Efficient heat exchange structure
By designing a tank and water pipe structure inside the casing of the range hood and using graphite blades to accelerate refrigerant condensation, the problem of low efficiency in small-volume heat exchange structures is solved, achieving efficient refrigerant heat exchange and oil mesh cooling.
Patent Information
- Application Number
- CN202421760536.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-07-23
AI Technical Summary
The heat exchange structure in existing range hoods is small in size, resulting in poor heat exchange efficiency and affecting the evaporator's cooling effect on the oil filter.
It adopts a high-efficiency heat exchange structure with a tank and an inlet pipe installed inside the shell. Water pipes and blades are installed around the outside of the tank. When the refrigerant flows inside and outside the tank, it exchanges heat through the blades and water pipes. The blades made of graphite are used to improve the heat transfer efficiency.
It achieves rapid heat exchange of gas-liquid mixed refrigerant, ensuring effective cooling of the oil filter by the evaporator and improving the cooling effect of the range hood.
Smart Images
Figure CN223179349U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of range hoods, and particularly relates to an efficient heat exchange structure. Background Art
[0002] A range hood, also known as an oil suction range hood or an exhaust range hood, is an indispensable electrical appliance in modern kitchens. Its main function is to absorb and discharge the oil fume, steam and harmful gases generated during cooking, so as to keep the kitchen air fresh and clean. In a range hood, by arranging an evaporator, the temperature of the oil mesh can be reduced, so that the effect of the oil mesh intercepting grease can be improved. A refrigerant circulates through the evaporator. The refrigerant enters the evaporator in a liquid state, absorbs heat and then exits the evaporator in a gas-liquid mixed state. The discharged refrigerant needs to be cooled and heat-exchanged and then enters the evaporator in a liquid state again. Therefore, the gas-liquid mixed refrigerant needs to pass through a heat exchange structure for cooling and heat exchange. Since the heat exchange structure needs to be installed in the range hood and its volume cannot be too large, but a heat exchange structure with a small volume has a poor heat exchange effect and cannot quickly convert the gas-liquid mixed refrigerant into a liquid state, thus affecting the cooling effect of the evaporator on the oil mesh. Summary of the Utility Model
[0003] Aiming at the deficiencies of the prior art, the utility model provides an efficient heat exchange structure, which can quickly exchange heat for the gas-liquid mixed refrigerant, so as to ensure the cooling effect of the evaporator on the oil mesh.
[0004] The technical solution of the utility model is realized as follows:
[0005] An efficient heat exchange structure includes a shell, a tank body, an input pipe, blades and a water pipe. The tank body is installed in the shell. The input pipe is inserted into the tank body. The input end of the input pipe passes through the tank body and the shell, and the output end of the input pipe extends towards the inner bottom of the tank body. The input end is used to introduce the refrigerant to be heat-exchanged. The upper part of the tank body has an air outlet communicating the inside of the tank body with the inside of the shell, and the lower part has a liquid outlet communicating the inside of the tank body with the inside of the shell. The lower part of the shell is provided with an output pipe communicating the inside of the shell with the outside. The outer wall of the tank body is provided with louver-shaped blades. The water pipe is wound around the outer wall of the tank body, and both ends of the water pipe extend out of the shell. Water flows through the water pipe, and the blades are in contact with the outer wall of the water pipe.
[0006] Preferably, the upper end of the input pipe is the input end, the lower end of the input pipe is the output end, the upper end of the water pipe is the water outlet end, and the lower end of the water pipe is the water inlet end.
[0007] Preferably, the water pipe includes an inner pipe and an outer pipe, and the outer pipe is sleeved outside the inner pipe.
[0008] Preferably, the pipe wall of the water pipe is spiral.
[0009] Preferably, the pipe walls of both the inner pipe and the outer pipe are spiral.
[0010] Preferably, the outer wall of the water pipe is closely attached to the inner wall of the housing.
[0011] Preferably, the blade is made of graphite.
[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: The efficient heat exchange structure includes a housing, a tank is installed inside the housing, an input pipe is inserted into the tank, a water pipe is wound around the outside of the tank, and a louver-shaped blade in contact with the water pipe is provided on the outer wall of the tank. The refrigerant to be heat-exchanged is introduced into the efficient heat exchange structure through the input end of the input pipe. The refrigerant to be heat-exchanged is in a gas-liquid mixed state. The refrigerant to be heat-exchanged enters the inside of the tank from the output end of the input pipe. In the gas-liquid mixed refrigerant, the gaseous refrigerant rises to the upper part of the tank. During the rising process, part of the gaseous refrigerant is heat-exchanged and condensed and then falls to the lower part of the tank, and the remaining part enters the area between the housing and the tank from the air outlet, and then is heat-exchanged and condensed and falls to the lower part of the housing, while the liquid refrigerant falls to the lower part of the tank and enters the area between the housing and the tank from the liquid outlet, and then is output along the output pipe. Among them, when the gaseous refrigerant flows in the area between the housing and the tank, it is blocked by the blade, which speeds up the condensation of the gaseous refrigerant. In addition, the setting of the blade increases the contact area with the water pipe, thereby enhancing the heat transfer between the tank and the water pipe, which is conducive to realizing the rapid heat exchange of the gaseous refrigerant, so as to ensure the cooling effect of the evaporator on the oil screen. Description of the Drawings
[0013] Figure 1 is a schematic structural diagram of the present utility model;
[0014] Figure 2 is a cross-sectional view of the water pipe in the present utility model.
