Device and method for measuring parameters of water pump of air-conditioning water system

Abstract

The invention discloses a device for measuring parameters of a water pump of an air-conditioning water system, which comprises an air-conditioning host, the output end of the air-conditioning host is connected with a plurality of air-conditioning indoor units, the output ends of the plurality of air-conditioning indoor units are connected with a pipeline assembly, and the other side of the pipeline assembly is installed on the air-conditioning host. A first pressure gauge, a water pump, a second pressure gauge, a regulating valve, a third pressure gauge and a flow meter are installed on the pipeline assembly. Water pump parameters (flow and lift) are measured through the first pressure gauge, the second pressure gauge, the adjusting valve, the third pressure gauge and the flow meter, a proper water pump is selected according to the parameters after measurement and replaced for use, the actual required value of a unit is achieved, and the water pump can be adjusted by detecting the flow value and the pressure in front of and behind the water pump. Accurate water pump parameters, such as flow and lift, capable of guaranteeing the system operation effect can be obtained, surplus values are reduced or no surplus values exist, the power consumption of the water pump is reduced, and the energy-saving effect is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of heating, ventilation and air conditioning, and in particular relates to a device and method for measuring water pump parameters of an air conditioning water system. Background Art

[0002] HVAC is an air conditioner with heating, ventilation and air conditioning functions, which is mainly responsible for indoor heating, ventilation and air conditioning. It covers all functions of heating, ventilation and air conditioning, and is usually used in medium and large industrial buildings or office buildings. It can control the temperature and humidity of the air to make the indoor environment more comfortable.

[0003] The HVAC water system is an important part of HVAC. It uses water as a medium to transfer heat and cold, and is a system that transfers heat and cold between and within air-conditioned buildings. However, the parameters (flow rate, head) of the water pump selected in the HVAC water system design are theoretically calculated based on the host resistance value and pipeline length resistance value provided by the equipment manufacturer, and the surplus coefficient is considered after the calculation. Therefore, the flow rate and head of the water pump are relatively high, which is safe for the operation of the air-conditioning system. However, the high flow rate and head of the water pump will increase the power consumption, and part of the power consumption is used for useless work, resulting in high power consumption and a waste of power resources. Summary of the invention

[0004] In view of the problems raised by the above background technology, the purpose of the present invention is to provide a device and method for measuring water pump parameters of an air conditioning water system.

[0005] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows:

[0006] A device for measuring water pump parameters of an air conditioning water system comprises an air conditioning main unit, the output end of the air conditioning main unit is connected to a plurality of air conditioning indoor units, the output ends of the plurality of air conditioning indoor units are connected to a pipeline assembly, the other side of the pipeline assembly is mounted on the air conditioning main unit, and a first pressure gauge, a water pump, a second pressure gauge, a regulating valve, a third pressure gauge and a flow meter are mounted on the pipeline assembly.

[0007] It is further defined that the pipeline assembly includes a converging pipeline, a water pump pipeline and a return pipeline, the input end of the converging pipeline is connected to the output ends of the plurality of air conditioner indoor units, the output end of the converging pipeline is connected to the input end of the water pump pipeline, the output end of the water pump pipeline is connected to the input end of the return pipeline, and the output end of the return pipeline is connected to the air conditioner host. Such a structural design is convenient for connection, installation and use.

[0008] It is further defined that the two sides of the water pump pipeline are connected to the converging pipeline and the return pipeline through flange locking and sealing. Such a structural design facilitates the water pump pipeline to be locked and connected with the converging pipeline and the return pipeline through the flange for installation and removal.

[0009] It is further defined that the first pressure gauge is installed on the confluence pipeline, the water pump is installed on the water pump pipeline, and the second pressure gauge, the regulating valve, the third pressure gauge and the flow meter are installed on the return pipeline in sequence from left to right. Such a structural design is convenient for installation, detection and use.

[0010] It is further defined that the first pressure gauge, the second pressure gauge and the third pressure gauge have the same size and structure and are all high-precision pressure gauges. Such a structural design is convenient for purchase and maintenance.

