Compound refrigeration oil fume extractor device, compound refrigeration cycle system and refrigeration method

Abstract

The application relates to a composite refrigeration range hood device, a composite refrigeration cycle system and a refrigeration method. The composite refrigeration range hood device can increase the refrigerating capacity of a vapor compression refrigeration module, improve the refrigeration energy efficiency ratio of the vapor compression refrigeration module, and simultaneously realize waste heat recovery and utilization of flue gas, improve energy utilization efficiency, and particularly can meet the refrigeration and cooling demand of the indoor environment of a kitchen during the cooking peak period in the summer high-temperature period.

Description

Technical Field

[0001] This application relates to the field of waste heat recovery technology, and in particular to a composite refrigeration range hood device, a composite refrigeration cycle system, and a refrigeration method. Background Technology

[0002] With kitchen spaces becoming increasingly compact and aesthetic demands rising, traditional split-type range hoods and air conditioners can no longer meet users' dual needs for cleanliness and comfort. Therefore, integrated cooling and fume extraction products have emerged on the market, aiming to solve the problems of high temperatures and stuffiness in the kitchen during cooking, while maintaining a tidy and aesthetically pleasing environment.

[0003] In related technologies, air conditioning range hoods have the following problems: First, the temperature in the kitchen is usually relatively high. Due to the integrated assembly structure of the air conditioning range hood, the heat from the exhaust gas and the heat released by the motor and compressor are concentrated near the air conditioner, resulting in a high ambient temperature near the condenser and difficulty in heat exchange. Second, air conditioning range hoods usually use a single vapor compression refrigeration cycle system. The refrigeration efficiency and capacity of this cycle system are highly dependent on the condensing temperature. According to thermodynamic principles, a higher ambient temperature near the condenser leads to a higher condensing temperature, an increased compressor pressure ratio, and a higher exhaust temperature, resulting in a significant increase in power consumption per unit of cooling capacity and a sharp drop in the Coefficient of Performance (COP). Third, the cooking process generates a large amount of high-temperature fumes and steam, which contain usable waste heat. In related technologies, air conditioning range hoods treat this heat as waste heat and discharge it directly, resulting in low energy utilization efficiency.

[0004] In summary, among the relevant technologies, air-conditioning range hoods are not effective in cooling the indoor environment of the kitchen and have high energy consumption. Especially during the peak cooking period in summer, the cooling effect of air-conditioning range hoods is significantly reduced, the air outlet temperature is not cool enough, and the system power consumption increases. In addition, air-conditioning range hoods do not effectively utilize the waste heat of flue gas, resulting in low energy efficiency. Summary of the Invention

[0005] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application provides a composite refrigeration range hood device, a composite refrigeration cycle system, and a refrigeration method, which can increase the cooling capacity of the vapor compression refrigeration module and improve the refrigeration energy efficiency ratio of the vapor compression refrigeration module while keeping the compressor power consumption basically unchanged. At the same time, it can realize the recovery and utilization of waste heat from the flue gas, improve energy utilization efficiency, and can especially meet the cooling and temperature reduction needs of the kitchen indoor environment during the peak cooking period in summer.

[0006] In a first aspect, this application provides a composite refrigeration range hood device, comprising:

[0007] The range hood module has a flue gas outlet for discharging flue gas;

[0008] The coupling module includes a recooler having a hot-side flow channel and a cold-side flow channel capable of exchanging heat with each other;

[0009] The vapor compression refrigeration module includes a compressor, a first condenser, a first throttling valve, and an evaporator connected in sequence. The first condenser is connected to the first throttling valve through the hot side flow channel. The vapor compression refrigeration module has a cold air vent that communicates with the indoor environment.

[0010] An absorption refrigeration module includes a generator, a second condenser, a second throttle valve, an absorber, and a circulating pump. The refrigerant outlet of the generator, the second condenser, the second throttle valve, the cold side flow channel, the refrigerant inlet of the absorber, the working fluid pair outlet of the absorber, the circulating pump, and the working fluid pair inlet of the generator are connected in sequence, and the absorbent outlet of the generator is connected to the absorbent inlet of the absorber.

[0011] The heat source inlet of the generator is connected to the flue gas outlet.

[0012] The composite refrigeration range hood device according to the first aspect of this application has at least the following beneficial effects:

[0013] The composite refrigeration range hood device of this application, through the coordinated arrangement of a range hood module, a coupling module, a vapor compression refrigeration module, and an absorption refrigeration module, couples the flue gas outlet of the range hood module with the heat source inlet of the generator of the absorption refrigeration module. This allows the high-temperature flue gas generated by the range hood module to serve as the driving heat source for the absorption refrigeration module, utilizing the waste heat from the flue gas to drive the absorption refrigeration module in a refrigeration cycle. Simultaneously, the recooler of the coupling module couples the refrigeration cycles of the vapor compression refrigeration module and the absorption refrigeration module. Through the heat exchange-capable hot-side and cold-side flow channels built into the recooler, the vapor compression refrigeration module... The refrigeration cycle and the absorption refrigeration module exchange heat, allowing the low-pressure, low-temperature gas-liquid mixture refrigerant generated by the absorption refrigeration module to cool the high-temperature, high-pressure liquid refrigerant generated by the vapor compression refrigeration module. This achieves deep subcooling of the high-temperature, high-pressure liquid refrigerant in the vapor compression refrigeration module, increasing the cooling capacity of the vapor compression refrigeration module and improving its refrigeration efficiency ratio while keeping the compressor power consumption basically unchanged. At the same time, it realizes the recovery and utilization of waste heat from flue gas, improving energy utilization efficiency. It is particularly able to meet the cooling and temperature reduction needs of the kitchen environment during the peak cooking season in summer.

[0014] In some embodiments, the hot-side flow channel and the cold-side flow channel are fitted together but not connected, and the hot-side flow channel and the cold-side flow channel exchange heat through a partition wall.

[0015] With this configuration, the low-pressure, low-temperature gas-liquid mixture refrigerant in the cold-side channel and the high-temperature, high-pressure liquid refrigerant in the hot-side channel do not come into direct contact. Heat is conducted only through the closely fitting partition between the two channels. The low-pressure, low-temperature gas-liquid mixture refrigerant in the cold-side channel absorbs heat from the high-temperature, high-pressure liquid refrigerant in the hot-side channel, transforming into a low-temperature, low-pressure gaseous refrigerant. This fully utilizes the cooling capacity generated by the absorption refrigeration module to deeply subcool the high-temperature, high-pressure liquid refrigerant in the hot-side channel, further distancing the high-temperature, high-pressure liquid state point from the gas-liquid two-phase region. This ensures that the high-temperature, high-pressure liquid refrigerant in the hot-side channel becomes a completely single-phase liquid refrigerant before flowing into the first throttling valve. This increases the cooling capacity of the vapor compression refrigeration module and improves its refrigeration efficiency ratio. At the same time, it prevents the low-pressure, low-temperature gas-liquid mixture refrigerant in the cold-side channel from mixing and contaminating the high-temperature, high-pressure liquid refrigerant in the hot-side channel, ensuring that the vapor compression refrigeration module and the absorption refrigeration module operate independently and stably.

[0016] In some embodiments, the absorption refrigeration module further includes a regulating valve connected between the absorbent outlet of the generator and the absorbent inlet of the absorbent.

