CN207422563U - A kind of constant pressure frequency conversion moisturizing unit - Google Patents
A kind of constant pressure frequency conversion moisturizing unit Download PDFInfo
- Publication number
- CN207422563U CN207422563U CN201721298016.0U CN201721298016U CN207422563U CN 207422563 U CN207422563 U CN 207422563U CN 201721298016 U CN201721298016 U CN 201721298016U CN 207422563 U CN207422563 U CN 207422563U
- Authority
- CN
- China
- Prior art keywords
- frequency
- small pump
- control cabinet
- moisturizing
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Control Of Positive-Displacement Pumps (AREA)
Abstract
A kind of constant pressure frequency conversion moisturizing unit, including frequency-conversion control cabinet, small pump, pressure sensor, check-valves, ball valve, mounting seat and several for connection water pipe, frequency-conversion control cabinet, small pump are arranged in mounting seat, frequency-conversion control cabinet is connected with small pump, for controlling moisturizing pump power output, pressure sensor is arranged on moisturizing water pump outlet pipe, for detecting outlet port hydraulic pressure and signal output part is connected with frequency-conversion control cabinet, and check-valves and ball valve are arranged on outlet pipe.The utility model overcomes the deficiencies in the prior art, by the combination of frequency converter, pressure sensor and small pump, and by rational circuit design, can control its rate of water make-up to heating ventilation air-conditioning system by adjusting the running speed of small pump.It is that the mesh of heating ventilation air-conditioning system pressure changes to reach steady.This utility model patent frequency converter to be protected, pressure sensor, the combination of small pump and the control circuit designed for it and integrated structure type.
Description
Technical field
The utility model is related to Heating,Ventilating and Air Conditioning technical fields, particularly belong to a kind of constant pressure frequency conversion moisturizing unit.
Background technology
The steady of system press water replanishing device that Heating,Ventilating and Air Conditioning industry uses at present, mostly using electro connecting pressure gauge, pressure switch or
Pressure sensor combination electric-control system carrys out control system moisturizing pump work.According to system working pressure demand, upper pressure limit is set
And low pressure limit, when thus pressure drops to setting low pressure limit for system dehydration, moisturizing pump startup is controlled, is noted into system
Water, when system pressure reaches the upper limit, control small pump stops.The mode of this control small pump start and stop, if the pressure of setting
When the difference of power upper and lower bound is smaller, small pump start and stop can be caused excessively to be tired of frequently, easily make small pump motor overheating and damage.
Therefore, the system pressure upper and lower bound difference of constant pressure water compensation apparatus setting at present is all larger, minimum not less than 0.1MPa, inevitable
System pressure fluctuation can be caused larger.Harmful effect is caused to the trouble free service of miscellaneous equipment in system.
Utility model content
The purpose of the utility model is to provide a kind of constant pressure frequency conversion moisturizing units, overcome the deficiencies in the prior art, lead to
It crosses the PID regulating systems being made of pressure sensor, frequency converter and other electric control elements and controls moisturizing pump operation to Heating,Ventilating and Air Conditioning
System water supplement, compared with traditional heating ventilation air-conditioning system constant pressure supply water mode, new constant pressure frequency conversion moisturizing unit can make system
Range of pressure fluctuations smaller is smaller than 0.01MPa, and traditional approach minimum can only control system pressure fluctuation range
0.05MPa.Small pump will not be tired of start and stop frequently simultaneously, because moisturizing pump motor, can be big because of starting current impact overheat without caused by
The big service life for extending moisturizing pump motor, moisturizing pump motor service life can at most be made to extend one times or more.In the Inner Mongol suddenly
In woods Guo Le central heating project applications, compared with pervious moisturizing control mode, system pressure fluctuation range is by original
1.2MPa~1.3MPa is reduced to 1.25MPa ± 0.01MPa.
To solve the above problems, technical solution adopted in the utility model is as follows：
A kind of constant pressure frequency conversion moisturizing unit, including frequency-conversion control cabinet, small pump, pressure sensor, check-valves, ball valve, peace
It fills pedestal and several is used for the water pipe connected, the frequency-conversion control cabinet, small pump are arranged in mounting seat, described
Frequency-conversion control cabinet is connected with small pump, for controlling moisturizing pump power output, and the pressure sensor is arranged on moisturizing and pumps out
On water pipe, for detecting outlet port hydraulic pressure and signal output part is connected with frequency-conversion control cabinet, the check-valves and ball valve are equal
It is arranged on outlet pipe.
Further, pressure gauge is further included, the pressure gauge is connected by pipeline with outlet pipe.
Further, safety valve is further included, the safety valve is arranged on outlet pipe.
Further, the small pump is two, and described two small pump water inlet pipes are connected together by pipeline, are stated
Two moisturizing water pump outlet pipes are connected together by pipeline.
Further, equipped with frequency converter VVF, frequency-conversion control cabinet access three-phase five-wire mode in the frequency-conversion control cabinet
Power supply is powered to frequency converter VVF, and frequency converter VVF output termination small pumps, the pressure sensor passes through terminals
Sub- XT2 is connected with frequency converter VVF.
Compared with prior art, the implementation result of the utility model is as follows：
A kind of constant pressure frequency conversion moisturizing unit described in the utility model, passes through having for frequency converter, pressure sensor and small pump
Machine combines, and by rational circuit design, can control it to heating ventilation air-conditioning system by adjusting the running speed of small pump
Rate of water make-up.It is that the mesh of heating ventilation air-conditioning system pressure changes to reach steady.This utility model patent frequency converter to be protected, pressure sensing
Device, the combination of small pump and the control circuit designed for it and integrated structure type.
