Flow resistance testing device of heat exchanger

Abstract

The utility model discloses a flow resistance testing device of a heat exchanger, which belongs to the technical field of heat exchanger performance testing and is used for solving the problem of low flow resistance testing precision in the prior art. The flow resistance testing device comprises a working medium temperature adjusting and liquid supplying unit, a liquid supplying pipeline, a resistance testing pipeline and a liquid returning pipeline, the working medium temperature adjusting and liquid supplying unit, the liquid supplying pipeline, the resistance measuring pipeline and the liquid returning pipeline are sequentially connected to form a heat exchange working medium circulation loop. A front pressure sensor, a heat exchange pipeline of the heat exchanger and a rear pressure sensor are sequentially arranged on the resistance measuring pipeline in the flowing direction of a heat exchange working medium; the number of the resistance measuring pipelines is multiple, and the multiple resistance measuring pipelines are connected in parallel. The device can be used for testing the flow resistance of the heat exchanger.

Description

Technical Field

[0001] This utility model belongs to the field of heat exchanger performance testing technology, and in particular relates to a flow resistance testing device for heat exchangers. Background Technology

[0002] In the prior art, the test device for the flow resistance of a heat exchanger typically includes a fluid pump, a pre-pressure gauge and a post-pressure gauge connected in sequence. The heat exchanger's heat exchange pipeline is located between the pre-pressure gauge and the post-pressure gauge. The pressure difference measured by the pre-pressure gauge and the post-pressure gauge is the flow resistance of the heat exchanger.

[0003] However, in practical applications, temperature affects the viscosity of the heat exchange medium, which in turn affects the flow resistance. If the effect of temperature on the flow resistance is not considered, the accuracy of the flow resistance test will be low. Utility Model Content

[0004] Based on the above analysis, the present invention aims to provide a flow resistance testing device for heat exchangers to solve the problem of low flow resistance testing accuracy in the prior art.

[0005] The purpose of this utility model is mainly achieved through the following technical solutions.

[0006] This utility model provides a flow resistance testing device for a heat exchanger, including a working fluid temperature control and liquid supply unit, a liquid supply pipeline, a resistance measuring pipeline, and a liquid return pipeline;

[0007] The working fluid temperature control and liquid supply unit, the liquid supply pipeline, the resistance measuring pipeline and the return liquid pipeline are connected in sequence to form a circulation loop of the heat exchange working fluid.

[0008] Along the flow direction of the heat exchange medium, a pre-pressure sensor, the heat exchanger's heat exchange pipeline, and a post-pressure sensor are sequentially installed on the resistance measuring pipeline.

[0009] There are multiple resistance measuring lines, which are connected in parallel.

[0010] Furthermore, the working fluid temperature control and supply unit includes a circulating pump, a temperature control component, and a unit filter connected sequentially along the flow direction of the heat exchange working fluid.

[0011] Furthermore, the flow resistance testing device also includes a liquid supply flow meter installed on the liquid supply line.

[0012] Furthermore, the flow resistance testing device also includes a flow meter installed on the resistance testing pipeline.

[0013] Furthermore, the flow resistance testing device also includes a temperature sensor located on the resistance measuring pipeline.

[0014] Furthermore, the flow resistance testing device also includes a liquid supply valve on the liquid supply line and / or a resistance measuring valve on the resistance measuring line. The liquid supply valve is used to control the connection or disconnection of the liquid supply line, and the resistance measuring valve is used to control the connection or disconnection of the resistance measuring line.

[0015] Furthermore, along the flow direction of the heat exchange medium, a resistance valve, a resistance flow meter, a temperature sensor, and a pre-pressure sensor are sequentially installed.

[0016] Furthermore, the flow resistance testing device also includes a liquid supply filter located on the liquid supply line.

[0017] Furthermore, the working fluid temperature control and supply unit is detachably connected to the supply pipeline.

[0018] Furthermore, the return liquid pipeline is detachably connected to the working fluid temperature control and supply unit.