[0011] It is further defined that the regulating valve is a manual regulating valve. Such a structural design allows the regulating valve to be adjusted manually.

[0012] It is further defined that the flow meter is a high-precision digital flow meter. Such a structural design allows the flow meter to display the detected values, so that the values ​​can be viewed more intuitively.

[0013] It is further defined that a first temperature sensor is installed at the input end of the air conditioner main unit, and a second temperature sensor is installed at the output end of the air conditioner main unit. Such a structural design detects the inlet and outlet water temperatures through the first temperature sensor and the second temperature sensor, and displays the detected values ​​on the air conditioner main unit for easy viewing by operators.

[0014] A measuring method for a measuring device of a water pump parameter of an air conditioning water system, characterized in that it comprises the following steps:

[0015] S1: In extreme weather conditions such as the coldest or hottest, all air conditioner indoor units are turned on to make the air conditioner main unit reach the maximum workload and the water flow in the pipe assembly reaches the maximum value;

[0016] S2: Check the inlet water temperature and outlet water temperature on the air conditioner host through the first temperature sensor and the second temperature sensor. If the temperature difference reaches 5°C, there is no need to adjust the regulating valve. If the temperature difference does not reach 5°C, adjust the size of the regulating valve so that the difference between the inlet water temperature and the outlet water temperature reaches 5°C.

[0017] S3: Use the flow meter to measure and read the flow value in the pipeline component. If the value is stable and has no fluctuations, record the flow value. That is, the actual flow value required by the water pump is: Q;

[0018] S4: Read and calculate the actual head value required by the water pump, read the values ​​on the first pressure gauge, the second pressure gauge and the third pressure gauge, and subtract the value of the second pressure gauge from the value of the first pressure gauge to get the actual pressure-increasing capacity of the water pump. After the regulating valve is adjusted, there will be resistance, and the resistance value is obtained by subtracting the value of the third pressure gauge from the value of the second pressure gauge;

[0019] Finally, the calculation formula of the water pump head is: P2-P1-(P2-P3)=H;

[0020] S5: After completing the parameter measurement of flow rate and head, select the corresponding water pump for replacement according to the parameters, and open the regulating valve to the maximum so that the resistance value of the second pressure gauge minus the third pressure gauge can be ignored, so that the air conditioner host can effectively reduce power consumption under normal operation.

[0021] The beneficial effects of the present invention are as follows: the present invention measures the water pump parameters (flow rate, head) through the first pressure gauge, the second pressure gauge, the regulating valve, the third pressure gauge and the flow meter, selects a suitable water pump according to the parameters after the measurement, and replaces it for use so that it meets the actual demand value of the unit, and by detecting the flow value and the pressure before and after the water pump, it can obtain accurate water pump parameters that can ensure the operation effect of the system: flow rate, head, reduce or have no surplus value, thereby reducing the power consumption of the water pump and achieving the effect of energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention can be further illustrated by the non-limiting examples given in the accompanying drawings;

[0023] Figure 1 This is a schematic diagram of the structure of a device for measuring water pump parameters of an air conditioning water system according to an embodiment of the present invention;

[0024] The main component symbols are described as follows:

[0025] Air conditioner host 1, air conditioner indoor unit 2, pipeline assembly 3, first pressure gauge 4, water pump 5, second pressure gauge 6, regulating valve 7, third pressure gauge 8, flow meter 9, confluence pipeline 10, water pump pipeline 11, return pipeline 12, first temperature sensor 13, second temperature sensor 14. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0027] like Figure 1 As shown, a device for measuring water pump parameters of an air conditioning water system of the present invention, the output end of the air conditioning host 1 is connected to a plurality of air conditioning indoor units 2, the output ends of the plurality of air conditioning indoor units 2 are connected to a pipeline assembly 3, the other side of the pipeline assembly 3 is installed on the air conditioning host 1, and the pipeline assembly 3 is installed with a first pressure gauge 4, a water pump 5, a second pressure gauge 6, a regulating valve 7, a third pressure gauge 8 and a flow meter 9.

