CN103776119A - Multi-split air conditioner heat pump system, refrigeration control method thereof and heating control method thereof - Google Patents
Multi-split air conditioner heat pump system, refrigeration control method thereof and heating control method thereof Download PDFInfo
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- CN103776119A CN103776119A CN201410060592.6A CN201410060592A CN103776119A CN 103776119 A CN103776119 A CN 103776119A CN 201410060592 A CN201410060592 A CN 201410060592A CN 103776119 A CN103776119 A CN 103776119A
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Abstract
The invention discloses a multi-split air conditioner heat pump system, a refrigeration control method thereof and a heating control method thereof. The multi-split air conditioner heat pump system comprises a compressor (1), an oil separator (4), a four-way valve (5), a condenser (6), a gas-liquid separator (7), an outdoor unit main electronic expansion valve (8), an outdoor unit side stop valve (18) and an auxiliary electronic expansion valve (7), one end of the auxiliary electronic expansion valve (7) is connected between the four-way valve (5) and the condenser (6), the other end of the auxiliary electronic expansion valve (7) is connected between the outdoor unit main electronic expansion valve (8) and the outdoor unit side stop valve (18), a high-pressure switch (2) and a high-pressure sensor (3) are arranged on an output pipeline communicated with an output end of the compressor (1), and a low-pressure switch (11) and a low-pressure sensor (12) are arranged on an input pipeline connected with an input end of the compressor (1). The multi-split air conditioner heat pump system improves system running stability.
Description
Technical field
The present invention relates to air conditioner technical field, particularly a kind of multi-gang air-conditioner heat pump and refrigeration control method and heat-production control method.
Background technology
Multi-connected machine is commonly called as " one drag many ", refers to an off-premises station and connects many indoor sets by pipe arrangement.The plurality of advantages such as that multi-connected machine system has is energy-conservation, comfortable, smooth running, and each room can independently regulate, and can meet the not demand of the different air conditioner loads of chummery.In small and medium construction and part public building, obtain increasingly extensive application.
At present, in existing multi-gang air-conditioner heat pump, under little load, little cold operating mode, because system condensing is effective, condensing pressure is very low, and compressor output quantity is excessive, directly causes the evaporating pressure of system lower.Because system height pressure reduction is less, interior machine low-temperature protection frequently, and the start-stop of high frequent, lubricating oil is discharged and cannot return smoothly by compressor is a large amount of, has a strong impact on compressor service life,
System run all right is not high; Under little load, large thermal condition, because evaporation effect is good, evaporating pressure is high, and compressor output quantity is excessive, directly causes condensing pressure very high, even can exceed the safe operation scope of compressor when serious, and system run all right is not high.
Therefore, how improving system run all right, is the art personnel problem demanding prompt solutions.
Summary of the invention
In view of this, the invention provides a kind of multi-gang air-conditioner heat pump, to improve system run all right.The present invention also provides a kind of refrigeration control method of multi-gang air-conditioner heat pump and the heat-production control method of multi-gang air-conditioner heat pump.
For achieving the above object, the invention provides following technical scheme:
A kind of multi-gang air-conditioner heat pump, comprise compressor, oil eliminator, cross valve, the condenser being connected with described cross valve, gas-liquid separator and the outdoor owner's electric expansion valve being connected away from one end of described cross valve with described condenser, the outdoor pusher side stop valve being connected away from one end of described condenser with described outdoor owner's electric expansion valve;
Also comprise auxiliary electron expansion valve, one end of described auxiliary electron expansion valve is connected between described cross valve and described condenser, and the other end is connected between described outdoor owner's electric expansion valve and described outdoor pusher side stop valve;
On the output channel being communicated with the output of described compressor, be provided with high-voltage switch gear and high-pressure sensor; On the input channel being connected with the input of described compressor, be provided with low tension switch and low-pressure sensor.
Preferably, in above-mentioned multi-gang air-conditioner heat pump, described outdoor pusher side stop valve is parallel with multiple heat exchangers away from one end of described condenser.
Preferably, in above-mentioned multi-gang air-conditioner heat pump, described heat exchanger is air cooling heat exchanger or water cooling heat exchanger.
Preferably, in above-mentioned multi-gang air-conditioner heat pump, the quantity of described compressor is one, and it is frequency-changeable compressor.
