CN101738038A - Control method for pressure balance of heat pump air conditioner - Google Patents
Control method for pressure balance of heat pump air conditioner Download PDFInfo
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- CN101738038A CN101738038A CN200910311776A CN200910311776A CN101738038A CN 101738038 A CN101738038 A CN 101738038A CN 200910311776 A CN200910311776 A CN 200910311776A CN 200910311776 A CN200910311776 A CN 200910311776A CN 101738038 A CN101738038 A CN 101738038A
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Abstract
The invention discloses a control method for the pressure balance of a heat pump air conditioner, which can enhance the control reliability of the pressure balance of an air-conditioning system. In the control method for the pressure balance of the heat pump air conditioner, a coil is switched on or switched off by a controller when a compressor works in a refrigeration process; when the compressor works in a heating process, the controller enables the switching-on/switching-off state of the coil to be opposite to that of the coil when the compressor carries out the refrigeration operation; when the compressor stops in the refrigeration process, the controller enables the switching-on/switching-off state of the coil to be same as the switching-on/switching-off state of the coil when the compressor works in the heating process; and when the compressor stops in the heating process, the controller enables the switching-on/switching-off state of the coil to be same as the switching-on/switching-off state of the coil when the compressor works in the refrigeration process. The flow directions of high-pressure and low-pressure cooling media in the system are switched by controlling an electromagnetic cross joint reversing valve used by the heat pump air conditioner per se, the pressure of the high-pressure and low-pressure cooling media of the air-conditioning system is effectively balanced in the stop/start process of the compressor, and the invention is especially suitable for popularization and application on the heat pump air conditioner.
Description
Technical field
The present invention relates to heat pump type air conditioning system, be specifically related to a kind of control method for pressure balance of heat pump air conditioner.
Background technology
At present, the pressure balance of air-conditioning system mainly is meant: compressor of air conditioner is in the reciprocation cycle process of frequent start-stop, the pressure self-balancing process of air-conditioning system high-pressure side and low-pressure side, its effect is to keep the staring torque of compressor in reliable scope, particularly under adverse circumstances and low-voltage starting state, the staring torque of compressor itself requires just very big, so air-conditioning system high-low pressure equilibrium of forces speed and effect just have great important to the startability and the long-term stable operation of compressor.The pressure balance method of air-conditioning system mainly contains two kinds at present:
First kind is present most popular control device, promptly by the software control means, allow in the air-conditioning system compressor in the stop and start control procedure, add a delayed startup control, allow compressor in stopped process, carry out the process of a self-balancing by the time chien shih system high-low pressure of time-delay, reduce because the compressor start moment that height pressure reduction causes increases.
Second kind is to realize by increasing extra control element, as between the suction line of compressor low-pressure side and the on high-tension side gas exhaust piping of compressor, increasing a bridge-type device, and by its break-make of solenoid control, when compressor is operation, close the bridge-type device, and when compressor stops, opening the bridge-type device.Thereby realize the quick balance of compressor high and low side pressure in reciprocal stop and start process.
The shortcoming of first kind of control mode existence is:
Though not increasing extra cost and be easy to, software control do not realize, but its main defective is present air-conditioning system high and low pressure side mainly is to realize by depressurization capillaceous, when compressor in the delayed startup process, its self-balancing mode also can only realize by tiny capillary, its pressure balance speed and effect are all very poor obviously, and the overlong time of time-delay also can impact the comfortableness that air-conditioning uses, and therefore this settling mode is unsatisfactory.
The shortcoming of second kind of control mode existence is:
By between the air-conditioning system high and low pressure side, increasing the bridge-type device that to control its break-make, be can quick and effective balance sysmte pressure, but it is apparent that the bridge-type device that it increases is to be independent of the outer extra components and parts of former air-conditioning system, it not only makes air-conditioning system still all increase extra risk on reliability from the space, and the cost of its increase also is conspicuous.
And the operation principle of air-conditioning system is at present:
1, when heat pump air conditioner freezes, coil 4 does not power on by controller 5 (generally adopting MCU) control, is in " OFF " (outage) state, guide valve 3 is failure to actuate, according to the situation that is provided with at first that guide valve 3 is failure to actuate, at this moment, there are two kinds of situations slide block 6 residing positions; And when heating, coil 4 powers on by controller 5 controls, is in " ON " (energising) state, guide valve 3 actions, and corresponding during with refrigeration, also there are two kinds of situations slide block 6 residing positions when heating.
