CN211977168U - Air conditioning system for preventing heating and frost accumulation - Google Patents
Air conditioning system for preventing heating and frost accumulation Download PDFInfo
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- CN211977168U CN211977168U CN202020381070.7U CN202020381070U CN211977168U CN 211977168 U CN211977168 U CN 211977168U CN 202020381070 U CN202020381070 U CN 202020381070U CN 211977168 U CN211977168 U CN 211977168U
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Abstract
The utility model discloses an air conditioning system for preventing heating and frosting, which comprises a compressor, a four-way valve, an outdoor heat exchanger and an indoor heat exchanger, wherein the four-way valve is respectively connected with a return port of the compressor, an outlet of the compressor, the outdoor heat exchanger and the indoor heat exchanger, the outdoor heat exchanger is connected with the indoor heat exchanger, the air conditioning system also comprises an auxiliary heat exchanger, a first electromagnetic valve and a second electromagnetic valve, wherein, two ends of the first electromagnetic valve are respectively connected with the outlet of the compressor and the four-way valve; a first refrigerant flow path and a second refrigerant flow path which can exchange heat are arranged in the auxiliary heat exchanger, one end of the first refrigerant flow path is connected between the first electromagnetic valve and the port a of the four-way valve in a bypass mode, the other end of the first refrigerant flow path is connected to one end of the second electromagnetic valve, and the other end of the second electromagnetic valve is connected between the first electromagnetic valve and the outlet of the compressor; and two ends of the second refrigerant flow path are respectively connected with a d port of the four-way valve and a return air port of the compressor.
Description
Technical Field
The utility model belongs to the technical field of air conditioning system's technique and specifically relates to indicate an air conditioning system who prevents heating frost.
Background
In the heating process, the frosting of an air conditioner outdoor unit is always a relatively headache problem in the industry, particularly under the condition of low outdoor environment, the outdoor coil pipe is in a low-temperature state, and water in the air is condensed on the surface of an outdoor heat exchanger to cause frosting. The frost of the outdoor heat exchanger can block the channel between the fins, influence the heat exchange and reduce the heating capacity. The outdoor prior defrosting technology is realized mostly by reversing through a four-way valve, an air conditioner does not heat in the defrosting process, and if the defrosting time is too long, the indoor comfort is influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide a quick response, the travelling comfort is good prevent heating the air conditioning system who frosts.
In order to achieve the above object, the present invention provides an air conditioning system for preventing heating and frost formation, comprising a compressor, a four-way valve, an outdoor heat exchanger and an indoor heat exchanger, wherein the four-way valve is respectively connected to a return port of the compressor, an outlet of the compressor, the outdoor heat exchanger and the indoor heat exchanger, the outdoor heat exchanger is connected to the indoor heat exchanger, the air conditioning system further comprises an auxiliary heat exchanger, a first electromagnetic valve and a second electromagnetic valve, wherein two ends of the first electromagnetic valve are respectively connected to the outlet of the compressor and the four-way valve; a first refrigerant flow path and a second refrigerant flow path which can exchange heat are arranged in the auxiliary heat exchanger, one end of the first refrigerant flow path is connected between the first electromagnetic valve and the port a of the four-way valve in a bypass mode, the other end of the first refrigerant flow path is connected to one end of the second electromagnetic valve, and the other end of the second electromagnetic valve is connected between the first electromagnetic valve and the outlet of the compressor; and two ends of the second refrigerant flow path are respectively connected with a d port of the four-way valve and a return air port of the compressor.
Further, a temperature detection unit is arranged at a refrigerant outlet of the outdoor heat exchanger, wherein in a steady operation heating mode, the temperature detection unit dynamically detects the temperature of the refrigerant flowing out of the outdoor heat exchanger, and on/off of the first electromagnetic valve and the second electromagnetic valve is correspondingly controlled based on the detected temperature of the refrigerant and the difference between the temperature of the refrigerant and a preset rated temperature.
Further, in a heating mode of a steady operation, the temperature of the refrigerant detected by the temperature detection unit for the first time is taken as a rated temperature.