[0017] This configuration allows for real-time adjustment of the flow rate of the concentrated absorbent solution output from the generator to the absorber via a regulating valve. This matches the absorber's operating conditions, helps balance the working fluid circulation ratio between the absorber and the generator, avoids excessive or insufficient supply of the concentrated absorbent solution, and effectively stabilizes the absorption reaction process inside the absorber.

[0018] In some embodiments, the vapor compression refrigeration module further includes a first centrifugal fan, the outlet of which faces the first condenser.

[0019] This configuration creates a forced convection airflow towards the first condenser, continuously sweeping its surface and accelerating heat dissipation. This allows the first condenser to quickly condense the high-temperature, high-pressure gaseous refrigerant into a high-temperature, high-pressure liquid refrigerant, rapidly dissipating the heat released by the gaseous refrigerant. This helps to reduce heat accumulation in the first condenser and the interior of the unit, improving the heat exchange efficiency of the first condenser and further enhancing the cooling efficiency ratio of the vapor compression refrigeration module.

[0020] In some embodiments, the outlet end of the first centrifugal fan also faces the second condenser and the absorber, the second condenser and the absorber being offset relative to the outlet end of the first centrifugal fan, and the first condenser and the second condenser being offset relative to the outlet end of the first centrifugal fan.

[0021] This configuration ensures that the outlet of the first centrifugal fan faces the first condenser, the second condenser, and the absorber simultaneously. Furthermore, the first condenser, the second condenser, and the absorber are staggered relative to the outlet of the first centrifugal fan, allowing the airflow from the first centrifugal fan to cover all three components. This enables the airflow from the first centrifugal fan to dissipate heat more evenly to the first condenser, the second condenser, and the absorber, reducing their operating temperatures, stabilizing the operation of the vapor compression refrigeration module and the absorption refrigeration module, and further improving the refrigeration efficiency ratio of the vapor compression refrigeration module.

[0022] In some embodiments, the composite refrigeration range hood device further includes a spray module, which includes a water collection tank, a splash impeller, and a driving component. The splash impeller is at least partially disposed in the water collection tank, and the driving component is used to drive the splash impeller to rotate so that the condensate in the water collection tank forms spray water. The first condenser, the second condenser, and the absorber are all located within the spray range of the spray water.

[0023] With this configuration, the driving component drives the splash impeller to rotate, disturbing and dispersing the condensate collected in the water collection tank to form a spray mist. The first condenser, the second condenser, and the absorber are all within the spray coverage area. Based on the forced convection cooling provided by the first centrifugal fan, the spray cooling provided by the spray module can be superimposed, rapidly reducing the operating temperature of the first condenser, the second condenser, and the absorber, stabilizing the operating conditions of the vapor compression refrigeration module and the absorption refrigeration module, and further improving the refrigeration efficiency ratio of the vapor compression refrigeration module.

[0024] In some embodiments, the vapor compression refrigeration module further includes a second centrifugal fan, the outlet of which faces the evaporator.

[0025] This configuration creates a forced convection airflow towards the evaporator, continuously sweeping the evaporator surface and accelerating the heat exchange between the airflow and the low-temperature, low-pressure gas-liquid mixture refrigerant inside the evaporator. This quickly removes heat from the kitchen's indoor environment, enhances the evaporator's heat absorption effect, increases the volume of cold air output, and improves the cooling effect on the kitchen's indoor environment.

[0026] In some embodiments, the range hood module further includes a first temperature sensor located at the flue gas outlet to detect the temperature of the flue gas; the composite refrigeration range hood device further includes a control module, which is communicatively connected to the first temperature sensor, the compressor, and the circulation pump.

[0027] With this setup, the first temperature sensor at the flue gas outlet collects the temperature of the flue gas generated by the range hood module in real time and feeds it back to the control module. Based on the flue gas temperature, the control module intelligently judges the heat load of the kitchen indoor environment and the waste heat level of the flue gas, and adaptively adjusts the compressor operating frequency and start / stop, the speed and start / stop of the first centrifugal fan, the speed and start / stop of the second centrifugal fan, the speed and start / stop of the drive components, and the operating power and pumping flow of the circulating pump.

[0028] Secondly, this application provides a composite refrigeration cycle system, which includes the composite refrigeration range hood device described above.

[0029] The composite refrigeration cycle system according to the second aspect of this application has at least the following beneficial effects:

[0030] The composite refrigeration cycle system of this application, because it is equipped with the aforementioned composite refrigeration range hood device, also has the same technical effects brought by the composite refrigeration range hood device, that is, it can increase the cooling capacity of the vapor compression refrigeration module and improve the cooling energy efficiency ratio of the vapor compression refrigeration module while keeping the compressor power consumption basically unchanged. At the same time, it can realize the recovery and utilization of waste heat of flue gas, improve energy utilization efficiency, and can especially meet the cooling and cooling needs of the kitchen indoor environment during the peak cooking period in summer.

[0031] Thirdly, this application provides a refrigeration method, which is implemented using the aforementioned composite refrigeration range hood device, and the refrigeration method includes the following steps:

[0032] Step S100: Detect the flue gas temperature at the flue gas outlet and the indoor ambient temperature;

[0033] Step S200: When the flue gas temperature at the flue gas outlet is less than the first preset temperature and the indoor ambient temperature is less than the second preset temperature, control the circulation pump to turn off; when the flue gas temperature at the flue gas outlet is greater than or equal to the first preset temperature, or the indoor ambient temperature is greater than or equal to the second preset temperature, control the circulation pump to turn on.

[0034] The refrigeration method according to the third aspect of this application has at least the following beneficial effects:

[0035] When the first temperature sensor detects that the flue gas temperature is lower than the first preset temperature, and the second temperature sensor detects that the indoor ambient temperature is lower than the second preset temperature, it indicates that the heat load of the kitchen indoor environment is low and the overall ambient temperature of the device is not high. At this time, the individual refrigeration cycle of the vapor compression refrigeration module can meet the cooling and temperature reduction requirements of the kitchen indoor environment. The control module shuts down the circulation pump, causing the absorption refrigeration module to stop the refrigeration cycle. At the same time, it reasonably reduces the compressor operating frequency, the speed of the first centrifugal fan, the speed of the second centrifugal fan, and the speed of the drive components to reduce ineffective energy consumption.

[0036] When the first temperature sensor detects that the flue gas temperature is greater than or equal to the first preset temperature, or when the second temperature sensor detects that the indoor ambient temperature is greater than or equal to the second preset temperature, it indicates that the heat load of the kitchen indoor environment is high and the overall ambient temperature of the device is high. At this time, the control module starts the circulation pump, so that the absorption refrigeration module performs refrigeration cycle driven by the heat source of the waste heat of the flue gas. Through the deep subcooling effect of the low-pressure, low-temperature gas-liquid mixture refrigerant in the cold side channel of the recooler on the high-temperature, high-pressure liquid refrigerant in the hot side channel, the cooling capacity of the vapor compression refrigeration module is increased while the power consumption of the compressor remains basically unchanged, thereby improving the refrigeration energy efficiency ratio of the vapor compression refrigeration module. At the same time, the waste heat of the flue gas is recovered and utilized, improving energy utilization efficiency. In particular, it can meet the cooling and cooling needs of the kitchen indoor environment during the peak cooking period in summer.

