A refrigeration oil extraction hood and a control method thereof

Abstract

The application discloses a kind of refrigeration range hood and its control method, the refrigeration range hood, comprising: oil fume suction module;Air conditioner module, comprising compressor, first evaporator and first condenser;And refrigerator cabinet module, comprising second evaporator;The refrigerator cabinet module further comprises second condenser, the compressor, first evaporator and first condenser constitute first set of refrigeration system, the compressor, second evaporator and second condenser constitute second set of refrigeration system, so that the air conditioner module and refrigerator cabinet module can simultaneously or individually work.

Description

Technical Field

[0001] This invention relates to an oil fume purification device, and more particularly to a refrigerated range hood and a control method for the refrigerated range hood. Background Technology

[0002] As living standards improve, people have higher expectations for their kitchen environments. Cooking involves using stoves and other appliances, generating significant heat in the kitchen and raising the overall temperature, thus reducing comfort. Currently, kitchen air conditioners or ceiling fans are commonly used to address the problem of stuffy kitchens in the summer. However, installation is often limited by ceiling-mounted systems, as some homes have fixed, non-removable ceilings, making it impossible to install dedicated kitchen air conditioners or ceiling fans.

[0003] In addition, to keep cooking seasonings fresh and store them for a long time, users store them in the refrigerator and take them out when needed. Storing seasonings in the refrigerator for preservation is cumbersome, especially since many users' refrigerators are located in the dining room, making the process of retrieving seasonings inconvenient and resulting in a poor user experience.

[0004] To address the aforementioned issues, solutions have been developed that integrate range hoods, air conditioners, and refrigerators into a single unit. For example, Chinese Patent Application No. 202020368932.2 discloses a kitchen air conditioning system, as does Chinese Patent Application No. 202021556547.7. Both systems include an air conditioning component, a range hood assembly, and a storage compartment. The air conditioning component and the storage compartment each have an evaporator, and both share a compressor and a condenser.

[0005] In such a system, the storage compartment cannot operate independently; it requires the air conditioning unit to be turned on to achieve cooling, resulting in high energy consumption and unreliable refrigeration performance.

[0006] Furthermore, some solutions for condensate generated by air conditioning systems involve opening holes in the exterior kitchen wall to drain the condensate outdoors via drain pipes. This can lead to corrosion of the exterior wall surface, affecting the building's appearance, and some building developers explicitly prohibit opening holes in the exterior walls. Other solutions involve installing water jets in the air conditioning system or directly pouring condensate onto the condenser, utilizing the heat of the high-temperature condenser to evaporate the condensate. However, this method has limited effectiveness. The highest operating temperature of the condenser in an air conditioning system is located at the condenser inlet, with an inlet temperature of 70℃~90℃, while the temperature of the condenser at other locations is typically below 50℃. Therefore, using the condenser to evaporate condensate is extremely ineffective, especially when the amount of condensate generated is large. Summary of the Invention

[0007] The first technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing a refrigeration range hood that can enable the refrigerator module to work independently as well as to work simultaneously with the air conditioning module, thereby ensuring refrigeration performance.

[0008] The second technical problem to be solved by the present invention is to provide a refrigerated range hood that efficiently utilizes condensate water and improves the heat exchange efficiency of the refrigerator module, addressing the problems existing in the prior art.

[0009] The third technical problem to be solved by the present invention is to provide a control method for the above-mentioned refrigeration range hood.

[0010] The technical solution adopted by the present invention to solve the first technical problem mentioned above is: a refrigerated range hood, comprising:

[0011] Fume extraction module;

[0012] An air conditioning module, including a compressor, a first evaporator, and a first condenser; and

[0013] The refrigerator module includes a second evaporator; characterized in that:

[0014] The refrigerator module also includes a second condenser. The compressor, the first evaporator, and the first condenser constitute a first refrigeration system, and the compressor, the second evaporator, and the second condenser constitute a second refrigeration system, so that the air conditioning module and the refrigerator module can work simultaneously or independently.

[0015] The air conditioning module and the refrigerator module share a compressor, and each has an independent evaporator and condenser, which allows the two modules to work simultaneously or independently. This avoids the problem of high power consumption caused by having to turn on the air conditioning module when only the refrigerator module needs to work, and also ensures sufficient power for the refrigerator module to work independently, thus guaranteeing the refrigeration performance.