[0019] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0020] A) The flow resistance testing device for heat exchangers provided by this utility model uses a working fluid temperature-regulating liquid supply unit as the working fluid supply unit for the heat exchange pipeline. The working fluid temperature-regulating liquid supply unit can adjust the temperature of the working fluid so as to measure the flow resistance of the heat exchange pipeline at different temperatures, thereby achieving a comprehensive test of the flow resistance and improving the accuracy of the flow resistance test.

[0021] B) The flow resistance testing device for heat exchangers provided by this utility model consists of a working fluid temperature control and supply unit, a supply pipeline, a resistance measuring pipeline, and a return pipeline connected in sequence to form a circulation loop for the heat exchange working fluid. The heat exchange working fluid passing through the heat exchange pipeline can be circulated back to the working fluid temperature control and supply unit, and reused after temperature adjustment by the working fluid temperature control and supply unit, thereby improving the utilization rate of the heat exchange working fluid.

[0022] C) The flow resistance testing device for heat exchangers provided by this utility model adopts a parallel connection of multiple resistance testing pipelines, which can realize the simultaneous testing of the flow resistance of multiple heat exchangers, effectively improving the testing efficiency of flow resistance.

[0023] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the embodiments described and the accompanying drawings, which are particularly pointed out. Attached Figure Description

[0024] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0025] Figure 1 This is a schematic diagram of the flow resistance testing device for a heat exchanger provided in Embodiment 1 of this utility model;

[0026] Figure 2 This is a schematic diagram of the working fluid temperature control and supply unit in the flow resistance testing device for the heat exchanger provided in Embodiment 1 of this utility model.

[0027] Figure label:

[0028] 1-Working fluid temperature control and supply unit; 101-Circulation pump; 102-Temperature control component; 103-Unit filter; 2-Supply pipeline; 3-Return pipeline; 4-Supply flow meter; 5-Supply filter; 6-First resistance valve; 7-First resistance flow meter; 8-First temperature sensor; 9-First pre-pressure sensor; 10-First heat exchanger; 11-First post-pressure sensor; 12-Second resistance valve; 13-Second resistance flow meter; 14-Second temperature sensor; 15-Second pre-pressure sensor; 16-Second heat exchanger; 17-Second post-pressure sensor. Detailed Implementation

[0029] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0030] Example 1

[0031] This embodiment provides a flow resistance testing device for a heat exchanger. See [link to documentation]. Figure 1 It includes a working fluid temperature control and liquid supply unit 1, a liquid supply pipeline 2, a resistance measuring pipeline and a return liquid pipeline 3. The working fluid temperature control and liquid supply unit 1, the liquid supply pipeline 2, the resistance measuring pipeline and the return liquid pipeline 3 are connected in sequence to form a circulation loop of the heat exchange working fluid. Among them, the front pressure sensor, the heat exchange pipeline of the heat exchanger and the rear pressure sensor are arranged in sequence along the flow direction of the heat exchange working fluid on the resistance measuring pipeline.

[0032] For example, in order to improve the testing efficiency of flow resistance, the number of the above-mentioned flow resistance testing pipes is multiple, for example, 2 to 4, and the multiple flow resistance testing pipes are connected in parallel. In this way, the flow resistance of multiple heat exchangers can be tested simultaneously, effectively improving the testing efficiency of flow resistance.

[0033] During implementation, the working fluid temperature control and supply unit 1 is turned on. The heat exchange working fluid in the working fluid temperature control and supply unit 1 is supplied into the resistance measuring pipeline through the supply pipeline 2. In the resistance measuring pipeline, the heat exchange flows sequentially through the pre-pressure sensor, the heat exchange pipeline and the post-pressure sensor. The pre-pressure sensor detects the pre-pressure before the heat exchange pipeline, and the post-pressure sensor detects the post-pressure after the heat exchange pipeline. The difference between the pre-pressure and the post-pressure is the flow resistance of the heat exchanger.