A, during refrigeration, slide block 6 can be the left side (as shown in Figure 1) that is positioned at main valve body 2, this moment, the first refrigerant mouth 7 was the high pressure refrigerant inlet of compressor air-discharging side to heat exchanger, the second refrigerant mouth 8 is the low pressure refrigerant outlet of heat exchanger to suction side, the 3rd refrigerant mouth 9 is the high pressure refrigerant exit of compressor to heat exchanger, the 4th refrigerant mouth 10 is the low pressure refrigerant inlet of heat exchanger to suction side, the high pressure refrigerant pressure of the first refrigerant mouth 7 is passed to the right side of slide block 6 by capillary 11, the refrigerant pressure of the second refrigerant mouth 8 is passed to the left side of slide block 6 by capillary 11, so air conditioner refrigerating control is realized in slide block 6 can slide to main valve body 2 under left and right sides pressure reduction left side.When heating, because coil 4 powers on, at this moment, the situation of guide valve 3 as shown in Figure 3, the first refrigerant mouth 7 is the high pressure refrigerant inlet of compressor air-discharging side to heat exchanger, the second refrigerant mouth 8 is the low pressure refrigerant outlet of heat exchanger to suction side, the 3rd refrigerant mouth 9 is the low pressure refrigerant inlet of heat exchanger to suction side, the 4th refrigerant mouth 10 is the high pressure refrigerant exit of compressor to heat exchanger, at this moment, the high pressure refrigerant pressure of the first refrigerant mouth 7 is passed to the left side of slide block 6 by capillary 11, the refrigerant pressure of the second refrigerant mouth 8 is passed to the right side of slide block 6 by capillary 11, so slide block 6 can slide to main valve body 2 under left and right sides pressure reduction right side realizes that air-conditioning heats control.
When b, refrigeration, slide block 6 also can be the right side (as shown in Figure 3) that is positioned at main valve body 2, this moment, the first refrigerant mouth 7 was the high pressure refrigerant inlet of compressor air-discharging side to heat exchanger, the second refrigerant mouth 8 is the low pressure refrigerant outlet of heat exchanger to suction side, the 3rd refrigerant mouth 9 is the low pressure refrigerant inlet of heat exchanger to suction side, and the 4th refrigerant mouth 10 is the high pressure refrigerant exit of compressor to heat exchanger.At this moment, the high pressure refrigerant pressure of the first refrigerant mouth 7 is passed to the left side of slide block 6 by capillary 11, the refrigerant pressure of the second refrigerant mouth 8 is passed to the right side of slide block 6 by capillary 11, so the refrigeration control of air-conditioning is realized on slide block 6 right side that can slide to main valve body 2 under left and right sides pressure reduction.When heating, because coil 4 powers on, at this moment, the situation of guide valve 3 as shown in Figure 1, the first refrigerant mouth 7 is the high pressure refrigerant inlet of compressor air-discharging side to heat exchanger, the second refrigerant mouth 8 is the low pressure refrigerant outlet of heat exchanger to suction side, the 3rd refrigerant mouth 9 is the high pressure refrigerant exit of compressor to heat exchanger, the 4th refrigerant mouth 10 is the low pressure refrigerant inlet of heat exchanger to suction side, the high pressure refrigerant pressure of the first refrigerant mouth 7 is passed to the right side of slide block 6 by capillary 11, the refrigerant pressure of the second refrigerant mouth 8 is passed to the left side of slide block 6 by capillary 11, so slide block 6 can slide to main valve body 2 under left and right sides pressure reduction left side realizes that air-conditioning heats control.
2, when heat pump air conditioner freezes, coil 4 powers on by controller 5 controls, is in " ON " (energising) state, guide valve 3 actions, and according to the situation that is provided with at first that guide valve 3 is failure to actuate, at this moment, there are two kinds of situations slide block 6 residing positions; And when heating, coil 4 does not power on by controller 5 controls, is in " OFF " (outage) state, and guide valve 3 is failure to actuate, and corresponding during with refrigeration, also there are two kinds of situations slide block 6 residing positions when heating.