[0015] Reference Signs in the Drawings:
[0016] 1 - housing; 2 - tank; 21 - air outlet; 22 - liquid outlet; 3 - input pipe; 31 - input end; 32 - output end; 4 - blade; 5 - water pipe; 51 - water outlet end; 52 - water inlet end; 53 - inner pipe; 54 - outer pipe; 6 - output pipe. Detailed Embodiments
[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.
[0018] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0019] Embodiment 1
[0020] See Figure 1 , the present utility model provides an efficient heat exchange structure, including a housing 1, a tank 2, an input pipe 3, blades 4, and a water pipe 5. The tank 2 is installed inside the housing 1. The input pipe 3 is inserted into the tank 2. The input end 31 of the input pipe 3 passes through the tank 2 and the housing 1. The output end 32 of the input pipe 3 extends towards the inner bottom of the tank 2. The refrigerant to be heat-exchanged is introduced into the input end 31. The upper part of the tank 2 has an air outlet 21 that communicates the inside of the tank 2 with the inside of the housing 1. The air outlet 21 can introduce the gas inside the tank 2 into the area between the housing 1 and the tank 2. The lower part has a liquid outlet 22 that communicates the inside of the tank 2 with the inside of the housing 1. The liquid outlet 22 can introduce the liquid inside the tank 2 into the area between the housing 1 and the tank 2. The lower part of the housing 1 is provided with an output pipe 6 that communicates the inside of the housing 1 with the outside. The outer wall of the tank 2 is provided with louver-shaped blades 4. The water pipe 5 is wound around the outer wall of the tank 2. Both ends of the water pipe 5 extend outside the housing 1. Water is passed through the water pipe 5. The blades 4 are in contact with the outer wall of the water pipe 5. The water inside the water pipe 5 is responsible for absorbing heat to achieve the heat exchange of the refrigerant.
[0021] During use, the refrigerant to be heat-exchanged discharged from the evaporator enters the high-efficiency heat-exchange structure through the input end 31 of the input pipe 3. The refrigerant to be heat-exchanged is in a gas-liquid mixed state. The refrigerant to be heat-exchanged enters the interior of the tank body 2 from the output end 32 of the input pipe 3. In the gas-liquid mixed refrigerant, the gaseous refrigerant rises to the upper part of the tank body 2. During the rising process, part of the gaseous refrigerant is heat-exchanged and condensed and then falls to the lower part of the tank body 2. The remaining part enters the area between the housing 1 and the tank body 2 from the air outlet 21, and then is heat-exchanged and condensed and falls to the lower part of the housing 1. The liquid refrigerant falls to the lower part of the tank body 2 and enters the area between the housing 1 and the tank body 2 from the liquid outlet 22, and then is output along the output pipe 6. Among them, when the gaseous refrigerant flows in the area between the housing 1 and the tank body 2, it is blocked by the blade 4, which speeds up the condensation of the gaseous refrigerant. In addition, the setting of the blade 4 increases the contact area with the water pipe 5, thereby enhancing the heat transfer between the tank body 2 and the water pipe 5, which is conducive to realizing rapid heat exchange of the gaseous refrigerant, so as to ensure the cooling effect of the evaporator on the oil screen.
[0022] During the entire heat-exchange process, the heat-exchanged refrigerant is in a liquid state and is concentrated in the lower part of the area between the housing 1 and the tank body 2 and is output from the output pipe 6.
[0023] The heat-exchange process is as follows: When the gaseous refrigerant is in the tank body 2, since the tank body 2 is provided with the blade 4 and the water pipe 5 in contact with the blade 4 is wound around the outside of the tank body 2 and water is passed through the water pipe 5, the heat of the gaseous refrigerant is transferred to the blade 4 through the tank body 2 and then from the blade 4 to the water pipe 5. The water in the water pipe 5 absorbs the heat and is heated into hot water and discharged. After the gaseous refrigerant releases heat, it is cooled into a liquid refrigerant; when the gaseous refrigerant is in the area between the housing 1 and the tank body 2, the gaseous refrigerant contacts the water pipe 5 and transfers the heat to the water pipe 5, and the water in the water pipe 5 absorbs the heat, or the gaseous refrigerant contacts the blade 4 and transfers the heat to the blade 4, and the blade 4 then transfers the heat to the water pipe 5, and the water in the water pipe 5 absorbs the heat, or the gaseous refrigerant contacts the outer wall of the tank body 2 and transfers the heat to the tank body 2, and the tank body 2 then transfers the heat to the blade 4 or the water pipe 5. Finally, the water in the water pipe 5 absorbs the heat, and the water in the water pipe 5 absorbs the heat and is heated into hot water and discharged.
