CN105388925A - Draught fan unloading method and system based on system pressure signal - Google Patents
Draught fan unloading method and system based on system pressure signal Download PDFInfo
- Publication number
- CN105388925A CN105388925A CN201510654265.8A CN201510654265A CN105388925A CN 105388925 A CN105388925 A CN 105388925A CN 201510654265 A CN201510654265 A CN 201510654265A CN 105388925 A CN105388925 A CN 105388925A
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- blower fan
- system pressure
- pressure value
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- detecting
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000007599 discharging Methods 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 5
- 239000002699 waste material Substances 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/20—Control of fluid pressure characterised by the use of electric means
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a draught fan unloading method and system based on a system pressure signal. The method includes the following steps of: detecting a system pressure value in real time through a pressure sensor; performing a corresponding draught fan unloading plan through a relay and performing draught fan unloading control according to the detected system pressure value. The system includes a pressure detecting unit and an unloading control unit. According to the draught fan unloading method and system based on the system pressure signal, draught fun unloading control can be selectively performed based on an actual pressure threshold by detecting the system pressure value in real time, in such a way that the condition of system evaporator frosting can be avoided when the system pressure value is high, the service life of an evaporator can be effectively prolonged, and the energy waste during system operation can be avoided; and meanwhile, the condition of system evaporator frosting can be avoided when the system pressure value is low, and high effective and safe operation of the system can be effectively ensured. The draught fan unloading method and system based on the system pressure signal can be widely applied to the field of heat pump control.
Description
Technical field
The present invention relates to heat pump control technology field, particularly relate to a kind of blower fan discharging method based on system pressure signal and system.
Background technology
Heat pump was when pressure reached high-voltage value in the past, unloaded a blower fan, when pressure drops to low voltage value, recovered fan operation, to ensure system high efficiency safe operation, but often there will be following problem:
After unloading blower fan when pressure does not also drop to low voltage value, evaporator end just starts frosting, thus have impact on the Effec-tive Function of unit and shorten the serviceable life of evaporator.
Summary of the invention
In order to solve the problems of the technologies described above, the object of this invention is to provide and a kind of ensure unit Effec-tive Function, and a kind of blower fan discharging method based on system pressure signal and the system in system serviceable life can be extended.
The technical solution adopted in the present invention is:
Based on a blower fan discharging method for system pressure signal, comprise the following steps:
A, by pressure transducer real-time detecting system force value;
B, the system pressure value obtained according to detection, perform corresponding blower fan offload scheme by relay and carry out blower fan Unloading Control.
As the further improvement of described a kind of blower fan discharging method based on system pressure signal, described step B comprises:
B1, judge whether be more than or equal to default HVT high voltage threshold, if so, then unloaded by Control blower fan and resumed operation and hocket, now, blower fan discharge time is longer than blower fan and is resumed operation the time if detecting the system pressure value that obtains; Otherwise, then keep current state constant;
B2, judge whether be less than or equal to default low pressure threshold, if so, then unloaded by Control blower fan and resumed operation and hocket, now, the blower fan time of resuming operation is longer than blower fan discharge time if detecting the system pressure value that obtains; Otherwise, then keep current state constant.
As the further improvement of described a kind of blower fan discharging method based on system pressure signal, described relay is solid-state relay.
Another technical scheme of the present invention is:
Based on a blower fan uninstalling system for system pressure signal, comprising:
Pressure sensing cell, for passing through pressure transducer real-time detecting system force value;
Unloading Control unit, for according to detecting the system pressure value obtained, performing corresponding blower fan offload scheme by relay and carrying out blower fan Unloading Control.
As the further improvement of described a kind of blower fan uninstalling system based on system pressure signal, described Unloading Control unit comprises:
First air-blower control unit, for judging whether detect the system pressure value obtained is more than or equal to default HVT high voltage threshold, if so, then unloaded by Control blower fan and resumed operation and hocket, now, blower fan discharge time is longer than blower fan and is resumed operation the time; Otherwise, then keep current state constant;
Second air-blower control unit, for judging whether detect the system pressure value obtained is less than or equal to default low pressure threshold, if so, then unloaded by Control blower fan and resumed operation and hocket, now, the blower fan time of resuming operation is longer than blower fan discharge time; Otherwise, then keep current state constant.
The invention has the beneficial effects as follows:
A kind of blower fan discharging method based on system pressure signal of the present invention and system are by real-time detecting system force value, blower fan Unloading Control is carried out according to actual pressure threshold values selectivity, the situation occurring system evaporator frosting can be avoided like this when system pressure value is higher, effective prolongation evaporator serviceable life, the waste of the system cloud gray model energy can be avoided again, and can effectively ensure system high efficiency safe operation when system pressure value is lower while avoiding occurring system evaporator frosting situation.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:
Fig. 1 is the flow chart of steps of a kind of blower fan discharging method based on system pressure signal of the present invention;
Fig. 2 is the system block diagram of a kind of blower fan uninstalling system based on system pressure signal of the present invention;
Fig. 3 is the blower fan sequential control figure of the embodiment of the present invention 1;
Fig. 4 is the blower fan sequential control figure of the embodiment of the present invention 2.
