CN113932323A - Outdoor unit of air conditioner - Google Patents
Outdoor unit of air conditioner Download PDFInfo
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- CN113932323A CN113932323A CN202010603443.5A CN202010603443A CN113932323A CN 113932323 A CN113932323 A CN 113932323A CN 202010603443 A CN202010603443 A CN 202010603443A CN 113932323 A CN113932323 A CN 113932323A
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- Prior art keywords
- heat exchange
- valve
- exchange part
- variable flow
- bidirectional variable
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/26—Refrigerant piping
- F24F1/32—Refrigerant piping for connecting the separate outdoor units to indoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/14—Heat exchangers specially adapted for separate outdoor units
- F24F1/16—Arrangement or mounting thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention discloses an air conditioner outdoor unit, which comprises a bidirectional variable flow pipeline, wherein an outdoor heat exchanger comprises an upper heat exchange part and a lower heat exchange part; the bidirectional variable flow pipeline comprises a throttling element and a first one-way valve which are connected in parallel; in the heating mode, the refrigerant enters the lower heat exchange part from the throttling element to exchange heat, the throttling element reduces the flow of the refrigerant flowing through the lower heat exchange part, and the heat exchange efficiency of the lower heat exchange part is improved; during defrosting, the refrigerant flowing through the lower heat exchange part does not pass through the throttling element, so that the refrigerant flow of the lower heat exchange part is improved, the defrosting speed of the lower heat exchange part is improved, and the defrosting time of the lower heat exchange part is shortened; through the flow path design of the bidirectional variable flow pipeline, the refrigerant quantity at different positions of the outdoor heat exchanger is in the optimal state in the heating and defrosting modes, the overall heat exchange efficiency is improved, the overall defrosting time is shortened, and the technical problem that the optimal flow path design of the heating mode and the defrosting mode of the conventional outdoor air conditioner can not be achieved simultaneously is solved.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioner outdoor unit.
Background
In the operation process of the top air outlet outdoor unit, the air volume at different positions of the heat exchanger is different, especially in the vertical direction, and the air volume is gradually reduced along with the reduction of the height, as shown in fig. 1.
In order to optimize the capacity of the heat exchanger, it is necessary to increase the refrigerant flow rate at a position where the air volume is large and to decrease the refrigerant flow rate at a position where the air volume is small. A flow dividing head is generally used for connecting a plurality of capillary tubes for adjusting the refrigerant flow in the industry, the capillary tubes matched with a flow path with large refrigerant flow are short in length or large in pipe diameter, and the capillary tubes matched with a flow path with small refrigerant flow are long in length or small in pipe diameter. Therefore, the upper flow path with large air volume of the heat exchanger adopts short capillaries or capillaries with large diameters, and the lower flow path with small air volume adopts long capillaries or capillaries with small diameters.
Because the air quantity is not uniformly distributed, the frosting quantities of different positions of the heat exchanger are different, the lower part with small air quantity is frosted firstly, the frost quantity is large before defrosting, the upper part with large air quantity is frosted later, and the frost quantity is relatively small. When entering the defrosting mode, the same piping as that in heating is used, so that the upper flow path has a large amount of refrigerant but a small amount of frost and a high defrosting speed, and the lower flow path has a small amount of refrigerant but a large amount of frost and a low defrosting speed. Therefore, the condition that the upper part is defrosted in the defrosting process of the lower part is caused, so that the defrosting time is too long, and the user experience is influenced; meanwhile, after the upper defrosting is finished, a refrigerant continues to flow through the upper flow path, and the residual water outside the heating pipe is melted, so that heat is wasted, as shown in fig. 2.
Disclosure of Invention
The invention aims to provide an air conditioner outdoor unit, which solves the technical problem that the flow path design of the heating mode and the defrosting mode of the existing air conditioner outdoor unit cannot be optimized simultaneously.
