Heat dissipation structure for frequency conversion air source heat pump unit module board
By combining air-cooled and liquid-cooled radiator, the refrigerant flow is controlled by using an electric three-way valve, which solves the problem of heat dissipation of the module board of the variable frequency air source heat pump unit affecting the system performance, and achieves a stable and low-cost heat dissipation effect.
Patent Information
- Application Number
- CN202422377806.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-09-29
AI Technical Summary
In the prior art, the heat dissipation method of the module board of the variable frequency air source heat pump unit affects the system performance and is costly, especially in high-temperature heating conditions, the heat dissipation effect is not good.
The radiator is adopted that combines air-cooled and liquid-cooled structures. The refrigerant flow is controlled through an electric three-way valve to achieve constant temperature of the module board, avoiding all the refrigerant on the main road to be cooled. It is designed as a U-shaped refrigerant circulation pipeline, and heat dissipation is performed with the fan's own air.
It achieves stable heat dissipation effect under different working conditions, reduces module temperature, avoids system performance losses, is cheap and easy to install.
Smart Images
Figure CN223191872U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of heat dissipation equipment, and in particular relates to a heat dissipation structure for a module plate of a variable frequency air source heat pump unit. Background Art
[0002] There are two traditional methods for cooling the module boards of variable frequency air source heat pump units: one is to use the main unit fan alone for heat dissipation and cooling. The heat dissipation effect is closely related to the fan speed. Especially in high-temperature heating conditions, due to the low fan speed, the module heat dissipation effect will be greatly reduced, affecting the main unit performance. The other is to use copper tubes and aluminum sheets alone for heat dissipation. To achieve a higher heat dissipation effect, the copper tubes are bent multiple times to increase the heat exchange area. This method relies on the main circuit to dissipate heat, and a portion of the cooling capacity is used for module heat dissipation, which increases the pressure loss of the main circuit of the system. Regardless of the operating conditions, the unit's cooling and heating performance will be significantly reduced. Summary of the Invention
[0003] The utility model provides a heat dissipation structure for a module plate of a variable frequency air source heat pump unit, which solves the problems of the heat dissipation mode of the module plate in the prior art, such as the influence on system performance and high cost.
[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a heat dissipation structure for a module plate of a variable frequency air source heat pump unit, the variable frequency air source heat pump unit having an outdoor fan, including a radiator and a three-way valve, the radiator being connected to one side of the module plate, the radiator including a base, heat dissipation fins, and a refrigerant circulation pipeline, the inlet of the refrigerant circulation pipeline being connected to the first port of the three-way valve, the outlet of the refrigerant circulation pipeline being connected to the second port of the three-way valve, the third port of the three-way valve being connected to the indoor side heat exchanger of the variable frequency air source heat pump unit, and the second port of the three-way valve being connected to the outdoor side heat exchanger of the variable frequency air source heat pump unit.
[0005] Preferably, the refrigerant circulation pipeline is a U-shaped structure and is inserted into the base. The length of the refrigerant circulation pipeline is 480 mm and the diameter is 15.88 mm.
[0006] Preferably, the heat dissipation fins are fixed on the base, and the spacing between the heat dissipation fins is 2 mm.
[0007] Preferably, the base has screw holes for mounting the module plate.
[0008] Compared with the existing technology, the beneficial effects of the utility model are: it has both air-cooling structure and liquid-cooling structure, the radiator is small in size, simple to install and low in cost; the electric three-way valve proportionally controls the flow of refrigerant flowing into the radiator, which can keep the module at a constant temperature, work more stably, and avoid the main refrigerant being used entirely for module cooling, resulting in performance loss. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 This is a schematic diagram of the overall structure of the heat dissipation structure of an embodiment of the utility model;
[0010] Figure 2 This is a schematic diagram of the three-dimensional structure of the radiator according to an embodiment of the utility model;
[0011] Figure 3 This is a schematic diagram of the bottom of the radiator according to an embodiment of the present invention.