[0037] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0038] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0039] Figure 1 This is a schematic diagram of the structure of the composite refrigeration range hood device according to an embodiment of this application.

[0040] Figure 2 This is a diagram of the refrigeration cycle system of the composite refrigeration range hood device according to an embodiment of this application.

[0041] Figure 3 This is a diagram of another refrigeration cycle system of the composite refrigeration range hood device according to an embodiment of this application.

[0042] Figure 4This is a partial structural diagram of the composite refrigeration range hood device according to an embodiment of this application. Figure 1 .

[0043] Figure 5 This is a partial structural diagram of the composite refrigeration range hood device according to an embodiment of this application. Figure 2 .

[0044] Figure 6 for Figure 5 A magnified view of a portion of point A in the middle.

[0045] Figure 7 for Figure 5 A magnified view of a section at point B.

[0046] Figure 8 This is a partial structural diagram of the composite refrigeration range hood device according to an embodiment of this application. Figure 3 .

[0047] Figure 9 This is a partial structural diagram of the composite refrigeration range hood device according to an embodiment of this application. Figure 4 .

[0048] Figure 10 This is a partial structural diagram of the composite refrigeration range hood device according to an embodiment of this application. Figure 5 .

[0049] Figure 11 This is a partial structural diagram of the composite refrigeration range hood device according to an embodiment of this application. Figure 6 .

[0050] Explanation of reference numerals in the attached drawings: Body 10; First air inlet 11; Second air inlet 12; Terminal exhaust pipe 13; Smoke hood module 100; Flue gas outlet 110; Recooler 200; Hot side flow channel 210; Cold side flow channel 220; Vapor compression refrigeration module 300; Compressor 310; First condenser 320; First throttling valve 330; Evaporator 340; Cold air outlet 350; First centrifugal fan 360; Second centrifugal fan 370; Absorption refrigeration module 400; Generator 410; Refrigerant outlet 411; Absorbent outlet 412; Working fluid inlet 413; Second condenser 420; Second throttling valve 430; Absorber 440; Refrigerant inlet 441; Absorbent inlet 442; Working fluid outlet 443; Circulation pump 450; Regulating valve 460; Splash impeller 500. Detailed Implementation

[0051] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0052] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0053] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0054] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0055] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0056] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0057] With kitchen spaces becoming increasingly compact and aesthetic demands rising, traditional split-type range hoods and air conditioners can no longer meet users' dual needs for cleanliness and comfort. Therefore, integrated cooling and fume extraction products have emerged on the market, aiming to solve the problems of high temperatures and stuffiness in the kitchen during cooking, while maintaining a tidy and aesthetically pleasing environment.

[0058] In related technologies, air conditioning range hoods have the following problems: First, the temperature in the kitchen is usually relatively high. Due to the integrated assembly structure of the air conditioning range hood, the heat from the exhaust gas and the heat released by the motor and compressor are concentrated near the air conditioner, resulting in a high ambient temperature near the condenser and difficulty in heat exchange. Second, air conditioning range hoods usually use a single vapor compression refrigeration cycle system. The refrigeration efficiency and capacity of this cycle system are highly dependent on the condensing temperature. According to thermodynamic principles, a higher ambient temperature near the condenser leads to a higher condensing temperature, an increased compressor pressure ratio, and a higher exhaust temperature, resulting in a significant increase in power consumption per unit of cooling capacity and a sharp drop in the Coefficient of Performance (COP). Third, the cooking process generates a large amount of high-temperature fumes and steam, which contain usable waste heat. In related technologies, air conditioning range hoods treat this heat as waste heat and discharge it directly, resulting in low energy utilization efficiency.

[0059] In summary, among the relevant technologies, air-conditioning range hoods are not effective in cooling the indoor environment of the kitchen and have high energy consumption. Especially during the peak cooking period in summer, the cooling effect of air-conditioning range hoods is significantly reduced, the air outlet temperature is not cool enough, and the system power consumption increases. In addition, air-conditioning range hoods do not effectively utilize the waste heat of flue gas, resulting in low energy efficiency.

[0060] Based on this, one or more embodiments of this application provide a composite refrigeration range hood device. Through the coordinated arrangement of a range hood module, a coupling module, a vapor compression refrigeration module, and an absorption refrigeration module, the flue gas outlet of the range hood module is coupled and connected to the heat source inlet of the generator of the absorption refrigeration module. The high-temperature flue gas generated by the range hood module serves as the driving heat source for the absorption refrigeration module, utilizing the waste heat from the flue gas to drive the absorption refrigeration module in a refrigeration cycle. Simultaneously, the recooler of the coupling module couples the refrigeration cycles of the vapor compression refrigeration module and the absorption refrigeration module. Through the heat exchange-capable hot-side and cold-side flow channels built into the recooler, the steam... The refrigeration cycle of the vapor compression refrigeration module exchanges heat with the refrigeration cycle of the absorption refrigeration module. The cooling capacity of the low-pressure, low-temperature gas-liquid mixture refrigerant generated by the absorption refrigeration module's refrigeration cycle is used to cool the high-temperature, high-pressure liquid refrigerant generated by the vapor compression refrigeration module's refrigeration cycle. This achieves deep subcooling of the high-temperature, high-pressure liquid refrigerant in the vapor compression refrigeration module, increasing the cooling capacity of the vapor compression refrigeration module and improving its refrigeration energy efficiency ratio while keeping the compressor power consumption basically unchanged. At the same time, it realizes the recovery and utilization of waste heat from flue gas, improving energy utilization efficiency. It can especially meet the cooling and cooling needs of the kitchen indoor environment during the peak cooking season in summer.

[0061] See Figure 1 , Figure 2 , Figure 3 and Figure 4 This application provides a composite refrigeration range hood device, including a range hood module 100, a coupling module, a vapor compression refrigeration module 300, and an absorption refrigeration module 400.

[0062] The range hood module 100 has a flue gas outlet 110 for discharging flue gas. The coupling module includes a recooler 200, which has a hot-side flow channel 210 and a cold-side flow channel 220 capable of exchanging heat with each other. The vapor compression refrigeration module 300 includes a compressor 310, a first condenser 320, a first throttle valve 330, and an evaporator 340 connected in sequence. The first condenser 320 is connected to the first throttle valve 330 through the hot-side flow channel 210. The vapor compression refrigeration module 300 has a cold air vent 350 that communicates with the indoor environment. The absorption refrigeration module 400 includes a generator 410, a second condenser 420, a second throttle valve 430, an absorber 440, and a circulating pump 450. The refrigerant outlet 411 of the generator 410, the second condenser 420, the second throttle valve 430, the cold-side flow channel 220, the refrigerant inlet 441 of the absorber 440, the working fluid outlet 443 of the absorber 440, the circulating pump 450, and the working fluid inlet 413 of the generator 410 are connected sequentially. The absorbent outlet 412 of the generator 410 is connected to the absorbent inlet 442 of the absorber 440. The heat source inlet (not shown in the figure) of the generator 410 is connected to the flue gas outlet 110.

[0063] It should be noted that, Figure 2 and Figure 3 The hollow arrows in the diagram indicate the direction of refrigerant or coolant flow.

