A range hood suitable for extremely cold regions and a control method thereof

Abstract

The application provides a range hood suitable for extremely cold areas and a control method thereof, the range hood comprising a smoke collecting hood and a box body connected with the smoke collecting hood; a wind cabinet is arranged in the box body, the wind cabinet is provided with a first air outlet, the first air outlet is provided with a first valve plate for closing and opening the first air outlet; the first air outlet is in communication with an internal circulation air duct, the internal circulation air duct is provided with a second air outlet at the end, the second air outlet is provided with a second valve plate for closing and opening the second air outlet, and a filter screen is arranged in the internal circulation air duct. The range hood suitable for extremely cold areas and the control method thereof provided by the application can start the internal circulation mode when the window needs to be closed due to low outdoor temperature, so that the negative pressure in the room is prevented, and the oil fume cannot be removed and the odor of the sewer is removed.

Description

Technical Field

[0001] This invention relates to the field of kitchen appliance technology, and in particular to a range hood and its control method suitable for extremely cold regions. Background Technology

[0002] In extremely cold regions, such as Northeast my country, the outdoor perceived temperature in winter is mostly below -10℃, and in extreme cases, it can even drop to -30℃. In such conditions, doors and windows must be kept tightly closed to prevent hypothermia. However, keeping doors and windows closed can cause negative pressure indoors when using a range hood for cooking, as there is no outside air intake. This prevents the removal of cooking fumes and may even draw out odors from the sewers, leading to user complaints.

[0003] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Summary of the Invention

[0004] The purpose of this invention is to provide a range hood suitable for extremely cold regions. When the outdoor temperature is low and the windows need to be closed, the internal circulation mode can be activated to prevent the indoor air from being negatively pressurized, which would prevent the fumes from being drawn away and to remove the odors from the sewer.

[0005] Another objective of this invention is to provide a control method for the above-mentioned range hood suitable for extremely cold regions. When the outdoor temperature is low and the windows need to be closed, the internal circulation mode can be activated to prevent the indoor air from being negatively pressurized, which would prevent the fumes from being drawn away and to remove the odors from the sewer.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A range hood suitable for extremely cold regions includes a smoke collection hood and a housing connected to the smoke collection hood; the housing is equipped with a fan cabinet, the fan cabinet has a first air outlet, the first air outlet has a first valve plate for closing and opening the first air outlet; the first air outlet is also connected to an internal circulation duct, the end of the internal circulation duct has a second air outlet, the second air outlet has a second valve plate for closing and opening the second air outlet, and a filter screen is provided inside the internal circulation duct.

[0007] According to one embodiment of the present invention, the first valve plate is connected to the first drive mechanism, the second valve plate is connected to the second drive mechanism, and both the first drive mechanism and the second drive mechanism are connected to the control system.

[0008] According to one embodiment of the present invention, a CO sensor is provided in the second air outlet.

[0009] According to one embodiment of the present invention, an alarm is provided on the outer wall of the smoke collection hood.

[0010] According to one embodiment of the present invention, the housing is provided with an external exhaust pipe corresponding to the first air outlet, and the housing is provided with an internal exhaust outlet corresponding to the second air outlet; And / or, the filter screen is inserted into the interior of the internal circulation duct along the radial direction of the internal circulation duct; the housing is provided with a cover plate corresponding to the filter screen.

[0011] The present invention also provides a control method for the above-mentioned range hood suitable for extremely cold regions, comprising the following steps: After the range hood is started, the current outdoor ambient temperature is obtained. When the outdoor ambient temperature is greater than the set temperature, the first valve plate is controlled to open the first air outlet, and the second valve plate is controlled to close the second air outlet, thus starting the exhaust mode. When the outdoor ambient temperature is less than or equal to the set temperature, the first valve plate is controlled to close the first air outlet, and the second valve plate is controlled to open the second air outlet to start the internal circulation mode.

[0012] According to one embodiment of the present invention, the air volume of the blower has a normal setting and a gentle setting, wherein the air velocity of the gentle setting is lower than that of the normal setting; in the external exhaust mode, the air volume of the blower is controlled at the normal setting; in the internal circulation mode, the air volume of the blower is controlled at the gentle setting.