[0028] Preferably, the pipeline assembly 3 includes a converging pipeline 10, a water pump pipeline 11 and a return pipeline 12, the input end of the converging pipeline 10 is connected to the output ends of several air-conditioning indoor units 2, the output end of the converging pipeline 10 is connected to the input end of the water pump pipeline 11, the output end of the water pump pipeline 11 is connected to the input end of the return pipeline 12, and the output end of the return pipeline 12 is connected to the air-conditioning host 1. Such a structural design is convenient for connection, installation and use. In fact, other structural shapes of the pipeline assembly 3 can also be considered according to specific circumstances.

[0029] Preferably, both sides of the water pump pipeline 11 are connected to the confluence pipeline 10 and the return pipeline 12 by flange locking and sealing. Such a structural design facilitates the installation and removal of the water pump pipeline 11 by locking connection with the confluence pipeline 10 and the return pipeline 12 through the flange. In fact, other installation structural shapes of the water pump pipeline 11, the confluence pipeline 10 and the return pipeline 12 can also be considered according to specific circumstances.

[0030] Preferably, the first pressure gauge 4 is installed on the confluence pipeline 10, the water pump 5 is installed on the water pump pipeline 11, and the second pressure gauge 6, the regulating valve 7, the third pressure gauge 8 and the flow meter 9 are installed on the return pipeline 12 from left to right. Such a structural design is convenient for installation, detection and use. In fact, other layout and installation structural shapes of the first pressure gauge 4, the water pump 5, the second pressure gauge 6, the regulating valve 7, the third pressure gauge 8 and the flow meter 9 can also be considered according to specific circumstances.

[0031] Preferably, the first pressure gauge 4, the second pressure gauge 6 and the third pressure gauge 8 have the same size and structure, and are all high-precision pressure gauges. Such a structural design is convenient for purchase and maintenance. In fact, other structural shapes of pressure gauges can also be considered according to specific circumstances.

[0032] Preferably, the regulating valve 7 is a manual regulating valve. Such a structural design is used by manually adjusting the regulating valve 7. In fact, other structural shapes of the regulating valve can also be considered according to specific circumstances.

[0033] Preferably, the flow meter 9 is a high-precision digital flow meter. Such a structural design allows the flow meter 9 to display the detected values, so that the values ​​can be viewed more intuitively. In fact, other structural shapes of the flow meter can also be considered according to specific circumstances.

[0034] Preferably, a first temperature sensor 13 is installed at the input end of the air conditioner main unit 1, and a second temperature sensor 14 is installed at the output end of the air conditioner main unit 1. Such a structural design detects the inlet and outlet water temperatures through the first temperature sensor 13 and the second temperature sensor 14, and displays the detected values ​​on the air conditioner main unit 1 for easy viewing by operators. In fact, other water temperature detection structural shapes of the air conditioner main unit can also be considered according to specific circumstances.

