Refrigeration type range hood and control method thereof

Abstract

The invention relates to a refrigeration type extractor hood and a control method thereof, the refrigeration type extractor hood comprises an oil smoke suction module, a compressor, a heat dissipation module and an indoor unit module, the oil smoke suction module comprises an oil smoke suction fan, the heat dissipation module comprises a condenser and a heat dissipation fan, the indoor unit module comprises an evaporator and an indoor unit fan, and a ventilation opening is formed in the volute annular wall of the oil smoke suction fan. An air outlet of the heat dissipation fan is in fluid communication with the interior of the volute through the ventilation opening, an air guide valve is installed at the ventilation opening, the temperature sensor is used for detecting the temperature outside the range hood, and the controller can receive output signals of the temperature sensor and control the working states of the heat dissipation fan, the indoor unit fan and the air guide valve. The controller of the refrigeration type range hood controls the working states of the cooling fan, the indoor unit fan and the air guide valve according to the received output signal of the temperature sensor, the intelligent degree is high, the control method of the refrigeration type range hood is combined with water level judgment of the float switch to achieve intelligent treatment of condensate water, and the water treatment efficiency is improved.

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. On the basis of the range hood platform, an air conditioning component is added. 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. At present, a variety of products are used to realize the functions of fresh air, air conditioning, range hood, etc., which occupies a large kitchen space, and the condensed water is discharged externally. The existing integrated kitchen air conditioner integrates the air conditioner and the range hood, realizing a technical solution without an external machine and condensed water discharge. The condensed water is dripped on the condenser by using a water pump and a liquid distributor, and the wind of the range hood is used to exchange heat with the condenser, so that the condensed water evaporates. The oil fume and the condensed water on the condenser are used for heat exchange and evaporation. As the working time increases, oil stains will adhere to the condenser, thereby affecting the adhesion ability of the condensed water on the condenser, thereby reducing the water treatment capacity. Or when the range hood is turned on the strong gear, the residence time of the condensed water on the condenser is shortened, which greatly reduces the evaporation ability of the condensed water.

[0003] During daily use of refrigeration range hoods, 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 parts need to be added, which reduces the reliability of the whole machine. At the same time, it is necessary to add water from the outside, which increases the complexity. In addition, the heat generated by the condenser when the air conditioner is working is not effectively utilized. In summary, the existing refrigeration range hoods need to be further improved. Summary of the invention

[0004] The first technical problem to be solved by the present invention is to provide a refrigeration range hood capable of intelligently adjusting the working state according to the ambient temperature in view of the above-mentioned existing technical status.

[0005] The second technical problem to be solved by the present invention is to provide a control method for a refrigeration range hood that can effectively process air-conditioning condensate water and has a high degree of system intelligence in response to the above-mentioned existing technical status.

[0006] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: 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 heat dissipation module and the indoor module are arranged on the outside of the range hood fan, the heat dissipation module includes a condenser and a heat dissipation fan, the indoor module includes an evaporator and an indoor fan, the compressor, condenser and evaporator are connected through a refrigerant pipeline, the range hood fan includes a volute, and is characterized in that: a vent is opened on the volute ring wall of the range hood fan, the air outlet of the heat dissipation fan can be fluidly connected with the inside of the volute through the vent, an air guide valve for opening or closing the vent is installed at the vent, and a temperature sensor and a controller are also included, the temperature sensor is used to detect the temperature outside the range hood, and the controller can receive the output signal of the temperature sensor and control the working states of the heat dissipation fan, the indoor fan and the air guide valve accordingly according to the received signal.

[0007] In order to realize intelligent processing of condensed water, the refrigeration range hood also includes a water receiving box and a steam generating device. The water receiving box is used to collect condensed water condensed on the surface of the evaporator. The water receiving box is installed with a first float switch and a second float switch for sensing different water level heights. The water outlet of the water receiving box is connected to the water inlet of the steam generating device, and the steam outlet of the steam generating device is connected to the inside of the volute of the range hood fan. The controller can receive output signals of the first float switch and the second float switch and control the working states of the heat dissipation fan, the indoor fan and the steam generating device accordingly according to the received signals.