[0013] According to one embodiment of the present invention, before activating the external exhaust mode, the user confirms whether to activate the external exhaust mode; before activating the internal circulation mode, the user sequentially confirms whether to activate the internal circulation mode, whether to use electric heating for cooking, and whether the external window is completely closed.

[0014] According to one embodiment of the present invention, when the internal circulation mode is started, the CO concentration in the indoor air is monitored in real time by a CO sensor at the second air outlet, and when it exceeds a set threshold, the external exhaust mode is started.

[0015] According to one embodiment of the present invention, when the CO sensor detects that the indoor air CO concentration exceeds the set threshold, it triggers an alarm.

[0016] According to one embodiment of the present invention, the range hood is provided with a control system, the control system being connected to the first valve plate and the second valve plate; the control system is communicatively connected to a wireless terminal, and obtains the current outdoor ambient temperature through the wireless terminal.

[0017] Compared with the prior art, the advantages and beneficial effects of the embodiments of the present invention are as follows: The range hood and its control method for extremely cold regions provided in this invention allow users to open windows and control the first valve plate to open the first air outlet when the outdoor ambient temperature is higher than the set temperature. Simultaneously, the second valve plate closes the second air outlet, activating the external exhaust mode. The fumes enter the fume collection hood, flow through the air handling unit, and are directly exhausted outdoors through the first air outlet. Outdoor air can also be introduced into the room to prevent negative pressure from preventing the fumes from being removed and to remove sewer odors. When the outdoor ambient temperature is lower than or equal to the set temperature, the user closes the windows, controls the first valve plate to close the first air outlet, and simultaneously controls the second valve plate to open the second air outlet, activating the internal circulation mode. After passing through the air handling unit, the fumes, due to the closed first air outlet, flow back into the room through the second air outlet along the internal circulation duct. This also prevents negative pressure from preventing the fumes from being removed and to remove sewer odors. In addition, the internal circulation duct is equipped with a filter to remove grease and oil from the fumes, allowing clean air to be discharged from the second air outlet. Finally, because the internal circulation mode creates an airflow field that is more conducive to smoke extraction, it achieves the same smoke extraction effect as the external exhaust mode with a smaller airflow, thus enabling lower noise levels with a smaller airflow. Attached Figure Description

[0018] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. Wherein: Figure 1 This is a schematic diagram of the structure of a range hood suitable for extremely cold regions, provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of the internal structure of a range hood suitable for extremely cold regions, provided in an embodiment of the present invention. Figure 3 This is a schematic diagram of the structure of a range hood suitable for extremely cold regions in external exhaust mode, provided by an embodiment of the present invention. Figure 4 This is a schematic diagram of the internal circulation mode of a range hood suitable for extremely cold regions, provided by an embodiment of the present invention. Figure 5 This is a schematic diagram of the working state of a range hood suitable for extremely cold regions in internal circulation mode, provided by an embodiment of the present invention. Figure 6 A schematic diagram of the installation structure of a range hood suitable for extremely cold regions provided in an embodiment of the present invention; Figure 7 This is a flowchart illustrating a control method for a range hood suitable for extremely cold regions, provided in an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures: 1. Smoke hood; 11. Control interface; 2. Housing; 21. External exhaust pipe; 22. Internal exhaust vent; 23. Cover plate; 3. Air handling unit; 31. First air outlet; 32. First valve plate; 4. Internal circulation air duct; 41. Second air outlet; 42. Second valve plate; 5. Filter screen; 6. CO sensor; 7. Alarm. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation and not by way of limitation. Indeed, those skilled in the art will recognize that modifications and variations can be made to the invention without departing from its scope or spirit. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the invention encompass such modifications and variations falling within the scope of the appended claims and their equivalents.

