A refrigeration type range hood and a control method thereof

Abstract

A kind of refrigeration range hood and its control method, the range hood is opened with air vent on fan volute ring wall, air guide valve is installed at air vent, air guide valve is used to guide the hot air that heat-dissipating fan blows into the inside of volute, inside wall of volute towards the inside of air guide valve is equipped with inside pressure sensor, outside wall of air guide valve towards the outside of volute is equipped with outside pressure sensor, controller can receive the output signal of inside pressure sensor and outside pressure sensor, and according to the signal received, control the motor, and then adjust the rotation angle of air guide valve.The refrigeration range hood guides the hot air that heat-dissipating fan blows into the inside of volute, on the one hand, it is beneficial to improve the working efficiency of air conditioner, on the other hand, hot air blows into the inside of volute can clean volute and impeller, in addition, air guide valve installed at air vent has inside and outside pressure sensor, controller can dynamically adjust air guide valve opening according to inside and outside pressure difference, ensure that air guide valve is in the best state.

Description

TECHNICAL FIELD

[0001] The present application relates to a range hood, in particular to a refrigeration type range hood and a control method thereof. BACKGROUND

[0002] Various refrigeration type range hoods are disclosed in the prior art, which increase air conditioning components on the basis of the range hood platform, and the compressor, condenser and evaporator are connected through refrigerant pipelines. The refrigeration type range hood can realize all functions of the range hood and the function of the air conditioner. During daily use, a large amount of oil dirt will be left on the volute and impeller of the refrigeration type range hood. After being dried for a long time, the oil dirt will form a hard grease layer on the volute and impeller, which is very difficult to clean. The traditional range hoods on the market often do not have a cleaning function. Even if the cleaning function is added, it is only to simply increase a water pump and a heating rod to heat and spray the added water from the outside for cleaning, which needs to increase additional components and reduces the reliability of the whole machine. At the same time, an external water source needs to be added, which increases the degree of complexity. Although the prior art also discloses a range hood for cleaning the volute with condensation water, such as the Chinese utility model patent with the patent number 202220018984.6 (the authorized announcement number is CN 217004584 U) which discloses an air conditioning type range hood. The air conditioning type range hood is provided with a water collecting box in the shell for collecting the condensation water condensed on the surface of the evaporator. A steam generator is installed in the shell. The water collecting box is connected with the water inlet of the steam generator through a water outlet pipe. The steam outlet of the steam generator is connected with the air duct inside the range hood. The air conditioning condensation water is evaporated by the steam generator and enters the inside of the range hood. The high-temperature water vapor passes through the impeller to clean the impeller. Although the air conditioning type range hood uses condensation water to clean the impeller, the condensation water needs to be heated by the steam generator in the shell, which not only has a complex structure, but also increases the cost. The heat generated by the condenser during the operation of the air conditioner is not effectively utilized. In addition, the Chinese utility model patent with the patent number 201220666311.8 (the authorized announcement number is CN 203051230 U) discloses a fan volute middle plate guide vane air inlet structure of an oil extraction hood. The structure includes a ring-shaped middle plate connected with the front cover plate and the rear cover plate of the volute. The angle of the volute tongue at the front end of the ring-shaped middle plate is designed to prevent the air volume from entering the outlet and flowing back to the volute. The rear end of the volute tongue is provided with an air inlet. The rear end of the ring-shaped middle plate volute tongue is provided with an air inlet. 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, which improves the efficiency of the fan and increases the air volume at the outlet. However, the air inlet structure cannot adjust the air volume of the air inlet, and the intelligent degree is insufficient. SUMMARY

[0003] The first technical problem to be solved by the present application is to provide a refrigeration type range hood capable of intelligently adjusting the air intake amount of a heat dissipation fan into the range hood in view of the prior art.

[0004] The second technical problem to be solved by the present application is to provide a control method of the refrigeration type range hood in view of the prior art.

