Waste heat recovery system of refrigeration type range hood

Abstract

A waste heat recovery system of a refrigeration type extractor hood comprises an oil smoke suction module and a refrigeration module, an oil smoke suction fan outlet of the oil smoke suction module is externally connected with a smoke pipe, a compressor, a condenser and an evaporator of the refrigeration module are communicated through a refrigerant pipeline, a cooling fan is used for cooling the condenser, and an indoor unit fan is used for blowing out cold air on the side of the evaporator. The system further comprises a heat exchanger and a drying machine, the drying machine is communicated with the heat exchanger through an air pipe loop, an outlet of the heat dissipation fan is communicated with the smoke pipe through a heat dissipation air pipe, and the heat dissipation air pipe flows through the heat exchanger to exchange heat with the air pipe loop in the heat exchanger. According to the waste heat recovery system of the refrigeration type range hood, the drying machine is communicated with the heat exchanger through the air pipe loop, an outlet of the heat dissipation fan is communicated with the smoke pipe through the heat dissipation air pipe, and the heat dissipation air pipe flows through the heat exchanger and exchanges heat with the air pipe loop in the heat exchanger, so that heat of the condenser can enter the drying machine to be used by the drying machine; the energy utilization rate is improved, energy consumption is reduced, and energy conservation and emission reduction are achieved.

Description

Technical Field

[0001] This utility model relates to a refrigerated range hood, and more particularly to a waste heat recovery system for a refrigerated range hood. Background Technology

[0002] Existing technologies disclose various types of refrigerated range hoods, which add a refrigeration module to the existing range hood platform. This allows them to perform all the functions of a range hood as well as provide air conditioning cooling. The refrigeration module includes a compressor, condenser, and evaporator, with the compressor connected to the condenser and evaporator via refrigerant piping. The current working principle of refrigerated range hoods is as follows: indoor return air transfers heat to the refrigerant at the evaporator, lowering its temperature, which is then blown out by the evaporator fan, thus achieving cooling. High-temperature refrigerant transfers heat to the air at the condenser. Since the condenser and cooling fan are located indoors, this heated air is blown out by the cooling fan and enters the flue, where it is discharged into the common flue along with the fumes drawn in by the range hood fan. The hot air blown out by the cooling fan is directly discharged into the common flue, resulting in a waste of heat as this portion of heat is not utilized. For example, the Chinese invention patent No. 201810867346.X (authorization announcement No. CN 110726174 B) discloses a "Kitchen Air Conditioning System." This system places the fan of the fume extraction component in the outdoor rear exhaust duct. The third heat exchanger in the rear exhaust duct is connected to the second heat exchanger of the air conditioning component via a cooling channel. The heat generated by the air conditioning component during operation can be quickly discharged outdoors through the rear exhaust duct. However, this kitchen air conditioning system does not effectively utilize the heat from the refrigeration system. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a waste heat recovery system for a refrigerated range hood that can effectively utilize the heat of the condenser, in light of the above-mentioned existing technology.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a waste heat recovery system for a refrigerated range hood, including a fume extraction module and a refrigeration module. The fume extraction module includes a fume extraction fan, and the outlet of the fume extraction fan is connected to a flue pipe. The refrigeration module includes a compressor, a condenser and an evaporator, a cooling fan and an indoor unit fan. The compressor, condenser and evaporator are connected through a refrigerant pipeline. The cooling fan is used to dissipate heat from the condenser, and the indoor unit fan is used to blow out cold air from the evaporator side. The feature is that it also includes a heat exchanger and a dryer. The dryer and the heat exchanger are connected through a duct loop. The outlet of the cooling fan is connected to the flue pipe through a cooling duct, and the cooling duct flows through the heat exchanger and exchanges heat with the duct loop inside the heat exchanger.

[0005] In a further preferred embodiment, a three-way valve is installed at the outlet of the cooling fan. The inlet of the three-way valve is connected to the outlet of the cooling fan, the first outlet of the three-way valve is connected to the cooling duct, and the second outlet of the three-way valve is connected to the flue pipe via a heat collector. A thermoelectric battery is installed on the heat collector, and the two ends of the thermoelectric battery are connected to a charging device via a voltage regulator. This configuration allows the heat blown by the cooling fan to both heat the dryer and charge the charging device, thus achieving efficient utilization of the heat blown by the cooling fan.

[0006] Thermoelectric batteries can have various structures. Preferably, the thermoelectric battery includes a PN junction, and the P-terminus and N-terminus of the thermoelectric battery are connected by a conductor and sandwiched between two ceramic plates.

