A dual heat dissipation control system of a water source multi-connected air conditioner

Abstract

The utility model relates to water source multi-connected unit air conditioning technical field, concretely to a kind of double heat dissipation control system of water source multi-connected unit air conditioner, including casing, the inside fixed connection of casing has frequency conversion board, filter board power device, electric reactor is fixed on the casing of filter board power device back side, still include low-temperature heat dissipation light board, high-efficiency radiator, heat dissipation fan, heat dissipation fan is fixed on the casing above electric reactor, the casing of filter board power device back side is opened air outlet, the bottom of casing is opened air inlet, high-efficiency radiator is fixed on the casing above air inlet, low-temperature heat dissipation light board is fixed on the casing of frequency conversion board back side, low-temperature heat dissipation light board has refrigerant pipe and heat dissipation plate, the import of refrigerant pipe is equipped with flow limiting valve. Double heat dissipation combination mode (refrigerant heat dissipation+air-cooled heat dissipation) is used, the heat emission of power device inside electric control is guaranteed to the maximum degree, and the service life of component and complete machine is more reliable.

Description

Technical Field

[0001] This utility model relates to the field of water source multi-split air conditioning technology, specifically a dual heat dissipation control system for water source multi-split air conditioning. Background Technology

[0002] Current water source multi-split air conditioners primarily feature non-enclosed casings, with two main heat dissipation methods: one involves adding a cooling fan around the electrical control unit, which blows directly onto the heat-generating components, converting heat into hot air. This hot air is then transferred to the outside of the unit through ventilation holes on its surface, thus carrying away heat from the electrical control unit. In this case, the cooling fan operates simultaneously with the power supply, meaning it starts working as soon as the unit is powered on. The other method is refrigerant cooling, where a low-temperature refrigerant pipe is led to the bottom of the heat-generating components. Through a connection with a high-performance heat-conducting plate and a heat-conducting medium, the low-temperature refrigerant pipe and the heat-generating components are brought into close contact, thereby carrying away heat. In this case, there is no refrigerant limiting valve structure in front of the heat-conducting plate, meaning that the heat-conducting plate simultaneously cools down when the unit is running.

[0003] The power devices inside the electronic control unit will continuously generate heat during the operation of the machine. If a single air-cooling method is used, the heat cannot be transferred to the outside of the unit through air circulation due to the sealed structure of the whole unit, and will continue to accumulate inside the unit, resulting in low heat dissipation efficiency. If a single refrigerant cooling method is used, considering the structure of the components, the refrigerant cooling system cannot come into contact with all heat-generating components (such as electrolytic capacitors and reactors on the substrate), and cannot achieve the desired heat dissipation effect. Utility Model Content

[0004] The purpose of this utility model is to provide a dual heat dissipation control system for a water source multi-split air conditioner, which solves the problem that the existing single heat dissipation method cannot achieve effective heat dissipation and affects the service life of internal components and the whole unit.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A dual heat dissipation control system for a water source multi-split air conditioner includes a casing, a frequency converter board, a filter board power device fixedly connected to the inner side of the casing, and a reactor fixed on the casing behind the filter board power device. Based on the prior art, this utility model further improves upon the following: it also includes a heat dissipation plate, a high-efficiency radiator, and a cooling fan. The cooling fan is fixed on the casing above the reactor. An air outlet is opened on the casing behind the filter board power device, and an air inlet is opened at the bottom of the casing. A high-efficiency radiator is fixed above the air inlet. The heat dissipation plate is fixed on the back side of the frequency converter board. The heat dissipation plate has a refrigerant pipe and a heat dissipation plate. A flow restriction valve is provided at the inlet of the refrigerant pipe.

[0006] Preferably, a temperature sensor is provided at the air inlet.

[0007] Preferably, a temperature sensor is provided at the air outlet.

[0008] Preferably, a temperature sensor is provided at the frequency converter board.

[0009] Preferably, the high-efficiency heat sink is fixed on the heat dissipation plate, on the side opposite to where the refrigerant pipe is located.

[0010] Compared with the prior art, the beneficial effects of this utility model are: the heat dissipation structure uses a dual heat dissipation combination method (refrigerant heat dissipation + air cooling heat dissipation), which maximizes the heat dissipation of the power devices inside the electronic control system, making the service life of the components and the whole machine more reliable; by collecting the temperature at different locations by temperature sensors and setting the flow limiting valve, the dual heat dissipation system can determine the opening degree of the flow limiting valve and the on / off state of the cooling fan through control logic under different operating conditions, thereby minimizing working time, reducing power consumption, and improving energy efficiency. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the dual heat dissipation control system of the water source multi-split air conditioner of this utility model; Figure 2 This is another structural schematic diagram of the dual heat dissipation control system of the water source multi-split air conditioner of this utility model; Figure 3 This is a schematic diagram of the structure of the heat dissipation plate and high-efficiency heat sink of this utility model; Figure 4 This is a schematic diagram of the structure on the back of the casing of this utility model.