Further, in a heating mode of stable operation, the temperature detection unit detects and acquires the temperature of the refrigerant once every interval of a specified time.
Further, when the difference between the refrigerant temperature detected for three consecutive times and the rated temperature is not less than the preset difference and the real-time refrigerant temperature is less than 0 ℃, the first electromagnetic valve is closed and the second electromagnetic valve is opened.
Further, the rated time is 2 min.
Further, the oil separator is further included, wherein an outlet of the compressor is connected with the first electromagnetic valve through the oil separator.
And the air return port of the compressor is connected with the second refrigerant flow path of the auxiliary heat exchanger through the air-liquid separator.
Further, the auxiliary heat exchanger is a plate heat exchanger.
Furthermore, an expansion valve is arranged between the outdoor heat exchanger and the indoor heat exchanger.
The utility model adopts the above technical scheme, its beneficial effect lies in: through switching on/off of the first electromagnetic valve and the second electromagnetic valve, when the frosting state of the outdoor heat exchanger occurs, the low-pressure of a system refrigerant flow path is improved, the refrigerant temperature of the outdoor heat exchanger is gradually increased for defrosting, the attenuation influence of frosting on the system capacity is effectively avoided, meanwhile, the reversing defrosting is not needed, the system can normally heat, and the comfort is good.
Drawings
Fig. 1 is a schematic view of an air conditioning system according to the present invention.
The system comprises a compressor 1, an oil separator 2, a second electromagnetic valve 3, a gas-liquid separator 4, an outdoor heat exchanger 5, an expansion valve 6, an auxiliary heat exchanger 7, an indoor heat exchanger 8, a four-way valve 9, a first electromagnetic valve 10 and a temperature detection unit 11.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided so that this disclosure will be thorough and complete.
Referring to fig. 1, in the present embodiment, an air conditioning system for preventing heating and frost formation includes a compressor 1, a four-way valve 9, an outdoor heat exchanger 5, an indoor heat exchanger 8, an oil separator 2, a gas-liquid separator 4, an expansion valve 6, an auxiliary heat exchanger 7, a first solenoid valve 10, and a second solenoid valve 3, wherein the four-way valve 9 is provided with a, b, c, and d interfaces. The outlet of the compressor 1 is connected with one end of a first electromagnetic valve 10 through an oil separator 2, and the other end of the first electromagnetic valve 10 is connected with an a port of a four-way valve 9; the port c of the four-way valve 9 is connected with one end of the outdoor heat exchanger 5; the other end of the outdoor heat exchanger 5 is connected with one end of an indoor heat exchanger 8 through an expansion valve 6, and the other end of the indoor heat exchanger 8 is connected with b of a four-way valve 9.
In the present embodiment, a first refrigerant flow path and a second refrigerant flow path capable of exchanging heat are provided in the auxiliary heat exchanger 7, one end of the first refrigerant flow path is connected by-pass between the first solenoid valve 10 and the port a of the four-way valve 9, and the other end thereof is connected to one end of the second solenoid valve 3, and the other end of the second solenoid valve 3 is connected by-pass between the first solenoid valve 10 and the outlet of the compressor 1 (that is, the other end of the second solenoid valve 3 is by-passed between the oil separator 2 and the first solenoid valve 10). Both ends of the second refrigerant flow path are connected to a port d of the four-way valve 9 and the gas-liquid separator 4, and the gas-liquid separator 4 is connected to the return port of the compressor 1 (i.e., the return port of the compressor 1 is connected to the second refrigerant flow path of the auxiliary heat exchanger 7 via the gas-liquid separator 4).
In this embodiment, a temperature detection unit 11 is disposed at a refrigerant outlet of the exterior heat exchanger 5, and in the heating mode of the steady operation, the temperature detection unit 11 detects a temperature of the refrigerant flowing out of the exterior heat exchanger 5, and switches on/off of the first solenoid valve 10 and the second solenoid valve 3 accordingly based on the detected temperature of the refrigerant.
