CN208476555U - A kind of measuring system of small air quantity unit - Google Patents
A kind of measuring system of small air quantity unit Download PDFInfo
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- CN208476555U CN208476555U CN201820801778.6U CN201820801778U CN208476555U CN 208476555 U CN208476555 U CN 208476555U CN 201820801778 U CN201820801778 U CN 201820801778U CN 208476555 U CN208476555 U CN 208476555U
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- air
- sampling
- measuring system
- air quantity
- measuring
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Abstract
The utility model discloses a kind of measuring system of small air quantity unit, is related to small air measuring technical field, including cabinet, includes by air compartment and sampling room in the cabinet, the sampling room is set to the rear side by air compartment, and is arranged side by side with described by air compartment；The side by air compartment offer for connect measured unit by test-run a machine interface, be provided with sampler in the sampling room, the sampler is connect with described by air compartment；The cabinet is also connected with measuring device.The utility model fundamentally solves the disadvantage that Pitot tube measures air mass flow, institute's measurement equipment need to be only connected with connection air hose with test device, it can realize automatic detection, simultaneously, measuring accuracy is high, test process is not required to adjust point position, can directly display and acquire air mass flow and air status parameter by computer.
Description
Technical field
The utility model relates to small air measuring technical fields, and in particular to a kind of measuring system of small air quantity unit.
Background technique
Small-sized wine cellar air conditioner, pet air conditioner, the cooling air-conditioning of switchette cabinet as air conditioner in machine room branch
Device, small-sized household dehumidifier, Household Air Purifier etc. in the performance test, generally will to the air mass flow of its outlet air and
Air condition measures.Small air measuring is always a great problem of air handling industry；Common measurement air mass flow at present
Method be Pitot flowmeter for pipe method, working principle is mainly static pressure and the dynamic pressure of the air in measurement pipe to calculate air
Flow velocity goes out the flow of air further according to PIPE DIAMETER CALCULATION.
Due to needing multiple measuring points of entire pipe cross section to measure when Pitot tube measures dynamic pressure, when actual measurement, pacifies
It is very cumbersome to fill pressure-measuring-point, adjusts that point position is very difficult, and inconvenience automatic adjustment can not be to the state of air when test
Parameter measures.Therefore, in the measurement of the air mass flow of airhandling equipment, had using Pitot flowmeter for pipe method measurement
Certain limitation, maximum disadvantage is exactly the accurate test for being not easy to be automated.
Therefore it provides a kind of measuring system of small air quantity unit, really to measure 105m3/ h and following small air quantity unit be not
With air mass flow under outlet air static pressure and outlet air state parameter, become present technical problem urgently to be resolved.
Utility model content
The purpose of the utility model is to provide a kind of measuring systems of small air quantity unit, exist to solve the above-mentioned prior art
The problem of, using nozzle process to 105m3/ h and the air quantity of small air quantity equipment below are accurately tested, and are realized to air shape
The measurement of state parameter.
To achieve the above object, the utility model provides following scheme: the utility model provides a kind of small air quantity unit
Measuring system, including cabinet includes by air compartment and sampling room in the cabinet, and the sampling room is set to described by air compartment
Rear side, and be arranged side by side with described by air compartment；The side by air compartment offer for connect measured unit by test-run a machine
Interface is provided with sampler in the sampling room, and the sampler is connect with described by air compartment；The cabinet is also connected with
Measuring device.
Preferably, the junction by air compartment and the sampling room is provided with cowling panel, and the cowling panel is located at described
The front of sampling room.
Preferably, the sampler includes sampling blower and sampling flute pipe, the sampling blower by bellows and
The sampling flute pipe connection, the sampling flute pipe are arranged close to the cowling panel.
Preferably, measurement case, setting in the measurement case are additionally provided between the sampling blower and the bellows
There is the air duct for being connected to the sampling blower and bellows, is additionally provided with measurement water box in the measurement case and for surveying
Measure the platinum resistance of dry-bulb temperature and wet-bulb temperature.
Preferably, the measurement water box are also connected with moisturizing cup.
Preferably, the measuring device includes outlet air static pressure measurement control device and air-flow control device.
Preferably, the outlet air static pressure measurement control device includes frequency converting induced draft fan, pressure difference transmitter and feedback control tune
Device is saved, the pressure difference transmitter is connect with the hydrostatic measuring point being arranged in the cabinet.
Preferably, the air-flow control device includes nozzle, preceding pressure samples point and rear pressure samples point, before described
Pressure samples point and rear pressure samples point are separately positioned on front side and the rear side of the nozzle, the preceding pressure samples point and rear pressure
Power sample point is connect with the pressure difference transmitter.
It preferably, further include mounting rack, the cabinet and frequency converting induced draft fan are mounted on the mounting rack, the peace
The bottom end shelved is provided with castor.
The utility model achieves following technical effect compared with the existing technology:
1, using the method for nozzle to 105m3The air quantity of/h and small air quantity device below is accurately tested；
2, specially designed sampler carries out the measurement of air status parameter to the outlet air of airhandling equipment.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model
Some embodiments for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other attached drawings.