In order to solve the technical problems, the invention adopts the following technical scheme:
an outdoor unit of an air conditioner is provided, including:
the gas pipe (16) and the liquid pipe (17) are connected with the indoor unit of the air conditioner;
a compressor (1) and an oil separator (2) connected in series;
an outdoor heat exchanger comprising an upper heat exchange portion (5) and a lower heat exchange portion (6);
the first end of the four-way reversing valve (3) is connected with the gas pipe (16), the second end of the four-way reversing valve is connected with the oil separator (2), the third end of the four-way reversing valve is connected with the outdoor heat exchanger through a C pipeline (4), and the fourth end of the four-way reversing valve is connected with the compressor (1);
further comprising:
the bidirectional variable flow pipeline comprises a throttling element (12) and a first one-way valve (13) which are connected in parallel; the upper heat exchange part (5) is connected with the first end of the bidirectional variable flow pipeline through a first flow dividing head (9); the lower heat exchange part (6) is connected with the second end of the bidirectional variable flow pipeline through a second flow dividing head (10); the second end of the bidirectional variable flow pipeline is connected with the second end of the four-way reversing valve (3) through an SVD (singular value decomposition) pipe (18); a first electromagnetic valve (15) is arranged on the SVD pipe (18); the first end of the bidirectional variable flow pipeline is connected with a liquid pipe (17) through an electronic expansion valve (11); wherein the first one-way valve (13) defines a passage for the bidirectional variable flow line from the second end to the first end;
the second electromagnetic valve (7) is connected to a communicating pipeline between the first flow dividing head (9) and the lower heat exchange part (6);
a second check valve (8) connected to a communication pipe between the upper heat exchange part (5) and the lower heat exchange part (6) to define a passage from the lower heat exchange part (6) to the upper heat exchange part (5);
the control part is used for controlling the first electromagnetic valve (15) and the second electromagnetic valve (7) to be closed in the heating mode; and in the defrosting mode, the state of the four-way reversing valve (3) in the heating mode is controlled to be maintained, and the first electromagnetic valve (15) is controlled to be opened, the second electromagnetic valve (7) is controlled to be closed, and the electronic expansion valve (11) is controlled to be closed.
An outdoor unit of an air conditioner is provided, including:
the gas pipe (16) and the liquid pipe (17) are connected with the indoor unit of the air conditioner;
a compressor (1) and an oil separator (2) connected in series;
an outdoor heat exchanger comprising an upper heat exchange portion (5) and a lower heat exchange portion (6);
the first end of the four-way reversing valve (3) is connected with the gas pipe (16), the second end of the four-way reversing valve is connected with the oil separator (2), the third end of the four-way reversing valve is connected with the outdoor heat exchanger through a C pipeline (4), and the fourth end of the four-way reversing valve is connected with the compressor (1);
further comprising:
the bidirectional variable flow pipeline comprises a throttling element (12) and a first one-way valve (13) which are connected in parallel; the upper heat exchange part (5) is connected with the first end of the bidirectional variable flow pipeline through a first flow dividing head (9); the lower heat exchange part (6) is connected with the second end of the bidirectional variable flow pipeline through a second flow dividing head (10); the second end of the bidirectional variable flow pipeline is connected with the second end of the four-way reversing valve (3) through an SVD (singular value decomposition) pipe (18); a first electromagnetic valve (15) is arranged on the SVD pipe (18); the first end of the bidirectional variable flow pipeline is connected with a liquid pipe (17) through an electronic expansion valve (11); wherein the first one-way valve (13) defines a passage for the bidirectional variable flow line from the second end to the first end;
the second electromagnetic valve (7) is connected to a communicating pipeline between the first flow dividing head (9) and the lower heat exchange part (6);
a second check valve (8) connected to a communication pipe between the upper heat exchange part (5) and the lower heat exchange part (6) to define a passage from the lower heat exchange part (6) to the upper heat exchange part (5);
the control part is used for controlling the first electromagnetic valve (15) and the second electromagnetic valve (7) to be closed in the heating mode; and in the defrosting mode, the four-way reversing valve (3) is controlled to reverse, and the second electromagnetic valve (7) is controlled to open.
