Field calibration device for water pressure sensor of central air-conditioning system

Abstract

A central air-conditioning system is one of systems with the highest energy consumption in a building. As field calibration cannot be carried out, the measurement of a water pressure sensor in the central air-conditioning system is inaccurate, and the energy efficiency improvement of the central air-conditioning system is influenced. The utility model provides an on-site calibration device for a water pressure sensor of a central air-conditioning system, which is characterized by comprising a pressure bag, a water tank, a pressurizing device, a one-way valve, a standard water pressure sensor, a pressure release valve, a safety valve, a serial port server and a computer, and can be used for quickly and accurately carrying out on-site calibration on the water pressure sensor of the central air-conditioning system. The measurement accuracy of the water pressure sensor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of building energy conservation, in particular to an on-site calibration device for a water pressure sensor of a central air-conditioning system. Background Art

[0002] The central air conditioning system is one of the systems with the highest energy consumption in buildings. Optimizing and adjusting the operating status of the central air conditioning system based on the data measured by the water pressure sensor is a necessary measure to ensure the efficient operation of the central air conditioning. In actual operation, due to procurement and installation issues, the water pressure sensor measurement data is not accurate, and the sensor's measurement value will drift over time, which greatly affects the improvement of the energy efficiency of the central air conditioning system. In order to improve the measurement accuracy of the water pressure sensor, the water pressure sensor needs to be calibrated on site.

[0003] In the prior art, water pressure sensor calibration devices are generally used for laboratory calibration and are not convenient for field calibration. This is because: (1) the measurement data of the water pressure sensor on site is not displayed locally, but on the monitoring platform, while the standard pressure data in the water pressure calibration device in the prior art can only be displayed locally, and the comparison between the two is very inconvenient; (2) the water pressure sensor calibration device in the prior art generally adjusts the pressure by manually adding or removing weights, which is inefficient. However, there are a large number of water pressure sensors on site, and multi-point calibration is required in a short time. The prior art cannot meet this requirement. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In order to solve the problems existing in the above background technology, the utility model provides an on-site calibration device for a water pressure sensor of a central air conditioning system. Compared with the prior art, the utility model can be conveniently used for on-site calibration of a water pressure sensor of a central air conditioning system.

[0006] (II) Technical solution

[0007] The utility model provides an on-site calibration device for a water pressure sensor of a central air conditioning system, comprising:

[0008] Standard water pressure sensor with 485 interface and high measurement accuracy;

[0009] A serial port server, wherein the first end of the serial port server has a 485 interface connected to the standard water pressure sensor, and the second end of the serial port server has an Internet port or a USB interface;

[0010] A computer, wherein a first end of the computer has an Internet port or a USB interface connected to the serial port server, and a second end of the computer has an Internet port connected to a communication network;

[0011] The pressure bag is a horizontally placed straight metal round tube, the first end of which is completely closed, the second end of which is open, and the side wall of which is connected to a plurality of thin round tubes, one of which is connected to the standard water pressure sensor, and the others are connected to the water pressure sensors to be calibrated, and the highest point of the pressure bag is provided with an exhaust port;

[0012] A water tank, which is an open container containing water;

[0013] A pressurizing device, the inlet end of which is connected to the water tank directly or through a pipeline;

[0014] a one-way valve, the inlet end of which is connected to the outlet end of the pressurizing device directly or through a pipeline;

[0015] A safety valve, the inlet end of which is connected to the outlet end of the one-way valve directly or through a pipeline, and the outlet end of which is connected to the water tank directly or through a pipeline;

[0016] A pressure relief valve, the inlet end of which is connected to the outlet end of the one-way valve directly or through a pipeline, and the outlet end of which is connected to the water tank directly or through a pipeline;

[0017] Furthermore, the pressurizing device is an electric gear pump.

[0018] Furthermore, the pressure relief valve is an electrically driven valve.

[0019] The method of using the utility model is as follows:

[0020] The on-site water pressure sensor is mounted on the thin round tube of the pressure bag. All wiring of the on-site water pressure sensor remains unchanged, so the measured value of the on-site water pressure sensor can still be displayed and read on the original monitoring platform.

[0021] Since starting the pressurizing device can increase the pressure of the water in the pressure bag, and opening the pressure relief valve can reduce the pressure of the water in the pressure bag, the pressurizing device and the pressure relief valve cooperate to adjust and stabilize the pressure of the water in the pressure bag at a required value. This process can be achieved automatically or manually.