Preferably, in above-mentioned multi-gang air-conditioner heat pump, the quantity of described multi-compressor is two, and one of them is frequency-changeable compressor; Two described compressor parallels.
Preferably, in above-mentioned multi-gang air-conditioner heat pump, the quantity of described compressor is two, and two described compressors are invariable frequency compressor and both parallel connections.
Preferably, in above-mentioned multi-gang air-conditioner heat pump, the oil outlet end of described oil eliminator is communicated with the first output channel and the second output channel;
Described the first output channel is connected with oily balance stop valve, and described the second output channel is communicated with the input of the compressor of described multi-gang air-conditioner heat pump, on described the second output channel, is provided with magnetic valve.
Preferably, in above-mentioned multi-gang air-conditioner heat pump, the oil outlet end of described oil eliminator is provided with check valve.
The present invention also provides a kind of refrigeration control method of multi-gang air-conditioner heat pump, is applied in the multi-gang air-conditioner heat pump as described in above-mentioned any one, comprises step:
Detect the high-voltage value of detection system and low voltage value;
Calculate, calculate the pressure reduction of described high-voltage value and described low voltage value;
Judgement, in the time that described pressure reduction is less than pressure reduction preset value, opens auxiliary electron expansion valve.
The present invention also provides a kind of heat-production control method of multi-gang air-conditioner heat pump, is applied in the multi-gang air-conditioner heat pump as described in above-mentioned any one, comprises step:
Detect the high-voltage value of detection system;
Judgement, in the time that described high-voltage value is greater than high pressure preset value, opens described auxiliary electron expansion valve.
Can find out that from above-mentioned technical scheme multi-gang air-conditioner heat pump provided by the invention draws the high-voltage value of system according to the high-voltage switch gear arranging on the output channel being communicated with the output of compressor and high-pressure sensor; The low tension switch arranging on the input channel connecting according to the input of compressor and low-pressure sensor draw the low voltage value of system, judge whether to need to open the effect to reach the cold medium flux that regulates condenser by high-voltage value and low voltage value: under cooling condition, little load, the little cold operating mode condensing pressure that makes to freeze significantly reduces, open auxiliary electron expansion valve, the gaseous coolant bypass that compressor is discharged is to outdoor pusher side stop valve, reduce the cold medium flux of condenser, reduce condensation effect, and then guarantee the height pressure reduction of system to make system stable operation; Under heating condition, little load, large thermal condition make evaporating pressure higher, cause condensing pressure higher, unlatching helps electric expansion valve, by the refrigerant that flows to condenser through four-way valve bypass to gas-liquid separator, weaken the evaporability of condenser, to reduce the high and low pressure of system, guarantee safety, the reliability service of multi-gang air-conditioner heat pump.Multi-gang air-conditioner heat pump provided by the invention, by auxiliary electron expansion valve is set, making increases system pressure in little load, little cold operating mode, and reduces system pressure at little load, large thermal condition, greatly improves the reliability of multi-gang air-conditioner heat pump.
The embodiment of the present invention also provides a kind of refrigeration control method and heat-production control method of multi-gang air-conditioner heat pump, the refrigeration control method of the multi-gang air-conditioner heat pump providing due to the embodiment of the present invention and heat-production control method are applied in above-mentioned any multi-gang air-conditioner heat pump, therefore, also have and similarly technique effect of above-mentioned multi-gang air-conditioner heat pump, at this not in detailed introduction.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The structural representation of the multi-gang air-conditioner heat pump that Fig. 1 provides for the embodiment of the present invention.
The specific embodiment
The invention discloses a kind of multi-gang air-conditioner heat pump, to improve system run all right.The present invention also provides a kind of refrigeration control method of multi-gang air-conditioner heat pump and the heat-production control method of multi-gang air-conditioner heat pump.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Please refer to Fig. 1, the structural representation of the multi-gang air-conditioner heat pump that Fig. 1 provides for the embodiment of the present invention.