[0007] The charging device can have various structures; preferably, the charging device is a power bank.

[0008] In order to effectively dissipate heat from the thermoelectric battery, a radiator is installed on the thermoelectric battery, and a thermoelectric battery cooling fan is installed near the radiator. The air outlet of the thermoelectric battery cooling fan is connected to the flue.

[0009] In order to ensure that the heat from the condenser and the thermoelectric battery can be smoothly discharged through the common flue, a common air duct is also included. The heat dissipation air duct is connected to the common flue through the common air duct, the air outlet of the thermoelectric battery is connected to the common flue through the common air duct, and the solar collector is connected to the common flue through the common air duct.

[0010] To improve the heat dissipation effect of the thermoelectric battery, the radiator is a finned radiator, and the thermoelectric battery cooling fan is located directly above the finned radiator.

[0011] As a preferred embodiment of any of the above solutions, a throttling valve is installed on the refrigerant line between the condenser and the evaporator.

[0012] Compared with the prior art, the advantages of this utility model are as follows: the waste heat recovery system of the refrigeration range hood includes a fume extraction module and a refrigeration module. The dryer and the heat exchanger are connected through a duct circuit. The outlet of the cooling fan is connected to the flue through a cooling duct. The cooling duct flows through the heat exchanger and exchanges heat with the duct circuit inside the heat exchanger, so that the heat from the condenser can enter the dryer for its use, thereby improving the energy utilization rate, reducing energy consumption, and achieving energy saving and emission reduction. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the waste heat recovery system according to Embodiment 1 of this utility model;

[0014] Figure 2 This is a schematic diagram of the waste heat recovery system according to Embodiment 2 of this utility model. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0016] Example 1:

[0017] like Figure 1 As shown, the waste heat recovery system of the refrigerated range hood in this embodiment includes a fume extraction module and a refrigeration module 2. The fume extraction module includes a fume extraction fan 1, and the outlet of the fume extraction fan 1 is connected to a flue pipe 3, which is connected to a common flue 16. The refrigeration module 2 includes a compressor 21, a condenser 22, an evaporator 23, a cooling fan 24, and an indoor unit fan 25. The compressor 21, condenser 22, and evaporator 23 are connected through a refrigerant pipeline 26. A throttling valve 27 is installed on the refrigerant pipeline 26 between the condenser 22 and the evaporator 23. The cooling fan 24 is used to dissipate heat from the condenser 22, and the indoor unit fan 25 is used to blow out cold air from the evaporator 23 side. The above structure is the same as that of existing refrigerated range hoods and will not be described in detail here.

[0018] The waste heat recovery system in this embodiment also includes a heat exchanger 4 and a dryer 5. The dryer 5 and the heat exchanger 4 are connected by a duct circuit 6. The outlet of the cooling fan 24 is connected to the flue 3 through a cooling duct 7, and the cooling duct 7 flows through the heat exchanger 4 and exchanges heat with the duct circuit 6 inside the heat exchanger 4. During the operation of the cooling range hood, the refrigerant transfers heat to the air on the side of the cooling fan 24 at the condenser 22. This air is blown out by the cooling fan 24 and enters the cooling duct 7, and then enters the heat exchanger 4. The heat from the cooling duct 7 is transferred to the air in the duct circuit 6. Afterward, the cooled air in the cooling duct 7 merges with the oil fumes in the flue 3 and is discharged into the common flue 16. The heated air returns to the dryer 5 for drying food or clothes.

[0019] Example 2:

[0020] like Figure 2As shown, the waste heat recovery system of the refrigerated range hood in this embodiment is based on the first embodiment, with a three-way valve 8 installed at the outlet of the cooling fan 24 to split the airflow from the cooling fan 24 into two locations. Specifically, the inlet end of the three-way valve 8 is connected to the outlet of the cooling fan 24, and the first outlet end of the three-way valve 8 is connected to the cooling duct 7. The heat exchange structure between the cooling duct 7 and the heat exchanger 4 is the same as in the first embodiment. The second outlet end of the three-way valve 8 is connected to the common flue 16 through the collector 9. A thermoelectric battery 10 is installed on the collector 9. The thermoelectric battery 10 includes a PN junction. The P end and N end of the thermoelectric battery 10 are connected through a conductor and sandwiched between two ceramic plates 101. The two ends of the thermoelectric battery 10 are connected to a charging device through a voltage regulator 11. The charging device can be a power bank 12. A radiator 13 is installed directly above the thermoelectric battery 10. The radiator 13 is a finned radiator. The thermoelectric battery cooling fan 14 is located directly above the radiator 13. The air outlet of the thermoelectric battery cooling fan 14 is connected to the common flue 16.