[0022] The standard water pressure sensor measures the pressure of the water in the pressure bag, and transmits the measured value to the computer through the serial port server, and the computer stores and displays the measured value. There are three ways to compare the measured value of the standard water pressure sensor with the measured value of the on-site water pressure sensor: (1) The computer transmits the measured value of the standard water pressure sensor to the original monitoring platform through the communication network, and the comparison is performed on the original monitoring platform; (2) The original monitoring platform transmits the measured value of the on-site water pressure sensor to the computer through the communication network, and the comparison is performed on the computer; (3) The computer transmits the measured value of the standard water pressure sensor to the mobile phone through the communication network, and the operator holds it and compares it with the value on the original monitoring platform.

[0023] When the pressure in the outlet pipeline of the pressurizing device or in the pressure bag exceeds the safety pressure, the safety valve automatically opens to release the pressure.

[0024] (III) Beneficial effects

[0025] The method of using the utility model is as follows:

[0026] The on-site water pressure sensor is mounted on the thin round tube of the pressure bag. All wiring of the on-site water pressure sensor remains unchanged, so the measured value of the on-site water pressure sensor can still be displayed and read on the original monitoring platform.

[0027] Since starting the pressurizing device can increase the pressure of the water in the pressure bag, and opening the pressure relief valve can reduce the pressure of the water in the pressure bag, the pressurizing device and the pressure relief valve cooperate to adjust and stabilize the pressure of the water in the pressure bag at a required value. This process can be achieved automatically or manually.

[0028] The standard water pressure sensor measures the pressure of the water in the pressure bag, and transmits the measured value to the computer through the serial port server, and the computer stores and displays the measured value. There are three ways to compare the measured value of the standard water pressure sensor with the measured value of the on-site water pressure sensor: (1) The computer transmits the measured value of the standard water pressure sensor to the original monitoring platform through the communication network, and the comparison is performed on the original monitoring platform; (2) The original monitoring platform transmits the measured value of the on-site water pressure sensor to the computer through the communication network, and the comparison is performed on the computer; (3) The computer transmits the measured value of the standard water pressure sensor to the mobile phone through the communication network, and the operator holds the mobile phone and compares it with the measured value of the on-site water pressure on the original monitoring platform.

[0029] When the pressure in the outlet pipeline of the pressurizing device or in the pressure bag exceeds the safety pressure, the safety valve automatically opens to release the pressure.

[0030] From the above-mentioned usage method of the utility model, it can be seen that the utility model has the following beneficial effects:

[0031] (1) There are three ways to compare the measured values ​​of the standard water pressure sensor and the on-site water pressure sensor, which can be compared very conveniently;

[0032] (2) The pressure in the pressure bag is adjusted by the pressurizing device and the pressure relief valve, which is convenient and quick, and is suitable for multi-point rapid calibration of a large number of water pressure sensors on site. In particular, an electric gear pump and an electric drive valve can be used for adjustment, thereby achieving fully automatic adjustment;

[0033] (3) When the pressure inside the device exceeds the safety pressure, the safety valve automatically releases pressure to ensure the safety of the device;

[0034] (4) The measured value of the standard water pressure sensor can be stored in real time in the computer for easy review. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 An on-site calibration device for a water pressure sensor of a central air-conditioning system is provided in Example 1 of the utility model. DETAILED DESCRIPTION

[0037] In order to better understand the present invention, the content of the present invention is further clearly described below in conjunction with the embodiments, but the protection content of the present invention is not limited to the following embodiments. In the following description, a large number of specific details are given in order to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details. The present invention is further described below in conjunction with the accompanying drawings.

[0038] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the utility model described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0039] Example 1

[0040] like Figure 1 As shown, this embodiment provides an on-site calibration device for a water pressure sensor of a central air conditioning system, comprising:

[0041] Standard water pressure sensor 1, which has a 485 interface and has high measurement accuracy;

[0042] A serial port server 2, wherein a first end of the serial port server 2 has a 485 interface connected to the standard water pressure sensor 1, and a second end of the serial port server 2 has a network port or a USB interface;

[0043] Computer 3, a first end of the computer 3 has a network port or a USB interface connected to the serial port server 2, and a second end of the computer 3 has a network port connected to the communication network;

[0044] The pressure bag 4 is a horizontally placed straight metal round tube, the first end of which is completely closed and the second end of which is open. A plurality of thin round tubes 41 are connected to the side wall of the pressure bag 4. One of the thin round tubes 41 is connected to the standard water pressure sensor 1, and the others are connected to the water pressure sensors to be calibrated. The highest point of the pressure bag 4 has an exhaust port 42.