[0016] To facilitate control of the refrigerant flow path and flow rate, the compressor outlet is connected to the first condenser and the second condenser respectively through the first conduit. Each condenser corresponds to one first conduit. A first three-way valve is provided at the junction of the two first conduits. The first three-way valve enables at least one of the passages from the compressor outlet to the two first conduits to be connected.

[0017] The compressor inlet is connected to the first evaporator and the second evaporator respectively through a second conduit. Each evaporator corresponds to one second conduit. A second three-way valve is provided at the junction of the two second conduits. The second three-way valve enables at least one of the passages from the compressor inlet to the two second conduits to be connected.

[0018] Preferably, the fume extraction module includes a main fan, and the first condenser is in the shape of a pipe and is located at the air outlet of the main fan, so that the fumes discharged by the main fan can dissipate heat from the first condenser.

[0019] Furthermore, to facilitate the collection of condensate generated during refrigeration, the fume extraction module includes a first housing and an oil cup located at the bottom of the first housing. The air conditioning module includes a second housing, which is located above the fume extraction module. The bottom of the first housing is also provided with a water storage box for collecting condensate generated by the first evaporator. The water storage box is located behind the oil cup, thereby preventing the water storage box from being exposed.

[0020] Furthermore, the second housing is provided with an air inlet and a cold air outlet. The air inlet is located at the top of the second housing, and the cold air outlet is located at the bottom front side of the second housing. The compressor, the first evaporator, and the first condenser are located inside the second housing, which allows the cold air outlet to be closer to the user, resulting in a better cooling experience.

[0021] The technical solution adopted by the present invention to solve the second technical problem mentioned above is as follows: the refrigerator module includes a third cabinet, and a heat exchange chamber is formed in the third cabinet so that the condensate generated by the first evaporator can flow in, and the second condenser is arranged in the heat exchange chamber.

[0022] The condensate from the air conditioning module is used to dissipate heat from the second condenser of the refrigerator module. This fully and efficiently utilizes the condensate and also allows the second condenser to dissipate heat well, thereby improving the refrigeration efficiency.

[0023] Furthermore, to facilitate the flow of condensate, a water receiving tray is provided below the first evaporator to receive the condensate generated by the first evaporator. A third conduit is connected to the bottom of the water receiving tray. A fourth conduit and a fifth conduit are also connected to the third conduit. The end of the fourth conduit extends into the heat exchange chamber and corresponds to the top of the heat exchange chamber. The fifth conduit also extends into the heat exchange chamber and corresponds to the bottom of the heat exchange chamber.

[0024] The refrigerated range hood also includes a water storage box, and the bottom of the third conduit extends into the water storage box.

[0025] To facilitate control of the condensate flow path, a third three-way valve is provided at the connection between the fourth and third conduits, and a fourth three-way valve is provided at the connection between the fifth and third conduits. The third three-way valve allows the passage between the upper and lower parts of the third conduit at the connection with the fourth conduit, and the passage between the third and fourth conduits, to be selectively connected. The fourth three-way valve allows the third conduit and the fifth conduit to be either closed or connected.

[0026] The first technical solution adopted by the present invention to solve the third technical problem mentioned above is: a control method for a refrigerated range hood, characterized by comprising the following steps:

[0027] 1) When the whole machine is powered on, the refrigeration function of the refrigerator module is turned on separately;

[0028] 2) When the compressor starts, the refrigerant flows to the second condenser of the refrigerator module by controlling the first three-way valve, and the refrigerant dissipates heat naturally in the second condenser.

[0029] 3) The refrigerant, after dissipating heat, flows to the second evaporator for refrigeration;

[0030] 4) After heat exchange in the second evaporator, the refrigerant flows to the compressor through the second three-way valve, thereby realizing the refrigerant circulation of the refrigerator module and achieving the refrigeration function.

[0031] The second technical solution adopted by the present invention to solve the third technical problem mentioned above is: a control method for a refrigerated range hood, characterized by comprising the following steps:

[0032] 1) When the whole unit is powered on, the refrigeration functions of the air conditioning module and the refrigerator module are turned on simultaneously;

[0033] 2) Fume extraction module;

[0034] 3) The compressor starts, causing the refrigerant to flow to the first condenser and the second condenser respectively. After heat exchange in each condenser, the refrigerant flows to the corresponding evaporator and then back to the compressor, realizing the cooling of the air conditioning module and the refrigerator module, and then proceeds to step 4).