Further, after the system starts the heating mode to operate continuously for 30 minutes, the system is determined to enter the heating mode of stable operation, the temperature detection unit 11 is started, the refrigerant temperature detected by the temperature detection unit 11 at the moment is taken as the rated temperature Ta, then the refrigerant temperature is detected and acquired as the real-time temperature Tb every 2 minutes (namely, as the times are monitored and increased, the acquired real-time temperatures Tb are respectively defined as Tb1 and Tb2. Tbn in sequence), the sequentially detected real-time temperatures Tb are sequentially compared with the rated temperature Ta one by one, if the difference between the rated temperature Ta and the real-time temperature Tb detected for three times is not less than the preset difference (namely Ta-Tb is not less than 2 ℃), and the real-time temperature Tb is less than 0 ℃, the outdoor heat exchanger 5 is determined to be in the frosted state, so as to control to close the first electromagnetic valve 10 and open the second electromagnetic valve 3, that is, in the heating mode, the high-temperature and high-pressure refrigerant output from the compressor 1 flows to the second solenoid valve 3 through the oil separator 2, then flows to the first refrigerant flow path of the auxiliary heat exchanger 7, then flows to the port a of the four-way valve 9, and flows out from the port b to the indoor heat exchanger 8 to release heat, the heat-released refrigerant flows to the outdoor heat exchanger 5 through the expansion valve 6 to absorb heat, then flows into the second refrigerant flow path of the auxiliary heat exchanger 7 through the port c and the port d of the four-way valve 9, at this time, the refrigerant in the first refrigerant flow path exchanges heat with the refrigerant in the second refrigerant flow path, the temperature and pressure of the refrigerant in the second refrigerant flow path are increased, and the refrigerant flows back to the compressor 1 through the gas-liquid separator 4, so as to increase the low-pressure of the whole system, and along with the circulation operation of the flow path, the temperature of the refrigerant at the outdoor heat exchanger 5 gradually increases, wherein, tb is larger than or equal to Ta), the outdoor heat exchanger 5 is judged to be in a frostless state, at the moment, the first electromagnetic valve 10 can be opened, the second electromagnetic valve 3 can be closed, and the normal flow circulation of the air conditioning system is recovered.
Further, if the system does not enter the frosting state after continuously operating for 1h, the temperature detection unit 11 detects the temperature of the refrigerant again as a new rated temperature Ta so as to adapt to the change of the external environment, and more accurately performs switching control on the first electromagnetic valve 10 and the second electromagnetic valve 3.
Further, the auxiliary heat exchanger 7 of the present embodiment is a plate heat exchanger.
The above-described embodiments are merely preferred embodiments of the present invention, which are not intended to limit the present invention in any way. Those skilled in the art can make many changes, modifications, and equivalents of the embodiments of the invention without departing from the scope of the invention. Therefore, the content of the technical scheme of the utility model, according to the equivalent change made by the idea of the utility model, should be covered in the protection scope of the utility model.
Claims (10)
1. The utility model provides an air conditioning system who prevents heating frost, includes compressor (1), cross valve (9), outdoor heat exchanger (5) and indoor heat exchanger (8), wherein, cross valve (9) link to each other with the return-air inlet of compressor (1), the export of compressor (1), outdoor heat exchanger (5) and indoor heat exchanger (8) respectively, outdoor heat exchanger (5) and indoor heat exchanger (8) link to each other its characterized in that: the compressor further comprises an auxiliary heat exchanger (7), a first electromagnetic valve (10) and a second electromagnetic valve (3), wherein two ends of the first electromagnetic valve (10) are respectively connected with an outlet of the compressor (1) and the four-way valve (9); a first refrigerant flow path and a second refrigerant flow path which can exchange heat are arranged in the auxiliary heat exchanger (7), one end of the first refrigerant flow path is connected between a first electromagnetic valve (10) and an a port of the four-way valve (9) in a bypassing manner, the other end of the first refrigerant flow path is connected to one end of a second electromagnetic valve (3), and the other end of the second electromagnetic valve (3) is connected between the first electromagnetic valve (10) and an outlet of the compressor (1); and two ends of the second refrigerant flow path are respectively connected with a port d of the four-way valve (9) and a return air port of the compressor (1).