[0035] In this embodiment, in extreme weather such as the coldest or hottest, all air-conditioning indoor units 2 are turned on, so that the air-conditioning host 1 reaches the maximum workload, and the water flow in the pipe assembly 3 reaches the maximum value. The inlet water temperature and the outlet water temperature checked on the air-conditioning host 1 by the first temperature sensor 13 and the second temperature sensor 14, if the temperature difference reaches 5C°, there is no need to adjust the regulating valve 7. If the temperature difference does not reach 5C°, the size of the regulating valve 7 is adjusted to make the difference between the inlet water temperature and the outlet water temperature reach 5C°, and the flow value in the pipe assembly 3 is measured and read by the flow meter 9. The flow value is stable and has no fluctuations. The flow value, that is, the actual flow value required by the water pump 5 is: Q, the actual head value required by the water pump 5 is read and calculated, and the values ​​on the first pressure gauge 4, the second pressure gauge 6 and the third pressure gauge 8 are read, and the value of the second pressure gauge 6 is subtracted from the value of the first pressure gauge 4 The value obtained by the numerical value is the actual boosting capacity of the water pump 5, and there will be resistance after the regulating valve 7 is adjusted. The value of the second pressure gauge 6 minus the value of the third pressure gauge 8 is the resistance value. Finally, through the calculation formula of the water pump head: H=P2-P1-(P2-P3), after completing the parameter measurement of the flow rate and head, select the corresponding water pump 5 according to the parameters, and remove the water pump pipeline 11 from the pipeline assembly 3, remove the original water pump 5 on the water pump pipeline 11, and then install the water pump 5 with the corresponding parameters on the water pump pipeline 11, and finally reinstall the water pump pipeline 11 between the confluence pipeline 10 and the return pipeline 12. After replacing the water pump 5, open the regulating valve 7 to the maximum, so that the resistance value of the second pressure gauge 6 minus the third pressure gauge 8 can be ignored, so that the air-conditioning host 1 can effectively reduce the power consumption under normal operation and can meet the normal operation of the system.

[0036] Real case: A system analysis and transformation has been completed. The main heating capacity of the HVAC system is 1025kW. The original design used a water pump (flow rate: 187m 3 / h; head 36 meters, power: 30kW, the technology was used on site to measure and calculate the pump parameters (flow rate: 160m 3 / h; lift 9 meters, power: 7.5kW). After replacing the water pump, the air conditioning system has been operating normally for two months. After replacing the water pump, the water pump consumes less than 1 / 3 of the original water pump's power consumption per hour, reducing 22kW of power consumption per hour. The air conditioning system runs 10 hours a day, saving 220 degrees of electricity every day.

[0037] A measuring method for a measuring device of a water pump parameter of an air conditioning water system, characterized in that it comprises the following steps:

[0038] S1: In extreme weather conditions such as the coldest or hottest, all air-conditioning indoor units 2 are turned on, so that the air-conditioning host 1 reaches the maximum workload, and the water flow in the pipe assembly 3 reaches the maximum value;

[0039] S2: Check the inlet water temperature and outlet water temperature on the air conditioner main unit 1 through the first temperature sensor 13 and the second temperature sensor 14. If the temperature difference reaches 5°C, there is no need to adjust the regulating valve 7. If the temperature difference does not reach 5°C, adjust the size of the regulating valve 7 so that the difference between the inlet water temperature and the outlet water temperature reaches 5°C.

[0040] S3: Measure and read the flow value in the pipeline assembly 3 through the flow meter 9. If the value is stable and has no fluctuations, record the flow value. That is, the actual flow value required by the water pump 5 is: Q;

[0041] S4: Read and calculate the actual head value required by the water pump 5, read the values ​​on the first pressure gauge 4, the second pressure gauge 6 and the third pressure gauge 8, and subtract the value of the second pressure gauge 6 from the value of the first pressure gauge 4 to obtain the actual pressure-increasing capacity of the water pump 5. After the regulating valve 7 is adjusted, there will be resistance, and the resistance value is obtained by subtracting the value of the third pressure gauge 8 from the value of the second pressure gauge 6;

[0042] Finally, the calculation formula of the water pump head is: H = P2-P1-(P2-P3);

[0043] S5: After completing the parameter measurement of flow rate and head, select the corresponding water pump 5 for replacement according to the parameters, and at the same time open the regulating valve 7 to the maximum, so that the resistance value of the second pressure gauge 6 minus the third pressure gauge 8 can be ignored, so that the air conditioner host 1 can effectively reduce power consumption under normal operation.

[0044] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A device for measuring water pump parameters of an air conditioning water system, characterized in that: The invention comprises an air conditioner main unit (1), wherein the output end of the air conditioner main unit (1) is connected to a plurality of air conditioner indoor units (2), the output ends of the plurality of air conditioner indoor units (2) are connected to a pipeline assembly (3), the other side of the pipeline assembly (3) is mounted on the air conditioner main unit (1), and the pipeline assembly (3) is mounted with a first pressure gauge (4), a water pump (5), a second pressure gauge (6), a regulating valve (7), a third pressure gauge (8) and a flow meter (9).