[0034] Compared with the prior art, the flow resistance testing device for heat exchangers provided in this embodiment has several advantages. First, it uses a working fluid temperature-regulating supply unit 1 as the working fluid supply unit for the heat exchange pipeline. The working fluid temperature-regulating supply unit 1 can adjust the temperature of the working fluid so that the flow resistance of the heat exchange pipeline at different temperatures can be measured, thereby achieving comprehensive flow resistance testing and improving the accuracy of flow resistance testing. Second, since the working fluid temperature-regulating supply unit 1, the supply pipeline 2, the resistance measuring pipeline, and the return pipeline 3 are connected in sequence to form a circulation loop for the working fluid, the working fluid passing through the heat exchange pipeline can be circulated back to the working fluid temperature-regulating supply unit 1 and reused after temperature adjustment by the working fluid temperature-regulating supply unit 1, thereby improving the utilization rate of the working fluid. Third, by using multiple resistance measuring pipelines connected in parallel, the flow resistance of multiple heat exchangers can be tested simultaneously, effectively improving the flow resistance testing efficiency.

[0035] For the structure of the working fluid temperature control and supply unit 1, see [link to documentation]. Figure 2 It includes a circulating pump 101, a temperature control assembly 102 (e.g., a shell-and-tube heat exchanger), and a unit filter 103 connected in sequence along the flow direction of the heat exchange medium. The circulating pump 101 can improve the circulation power of the circulation loop and ensure the smooth flow of the heat exchange medium in the circulation loop. The temperature control assembly 102 can effectively regulate the temperature of the heat exchange medium. The unit filter 103 can filter the heat exchange medium discharged from the temperature control assembly 102 and reduce the possibility of blockage in subsequent pipelines.

[0036] In order to know the flow rate of the heat exchange medium in the liquid supply line 2 in real time, the flow resistance testing device of the heat exchanger also includes a liquid supply flow meter 4 installed on the liquid supply line 2, and the flow rate of the heat exchange medium in the liquid supply line 2 is detected in real time by the liquid supply flow meter 4.

[0037] Accordingly, in order to understand the flow rate of the heat exchange medium in the resistance measuring pipeline in real time, the flow resistance testing device of the heat exchanger also includes a resistance measuring flow meter installed on the resistance measuring pipeline, which detects the flow rate of the heat exchange medium in the resistance measuring pipeline in real time.

[0038] It is worth noting that the heat exchange medium may cool down during its flow. In order to understand the actual temperature of the heat exchange medium flowing into the heat exchange pipeline in real time, the flow resistance testing device of the heat exchanger also includes a temperature sensor installed on the resistance measuring pipeline. The temperature sensor can detect the actual temperature of the heat exchange medium in the resistance measuring pipeline in real time.

[0039] Similarly, in order to control the opening and closing of each pipeline, the flow resistance testing device of the heat exchanger also includes a liquid supply valve on the liquid supply pipeline 2 and / or a resistance measuring valve on the resistance measuring pipeline. The liquid supply valve can control the connection or disconnection of the liquid supply pipeline 2, and the resistance measuring valve can control the connection or disconnection of the resistance measuring pipeline.

[0040] For example, along the flow direction of the heat exchange medium, a resistance valve, a resistance flow meter, a temperature sensor, and a pre-pressure sensor are arranged in sequence.

[0041] In order to perform secondary filtration of the heat exchange medium flowing into the resistance testing pipeline, the heat exchanger's flow resistance testing device also includes a liquid supply filter 5 installed on the liquid supply pipeline 2. By installing the liquid supply filter 5, the heat exchange medium flowing into the resistance testing pipeline can be filtered secondary, further reducing the possibility of blockage in subsequent pipelines.