[0005] The technical solution adopted by the present application to solve the first technical problem is as follows: the refrigeration type range hood comprises a range hood module, a compressor, a heat dissipation module and an indoor unit module, the range hood module comprises a range hood, the compressor, the heat dissipation module and the indoor unit module are connected in communication through a refrigerant pipeline, the heat dissipation module and the indoor unit module are arranged outside the range hood, the range hood comprises a volute and an impeller installed inside the volute, the heat dissipation module is provided with a heat dissipation fan, and the range hood is characterized in that: a ventilation opening is formed in the ring wall of the volute, a guide valve for guiding the hot air blown out by the heat dissipation fan into the interior of the volute is installed at the ventilation opening, an inner side pressure sensor is installed on the inner side wall of the volute towards the guide valve, an outer side pressure sensor is installed on the outer side wall of the volute towards the guide valve, a controller and a motor for driving the rotation of the guide valve are further included, the controller can receive the output signals of the inner side pressure sensor and the outer side pressure sensor, and control the motor according to the received signals, thereby adjusting the rotation angle of the guide valve.

[0006] Preferably, the guide part of the guide valve is a flat plate, and the included angle A between the tangent line of the ring wall of the volute at the root of the guide valve and the guide valve is in the range of 10°≤A≤50°. The guide valve adopts the above-mentioned angle range, which can effectively guide the air of the heat dissipation fan into the volute of the range hood, while preventing the air in the volute of the range hood from overflowing outwards through the ventilation opening.

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

[0008] Further preferably, a volute tongue is installed on the ring wall of the volute, the vertical distance between the edge of the 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] Further preferably, the ventilation opening is formed in the front section of the ring wall of the volute, the guide valve is installed on the front side edge of the ventilation opening, and the length of the guide valve changes with the position of the ventilation opening, the ventilation opening is relatively close to the root of the volute tongue, the shorter the guide valve is, the farther the ventilation opening is from the volute tongue, and the longer the length of the guide valve is. In this way, the hot air blown out by the heat dissipation fan can more smoothly enter the interior of the volute, and when there is back pressure at the outlet of the fan, the air in the interior of the volute can be prevented from overflowing out through the ventilation opening.

[0010] In order to make the air flow blown by the heat dissipation fan enter the inside of the range hood more smoothly, the range hood and the heat dissipation fan are both centrifugal fans, and the impeller center shaft of the range hood and the impeller center shaft of the heat dissipation fan are parallel to each other.

[0011] Preferably, the range hood module comprises an upper box body and an air inlet body arranged at the bottom of the upper box body, the range hood is arranged in the inside of the upper box body, and the air inlet body is provided with a smoke inlet which is communicated with the air inlet of the range hood.

[0012] The heat dissipation module can have various installation structures, and preferably, the heat dissipation module is arranged at the top of the upper box body, the heat dissipation fan is arranged above the range hood, and the air outlet of the heat dissipation fan faces downward and is directed to the ventilation opening.

[0013] The heat dissipation module and the inner machine module can have various installation structures, and preferably, the heat dissipation module comprises a condenser and the heat dissipation fan, the inner machine module comprises an evaporator and an inner machine fan, and the heat dissipation module and the inner machine module are arranged adjacently.

[0014] The technical scheme adopted by the present application to solve the second technical problem is that the control method of the refrigeration type range hood comprises the following steps:

[0015] S1, starting;

[0016] S2, if the user starts the range hood, then entering steps S4 to S10;

[0017] S3, if the user only starts the refrigeration function, then entering steps S11 to S16;

[0018] S4, the range hood starts to operate;

[0019] S5, judging whether the user starts the refrigeration function;

[0020] if yes, then entering step S6;

[0021] if no, then returning to step S4;

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

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

[0024] if yes, then entering step S8;

[0025] if no, then returning to step S6;

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

[0027] If yes, go to step S9;

[0028] If no, 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 keeps the existing state;

[0030] S10, if the user adjusts the range of the smoke machine, return to step S7;

[0031] If the user turns off the refrigeration function, the air guide valve is closed, and the process is ended.

