CN213713302U - Outdoor heat exchange device, air conditioner outdoor unit and air conditioning system - Google Patents
Outdoor heat exchange device, air conditioner outdoor unit and air conditioning system Download PDFInfo
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- CN213713302U CN213713302U CN202022495395.0U CN202022495395U CN213713302U CN 213713302 U CN213713302 U CN 213713302U CN 202022495395 U CN202022495395 U CN 202022495395U CN 213713302 U CN213713302 U CN 213713302U
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Abstract
The utility model discloses an outdoor heat exchange device, an air conditioner outdoor unit and an air conditioning system, wherein, the outdoor heat exchange device comprises an outdoor heat exchanger and a gas-liquid separator; the outdoor heat exchanger comprises a first heat exchanging part and a second heat exchanging part; in the evaporation mode, the gas-liquid separator separates gas-liquid two-phase refrigerant obtained by heat exchange of the first heat exchange part, the separated liquid-phase refrigerant enters the second heat exchange part for heat exchange, and the separated gas-phase refrigerant bypasses to an outlet of the second heat exchange part; in a condensing mode, the gas-liquid separator separates gas-liquid two-phase refrigerant obtained by heat exchange of the second heat exchange part, the separated gas-phase refrigerant enters the first heat exchange part for heat exchange, and the separated liquid-phase refrigerant bypasses to an outlet of the first heat exchange part. The outdoor heat exchange device can realize the side heat exchange enhancement of the refrigerant of the outdoor heat exchanger, and the performance of the air conditioning system is improved.
Description
Technical Field
The utility model relates to an air conditioning technology field, in particular to outdoor heat transfer device, air condensing units and air conditioning system.
Background
In an air conditioning system, an outdoor heat exchanger functions as an evaporator in a heating mode, and functions as a condenser in a cooling mode. In the related art, in the process of refrigeration or heating of the air conditioning system, because the gas-liquid two-phase refrigerant exists in the outdoor heat exchanger, the enhancement of the heat exchange of the refrigerant side of the outdoor heat exchanger is limited, and the improvement of the performance of the air conditioning system is also limited.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an outdoor heat exchange device aims at realizing strengthening the heat transfer of outdoor heat exchanger refrigerant side to promote air conditioning system's performance.
In order to achieve the above object, the present invention provides an outdoor heat exchanger, including:
the outdoor heat exchanger comprises a first heat exchanging part and a second heat exchanging part; and
a gas-liquid separator;
in an evaporation mode, the gas-liquid separator separates gas-liquid two-phase refrigerant obtained by heat exchange of the first heat exchange part, the separated liquid-phase refrigerant enters the second heat exchange part for heat exchange, and the separated gas-phase refrigerant bypasses to an outlet of the second heat exchange part;
in a condensing mode, the gas-liquid separator separates gas-liquid two-phase refrigerant obtained by heat exchange of the second heat exchange part, the separated gas-phase refrigerant enters the first heat exchange part for heat exchange, and the separated liquid-phase refrigerant bypasses to an outlet of the first heat exchange part.
In one embodiment, the outdoor heat exchange device has the evaporation mode and the condensation mode;
the gas-liquid separator is provided with a first opening, a second opening, a third opening and a fourth opening;
in the evaporation mode, the first opening is used for allowing gas-phase refrigerant to flow out, the second opening is used for allowing gas-liquid two-phase refrigerant to flow in, and the third opening is used for allowing liquid-phase refrigerant to flow out;
in the condensing mode, the second opening is used for allowing gas-phase refrigerant to flow out, the third opening is used for allowing gas-liquid two-phase refrigerant to flow in, and the fourth opening is used for allowing liquid-phase refrigerant to flow out.
In an embodiment, the first opening and the second opening are located at one end of the gas-liquid separator closer to the second heat exchanging portion, and the third opening and the fourth opening are located at the other end of the gas-liquid separator.
In an embodiment, the second heat exchanging portion is located above the first heat exchanging portion, the first opening is located on a top plate of the gas-liquid separator, the second opening is located on a side plate of the gas-liquid separator, and the third opening and the fourth opening are located on a bottom plate of the gas-liquid separator.
In one embodiment, the outdoor heat exchange device further comprises a first check valve and/or a second check valve;
in the evaporation mode, the first one-way valve leads the first opening and an outlet of the second heat exchanging part;
in the condensing mode, the second check valve communicates the fourth opening with an outlet of the first heat exchanging portion.
In one embodiment, the outdoor heat exchange device further comprises a first electronic expansion valve and/or a second electronic expansion valve;
in the evaporation mode, the first electronic expansion valve is used for regulating the flow of the gas-phase refrigerant flowing from the first opening to the outlet of the second heat exchanging part;
in the condensing mode, the second electronic expansion valve is configured to regulate a flow rate of the liquid-phase refrigerant flowing from the fourth opening to the outlet of the first heat exchanging part.