[0035] Controlling the flow of condensate while achieving cooling:

[0036] 3.1) First, the condensate produced by the first evaporator can only enter the fourth conduit through the third conduit, and then enter the heat exchange chamber and accumulate in the heat exchange chamber, using the low temperature condensate to exchange heat with the second condenser.

[0037] 3.2) Check whether the amount of condensate in the heat exchange chamber has reached the preset critical value. If yes, proceed to step 3.3); otherwise, return to step 3.1.

[0038] 3.3) The condensate generated by the first evaporator is continuously replenished into the heat exchange chamber, and part of the condensate after heat exchange in the heat exchange chamber enters the third conduit through the fifth conduit, and then enters the water storage box.

[0039] 3.4) Detect the surface temperature of the second condenser. When the temperature drops below the preset temperature, adjust the refrigerant ratio so that the amount of refrigerant in the first refrigeration system remains unchanged, while the amount of refrigerant in the second refrigeration system decreases. If the surface temperature of the second condenser 33 does not drop below the preset temperature, keep the refrigerant ratio unchanged. Then proceed to step 4).

[0040] 4) The cooling function is turned off, and the condensate in the heat exchange chamber then flows completely into the water storage box and is drained.

[0041] Compared with the prior art, the advantages of this invention are as follows: the air conditioning module and the refrigerator module share a single compressor, and each has an independent evaporator and condenser, allowing the two modules to work simultaneously or independently. This avoids the problem of high power consumption caused by having to turn on the air conditioning module when only the refrigerator module needs to work, and also ensures sufficient power for the refrigerator module to work independently, thus guaranteeing refrigeration performance. The condensate from the air conditioning module is used to dissipate heat from the second condenser of the refrigerator module, making full and efficient use of the condensate and ensuring good heat dissipation for the second condenser, thereby improving refrigeration efficiency. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of a refrigerated range hood according to an embodiment of the present invention;

[0043] Figure 2 This is a side view of a refrigerated range hood according to an embodiment of the present invention;

[0044] Figure 3 This is a cross-sectional view of a refrigerated range hood according to an embodiment of the present invention;

[0045] Figure 4 This is a schematic diagram of the concealed portion of the refrigerated range hood according to an embodiment of the present invention;

[0046] Figure 5 This is a schematic diagram of the concealed portion of the refrigerated range hood according to an embodiment of the present invention;

[0047] Figure 6 This is a schematic diagram of the refrigeration components of the air conditioning module and the refrigerator module of the refrigerated range hood according to an embodiment of the present invention;

[0048] Figure 7 This is a schematic diagram of the refrigeration components of the air conditioning module and the refrigerator module of the refrigeration range hood according to an embodiment of the present invention (part of the housing of the first evaporator is hidden);

[0049] Figure 8 This is a flowchart illustrating the refrigeration control process of the refrigerator cabinet in an embodiment of the present invention.

[0050] Figure 9This is a flowchart illustrating the simultaneous operation control of the air conditioning component and the refrigerator in a refrigerated range hood according to an embodiment of the present invention. Detailed Implementation

[0051] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions.

[0052] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this invention can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0053] See Figures 1 to 7 A refrigerated range hood includes a fume extraction module 1, an air conditioning module 2, and a refrigerator module 3. The fume extraction module 1 includes a first housing 11, the air conditioning module 2 includes a second housing 21, and the refrigerator module 3 includes a third housing 31. The second housing 21 and the third housing 31 can be respectively mounted on the fume extraction module 1, such as on top of the fume extraction module 1. The second housing 21 and the third housing 31 are arranged side-by-side, as shown in the figure, in a left-right side-by-side arrangement.

[0054] A smoke inlet (not shown) is formed on the first housing 11. In this embodiment, it is located on the front side of the first housing 11, forming a side-suction type range hood. Optionally, the smoke extraction module 1 can also be any existing form such as top-suction or low-suction. A main fan 12 is installed inside the first housing 11. The main fan 12 is usually a centrifugal fan. An oil cup 13 is installed at the bottom of the first housing 11, and a smoke baffle 14 is installed on the front side of the first housing 11, which can open and close the smoke inlet.