Compared with the prior art, the invention has the advantages and positive effects that: the air conditioner outdoor unit is based on a bidirectional variable flow pipeline formed by connecting the throttling element (12) and the first one-way valve (13) in parallel, when heating, a refrigerant enters the lower heat exchange part (6) from the throttling element (12) for heat exchange, the throttling element (12) reduces the flow of the refrigerant flowing through the lower heat exchange part (6), and the heat exchange efficiency of the lower heat exchange part (6) is improved; during defrosting, the refrigerant flowing through the lower heat exchange part (6) does not pass through the throttling element (12), so that the refrigerant flow of the lower heat exchange part (6) is improved, the defrosting speed of the lower heat exchange part (6) is improved, and the defrosting time of the lower heat exchange part is shortened; through the flow path design of the bidirectional variable flow pipeline, the refrigerant quantity at different positions of the outdoor heat exchanger is in the optimal state in the heating and defrosting modes, the overall heat exchange efficiency is improved, the overall defrosting time is shortened, and the technical problem that the optimal flow path design of the heating mode and the defrosting mode of the conventional outdoor air conditioner can not be achieved simultaneously is solved.
Other features and advantages of the present invention will become more apparent from the detailed description of the embodiments of the present invention when taken in conjunction with the accompanying drawings.
Drawings
Fig. 1 is a schematic view of air output of a conventional top air outlet outdoor unit;
FIG. 2 is a schematic diagram of the amount of frost formation and heat waste of a top outlet outdoor unit of the prior art;
fig. 3 is a schematic view of an outdoor unit of an air conditioner according to a first embodiment of the present invention;
fig. 4 is a schematic flow direction diagram of a refrigerant in the heating mode of the outdoor unit of the air conditioner shown in fig. 3;
fig. 5 is a schematic view illustrating a first refrigerant flow direction in a defrosting mode of the outdoor unit of the air conditioner shown in fig. 3;
fig. 6 is a schematic flow direction diagram of a second refrigerant in the defrosting mode of the outdoor unit of the air conditioner shown in fig. 3;
fig. 7 is a schematic diagram of an outdoor unit of an air conditioner according to a second embodiment of the present invention.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
As shown in fig. 3, in the outdoor unit of an air conditioner according to the present invention, both the gas pipe (16) and the liquid pipe (17) are connected to the indoor unit of the air conditioner; the compressor (1) is connected with the oil separator (2) in series; the outdoor heat exchanger comprises an upper heat exchange part (5) and a lower heat exchange part (6); a first end 1 of the four-way reversing valve (3) is connected with a gas pipe (16), a second end 2 is connected with an oil separator (2), a third end 3 is connected with an outdoor heat exchanger through a C pipeline (4), and a fourth end 4 is connected with a compressor (1); the bidirectional variable flow pipeline comprises a throttling element (12) and a first one-way valve (13) which are connected in parallel; the upper heat exchange part (5) is connected with a first end a of the bidirectional variable flow pipeline through a first flow dividing head (9); the lower heat exchange part (6) is connected with a second end b of the bidirectional variable flow pipeline through a second flow dividing head (10); the second end b of the bidirectional variable flow pipeline is connected with the second end 2 of the four-way reversing valve (3) through an SVD (singular value decomposition) pipe (18); a first electromagnetic valve (15) is arranged on the SVD pipe (18); the first end a of the bidirectional variable flow pipeline is connected with a liquid pipe (17) through an electronic expansion valve (11); wherein the first one-way valve (13) defines a passage of the bidirectional variable flow line from the second end b to the first end a; the second electromagnetic valve (7) is connected to a communicating pipeline between the first shunt head (9) and the lower heat exchange part (6); the second one-way valve (8) is connected to a communicating pipeline between the upper heat exchange part (5) and the lower heat exchange part (6) to limit a passage from the lower heat exchange part (6) to the upper heat exchange part (5); the third one-way valve (14) is connected to a communication pipeline between the first end a of the bidirectional variable flow pipeline and the first flow dividing head (9).
In the embodiment of the invention, the outdoor heat exchanger is divided into an upper heat exchange part (5) and a lower heat exchange part (6), and each part corresponds to a flow dividing head and a corresponding calculated capillary tube group.
In some embodiments of the invention, the throttling element (12) is a capillary tube or an electronic expansion valve, when the electronic expansion valve is used, the throttling function can be ensured during heating, the refrigerant can be completely closed when not needed to pass through, and the opening degree can be dynamically adjusted according to different operating conditions, so that the refrigerant quantity can be better controlled.
In combination with the above-mentioned air conditioner outdoor unit architecture, the present invention realizes heating or defrosting of the air conditioner based on the control of the control unit (not shown in the figure).