In a word, when heat pump air conditioner freezes, coil 4 can be switched on also can no power, and when heating, opposite getting final product when the power on/off state of coil 4 only needs with refrigeration, it is situation according to slide block 6, the 3rd refrigerant mouth 9 is respectively the low pressure refrigerant inlet of compressor to the high pressure refrigerant exit of heat exchanger or heat exchanger to suction side, same, the 4th refrigerant mouth 10 is also according to the situation of slide block 6, can be respectively the low pressure refrigerant inlet of compressor to the high pressure refrigerant exit of heat exchanger or heat exchanger to suction side.In when refrigeration, compressor links to each other with outdoor heat exchanger to the high pressure refrigerant exit of heat exchanger, and heat exchanger to the low pressure refrigerant of suction side enters the mouth and links to each other with indoor heat exchanger; And when heating, compressor to the high pressure refrigerant exit of heat exchanger links to each other with indoor heat exchanger, and heat exchanger to the low pressure refrigerant of suction side inlet links to each other with outdoor heat exchanger.
Summary of the invention
Technical problem solved by the invention provides a kind of control method for pressure balance that improves the heat pump air conditioner of control reliability.
The technical solution adopted for the present invention to solve the technical problems is: the control method for pressure balance of heat pump air conditioner, in the process of refrigerastion during compressor operating, controller makes coil electricity or outage, when heating in the process compressor operating, controller is opposite when the power on/off state of coil is worked with compressor cooling, in the process of refrigerastion during compressor shutdown, the power on/off state in the power on/off state that controller makes coil and the process of heating during compressor operating is identical; And in the process of heating during compressor shutdown, the power on/off state in the power on/off state that controller makes coil and the process of refrigerastion during compressor operating is identical.
As a kind of preferred version wherein, during compressor operating, controller makes coil blackout in the process of refrigerastion, and during compressor shutdown, controller makes coil electricity; When heating in the process compressor operating, controller makes coil electricity, and during compressor shutdown, controller makes coil blackout.
As another kind of preferred version, during compressor operating, controller makes coil electricity in the process of refrigerastion, and during compressor shutdown, controller makes coil blackout; When heating in the process compressor operating, controller makes coil blackout, and during compressor shutdown, controller makes coil electricity.
The invention has the beneficial effects as follows: by changing the power on/off state of coil when the compressor shutdown; making is not increasing cost; under the prerequisite of assembling and security risk; the electromagnetism four-way change-over valve that uses by control heat pump air conditioner itself comes the refrigerant of height pressure in the switched system to flow to; make the height refrigerant pressure of air-conditioning system in compressor stop and start process be able to active balance; thereby reduce the resistance of start of compressor greatly; improve the compressor frequent starting Performance And Reliability under harsh entry conditions such as adverse circumstances and low-voltage especially, be particluarly suitable for applying on the heat pump air conditioner.
Description of drawings
Schematic diagram when Fig. 1 is positioned at the main valve body left end for slide block of the present invention;
Fig. 2 is the schematic diagram of slide block of the present invention when moving left the main valve body centre position;
Schematic diagram when Fig. 3 is positioned at the main valve body right-hand member for slide block of the present invention;
Fig. 4 is the schematic diagram of slide block of the present invention when moving right the main valve body centre position.
Be labeled as among the figure: electromagnetism four-way change-over valve 1, main valve body 2, guide valve 3, coil 4, controller 5, slide block 6, the first refrigerant mouth 7, the second refrigerant mouth 8, the 3rd refrigerant mouth 9, the 4th refrigerant mouth 10, capillary 11, the direction of arrow is the refrigerant flow direction of normal cooling and warming among the figure.
The specific embodiment
The present invention is described further below in conjunction with accompanying drawing.