[0008] In order to smoothly transport the condensed water in the water receiving box to the condenser, a water outlet pipe is connected between the water receiving box and the condenser, and a water pump for transporting the condensed water in the water receiving box to the surface of the condenser is installed on the water outlet pipe.

[0009] Preferably, when the air guide valve is open, the air outlet of the heat dissipation fan is connected to the interior of the volute of the range fumes exhaust fan through the vent, and when the air guide valve is closed, the air outlet of the heat dissipation fan is isolated from the interior of the volute of the range fumes exhaust fan.

[0010] The air guide valve may have a variety of structures. Preferably, the air guide valve is a rotary valve.

[0011] Further preferably, the vent is opened at the front section of the volute ring wall and close to the root of the volute tongue of the range hood fan, and the air guide valve is rotatably connected to the front edge of the vent. The vent is arranged at the above position, so that the hot air blown out by the heat dissipation module can enter the volute more smoothly, and 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.

[0012] Further preferably, the range fumes suction fan and the heat dissipation fan are both centrifugal fans, and the central axis of the impeller of the range fumes suction fan and the central axis of the impeller of the heat dissipation fan are parallel to each other.

[0013] 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 heat dissipation fan is arranged above the range fumes exhaust fan, and the air outlet of the heat dissipation fan faces downward and toward the ventilation port.

[0014] Further preferably, along the air flow direction, the heat dissipation fan is arranged downstream of the condenser.

[0015] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: a control method for a refrigeration range hood, comprising the following steps:

[0016] S1, air conditioning is turned on;

[0017] S2. Determine the indoor temperature T, if T ≥ T H , then proceed to steps S3 and S4 in sequence; if T≤T L , then go to step S5-S8; if T L <T<T H , then proceed to steps S11 and S12;

[0018] S3, the rotary valve is opened;

[0019] S4, the cooling fan and the indoor fan are both adjusted to high gear, and then enter step S9;

[0020] S5, the rotary valve is opened;

[0021] S6, the cooling fan and the internal fan are both adjusted to high gear;

[0022] S7, determining whether the first float switch is activated;

[0023] If yes, proceed to step S8;

[0024] If not, return to step S5;

[0025] S8. Reduce the air volume of the cooling fan and the internal fan;

[0026] S9, determining whether the second float switch is activated;

[0027] If yes, the steam generating device is turned on, and then the process goes to step S10;

[0028] If not, return to step S8;

[0029] S10, determining whether the steam generating device is turned off;

[0030] If yes, the process ends;

[0031] If not, return to step S7;

[0032] S11, rotary valve is opened;

[0033] S12, the cooling fan and the indoor fan are both adjusted to low gear, and then enter step S9.

[0034] Compared with the prior art, the advantages of the present invention are: the heat dissipation fan outlet of the heat dissipation module of the refrigeration type range hood is connected with the inside of the volute of the range hood fan through the ventilation hole on the volute ring wall, the ventilation hole is opened and closed by the air guide valve, the temperature sensor can detect the external ambient temperature, and the controller controls the working states of the heat dissipation fan, the indoor fan and the air guide valve according to the output signal received from the temperature sensor, with a high degree of intelligence. The control method of the refrigeration type range hood can also combine the water level judgment of the float switch to realize the intelligent treatment of condensed water and improve the water treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of the structure of a range hood according to an embodiment of the present invention;

[0036] Figure 2 A connection diagram of an air conditioning assembly according to an embodiment of the present invention;

[0037] Figure 3 Flow chart of a control method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below with reference to the accompanying drawings.