2. A device for measuring water pump parameters of an air conditioning water system according to claim 1, characterized in that: The pipeline assembly (3) comprises a converging pipeline (10), a water pump pipeline (11) and a return pipeline (12); the input end of the converging pipeline (10) is connected to the output ends of a plurality of the air-conditioning indoor units (2); the output end of the converging pipeline (10) is connected to the input end of the water pump pipeline (11); the output end of the water pump pipeline (11) is connected to the input end of the return pipeline (12); and the output end of the return pipeline (12) is connected to the air-conditioning host (1).

3. The device for measuring water pump parameters of an air conditioning water system according to claim 2, characterized in that: Both sides of the water pump pipeline (11) are connected to the confluence pipeline (10) and the return pipeline (12) in a sealing manner via flange locking.

4. A device for measuring water pump parameters of an air conditioning water system according to claim 3, characterized in that: The first pressure gauge (4) is installed on the confluence pipeline (10), the water pump (5) is installed on the water pump pipeline (11), and the second pressure gauge (6), the regulating valve (7), the third pressure gauge (8) and the flow meter (9) are installed in sequence from left to right on the return pipeline (12).

5. A device for measuring water pump parameters of an air conditioning water system according to claim 4, characterized in that: The first pressure gauge (4), the second pressure gauge (6) and the third pressure gauge (8) have the same size and structure and are all high-precision pressure gauges.

6. A device for measuring water pump parameters of an air conditioning water system according to claim 5, characterized in that: The regulating valve (7) is a manual regulating valve.

7. A device for measuring water pump parameters of an air conditioning water system according to claim 6, characterized in that: The flow meter (9) is a high-precision digital flow meter.

8. The device for measuring water pump parameters of an air conditioning water system according to claim 7, characterized in that: A first temperature sensor (13) is installed at the input end of the air-conditioning main unit (1), and a second temperature sensor (14) is installed at the output end of the air-conditioning main unit (1).

9. A method for measuring the parameters of a water pump in an air conditioning water system according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1: In extreme weather conditions such as the coldest or hottest, all air conditioner indoor units (2) are turned on, so that the air conditioner host (1) reaches the maximum workload and the water flow in the pipe assembly (3) reaches the maximum value; S2: Checking the inlet water temperature and the outlet water temperature on the air conditioner main unit (1) through the first temperature sensor (13) and the second temperature sensor (14); if the temperature difference reaches 5°C, the regulating valve (7) does not need to be adjusted; if the temperature difference does not reach 5°C, the size of the regulating valve (7) is adjusted so that the difference between the inlet water temperature and the outlet water temperature reaches 5°C; S3: Measure and read the flow value in the pipeline component (3) through the flow meter (9). If the value is stable and has no fluctuations, record the flow value. That is, the flow value actually required by the water pump (5) is: Q; S4: reading and calculating the head value actually required by the water pump (5), reading the values ​​on the first pressure gauge (4), the second pressure gauge (6) and the third pressure gauge (8), and subtracting the value of the second pressure gauge (6) from the value of the first pressure gauge (4) to obtain the value of the actual pressure-increasing capacity of the water pump (5), and there will be resistance after the regulating valve (7) is adjusted, and the value obtained by subtracting the value of the third pressure gauge (8) from the value of the second pressure gauge (6) is the resistance value; Finally, the calculation formula of the water pump head is: P2-P1-(P2-P3)=H; S5: After completing the parameter measurement of flow rate and head, the corresponding water pump (5) is selected for replacement according to the parameters, and the regulating valve (7) is opened to the maximum, so that the resistance value of the second pressure gauge (6) minus the third pressure gauge (8) can be ignored, so that the air conditioner host (1) can effectively reduce power consumption under normal operation.

Images