[0021] In the description of this invention, the terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects. The terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. The terms "connected," "linked," and "set up" used in this invention should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a direct connection or an indirect connection through intermediate components; a wired connection, a radio connection, or a wireless communication signal connection. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0022] like Figure 1 , Figure 2As shown, this embodiment of the invention provides a range hood suitable for extremely cold regions, including a smoke collection hood 1 and a housing 2 connected to the smoke collection hood 1. The housing 2 houses a fan unit 3, which has a first air outlet 31. The first air outlet 31 has a first valve plate 32 for closing and opening the first air outlet 31. The first air outlet 31 is also connected to an internal circulation duct 4. The end of the internal circulation duct 4 has a second air outlet 41, which has a second valve plate 42 for closing and opening the second air outlet 41. A filter screen 5 is installed inside the internal circulation duct 4.

[0023] like Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, the range hood for extremely cold regions provided in this embodiment of the invention allows the user to open a window when the outdoor ambient temperature is higher than the set temperature (e.g., -10℃). At this time, the user can control the first valve plate 32 to open the first air outlet 31 and simultaneously control the second valve plate 42 to close the second air outlet 41, thus activating the exhaust mode. After the fumes enter the fume hood 1, they flow through the air handling unit 3 and are directly discharged outdoors from the first air outlet 31 (connected to the exhaust pipe leading to the outside). At the same time, outdoor air can be replenished into the room to prevent the room from being negatively pressurized, which would prevent the fumes from being extracted and to remove odors from the sewer. When the outdoor ambient temperature is less than or equal to the set temperature (e.g., -10℃), the user closes the window, controls the first valve plate 32 to close the first air outlet 31, and simultaneously controls the second valve plate 42 to open the second air outlet 41, activating the internal circulation mode. After passing through the air handling unit 3, the indoor fumes, due to the closed first air outlet 31, will flow back into the room through the second air outlet 41 along the internal circulation duct 4. This also prevents negative pressure indoors, which could prevent the fumes from being removed and remove sewer odors. Furthermore, the internal circulation duct 4 is equipped with a filter 5 to filter grease from the fumes, allowing clean air to be discharged from the second air outlet 41. Finally, because the internal circulation mode creates an airflow field, which is more conducive to smoke extraction, the same smoke extraction effect as the external exhaust mode can be achieved with a smaller airflow in internal circulation mode, thus achieving lower noise levels with a smaller airflow.

[0024] To control the opening and closing actions of the first valve plate 32 and the second valve plate 42, in one embodiment of the present invention, the first valve plate 32 is connected to a first drive mechanism (not shown in the figure), and the second valve plate 42 is connected to a second drive mechanism (not shown in the figure). Both the first and second drive mechanisms are connected to a control system. For example, the first valve plate 32 is connected to the first air outlet 31 via a rotating shaft and can rotate. When the first valve plate 32 rotates to be radially parallel to the first air outlet 31, the first air outlet 31 is closed. As the first valve plate 32 rotates to be axially parallel to the first air outlet 31, the first air outlet 31 is gradually opened. The first drive mechanism can be a motor, and the output shaft of the motor is connected to the rotating shaft. Further, there can be two first valve plates 32, arranged opposite each other. When they approach each other, the first air outlet 31 is gradually closed, and when they move away from each other, the first air outlet 31 is gradually opened. The second valve plate 42 and the second drive mechanism can adopt the same structure as the first valve plate 32 and the first drive mechanism.

[0025] like Figure 1 , Figure 2 As shown, in recirculation mode, due to the lack of fresh air supply, harmful gases such as CO will be generated when the user mistakenly uses chemical fuels such as natural gas / coal gas. Therefore, in one embodiment of the present invention, a CO sensor 6 is provided inside the second air outlet 41. In recirculation mode, the CO sensor 6 monitors the CO concentration in the air in real time. When the CO concentration exceeds the set safety threshold, the range hood will be forcibly switched to exhaust mode. In addition, to remind the user that the CO concentration has exceeded the set safety threshold, an alarm 7, such as a buzzer, is provided on the outer wall of the smoke hood 1 to issue a warning to the user.

[0026] like Figure 1 , Figure 6 As shown, in one embodiment of the present invention, the housing 2 is provided with an external exhaust pipe 21 corresponding to the first air outlet 31, and the external exhaust pipe 21 leads directly to the outside. The housing 2 is provided with an internal exhaust outlet 22 corresponding to the second air outlet 41, and the internal exhaust outlet 22 faces the interior.