As shown in Figure 1, the multi-gang air-conditioner heat pump that the embodiment of the present invention provides, the condenser 6 that comprises cross valve 5, be connected with cross valve 5, the outdoor owner's electric expansion valve 8 being connected away from one end of cross valve 5 with condenser 6, the outdoor pusher side stop valve 18 being connected away from one end of condenser 6 with outdoor owner's electric expansion valve 8; It is characterized in that, also comprise auxiliary electron expansion valve 7, one end of auxiliary electron expansion valve 7 is connected between cross valve 5 and condenser 6, and the other end is connected between outdoor owner's electric expansion valve 8 and outdoor pusher side stop valve 18.
The multi-gang air-conditioner heat pump that the embodiment of the present invention provides, draws the high-voltage value of system according to the high-voltage switch gear 2 arranging on the output channel being communicated with the output of compressor 1 and high-pressure sensor 3, the low tension switch 11 arranging on the input channel connecting according to the input of compressor 1 and low-pressure sensor 12 draw the low voltage value of system, judge whether to need to open the effect to reach the cold medium flux that regulates condenser 6 by high-voltage value and low voltage value: under cooling condition, little load, the little cold operating mode condensing pressure that makes to freeze significantly reduces, open auxiliary electron expansion valve 7, the gaseous coolant bypass that compressor 1 is discharged is to outdoor pusher side stop valve 18, reduce the cold medium flux of condenser 6, reduce condensation effect, and then guarantee the height pressure reduction of system, make system stable operation, under heating condition, little load, large thermal condition make evaporating pressure higher, cause condensing pressure higher, unlatching helps electric expansion valve 7, by the refrigerant that flows to condenser 6 through cross valve 5 bypass to gas-liquid separator 9, weaken the evaporability of condenser 6, to reduce the high and low pressure of system, guarantee safety, the reliability service of multi-gang air-conditioner heat pump.The multi-gang air-conditioner heat pump that the embodiment of the present invention provides, by auxiliary electron expansion valve 7 is set, making increases system pressure in little load, little cold operating mode, and reduces system pressure at little load, large thermal condition, greatly improves the reliability of multi-gang air-conditioner heat pump.
Further, outdoor pusher side stop valve 18 is parallel with multiple heat exchangers away from one end of condenser 6.As shown in Figure 1, in the present embodiment, the quantity of heat exchanger is two, is respectively First Heat Exchanger 16 and the second heat exchanger 17, and one end that one end of First Heat Exchanger 16 is in series with the first electric expansion valve 14, the second heat exchangers 17 is in series with the second electric expansion valve 15.
Preferably, heat exchanger is air cooling heat exchanger or water cooling heat exchanger.In the present embodiment, First Heat Exchanger 16 and the second heat exchanger 17 are air cooling heat exchanger or are water cooling heat exchanger.
In the first embodiment, the quantity of the compressor 1 of multi-gang air-conditioner heat pump is one, and it is frequency-changeable compressor.
In the second embodiment, the quantity of the compressor 1 of multi-gang air-conditioner heat pump is two, and one of them is frequency-changeable compressor; Two compressor 1 parallel connections.Two compressors 1 can be frequency-changeable compressor, also can one be frequency-changeable compressor, another is invariable frequency compressor.
In the third embodiment, the quantity of the compressor 1 of multi-gang air-conditioner heat pump is two, and two compressors 1 are invariable frequency compressor and both parallel connections.
For the ease of the adjusting of fluid, the oil outlet end of the oil eliminator 4 of multi-gang air-conditioner heat pump is communicated with the first output channel and the second output channel; The first output channel is connected with oily balance stop valve 13, and the second output channel is communicated with the input of the compressor 1 of multi-gang air-conditioner heat pump, is provided with magnetic valve 10 on the second output channel., by the interior recirculating oil quantity to compressor 1 of magnetic valve 10 regulation oil separator 4.
Further, the oil outlet end of oil eliminator 4 is provided with check valve.By check valve is set, effectively avoid fluid to reflux, improve system run all right.
The embodiment of the present invention also provides a kind of refrigeration control method of multi-gang air-conditioner heat pump, is applied in above-mentioned any multi-gang air-conditioner heat pump, comprises step:
Detect the high-voltage value of detection system and low voltage value;
Detect the high-voltage value of the system that draws by high-pressure sensor 3, and, the low voltage value of the system that draws detected by low-pressure sensor 12.
Calculate, calculate the pressure reduction of high-voltage value and low voltage value.