Description of the drawings
Fig. 1 is the utility model structure diagram.
The elementary diagram of frequency converter in Fig. 2 frequency-conversion control cabinets.
Fig. 3 is heating ventilation air-conditioning system using traditional constant pressure supply water control mode system pressure fluctuation range figure.
Fig. 4 is heating ventilation air-conditioning system using system pressure wave pattern after frequency-changing pressure stabilizing moisturizing unit.
Specific embodiment
With reference to embodiment, the invention will be further described, but the present invention is not limited to these instances, to be de-
On the premise of from present inventive concept, carried out by it is any improvement be within the scope of the present invention.
As shown in the figure, a kind of constant pressure frequency conversion moisturizing unit described in the utility model, including frequency-conversion control cabinet 1, small pump
2nd, pressure sensor 4, check-valves 6, ball valve 7, mounting seat 8 and several for connection water pipe, the frequency-conversion control cabinet,
Small pump is arranged in mounting seat, and the frequency-conversion control cabinet is connected with small pump, for controlling moisturizing pump power output,
The pressure sensor is arranged on moisturizing water pump outlet pipe, for detecting outlet port hydraulic pressure and signal output part and frequency conversion
Switch board connects, and the check-valves and ball valve are arranged on outlet pipe.
Further, pressure gauge 3 is further included, the pressure gauge is connected by pipeline with outlet pipe.
Further, safety valve 5 is further included, the safety valve is arranged on outlet pipe；The small pump is two, institute
The two small pump water inlet pipes stated are connected together by pipeline, and two stated moisturizing water pump outlet pipe is connected together by pipeline；Institute
It accesses three-phase five-wire mode power supply equipped with frequency converter VVF, the frequency-conversion control cabinet in the frequency-conversion control cabinet stated and is supplied to frequency converter VVF
Electricity, frequency converter VVF output termination small pumps, the pressure sensor pass through wire connection terminal XT2 and frequency converter VVF phases
Connection.
When SB1 is pressed, intermediate relay 1KA coils obtain electric, and normally opened contact 1KA1 is closed to form self-locking, normally opened to touch
Point 1KA2 is closed, and frequency converter VVF starts to start operation, automatically by the pressure signal monitored by pressure sensor 4 and frequency conversion
Default pressure value is compared in device, if the pressure signal monitored is less than setting value, frequency converter VVF control small pumps 1
Rotating speed is improved, increases rate of water make-up, if the pressure signal monitored is higher than setting value, frequency converter VVF control small pumps 1, which reduce, to be turned
Speed reduces rate of water make-up, and when the pressure signal monitored and equal or close setting pressure, Frequency Converter Control small pump stabilization exists
On a certain rotating speed, small pump rate of water make-up and system fluid loss reach balance, and system pressure stabilization is near setting value.Stop when pressing
Only during button SB2, intermediate relay 1KA coil losing electricities, normally opened contact 1KA1,1KA2 are disconnected, and unit is stopped.
Claims (5)
1. a kind of constant pressure frequency conversion moisturizing unit, it is characterised in that：Including frequency-conversion control cabinet, small pump, pressure sensor, non-return
Valve, ball valve, mounting seat and several for connection water pipe, the frequency-conversion control cabinet, small pump be arranged at installation bottom
On seat, the frequency-conversion control cabinet is connected with small pump, for controlling moisturizing pump power output, and the pressure sensor is set
On moisturizing water pump outlet pipe, for detecting outlet port hydraulic pressure and signal output part is connected with frequency-conversion control cabinet, the non-return
Valve and ball valve are arranged on outlet pipe.
2. a kind of constant pressure frequency conversion moisturizing unit according to claim 1, it is characterised in that：Pressure gauge is further included, it is described
Pressure gauge is connected by pipeline with outlet pipe.
3. a kind of constant pressure frequency conversion moisturizing unit according to claim 1, it is characterised in that：Safety valve is further included, it is described
Safety valve is arranged on outlet pipe.
4. a kind of constant pressure frequency conversion moisturizing unit according to claim 1, it is characterised in that：The small pump is two,
Two small pump water inlet pipes are connected together by pipeline, and two stated moisturizing water pump outlet pipe is connected together by pipeline.
5. a kind of constant pressure frequency conversion moisturizing unit according to claim 1, it is characterised in that：Match somebody with somebody in the frequency-conversion control cabinet
There is frequency converter VVF, the frequency-conversion control cabinet accesses three-phase five-wire mode power supply and powers to frequency converter VVF, the frequency converter VVF
Output termination small pump, the pressure sensor are connected by wire connection terminal XT2 with frequency converter VVF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721298016.0U CN207422563U (en) | 2017-10-10 | 2017-10-10 | A kind of constant pressure frequency conversion moisturizing unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721298016.0U CN207422563U (en) | 2017-10-10 | 2017-10-10 | A kind of constant pressure frequency conversion moisturizing unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207422563U true CN207422563U (en) | 2018-05-29 |
Family
ID=62310878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721298016.0U Expired - Fee Related CN207422563U (en) | 2017-10-10 | 2017-10-10 | A kind of constant pressure frequency conversion moisturizing unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207422563U (en) |
-
2017
- 2017-10-10 CN CN201721298016.0U patent/CN207422563U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180529 Termination date: 20201010 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |