Heat dissipation apparatus, heat dissipation control method, and controller

Patent metadata

Field	Value
Publication number	US-10271457-B2
Application number	US-201615368038-A
Country	US
Kind code	B2
Filing date	Dec 2, 2016
Priority date	Jun 3, 2014
Publication date	Apr 23, 2019
Grant date	Apr 23, 2019

Abstract

A heat dissipation controller is connected to a sensor and a water pump such that the controller correspondingly adjusts the water pump according to the current pressure difference and a preset pressure difference, to control a flow capacity of coolant flowing into a branch water pipe, until an absolute value of a difference between the current pressure difference and the preset pressure difference is less than or equal to a preset error amount. The controller can adjust the flow capacity of the coolant flowing into the branch water pipe to effectively ensure that flow capacities of coolant in all branch water pipes are distributed evenly, and to effectively improve stability of the heat dissipation apparatus.

First claim

What is claimed is:

1. A heat dissipation apparatus, comprising:
a main water pipe;
a heat exchanger connected to the main water pipe;
a plurality of branch water pipes connected to the main water pipe, each branch water pipe of the plurality of branch water pipes configured to cool a board of a plurality of boards mounted on the branch water pipe;
a water pump disposed on the main water pipe;
a sensor disposed on the main water pipe or on one or more of the plurality of branch water pipes, the sensor configured to obtain inflow pressure of coolant flowing into the plurality of branch water pipes and outflow pressure of coolant flowing out of the plurality of branch water pipes; and
a controller connected to the sensor and the water pump, the controller configured to:
determine a preset pressure difference, the preset pressure difference a maximum value of initial pressure differences of the plurality of boards, the initial pressure differences predetermined to ensure that each component on each board of the plurality of boards runs without derating;
determine a current pressure difference between the inflow pressure and the outflow pressure; and
adjust the water pump to control a flow capacity of the coolant flowing into the plurality of branch water pipes until an absolute value of a difference between the current pressure difference and the preset pressure difference is less than or equal to a preset error amount.

2. The heat dissipation apparatus of claim 1 , wherein a value range of the preset error amount is greater than or equal to 0, and is less than or equal to 10% of the preset pressure difference.

3. The heat dissipation apparatus of claim 1 , wherein the main water pipe comprises an inflow pipe and a backflow pipe, wherein the plurality of branch water pipes comprises a flow dividing pipe, a flow collecting pipe, and parallel branch pipes, wherein the flow dividing pipe is connected to both the inflow pipe and the parallel branch pipes such that coolant in the inflow pipe flows into the parallel branch pipes through the flow dividing pipe, and wherein the flow collecting pipe is connected to both the backflow pipe and the parallel branch pipes such that coolant in the parallel branch pipes flows into the backflow pipe through the flow collecting pipe.

4. The heat dissipation apparatus of claim 3 , wherein the sensor is a pressure sensor or a differential pressure sensor.

5. The heat dissipation apparatus of claim 4 , wherein the pressure sensor comprises a first pressure sensor and a second pressure sensor, wherein the first pressure sensor is disposed on the inflow pipe or the flow dividing pipe, and is configured to obtain inflow pressure of coolant flowing into the flow dividing pipe, wherein the second pressure sensor is disposed on the backflow pipe or the flow collecting pipe, and is configured to obtain outflow pressure of coolant flowing out of the flow collecting pipe, wherein the controller is connected to both the first pressure sensor and the second pressure sensor, and wherein the controller is configured to calculate the current pressure difference according to the inflow pressure that has been obtained by the first pressure sensor and the outflow pressure that has been obtained by the second pressure sensor.