[0039] like Figure 1 and Figure 2 As shown, the refrigeration type range hood of this embodiment includes a range hood module 1, a compressor 2, a heat dissipation module 3 and an indoor module 4. The range hood module 1 includes a range hood fan 11. The heat dissipation module 3 and the indoor module 4 are arranged outside the range hood fan 11. The heat dissipation module 3 includes a condenser 31 and a heat dissipation fan 32. The heat dissipation fan 32 is used to dissipate heat from the condenser 31. In this embodiment, along the air flow direction, the heat dissipation fan 32 is arranged downstream of the condenser 31. The indoor module 4 includes an evaporator 41 and an indoor fan 42. In the cooling mode, the indoor fan 42 blows out cold air. The compressor 2, the condenser 31 and the evaporator 41 are connected through the refrigerant pipeline 5. The compressor 2, the condenser 31 and the evaporator 41 constitute an air conditioning component. The working principle thereof can refer to the existing air conditioning principle and will not be described in detail here.

[0040] In this embodiment, both the range hood fan 11 and the heat dissipation fan 32 are centrifugal fans. The heat dissipation fan 32 is arranged above the range hood fan 11, and the central axis of the impeller of the range hood fan 11 is parallel to the central axis of the impeller of the heat dissipation fan 32. The range hood fan 11 includes a volute 111, and a vent 113 is provided on the volute ring wall 112 of the range hood fan 11. The air outlet of the heat dissipation fan 32 faces downward and toward the vent 113, and the air outlet of the heat dissipation fan 31 is fluidly connected with the vent 114. An air guide valve 6 for opening or closing the vent 113 is installed at the vent 113. When the air guide valve 6 is opened, the hot air blown out by the heat dissipation fan 32 enters the interior of the volute of the range hood fan 11, and when the air guide valve 6 is closed, the air outlet of the heat dissipation fan 32 is isolated from the interior of the volute of the range hood fan 11. The air guide valve 6 can be in a variety of different forms. The air guide valve 6 in this embodiment is a rotary valve, and the air guide valve 6 is rotatably connected to the front edge of the vent 113 .

[0041] In this embodiment, the vent 113 is opened at the front section of the volute ring wall 112 and close to the root of the volute tongue 114 of the range hood fan 11. The vent 113 should be located as close to the front 1 / 4 of the ring wall as possible, and the closer to the volute tongue 114, the better. In this way, the hot air blown by the heat dissipation fan 32 can 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 113 and flowing back into the heat dissipation fan 32.

[0042] The refrigeration range hood also includes a temperature sensor (not shown) for detecting the external temperature of the range hood. Usually, the temperature sensor can be installed at the return air outlet of the internal unit of the internal unit module. The controller can receive the output signal of the temperature sensor and control the working state of the heat dissipation fan 32, the internal unit fan 42 and the air guide valve 6 accordingly according to the received signal. For example, when the ambient temperature is low, it is used for no requirement on the cooling capacity, the heat dissipation fan 32 and the internal unit fan 42 can be operated at a low gear, and the air guide valve 6 can be opened to a small angle. When the ambient temperature is high, it is used for certain requirements on the cooling capacity, the heat dissipation fan 32 and the internal unit fan 42 can be operated at a medium gear or a high gear, and the opening of the air guide valve 6 can be adjusted to a larger degree to improve the heat dissipation effect of the condenser 31.

[0043] The refrigeration range hood of this embodiment also includes a water receiving box 7 and a steam generating device 8. The water receiving box 7 is arranged below the evaporator 41 to collect condensed water condensed on the surface of the evaporator 41. The first float switch 91 and the second float switch 92 are installed on the water receiving box 7. The first float switch 91 senses the water level, and the second float switch 92 senses the high water level. The first float switch 91 and the second float switch 92 are used to sense different water level heights. The water outlet of the water receiving box 7 is connected to the water inlet of the steam generating device 8, and the steam outlet of the steam generating device 8 is connected to the inside of the volute of the range hood fan 11. The condensed water in the water receiving box 7 enters the evaporation generating device 8, forms steam after evaporation, and enters the inside of the volute.

[0044] The controller can receive the output signals of the first float switch 91 and the second float switch 92 and control the working states of the heat dissipation fan 32, the indoor fan 42 and the steam generator 8 accordingly according to the received signals. After the system has been running for a period of time, if the first float switch is activated, the speed of the evaporator fan and the heat dissipation fan is reduced. If the second float switch 92 is activated after running for a period of time, it means that there is too much condensed water. At this time, the refrigeration system can no longer handle the residual condensed water, so the steam generator 8 starts to work, on the one hand, to handle the condensed water, on the other hand, to clean the volute.