[0045] A water tank 5, which is an open container containing water;

[0046] A pressurizing device 6, the inlet end of which is connected to the water tank 5 directly or through a pipeline;

[0047] A one-way valve 7, the inlet end of which is connected to the outlet end of the pressurizing device 6 directly or through a pipeline;

[0048] A safety valve 8, whose inlet end is connected to the outlet end of the check valve 7 directly or through a pipeline, and whose outlet end is connected to the water tank 5 directly or through a pipeline;

[0049] A pressure relief valve 9, whose inlet end is connected to the outlet end of the one-way valve 7 directly or through a pipeline, and whose outlet end is connected to the water tank 5 directly or through a pipeline;

[0050] Optionally, the pressurizing device 6 is an electric gear pump.

[0051] Optionally, the pressure relief valve 8 is an electrically driven valve.

[0052] The method of using this embodiment is as follows:

[0053] The water pressure sensor at the scene is installed on the thin round tube 41 of the pressure bag 4. All the wiring of the water pressure sensor at the scene remains unchanged, so the measured value of the water pressure sensor at the scene can still be displayed and read on the original monitoring platform.

[0054] Since starting the pressurizing device 6 can increase the pressure of the water in the pressure bag 4, and opening the pressure relief valve 9 can reduce the pressure of the water in the pressure bag 4, the pressurizing device 6 and the pressure relief valve 9 cooperate to adjust and stabilize the pressure of the water in the pressure bag 4 at a required value. If the pressurizing device 6 adopts an electric gear pump and the pressure relief valve 9 adopts an electrically driven valve, this process can be achieved through automatic control.

[0055] The standard water pressure sensor 1 measures the water pressure in the pressure bag 4, and transmits the measured value to the computer 3 through the serial port server 2, and the computer 3 stores and displays the measured value. There are three ways to compare the measured value of the standard water pressure sensor 1 with the measured value of the on-site water pressure sensor: (1) the computer 3 transmits the measured value of the standard water pressure sensor 1 to the original monitoring platform through the communication network, and the comparison is performed on the original monitoring platform; (2) the original monitoring platform transmits the measured value of the on-site water pressure sensor to the computer 3 through the communication network, and the comparison is performed on the computer 3; (3) the computer 3 transmits the measured value of the standard water pressure sensor 1 to the mobile phone through the communication network, and the operator holds the mobile phone and compares it with the measured value of the on-site water pressure on the original monitoring platform.

[0056] When the pressure in the outlet pipeline of the pressurizing device 6 or the pressure in the pressure bag 4 exceeds the safety pressure, the safety valve 8 automatically opens to release the pressure.

[0057] This embodiment has the following beneficial effects:

[0058] (1) There are three ways to compare the measured values ​​of the standard water pressure sensor 1 and the on-site water pressure sensor, which can be compared very conveniently;

[0059] (2) The pressure in the pressure bag 4 is adjusted by the pressurizing device 6 and the pressure relief valve 9, which is convenient and quick, and is suitable for multi-point rapid calibration of a large number of water pressure sensors on site. In particular, an electric gear pump and an electric drive valve can be used for adjustment, thereby achieving fully automatic adjustment;

[0060] (3) When the pressure inside the device exceeds the safety pressure, the safety valve 8 automatically releases the pressure to ensure the safety of the device;

[0061] (4) The measured value of the standard water pressure sensor 1 can be stored in real time in the computer 3 for easy review.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A central air conditioning system water pressure sensor on-site calibration device, characterized in that: include: Standard water pressure sensor with 485 interface and high measurement accuracy; A serial port server, wherein the first end of the serial port server has a 485 interface connected to the standard water pressure sensor, and the second end of the serial port server has an Internet port or a USB interface; A computer, wherein a first end of the computer has an Internet port or a USB interface connected to the serial port server, and a second end of the computer has an Internet port connected to a communication network; The pressure bag is a horizontally placed straight metal round tube, the first end of which is completely closed, the second end of which is open, and the side wall of which is connected to a plurality of thin round tubes, one of which is connected to the standard water pressure sensor, and the others are connected to the water pressure sensors to be calibrated, and the highest point of the pressure bag is provided with an exhaust port; A water tank, which is an open container containing water; A pressurizing device, the inlet end of which is connected to the water tank directly or through a pipeline; a one-way valve, the inlet end of which is connected to the outlet end of the pressurizing device directly or through a pipeline; A safety valve, the inlet end of which is connected to the outlet end of the one-way valve directly or through a pipeline, and the outlet end of which is connected to the water tank directly or through a pipeline; The pressure relief valve has an inlet end connected to the outlet end of the one-way valve directly or through a pipeline, and an outlet end connected to the water tank directly or through a pipeline.

2. A central air conditioning system water pressure sensor on-site calibration device as claimed in claim 1, characterized in that: The pressurizing device is an electric gear pump.

3. A central air conditioning system water pressure sensor on-site calibration device as claimed in claim 1, characterized in that: The pressure relief valve is an electrically driven valve.

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