Embodiment
With reference to figure 1, a kind of blower fan discharging method based on system pressure signal of the present invention, comprises the following steps:
A, by pressure transducer real-time detecting system force value;
B, the system pressure value obtained according to detection, perform corresponding blower fan offload scheme by relay and carry out blower fan Unloading Control.
Be further used as preferred embodiment, described step B comprises:
B1, judge whether be more than or equal to default HVT high voltage threshold, if so, then unloaded by Control blower fan and resumed operation and hocket, now, blower fan discharge time is longer than blower fan and is resumed operation the time if detecting the system pressure value that obtains; Otherwise, then keep current state constant;
B2, judge whether be less than or equal to default low pressure threshold, if so, then unloaded by Control blower fan and resumed operation and hocket, now, the blower fan time of resuming operation is longer than blower fan discharge time if detecting the system pressure value that obtains; Otherwise, then keep current state constant.
In the embodiment of the present invention, directly utilize pressure transducer detection system force value, compare the combination of tradition by controller and pressure switch, accuracy of the present invention is higher, and pressure transducer can directly show that system pressure value compares judgement, data processing speed is very fast, can effectively increase work efficiency.
Be further used as preferred embodiment, described relay is solid-state relay.Adopt solid-state relay in HI high impact, to work under the environment of vibration, effective prolongation system serviceable life, reliability is higher.And the input voltage range of solid-state relay is wider, driving power is low, can not need to add impact damper or driver with most of logical integrated circuit compatibility, highly sensitive, and control power little, Electro Magnetic Compatibility is good.Described solid-state relay is because adopt solid state device, so switch speed from several milliseconds to a few microsecond, can shorten system response time.
With reference to figure 2, a kind of blower fan uninstalling system based on system pressure signal of the present invention, comprising:
Pressure sensing cell, for passing through pressure transducer real-time detecting system force value;
Unloading Control unit, for according to detecting the system pressure value obtained, performing corresponding blower fan offload scheme by relay and carrying out blower fan Unloading Control.
Be further used as preferred embodiment, described Unloading Control unit comprises:
First air-blower control unit, for judging whether detect the system pressure value obtained is more than or equal to default HVT high voltage threshold, if so, then unloaded by Control blower fan and resumed operation and hocket, now, blower fan discharge time is longer than blower fan and is resumed operation the time; Otherwise, then keep current state constant;
Second air-blower control unit, for judging whether detect the system pressure value obtained is less than or equal to default low pressure threshold, if so, then unloaded by Control blower fan and resumed operation and hocket, now, the blower fan time of resuming operation is longer than blower fan discharge time; Otherwise, then keep current state constant.
In the embodiment of the present invention, the HVT high voltage threshold preset is 3.6MPa, and default low pressure threshold is 2.8MPa, and specific embodiment is as follows:
S1, by pressure transducer real-time detecting system force value;
S2, the system pressure value obtained according to detection, perform corresponding blower fan offload scheme by relay and carry out blower fan Unloading Control;
Judge whether be raised to 3.6MPa, if so, then unloaded by Control blower fan and resumed operation and hocket, now, blower fan discharge time is set to 3 minutes, and the blower fan time of resuming operation is set to 1 minute, as Fig. 3 if detecting the system pressure value obtained; Otherwise, then keep current state constant;
Judge whether drop to 2.8MPa, if so, then unloaded by Control blower fan and resumed operation and hocket, now, blower fan discharge time is set to 1 minute, and the blower fan time of resuming operation is set to 3 minutes, as Fig. 4 if detecting the system pressure value obtained; Otherwise, then keep current state constant.
From foregoing:
A kind of blower fan discharging method based on system pressure signal of the present invention and system are by real-time detecting system force value, blower fan Unloading Control is carried out according to actual pressure threshold values selectivity, the situation occurring system evaporator frosting can be avoided like this when system pressure value is higher, effective prolongation evaporator serviceable life, the waste of the system cloud gray model energy can be avoided again, and can effectively ensure system high efficiency safe operation when system pressure value is lower while avoiding occurring system evaporator frosting situation.
More than that better enforcement of the present invention is illustrated, but the invention is not limited to described embodiment, those of ordinary skill in the art also can make all equivalent variations or replacement under the prerequisite without prejudice to spirit of the present invention, and these equivalent distortion or replacement are all included in the application's claim limited range.
Claims (5)
1., based on a blower fan discharging method for system pressure signal, it is characterized in that, comprise the following steps:
A, by pressure transducer real-time detecting system force value;
B, the system pressure value obtained according to detection, perform corresponding blower fan offload scheme by relay and carry out blower fan Unloading Control.