Fig. 1 is the structural schematic diagram of the measuring system of the small air quantity unit of the utility model；
Fig. 2 is the top view of Fig. 1；
Fig. 3 is the side view of Fig. 1；
Wherein, 1 is hydrostatic measuring point, and 2 is, by test-run a machine interface, 3 are cowling panel, and 4 be sampler, and 5 be hose, and 6 be frequency conversion
Air-introduced machine, pressure samples point before 7,8 be rear pressure samples point, and 9 be nozzle.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
The purpose of the utility model is to provide a kind of measuring systems of small air quantity unit, exist to solve the above-mentioned prior art
The problem of, using nozzle process to 105m3/ h and the air quantity of small air quantity equipment below are accurately tested, and are realized to air shape
The measurement of state parameter.
To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, with reference to the accompanying drawing and have
Body embodiment is described in further detail the utility model.
As shown in Figure 1-3, the utility model provides a kind of measuring system of small air quantity unit, including cabinet, packet in cabinet
It includes by air compartment and sampling room, sampling room is set to the rear side by air compartment, and is arranged side by side with by air compartment；It is opened up by the side of air compartment
Have for connect measured unit by test-run a machine interface 2, be provided with sampler 4 in sampling room, sampler 4 connects with by air compartment
It connects；Cabinet is also connected with measuring device.
The junction of air compartment and sampling room is provided with cowling panel 3, cowling panel 3 is located at the front of sampling room；Tested unit
Outlet air is sent to through connecting air hose by air compartment, because of temperature and humidity on air-out direction section and non-homogeneous, therefore to tested unit outlet air shape
Before state sampling, the air is rectified by cowling panel 3, mixed processing, guarantees that sampling each point temperature and humidity is almost the same.
Sampler 4 includes sampling blower and sampling flute pipe, and sampling blower is connect by bellows 5 with sampling flute pipe,
Flute pipe is sampled to be arranged close to cowling panel 3.Sample the typical case that blower introduces the rectification processing of rectified plate 3 in air port by sampling flute pipe
Sample air, in order to easy to operate, sampling blower and sampling flute pipe are mutually indepedent, are attached between the two with bellows 5.It takes
The effective stainless steel tube of sample flute is made, upper and lower two parts have the circular hole of 2-6 diameter 25mm, to be sampled to absorb
Air.
It is additionally provided with measurement case between sampling blower and bellows 5, measures in case and is provided with air duct, for being connected to sampling
Blower and bellows 5.Measurement water box and the platinum electricity for measuring dry-bulb temperature and wet-bulb temperature are additionally provided in measurement case
Resistance, the temperature of the air of sampler 4 is flowed through by the size measurement of resistance value；Measurement water box are also connected with moisturizing cup, measure
Water in water box is fed automatically from moisturizing cup, it is ensured that constant level and the convenience of raising operation in measurement water box, while
Reduce the measurement error due to caused by the distance change of wet-bulb temperature measuring point and water box water level.In order to observe conveniently, temperature and humidity
Measurement case is formed using organic glass gluing, and measurement case is 100mm × 100mm by standard circulation sectional dimension, and length is
250mm.In measurement process, ensure to flow through the air velocity at wet-bulb temperature platinum resistance not less than 5m/s by sampling blower.
Measuring device includes outlet air static pressure measurement control device and air-flow control device in the utility model.
Outlet air static pressure measurement control device includes frequency converting induced draft fan 6, pressure difference transmitter and feedback control regulator, and frequency conversion is drawn
Blower 6 is connect by hose 5 with cabinet, and pressure difference transmitter is attached with the hydrostatic measuring point 1 being arranged in cabinet by connecting tube,
Hydrostatic measuring point 1 is close to be arranged by test-run a machine interface 2.The static pressure of hydrostatic measuring point 1 is measured by pressure difference transmitter, and is sent to feedback control
The static pressure of actual measurement is compared difference with setting value and is used to adjust 6 turns of frequency converting induced draft fan by adjuster processed, feedback control regulator
Speed, to make measured value gradually close to setting value until being equal to setting value.The control such as computer can be used in feedback control regulator
Equipment.
Air-flow control device is connected by sampling room outlet in hose and cabinet, including nozzle 9, preceding pressure samples point
7 and rear pressure samples point 8, preceding pressure samples point 7 and rear pressure samples point 8 are separately positioned on front side and the rear side of nozzle 9, preceding pressure
Power sample point 7 and rear pressure samples point 8 are connect by connecting tube with pressure difference transmitter；Pass through the pressure difference of 9 front and back of measurement nozzle
Gas flow rate is calculated, the volume flow of air is obtained further according to the diameter of nozzle 9.
It further include mounting rack, cabinet and frequency converting induced draft fan 6 are mounted on mounting rack, are integrated in one, and it is compact-sized,
It is easily installed；The bottom end of mounting rack is provided with castor, facilitates the movement of entire measuring system.