In one embodiment, the outdoor heat exchange device further comprises a first temperature sensor, a second temperature sensor and/or a third temperature sensor;
in the evaporation mode, the first temperature sensor is used for acquiring a first temperature of an inlet of the second heat exchanging part, the second temperature sensor is used for acquiring a second temperature of an outlet of the second heat exchanging part, and the first temperature and the second temperature are used for regulating and controlling the opening degree of the first electronic expansion valve;
in the condensing mode, the third temperature sensor is configured to obtain a third temperature at an outlet of the first heat exchanging portion, the first temperature sensor is configured to obtain a fourth temperature at an outlet of the second heat exchanging portion, and the fourth temperature and the third temperature are configured to regulate and control an opening degree of the second electronic expansion valve.
In an embodiment, in an arrangement direction of the first heat exchanging portion and the second heat exchanging portion, a length of the first heat exchanging portion is smaller than a length of the second heat exchanging portion.
In one embodiment, the length of the first heat exchanging part is 1/3-2/3 times the length of the second heat exchanging part.
In one embodiment, the second heat exchanging portion is located above the first heat exchanging portion.
The utility model also provides an air condensing units, including foretell outdoor heat transfer device.
The utility model also provides an air conditioning system, which is characterized in that the air conditioning system comprises a compressor, an indoor heat exchange device and the outdoor heat exchange device;
in the heating mode, the refrigerant flowing out of the compressor flows into the indoor heat exchange device, flows into the first heat exchange part after exchanging heat with the indoor heat exchange device, and flows into the compressor from the second heat exchange part;
in the cooling mode, the refrigerant flowing out of the compressor flows into the second heat exchanging portion, and the refrigerant flowing out of the first heat exchanging portion exchanges heat with the indoor heat exchanging device and then flows into the compressor.
In the above outdoor heat exchanger, the outdoor heat exchanger includes a first heat exchanging portion and a second heat exchanging portion, and a gas-liquid separator is provided between the first heat exchanging portion and the second heat exchanging portion.
Therefore, in the evaporation mode, the gas-liquid separator separates gas-liquid two-phase refrigerant obtained by heat exchange of the first heat exchange part, the separated liquid-phase refrigerant enters the second heat exchange part for heat exchange, and the separated gas-phase refrigerant bypasses to the outlet of the second heat exchange part, so that the area of a mist flow (heat transfer deterioration) area in the outdoor heat exchanger can be reduced, the evaporation heat transfer coefficient in the outdoor heat exchanger is improved, and the side pressure drop of the refrigerant is reduced. That is, the outdoor heat exchange device realizes the side heat exchange enhancement of the refrigerant in the evaporation mode.
Therefore, in the condensing mode, the gas-liquid separator separates gas-liquid two-phase refrigerant obtained by heat exchange of the second heat exchange part, the separated gas-phase refrigerant enters the first heat exchange part for heat exchange, and the separated liquid-phase refrigerant bypasses to the outlet of the first heat exchange part, so that the contact area of the gas-phase refrigerant and the inner wall of the pipe can be increased, the condensing heat transfer is enhanced, the condensing heat transfer coefficient in the outdoor heat exchanger is improved, and the side pressure drop of the refrigerant is reduced. That is, the outdoor heat exchange device realizes the side heat exchange enhancement of the refrigerant in the condensing mode.
The outdoor heat exchange device has the evaporation mode and the condensation mode, so that the outdoor heat exchange device can improve the evaporation heat transfer coefficient in the outdoor heat exchanger and reduce the pressure drop of the refrigerant side, and can also improve the condensation heat transfer coefficient in the outdoor heat exchanger and reduce the pressure drop of the refrigerant side. The outdoor heat exchange device realizes the side heat exchange enhancement of the refrigerant under two working modes of evaporation and condensation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural view of an outdoor heat exchange device according to an embodiment of the present invention in an evaporation mode;
FIG. 2 is a schematic structural diagram of the outdoor heat exchange device shown in FIG. 1 in a condensing mode;
fig. 3 is a schematic flow chart illustrating a method for regulating and controlling a first electronic expansion valve and a second electronic expansion valve of an outdoor heat exchange device according to an embodiment of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | Outdoor heat exchanger | 01 | |
| 012 | First |
014 | Second |
| 02 | |
03 | |
| 04 | Gas- |
05 | First |
| 06 | Second electronic expansion valve | T1 | First temperature sensor |
| T2 | Second temperature sensor | T3 | |
| 04a | |
04b | |
| 04c | |
04d | The fourth opening |
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture, and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if appearing throughout the text, "and/or" is meant to include three juxtaposed aspects, taking "A and/or B" as an example, including either the A aspect, or the B aspect, or both A and B satisfied aspects. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides an outdoor heat exchange device.
In the embodiment of the present invention, as shown in fig. 1 and 2, the outdoor heat exchanging device 100 includes an outdoor heat exchanger 01 and a gas-liquid separator 04. The outdoor heat exchanger 01 includes a first heat exchanging part 012 and a second heat exchanging part 014.
In the evaporation mode, as shown in fig. 1, the gas-liquid separator 04 separates the gas-liquid two-phase refrigerant obtained by heat exchange in the first heat exchanging unit 012, the separated liquid-phase refrigerant enters the second heat exchanging unit 014 to exchange heat, and the separated gas-phase refrigerant bypasses the outlet 01d of the second heat exchanging unit 014.
In the embodiment shown in fig. 1, (1) a refrigerant (a refrigerant to be evaporated) enters the first heat exchanging portion 012 through the inlet 01a of the first heat exchanging portion 012, and the refrigerant exchanges heat with the first heat exchanging portion 012 at the first heat exchanging portion 012 to obtain a gas-liquid two-phase refrigerant (i.e., the liquid-phase refrigerant is partially evaporated and partially not evaporated at the first heat exchanging portion 012); (2) the gas-liquid two-phase refrigerant flows out of the first heat exchanging portion 012 through the outlet 01b of the first heat exchanging portion 012 and flows into the gas-liquid separator 04 through the second opening 04b of the gas-liquid separator 04; (3) the gas-liquid separator 04 performs gas-liquid separation on the gas-liquid two-phase refrigerant to obtain a liquid-phase refrigerant and a gas-phase refrigerant; (4) the separated liquid-phase refrigerant flows out of the gas-liquid separator 04 through the third opening 04c of the gas-liquid separator 04, flows into the second heat exchanging unit 014 through the inlet 01c of the second heat exchanging unit 014, exchanges heat with the second heat exchanging unit 014, and then flows out of the second heat exchanging unit 014 through the outlet 01d of the second heat exchanging unit 014; (5) the separated gas-phase refrigerant flows out of the first opening 04a of the gas-liquid separator 04, and bypasses the outlet 01d of the second heat exchanging portion 014 (in this case, the second heat exchanging portion 014 is bypassed). That is, the separated gas-phase refrigerant is mixed with the separated liquid-phase refrigerant after heat exchange in the second heat exchanging unit 014 (ideally, the separated liquid-phase refrigerant is completely changed to a gas-phase refrigerant after heat exchange in the second heat exchanging unit 014) at the outlet 01d of the second heat exchanging unit 014.
In the evaporation mode, the first opening 04a is used for flowing out of gas-phase refrigerant, the second opening 04b is used for flowing in of gas-liquid two-phase refrigerant, and the third opening 04c is used for flowing out of liquid-phase refrigerant.
In the related technology, when the outdoor heat exchanger works in an evaporation mode, along with the progress of an evaporation process, a gas-liquid two-phase refrigerant exists in an outdoor heat exchanger tube, so that the dryness in the outdoor heat exchanger tube is increased, a mist flow area appears, and the evaporation heat transfer coefficient is sharply reduced; the increased quality increases the flow rate of the refrigerant in the tubes, resulting in an increased refrigerant side pressure drop.
In the outdoor heat exchange apparatus 100, the outdoor heat exchanger 01 includes the first heat exchange unit 012 and the second heat exchange unit 014, and the gas-liquid separator 04 is disposed between the first heat exchange unit 012 and the second heat exchange unit 014, and in the evaporation mode, the gas-liquid separator 04 separates the gas-liquid two-phase refrigerant obtained by heat exchange in the first heat exchange unit 012, the separated liquid-phase refrigerant enters the second heat exchange unit 014 to exchange heat, and the separated gas-phase refrigerant bypasses to the outlet 01d of the second heat exchange unit 014, so that the area of the mist flow (heat transfer deterioration) region inside the outdoor heat exchanger 01 can be reduced, the evaporation heat transfer coefficient inside the outdoor heat exchanger 01 can be increased, and the refrigerant-side pressure drop can be reduced. That is, the outdoor heat exchanging apparatus 100 described above realizes the enhancement of the heat exchange at the refrigerant side in the evaporation mode.
In the condensation mode, as shown in fig. 2, the gas-liquid separator 04 separates the gas-liquid two-phase refrigerant obtained by the heat exchange in the second heat exchange portion 014, the separated gas-phase refrigerant enters the first heat exchange portion 012 to exchange heat, and the separated liquid-phase refrigerant bypasses the outlet 01a of the first heat exchange portion 012.