2. An air conditioning system against thermal frost buildup as claimed in claim 1 wherein: and a temperature detection unit (11) is arranged at a refrigerant outlet of the outdoor heat exchanger (5), wherein in a steady operation heating mode, the temperature detection unit (11) dynamically detects the temperature of the refrigerant flowing out of the outdoor heat exchanger (5), and on/off of the first electromagnetic valve (10) and the second electromagnetic valve (3) is correspondingly controlled based on the detected temperature of the refrigerant and the difference between the temperature of the refrigerant and a preset rated temperature.
3. An air conditioning system against thermal frost buildup as claimed in claim 2, wherein: in a heating mode of smooth operation, the refrigerant temperature detected by the temperature detection unit (11) for the first time is taken as a rated temperature.
4. An air conditioning system against thermal frost buildup as claimed in claim 2, wherein: under the heating mode of stable operation, the temperature detection unit (11) detects and acquires the temperature of the refrigerant once at intervals of a set time.
5. An air conditioning system against thermal frost according to claim 4, wherein: and when the difference between the refrigerant temperature detected for three consecutive times and the rated temperature is not less than the preset difference and the real-time refrigerant temperature is less than 0 ℃, closing the first electromagnetic valve (10) and opening the second electromagnetic valve (3).
6. An air conditioning system against thermal frost according to claim 4, wherein: the rated time is 2 min.
7. An air conditioning system against thermal frost buildup as claimed in claim 1 wherein: the oil separator is characterized by further comprising an oil separator (2), wherein an outlet of the compressor (1) is connected with the first electromagnetic valve (10) through the oil separator (2).
8. An air conditioning system against thermal frost buildup as claimed in claim 1 wherein: the air conditioner further comprises a gas-liquid separator (4), wherein a return air port of the compressor (1) is connected with a second refrigerant flow path of the auxiliary heat exchanger (7) through the gas-liquid separator (4).
9. An air conditioning system against thermal frost buildup as claimed in claim 1 wherein: the auxiliary heat exchanger (7) is a plate heat exchanger.
10. An air conditioning system against thermal frost buildup as claimed in claim 1 wherein: an expansion valve (6) is arranged between the outdoor heat exchanger (5) and the indoor heat exchanger (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020381070.7U CN211977168U (en) | 2020-03-24 | 2020-03-24 | Air conditioning system for preventing heating and frost accumulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020381070.7U CN211977168U (en) | 2020-03-24 | 2020-03-24 | Air conditioning system for preventing heating and frost accumulation |
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| CN211977168U true CN211977168U (en) | 2020-11-20 |
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| CN202020381070.7U Active CN211977168U (en) | 2020-03-24 | 2020-03-24 | Air conditioning system for preventing heating and frost accumulation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114734782A (en) * | 2022-04-25 | 2022-07-12 | 杭州绿能新能源汽车部件有限公司 | Control method of thermal management system |
| CN114812024A (en) * | 2022-05-06 | 2022-07-29 | 青岛海信日立空调系统有限公司 | Air conditioner and defrosting method thereof |
| CN114811755A (en) * | 2022-04-01 | 2022-07-29 | 北京小米移动软件有限公司 | Air conditioner, air conditioner control method and device and storage medium |
-
2020
- 2020-03-24 CN CN202020381070.7U patent/CN211977168U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114811755A (en) * | 2022-04-01 | 2022-07-29 | 北京小米移动软件有限公司 | Air conditioner, air conditioner control method and device and storage medium |
| CN114734782A (en) * | 2022-04-25 | 2022-07-12 | 杭州绿能新能源汽车部件有限公司 | Control method of thermal management system |
| CN114812024A (en) * | 2022-05-06 | 2022-07-29 | 青岛海信日立空调系统有限公司 | Air conditioner and defrosting method thereof |
| CN114812024B (en) * | 2022-05-06 | 2023-11-07 | 青岛海信日立空调系统有限公司 | Air conditioner and defrosting method thereof |
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