The measuring process of the measuring system of the small air quantity unit of the utility model is as follows:
1) air conditioner, a semicanal of indoor and outdoor machine connecting tube are installed according to the requirement of product instruction for mounting and testing standard
Length is placed in outdoor；
2) it after model machine installation, is vacuumized according to the requirement of instruction for mounting, processing mode: will be in connecting tube, heat exchanger
Air emptying, vacuum pressure are maintained under 0.3kPa after 30min, and pressure rise should be no more than 0.05kPa；
3) after being vacuum-treated, refrigerant is perfused according to the requirement of instruction for mounting；
4) air conditioner having is not required to vacuumize, and can carry out emptying process according to instruction for mounting；
5) model machine, which is powered, runs, and adjusts laboratory environment operating condition according to testing standard, operating condition is made to reach standard regulation deviation
After it is required that, tested by the measuring system of small air quantity unit；
6) power supply according to testing standard requirement；
7) the connection duct length of sample air outlet must not exceed 0.5m, and air hose shape should not generate sample air-out volume
It influences；
8) model machine indoor unit should be horizontally arranged, and condensed water exclusion is answered smooth.
The measuring system of the small air quantity unit of the utility model is using the method for nozzle to 105m3/ h and small air quantity below
The air quantity of device is accurately tested, and specially designed sampler carries out air shape to the outlet air of airhandling equipment
The measurement of state parameter fundamentally solves the disadvantage that Pitot tube measures air mass flow；And institute's measurement equipment need to only be connected
Air hose is connected with test device, so that it may realize automatic detection, meanwhile, measuring accuracy is high, and test process is not required to adjust measuring point
Position can be directly displayed and be acquired air mass flow and air status parameter by computer.
Specific case is applied in the utility model to be expounded the principles of the present invention and embodiment, it is above
The explanation of embodiment is merely used to help understand the method and its core concept of the utility model；Meanwhile for the one of this field
As technical staff, based on the idea of the present invention, there will be changes in the specific implementation manner and application range.To sum up
Described, the content of the present specification should not be construed as a limitation of the present invention.
Claims (9)
1. a kind of measuring system of small air quantity unit, it is characterised in that: include by air compartment and sampling in the cabinet including cabinet
Room, the sampling room is set to the rear side by air compartment, and is arranged side by side with described by air compartment；It opens the side by air compartment
Equipped with for connect measured unit by test-run a machine interface, be provided with sampler in the sampling room, the sampler with
It is described to be connected by air compartment；The cabinet is also connected with measuring device.
2. the measuring system of small air quantity unit according to claim 1, it is characterised in that: described by air compartment and the sampling
The junction of room is provided with cowling panel, and the cowling panel is located at the front of the sampling room.
3. the measuring system of small air quantity unit according to claim 2, it is characterised in that: the sampler includes sampling
Blower and sampling flute pipe, the sampling blower are connect by bellows with the sampling flute pipe, and the sampling flute pipe is close to institute
State cowling panel setting.
4. the measuring system of small air quantity unit according to claim 3, it is characterised in that: the sampling blower is stretched with described
It is additionally provided with measurement case between contracting hose, the wind for being connected to the sampling blower and bellows is provided in the measurement case
Road is additionally provided with measurement water box and the platinum resistance for measuring dry-bulb temperature and wet-bulb temperature in the measurement case.
5. the measuring system of small air quantity unit according to claim 4, it is characterised in that: the measurement water box are also connected with
Moisturizing cup.
6. the measuring system of small air quantity unit according to claim 1, it is characterised in that: the measuring device includes outlet air
Static pressure measurement control device and air-flow control device.
7. the measuring system of small air quantity unit according to claim 6, it is characterised in that: the outlet air static pressure measurement control
Device includes frequency converting induced draft fan, pressure difference transmitter and feedback control regulator, setting in the pressure difference transmitter and the cabinet
Hydrostatic measuring point connection.
8. the measuring system of small air quantity unit according to claim 7, it is characterised in that: the air-flow control device
Including nozzle, preceding pressure samples point and rear pressure samples point, the preceding pressure samples point and rear pressure samples point are separately positioned on
The front side of the nozzle and rear side, the preceding pressure samples point and rear pressure samples point are connect with the pressure difference transmitter.
9. the measuring system of small air quantity unit according to claim 1, it is characterised in that: it further include mounting rack, the case
Body and frequency converting induced draft fan are mounted on the mounting rack, and the bottom end of the mounting rack is provided with castor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820801778.6U CN208476555U (en) | 2018-05-28 | 2018-05-28 | A kind of measuring system of small air quantity unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820801778.6U CN208476555U (en) | 2018-05-28 | 2018-05-28 | A kind of measuring system of small air quantity unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208476555U true CN208476555U (en) | 2019-02-05 |
Family
ID=65218923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820801778.6U Expired - Fee Related CN208476555U (en) | 2018-05-28 | 2018-05-28 | A kind of measuring system of small air quantity unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208476555U (en) |
-
2018
- 2018-05-28 CN CN201820801778.6U patent/CN208476555U/en not_active Expired - Fee Related
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190205 Termination date: 20190528 |
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| CF01 | Termination of patent right due to non-payment of annual fee |