In the embodiment shown in fig. 2, (1) the refrigerant (refrigerant to be condensed) enters the second heat exchanging portion 014 from the inlet 01d of the second heat exchanging portion 014, and the refrigerant exchanges heat with the second heat exchanging portion 014 at the second heat exchanging portion 014 to obtain a gas-liquid two-phase refrigerant (that is, the liquid-phase refrigerant is partially condensed at the second heat exchanging portion 014 and partially uncondensed); (2) the gas-liquid two-phase refrigerant flows out of the second heat exchanging portion 014 from the outlet 01c of the second heat exchanging portion 014 and flows into the gas-liquid separator 04 from the third opening 04c of the gas-liquid separator 04; (3) the gas-liquid separator 04 performs gas-liquid separation on the gas-liquid two-phase refrigerant to obtain a liquid-phase refrigerant and a gas-phase refrigerant; (4) the separated gas-phase refrigerant flows out of the gas-liquid separator 04 through the second four openings 04b of the gas-liquid separator 04, flows into the first heat exchanging part 012 through the inlet 01b of the first heat exchanging part 012, exchanges heat with the first heat exchanging part 012, and flows out of the first heat exchanging part 012 through the outlet 01a of the first heat exchanging part 012; (5) the separated liquid-phase refrigerant flows out of the fourth opening 04d of the gas-liquid separator 04, and bypasses the outlet 01a of the first heat exchanging portion 012 (at this time, the second heat exchanging portion 014 is bypassed). That is, the separated liquid-phase refrigerant is mixed with the separated gas-phase refrigerant that has exchanged heat in the first heat exchanging unit 012 at the outlet 01a of the first heat exchanging unit 012 (ideally, the separated gas-phase refrigerant exchanges heat with the first heat exchanging unit 012 and is completely changed into a liquid-phase refrigerant).
In the condensation mode, the second opening 04b is used for flowing out of the gas-phase refrigerant, the third opening 04c is used for flowing in of the gas-liquid two-phase refrigerant, and the fourth opening 04d is used for flowing out of the liquid-phase refrigerant.
In the related art, when the outdoor heat exchanger operates in a condensing mode, as a condensing process progresses, a gas-liquid two-phase refrigerant exists in the outdoor heat exchanger tube, and the liquid-phase refrigerant in the outdoor heat exchanger tube accumulates to prevent the gas-phase refrigerant from directly contacting with the inner wall of the tube, so that the condensing heat transfer coefficient is deteriorated, and the flow resistance loss of the refrigerant in the tube is increased.
In the outdoor heat exchange device 100, the outdoor heat exchanger 01 includes the first heat exchange portion 012 and the second heat exchange portion 014, and the gas-liquid separator 04 is disposed between the first heat exchange portion 012 and the second heat exchange portion 014, and in the condensing mode, the gas-liquid separator 04 separates the gas-liquid two-phase refrigerant obtained by heat exchange in the second heat exchange portion 014, the separated gas-phase refrigerant enters the first heat exchange portion 012 to exchange heat, and the separated liquid-phase refrigerant bypasses to the outlet 01a of the first heat exchange portion 012, so that the contact area between the gas-phase refrigerant and the inner wall of the tube can be increased, the heat transfer by condensation can be enhanced, the heat transfer coefficient by condensation inside the outdoor heat exchanger 01 can be increased, and the pressure drop on the refrigerant side can be reduced. That is, the outdoor heat exchanging device 100 realizes the enhancement of the heat exchange on the refrigerant side in the condensing mode.
In this embodiment, the outdoor heat exchanging device 100 can operate in both the evaporation mode and the condensation mode, that is, the outdoor heat exchanging device 100 has the evaporation mode and the condensation mode. At this time, the outdoor heat exchanger 100 may increase the evaporation heat transfer coefficient and decrease the refrigerant-side pressure drop in the outdoor heat exchanger 01, and may increase the condensation heat transfer coefficient and decrease the refrigerant-side pressure drop in the outdoor heat exchanger 01. That is, the outdoor heat exchange apparatus 100 realizes the enhancement of the side heat exchange of the refrigerant in the two operation modes of evaporation and condensation. At this time, the outdoor heat exchanging apparatus 100 may be applied to an air conditioning system that can perform both heating and cooling. When the air conditioning system heats, the outdoor heat exchanger 100 operates in the evaporation mode; when the air conditioning system is cooling, the outdoor heat exchanger 100 operates in the condensing mode.
It is understood that, in other embodiments, the outdoor heat exchanger 100 may only operate in the evaporation mode, and in this case, the gas-liquid separator 04 may only include three openings, namely, the first opening 04a, the second opening 04b and the third opening 04c (the gas-liquid separator 04 may include four or more openings, and three of the openings are selected to convey the refrigerant in each state during operation). In this case, the outdoor heat exchanger 100 may be applied to a single-heating air conditioning system.
It is understood that, in other embodiments, the outdoor heat exchanger 100 may only operate in the condensing mode, and in this case, the gas-liquid separator 04 may only include three openings, i.e., the second opening 04b, the third opening 04c and the fourth opening 04d (the gas-liquid separator 04 may include four or more openings, and in operation, three of the openings are selected to convey the refrigerant in each state). At this time, the outdoor heat exchanger 100 may be applied to a single-cooling air conditioning system.
In the present embodiment, the gas-liquid separator 04 has four openings, i.e., a first opening 04a, a second opening 04b, a third opening 04c, and a fourth opening 04 d.
The four openings not only enable the outdoor heat exchanger 100 to have the evaporation mode and the condensation mode, but also avoid the gas-liquid separator 04 from having too many openings, which results in too high cost of the gas-liquid separator 04.
In addition, in the evaporation mode, the refrigerant (refrigerant to be evaporated) enters the first heat exchanging part 012 (first pipe) from the inlet 01a of the first heat exchanging part 012, and the fourth opening 04d is blocked, so that the liquid-phase refrigerant in the gas-liquid separator 04 is prevented from passing through the fourth opening 04d and the inlet 01a of the first heat exchanging part 012 in order to enter the first heat exchanging part 012 (second pipe), and an additional blocking member for blocking the fourth opening 04d is not required (the fourth opening 04d can be blocked because the pressure of the first pipe is greater than the pressure of the second pipe).
Similarly, in the condensation mode, the refrigerant (refrigerant to be condensed) enters the second heat exchange portion 014 from the inlet 01d of the second heat exchange portion 014, and the first opening 04a can be blocked, so that the gas-phase refrigerant in the gas-liquid separator 04 can be prevented from passing through the first opening 04a and the inlet 01d of the second heat exchange portion 014 in this order and entering the second heat exchange portion 014, and an additional blocking member for blocking the first opening 04a does not need to be provided.
It is understood that in other embodiments, the gas-liquid separator 04 may include five or more openings, and three of the openings may be selected to convey the refrigerant in each state when operating in the evaporation mode or the condensation mode.
In this embodiment, the first opening 04a and the second opening 04b are located at one end of the gas-liquid separator 04 closer to the second heat exchanging portion 014, and the third opening 04c and the fourth opening 04d are located at the other end of the gas-liquid separator 04. As such, in the evaporation mode, the first opening 04a is more facilitated to discharge the gas-phase refrigerant.
In this embodiment, the second heat exchanging part 014 is located above the first heat exchanging part 012, and accordingly, the first and second openings 04a and 04b are located at the upper end of the gas-liquid separator 04, and the third and fourth openings 04c and 04d are located at the lower end of the gas-liquid separator 04. Thus, the first opening 04a can preferably discharge the gas-phase refrigerant, the second opening 04b can preferably discharge the gas-phase refrigerant and discharge the gas-liquid two-phase refrigerant, the third opening 04c can preferably discharge the liquid-phase refrigerant and discharge the gas-liquid two-phase refrigerant, and the fourth opening 04d can preferably discharge the liquid-phase refrigerant.
In the present embodiment, the first opening 04a is located on the top plate of the gas-liquid separator 04, and the second opening 04b is located on the side plate of the gas-liquid separator 04, that is, the first opening 04a is located above the second opening 04 b. The third opening 04c and the fourth opening 04d are located in the bottom plate of the gas-liquid separator 04.
In the present embodiment, the length of the first heat exchanging part 012 is smaller than the length of the second heat exchanging part 014 in the arrangement direction of the first heat exchanging part 012 and the second heat exchanging part 014. Thus, the evaporation and condensation of the outdoor heat exchange device 100 are facilitated. In this embodiment, the length of the first heat exchanging part 012 is 1/3 to 2/3 times the length of the second heat exchanging part 014. In the present embodiment, the length of the first heat exchanging portion 012 is 1/2 times the length of the second heat exchanging portion 014.
In the present embodiment, the second heat exchanging portion 014 is located above the first heat exchanging portion 012. Thus, the evaporation and condensation of the outdoor heat exchange device 100 are facilitated.
In this embodiment, the outdoor heat exchanging apparatus 100 further includes a first check valve 02 and/or a second check valve 03. In the evaporation mode, the first check valve 02 leads the first opening 04a of the gas-liquid separator 04 and the outlet 01d of the second heat exchanging portion 014. In the condensation mode, the second check valve 03 leads the fourth opening 04d of the gas-liquid separator 04 and the outlet 01a of the first heat exchanging part 012. In this way, in the evaporation mode, when the refrigerant (refrigerant to be evaporated) enters the first heat exchanging part 012 through the inlet 01a of the first heat exchanging part 012, the second check valve 03 can prevent the refrigerant to be evaporated from entering the gas-liquid separator 04 through the fourth opening 04d without passing through the first heat exchanging part 012. In the cooling mode, when the refrigerant (refrigerant to be condensed) enters the second heat exchanging portion 014 from the inlet 01d of the second heat exchanging portion 014, the first check valve 02 may prevent the refrigerant to be condensed from entering the gas-liquid separator 04 through the first opening 04a without passing through the second heat exchanging portion 014.
It is to be understood that, in other embodiments, when the fourth opening 04d is movably connected to the first heat exchanging part 012 and the first opening 04a is movably connected to the second heat exchanging part 014, the first check valve 02 and the second check valve 03 may be omitted. At this time, in the evaporation mode, the first movable tube is connected to the first opening 04a and the second heat exchanging part 014, and the second movable tube connecting the fourth opening 04d and the first heat exchanging part 012 is separated from the first heat exchanging part 012, whereas in the condensation mode, the second movable tube is connected to the fourth opening 04d and the first heat exchanging part 012, and the first movable tube connecting the first opening 04a and the second heat exchanging part 014 is separated from the second heat exchanging part 014.
It is understood that in other embodiments, when the outdoor heat exchanging device 100 can only operate in the evaporation or condensation mode, the first check valve 02 and the second check valve 03 can be omitted.
In this embodiment, the outdoor heat exchange apparatus 100 further includes a first electronic expansion valve (electronic expansion valve one) 05 and/or a second electronic expansion valve (electronic expansion valve two) 06.
In the evaporation mode, the first electronic expansion valve 05 is used to adjust the flow rate of the gas-phase refrigerant flowing from the first opening 04a to the outlet 01d of the second heat exchanging part 014. In this way, by controlling the opening degree of the first electronic expansion valve 05, the flow rate of the gas-phase refrigerant flowing from the first opening 04a to the outlet 01d of the second heat exchanging portion 014 can be adjusted, so that the entrainment of the refrigerant discharged from the outlet 01d of the second heat exchanging portion 014 in the evaporation mode can be avoided, and the outdoor heat exchanging apparatus 100 can be ensured to be always in a highly efficient and stable operating state.
In the condensation mode, the second electronic expansion valve 06 is used to adjust the flow rate of the liquid-phase refrigerant flowing from the fourth opening 04d to the outlet 01a of the first heat exchanging part 012. In this way, the flow rate of the liquid-phase refrigerant flowing from the fourth opening 04d to the outlet 01a of the first heat exchanging part 012 can be adjusted by controlling the opening degree of the second electronic expansion valve 06, so that the refrigerant discharged from the outlet 01a of the first heat exchanging part 012 in the condensing mode can be prevented from being entrained with air, and the outdoor heat exchanging apparatus 100 can be ensured to be always in a highly efficient and stable operation state.
In the present embodiment, the outdoor heat exchanging apparatus 100 further includes a first temperature sensor T1, a second temperature sensor T2, and/or a third temperature sensor T3.
In the evaporation mode, the first temperature sensor T1 is used to acquire a first temperature of the inlet 01c of the second heat exchanging part 014, and the second temperature sensor T2 is used to acquire a second temperature of the outlet 01d of the second heat exchanging part 014. The first temperature and the second temperature are used for regulating the opening degree of the first electronic expansion valve 05.
In the condensation mode, the third temperature sensor T3 is used to acquire a third temperature of the outlet 01a of the first heat exchanging part 012, and the first temperature sensor T1 is used to acquire a fourth temperature of the outlet 01c of the second heat exchanging part 014. The fourth temperature and the third temperature are used for regulating the opening degree of the second electronic expansion valve 06.
In this embodiment, the opening degrees of the first electronic expansion valve 05 and the second electronic expansion valve 06 are conveniently controlled by the temperatures at different positions. It is understood that, in other embodiments, the opening degrees of the first electronic expansion valve 05 and the second electronic expansion valve 06 may be controlled by other parameters (for example, the refrigerant flow rates at different positions).