Judgement, in the time that pressure reduction is less than pressure reduction preset value, opens auxiliary electron expansion valve 7.
The refrigeration control method of the multi-gang air-conditioner heat pump providing due to the embodiment of the present invention is applied in above-mentioned any multi-gang air-conditioner heat pump, therefore, also have and similarly technique effect of above-mentioned multi-gang air-conditioner heat pump, at this not in detailed introduction.
Preferably, pressure reduction preset value is set to 1.05Mpa.
The embodiment of the present invention also provides a kind of heat-production control method of multi-gang air-conditioner heat pump, is applied in above-mentioned any multi-gang air-conditioner heat pump, comprises step:
Detect the high-voltage value of detection system; , detect the high-voltage value of the system that draws by high-pressure sensor 3.
Judgement, in the time that high-voltage value is greater than high pressure preset value, opens auxiliary electron expansion valve 7.
The heat-production control method of the multi-gang air-conditioner heat pump providing due to the embodiment of the present invention is applied in above-mentioned any multi-gang air-conditioner heat pump, therefore, also have and similarly technique effect of above-mentioned multi-gang air-conditioner heat pump, at this not in detailed introduction.
Preferably, high pressure preset value is set to 3.55Mpa.
In this description, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment, between each embodiment identical similar part mutually referring to.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the present invention.To be apparent for those skilled in the art to the multiple modification of these embodiment, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a multi-gang air-conditioner heat pump, comprise compressor (1), oil eliminator (4), cross valve (5), the condenser (6) being connected with described cross valve (5), gas-liquid separator (7) and the outdoor owner's electric expansion valve (8) being connected away from one end of described cross valve (5) with described condenser (6), the outdoor pusher side stop valve (18) being connected away from one end of described condenser (6) with described outdoor owner's electric expansion valve (8); It is characterized in that,
Also comprise auxiliary electron expansion valve (7), one end of described auxiliary electron expansion valve (7) is connected between described cross valve (5) and described condenser (6), and the other end is connected between described outdoor owner's electric expansion valve (8) and described outdoor pusher side stop valve (18);
On the output channel being communicated with the output of described compressor (1), be provided with high-voltage switch gear (2) and high-pressure sensor (3); On the input channel being connected with the input of described compressor (1), be provided with low tension switch (11) and low-pressure sensor (12).
2. multi-gang air-conditioner heat pump as claimed in claim 1, is characterized in that, described outdoor pusher side stop valve (18) is parallel with multiple heat exchangers away from one end of described condenser (6).
3. multi-gang air-conditioner heat pump as claimed in claim 2, is characterized in that, described heat exchanger is air cooling heat exchanger or water cooling heat exchanger.
4. multi-gang air-conditioner heat pump as claimed in claim 1, is characterized in that, the quantity of described compressor (1) is one, and it is frequency-changeable compressor.
5. multi-gang air-conditioner heat pump as claimed in claim 1, is characterized in that, the quantity of described multi-compressor (1) is two, and one of them is frequency-changeable compressor; Two described compressors (1) parallel connection.
6. multi-gang air-conditioner heat pump as claimed in claim 1, is characterized in that, the quantity of described compressor (1) is two, and two described compressors (1) are invariable frequency compressor and both are in parallel.
7. multi-gang air-conditioner heat pump as claimed in claim 1, is characterized in that, the oil outlet end of described oil eliminator (4) is communicated with the first output channel and the second output channel;
Described the first output channel is connected with oily balance stop valve (13), and described the second output channel is communicated with the input of the compressor (1) of described multi-gang air-conditioner heat pump, is provided with magnetic valve (10) on described the second output channel.
8. multi-gang air-conditioner heat pump as claimed in claim 7, is characterized in that, the oil outlet end of described oil eliminator (4) is provided with check valve.
9. a refrigeration control method for multi-gang air-conditioner heat pump, is applied in the multi-gang air-conditioner heat pump as described in claim 1-8 any one, it is characterized in that, comprises step:
Detect the high-voltage value of detection system and low voltage value;
Calculate, calculate the pressure reduction of described high-voltage value and described low voltage value;
Judgement, in the time that described pressure reduction is less than pressure reduction preset value, opens described auxiliary electron expansion valve (7).