[0064] It should be noted that in this application, the range hood module 100 refers to a functional unit that integrates oil fume extraction, collection, and discharge. It is used to collect oil fumes, high-temperature steam, and high-temperature flue gas generated during the user's cooking process. The flue gas outlet 110 can be set at the end of the range hood module 100 to provide a driving heat source for the downstream absorption refrigeration module 400, thereby realizing the centralized transportation and discharge of flue gas.

[0065] For example, the range hood module 100 is an integrated oil fume collection cavity or shell structure with an internal air duct. A flue gas outlet 110 is formed at the end of the cavity. The flue gas outlet 110 can be a tubular connection interface. A vortex fan can be installed in the air duct to draw and gather the high-temperature fumes generated during cooking into the air duct. The fumes are then directed through the flue gas outlet 110 to the generator 410 of the absorption cooling module 400 as the driving heat source for the absorption cooling module 400.

[0066] In this application, the vapor compression refrigeration module 300 refers to the active electric drive refrigeration unit of the composite refrigeration range hood device. As the main circulation refrigeration unit of the kitchen indoor environment, it relies on electric energy to drive the refrigerant circulation phase change to absorb heat and provide basic cooling for the kitchen indoor environment.

[0067] In the vapor compression refrigeration module 300, the compressor 310 is used to compress the low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant, thereby increasing the refrigerant potential energy and temperature.

[0068] For example, the compressor 310 is configured as a hermetically sealed compressor body, which has a motor and a compression piston inside, and is equipped with a low-pressure air inlet and a high-pressure exhaust port to realize the pressurization and delivery of gaseous refrigerant.

[0069] In the vapor compression refrigeration module 300, the first condenser 320 is used to condense and liquefy the high-temperature and high-pressure gaseous refrigerant into a high-temperature and high-pressure liquid refrigerant. The high-temperature and high-pressure gaseous refrigerant releases some heat and enters the hot side flow channel 210 of the recooler 200 after liquefaction, so that the high-temperature and high-pressure liquid refrigerant can undergo subsequent secondary heat exchange and heat dissipation in the recooler 200.

[0070] For example, the first condenser 320 is configured as a tubular heat exchange structure integrating multiple sets of heat exchange coils and heat dissipation fins. The heat exchange coils are inserted into the heat dissipation fins and arranged in a coiled manner. The refrigerant inlet and refrigerant outlet of the first condenser 320 are respectively connected to the compressor 310 and the hot side flow channel 210 of the recooler 200. The vapor compression refrigeration module 300 may also include a first centrifugal fan 360. The air outlet of the first centrifugal fan 360 faces the first condenser 320 to provide air cooling for it, so that the first condenser 320 can quickly condense and liquefy the high-temperature and high-pressure gaseous refrigerant into a high-temperature and high-pressure liquid refrigerant, and quickly dissipate the heat released by the high-temperature and high-pressure gaseous refrigerant.

[0071] In the vapor compression refrigeration module 300, the first throttle valve 330 is used to throttle and reduce the pressure of the high-temperature and high-pressure liquid refrigerant in order to convert the high-temperature and high-pressure liquid refrigerant into a low-temperature and low-pressure gas-liquid mixture refrigerant.

[0072] For example, the first throttle valve 330 is configured as a valve body structure with a built-in microporous throttle channel, and small flow-limiting orifices are arranged inside it. The valve body is sealed to the front and rear refrigerant pipelines, and the throttling and pressure reduction of the refrigerant is achieved through the small flow-limiting orifices.

[0073] In the vapor compression refrigeration module 300, the evaporator 340 is used to allow the low-temperature, low-pressure gas-liquid mixture refrigerant to absorb heat from the kitchen indoor environment and evaporate, so that the cold air outlet 350 of the vapor compression refrigeration module 300 blows out cold air, thereby cooling the kitchen indoor environment.

[0074] For example, the evaporator 340 is configured as a finned evaporative heat exchanger, which includes heat dissipation fins for increasing the heat exchange area and heat exchange coils for refrigerant circulation. The heat exchange coils are inserted into the heat dissipation fins and coiled around them. At the same time, a second centrifugal fan 370 is arranged around the heat exchange coils. The second centrifugal fan 370 is connected to the cold air outlet 350 of the vapor compression refrigeration module 300. The second centrifugal fan 370 forces air convection, so that the air passes through and flows over the surface of the evaporator 340 to exchange heat with the low-temperature, low-pressure gas-liquid mixture refrigerant, thereby achieving cooling. This allows the cold air outlet 350 to blow cold air into the kitchen indoor environment.

[0075] In this application, the absorption refrigeration module 400 refers to the auxiliary refrigeration unit driven by the waste heat of flue gas in the composite refrigeration range hood device. It uses the waste heat of flue gas to replace electric energy to drive refrigeration, assist in refrigeration and cooling, improve energy utilization efficiency, and at the same time increase the refrigeration capacity and refrigeration energy efficiency ratio, and reduce energy consumption.

[0076] In the absorption refrigeration module 400, the generator 410 is the core heat source utilization component. Its heat source inlet is connected to the flue gas outlet 110 of the flue gas module 100. The waste heat of the high-temperature flue gas discharged from the flue gas module 100 is used to exchange heat with the generator 410, so that the waste heat of the high-temperature flue gas heats the working fluid pair solution in the generator 410, causing the refrigerant in the working fluid pair solution to boil, so as to separate the high-temperature and high-pressure gaseous refrigerant from the working fluid pair solution in the generator 410, and provide power for the refrigeration cycle of the absorption refrigeration module 400.

[0077] For example, the generator 410 can be configured as a jacketed heat exchange tank structure. The tank interior has a heat source channel and a working fluid pair containing cavity. The outer wall of the tank has a heat source inlet communicating with the flue gas outlet 110. The outer wall of the tank also has a refrigerant outlet 411, an absorbent outlet 412, and a working fluid pair inlet 413. The high-temperature flue gas heat source inlet enters the heat source channel and flows within it, heating and decomposing the working fluid pair within the containing cavity. The working fluid pair solution within the generator 410 can be a lithium bromide-water solution, with lithium bromide as the absorbent and water as the refrigerant.

[0078] In the absorption refrigeration module 400, the second condenser 420 is used to receive the high-temperature and high-pressure gaseous refrigerant output by the generator 410 and condense the high-temperature and high-pressure gaseous refrigerant into a high-temperature and high-pressure liquid refrigerant.

[0079] For example, the second condenser 420 is configured as a tubular heat exchange structure integrating multiple sets of heat exchange coils and heat dissipation fins. The heat exchange coils are inserted into the heat dissipation fins and arranged in a coiled manner. The refrigerant inlet and refrigerant outlet of the second condenser 420 are respectively connected to the refrigerant outlet 411 of the generator 410 and the second throttling valve 430. The absorption refrigeration module 400 may also include a third centrifugal fan. The air outlet of the third centrifugal fan faces the second condenser 420 to provide air cooling for it, so that the second condenser 420 can quickly condense and liquefy the high-temperature and high-pressure gaseous refrigerant into a high-temperature and high-pressure liquid refrigerant, and quickly dissipate the heat released by the high-temperature and high-pressure gaseous refrigerant.