In the following with n1Denotes the opening degree of the first electronic expansion valve 05 by n2Indicates the opening degree of the second electronic expansion valve 06; the temperature value measured by the first temperature sensor T1 is denoted by K1, the temperature value measured by the second temperature sensor T2 is denoted by K2, the temperature value measured by the third temperature sensor T3 is denoted by K3, and the control method of the first electronic expansion valve 05 and the second electronic expansion valve 06 is expressed as follows:
as shown in fig. 3, operating in evaporation mode:
I. in the starting-up stage, the opening degree n of the first electronic expansion valve 05 is adjusted1Adjusting to the minimum;
II. Judging the stability of the system, if the fluctuation amplitude of the temperature value K1 measured by the first temperature sensor T1 in the time interval delta T is within delta K, judging that the system enters a stable operation stage, and performing the step III, otherwise, continuously judging the stability of the system;
III opening degree n of the first electronic expansion valve 051Adjusted to an initial set opening n0,1；
IV, dynamic regulation process, opening degree n of the first electronic expansion valve 051The adjustment is carried out according to the superheat degree K2-K1 at the outlet 01d in the evaporation mode of the outdoor heat exchanger 100; by Δ Kevap.minRepresents a set minimum value of the degree of superheat at the outlet 01d in the evaporation mode of the outdoor heat exchanger 100, in Δ Kevap.maxIndicating the degree of superheat at the outlet 01d in the evaporation mode of the outdoor heat exchanger 100A set maximum value of (d); when K2-K1<ΔKevap.minWhen n is decreased1When K2-K1>ΔKevap.maxWhile increasing n1(ii) a Adjustment amplitude of Δ n1Adjusting the settling time interval to Deltat1(ii) a Dynamic monitoring and adjusting are still carried out after the superheat degree condition is met;
as shown in fig. 3, operating in condensing mode:
I. in the starting-up stage, the opening degree n of the second electronic expansion valve 061Adjusting to the minimum;
II. Judging the stability of the system, if the fluctuation amplitude of the temperature value K1 measured by the first temperature sensor T1 in the time interval delta T is within delta K, judging that the system enters a stable operation stage, and performing the step III, otherwise, continuously judging the stability of the system;
III opening degree n of second electronic expansion valve 062Adjusted to an initial set opening n0,2；
IV, dynamic regulation Process, opening degree n of the second electronic expansion valve 062The degree of supercooling at the outlet 01a of the outdoor heat exchanger 100 in the condensing mode is adjusted according to K1-K3; by Δ Kcond.minRepresents a set minimum value of the supercooling degree at the outlet 01a in the condensing mode of the outdoor heat exchanger 100, and is expressed by delta Kcond.maxA set maximum value indicating a supercooling degree at the outlet 01a in the condensing mode of the outdoor heat exchanger 100; when K1-K3<ΔKcond.minWhen n is decreased2When K1-K3>ΔKcond.maxWhile increasing n2(ii) a Adjustment amplitude of Δ n2Adjusting the settling time interval to Deltat2(ii) a Dynamic monitoring and adjusting are carried out after the condition of supercooling degree is met;
in the method for controlling the first electronic expansion valve 05 and the second electronic expansion valve 06, Δ t, Δ K, n0,1，n0,2，ΔKevap.min，ΔKevap.max，ΔKcond.min，ΔKcond.max，Δn1，Δn2，Δt1，Δt2And the setting parameters are determined according to the actual system configuration.
The utility model also provides an air condensing units, this air condensing units include foretell outdoor heat transfer device 100.
The utility model also provides an air conditioning system, this air conditioning system include compressor, indoor heat transfer device and the outdoor heat transfer device of above-mentioned.
In the heating mode, the refrigerant flowing out of the compressor flows into the indoor heat exchange device, exchanges heat with the indoor heat exchange device, flows into the first heat exchange portion, and the refrigerant flowing out of the second heat exchange portion flows into the compressor. At this time, the outdoor heat exchange device operates in an evaporation mode.
In the cooling mode, the refrigerant flowing out of the compressor flows into the second heat exchanging portion, and the refrigerant flowing out of the first heat exchanging portion exchanges heat with the indoor heat exchanging device and then flows into the compressor. At this time, the outdoor heat exchange device operates in a condensing mode.
The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.
Claims (12)
1. An outdoor heat exchange apparatus, comprising:
the outdoor heat exchanger comprises a first heat exchanging part and a second heat exchanging part; and
a gas-liquid separator;
in an evaporation mode, the gas-liquid separator separates gas-liquid two-phase refrigerant obtained by heat exchange of the first heat exchange part, the separated liquid-phase refrigerant enters the second heat exchange part for heat exchange, and the separated gas-phase refrigerant bypasses to an outlet of the second heat exchange part;
in a condensing mode, the gas-liquid separator separates gas-liquid two-phase refrigerant obtained by heat exchange of the second heat exchange part, the separated gas-phase refrigerant enters the first heat exchange part for heat exchange, and the separated liquid-phase refrigerant bypasses to an outlet of the first heat exchange part.
