CN109813006B - Air conditioning system for improving refrigerating and heating capacity and control method - Google Patents
Air conditioning system for improving refrigerating and heating capacity and control method Download PDFInfo
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- CN109813006B CN109813006B CN201910036296.5A CN201910036296A CN109813006B CN 109813006 B CN109813006 B CN 109813006B CN 201910036296 A CN201910036296 A CN 201910036296A CN 109813006 B CN109813006 B CN 109813006B
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 45
- 238000010438 heat treatment Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 50
- 239000003507 refrigerant Substances 0.000 claims abstract description 27
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 238000001816 cooling Methods 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000005057 refrigeration Methods 0.000 claims description 2
- 238000004781 supercooling Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The invention discloses an air conditioning system for improving refrigerating and heating capacity and a control method thereof, and the air conditioning system comprises a compressor, a four-way valve, a gas-liquid separator, an indoor heat exchanger, an outdoor heat exchanger and an auxiliary heat exchange branch, wherein two ends of the auxiliary heat exchange branch are respectively connected in parallel with a main path of the air conditioning system between the indoor heat exchanger and the outdoor heat exchanger in a bypass mode, a section of heat exchange section penetrating through an inner cavity of the gas-liquid separator is arranged on the auxiliary heat exchange branch, and the auxiliary heat exchange branch is correspondingly started or closed based on whether a real-time temperature value of the inner cavity of the gas-liquid separator reaches a preset parameter state, so that a refrigerant in the main path of the air conditioning system is introduced into the gas-liquid separator through the auxiliary.
Description
Technical Field
The invention relates to the technical field of air conditioning systems, in particular to an air conditioning system for improving refrigerating and heating capacity and a control method.
Background
When the existing air conditioning system is in refrigeration operation, the cold quantity contained in the refrigerant in the gas-liquid separator is not reasonably applied, and the energy is wasted; when the air conditioning system is operated for heating, the ambient temperature is often too low, and the refrigerant does not completely exchange heat in the outdoor heat exchanger, so that the low pressure is too low, and the heating capacity is affected.
Therefore, how to utilize the refrigerant with incomplete heat exchange is an important technical problem for effectively improving the cooling/heating effect of the air conditioning system, and is a technical problem which needs to be solved urgently by practitioners.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an air conditioning system and a control method for improving the refrigerating and heating quantity, wherein the air conditioning system can fully utilize a refrigerant in a gas-liquid separator during refrigerating and heating.
In order to achieve the purpose, the air conditioning system for improving the refrigerating and heating capacity comprises a compressor, a four-way valve, a gas-liquid separator, an indoor heat exchanger and an outdoor heat exchanger, wherein the four-way valve is respectively communicated with the output end of the compressor, one end of the gas-liquid separator, one end of the indoor heat exchanger and one end of the outdoor heat exchanger, and the other end of the indoor heat exchanger is communicated with the other end of the outdoor heat exchanger; the other end of the gas-liquid separator is communicated with the input end of the compressor, the air-conditioning system further comprises an auxiliary heat exchange branch, wherein two ends of the auxiliary heat exchange branch are respectively in bypass parallel connection with a main path of the air-conditioning system between the indoor heat exchanger and the outdoor heat exchanger, a section of heat exchange section penetrating through the inner cavity of the gas-liquid separator is arranged on the auxiliary heat exchange branch, the auxiliary heat exchange branch is correspondingly started or closed based on whether the real-time temperature value of the inner cavity of the gas-liquid separator reaches a preset parameter state, and therefore refrigerants in the main path of the air-conditioning system are introduced into the gas-liquid separator through the auxiliary heat exchange branch to.
And the system further comprises a first electromagnetic valve arranged on the auxiliary heat exchange branch and a second electromagnetic valve arranged on a main path between the indoor heat exchanger and the outdoor heat exchanger.
The temperature-sensing device further comprises a temperature-sensing unit arranged in the gas-liquid separator, wherein the temperature-sensing unit is used for monitoring the temperature of the gas-liquid separator in real time.
And the oil-gas separator is further included, wherein two ends of the oil-gas separator are respectively communicated with the four-way valve and the output end of the compressor.
An auxiliary heat exchange branch is correspondingly started or closed based on whether the real-time temperature value of the inner cavity of a gas-liquid separator reaches a preset parameter state, so that a refrigerant in a main path of the air-conditioning system is introduced into the gas-liquid separator through the auxiliary heat exchange branch for heat exchange, and the auxiliary heat exchange branch is correspondingly started or closed.
Further, when the auxiliary heat exchange branch is started, the first electromagnetic valve is started and the second electromagnetic valve is closed, so that the refrigerant in the main path of the air-conditioning system flows into the gas-liquid separator through the auxiliary heat exchange branch for heat exchange and then flows back to the main path of the air-conditioning system;
when the auxiliary heat exchange branch is closed, the first electromagnetic valve is closed and the second electromagnetic valve is opened.
Furthermore, preset parameter states corresponding to different operation modes of the air conditioning system are compared with real-time temperature values monitored by the temperature sensing unit in real time, so that the auxiliary heat exchange branch is correspondingly started or closed.
The invention adopts the scheme, and has the beneficial effects that: the refrigerant introduced into the main path of the air-conditioning system through the auxiliary heat exchange branch circuit is subjected to heat exchange in the gas-liquid separator, so that the supercooling of the refrigerant is increased and the refrigerating capacity is improved when the air-conditioning system is used for refrigerating, and the low-pressure and the heating capacity are increased when the air-conditioning system is used for heating; by the mode, the refrigerant in the gas-liquid separator is fully utilized, and the effect of improving the heating/cooling capacity is realized.
Drawings
Fig. 1 is a schematic diagram of the composition structure of the air conditioning system of the present invention.
The system comprises a compressor 1, an oil-gas separator 2, a four-way valve 3, a gas-liquid separator 4, an indoor heat exchanger 5, an outdoor heat exchanger 6, an expansion valve 7, a heat exchange section 8, a first electromagnetic valve 9, a second electromagnetic valve 10 and a temperature sensing unit 11.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, in this embodiment, an air conditioning system for improving cooling and heating capacity includes a compressor 1, an oil-gas separator 2, a four-way valve 3, a gas-liquid separator 4, an indoor heat exchanger 5, an outdoor heat exchanger 6, and an expansion valve 7, where the four-way valve 3 includes four interfaces, i.e., an interface a, an interface B, an interface C, and an interface D, where the interface a, the interface B, the interface C, and the interface D of the four-way valve are respectively communicated with one end of the oil-gas separator 2, one end of the outdoor heat exchanger 6, one end of the gas-liquid separator 4, and one; two ends of the expansion valve 7 are respectively communicated with the other end of the indoor heat exchanger 5 and the other end of the outdoor heat exchanger 6; the other end of the gas-liquid separator 4 is communicated with the input end of the compressor 1; the above-mentioned structure constitutes the refrigerant circulation flow path of the air conditioning system.
In this embodiment, the heat exchanger further comprises an auxiliary heat exchange branch, wherein two ends of the auxiliary heat exchange branch are respectively bypassed and connected in parallel to the main path of the air conditioning system between the indoor heat exchanger and the outdoor heat exchanger, that is, two ends of the auxiliary heat exchange branch are bypassed and connected in parallel to the main path between the expansion valve 7 and the indoor heat exchanger 5, so as to implement parallel arrangement with the main path. In addition, be provided with one section and wear to establish the heat transfer section 8 in the gas-liquid separator 4 inner chamber on the supplementary heat transfer branch road, through such setting to the refrigerant flows into supplementary heat transfer branch road, and the refrigerant that stores in 8 departments and the gas-liquid separator 4 of heat transfer section carries out the heat exchange afterwards, flows into supplementary heat transfer branch road at last.
In this embodiment, the heat exchanger further includes a first electromagnetic valve 9 disposed on the auxiliary heat exchange branch and a second electromagnetic valve 10 disposed on the main path between the indoor heat exchanger and the outdoor heat exchanger, that is, the first electromagnetic valve 9 of this embodiment is disposed on the auxiliary heat exchange branch, and the on/off of the auxiliary heat exchange branch is controlled by the opening/closing of the first electromagnetic valve 9; the second solenoid valve 10 of this embodiment is located between two connection end points of the auxiliary heat exchange branch and the main path, and the on/off of the main path between the expansion valve 7 and the indoor heat exchanger 5 is controlled by the on/off of the second solenoid valve 10.
In this embodiment, the temperature sensing unit 11 is further included in the gas-liquid separator, and the temperature of the gas-liquid separator 4 is monitored in real time by using the temperature sensing unit 11, so as to feed back the monitored temperature value to the air conditioning system, so that the air conditioning system compares the real-time temperature value with the preset parameter state, and accordingly the auxiliary heat exchange branch is relatively started or closed, that is, the auxiliary branch or the main path is correspondingly selected to be started/closed by controlling the opening/closing action of the first electromagnetic valve 9 or the second electromagnetic valve 10.
For ease of understanding, the air conditioning system described above is further described in connection with a particular control method.
In this embodiment, preset parameter states corresponding to different operation modes of the air conditioning system are compared with real-time temperature values monitored by the temperature sensing unit 11 in real time, so as to correspondingly start or close the auxiliary heat exchange branch.