[0080] Of course, in other embodiments, the outlet of the first centrifugal fan of the vapor compression refrigeration module 300 is directed not only toward the first condenser 320, but also toward the second condenser 420, providing air cooling to both the first and second condensers 320. This simplifies the structural setup and reduces costs while improving energy efficiency. It also enables the first condenser 320 to quickly condense and liquefy the high-temperature, high-pressure gaseous refrigerant into a high-temperature, high-pressure liquid refrigerant, and enables the second condenser 420 to quickly condense and liquefy the high-temperature, high-pressure gaseous refrigerant into a high-temperature, high-pressure liquid refrigerant.

[0081] In the absorption refrigeration module 400, the second throttle valve 430 is used to throttle and cool the high-temperature and high-pressure liquid refrigerant output from the second condenser 420, so as to convert the high-temperature and high-pressure liquid refrigerant into a low-pressure and low-temperature gas-liquid mixture refrigerant.

[0082] For example, the second throttle valve 430 is configured as a valve body structure with a built-in microporous throttle channel, and small flow-limiting orifices are arranged inside it. The valve body is sealed to the front and rear refrigerant pipelines, and the refrigerant is throttled and pressure reduced through the small flow-limiting orifices.

[0083] It should be noted that, as described in the background technical content above, the indoor temperature of a kitchen is generally relatively high (especially during peak cooking periods in summer). The temperature near the first condenser 320 of the vapor compression refrigeration module 300 is also high. This results in difficulty in heat exchange in the first condenser 320 when the high-temperature, high-pressure gaseous refrigerant output from the compressor 310 flows through it for cooling. In other words, the condensing heat load of the vapor compression refrigeration module 300 is too high, and the heat exchange effect of the first condenser 320 is poor. Consequently, the high-temperature, high-pressure refrigerant output from the first condenser 320 to the first throttle valve 330 will flash prematurely due to temperature rise and pressure loss, generating some flash vapor. This causes the high-temperature, high-pressure refrigerant output from the first condenser 320 to exhibit a gas-liquid two-phase mixed state. Even if the first condenser 310... The high-temperature, high-pressure refrigerant output from 20 is a saturated liquid. This saturated liquid high-temperature, high-pressure refrigerant will also flash prematurely due to temperature rise and pressure loss, generating some flash vapor. Moreover, when this saturated liquid high-temperature, high-pressure refrigerant enters the first throttling valve 330 for throttling, it will still produce flash vapor due to pressure loss (when the pressure of the high-pressure saturated refrigerant suddenly drops, some of the liquid refrigerant absorbs excess sensible heat and quickly converts into saturated vapor under the container pressure), also generating flash vapor. This part of flash vapor will not participate in the refrigeration cycle of the vapor compression refrigeration module 300, occupying the volume of the evaporator 340, increasing the refrigerant flow resistance of the refrigeration cycle of the vapor compression refrigeration module 300, reducing the heat exchange effect of the evaporator 340, significantly increasing the power consumption per unit cooling capacity, and drastically reducing the cooling energy efficiency ratio (COP).

[0084] Based on this, in this application, the low-pressure, low-temperature gas-liquid mixed refrigerant output from the second throttle valve 430 flows into the cold-side channel 220 of the recooler 200. Because the temperature of the low-pressure, low-temperature gas-liquid mixed refrigerant in the cold-side channel 220 is much lower than the temperature of the high-temperature, high-pressure liquid refrigerant in the hot-side channel 210, the low-pressure, low-temperature gas-liquid mixed refrigerant in the cold-side channel 220 and the high-temperature, high-pressure liquid refrigerant in the hot-side channel 210 exchange heat. The low-pressure, low-temperature gas-liquid mixed refrigerant in the cold-side channel 220 absorbs heat from the hot-side channel 210. The heat of the high-temperature, high-pressure liquid refrigerant is converted into a low-temperature, low-pressure gaseous refrigerant. During this process, the low-pressure, low-temperature gas-liquid mixture in the cold-side flow channel 220 deeply subcools the high-temperature, high-pressure liquid refrigerant in the hot-side flow channel 210, further distancing the high-temperature, high-pressure liquid state point in the hot-side flow channel 210 from the gas-liquid two-phase region. This ensures that the high-temperature, high-pressure liquid refrigerant in the hot-side flow channel 210 becomes a completely single-phase liquid refrigerant before flowing into the first throttling valve 330, preventing the high-temperature, high-pressure refrigerant output from the first condenser 320 from being released into the first throttling valve 330. Flashing occurs within the pipe of flow valve 330 and within the first throttle valve 330 due to pressure loss, reducing or even eliminating flash vapor. This lowers the enthalpy of the refrigerant entering evaporator 340 and increases the heat absorption of evaporator 340. Furthermore, this subcooling effect occurs on the high-pressure side of compressor 310 and has minimal impact on the compressor 310's suction state, compression ratio, and discharge enthalpy. Therefore, this subcooling effect, reducing the enthalpy of the refrigerant entering evaporator 340 and increasing the heat absorption of evaporator 340, is achieved while keeping the power consumption of compressor 310 essentially unchanged. The subcooling effect increases the cooling capacity of the vapor compression refrigeration module 300 and improves its refrigeration efficiency ratio. In addition, the subcooling effect can also buffer the pressure loss of the high-temperature and high-pressure refrigerant output from the first condenser 320 during long-distance transportation in the pipeline, further ensuring that the high-temperature and high-pressure liquid refrigerant is a completely single-phase liquid refrigerant before flowing into the first throttle valve 330, optimizing the heat exchange effect of the evaporator 340, which also helps to increase the cooling capacity of the vapor compression refrigeration module 300 and improve its refrigeration efficiency ratio.

[0085] It should also be noted that the cold side flow channel 220 is connected to the refrigerant inlet 441 of the absorber 440 of the absorption refrigeration module 400. After the low-pressure, low-temperature gas-liquid mixed refrigerant in the cold side flow channel 220 absorbs the heat of the high-temperature, high-pressure liquid refrigerant in the hot side flow channel 210, it becomes a low-temperature, low-pressure gaseous refrigerant, which flows into the absorber 440.

[0086] It should also be noted that after the high-temperature flue gas discharged from the generator 410 and the flue gas module 100 exchanges heat, the working fluid in the generator 410 is separated from the refrigerant in the solution. The remaining solution in the generator 410 is a concentrated absorbent solution. Since the absorbent outlet 412 of the generator 410 is connected to the absorbent inlet 442 of the absorber 440, the remaining concentrated absorbent solution in the generator 410 will also flow into the absorber 440.

[0087] In the absorption refrigeration module 400, the absorber 440 receives the concentrated absorbent solution output from the generator 410 and the low-temperature, low-pressure gaseous refrigerant output from the cold-side flow channel 220 of the recooler 200. Within the absorber 440, the concentrated absorbent solution strongly absorbs the low-temperature, low-pressure gaseous refrigerant, forming a dilute working fluid pair solution composed of absorbent and refrigerant. Since the working fluid pair outlet 443 of the absorber 440 is connected to the working fluid pair inlet 413 of the generator 410 via a circulation pump 450, the dilute working fluid pair solution within the absorber 440 is heated by the circulation pump 450 and then transported into the generator 410, thereby achieving the recycling of the absorbent-refrigerant working fluid pair solution.