2. The outdoor heat exchange unit of claim 1, wherein the gas-liquid separator has a first opening, a second opening, a third opening, and a fourth opening;
in the evaporation mode, the first opening is used for allowing gas-phase refrigerant to flow out, the second opening is used for allowing gas-liquid two-phase refrigerant to flow in, and the third opening is used for allowing liquid-phase refrigerant to flow out;
in the condensing mode, the second opening is used for allowing gas-phase refrigerant to flow out, the third opening is used for allowing gas-liquid two-phase refrigerant to flow in, and the fourth opening is used for allowing liquid-phase refrigerant to flow out.
3. The outdoor heat exchange device according to claim 2, wherein the first opening and the second opening are located at one end of the gas-liquid separator closer to the second heat exchange portion, and the third opening and the fourth opening are located at the other end of the gas-liquid separator.
4. The outdoor heat exchange device according to claim 3, wherein the second heat exchange portion is located above the first heat exchange portion, the first opening is located at a top plate of the gas-liquid separator, the second opening is located at a side plate of the gas-liquid separator, and the third opening and the fourth opening are located at a bottom plate of the gas-liquid separator.
5. The outdoor heat exchange apparatus of claim 2 further comprising a first one-way valve and/or a second one-way valve;
in the evaporation mode, the first one-way valve leads the first opening and an outlet of the second heat exchanging part;
in the condensing mode, the second check valve communicates the fourth opening with an outlet of the first heat exchanging portion.
6. The outdoor heat exchange apparatus of claim 2, further comprising a first electronic expansion valve and/or a second electronic expansion valve;
in the evaporation mode, the first electronic expansion valve is used for regulating the flow of the gas-phase refrigerant flowing from the first opening to the outlet of the second heat exchanging part;
in the condensing mode, the second electronic expansion valve is configured to regulate a flow rate of the liquid-phase refrigerant flowing from the fourth opening to the outlet of the first heat exchanging part.
7. The outdoor heat exchange apparatus of claim 6 further comprising a first temperature sensor, a second temperature sensor, and/or a third temperature sensor;
in the evaporation mode, the first temperature sensor is used for acquiring a first temperature of an inlet of the second heat exchanging part, the second temperature sensor is used for acquiring a second temperature of an outlet of the second heat exchanging part, and the first temperature and the second temperature are used for regulating and controlling the opening degree of the first electronic expansion valve;
in the condensing mode, the third temperature sensor is configured to obtain a third temperature at an outlet of the first heat exchanging portion, the first temperature sensor is configured to obtain a fourth temperature at an outlet of the second heat exchanging portion, and the fourth temperature and the third temperature are configured to regulate and control an opening degree of the second electronic expansion valve.
8. The outdoor heat exchange device according to any one of claims 1 to 7, wherein the length of the first heat exchange portion is smaller than the length of the second heat exchange portion in the arrangement direction of the first heat exchange portion and the second heat exchange portion.
9. The outdoor heat exchanging apparatus as claimed in claim 8, wherein the length of the first heat exchanging part is 1/3-2/3 times the length of the second heat exchanging part.
10. The outdoor heat exchange device according to claim 1, wherein the second heat exchange portion is positioned above the first heat exchange portion.
11. An outdoor unit of an air conditioner, comprising the outdoor heat exchanging apparatus of any one of claims 1 to 10.
12. An air conditioning system comprising a compressor, an indoor heat exchange device and an outdoor heat exchange device according to any one of claims 1 to 10;
in the heating mode, the refrigerant flowing out of the compressor flows into the indoor heat exchange device, flows into the first heat exchange part after exchanging heat with the indoor heat exchange device, and flows into the compressor from the second heat exchange part;
in the cooling mode, the refrigerant flowing out of the compressor flows into the second heat exchanging portion, and the refrigerant flowing out of the first heat exchanging portion exchanges heat with the indoor heat exchanging device and then flows into the compressor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022495395.0U CN213713302U (en) | 2020-11-02 | 2020-11-02 | Outdoor heat exchange device, air conditioner outdoor unit and air conditioning system |
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| CN202022495395.0U CN213713302U (en) | 2020-11-02 | 2020-11-02 | Outdoor heat exchange device, air conditioner outdoor unit and air conditioning system |
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| CN213713302U true CN213713302U (en) | 2021-07-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023206885A1 (en) * | 2022-04-29 | 2023-11-02 | 广东美的制冷设备有限公司 | Heat exchanger, flow path control method for heat exchanger, readable storage medium, and air conditioner |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023206885A1 (en) * | 2022-04-29 | 2023-11-02 | 广东美的制冷设备有限公司 | Heat exchanger, flow path control method for heat exchanger, readable storage medium, and air conditioner |
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