[0012] In the diagram: 1. Casing; 2. Inverter board; 3. Filter board; 4. Heat sink; 5. High-efficiency heat sink; 6. Cooling fan; 7. Air outlet; 8. Air inlet; 9. Flow limiting valve; 10. Reactor; 41. Refrigerant pipe; 42. Heat sink. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Example

[0014] Please see Figures 1 to 2A dual-heating control system for a water-source multi-split air conditioner includes a housing 1. A frequency converter 2 and a filter board power device 3 are fixedly connected to the inner side of the housing 1. A reactor 10 is fixed on the housing 1 on the back side of the filter board power device 3, i.e., on the outside of the housing 1. The system also includes a heat dissipation plate 4, a high-efficiency radiator 5, and a cooling fan 6. The cooling fan 6 is fixed on the housing 1 above the reactor 3. An air outlet 7 is opened on the housing 1 on the back side of the filter board power device 3, and an air inlet 8 is opened at the bottom of the housing 1. The high-efficiency radiator 5 is fixed above the air inlet 8. The heat dissipation plate 4 is fixed on the back side of the frequency converter 2, which is fixed on the housing 1. The heat dissipation plate 4 has a refrigerant pipe 41 and a heat dissipation plate 42. A flow restriction valve 9 is provided at the inlet of the refrigerant pipe 41. A temperature sensor is provided at the air inlet 8, the air outlet 7, and the frequency converter 2. The refrigerant pipe 41 is tightly bonded to the surface of the heat sink 42. When the cold room is in operation, low-temperature refrigerant passes through the refrigerant pipe 41, and the coldness of the refrigerant is conducted to the heat sink 42. The heat sink 42 is in contact with the back of the inverter board 1, which can directly reduce the heating temperature of the power devices on the inverter board 1.

[0015] In a preferred embodiment of this invention, the high-efficiency heat sink 5 is fixed to the lower part of the heat dissipation plate 4. In order to achieve contact between the heat dissipation plate 4 and the inverter board 2 to dissipate heat for the power devices of the inverter board, and to house the high-efficiency heat sink 5 inside the housing 1, above the air inlet 8, two notches are made on the housing 1. One notch is used for direct contact between the heat dissipation plate 4 and the inverter board 2, and the other notch is used to house the high-efficiency heat sink inside the housing 1.

[0016] In a preferred embodiment of this invention, the housing 1 has a cover plate (not shown in the figure), which is connected to the housing 1 by screws to seal the entire air conditioner. Figure 2 The arrows indicate the air intake and exhaust directions of the air conditioner. Normal temperature air enters through the air intake 8. After passing through the high-efficiency radiator 5, the normal temperature air becomes low temperature air. When the low temperature air passes through the main heat source, it neutralizes the heat dissipated by the heat source. After passing through the air outlet 7, it is blown out from above the reactor 10 as normal temperature air under the action of the cooling fan 6. At the same time, the inverter board 2 is in direct contact with the heat dissipation plate 4, which can also remove the main heat on the inverter board 2.

[0017] In this embodiment, the temperature values ​​collected by the 8 temperature sensors at the air inlet are denoted as A, the temperature values ​​collected by the 7 temperature sensors at the air outlet are denoted as B, and the temperature values ​​collected by the 2 temperature sensors on the inverter board are denoted as C. When BA (°C) value: >10, turn on the cooling fan, and set the flow restriction valve to 100% opening; (5,10], Turn on the cooling fan, and set the flow control valve to 70% opening; (2,5], Turn on the cooling fan, and set the flow control valve to 50% opening; [-2,2], Turn on the cooling fan, and set the flow control valve to 30% opening; <-2, turn off the cooling fan, and set the flow control valve to 100% opening; When the temperature protection value of device C is: >15, the flow control valve opening is 30%; (5,15], The flow control valve opening is 70%; <5, the flow control valve opening is 100%.

[0018] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual heat dissipation control system for a water source multi-split air conditioner, comprising a housing, wherein a frequency converter board, a filter board power device, and a reactor are fixedly connected to the inner side of the housing, and the reactor is fixed to the housing on the back side of the filter board power device, characterized in that: It also includes a heat dissipation plate, a high-efficiency heat sink, and a cooling fan. The cooling fan is fixed on the housing above the reactor. The housing on the back side of the power device of the filter board has an air outlet, and the bottom of the housing has an air inlet. The high-efficiency heat sink is fixed above the air inlet. The heat dissipation plate is fixed on the back side of the inverter board. The heat dissipation plate has a refrigerant pipe and a heat dissipation plate. A flow restriction valve is provided at the inlet of the refrigerant pipe.

2. The dual heat dissipation control system for a water source multi-split air conditioner according to claim 1, characterized in that: A temperature sensor is installed at the air inlet.

3. The dual heat dissipation control system for a water source multi-split air conditioner according to claim 1, characterized in that: A temperature sensor is installed at the air outlet.

4. The dual heat dissipation control system for a water source multi-split air conditioner according to claim 1, characterized in that: A temperature sensor is installed on the frequency converter board.

5. The dual heat dissipation control system for a water source multi-split air conditioner according to claim 1, characterized in that: The high-efficiency heat sink is fixed on the heat dissipation plate, on the opposite side of the heat dissipation plate where the refrigerant pipe is located.

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