[0088] For example, the absorber 440 can be configured as an integrated sealed tank structure, with a refrigerant inlet 441, an absorbent inlet 442, and a working fluid outlet 443 spaced apart on the outer wall of the tank, to achieve the mixing and reflux of the concentrated absorbent solution and the low-temperature, low-pressure gaseous refrigerant. Furthermore, the outlet of the first centrifugal fan of the vapor compression refrigeration module 300 can also be directed towards the absorber 440, so that the first centrifugal fan, in addition to providing air cooling to the first condenser 320 and the second condenser 420, also provides air cooling to the absorber 440. Through forced convection of airflow, the heat released during the mixing process of the concentrated absorbent solution and the low-temperature, low-pressure gaseous refrigerant in the absorber 440 is carried away.

[0089] In the absorption refrigeration module 400, the circulation pump 450 provides power for the fluid circulation of the absorption refrigeration module 400, that is, provides driving power for the refrigeration cycle of the absorption refrigeration module 400. The circulation pump 450 can be a water pump.

[0090] In this application, based on the above description, it can be understood that the recooler 200 of the coupling module refers to the coupling unit of the vapor compression refrigeration module 300 and the absorption refrigeration module 400, used to link the refrigeration cycles of the vapor compression refrigeration module 300 and the absorption refrigeration module 400, enabling heat exchange between the refrigeration cycles of the vapor compression refrigeration module 300 and the absorption refrigeration module 400. It has built-in heat-exchangeable hot-side flow channel 210 and cold-side flow channel 220, so that the cooling capacity of the low-pressure, low-temperature gas-liquid mixture refrigerant generated by the refrigeration cycle of the absorption refrigeration module 400 is used to cool the high-temperature, high-pressure liquid refrigerant generated by the refrigeration cycle of the vapor compression refrigeration module 300, thereby achieving deep subcooling of the high-temperature, high-pressure liquid refrigerant of the vapor compression refrigeration module 300. Under the condition that the power consumption of the compressor 310 remains basically unchanged, the cooling capacity of the vapor compression refrigeration module 300 is increased, and the refrigeration energy efficiency ratio of the vapor compression refrigeration module 300 is improved.

[0091] For example, the recooler 200 is configured as an integrated shell heat exchange structure, with a hot-side flow channel 210 and a cold-side flow channel 220 that fit together inside the shell. The high-temperature and high-pressure liquid refrigerant in the hot-side flow channel 210 and the low-pressure and low-temperature gas-liquid mixture refrigerant in the cold-side flow channel 220 undergo indirect heat exchange. It should be noted that the hot-side flow channel 210 and the cold-side flow channel 220 are not connected to each other, but only form a heat transfer.

[0092] Based on the above description, it is easy to understand that the composite refrigeration range hood device of this application embodiment, through the coordinated arrangement of the range hood module 100, coupling module, vapor compression refrigeration module 300, and absorption refrigeration module 400, couples the flue gas outlet 110 of the range hood module 100 with the heat source inlet of the generator 410 of the absorption refrigeration module 400. This allows the high-temperature flue gas generated by the range hood module 100 to serve as the driving heat source for the absorption refrigeration module 400, utilizing the waste heat from the flue gas generated by the range hood module 100 to drive the absorption refrigeration module 400 in a refrigeration cycle. Simultaneously, the recooler 200 of the coupling module couples and links the refrigeration cycles of the vapor compression refrigeration module 300 and the absorption refrigeration module 400, through the heat exchange-capable hot-side flow channel built into the recooler 200. 210 and the cold side flow channel 220 enable heat exchange between the refrigeration cycle of the vapor compression refrigeration module 300 and the refrigeration cycle of the absorption refrigeration module 400. The cooling capacity of the low-pressure, low-temperature gas-liquid mixture refrigerant generated by the refrigeration cycle of the absorption refrigeration module 400 is used to cool the high-temperature, high-pressure liquid refrigerant generated by the refrigeration cycle of the vapor compression refrigeration module 300, achieving deep subcooling of the high-temperature, high-pressure liquid refrigerant of the vapor compression refrigeration module 300. This increases the cooling capacity of the vapor compression refrigeration module 300 while keeping the power consumption of the compressor 310 basically unchanged, improving the refrigeration energy efficiency ratio of the vapor compression refrigeration module 300. At the same time, it realizes the recovery and utilization of waste heat from flue gas, improving energy utilization efficiency. It can especially meet the cooling and temperature reduction needs of the kitchen indoor environment during the peak cooking period in summer.

[0093] In some embodiments of this application, see Figure 2 and Figure 3 The hot-side flow channel 210 and the cold-side flow channel 220 are attached to each other but not connected, and the hot-side flow channel 210 and the cold-side flow channel 220 exchange heat through the partition wall.

[0094] Specifically, see Figure 4 The recooler 200 is configured as an integrated shell heat exchange structure. The shell of the recooler 200 is provided with a continuously bent hot side flow channel 210 and a cold side flow channel 220. One end of the hot side flow channel 210 is connected to the refrigerant outlet of the first condenser 320 through a pipe, and the other end of the hot side flow channel 210 is connected to the refrigerant inlet of the first throttle valve 330 through a pipe. One end of the cold side flow channel 220 is connected to the refrigerant outlet of the second throttle valve 430 through a pipe, and the other end of the cold side flow channel 220 is connected to the refrigerant inlet 441 of the absorber 440.

[0095] Both the hot-side flow channel 210 and the cold-side flow channel 220 of the recooler 200 can be made of metal pipes. The hot-side flow channel 210 and the cold-side flow channel 220 share the same metal pipe wall and exchange heat in a partition heat exchange manner.

[0096] Thus, the low-pressure, low-temperature gas-liquid mixture refrigerant in the cold-side channel 220 and the high-temperature, high-pressure liquid refrigerant in the hot-side channel 210 do not directly contact each other. Heat is conducted only through the closely fitting partition between the two channels. The low-pressure, low-temperature gas-liquid mixture refrigerant in the cold-side channel 220 absorbs heat from the high-temperature, high-pressure liquid refrigerant in the hot-side channel 210, transforming into a low-temperature, low-pressure gaseous refrigerant. This fully utilizes the cooling capacity generated by the absorption refrigeration module 400 to deeply subcool the high-temperature, high-pressure liquid refrigerant in the hot-side channel 210, thus reducing its temperature and pressure. The state point is further away from the gas-liquid two-phase region, so that the high-temperature and high-pressure liquid refrigerant in the hot-side flow channel 210 becomes a completely single-phase liquid refrigerant before flowing into the first throttle valve 330. This is beneficial to increase the cooling capacity of the vapor compression refrigeration module 300 and improve the cooling energy efficiency ratio of the vapor compression refrigeration module 300. At the same time, it prevents the low-pressure and low-temperature gas-liquid mixed refrigerant in the cold-side flow channel 220 from mixing and contaminating with the high-temperature and high-pressure liquid refrigerant in the hot-side flow channel 210, and ensures that the vapor compression refrigeration module 300 and the absorption refrigeration module 400 operate independently and stably.

[0097] In some embodiments of this application, see Figure 2 , Figure 3 as well as Figure 4 , Figure 5 , Figure 6 and Figure 7 The absorption refrigeration module 400 also includes a regulating valve 460, which is connected between the absorbent outlet 412 of the generator 410 and the absorbent inlet 442 of the absorber 440.