6. The heat dissipation apparatus of claim 4 , wherein the differential pressure sensor comprises a first pressure interface, a second pressure interface, and a calculation module, wherein the first pressure interface is disposed on the inflow pipe or the flow dividing pipe, and is configured to obtain inflow pressure of coolant flowing into the flow dividing pipe, wherein the second pressure interface is disposed on the backflow pipe or the flow collecting pipe, and is configured to obtain outflow pressure of coolant flowing out of the flow collecting pipe, wherein the calculation module is connected to both the first pressure interface and the second pressure interface, wherein the calculation module is configured to calculate a difference between the inflow pressure and the outflow pressure, wherein the controller is connected to the differential pressure sensor, wherein the controller is configured to obtain the difference between the inflow pressure and the outflow pressure that has been calculated by the calculation module, and wherein the difference is the current pressure difference.

7. The heat dissipation apparatus according to claim 3 , wherein a flowmeter is disposed on the inflow pipe or the backflow pipe, wherein the flowmeter is configured to obtain a current flow capacity of coolant in the main water pipe, wherein the controller is connected to the flowmeter, wherein the controller is configured to determine a fully loaded flow capacity, wherein the fully loaded flow capacity is a flow capacity of the coolant in the main water pipe, existing when the absolute value of the difference between the current pressure difference and the preset pressure difference is less than or equal to the preset error amount and a board that meets a preset condition is mounted on each of the branch pipes, wherein the preset condition is that the initial pressure difference that has been set for the board mounted on the branch pipe is less than or equal to the preset pressure difference, wherein the controller is further configured to obtain the current flow capacity and determine that a quotient of the fully loaded flow capacity and a total quantity of the branch pipes is a branch flow capacity, wherein the controller determines a quotient of a difference between the fully loaded flow capacity and the current flow capacity and the branch flow capacity, and determines whether the quotient of the difference between the fully loaded flow capacity and the current flow capacity and the branch flow capacity is an integer, and wherein when the quotient of the difference between the fully loaded flow capacity and the current flow capacity and the branch flow capacity is an integer, the controller determines that the quotient is a quantity of boards that are additionally mountable on the branch pipes and that meet the preset condition.

8. The heat dissipation apparatus according to claim 3 , wherein a flowmeter is disposed on the inflow pipe or the backflow pipe, wherein the flowmeter is configured to obtain a current flow capacity of coolant in the main water pipe, wherein the controller is connected to the flowmeter, wherein the controller is configured to determine a fully loaded flow capacity, wherein the fully loaded flow capacity is a flow capacity of the coolant in the main water pipe, existing when the absolute value of the difference between the current pressure difference and the preset pressure difference is less than or equal to the preset error amount and a board that meets a preset condition is mounted on each of the branch pipes, wherein the preset condition is that the initial pressure difference that has been set for the board mounted on the branch pipe is less than or equal to the preset pressure difference, wherein the controller is further configured to obtain the current flow capacity and determine that a quotient of the fully loaded flow capacity and a total quantity of the branch pipes is a branch flow capacity, wherein the controller determines a quotient of a difference between the fully loaded flow capacity and the current flow capacity and the branch flow capacity, and determines whether the quotient of the difference between the fully loaded flow capacity and the current flow capacity and the branch flow capacity is an integer, and when the quotient of the difference between the fully loaded flow capacity and the current flow capacity and the branch flow capacity is not an integer, the controller determines that an integer par

Assignees

• Huawei Tech Co Ltd

Inventors

• Liu Yunju
• Ding Junfeng
• Li Yao

Classifications

• H05K7/20272

  Accessories for moving fluid, for expanding fluid, for connecting fluid conduits, for distributing fluid, for removing gas or for preventing leakage, e.g. pumps, tanks or manifolds · CPC title

• H05K7/20781 Primary

  within cabinets for removing heat from server blades · CPC title

• H05K7/20281 Primary

  Thermal management, e.g. liquid flow control · CPC title

• F24F3/08

  with separate supply and return lines for hot and cold heat-exchange fluids {i.e. so-called "4-conduit" system} · CPC title

• F24F1/24

  Cooling of electric components · CPC title