The first condition is as follows: when the air conditioning system operates in a refrigerating mode, when the temperature sensing unit 11 monitors that the temperature in the gas-liquid separator 4 is lower than a preset parameter state (namely T is less than or equal to 20 ℃), the first electromagnetic valve 9 is opened at the moment, the second electromagnetic valve 10 is closed, so that the auxiliary heat exchange branch is started, the refrigerant in the main path enters the heat exchange section 8 of the auxiliary heat exchange branch through the first electromagnetic valve 9 after being throttled by the expansion valve 7, exchanges heat with the low-temperature and low-pressure refrigerant in the gas-liquid separator 4 for supercooling, and then flows into the indoor heat exchanger through the auxiliary heat exchange branch for evaporation. The refrigerant is subjected to heat exchange and supercooling with the gas-liquid separator 4 through the auxiliary heat exchange branch, so that the evaporation temperature is reduced, and the refrigerating capacity is improved. The temperature in the gas-liquid separator 4 can gradually rise along with the continuous operation and opening of the auxiliary heat exchange branch, and the supercooling effect can gradually fall, so that when the temperature sensing unit 11 monitors that the temperature in the gas-liquid separator 4 is higher than a preset parameter state (namely, T is higher than 20 ℃), the first electromagnetic valve 9 is closed, the second electromagnetic valve 10 is opened, the refrigerant throttled by the expansion valve 7 directly enters the indoor heat exchanger 5 for heat exchange through the second electromagnetic valve 10, and the problem of overhigh low pressure in the gas-liquid separator 4 can not be solved through the mode.
Case two: when the air conditioning system is in a heating state, when the temperature sensing unit 11 monitors that the temperature in the gas-liquid separator 4 is lower than a preset parameter state (i.e., T is less than or equal to 10 ℃), the first electromagnetic valve 9 is opened, the second electromagnetic valve 10 is closed, and the auxiliary heat exchange branch is started, that is, medium-pressure medium-temperature refrigerant after heat exchange of the indoor heat exchanger 5 flows into the heat exchange section 8 of the auxiliary heat exchanger branch to release heat, then flows to the expansion valve 7 through the first electromagnetic valve 9 to be throttled, and the throttled refrigerant enters the outdoor heat exchanger 6. The medium-pressure medium-temperature refrigerant after heat exchange of the indoor heat exchanger 5 transfers heat to the low-temperature low-pressure refrigerant in the gas-liquid separator 4, so that the low-pressure refrigerant is evaporated, the low-pressure under heating is improved, the liquid impact risk is reduced, and the heating capacity is improved. The temperature in the gas-liquid separator 4 will gradually rise along with the continuous operation and opening of the auxiliary heat exchange branch, so that when the temperature sensing unit 11 monitors that the temperature in the gas-liquid separator 4 is higher than a preset parameter state (i.e., T > 10 ℃), the first electromagnetic valve 9 is closed, the second electromagnetic valve 10 is opened, and the refrigerant subjected to heat exchange by the indoor heat exchanger 5 directly enters the outdoor heat exchanger 6 for heat exchange after being throttled by the second electromagnetic valve 10 and the expansion valve 7 in sequence, so as to ensure that the low pressure at this time is not too high.
The above-described embodiments are merely preferred embodiments of the present invention, which is not intended to limit the present invention in any way. Those skilled in the art can make many changes, modifications, and equivalents to the embodiments of the invention without departing from the scope of the invention as set forth in the claims below. Therefore, equivalent variations made according to the idea of the present invention should be covered within the protection scope of the present invention without departing from the contents of the technical solution of the present invention.
Claims (7)
1. An air conditioning system for improving refrigeration and heating capacity comprises a compressor (1), a four-way valve (3), a gas-liquid separator (4), an indoor heat exchanger and an outdoor heat exchanger, wherein the four-way valve (3) is respectively communicated with the output end of the compressor (1), one end of the gas-liquid separator (4), one end of the indoor heat exchanger and one end of the outdoor heat exchanger, and the other end of the indoor heat exchanger is communicated with the other end of the outdoor heat exchanger; the other end of the gas-liquid separator (4) is communicated with the input end of the compressor, and the gas-liquid separator is characterized in that: the air conditioner system is characterized by further comprising an auxiliary heat exchange branch, wherein two ends of the auxiliary heat exchange branch are respectively connected in parallel to the main path of the air conditioner system between the indoor heat exchanger and the outdoor heat exchanger in a bypassing manner, a heat exchange section (8) penetrating through the inner cavity of the gas-liquid separator (4) is arranged on the auxiliary heat exchange branch, the auxiliary heat exchange branch is correspondingly started or closed based on whether the real-time temperature value of the inner cavity of the gas-liquid separator (4) reaches a preset parameter state, and therefore a refrigerant in the main path of the air conditioner system is led into the gas-liquid separator through the auxiliary heat exchange branch to perform heat exchange.
2. An air conditioning system for increasing the amount of cooling and heating as claimed in claim 1, wherein: the heat exchanger also comprises a first electromagnetic valve (9) arranged on the auxiliary heat exchange branch and a second electromagnetic valve (10) arranged on the main path between the indoor heat exchanger and the outdoor heat exchanger.
3. An air conditioning system for increasing the amount of cooling and heating as claimed in claim 1, wherein: the temperature-sensing device also comprises a temperature-sensing unit (11) arranged in the gas-liquid separator (4), wherein the temperature-sensing unit (11) is used for monitoring the temperature of the gas-liquid separator (4) in real time.
4. An air conditioning system for increasing the amount of cooling and heating as claimed in claim 1, wherein: the oil-gas separator is characterized by further comprising an oil-gas separator (2), wherein two ends of the oil-gas separator (2) are respectively communicated with the four-way valve (3) and the output end of the compressor (1).
5. A control method of an air conditioning system for increasing the amount of cooling and heating as claimed in any one of claims 1 to 4, characterized in that: the auxiliary heat exchange branch is correspondingly started or closed based on whether the real-time temperature value of the inner cavity of the gas-liquid separator reaches a preset parameter state, so that the refrigerant in the main path of the air-conditioning system is introduced into the gas-liquid separator through the auxiliary heat exchange branch for heat exchange, and the auxiliary heat exchange branch is correspondingly started or closed.
6. The control method of the air conditioning system for increasing the amount of cooling and heating according to claim 5, wherein:
when the auxiliary heat exchange branch is started, the first electromagnetic valve (9) is started and the second electromagnetic valve (10) is closed, so that the refrigerant in the main path of the air-conditioning system flows into the gas-liquid separator (4) through the auxiliary heat exchange branch for heat exchange and then flows back to the main path of the air-conditioning system;
when the auxiliary heat exchange branch is closed, the first electromagnetic valve (9) is closed and the second electromagnetic valve (10) is opened.
7. The control method of the air conditioning system for increasing the amount of cooling and heating according to claim 6, wherein: and preset parameter states corresponding to different operation modes of the air conditioning system are compared with real-time temperature values monitored by the temperature sensing unit (11) in real time, so that the auxiliary heat exchange branch is correspondingly started or closed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910036296.5A CN109813006B (en) | 2019-01-15 | 2019-01-15 | Air conditioning system for improving refrigerating and heating capacity and control method |
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| CN201910036296.5A CN109813006B (en) | 2019-01-15 | 2019-01-15 | Air conditioning system for improving refrigerating and heating capacity and control method |
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| CN109813006B true CN109813006B (en) | 2020-10-27 |
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| CN113339946B (en) * | 2021-05-19 | 2022-08-30 | 广东Tcl智能暖通设备有限公司 | Air conditioner operation control method and device, air conditioner and computer storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02298763A (en) * | 1989-05-15 | 1990-12-11 | Hitachi Ltd | Refrigeration equipment |
| JP2000018739A (en) * | 1998-06-26 | 2000-01-18 | Matsushita Refrig Co Ltd | Heating-cooling combination device |
| CN1232787C (en) * | 2003-05-21 | 2005-12-21 | 北京建筑工程学院 | Low temperature air heat source heat pump system |
| JP5947023B2 (en) * | 2011-11-14 | 2016-07-06 | 東京エレクトロン株式会社 | Temperature control apparatus, plasma processing apparatus, processing apparatus, and temperature control method |
| CN104329839B (en) * | 2013-07-22 | 2016-09-21 | 广东美的暖通设备有限公司 | Air conditioning system and low-temperature starting control method thereof |
| CN204313513U (en) * | 2014-10-24 | 2015-05-06 | 林龙朝 | Overlapping both cooling and heating high temperature heat pump |
| CN205448428U (en) * | 2016-02-22 | 2016-08-10 | 青岛海信电子设备股份有限公司 | Take hot switching function's vapour and liquid separator and air conditioning system |
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Address after: No. 1 by villagers' group of helongsha, Shengli village, Lishui Town, Nanhai District, Foshan City, Guangdong Province Patentee after: Guangdong Kaili HVAC Co.,Ltd. Address before: No. 1 by villagers' group of helongsha, Shengli village, Lishui Town, Nanhai District, Foshan City, Guangdong Province Patentee before: GUANGDONG CHIGO HEATING AND VENTILATION EQUIPMENT Co.,Ltd. |