[0098] Understandably, one end of the regulating valve 460 is connected to the absorbent outlet 412 of the generator 410 via a pipe, and the other end is connected to the absorbent inlet 442 of the absorber 440 via a pipe.

[0099] By connecting a regulating valve 460 between the absorbent outlet 412 of the generator 410 and the absorbent inlet 442 of the absorber 440, the flow rate of the concentrated absorbent solution output from the generator 410 to the absorber 440 is adjusted in real time through the regulating valve 460. This matches the operating conditions of the absorber 440, helps to balance the working fluid circulation ratio between the absorber 440 and the generator 410, avoids excessive or insufficient supply of the concentrated absorbent solution, and effectively stabilizes the absorption reaction process inside the absorber 440.

[0100] In some embodiments of this application, see Figure 4 , Figure 5 , Figure 8 , Figure 9 , Figure 10 and Figure 11The vapor compression refrigeration module 300 also includes a first centrifugal fan 360, the outlet of which faces the first condenser 320.

[0101] Specifically, the composite refrigeration range hood device also includes a body 10, which is a shell structure. The range hood module 100, coupling module, vapor compression refrigeration module 300, and absorption refrigeration module 400 are all located inside the body 10. The cold air vent 350 of the vapor compression refrigeration module 300 is located on the outer wall of the body 10 to communicate with the indoor environment. The body 10 is also equipped with a terminal exhaust pipe 13 for discharging the flue gas after heat exchange.

[0102] In addition, see Figure 1 The outer wall of the body 10 is also provided with a first air inlet 11, the air inlet end of the first centrifugal fan 360 is connected to the first air inlet 11, and the air outlet end of the first centrifugal fan 360 is directly opposite the first condenser 320.

[0103] After the first centrifugal fan 360 is turned on, the external airflow of the unit 10 is forced to enter the unit 10 through the first air inlet 11, forming a forced convection airflow that blows towards the first condenser 320. This airflow continuously sweeps the surface of the first condenser 320, accelerating the dissipation of heat from the surface of the first condenser 320. This allows the first condenser 320 to quickly condense and liquefy the high-temperature, high-pressure gaseous refrigerant into a high-temperature, high-pressure liquid refrigerant, rapidly dissipating the heat released by the high-temperature, high-pressure gaseous refrigerant. This helps to improve the heat accumulation phenomenon in the first condenser 320 and inside the unit 10, enhances the heat exchange effect of the first condenser 320, and further improves the cooling energy efficiency ratio of the vapor compression refrigeration module 300.

[0104] Further, see Figure 4 , Figure 5 , Figure 8 , Figure 9 , Figure 10 and Figure 11 The air outlet of the first centrifugal fan 360 is also directed toward the second condenser 420 and the absorber 440. The second condenser 420 and the absorber 440 are offset relative to the air outlet of the first centrifugal fan 360, and the first condenser 320 and the second condenser 420 are also offset relative to the air outlet of the first centrifugal fan 360.

[0105] Specifically, the second condenser 420 and the absorber 440 are arranged adjacent to each other along the width direction of the body 10, and the first condenser 320 and the second condenser 420 are arranged adjacent to each other along the height direction of the body 10.

[0106] The above structure allows the outlet of the first centrifugal fan 360 to simultaneously face the first condenser 320, the second condenser 420, and the absorber 440. Furthermore, the first condenser 320, the second condenser 420, and the absorber 440 are staggered relative to the outlet of the first centrifugal fan 360, ensuring that the airflow from the first centrifugal fan 360 covers all three condensers. This allows the airflow from the first centrifugal fan 360 to dissipate heat more evenly to the first condenser 320, the second condenser 420, and the absorber 440, reducing their operating temperatures, stabilizing the operating conditions of the vapor compression refrigeration module 300 and the absorption refrigeration module 400, and further improving the refrigeration efficiency ratio of the vapor compression refrigeration module 300.

[0107] In some embodiments of this application, see Figure 5 and Figure 7 The composite refrigeration range hood device also includes a spray module, which includes a water collection tank (not shown in the figure), a splash impeller 500, and a drive unit (not shown in the figure). The splash impeller 500 is at least partially located in the water collection tank, and the drive unit is used to drive the splash impeller 500 to rotate so that the condensate in the water collection tank forms spray water. The first condenser 320, the second condenser 420, and the absorber 440 are all located within the spray range of the spray water.

[0108] Specifically, the output end of the drive unit is connected to the splash impeller 500, and the drive unit can be, but is not limited to, a waterproof motor or waterproof motor.

[0109] In the above structure, the driving component drives the splash impeller 500 to rotate, disturbing and dispersing the condensate collected in the water collection tank to form a spray mist. The first condenser 320, the second condenser 420, and the absorber 440 are all within the spray coverage area. Based on the forced convection cooling provided by the first centrifugal fan 360, the spray cooling provided by the spray module can be superimposed to quickly reduce the operating temperature of the first condenser 320, the second condenser 420, and the absorber 440, stabilize the operating conditions of the vapor compression refrigeration module 300 and the absorption refrigeration module 400, and further improve the refrigeration efficiency ratio of the vapor compression refrigeration module 300.

[0110] In some embodiments of this application, see Figure 4 , Figure 5 , Figure 8 , Figure 9 , Figure 10 and Figure 11 The vapor compression refrigeration module 300 also includes a second centrifugal fan 370, the outlet of which faces the evaporator 340.

[0111] The outer wall of the body 10 is also provided with a second air inlet 12. The air inlet end of the second centrifugal fan 370 is connected to the second air inlet 12. The air outlet end of the second centrifugal fan 370 is directly facing the evaporator 340 and also facing the cold air outlet 350.

[0112] After the second centrifugal fan 370 is turned on, the external airflow of the unit 10 is forced to enter the unit 10 through the second air inlet 12, forming a forced convection airflow that blows towards the evaporator 340. This causes the airflow to continuously sweep the surface of the evaporator 340, accelerating the heat exchange between the airflow and the low-temperature, low-pressure gas-liquid mixture refrigerant in the evaporator 340. This quickly removes heat from the indoor air of the kitchen, enhances the evaporation and heat absorption effect of the evaporator 340, increases the cold air output, and improves the cooling effect on the indoor environment of the kitchen.

[0113] In some embodiments of this application, the range hood module 100 further includes a first temperature sensor (not shown in the figure), which is located at the flue gas outlet 110 to detect the temperature of the flue gas; the composite refrigeration range hood device further includes a control module (not shown in the figure), which is communicatively connected to the first temperature sensor, the compressor 310 and the circulation pump 450.

[0114] Specifically, the control module is configured as a control circuit board based on computer program operation. In addition to communicating with the first temperature sensor, compressor 310 and circulating pump 450, the control module also communicates with the aforementioned first centrifugal fan 360, second centrifugal fan 370 and drive unit to control the start, stop and speed of the first centrifugal fan 360, second centrifugal fan 370 and drive unit respectively.

[0115] The above-described structure includes a first temperature sensor installed at the flue gas outlet 110, which collects the temperature of the flue gas generated by the range hood module 100 in real time and feeds it back to the control module. This allows the control module to intelligently determine the heat load and residual heat level of the kitchen indoor environment based on the flue gas temperature, and adaptively adjust the operating frequency and start / stop of the compressor 310, the speed and start / stop of the first centrifugal fan 360, the speed and start / stop of the second centrifugal fan 370, the speed and start / stop of the drive components, and the operating power and pumping flow of the circulating pump 450.