In the heating mode, the control part controls the first electromagnetic valve (15) and the second electromagnetic valve (7) to be closed; specifically, as shown in fig. 4, the liquid refrigerant enters the outdoor unit through the liquid pipe (17), and is throttled into a gas-liquid two-phase state by the electronic expansion valve (11) and then divided into two paths: one path flows into a bidirectional variable flow pipeline, and because the flow direction of the first one-way valve (13) is limited, the refrigerant can only flow through the throttling element (12), enters the second flow dividing head (10) after passing through the throttling element (12), and enters the lower heat exchange part (6) for heat exchange after passing through the capillary tube group to become a gaseous refrigerant; and the other path of the refrigerant passes through the third one-way valve (14) and then enters the first flow dividing head (9) through a pipeline, and enters the upper heat exchange part (5) for heat exchange after passing through the capillary group because the second electromagnetic valve (7) is closed, so that the refrigerant becomes a gaseous refrigerant.
The gaseous refrigerant after heat exchange of the lower heat exchange part (6) is mixed with the gaseous refrigerant after heat exchange of the upper heat exchange part (5) through the second one-way valve (8), and then returns to the compressor (1) through the C pipeline (4) and the four-way reversing valve (3).
The throttling element (12) is connected with the capillary tube of the lower heat exchange part (6) in series in the whole process, so that the throttling effect can be achieved, the whole length of the heat exchanger capillary tube group is shortened, the flow of the refrigerant flowing through the lower heat exchange part (6) is reduced, and the heat exchange efficiency of the lower heat exchange part (6) is improved.
In the defrosting mode, the control part controls the four-way reversing valve (3) to keep the state in the heating mode, and controls the first electromagnetic valve (15) to be opened, the second electromagnetic valve (7) to be closed and the electronic expansion valve (11) to be closed. Specifically, as shown in fig. 5, the high-temperature and high-pressure gaseous refrigerant passes through the four-way reversing valve (3) and then flows to the indoor unit through the gas pipe (16); at the moment, as the first electromagnetic valve (15) is opened, a part of high-temperature gaseous refrigerant passes through the first electromagnetic valve (15) and then is divided into two parts, one part of high-temperature gaseous refrigerant enters the lower heat exchange part (6) through the second flow dividing head (10) and the corresponding capillary tube group for defrosting, the other part of high-temperature gaseous refrigerant enters the bidirectional variable flow pipeline, at the moment, as the resistance of the throttling piece (12) to the refrigerant is larger, the refrigerant flows more through the first one-way valve (13), as the electronic expansion valve (11) is closed, the closing finger is adjusted to be close to the small opening of the closing finger, meanwhile, the second electromagnetic valve (7) is kept closed, and the refrigerant enters the upper heat exchange part (5) for defrosting after passing through the third one-way valve (14).
The refrigerant defrosted by the lower heat exchange part (6) is converged with the refrigerant defrosted by the upper part through a second one-way valve (8), and then returns to the compressor (1) through a C pipeline (4).
In the whole defrosting process, compared with the heating process, the refrigerant of the lower heat exchange part (6) does not flow through the throttling piece (12), so that the refrigerant flow of the lower heat exchange part (6) is improved, the defrosting speed of the lower heat exchange part (6) is accelerated, and the defrosting time of the lower heat exchange part (6) is shortened.
Based on the air conditioner outdoor unit architecture shown in fig. 3, the invention further provides a defrosting mode, as shown in fig. 6, in which the control part controls the four-way reversing valve (3) to reverse and controls the second electromagnetic valve (7) to open. Specifically, high-temperature and high-pressure gas coming out of a compressor (1) passes through a four-way reversing valve (3), enters an upper heat exchange part (5) through a C pipeline (4) for defrosting, then enters a lower heat exchange part (6) through a capillary tube group and a first shunt head (9) for defrosting, at the moment, a second electromagnetic valve (7) is opened, and enters a two-way variable flow pipeline through the capillary tube group and a second shunt head (10) after flowing out of the lower heat exchange part (6), the flow resistance of a throttling element (12) is larger than that of a first one-way valve (13), most of refrigerant flows through the first one-way valve (13), then flows through an electronic expansion valve (11) and enters an indoor unit through a liquid tube (17), at the moment, the outlet pressure of a third one-way valve (14) is larger than the inlet pressure, and therefore the refrigerant cannot pass through.
