in a swinging manner at the cold air outlet 12. In this embodiment, the housing 1 is provided with a drive mechanism (not shown in the figure) for driving the grille assembly 31 to swing. The drive mechanism includes a motor connected to the grille assembly 31. The air outlet of the cold air fan is in fluid communication with the cold air outlet 12. The grille assembly includes at least two grille bars 311, and adjacent grille bars 311 form an outlet 30 for airflow. The refrigeration system blows out cold air through the outlet 30. Of course, the refrigeration system also includes refrigeration structures such as compressors, condensers and evaporators. The range hood part and refrigeration system in this embodiment of the refrigerated range hood are existing technologies and will not be elaborated here. Please refer to the content disclosed in patent number ZL202222533236.4 "A Refrigerated Range Hood".

[0043] The front side of the casing 1 has a first panel 1a that slopes downwards from front to back and a second panel 1b that extends vertically. The bottom of the second panel 1b is connected to the top of the first panel 1a. The fume inlet 11 is located on the first panel 1a, and the cold air vent 12 is located on the second panel 1b. The cooling range hood also includes a baffle plate 3 that is rotatably constrained in front of the fume inlet 11 to open or close the fume inlet 11.

[0044] like Figure 2 As shown, when the smoke baffle 3 is fully open, the point where the longitudinal section of the smoke baffle 3 intersects with the first panel 1a is marked as point D, and the point at the free end of the longitudinal section of the smoke baffle 3 is marked as point F. That is, the longitudinal section of the smoke baffle 3 forms a straight line DF. The intersection of the human body 4 (corresponding to the center line of the human body 4) and the straight line DF is marked as point B. Furthermore, the air outlet point on the cold air vent 12 is marked as E, and the point where the cold air from the cold air vent 12 intersects with the human body 4 is marked as point C. That is, the direction of the cold air from the cold air vent 12 forms a straight line EC. The following conditions must be met:

[0045]

[0046] Where h1 is the distance between the human body 4 and the wall 5 where the cooling range hood is located, h2 is the shortest distance from point A on the outer edge of the stove 6 below the cooling range hood to the straight line DF, h3 is the shortest distance from point C to the straight line DF, and h5 is the width of the fume inlet 11.

[0047] The range of h1 is: 700mm≤h1≤800mm.

[0048] Furthermore, the angle formed by the line DF and the line BC is a3. Let G be a point on the extension line of the line BC. Point C is located between point B and point G. The angle formed by the line EC and the line CG is a2. The relationship between a2 and a3 is: a2≥a3.

[0049] The control method for the above-mentioned refrigerated range hood includes the following steps:

[0050] S1. Activate the cooling mode;

[0051] S2. Determine if the current cooling system is in swing mode. If yes, proceed to S3; otherwise, proceed to S8.

[0052] S3. Obtain the current ambient temperature t1 and the angle p1 of the human head relative to the upper edge of the cold air vent;

[0053] S4. Determine whether the following conditions are met: the difference between the current ambient temperature t1 and the previous ambient temperature is less than or equal to the preset ambient temperature threshold, and the difference between the current angle p1 of the human head relative to the upper edge of the cold air vent and the previous angle of the human head relative to the upper edge of the cold air vent is less than or equal to the preset angle threshold; if yes, proceed to S9; if no, proceed to S5.

[0054] S5. Confirm the current flow rate of the range hood fan, and determine the swing angle range a1 of the grille assembly based on the current flow rate of the range hood fan.

[0055] like Figure 3 As shown, the opening angle of the smoke baffle affects the lower limit position of the cold air outlet. When the opening angle of the smoke baffle is large, in order to ensure that the airflow drawn in by the range hood does not affect the airflow at the cold outlet, the two need to have a certain positional difference. Therefore, it is necessary to determine the influence range of the smoke inlet airflow based on the angle of the smoke baffle and the speed of the range hood (which determines the airflow speed at the inlet of the range hood), and thus determine the limit swing range of the grille assembly.

[0056] S6. Determine the critical wind speed v1 of the air vent based on the ambient temperature and the air conditioning setting. The temperature difference felt by the human head is most comfortable when the air vent is at this critical wind speed v1.

[0057] S7. Generate the wind speed of the cold air vent and the swing speed of the grille assembly at each angle, and use the generated wind speed of the cold air vent and the swing speed of the grille assembly at each angle as the operating conditions of the refrigeration system at the current cold air setting.

[0058] like Figure 3 and Figure 4 As shown, the maximum wind speed is defined as the distance between the air vent and the person's head. Inconsistent angles will result in different wind speed distributions. Figure 4 As shown, with the upper edge of the air vent extending along the X-axis, and the extension direction at an angle α1 to the X-axis as the Y-axis, the maximum air velocity at the air vent along the X-axis is point H. As the grille assembly oscillates, the air velocity distribution at the air vent is as follows: Figure 4 As shown in curve 10a, the oscillation speed of the grid assembly is as follows: Figure 4 As shown in curve 10b;

[0059] In this embodiment, the formula for calculating the wind speed v3 at the cold air vent at each angle is as follows:

[0060]

[0061] Where, k1 is the preset first proportional coefficient, k1>0; v2 is the critical wind speed of the air vent determined based on the ambient temperature and air vent setting in non-swing mode; x is the angle between the human head and the upper edge of the air vent at various angles.