[0055] The second housing 21 of the air conditioning module 2 has an air inlet 221 and a cold air outlet 222. In this embodiment, the air inlet 221 is located at the top of the second housing 21, and the cold air outlet 222 is located at the bottom front side of the second housing 21, so that the airflow is closer to the user and provides a better cooling experience. The second housing 21 houses a compressor 23, a first evaporator 24, a first condenser 25, and a cooling fan 26. The refrigerant flow and refrigeration principle between the compressor 23, the first evaporator 24, and the first condenser 25 are the same as in the prior art. Preferably, the first evaporator 24 is located adjacent to the air inlet 221. The cooling fan 26 draws in ambient temperature air from the kitchen through the air inlet 221. After heat exchange with the first evaporator 24, the ambient temperature air is blown out through the cooling fan 26 from the cold air outlet 222, achieving cooling. The cooling fan 26 can also be a centrifugal fan, with its air inlet facing the first evaporator 24. When the cooling fan 26 is working, room temperature air is drawn in from the air inlet 221, exchanges heat with the first evaporator 24 first, and then enters the cooling fan 26. The direction of airflow can then be controlled.

[0056] Since the cold air outlet 222 is located at the bottom of the second housing 21, and the cooling fan 26 is located near the top of the second housing 21, a guide 27 is provided between the air outlet of the cooling fan 26 and the cold air outlet 222 to guide the cold air from the cooling fan 26 to the cold air outlet 222.

[0057] The first condenser 25 is located at the air outlet of the main fan 12 of the fume extraction module 1. It can be a blow-type condenser, with an overall pipe-like shape. Specific structures can be found in Chinese patents with application numbers 202410511949.1, 202322681671.6, and 202322669089.8, which will not be elaborated here. More preferably, it uses an inward-rolling condenser, particularly as disclosed in Chinese patent application number 202410511949.1. This allows the high-speed airflow exhausted from the fume extraction module 1 to dissipate heat from the first condenser 25, resulting in high heat exchange efficiency.

[0058] When the air conditioning module 2 is working, the first evaporator 24 will produce a large amount of low-temperature condensate. Therefore, a water receiving tray 28 is provided below the first evaporator 24 to collect the condensate produced by the first evaporator 24.

[0059] The third compartment 31 of the refrigerator module 3 is equipped with a second evaporator 32 and a second condenser 33. Preferably, the second evaporator 32 is a wire-tube evaporator, and the second condenser 33 is a wire-tube condenser. When the air conditioning module 2 is not working, the second condenser 33 uses natural air heat exchange; when the air conditioning module 2 is working, it uses the low-temperature condensate from the air conditioning module 2 for water-cooled heat exchange, resulting in good heat exchange efficiency. Details will be provided below. The refrigerator module 3 can be used to store items 100 that require refrigeration, such as cooking condiments, which helps to preserve the condiments for a longer period, or fruits and vegetables.

[0060] The compressor 23, first evaporator 24, and first condenser 25 of the air conditioning module 2, and the second evaporator 32 and second condenser 33 of the refrigerator module 3 together constitute the refrigeration assembly. The first evaporator 24, first condenser 25, second evaporator 32, and second condenser 33 share the same compressor 23. The refrigerant flow and refrigeration principle between the compressor 23, second evaporator 32, and second condenser 33 are also the same as in the prior art. The outlet of the compressor 23 is connected to the first condenser 25 and the second condenser 33 respectively through the first conduit 231. Each condenser corresponds to one first conduit 231. A first three-way valve 232 is provided at the junction of the two first conduits 231. The first three-way valve 232 can connect one or both of the passages from the outlet of the compressor 23 to the two first conduits 231. The inlet of compressor 23 is connected to the first evaporator 24 and the second evaporator 32 via second conduits 233. Each evaporator corresponds to one second conduit 233. A second three-way valve 234 is provided at the junction of the two second conduits 233. The second three-way valve 234 can connect one or both of the passages from the inlet of compressor 23 to the two second conduits 233. Refrigerant flows in the first conduit 231 and the second conduit 233. By controlling the first three-way valve 232 and the second three-way valve 234, the flow path of the refrigerant can be changed, so that one compressor 23 can drive two refrigeration systems (compressor 23, first evaporator 24 and first condenser 25 constitute the first refrigeration system, compressor 23, second evaporator 32 and second condenser 33 constitute the second refrigeration system. Throttling valves and other components required for the refrigeration system are not shown in the figure and are existing technology) to work separately or simultaneously. This method is low in cost and simple in structure.