[0012] In the figure: radiator 1, three-way valve 2, module plate 3, outdoor fan 4, base 11, heat dissipation fins 12, refrigerant circulation pipeline 13, first port 21, second port 22, and third port 23. DETAILED DESCRIPTION
[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0014] See also Figure 1-3 The utility model provides the following technical solutions: a heat dissipation structure for a module plate of a variable frequency air source heat pump unit, the variable frequency air source heat pump unit having an outdoor fan 4, including a radiator 1, a three-way valve 2, the three-way valve 2 being an electric three-way valve, the radiator 1 being connected to one side of a module plate 3, the radiator 1 including a base 11, heat dissipation fins 12, and a refrigerant circulation pipeline 13, the inlet of the refrigerant circulation pipeline 13 being connected to a first port 21 of the three-way valve 2, the outlet of the refrigerant circulation pipeline 13 being connected to a second port 22 of the three-way valve 2, the third port 23 of the three-way valve 2 being connected to the indoor side heat exchanger of the variable frequency air source heat pump unit, and the second port 22 of the three-way valve 2 being connected to the outdoor side heat exchanger 5 of the variable frequency air source heat pump unit.
[0015] As a preferred implementation of this embodiment, the refrigerant circulation pipeline 13 is a U-shaped structure, inserted into the base 11, and the length of the refrigerant circulation pipeline 13 is 480 mm and the diameter is 15.88 mm.
[0016] Preferably, the heat dissipation fins 12 are fixed on the base 11 , and the heat dissipation fins 11 have a length of 84 mm, a width of 51 mm, and a spacing of 2 mm.
[0017] Preferably, the base 11 has screw holes 14 for mounting the module plate 3 .
[0018] During the heating cycle, the host monitors the IPM temperature in module board 3 in real time, sets the IPM temperature T (set to 80 degrees) as the target temperature SHt, and controls the refrigerant flow entering the radiator (equal to the main flow minus the radiator inlet flow) through the three-way valve 2 on the refrigerant main line to lower the temperature of module board 3. This control can adopt PI control, adjusting the opening of three-way valve 2 according to the difference between the target temperature SHt1 and the actual temperature T of module board 3 to ensure that the temperature of module board 3 is always below the target value. When the ambient temperature drops, if the temperature of module board 3 is always lower than the target temperature SHt2 (set to 60 degrees), the three-way valve 2 is closed, cutting off the radiator inlet flow, and only using the outdoor fan 4 for heat dissipation. During the cooling cycle, the refrigerant flows in the reverse direction, and the three-way valve 2 is controlled in the reverse direction. Whether in heating control or cooling control, the outdoor fan 4 is always in the open state.
[0019] The three-channel refrigerant flow path significantly improves heat dissipation. While dissipating heat in the same volume, the module temperature can be reduced by 20-30°C, enabling miniaturization and low cost. Furthermore, fins are added to the back of the module to dissipate heat through the fan's own airflow. When the external temperature is low, the refrigerant flow path can be closed to achieve cooling.
[0020] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A heat dissipation structure for a module board of a variable frequency air source heat pump unit, wherein the variable frequency air source heat pump unit has an outdoor fan, characterized in that: It includes a radiator and a three-way valve. The radiator is connected to one side of the module board. The radiator includes a base, heat dissipation fins, and a refrigerant circulation pipeline. The inlet of the refrigerant circulation pipeline is connected to the first port of the three-way valve, the outlet of the refrigerant circulation pipeline is connected to the second port of the three-way valve, the third port of the three-way valve is connected to the indoor side heat exchanger of the variable frequency air source heat pump unit, and the second port of the three-way valve is connected to the outdoor side heat exchanger of the variable frequency air source heat pump unit.
2. The heat dissipation structure for a variable frequency air source heat pump module board according to claim 1, characterized in that: The refrigerant circulation pipeline is a U-shaped structure and is inserted into the base. The length of the refrigerant circulation pipeline is 480 mm and the diameter is 15.88 mm.
3. The heat dissipation structure for a module board of a variable frequency air source heat pump unit according to claim 2, characterized in that: The heat dissipation fins are fixed on the base, and the spacing between the heat dissipation fins is 2 mm.
4. The heat dissipation structure for a module board of a variable frequency air source heat pump unit according to claim 1, characterized in that: The base is provided with screw holes for mounting the module plate.