[0116] Furthermore, this application embodiment also provides a refrigeration method, which is implemented using the above-mentioned composite refrigeration range hood device, and includes the following steps:

[0117] Step S100: Detect the flue gas temperature at flue gas outlet 110 and the indoor ambient temperature;

[0118] Step S200: When the flue gas temperature at flue gas outlet 110 is lower than the first preset temperature and the indoor ambient temperature is lower than the second preset temperature, control the circulation pump 450 to turn off. When the flue gas temperature at flue gas outlet 110 is greater than or equal to the first preset temperature, or the indoor ambient temperature is greater than or equal to the second preset temperature, control the circulation pump 450 to turn on.

[0119] Specifically, a first temperature sensor is installed at the flue gas outlet 110 to detect the flue gas temperature in real time, and a second temperature sensor is installed in the indoor environment to detect the indoor ambient temperature in real time. The control module is also connected to the second temperature sensor.

[0120] In the real-time cooling method of the above-mentioned composite refrigeration range hood device, when the first temperature sensor detects that the flue gas temperature is lower than the first preset temperature, and the second temperature sensor detects that the indoor ambient temperature is lower than the second preset temperature, it indicates that the heat load of the kitchen indoor environment is low and the overall ambient temperature of the device is not high. At this time, the individual refrigeration cycle of the vapor compression refrigeration module 300 can meet the cooling and temperature reduction requirements of the kitchen indoor environment. The control module shuts down the circulation pump 450, causing the absorption refrigeration module 400 to stop the refrigeration cycle. At the same time, the operating frequency of the compressor 310, the speed of the first centrifugal fan 360, the speed of the second centrifugal fan 370, and the speed of the drive components are reasonably reduced to reduce ineffective energy consumption.

[0121] When the first temperature sensor detects that the flue gas temperature is greater than or equal to the first preset temperature, or when the second temperature sensor detects that the indoor ambient temperature is greater than or equal to the second preset temperature, it indicates that the heat load of the kitchen indoor environment is high and the overall ambient temperature of the device is high. At this time, the control module starts the circulation pump 450, so that the absorption refrigeration module 400 performs refrigeration cycle driven by the heat source of the waste heat of the flue gas. Through the deep subcooling effect of the low-pressure, low-temperature gas-liquid mixed refrigerant in the cold side channel 220 of the recooler 200 on the high-temperature, high-pressure liquid refrigerant in the hot side channel 210, the cooling capacity of the vapor compression refrigeration module 300 is increased while the power consumption of the compressor 310 remains basically unchanged, thereby improving the refrigeration energy efficiency ratio of the vapor compression refrigeration module 300. At the same time, the waste heat of the flue gas is recovered and utilized, improving energy utilization efficiency. In particular, it can meet the cooling and cooling needs of the kitchen indoor environment during the peak cooking period in summer.

[0122] The first and second preset temperatures can be set reasonably according to the actual size of the kitchen space and the user's cooking habits.

[0123] In addition, this application also provides a composite refrigeration cycle system, which includes the composite refrigeration range hood device of any of the above embodiments.

[0124] The composite refrigeration cycle system of this application embodiment, because it is equipped with the above-mentioned composite refrigeration range hood device, also has the same technical effect brought by the composite refrigeration range hood device, that is, it can increase the cooling capacity of the vapor compression refrigeration module 300 and improve the cooling energy efficiency ratio of the vapor compression refrigeration module 300 while keeping the power consumption of the compressor 310 basically unchanged. At the same time, it can realize the recovery and utilization of waste heat of flue gas, improve energy utilization efficiency, and can especially meet the cooling and cooling needs of the kitchen indoor environment during the peak cooking period in summer.

[0125] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0126] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A composite refrigeration range hood device, characterized in that, include: The range hood module has a flue gas outlet for discharging flue gas; The coupling module includes a recooler having a hot-side flow channel and a cold-side flow channel capable of exchanging heat with each other; A vapor compression refrigeration module includes a compressor, a first condenser, a first throttling valve, and an evaporator connected in sequence. The first condenser is connected to the first throttling valve through the hot side flow channel. The vapor compression refrigeration module has a cold air vent that communicates with the indoor environment. An absorption refrigeration module includes a generator, a second condenser, a second throttle valve, an absorber, and a circulating pump. The refrigerant outlet of the generator, the second condenser, the second throttle valve, the cold side flow channel, the refrigerant inlet of the absorber, the working fluid pair outlet of the absorber, the circulating pump, and the working fluid pair inlet of the generator are connected in sequence, and the absorbent outlet of the generator is connected to the absorbent inlet of the absorber. The heat source inlet of the generator is connected to the flue gas outlet.

2. The composite refrigeration range hood device according to claim 1, characterized in that, The hot-side flow channel and the cold-side flow channel are fitted together but not connected, and the hot-side flow channel and the cold-side flow channel exchange heat through a partition wall.

3. The composite refrigeration range hood device according to claim 1, characterized in that, The absorption refrigeration module also includes a regulating valve, which is connected between the absorbent outlet of the generator and the absorbent inlet of the absorbent.

4. The composite refrigeration range hood device according to claim 1, characterized in that, The vapor compression refrigeration module further includes a first centrifugal fan, the outlet of which faces the first condenser.

5. The composite refrigeration range hood device according to claim 4, characterized in that, The outlet of the first centrifugal fan also faces the second condenser and the absorber. The second condenser and the absorber are offset relative to the outlet of the first centrifugal fan.

6. The composite refrigeration range hood device according to claim 1, characterized in that, The composite refrigeration range hood device also includes a spray module, which includes a water collection tank, a splash impeller, and a driving component. The splash impeller is at least partially disposed in the water collection tank, and the driving component is used to drive the splash impeller to rotate so that the condensate in the water collection tank forms spray water. The first condenser, the second condenser, and the absorber are all located within the spray range of the spray water.

7. The composite refrigeration range hood device according to claim 1, characterized in that, The vapor compression refrigeration module also includes a second centrifugal fan, the outlet of which faces the evaporator.

8. The composite refrigeration range hood device according to any one of claims 1 to 7, characterized in that, The range hood module further includes a first temperature sensor located at the flue gas outlet to detect the temperature of the flue gas; the composite refrigeration range hood device further includes a control module, which is communicatively connected to the first temperature sensor, the compressor, and the circulation pump.

9. A composite refrigeration cycle system, characterized in that, Includes the composite refrigeration range hood device as described in any one of claims 1 to 8.

10. A refrigeration method, implemented using the composite refrigeration range hood device as described in any one of claims 1 to 8, characterized in that, Includes the following steps: Step S100: Detect the flue gas temperature at the flue gas outlet and the indoor ambient temperature; Step S200: When the flue gas temperature at the flue gas outlet is less than the first preset temperature and the indoor ambient temperature is less than the second preset temperature, control the circulation pump to turn off; when the flue gas temperature at the flue gas outlet is greater than or equal to the first preset temperature, or the indoor ambient temperature is greater than or equal to the second preset temperature, control the circulation pump to turn on.

Images