As shown in Figures 1 to 4, the control method for pressure balance of heat pump air conditioner of the present invention, in the process of refrigerastion during compressor operating, controller 5 makes coil 4 energisings or outage, when heating in the process compressor operating, controller 5 is opposite when the power on/off state of coil 4 is worked with compressor cooling, and in the process of refrigerastion during compressor shutdown, the power on/off state in the power on/off state that controller 5 makes coil 4 and the process of heating during compressor operating is identical; And in the process of heating during compressor shutdown, the power on/off state in the power on/off state that controller 5 makes coil 4 and the process of refrigerastion during compressor operating is identical.Be in the process of refrigerastion during compressor operating, if coil 4 energisings, then in process of refrigerastion during compressor shutdown, just outage of coil 4.That is to say, in the process of refrigerastion during compressor operating,, then in the process of refrigerastion during compressor shutdown, just, the first refrigerant mouth 7 is communicated with the 4th refrigerant mouth 10 by the power on/off state of change coil 4 if the first refrigerant mouth 7 communicates with the 3rd refrigerant mouth 9; Similarly, in the process of refrigerastion during compressor operating,, then in the process of refrigerastion during compressor shutdown, just, the first refrigerant mouth 7 is communicated with the 3rd refrigerant mouth 9 by the power on/off state of change coil 4 if the first refrigerant mouth 7 communicates with the 4th refrigerant mouth 10.Also the same principle in the process of refrigerastion; can make air-conditioning system height pressure refrigerant in the very short time of compressor shutdown process, reach balance; promptly allow the resistance of start of compressor effectively reduce in a short period of time, improve the compressor frequent starting Performance And Reliability under harsh entry conditions such as adverse circumstances and low-voltage especially.
Embodiment 1:
In the process of refrigerastion during compressor operating, controller 5 makes coil 4 outages, at this moment, slide block 6 is positioned at the left end of main valve body 2, and the first refrigerant mouth 7 communicates with the 3rd refrigerant mouth 9 (this moment, the 3rd refrigerant mouth 9 linked to each other with the off-premises station heat exchanger), therefore, in process of refrigerastion during compressor shutdown, controller 5 makes coil 4 energisings, makes slide block 6 be positioned at the right-hand member of main valve body 2, and the first refrigerant mouth 7 is communicated with the 4th refrigerant mouth 10; And in the process of heating during compressor operating; controller 5 makes coil 4 energisings; slide block 6 is positioned at the right-hand member of main valve body 2; the first refrigerant mouth 7 communicates with the 4th refrigerant mouth 10; therefore, when heating in the process compressor shutdown, controller 5 makes coil 4 outages; make slide block 6 be positioned at the left end of main valve body 2, and the first refrigerant mouth 7 is communicated with the 3rd refrigerant mouth 9.The high-low pressure refrigerant is realized pressure balance in this handoff procedure.System's high-low pressure dynamic balance has aspect two in this process, and on the one hand as shown in Figure 2, in main valve body 2 inner slides 6 motion processes, height on the pressure side refrigerant is in conducting state in valve body 2 inside, can carry out to a certain degree balance to system's height pressure; After 6 motions of main valve body 2 inner slides put in place, the refrigerant mouth 7 of winning is switched with the 3rd refrigerant mouth 9, the 4th refrigerant mouth 10 respectively be communicated with on the other hand, therefore can make air-conditioning system height pressure refrigerant reach balance in the very short time.In the process of refrigerastion, make coil 4 power down after the pressure balance again, make 6 actions of main valve body 2 inner slides, refrigerant reverts to former refrigerating state and flows to, and starts compressor by control again, can allow the resistance of start of compressor effectively reduce in a short period of time.Heat in the process, coil 4 powered on, make the action of main valve body 2 inner slides 6, refrigerant revert to former heat state flow to, start compressor by control again, can allow the resistance of start of compressor effectively reduce in a short period of time.
Embodiment 2:
In the process of refrigerastion during compressor operating, controller 5 makes coil 4 energisings, at this moment, slide block 6 is positioned at the right-hand member of main valve body 2, and the first refrigerant mouth 7 communicates with the 4th refrigerant mouth 10 (this moment, the 4th refrigerant mouth 10 linked to each other with the off-premises station heat exchanger), therefore, in process of refrigerastion during compressor shutdown, controller 5 makes coil 4 outages, makes slide block 6 be positioned at the left end of main valve body 2, and the first refrigerant mouth 7 is communicated with the 3rd refrigerant mouth 9; And when heating in the process compressor operating; controller 5 makes coil 4 outages; slide block 6 is positioned at the left end of main valve body 2; the first refrigerant mouth 7 communicates with the 3rd refrigerant mouth 9; therefore, when heating in the process compressor shutdown, controller 5 makes coil 4 energisings; make slide block 6 be positioned at the right-hand member of main valve body 2, and the first refrigerant mouth 7 is communicated with the 4th refrigerant mouth 10.Its refrigeration and the principle that heats in the process are the same with embodiment 1, just exchange among the function of the 3rd refrigerant mouth 9 and the 4th refrigerant mouth 10 and the embodiment 1 at this moment.