[0032] S11, the motor drives the air guide valve to open, the default weak gear of the smoke machine, the inner side pressure sensor detects the pressure F1, the outer side pressure sensor detects the pressure F2, and the inner and outer side pressure difference ΔF=F1-F2;

[0033] S12, judge whether ΔF is the maximum value;

[0034] If yes, go to step S13;

[0035] If no, return to step S11;

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

[0037] If yes, go to step S14;

[0038] If no, the motor drives the air guide valve to rotate, and returns to step S13;

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

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

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

[0042] Compared with the prior art, the advantages of the application are that: the cooling type smoke machine guides the hot air of the heat dissipation channel into the interior of the volute of the smoke fan through the ventilation opening of the volute ring wall, and the negative pressure generated by the rotation of the smoke fan can suck the hot air into the interior of the volute, which can improve the working efficiency of the air conditioner, and the hot air blowing into the interior of the volute can clean the volute and the impeller, in addition, the air guide valve installed at the ventilation opening is provided with inner and outer side pressure sensors, and the controller can dynamically adjust the opening degree of the air guide valve according to the inner and outer pressure difference, so that the air guide valve is kept in the best state. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 It is a structure schematic view of the smoke machine of the embodiment of the application;

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

[0045] Figure 3 This is a connection diagram of the 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 This is a control logic diagram of the control method according to an embodiment of the present invention. Detailed Implementation

[0048] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0049] like Figures 1 to 4 As shown, the refrigerated range hood of this embodiment includes a fume extraction module 1, a compressor 2, a heat dissipation module 3, and an indoor unit module 4. The fume extraction module 1 includes a fume extraction fan 11, an upper housing 12, and an air inlet 13. The fume extraction fan 11 is installed inside the upper housing 12, and the air inlet 13 is installed at the bottom of the upper housing 12. The air inlet 13 has a fume inlet that communicates with the air inlet of the fume extraction fan 11. The fume extraction 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 annular wall 114 and is close to the fan outlet.

[0050] The compressor 2 is installed above the air inlet 13 and on the right side of the upper casing 12, with the indoor unit module 4 located above the compressor 2. The heat dissipation module 3 is located at the top of the upper casing 12, and the heat dissipation module 3 and the indoor unit module 4 are arranged adjacent to each other, sharing an air inlet. The heat dissipation module 3 includes a condenser 32 and a cooling fan 31, while the indoor unit module 4 includes an evaporator 42 and an indoor unit fan 41. The compressor 2, condenser 32, and evaporator 42 are connected via refrigerant piping 5. The compressor 2, condenser 32, and evaporator 42 constitute an air conditioning assembly, and their specific working principle is the same as that of existing air conditioners, which will not be described in detail here. An indoor unit air outlet 43 is opened at the top of the air inlet 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 operating in cooling mode, cold air is blown out from the indoor unit air outlet 43, improving the user's cooking experience.

[0051] The heat dissipation fan 31 of the embodiment is a centrifugal fan, and the impeller center axis of the heat dissipation fan 31 is parallel to the impeller center axis of the smoke suction fan 11. The smoke suction fan 11 is provided with a vent 115 on the volute ring wall 114, the heat dissipation fan 31 is arranged above the smoke suction fan 11, the air outlet of the heat dissipation fan 31 faces downward and toward the vent 115, and the air outlet of the heat dissipation fan 31 is in fluid communication with the vent 115. In the embodiment, the vent 115 is arranged at the front quarter of the volute ring wall 114 and close to the root of the volute tongue 113. When there is back pressure at the outlet of the smoke machine, the air in the volute 111 will not overflow from the vent 115. The position of the vent 115 should be as close to the volute tongue 113 as possible, preferably at the front quarter of the ring wall.

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

[0053] The vertical distance between the edge of the 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. L1 and L2 satisfy the condition of 0≤L1-L2≤6mm, and preferably L1=L2.