2. a kind of blower fan discharging method based on system pressure signal according to claim 1, is characterized in that: described step B comprises:
B1, judge whether be more than or equal to default HVT high voltage threshold, if so, then unloaded by Control blower fan and resumed operation and hocket, now, blower fan discharge time is longer than blower fan and is resumed operation the time if detecting the system pressure value that obtains; Otherwise, then keep current state constant;
B2, judge whether be less than or equal to default low pressure threshold, if so, then unloaded by Control blower fan and resumed operation and hocket, now, the blower fan time of resuming operation is longer than blower fan discharge time if detecting the system pressure value that obtains; Otherwise, then keep current state constant.
3. a kind of blower fan discharging method based on system pressure signal according to claim 1, is characterized in that: described relay is solid-state relay.
4., based on a blower fan uninstalling system for system pressure signal, it is characterized in that, comprising:
Pressure sensing cell, for passing through pressure transducer real-time detecting system force value;
Unloading Control unit, for according to detecting the system pressure value obtained, performing corresponding blower fan offload scheme by relay and carrying out blower fan Unloading Control.
5. a kind of blower fan uninstalling system based on system pressure signal according to claim 4, is characterized in that: described Unloading Control unit comprises:
First air-blower control unit, for judging whether detect the system pressure value obtained is more than or equal to default HVT high voltage threshold, if so, then unloaded by Control blower fan and resumed operation and hocket, now, blower fan discharge time is longer than blower fan and is resumed operation the time; Otherwise, then keep current state constant;
Second air-blower control unit, for judging whether detect the system pressure value obtained is less than or equal to default low pressure threshold, if so, then unloaded by Control blower fan and resumed operation and hocket, now, the blower fan time of resuming operation is longer than blower fan discharge time; Otherwise, then keep current state constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510654265.8A CN105388925A (en) | 2015-10-10 | 2015-10-10 | Draught fan unloading method and system based on system pressure signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510654265.8A CN105388925A (en) | 2015-10-10 | 2015-10-10 | Draught fan unloading method and system based on system pressure signal |
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| Publication Number | Publication Date |
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| CN105388925A true CN105388925A (en) | 2016-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510654265.8A Pending CN105388925A (en) | 2015-10-10 | 2015-10-10 | Draught fan unloading method and system based on system pressure signal |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050153648A1 (en) * | 2004-01-14 | 2005-07-14 | Horner Darrell W. | Cabin pressure control method and apparatus using all-electric control without outflow valve position feedback |
| CN1702408A (en) * | 2004-05-28 | 2005-11-30 | Lg电子株式会社 | Apparatus and method for controlling multiple compressors contained in air conditioner |
| CN1959112A (en) * | 2005-10-31 | 2007-05-09 | 乐金电子(天津)电器有限公司 | Method for controlling oil return in dual compressors with equal capacities |
| CN101140474A (en) * | 2006-09-06 | 2008-03-12 | 北京北方微电子基地设备工艺研究中心有限责任公司 | Pressure control system |
| CN101178192A (en) * | 2006-11-08 | 2008-05-14 | 乐金电子(天津)电器有限公司 | Multistage compression air-conditioner |
| CN103660393A (en) * | 2012-09-25 | 2014-03-26 | 昆山鸣朋纸业有限公司 | Constant pressure control system of high pressure induced-draft fan |
| CN104456968A (en) * | 2014-11-06 | 2015-03-25 | 广东芬尼克兹节能设备有限公司 | Intelligent draught fan unloading, adjusting and controlling method |
| CN204591742U (en) * | 2015-03-18 | 2015-08-26 | 广东芬尼克兹节能设备有限公司 | A kind of blower fan uninstalling system |
-
2015
- 2015-10-10 CN CN201510654265.8A patent/CN105388925A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050153648A1 (en) * | 2004-01-14 | 2005-07-14 | Horner Darrell W. | Cabin pressure control method and apparatus using all-electric control without outflow valve position feedback |
| CN1702408A (en) * | 2004-05-28 | 2005-11-30 | Lg电子株式会社 | Apparatus and method for controlling multiple compressors contained in air conditioner |
| CN1959112A (en) * | 2005-10-31 | 2007-05-09 | 乐金电子(天津)电器有限公司 | Method for controlling oil return in dual compressors with equal capacities |
| CN101140474A (en) * | 2006-09-06 | 2008-03-12 | 北京北方微电子基地设备工艺研究中心有限责任公司 | Pressure control system |
| CN101178192A (en) * | 2006-11-08 | 2008-05-14 | 乐金电子(天津)电器有限公司 | Multistage compression air-conditioner |
| CN103660393A (en) * | 2012-09-25 | 2014-03-26 | 昆山鸣朋纸业有限公司 | Constant pressure control system of high pressure induced-draft fan |
| CN104456968A (en) * | 2014-11-06 | 2015-03-25 | 广东芬尼克兹节能设备有限公司 | Intelligent draught fan unloading, adjusting and controlling method |
| CN204591742U (en) * | 2015-03-18 | 2015-08-26 | 广东芬尼克兹节能设备有限公司 | A kind of blower fan uninstalling system |
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Application publication date: 20160309 |
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