[0024] Among them, the blade 4 is made of graphite, and graphite has high thermal conductivity, which can ensure the heat transfer effect of the blade 4. In addition, the plasticity of graphite enables the blade 4 to be made into a louver shape to meet the rapid heat dissipation requirements of the refrigerant.
[0025] Preferably, the upper end of the input pipe 3 is the input end 31, the lower end of the input pipe 3 is the output end 32, the upper end of the water pipe 5 is the water outlet end 51, and the lower end of the water pipe 5 is the water inlet end 52. The refrigerant enters the interior of the tank body 2 in a gas-liquid mixed state from the upper end of the input pipe 3, and after cooling and releasing heat, it is discharged from the liquid outlet 22 at the lower part of the tank body 2 in a liquid state; the cold water of the water pipe 5 enters from the water inlet end 52 at the lower end of the water pipe 5 and is discharged from the water outlet end 51 at the upper end of the water pipe 5 after absorbing heat; that is to say, the refrigerant flows from top to bottom, while the water flows from bottom to top. The flow paths of the two are opposite. When countercurrent heat transfer occurs, the temperature difference between the hot and cold fluids is the largest, which can achieve the maximum heat exchange effect, and it can also avoid the problem of insufficient heat exchange caused by too low or too high temperature crossover points, ensuring that heat can be effectively transferred throughout the heat exchange process. In addition, this countercurrent heat transfer setting can make the temperature distribution on the heat transfer surface more uniform, which helps to reduce thermal stress or heat loss caused by uneven temperature distribution. During actual use, a pipeline can be set to connect the input end 31 and the evaporator outlet, and the output pipe 6 is connected to the evaporator inlet, so that the refrigerant can circulate between this high-efficiency heat exchange structure and the evaporator.
[0026] Preferably, the pipe wall of the water pipe 5 is spiral. The spiral pipe wall can accelerate the flow of water and increase the heat transfer area of the water pipe 5, thereby accelerating heat exchange and improving the heat exchange effect.
[0027] Preferably, as Figure 2 , the water pipe 5 is a double-layer structure. The water pipe 5 includes an inner pipe 53 and an outer pipe 54, and the outer pipe 54 is sleeved outside the inner pipe 53. After the outer pipe 54 absorbs heat, it is transferred to the inner pipe 53, and the inner pipe 53 then transfers it to the cold water inside the pipe.
[0028] Preferably, the pipe walls of both the inner pipe 53 and the outer pipe 54 are spiral. The spiral pipe walls can accelerate the flow of water and increase the heat transfer area of the water pipe 5, thereby accelerating heat exchange and improving the heat exchange effect. Moreover, the contact area between the inner pipe 53 and the outer pipe 54 is larger, which can accelerate the heat transfer speed between the inner pipe 53 and the outer pipe 54, and thus improve the heat exchange efficiency.
[0029] Preferably, the outer wall of the water pipe 5 is closely attached to the inner wall of the housing 1. The housing 1 is in contact with the outside world, and the heat of the water pipe 5 can be transferred to the housing 1, which is beneficial to enhancing the heat exchange effect of the water pipe 5 and can avoid the temperature of the water pipe 5 from being too high.
[0030] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.
Claims
1. An efficient heat exchange structure, characterized in that it includes a housing (1), a tank (2), an input pipe (3), blades (4) and a water pipe (5). The tank (2) is installed inside the housing (1). The input pipe (3) is inserted into the tank (2). The input end (31) of the input pipe (3) passes through the tank (2) and the housing (1). The output end (32) of the input pipe (3) extends towards the inner bottom of the tank (2). The refrigerant to be heat-exchanged is introduced into the input end (31). The upper part of the tank (2) has an air outlet (21) connecting the inside of the tank (2) and the inside of the housing (1), and the lower part has a liquid outlet (22) connecting the inside of the tank (2) and the inside of the housing (1). The lower part of the housing (1) is provided with an output pipe (6) connecting the inside of the housing (1) and the outside. The outer wall of the tank (2) is provided with louver-shaped blades (4). The water pipe (5) is wound around the outer wall of the tank (2). Both ends of the water pipe (5) extend outside the housing (1). Water is passed through the water pipe (5). The blades (4) are in contact with the outer wall of the water pipe (5).
2. The efficient heat exchange structure according to claim 1, characterized in that the upper end of the input pipe (3) is the input end (31), the lower end of the input pipe (3) is the output end (32), the upper end of the water pipe (5) is the water outlet end (51), and the lower end of the water pipe (5) is the water inlet end (52).
3. The efficient heat exchange structure according to claim 1, characterized in that the water pipe (5) includes an inner pipe (53) and an outer pipe (54), and the outer pipe (54) is sleeved outside the inner pipe (53).
4. The efficient heat exchange structure according to claim 1, characterized in that the pipe wall of the water pipe (5) is spiral.
5. The efficient heat exchange structure according to claim 3, characterized in that the pipe walls of both the inner pipe (53) and the outer pipe (54) are spiral.
6. The efficient heat exchange structure according to claim 1, characterized in that the outer wall of the water pipe (5) is closely attached to the inner wall of the housing (1).
7. The efficient heat exchange structure according to any one of claims 1 to 6, characterized in that the blades (4) are made of graphite.