In the whole defrosting process, compared with the heating process, the refrigerant of the lower heat exchange part (6) does not flow through the throttling piece (12), so that the refrigerant flow of the lower heat exchange part (6) is improved, the defrosting speed of the lower heat exchange part (6) is accelerated, and the defrosting time of the lower heat exchange part (6) is shortened.
In the embodiment of the invention, as the refrigerant flowing through the upper heat exchange part (5) is influenced by the throttling element (12) to the refrigerant resistance more than the first one-way valve (13), most of the refrigerant passes through the first one-way valve (13), the throttling element (12) has little influence on the refrigerant flow of the upper heat exchange part (5).
In some embodiments of the present invention, no matter which defrosting mode is used for defrosting, the outdoor heat exchangers may include multiple groups, as shown in fig. 7, a bidirectional variable flow pipeline is provided corresponding to each group of outdoor heat exchangers; each group of bidirectional variable flow pipelines is connected with an SVD pipe (18) through a first electromagnetic valve (15), the first end a is connected with a liquid pipe (17) through an electronic expansion valve (11), and the refrigerant flow exposure control mode is the same as that of the single group of outdoor heat exchangers, which is not described herein.
In some embodiments of the invention, the first check valve (13) may be implemented by a solenoid valve in combination with control of a control part, the control part controlling the closing thereof in the heating mode and the opening thereof in the defrosting mode to implement the function of the check valve.
It should be noted that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art should also make changes, modifications, additions or substitutions within the spirit and scope of the present invention.
Claims (10)
1. An outdoor unit of an air conditioner, comprising:
the gas pipe (16) and the liquid pipe (17) are connected with the indoor unit of the air conditioner;
a compressor (1) and an oil separator (2) connected in series;
an outdoor heat exchanger comprising an upper heat exchange portion (5) and a lower heat exchange portion (6);
the first end of the four-way reversing valve (3) is connected with the gas pipe (16), the second end of the four-way reversing valve is connected with the oil separator (2), the third end of the four-way reversing valve is connected with the outdoor heat exchanger through a C pipeline (4), and the fourth end of the four-way reversing valve is connected with the compressor (1);
it is characterized by also comprising:
the bidirectional variable flow pipeline comprises a throttling element (12) and a first one-way valve (13) which are connected in parallel; the upper heat exchange part (5) is connected with the first end of the bidirectional variable flow pipeline through a first flow dividing head (9); the lower heat exchange part (6) is connected with the second end of the bidirectional variable flow pipeline through a second flow dividing head (10); the second end of the bidirectional variable flow pipeline is connected with the second end of the four-way reversing valve (3) through an SVD (singular value decomposition) pipe (18); a first electromagnetic valve (15) is arranged on the SVD pipe (18); the first end of the bidirectional variable flow pipeline is connected with a liquid pipe (17) through an electronic expansion valve (11); wherein the first one-way valve (13) defines a passage for the bidirectional variable flow line from the second end to the first end;
the second electromagnetic valve (7) is connected to a communicating pipeline between the first flow dividing head (9) and the lower heat exchange part (6);
a second check valve (8) connected to a communication pipe between the upper heat exchange part (5) and the lower heat exchange part (6) to define a passage from the lower heat exchange part (6) to the upper heat exchange part (5);
the control part is used for controlling the first electromagnetic valve (15) and the second electromagnetic valve (7) to be closed in the heating mode; and in the defrosting mode, the state of the four-way reversing valve (3) in the heating mode is controlled to be maintained, and the first electromagnetic valve (15) is controlled to be opened, the second electromagnetic valve (7) is controlled to be closed, and the electronic expansion valve (11) is controlled to be closed.
2. The outdoor unit of claim 1, wherein the orifice member (12) is a capillary tube.
3. The outdoor unit of claim 1, wherein the expansion member (12) is an electronic expansion valve.
4. The outdoor unit of claim 1, wherein the first check valve (13) is a solenoid valve, and the control part controls the valve to be closed in a heating mode and to be opened in a defrosting mode.