[0061] See Figure 8 The refrigeration control process of refrigerator module 3 is shown, including the following steps:

[0062] 1) When the whole machine is powered on, the refrigeration function of the refrigerator module 3 is turned on separately. For example, an independent switch can be set on the third cabinet 31 of the refrigerator module 3, or a control panel for controlling the whole machine can be set on the smoke baffle 14 of the fume extraction module 1 for selection.

[0063] 2) When the compressor 23 starts, it controls the first three-way valve 232 to make the refrigerant flow to the second condenser 33 of the refrigerator module 3, and the refrigerant dissipates heat naturally in the second condenser 33.

[0064] 3) The refrigerant after heat dissipation flows to the second evaporator 32 for refrigeration;

[0065] 4) The refrigerant after heat exchange in the second evaporator 32 flows to the compressor 23 through the second three-way valve 234, thereby realizing the refrigerant circulation of the refrigerator module 3 and realizing the refrigeration function.

[0066] A third conduit 281 is connected to the bottom of the drip tray 28. A fourth conduit 282 and a fifth conduit 283 are also connected to the third conduit 281. A heat exchange chamber 311 is formed inside the third housing 31, and the aforementioned second condenser 33 is placed within this heat exchange chamber 311, which is a sandwich structure. The fourth conduit 282 is located above the fifth conduit 283, and its end extends into the heat exchange chamber 311, corresponding to the top of the chamber, serving as a water inlet. The fifth conduit 283 also extends into the heat exchange chamber 311, corresponding to the bottom, serving as a water outlet. Thus, the low-temperature condensate from the drip tray 28 can flow into the heat exchange chamber 311 to exchange heat with the second condenser 33, thereby improving the heat exchange efficiency of the refrigerator module 3. A third three-way valve 284 is installed at the connection between the fourth conduit 282 and the third conduit 281, and a fourth three-way valve 285 is installed at the connection between the fifth conduit 283 and the third conduit 281. The third three-way valve 284 allows selective connection of the passage between the upper and lower parts of the third conduit 281 at the connection with the fourth conduit 282, and the passage between the third conduit 281 and the fourth conduit 282 (that is, the condensate flowing down the part of the third conduit 281 above the fourth conduit 282 flows directly downwards or enters the fourth conduit 282). The fourth three-way valve 285 closes or connects the third conduit 281 and the fifth conduit 283. The condensate flowing in the third conduit 281, the fourth conduit 282, and the fifth conduit 283 can be changed by controlling the third three-way valve 284 and the fourth three-way valve 285.

[0067] The refrigerated range hood also includes a water storage box 29, which is located at the bottom of the first housing 11 of the fume extraction module 1 and behind the oil cup 13. The height and length of the water storage box 29 are adapted to the oil cup 13, forming a concealed design. The bottom of the aforementioned third conduit 281 extends into the water storage box 29, thereby achieving the storage of condensate while maintaining the overall appearance of the machine.

[0068] See Figure 9 The diagram illustrates the refrigeration control process of air conditioning module 2 and refrigerator module 3, including the following steps:

[0069] 1) When the whole unit is powered on, the refrigeration functions of the air conditioning module 2 and the refrigerator module 3 are turned on at the same time. For example, independent switches can be set on the second box 21 of the air conditioning module 2 and the third box 31 of the refrigerator module 3, or a control panel for controlling the whole unit can be set on the smoke baffle 14 of the fume extraction module 1.

[0070] 2) The fume extraction module 1 starts to work normally, such as opening the smoke baffle 14 at a certain angle to open the smoke inlet, and the main fan 12 of the fume extraction module 1 operates at the specified speed.

[0071] 3) The compressor 23 starts and controls the first three-way valve 232, so that the refrigerant flows to the first condenser 25 and the second condenser 33 respectively. The refrigerant flow to the first condenser 25 is greater than the refrigerant flow to the second condenser 33. The flow ratio can be 5:1. After heat exchange in each condenser, the refrigerant flows to the corresponding evaporator and then flows back to the compressor 23, realizing the cooling of the air conditioning module 2 and the refrigerator module 3. Then proceed to step 4).