[0045] In addition, a water outlet pipe 10 is connected between the water receiving box 7 and the condenser 31, and a water pump 100 is installed on the water outlet pipe 10 for conveying the condensed water in the water receiving box 7 to the surface of the condenser 31. Under the action of the water pump 100, the condensed water in the water receiving box 7 is conveyed to the surface of the condenser 31 to cool the condenser 31, which improves the heat exchange effect of the condenser 31 and the energy efficiency of the air conditioner on the one hand, and also realizes the effective treatment of the condensed water on the other hand.

[0046] like Figure 3 As shown, the control method of the refrigeration type range hood of this embodiment includes the following steps:

[0047] S1, air conditioning is turned on;

[0048] S2. Determine the indoor temperature T, if T ≥ T H , then proceed to steps S3 and S4 in sequence; if T≤T L , then go to step S5-S8; if T L <T<T H , then proceed to steps S11 and S12;

[0049] S3, the rotary valve is opened;

[0050] S4, the cooling fan 32 and the indoor fan 42 are both adjusted to the strong gear, and then enter step S9;

[0051] S5, the rotary valve is opened;

[0052] S6, the cooling fan 32 and the indoor fan 42 are both adjusted to the strong gear;

[0053] S7, determining whether the first float switch 91 is activated;

[0054] If yes, proceed to step S8;

[0055] If not, return to step S5;

[0056] S8, reduce the air volume of the cooling fan 32, and reduce the air volume of the internal fan 42;

[0057] S9, determining whether the second float switch 92 is activated;

[0058] If yes, the steam generating device 8 is turned on, and then the process goes to step S10;

[0059] If not, return to step S8;

[0060] S10, determining whether the steam generating device 8 is turned off;

[0061] If yes, the process ends;

[0062] If not, return to step S7;

[0063] S11, rotary valve is opened;

[0064] S12, the heat dissipation fan 32 and the indoor fan 42 are both adjusted to a low gear, and then the process proceeds to step S9.

[0065] Assume that in the above control method, T L =27℃, T H =35℃, then through the initial temperature judgment, when the room temperature is ≤27℃, the user turns on the air conditioner, and the default is the dehumidification condition. At this time, the user has no requirements for cooling capacity, and the heat dissipation fan 32 and the indoor fan 42 operate at a low gear. If the second float switch 92 is activated after running for a period of time, it means that there is too much condensed water. At this time, the refrigeration system can no longer handle the residual condensed water. At this time, the steam generating device 8 starts to work, on the one hand, it handles the condensed water, and on the other hand, it cleans the volute. When the room temperature is greater than 27°C and less than 35°C, the user has certain requirements for cooling capacity. At this time, the heat dissipation fan 32 and the indoor fan 42 are operated at a high gear or a medium gear. At this time, if the first float switch 91 is activated, the speed of the heat dissipation fan 32 and the indoor fan 42 is reduced. If the second float switch 92 is activated after running for a period of time, the steam generating device 8 is turned on for self-cleaning to assist in treating condensed water; when the room temperature is ≥35°C, the user has high requirements for cooling capacity. At this time, the speed of the heat dissipation fan 32 and the indoor fan 42 cannot be reduced. If the second float switch 92 is activated after running for a period of time, the steam generating device 8 is turned on for self-cleaning to assist in treating condensed water.

[0066] 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.

[0067] 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 heat dissipation module (3) and the indoor module (4) are arranged outside the range hood fan (11), the heat dissipation module (3) comprises a condenser (31) and a heat dissipation fan (32), the indoor module (4) comprises an evaporator (41) and an indoor fan (42), the compressor (2), the condenser (31) and the evaporator (41) are connected via a refrigerant pipeline (5), the range hood fan (11) comprises a volute (111), and is characterized in that: The volute ring wall (112) of the range hood exhaust fan (11) is provided with a vent (113); the air outlet of the heat dissipation fan (32) can be fluidically connected to the interior of the volute through the vent (113); an air guide valve (6) for opening or closing the vent (113) is installed at the vent (113); a temperature sensor and a controller are also included; the temperature sensor is used to detect the temperature outside the range hood; the controller can receive an output signal of the temperature sensor and control the working states of the heat dissipation fan (32), the internal fan (42) and the air guide valve (6) accordingly according to the received signal.