5. The outdoor unit of claim 1, wherein the outdoor heat exchangers are provided in plural groups, and a bidirectional variable flow pipe is provided corresponding to each group of the outdoor heat exchangers; each group of bidirectional variable flow pipelines is connected with an SVD pipe (18) through a first electromagnetic valve (15), and the first end of each group of bidirectional variable flow pipelines is connected with a liquid pipe (17) through an electronic expansion valve (11).
6. An outdoor unit of an air conditioner, comprising:
the gas pipe (16) and the liquid pipe (17) are connected with the indoor unit of the air conditioner;
a compressor (1) and an oil separator (2) connected in series;
an outdoor heat exchanger comprising an upper heat exchange portion (5) and a lower heat exchange portion (6);
the first end of the four-way reversing valve (3) is connected with the gas pipe (16), the second end of the four-way reversing valve is connected with the oil separator (2), the third end of the four-way reversing valve is connected with the outdoor heat exchanger through a C pipeline (4), and the fourth end of the four-way reversing valve is connected with the compressor (1);
it is characterized by also comprising:
the bidirectional variable flow pipeline comprises a throttling element (12) and a first one-way valve (13) which are connected in parallel; the upper heat exchange part (5) is connected with the first end of the bidirectional variable flow pipeline through a first flow dividing head (9); the lower heat exchange part (6) is connected with the second end of the bidirectional variable flow pipeline through a second flow dividing head (10); the second end of the bidirectional variable flow pipeline is connected with the second end of the four-way reversing valve (3) through an SVD (singular value decomposition) pipe (18); a first electromagnetic valve (15) is arranged on the SVD pipe (18); the first end of the bidirectional variable flow pipeline is connected with a liquid pipe (17) through an electronic expansion valve (11); wherein the first one-way valve (13) defines a passage for the bidirectional variable flow line from the second end to the first end;
the second electromagnetic valve (7) is connected to a communicating pipeline between the first flow dividing head (9) and the lower heat exchange part (6);
a second check valve (8) connected to a communication pipe between the upper heat exchange part (5) and the lower heat exchange part (6) to define a passage from the lower heat exchange part (6) to the upper heat exchange part (5);
the control part is used for controlling the first electromagnetic valve (15) and the second electromagnetic valve (7) to be closed in the heating mode; and in the defrosting mode, the four-way reversing valve (3) is controlled to reverse, and the second electromagnetic valve (7) is controlled to open.
7. The outdoor unit of claim 6, wherein the orifice member (12) is a capillary tube.
8. The outdoor unit of claim 6, wherein the expansion member (12) is an electronic expansion valve.
9. The outdoor unit of claim 6, wherein the first check valve (13) is a solenoid valve, and the control part controls the valve to be closed in the heating mode and to be opened in the defrosting mode.
10. The outdoor unit of claim 6, wherein the outdoor heat exchangers are provided in plural groups, and a bidirectional variable flow pipe is provided corresponding to each group of the outdoor heat exchangers; each group of bidirectional variable flow pipelines is connected with an SVD pipe (18) through a first electromagnetic valve (15), and the first end of each group of bidirectional variable flow pipelines is connected with a liquid pipe (17) through an electronic expansion valve (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010603443.5A CN113932323B (en) | 2020-06-29 | 2020-06-29 | Outdoor unit of air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010603443.5A CN113932323B (en) | 2020-06-29 | 2020-06-29 | Outdoor unit of air conditioner |
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| CN113932323A true CN113932323A (en) | 2022-01-14 |
| CN113932323B CN113932323B (en) | 2022-08-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023207135A1 (en) * | 2022-04-25 | 2023-11-02 | 郑州海尔新能源科技有限公司 | Heat exchange apparatus and heat exchange system |
Citations (5)
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| KR20030051091A (en) * | 2001-12-20 | 2003-06-25 | 엘지전자 주식회사 | Heating and cooling air conditioner with dual out door heat exchanger |
| CN201297806Y (en) * | 2008-11-27 | 2009-08-26 | 周立明 | Air source heat pump evaporator |
| KR101737365B1 (en) * | 2016-01-28 | 2017-05-29 | 엘지전자 주식회사 | Air conditioner |
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| WO2023207135A1 (en) * | 2022-04-25 | 2023-11-02 | 郑州海尔新能源科技有限公司 | Heat exchange apparatus and heat exchange system |
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| CN113932323B (en) | 2022-08-30 |
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