[0072] While achieving refrigeration, control the third three-way valve 284 and the fourth three-way valve 285:

[0073] 3.1) First, the condensate produced by the first evaporator 24 can only enter the fourth conduit 282 through the third conduit 281. That is, the third three-way valve 284 is controlled to close the passage between the upper and lower parts of the third conduit 281 at the connection with the fourth conduit 282, and open the passage between the third conduit 281 and the fourth conduit 282, so that the condensate enters the heat exchange chamber 311 and uses the low-temperature condensate to exchange heat with the second condenser 33, thereby improving the heat exchange efficiency of the refrigerator module 3. And the fourth three-way valve 285 is controlled to close the passage between the third conduit 281 and the fifth conduit 283, so that the condensate accumulates in the heat exchange chamber 311 and the water level gradually rises.

[0074] 3.2) Check whether the amount of condensate in the heat exchange chamber 311 has reached the preset critical value. This can be done by a liquid level sensor. The critical value can be set as needed, such as the water level reaching 2 / 3 of the overall height of the heat exchange chamber 311. The purpose is to prevent excessive condensate from being replenished. If yes, proceed to step 3.3); otherwise, return to step 3.1.

[0075] 3.3) Control the fourth three-way valve 285 to open, so that the condensate produced by the first evaporator 24 is continuously replenished into the heat exchange chamber 311, and part of the condensate after heat exchange in the heat exchange chamber 311 enters the third pipe 281 through the fifth pipe 283 below, and then enters the water storage box 29.

[0076] 3.4) Detect the surface temperature of the second condenser 33. When the temperature drops below the preset temperature (e.g., below 60°C), adjust the refrigerant ratio, such as to 8:1, so that the amount of refrigerant in the first refrigeration system remains unchanged, while the amount of refrigerant in the second refrigeration system decreases. The total amount of refrigerant can be adjusted by the output of the compressor 23 (changing the speed of the compressor 23 to change the total amount of refrigerant). If the surface temperature of the second condenser 33 does not drop below the preset temperature, keep the refrigerant ratio unchanged.

[0077] Then proceed to step 4);

[0078] 4) When cooking is finished, or according to user needs, the cooling function is turned off, and the fourth three-way valve 285 is then in the normally open state, so that the condensate in the heat exchange chamber 311 flows completely to the water storage box 29 and is drained, preventing water accumulation in the heat exchange chamber 311 and the growth of bacteria.

Claims

1. A refrigerated range hood, comprising: Oil fume extraction module (1); An air conditioning module (2) includes a compressor (23), a first evaporator (24), and a first condenser (25); and The refrigerator module (3) includes a second evaporator (32); characterized in that: The refrigerator module (3) also includes a second condenser (33). The compressor (23), the first evaporator (24) and the first condenser (25) constitute a first refrigeration system. The compressor (23), the second evaporator (32) and the second condenser (33) constitute a second refrigeration system. Thus, the air conditioning module (2) and the refrigerator module (3) can work simultaneously or independently.

2. The refrigerated range hood according to claim 1, characterized in that: The outlet of the compressor (23) is connected to the first condenser (25) and the second condenser (33) respectively through the first conduit (231). Each condenser corresponds to one first conduit (231). A first three-way valve (232) is provided at the junction of the two first conduits (231). The first three-way valve (232) enables at least one of the passages from the outlet of the compressor (23) to the two first conduits (231) to be connected. The inlet of the compressor (23) is connected to the first evaporator (24) and the second evaporator (32) respectively through the second conduit (233). Each evaporator corresponds to one second conduit (233). A second three-way valve (234) is provided at the junction of the two second conduits (233). The second three-way valve (234) enables at least one of the passages from the inlet of the compressor (23) to the two second conduits (233) to be connected.

3. The refrigerated range hood according to claim 1 or 2, characterized in that: The fume extraction module (1) includes a main fan (12), and the first condenser (25) is in the shape of a pipe and is located at the air outlet of the main fan (12).

4. The refrigerated range hood according to claim 1 or 2, characterized in that: The fume extraction module (1) includes a first housing (11) and an oil cup (13) disposed at the bottom of the first housing (11). The air conditioning module (2) includes a second housing (21) disposed above the fume extraction module (1). The bottom of the first housing (11) is also provided with a water storage box (29) for receiving the condensate generated by the first evaporator (24). The water storage box (29) is disposed on the rear side of the oil cup (13).