[0027] like Figures 2-4 As shown, in one embodiment of the present invention, the filter screen 5 is inserted radially into the inner circulation duct 4, forming a drawer-type structure to facilitate replacement of the filter screen 5. For ease of operation, the housing 2 is provided with a cover plate 23 corresponding to the filter screen 5, which can be opened to expose the internal filter screen 5.

[0028] like Figure 1 , Figure 6 As shown, in one embodiment of the present invention, the smoke hood 1 has an operation interface 11 on the front to guide the user in selecting the smoke exhaust mode and to serve as the input for user confirmation.

[0029] like Figure 7 As shown, the present invention also provides a control method for the above-mentioned range hood suitable for extremely cold regions, comprising the following steps: After the range hood is started, the current outdoor ambient temperature is obtained. When the outdoor ambient temperature is greater than the set temperature (e.g., -10℃), the first valve plate 32 is controlled to open the first air outlet 31, and the second valve plate 42 is controlled to close the second air outlet 41, thus starting the exhaust mode. When the outdoor ambient temperature is less than or equal to the set temperature (e.g., -10℃), the first valve plate 32 is controlled to close the first air outlet 31, and the second valve plate 42 is controlled to open the second air outlet 41 to start the internal circulation mode.

[0030] In one embodiment of the present invention, the range hood is equipped with a control system, which is connected to the first valve plate 32 and the second valve plate 42 to control the opening and closing of the first valve plate 32 and the second valve plate 42. The control system is communicatively connected to a wireless terminal (e.g., a mobile phone) and obtains the current outdoor ambient temperature through the wireless terminal, for example, by obtaining outdoor ambient temperature data through a mobile phone APP.

[0031] In one embodiment of the present invention, the air volume of the fan 3 has a normal setting and a gentle setting, with the airflow speed in the gentle setting being lower than that in the normal setting. In the exhaust mode, the airflow of the fan 3 is controlled at the normal setting, and in the recirculation mode, the airflow of the fan 3 is controlled at the gentle setting. Since an air circulation field can be formed in the recirculation mode, which is more conducive to smoke extraction, the same smoke extraction effect as the exhaust mode can be achieved with a smaller airflow in the recirculation mode. Therefore, lower noise performance can be achieved with a smaller airflow.

[0032] In one embodiment of the present invention, when the internal circulation mode is activated, the CO sensor 6 at the second air outlet 41 monitors the indoor air CO concentration in real time. When the concentration exceeds a set threshold, the external exhaust mode is activated. Further, when the CO sensor 6 detects that the indoor air CO concentration exceeds the set threshold, an alarm 7 (e.g., a buzzer) is triggered, and the first air outlet 31 is immediately opened to activate the external exhaust mode 5 seconds after the alarm.

[0033] In one embodiment of the present invention, before activating the external exhaust mode, the user confirms whether to activate the external exhaust mode, for example, through the operation interface 11 on the fume hood 1. Before activating the internal circulation mode, the user sequentially confirms whether to activate the internal circulation mode, whether to use electric heating for cooking, and whether the external window is completely closed, for example, through the operation interface 11 on the fume hood 1. The specific workflow is as follows: When the range hood is started, the current outdoor ambient temperature is obtained. According to the temperature range requirements, the user confirms and selects the corresponding working mode, internal circulation mode or external exhaust mode. When the user selects the external exhaust mode, the range hood opens the first valve plate 32, causing the first air outlet 31 to open. The fan in the air cabinet 3 operates at the normal airflow rate and starts working until the user triggers the power off button. At this time, the first air outlet 31 is confirmed to be open, and the range hood is turned off. When the user selects the internal circulation mode, the range hood will ask the user to confirm whether to "use electric heating for cooking". If "yes" is selected, the user will be further asked to confirm whether "the outer window is completely closed". If "yes" is selected, the range hood will close the first air outlet 31, and the fan of the air handling unit 3 will operate at the "gentle" air volume until the user triggers the power off button. At this time, the first air outlet 31 will be confirmed to be open and the range hood will be turned off.