[0054] An inner side pressure sensor 81 is arranged on the inner side wall of the guide valve 6 facing the inside of the volute 111, and an outer side pressure sensor 82 is arranged on the outer side wall of the guide valve 6 facing the outside of the volute 111. The inner side pressure sensor 81 is used to detect the pressure F1 of the guide valve 6, and the outer side pressure sensor is used to detect the pressure F2 of the outer side of the 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 electric signals and transmitted to the controller, and the controller outputs instructions to the motor 7, and the motor 7 drives the air guide valve 6 to rotate according to the received instructions, and the rotation angle of the air guide valve 6 is adjusted so that the air guide valve 6 is always at the optimal angle position. The inner and outer pressure difference ΔF=F1-F2, when L1=L2, the air guide part of the air guide valve 6 and the lowest part of the volute tongue are on the same concentric circle, at this time ΔF=Fn, the pressure difference ΔF value reaches the maximum, the most conducive to the heat dissipation fan 31 air intake. When ΔF=0, the air guide valve 6 is at the critical position, the inner and outer sides of the air vent 115 are balanced, and the air vent 115 does not intake air.

[0056] As shown in Figure 5 The control method of the refrigeration range hood of the embodiment specifically includes the following steps:

[0057] S1, start;

[0058] S2, if the user starts the range hood, go to steps S4-S10;

[0059] S3, if the user only starts the refrigeration function, go to steps S11-S16;

[0060] S4, the range hood starts to operate;

[0061] S5, judge whether the user starts the refrigeration function;

[0062] If yes, go to step S6;

[0063] If no, 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, judge whether ΔF is the maximum value;

[0066] If yes, go to step S8;

[0067] If no, return to step S6;

[0068] S8, whether ΔF is greater than Fn;

[0069] If yes, go to step S9;

[0070] If no, the motor 7 drives the air guide valve 6 to rotate, and returns to step S8;

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

[0072] S10, if the user adjusts the range of the range hood, return to step S7;

[0073] If the user turns off the refrigeration 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 in the default weak gear, the inner side pressure sensor 81 detects the pressure F1, the outer side pressure sensor 82 detects the pressure F2, the inner and outer side pressure difference ΔF=F1-F2;

[0075] S12, determine whether ΔF is the maximum value;

[0076] If yes, go to step S13;

[0077] If no, return to step S11;

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

[0079] If yes, go to step S14;

[0080] If no, the motor 7 drives the air guide valve 6 to rotate, and return to step S13;

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

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

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

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

[0085] The term "in fluid communication" as used herein refers to the spatial relationship between two components or locations, collectively referred to as a first location and a second location, such that a fluid, gas, liquid, or mixture of the two, can flow from the first location to the second location along a flow path. The first location and the second location can be in direct fluid communication with each other, or they can be in indirect fluid communication with each other through at least one third location, which can be a fluid pathway such as a pipe, channel, conduit, flow guide, hole, slot, etc., or a chamber that allows fluid to flow therethrough, or a combination thereof.

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), the range hood module (1) comprising a range hood fan (11), the compressor (2), the heat dissipation module (3) and the indoor module (4) being connected through a refrigerant pipeline (5), the heat dissipation module (3) and the indoor module (4) being arranged outside the range hood fan (11), the range hood fan (11) comprising a volute (111) and an impeller (112) arranged inside the volute (111), the heat dissipation module (3) having a heat dissipation fan (31), characterized in that: The oil fume suction fan (11) and the heat dissipation fan (31) are both centrifugal fans, the volute ring wall (114) of the oil fume suction fan (11) is provided with a ventilation opening (115), a guide valve (6) is installed at the ventilation opening (115) and used to guide the hot air blown by the heat dissipation fan (31) into the inside of the volute (111), an inner side pressure sensor (81) is installed on the inner side wall of the guide valve (6) towards the inside of the volute (111), an outer side pressure sensor (82) is installed on the outer side wall of the guide valve (6) towards the outside of the volute (111), and a controller and a motor (7) used to drive the rotation of the guide valve (6) are further included, the controller can receive the output signals of the inner side pressure sensor (81) and the outer side pressure sensor (82) and control the motor (7) according to the received signals, thereby adjusting the rotation angle of the guide valve (6).