[0021] The waste heat recovery system also includes a common air duct 15, a heat dissipation air duct 7 connected to a common flue 16 through the common air duct 15, an air outlet of the thermoelectric battery 10 connected to a common flue 16 through the common air duct 15, and a heat collector 9 connected to a common flue 16 through the common air duct 15.

[0022] The waste heat recovery system of the cooling range hood in this embodiment splits the airflow from the cooling fan 24 into two locations via a three-way valve 8. Besides providing heat to the dryer as in Embodiment 1, it can also charge the power bank 12. The working principle is as follows: The heat from the second outlet of the three-way valve 8 heats one end of the PN junction. Under the influence of the temperature gradient, electrons in the N-type material and holes in the P-type material begin to move, forming a potential difference. The two ends of the thermoelectric battery 10 are connected to the power bank 12 via a voltage regulator 11, allowing charging of mobile phones and other devices while cooking in the kitchen. The other side of the thermoelectric battery 10 dissipates heat through a radiator 13, and the thermoelectric battery cooling fan 14 carries away the generated heat, which is finally discharged into the common flue 16 through the common duct 15.

[0023] When the system is running, users can choose whether to heat the dryer or charge the power bank according to their needs, so that the excess heat of the condenser 22 can be effectively and rationally utilized, achieving energy saving and emission reduction.

Claims

1. A waste heat recovery system for a refrigerated range hood, comprising a range hood module and a refrigeration module (2), wherein the range hood module includes a range hood fan (1), the outlet of which is connected to a flue pipe (3), and the refrigeration module (2) includes a compressor (21), a condenser (22) and an evaporator (23), a cooling fan (24) and an indoor fan (25), wherein the compressor (21), the condenser (22) and the evaporator (23) are connected by a refrigerant pipe (26), the cooling fan (24) is used to dissipate heat from the condenser (22), and the indoor fan (25) is used to blow out cold air from the evaporator (23), characterized in that: It also includes a heat exchanger (4) and a dryer (5). The dryer (5) and the heat exchanger (4) are connected by a duct circuit (6). The outlet of the heat dissipation fan (24) is connected to the flue (3) through a heat dissipation duct (7). The heat dissipation duct (7) flows through the heat exchanger (4) and exchanges heat with the duct circuit (6) inside the heat exchanger (4).

2. The waste heat recovery system of the refrigerated range hood according to claim 1, characterized in that: A three-way valve (8) is installed at the outlet of the cooling fan (24). The inlet end of the three-way valve (8) is connected to the outlet of the cooling fan (24). The first outlet end of the three-way valve (8) is connected to the cooling duct (7). The second outlet end of the three-way valve (8) is connected to the flue (3) through the collector (9). A thermoelectric battery (10) is installed on the collector (9). The two ends of the thermoelectric battery (10) are connected to the charging device through the voltage regulator (11).

3. The waste heat recovery system of the refrigerated range hood according to claim 2, characterized in that: The thermoelectric battery (10) includes a PN junction. The P-end and N-end of the thermoelectric battery (10) are connected by a conductor and sandwiched between two ceramic plates (101).

4. The waste heat recovery system of the refrigerated range hood according to claim 2, characterized in that: The charging device is a power bank (12).

5. The waste heat recovery system of the refrigerated range hood according to claim 2, characterized in that: A radiator (13) is installed on the thermoelectric battery (10), and a thermoelectric battery cooling fan (14) is installed near the radiator (13). The air outlet of the thermoelectric battery cooling fan (14) is connected to the smoke pipe (3).

6. The waste heat recovery system of the refrigerated range hood according to claim 5, characterized in that: It also includes a common air duct (15), the heat dissipation air duct (7) is connected to the common flue (16) through the common air duct (15), the air outlet of the thermoelectric battery (10) is connected to the common flue (16) through the common air duct (15), and the heat collector (9) is connected to the common flue (16) through the common air duct (15).

7. The waste heat recovery system of the refrigerated range hood according to claim 5, characterized in that: The radiator (13) is a finned radiator, and the thermoelectric battery cooling fan (14) is located directly above the finned radiator.

8. The waste heat recovery system of the refrigerated range hood according to any one of claims 1 to 7, characterized in that: A throttling valve (27) is installed on the refrigerant line (26) between the condenser (22) and the evaporator (23).

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