5. The refrigerated range hood according to claim 4, characterized in that: The second housing (21) is provided with an air inlet (221) and a cold air outlet (222). The air inlet (221) is located at the top of the second housing (21), and the cold air outlet (222) is located at the bottom front side of the second housing (21). The compressor (23), the first evaporator (24) and the first condenser (25) are located inside the second housing (21).

6. The refrigerated range hood according to claim 1 or 2, characterized in that: The refrigerator module (3) includes a third cabinet (31), and a heat exchange chamber (311) is formed inside the third cabinet (31) to allow condensate generated by the first evaporator (24) to flow in. The second condenser (33) is disposed inside the heat exchange chamber (311).

7. The refrigerated range hood according to claim 6, characterized in that: A water receiving tray (28) for receiving condensate generated by the first evaporator (24) is provided below the first evaporator (24). A third conduit (281) is connected to the bottom of the water receiving tray (28). A fourth conduit (282) and a fifth conduit (283) are also connected to the third conduit (281). The end of the fourth conduit (282) extends into the heat exchange chamber (311) and corresponds to the top of the heat exchange chamber (311). The fifth conduit (283) also extends into the heat exchange chamber (311) and corresponds to the bottom of the heat exchange chamber (311). The refrigerated range hood also includes a water storage box (29), and the bottom of the third conduit (281) extends into the water storage box (29).

8. The refrigerated range hood according to claim 7, characterized in that: A third three-way valve (284) is provided at the connection between the fourth conduit (282) and the third conduit (281), and a fourth three-way valve (285) is provided at the connection between the fifth conduit (283) and the third conduit (281). The third three-way valve (284) allows the passage between the upper and lower parts of the third conduit (281) at the connection with the fourth conduit (282) and the passage between the third conduit (281) and the fourth conduit (282) to be selectively connected. The fourth three-way valve (285) allows the third conduit (281) and the fifth conduit (283) to be closed or connected.

9. A control method for a refrigerated range hood as described in claim 2, characterized in that: Includes the following steps: 1) When the whole machine is powered on, the refrigeration function of the refrigerator module (3) is turned on separately; 2) The compressor (23) starts and controls the first three-way valve (232) to make the refrigerant flow to the second condenser (33) of the refrigerator module (3), and the refrigerant dissipates heat naturally in the second condenser (33); 3) The refrigerant after heat dissipation flows to the second evaporator (32) for refrigeration; 4) The refrigerant after heat exchange in the second evaporator (32) flows to the compressor (23) through the second three-way valve (234), thereby realizing the refrigerant circulation of the refrigerator module (3) and realizing the refrigeration function.

10. A control method for a refrigerated range hood as described in claim 7 or 8, characterized in that: Includes the following steps: 1) When the whole machine is powered on, the refrigeration functions of the air conditioning module (2) and the refrigerator module (3) are turned on simultaneously; 2) Fume extraction module (1); 3) The compressor (23) is started, so that the refrigerant flows to the first condenser (25) and the second condenser (33) respectively. After heat exchange in each condenser, the refrigerant flows to the corresponding evaporator and then flows back to the compressor (23) to realize the cooling of the air conditioning module (2) and the refrigerator module (3), and then proceeds to step 4). Controlling the flow of condensate while achieving cooling: 3.1) First, the condensate produced by the first evaporator (24) can only enter the fourth conduit (282) through the third conduit (281), and then enter the heat exchange chamber (311) and accumulate in the heat exchange chamber (311), using the low temperature condensate to exchange heat with the second condenser (33); 3.2) Check whether the amount of condensate in the heat exchange chamber (311) has reached the preset critical value. If yes, proceed to step 3.3); otherwise, return to step 3.

1. 3.3) The condensate generated by the first evaporator (24) is continuously replenished into the heat exchange chamber (311), and part of the condensate after heat exchange in the heat exchange chamber (311) enters the third conduit (281) through the fifth conduit (283), and then enters the water storage box (29); 3.4) Detect the surface temperature of the second condenser (33). When the temperature drops below the preset temperature, adjust the refrigerant ratio so that the amount of refrigerant in the first refrigeration system remains unchanged, while the amount of refrigerant in the second refrigeration system decreases. If the surface temperature of the second condenser (33) does not drop below the preset temperature, keep the refrigerant ratio unchanged. Then proceed to step 4); 4) The cooling function is turned off, and thereafter the condensate in the heat exchange chamber (311) flows completely into the water storage box (29) and is drained.

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