[0062] The formula for calculating the oscillation speed b1 of the grille assembly is:

[0063]

[0064] Where b2 is the preset initial swing speed of the grid assembly, k2 is the preset second proportional coefficient, and k3 is the preset third proportional coefficient. b2, k2 and k3 are all greater than 0 and satisfy k3*p1≤min(a1-p1,p1).

[0065] S8. The refrigeration system starts working according to the set cooling speed and then stops.

[0066] S9. The refrigeration system starts working according to the operating conditions of the previous cooling setting, and then ends.

[0067] In this embodiment, the cooling range hood adopts an oscillating mode, which is closer to the human comfort level. It also generates the wind speed of the cooling fan and the oscillation speed of the grille at various angles to link the cooling air vents and the fume inlet, avoiding mutual interference between them. In addition, it can adjust the customized airflow according to different user habits, making it more scientific and intelligent.

Claims

1. A control method for a refrigerated range hood, the refrigerated range hood comprising: The casing (1) has an oil fume inlet (11) and a cold air outlet (12); A fume extractor is installed inside the casing (1), and the air inlet of the fume extractor is in fluid communication with the fume inlet (11); The refrigeration system includes a fan housed in the housing (1) and a grille assembly (31) constrained in a swingable manner at the air outlet (12), the air outlet of the fan being in fluid communication with the air outlet (12). The characteristic feature is that the control method of the refrigerated range hood includes the following steps: S1. Activate the cooling mode; S2. Determine if the current cooling system is in swing mode. If yes, proceed to S3; otherwise, proceed to S8. S3. Obtain the current ambient temperature t1 and the current angle of the human head relative to the upper edge of the cold air vent. ; S4. Determine if the following conditions are met: the difference between the current ambient temperature t1 and the previous ambient temperature is less than or equal to the preset ambient temperature threshold, and the current angle of the human head relative to the upper edge of the cold air vent. If the angle between the human head and the upper edge of the cold air vent is less than or equal to the preset angle threshold, proceed to S9; otherwise, proceed to S5. S5. Confirm the current flow rate of the range hood fan, and determine the grille assembly based on the current flow rate of the range hood fan. The swing angle range of the component ; S6. Determine the critical airflow speed of the air vent based on the ambient temperature and airflow setting. The cold air vent is at this critical wind speed The temperature difference felt by the head is the most comfortable. S7. Generate the air velocity of the cold air outlet and the swing speed of the grille assembly at each swing angle, and use the air velocity of the cold air outlet and the swing speed of the grille assembly at each swing angle as the operating conditions of the refrigeration system at the current cold air setting. The airflow speed at the cold air inlet of the grille assembly in S7 at a certain swing angle. The calculation formula is: ； Where k1 is a preset first proportional coefficient, k1>0; The critical wind speed of the air vent is determined based on the ambient temperature and air cooling setting in non-swing mode. The angle between the human head and the upper edge of the air vent when the grille assembly swings at a certain angle. The formula for calculating the swing speed b1 of the grille assembly in S7 is as follows: ； in, Let b2 be the preset initial swing speed of the grid assembly, k2 be the preset second proportional coefficient, k3 be the preset third proportional coefficient, b2, k2, and k3 are all greater than 0, and satisfy k 3* ≤ ; S8. The refrigeration system starts working according to the set cooling speed and then stops. S9. The refrigeration system starts working according to the operating conditions of the previous cooling setting, and then ends.

2. The control method according to claim 1, characterized in that: The housing (1) is provided with a drive mechanism for driving the grille assembly (31) to swing, the drive mechanism including a motor connected to the grille assembly (31) for driving.

3. A refrigerated range hood, characterized in that: The application includes the control method for a refrigerated range hood as described in claim 1 or 2 above.

4. The refrigerated range hood according to claim 3, characterized in that: The front side of the housing (1) has a first panel (1a) that is gradually inclined downward from front to back and a second panel (1b) that extends vertically. The bottom of the second panel (1b) is connected to the top of the first panel (1a). The fume inlet (11) is opened on the first panel (1a) and the cold air vent (12) is opened on the second panel (1b).

5. The refrigerated range hood according to claim 4, characterized in that: The refrigerated range hood also includes a baffle plate (3) that is rotatably constrained in front of the fume inlet (11) to open or close the fume inlet (11).

6. The refrigerated range hood according to claim 5, characterized in that: When the smoke baffle is fully open, the point where the longitudinal section of the smoke baffle intersects with the first panel is marked as point D, and the point at the free end of the longitudinal section of the smoke baffle is marked as point F. That is, the longitudinal section of the smoke baffle forms a straight line DF. The intersection of the human body and the straight line DF is marked as point B. Furthermore, the air outlet point on the cold air vent is marked as E, and the point where the cold air from the cold air vent intersects with the human body is marked as point C. That is, the direction of the cold air from the cold air vent forms a straight line EC. The following conditions must be met: ； Where h1 is the distance between the human body and the wall where the cooling range hood is located, h2 is the shortest distance from point A on the outer edge of the stove below the cooling range hood to the straight line DF, h3 is the shortest distance from point C to the straight line DF, and h5 is the width of the fume inlet.

7. The refrigerated range hood according to claim 6, characterized in that: The value range of h1 is: 700mm≤h1≤800mm.

8. The refrigerated range hood according to claim 6, characterized in that: The angle formed by the line DF and the line BC is a3. Let G be a point on the extension line of the line BC. Point C is located between point B and point G. The angle formed by the line EC and the line CG is a2. The relationship between a2 and a3 is: a2≥a3.

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