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

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

4. The refrigerated extractor hood according to claim 3, characterized in that: A volute tongue (113) is installed on the volute ring wall (114), the vertical distance between the edge of the guide valve (6) closest to the impeller (112) and the outer peripheral surface of the impeller (112) is L1, 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, and 0≤L1-L2≤6mm is satisfied.

5. The refrigerated extractor hood according to claim 4, characterized in that: The ventilation opening (115) is arranged at the front section of the volute ring wall (114), the guide valve (6) is installed on the front side edge of the ventilation opening (115), and the length of the guide valve (6) changes with the position of the ventilation opening (115), that is, when the ventilation opening (115) is relatively close to the root of the volute tongue (113), the guide valve (6) is shorter, and when the ventilation opening (115) is relatively far from the volute tongue (113), the length of the guide valve (6) is longer.

6. The refrigerated extractor hood according to claim 1, characterized in that: The central shaft of the impeller of the oil fume suction fan (11) is parallel to the central shaft of the impeller of the heat dissipation fan (31).

7. The refrigerated extractor hood according to any of claims 1 to 6, characterized in that: The oil fume suction module (1) includes an upper cabinet (12) and an air inlet body (13) arranged at the bottom of the upper cabinet (12), the oil fume suction fan (11) is installed in the inside of the upper cabinet (12), and the air inlet body (13) is provided with an oil fume inlet opening communicated with the air inlet opening of the oil fume suction fan (11).

8. The refrigerated extractor hood according to claim 7, characterized in that: The heat dissipation module (3) is arranged at the top of the upper cabinet (12), the heat dissipation fan (31) is arranged above the oil fume suction fan (11), and the air outlet opening of the heat dissipation fan (31) faces downward and towards the ventilation opening (115).

9. The refrigerated extractor hood according to claim 8, characterized in that: The heat dissipation module (3) includes a condenser (32) and the heat dissipation fan (31), the indoor unit module (4) includes an evaporator (42) and an indoor unit fan (41), and the heat dissipation module (3) and the indoor unit module (4) are arranged adjacently.

10. A control method of a refrigerating range hood, characterized by: The control method is applied to the refrigeration type oil fume suction machine in any one of claims 1 to 9, and the control method includes the following steps: S1, starting; S2, if the user starts the range hood, then go to step S4 to S10; S3, if the user only starts the refrigeration function, then go to step S11 to S16; S4, the range hood starts to run; S5, judge whether the user starts the refrigeration function; if yes, go to step S6; if no, return to step S4; S6, the motor (7) drives the air guide valve (6) to open, the inner side pressure sensor (81) detects the pressure F1, the outer side pressure sensor (82) detects the pressure F2, the inner and outer side pressure difference ΔF=F1-F2; S7, judge whether ΔF is the maximum value; if yes, go to step S8; if no, return to step S6; S8, whether ΔF is not greater than Fn; if yes, go to step S9; if no, the motor (7) drives the air guide valve (6) to rotate, and return to step S8; S9, the motor (7) stops working, and the air guide valve (6) keeps the existing state; S10, if the user adjusts the range hood gear, then return to step S7; if the user closes the refrigeration function, then the air guide valve (6) is closed, and the process is ended; S11, the motor (7) drives the air guide valve (6) to open, the range hood is in the default weak gear, the inner side pressure sensor (81) detects the pressure F1, the outer side pressure sensor (82) detects the pressure F2, the inner and outer side pressure difference ΔF=F1-F2; S12, judge whether ΔF is the maximum value; if yes, go to step S13; if no, return to step S11; S13, whether ΔF is not greater than Fn; if yes, go to step S14; if no, the motor (7) drives the air guide valve (6) to rotate, and return to step S13; S14, the motor (7) stops working, and the air guide valve (6) keeps the existing state; S15, the user closes the refrigeration function; S16, the air guide valve (6) is closed, and the process is ended.

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