[0034] Furthermore, in the external exhaust mode, a confirmation step is included. When the user selects "No" for the first time while waiting for confirmation of "External Exhaust Mode," the system will redirect to the user's confirmation screen for external exhaust mode. If "No" is selected a second time, the system will redirect to the internal circulation mode confirmation screen and execute subsequent internal circulation mode commands. This design aims to prevent user errors and meet specific user needs. In the internal circulation mode, three confirmation steps are provided. If "No" is selected at any of the following steps: waiting for user confirmation of "Internal Circulation Mode," waiting for user confirmation of "Electric Heating Cooking," or waiting for user confirmation of "External Window Completely Closed," the system will redirect back to the initial mode selection step. When the "No" option is selected a second time, the range hood will redirect to the external exhaust mode confirmation screen. Once the user confirms external exhaust mode, the range hood will execute subsequent external exhaust mode commands.

[0035] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A range hood suitable for extremely cold regions, characterized in that, The system includes a smoke hood and a housing connected to the smoke hood; the housing contains a fan cabinet, the fan cabinet has a first air outlet, the first air outlet has a first valve plate for closing and opening the first air outlet; the first air outlet is also connected to an internal circulation duct, the end of the internal circulation duct has a second air outlet, the second air outlet has a second valve plate for closing and opening the second air outlet, and the internal circulation duct contains a filter screen.

2. The range hood suitable for extremely cold regions according to claim 1, characterized in that, The first valve plate is connected to the first drive mechanism, the second valve plate is connected to the second drive mechanism, and both the first drive mechanism and the second drive mechanism are connected to the control system.

3. The range hood suitable for extremely cold regions according to claim 1 or 2, characterized in that, A CO sensor is installed inside the second air outlet.

4. The range hood suitable for extremely cold regions according to claim 3, characterized in that, An alarm is installed on the outer wall of the smoke hood.

5. The range hood suitable for extremely cold regions according to claim 1 or 2, characterized in that, The housing is provided with an external exhaust pipe corresponding to the first air outlet, and an internal exhaust port corresponding to the second air outlet; And / or, the filter screen is inserted into the interior of the internal circulation duct along the radial direction of the internal circulation duct; the housing is provided with a cover plate corresponding to the filter screen.

6. A control method for a range hood suitable for extremely cold regions according to any one of claims 1 to 5, characterized in that, Includes the following steps: After the range hood is started, the current outdoor ambient temperature is obtained. When the outdoor ambient temperature is greater than the set temperature, the first valve plate is controlled to open the first air outlet, and the second valve plate is controlled to close the second air outlet, thus starting the exhaust mode. When the outdoor ambient temperature is less than or equal to the set temperature, the first valve plate is controlled to close the first air outlet, and the second valve plate is controlled to open the second air outlet to start the internal circulation mode.

7. The control method for a range hood suitable for extremely cold regions according to claim 6, characterized in that, The air handling unit has a normal airflow setting and a gentle airflow setting, with the gentle airflow setting having a lower airflow rate than the normal airflow setting. In the external exhaust mode, the airflow of the air handling unit is controlled at the normal airflow setting. In the internal circulation mode, the airflow of the air handling unit is controlled at the gentle airflow setting.

8. The control method for a range hood suitable for extremely cold regions according to claim 6, characterized in that, Before activating the external exhaust mode, the user must confirm whether to activate the external exhaust mode; before activating the internal circulation mode, the user must confirm in sequence whether to activate the internal circulation mode, whether to use electric heating for cooking, and whether the external window is completely closed.

9. The control method for a range hood suitable for extremely cold regions according to claim 6, characterized in that, When the internal circulation mode is activated, the CO concentration in the indoor air is monitored in real time by the CO sensor at the second air outlet. When the CO concentration exceeds the set threshold, the external exhaust mode is activated.

10. The control method for a range hood suitable for extremely cold regions according to claim 9, characterized in that, When the CO sensor detects that the indoor air CO concentration exceeds the set threshold, it will trigger an alarm.

11. The control method for a range hood suitable for extremely cold regions according to claim 6, characterized in that, The range hood is equipped with a control system, which is connected to the first valve plate and the second valve plate; the control system is connected to a wireless terminal and obtains the current outdoor ambient temperature through the wireless terminal.

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