In addition, when implementing, can also the break-make control time and the break-make control number of times of coil 4 in the electromagnetism four-way change-over valve 1 be adjusted, with balance refrigerant pressure to greatest extent according to the different working modes and the actual applying working condition of heat pump air conditioner.
Claims (3)
1. the control method for pressure balance of heat pump air conditioner, in the process of refrigerastion during compressor operating, controller (5) makes coil (4) energising or outage, when heating in the process compressor operating, controller (5) is opposite when the power on/off state of coil (4) is worked with compressor cooling, it is characterized in that: in the process of refrigerastion during compressor shutdown, the power on/off state in the power on/off state that controller (5) makes coil (4) and the process of heating during compressor operating is identical; And in the process of heating during compressor shutdown, the power on/off state in the power on/off state that controller (5) makes coil (4) and the process of refrigerastion during compressor operating is identical.
2. the control method for pressure balance of heat pump air conditioner as claimed in claim 1 is characterized in that: during compressor operating, controller (5) makes coil (4) outage in the process of refrigerastion, and during compressor shutdown, controller (5) makes coil (4) energising; When heating in the process compressor operating, controller (5) makes coil (4) energising, and during compressor shutdown, controller (5) makes coil (4) outage.
3. the control method for pressure balance of heat pump air conditioner as claimed in claim 1 is characterized in that: during compressor operating, controller (5) makes coil (4) energising in the process of refrigerastion, and during compressor shutdown, controller (5) makes coil (4) outage; When heating in the process compressor operating, controller (5) makes coil (4) outage, and during compressor shutdown, controller (5) makes coil (4) energising.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910311776A CN101738038A (en) | 2009-12-18 | 2009-12-18 | Control method for pressure balance of heat pump air conditioner |
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| CN200910311776A CN101738038A (en) | 2009-12-18 | 2009-12-18 | Control method for pressure balance of heat pump air conditioner |
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| CN101738038A true CN101738038A (en) | 2010-06-16 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411288A (en) * | 2013-07-26 | 2013-11-27 | 宁波奥克斯空调有限公司 | Method for preventing tripping in heating start of air conditioner |
| CN104896587A (en) * | 2015-05-27 | 2015-09-09 | 广东美的制冷设备有限公司 | Air conditioner |
| CN105627507A (en) * | 2015-12-24 | 2016-06-01 | 珠海格力电器股份有限公司 | Control method and device of four-way valve |
| CN106288215A (en) * | 2016-08-23 | 2017-01-04 | 珠海格力电器股份有限公司 | Control method of air conditioner |
| CN112923521A (en) * | 2021-02-05 | 2021-06-08 | 海信（山东）空调有限公司 | Air conditioner and control method |
-
2009
- 2009-12-18 CN CN200910311776A patent/CN101738038A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411288A (en) * | 2013-07-26 | 2013-11-27 | 宁波奥克斯空调有限公司 | Method for preventing tripping in heating start of air conditioner |
| CN104896587A (en) * | 2015-05-27 | 2015-09-09 | 广东美的制冷设备有限公司 | Air conditioner |
| CN104896587B (en) * | 2015-05-27 | 2018-01-09 | 广东美的制冷设备有限公司 | Air conditioner |
| CN105627507A (en) * | 2015-12-24 | 2016-06-01 | 珠海格力电器股份有限公司 | Control method and device of four-way valve |
| CN106288215A (en) * | 2016-08-23 | 2017-01-04 | 珠海格力电器股份有限公司 | Control method of air conditioner |
| CN112923521A (en) * | 2021-02-05 | 2021-06-08 | 海信（山东）空调有限公司 | Air conditioner and control method |
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Application publication date: 20100616 |