2. The refrigeration type range hood according to claim 1, characterized in that: The invention also comprises a water receiving box (7) and a steam generating device (8), wherein the water receiving box (7) is used to collect condensed water condensed on the surface of the evaporator (41), and a first float switch (91) and a second float switch (92) for sensing different water levels are installed on the water receiving box (7), the water outlet of the water receiving box (7) is connected to the water inlet of the steam generating device (8), and the steam outlet of the steam generating device (8) is connected to the inside of the volute of the range hood exhaust fan (11), and the controller can receive output signals of the first float switch (91) and the second float switch (92) and control the working states of the heat dissipation fan (32), the indoor fan (42) and the steam generating device (8) accordingly according to the received signals.

3. The refrigeration type range hood according to claim 2, characterized in that: A water outlet pipe (10) is connected between the water receiving box (7) and the condenser (31), and a water pump (100) is installed on the water outlet pipe (10) for transporting condensed water in the water receiving box (7) to the surface of the condenser (31).

4. The refrigeration type range hood according to claim 1, characterized in that: When the air guide valve (6) is in the open state, the air outlet of the heat dissipation fan (32) is connected to the interior of the volute of the range fumes exhaust fan (11) through the ventilation hole (113); when the air guide valve (6) is in the closed state, the air outlet of the heat dissipation fan (32) is isolated from the interior of the volute of the range fumes exhaust fan (11).

5. The refrigeration type range hood according to claim 1, characterized in that: The air guide valve (6) is a rotary valve.

6. The refrigeration type range hood according to claim 1, characterized in that: The ventilation opening (113) is provided at the front section of the volute ring wall (112) and is close to the root of the volute tongue (114) of the range fumes exhaust fan (11), and the air guide valve (6) is rotatably connected to the front side edge of the ventilation opening (113).

7. The refrigeration type range hood according to claim 1, characterized in that: The range fumes suction fan (11) and the heat dissipation fan (32) are both centrifugal fans, and the central axis of the impeller of the range fumes suction fan (11) and the central axis of the impeller of the heat dissipation fan (32) are parallel to each other.

8. The refrigeration type range hood according to claim 7, characterized in that: The heat dissipation fan (32) is arranged above the range fumes exhaust fan (11), and the air outlet of the heat dissipation fan (32) faces downward and toward the ventilation port (113).

9. The refrigeration type range hood according to claim 8, characterized in that: Along the air flow direction, the heat dissipation fan (32) is arranged downstream of the condenser (31).

10. A control method for a refrigeration range hood, applied to the refrigeration range hood according to claim 2, the control method comprising the following steps: S1, air conditioning is turned on; S2. Determine the indoor temperature T, if T ≥ T H , then proceed to steps S3 and S4 in sequence; if T≤T L , then go to step S5-S8; if T L <T<T H , then proceed to steps S11 and S12; S3, the rotary valve is opened; S4, the heat dissipation fan (32) and the indoor fan (42) are both adjusted to a strong gear, and then the process proceeds to step S9; S5, the rotary valve is opened; S6, the cooling fan (32) and the indoor fan (42) are all adjusted to high gear; S7, determining whether the first float switch (91) is activated; If yes, proceed to step S8; If not, return to step S5; S8, reducing the air volume of the heat dissipation fan (32), and reducing the air volume of the internal unit fan (42); S9, determining whether the second float switch (92) is activated; If yes, the steam generating device (8) is turned on, and then the process proceeds to step S10; If not, return to step S8; S10, determining whether the steam generating device (8) is turned off; If yes, the process ends; If not, return to step S7; S11, rotary valve is opened; S12, the heat dissipation fan (32) and the indoor fan (42) are both adjusted to a low gear, and then the process proceeds to step S9.

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