[0042] To facilitate the movement of the flow resistance testing device for the heat exchanger, for example, the working fluid temperature-regulating supply unit 1 is detachably connected to the supply pipeline 2, and the return pipeline 3 is detachably connected to the working fluid temperature-regulating supply unit 1. In this way, the working fluid temperature-regulating supply unit 1 is independently set up from other pipelines. When it is necessary to move the flow resistance testing device of the heat exchanger, the working fluid temperature-regulating supply unit 1 can be separated from the supply pipeline 2 and the return pipeline 3, and the supply pipeline 2 can be connected to the return pipeline 3. This makes the flow resistance testing device of the heat exchanger divided into two independent components, facilitating movement.

[0043] For example, there are two resistance measurement pipelines, namely a first resistance measurement pipeline and a second resistance measurement pipeline. The first resistance measurement pipeline includes a first resistance measurement valve 6, a first resistance measurement flow meter 7, a first temperature sensor 8, a first pre-pressure sensor 9, and a first post-pressure sensor 11 arranged sequentially along the heat exchange medium. The first heat exchanger 10 is located between the first pre-pressure sensor 9 and the first post-pressure sensor 11. Similarly, the second resistance measurement pipeline includes a second resistance measurement valve 12, a second resistance measurement flow meter 13, a second temperature sensor 14, a second pre-pressure sensor 15, and a second post-pressure sensor 17 arranged sequentially along the heat exchange medium. The second heat exchanger 16 is located between the second pre-pressure sensor 15 and the second post-pressure sensor 17.

[0044] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A flow resistance testing device for a heat exchanger, characterized in that, It includes a working fluid temperature control and supply unit, a supply pipeline, a resistance measuring pipeline, and a return pipeline; The working fluid temperature control and liquid supply unit, the liquid supply pipeline, the resistance measuring pipeline and the liquid return pipeline are connected in sequence to form a circulation loop of the heat exchange working fluid. The pressure sensor, the heat exchanger's heat exchange pipeline, and the pressure sensor are sequentially installed along the flow direction of the heat exchange medium on the resistance measuring pipeline. The number of resistance measuring pipelines is multiple, and the multiple resistance measuring pipelines are connected in parallel.

2. The flow resistance testing device for a heat exchanger according to claim 1, characterized in that, The working fluid temperature control and supply unit includes a circulating pump, a temperature control component, and a unit filter connected in sequence along the flow direction of the heat exchange working fluid.

3. The flow resistance testing device for a heat exchanger according to claim 1, characterized in that, The flow resistance testing device also includes a liquid supply flow meter installed on the liquid supply pipeline.

4. The flow resistance testing device for a heat exchanger according to claim 1, characterized in that, The flow resistance testing device also includes a flow meter installed on the flow resistance testing pipeline.

5. The flow resistance testing device for a heat exchanger according to claim 4, characterized in that, The flow resistance testing device also includes a temperature sensor installed on the flow resistance testing pipeline.

6. The flow resistance testing device for a heat exchanger according to claim 5, characterized in that, The flow resistance testing device further includes a liquid supply valve on the liquid supply line and / or a resistance measuring valve on the resistance measuring line. The liquid supply valve is used to control the connection or disconnection of the liquid supply line, and the resistance measuring valve is used to control the connection or disconnection of the resistance measuring line.

7. The flow resistance testing device for a heat exchanger according to claim 6, characterized in that, Along the flow direction of the heat exchange medium, the resistance valve, resistance flow meter, temperature sensor and pre-pressure sensor are arranged in sequence.

8. The flow resistance testing apparatus for a heat exchanger according to any one of claims 1 to 7, characterized in that, The flow resistance testing device also includes a liquid supply filter installed on the liquid supply pipeline.

9. The flow resistance testing apparatus for a heat exchanger according to any one of claims 1 to 7, characterized in that, The working fluid temperature-regulating liquid supply unit is detachably connected to the liquid supply pipeline.

10. The flow resistance testing apparatus for a heat exchanger according to any one of claims 1 to 7, characterized in that, The return liquid pipeline is detachably connected to the working fluid temperature control and supply unit.

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