10. a heat-production control method for multi-gang air-conditioner heat pump, is applied in the multi-gang air-conditioner heat pump as described in claim 1-8 any one, it is characterized in that, comprises step:
Detect the high-voltage value of detection system;
Judgement, in the time that described high-voltage value is greater than high pressure preset value, opens described auxiliary electron expansion valve (7).
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| CN201410060592.6A CN103776119A (en) | 2014-02-21 | 2014-02-21 | Multi-split air conditioner heat pump system, refrigeration control method thereof and heating control method thereof |
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| CN201410060592.6A CN103776119A (en) | 2014-02-21 | 2014-02-21 | Multi-split air conditioner heat pump system, refrigeration control method thereof and heating control method thereof |
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| CN104197499A (en) * | 2014-09-01 | 2014-12-10 | 广东志高暖通设备股份有限公司 | Multi-connection air conditioning system |
| CN104197432A (en) * | 2014-09-01 | 2014-12-10 | 广东志高暖通设备股份有限公司 | Multi-connection air conditioning system and refrigeration method |
| CN104315658A (en) * | 2014-10-23 | 2015-01-28 | 广东美的暖通设备有限公司 | Air conditioning system control method and air conditioning system |
| CN104566810A (en) * | 2014-12-26 | 2015-04-29 | 宁波奥克斯电气有限公司 | Method of judging whether domestic multi-split inverter compressor idles during refrigerating |
| CN104654679A (en) * | 2015-02-12 | 2015-05-27 | 珠海格力电器股份有限公司 | Condensing system, air-cooled air conditioning system and control method |
| CN105571076A (en) * | 2016-01-20 | 2016-05-11 | 青岛海尔空调电子有限公司 | Control method for refrigerating of water-cooled multi-split air conditioner |
| CN106247685A (en) * | 2016-08-15 | 2016-12-21 | 广东志高暖通设备股份有限公司 | A kind of multi-online air-conditioning system and the method preventing oil balance tube booster thereof |
| CN111578467A (en) * | 2020-05-12 | 2020-08-25 | 广东美的制冷设备有限公司 | Control method of air conditioning system and air conditioning system |
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| CN104089347A (en) * | 2014-06-24 | 2014-10-08 | 广东申菱空调设备有限公司 | Low-temperature air-cooled water chiller unit and control method thereof |
| CN104197499A (en) * | 2014-09-01 | 2014-12-10 | 广东志高暖通设备股份有限公司 | Multi-connection air conditioning system |
| CN104197432A (en) * | 2014-09-01 | 2014-12-10 | 广东志高暖通设备股份有限公司 | Multi-connection air conditioning system and refrigeration method |
| CN104315658A (en) * | 2014-10-23 | 2015-01-28 | 广东美的暖通设备有限公司 | Air conditioning system control method and air conditioning system |
| CN104566810B (en) * | 2014-12-26 | 2017-09-05 | 宁波奥克斯电气股份有限公司 | The method whether frequency-changeable compressor of domestic multi-connection machine dallies is judged during refrigeration |
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| CN104654679A (en) * | 2015-02-12 | 2015-05-27 | 珠海格力电器股份有限公司 | Condensing system, air-cooled air conditioning system and control method |
| CN105571076A (en) * | 2016-01-20 | 2016-05-11 | 青岛海尔空调电子有限公司 | Control method for refrigerating of water-cooled multi-split air conditioner |
| CN105571076B (en) * | 2016-01-20 | 2019-08-20 | 青岛海尔空调电子有限公司 | A kind of control method of water-cooled multi-connected mechanism cold |
| CN106247685A (en) * | 2016-08-15 | 2016-12-21 | 广东志高暖通设备股份有限公司 | A kind of multi-online air-conditioning system and the method preventing oil balance tube booster thereof |
| CN111578467A (en) * | 2020-05-12 | 2020-08-25 | 广东美的制冷设备有限公司 | Control method of air conditioning system and air conditioning system |
| CN111609536A (en) * | 2020-06-03 | 2020-09-01 | 广东美的暖通设备有限公司 | Multi-split air conditioning system, control method and computer readable storage medium |
| CN111609536B (en) * | 2020-06-03 | 2021-09-03 | 广东美的暖通设备有限公司 | Multi-split air conditioning system, control method and computer readable storage medium |
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Application publication date: 20140507 |