CN214581891U - Air conditioner heat exchange structure, air conditioning system and air conditioner outdoor unit - Google Patents

Air conditioner heat exchange structure, air conditioning system and air conditioner outdoor unit Download PDF

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Publication number
CN214581891U
CN214581891U CN202120610309.8U CN202120610309U CN214581891U CN 214581891 U CN214581891 U CN 214581891U CN 202120610309 U CN202120610309 U CN 202120610309U CN 214581891 U CN214581891 U CN 214581891U
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heat exchange
exchange module
air conditioner
valve
heat
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杜辉
苏玉海
江标
陈泽波
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Abstract

The utility model discloses an outer machine of air conditioner heat transfer structure, air conditioning system and air conditioner. The air conditioner heat exchange structure includes: the at least two heat exchange modules are adjustable in series-parallel relation and operation state; aiming at the condition that the heat exchanger comprises two heat exchange modules, the first end of the first heat exchange module is connected to the first end of the second heat exchange module through a first three-position on-off valve, and the first end of the first heat exchange module is also connected to the second end of the second heat exchange module through a first throttling device; the second end of the first heat exchange module is connected to the second end of the second heat exchange module through a second three-position on-off valve, and the second end of the first heat exchange module is further connected to the first end of the second heat exchange module through a second throttling device. The utility model discloses set up two at least heat transfer modules at air conditioner heat transfer structure, change heat transfer module connection and running state through control tribit on-off valve and throttling arrangement, guarantee the high-efficient operation under the different operational mode. The cooperation is used to the internal unit, promotes air conditioner and uses travelling comfort and efficiency.

Description

Air conditioner heat exchange structure, air conditioning system and air conditioner outdoor unit
Technical Field
The utility model relates to an air conditioner technical field particularly, relates to an outer machine of air conditioner heat transfer structure, air conditioning system and air conditioner.
Background
The structure of the existing air conditioning system is fixed, an outdoor heat exchanger is generally arranged in an air conditioner outdoor unit, the heat exchange mode is fixed, and for various heat exchange requirements, a single heat exchanger is difficult to meet the refrigeration or heating requirements of users. The following problems are specifically present:
(1) during refrigeration and heating, the refrigerant states of the heat exchangers are different, the pressure drop of the heat exchangers and the heat exchange systems are different, and the fixed flow path of the heat exchanger cannot give consideration to refrigeration and heating and has high efficiency;
(2) when the load changes, the flow rate of the refrigerant is also greatly changed, the pressure drop of the heat exchanger is different from that of the heat exchange system, and the fixed flow path of the heat exchanger cannot give consideration to high load (high refrigerant flow rate) and low load (low refrigerant flow rate) and is efficient at the same time;
(3) the outdoor unit of the air conditioner needs defrosting after frosting in winter, and when defrosting, heat is absorbed from the indoor, the indoor side becomes refrigeration, and the indoor temperature is rapidly reduced, so that discomfort is caused;
(4) for the condition of small load, the output of the unit capacity is overlarge, and the unit is easy to be frequently started and stopped;
(5) in the case of ultra-low temperature heating, the heat exchange temperature difference becomes small due to low outdoor temperature, and heat is difficult to be absorbed from outdoor air.
The air conditioner outdoor unit heat exchanger and the heat exchange mode are fixed to cause the problems of poor heat exchange effect, poor comfort and low energy efficiency in the prior art, and an effective solution is not provided at present.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides an in provide an outer machine of air conditioner heat transfer structure, air conditioning system and air conditioner to solve the fixed problem that leads to the heat transfer effect poor, the travelling comfort is poor, the efficiency is low of outer machine heat exchanger of air conditioner and heat transfer mode among the prior art.
In order to solve the technical problem, an embodiment of the utility model provides an air conditioner heat transfer structure, include: the at least two heat exchange modules have adjustable series-parallel relation, and the running state of each heat exchange module can be adjusted; aiming at the condition that the heat exchanger comprises two heat exchange modules, the first end of the first heat exchange module is connected to the first end of the second heat exchange module through a first three-position on-off valve, and the first end of the first heat exchange module is also connected to the second end of the second heat exchange module through a first throttling device; the second end of the first heat exchange module is connected to the second end of the second heat exchange module through a second three-position on-off valve, and the second end of the first heat exchange module is further connected to the first end of the second heat exchange module through a second throttling device.
Optionally, the first three-position on-off valve is further connected to a first interface of the air conditioner heat exchange structure, the first interface is connected to one end of a third throttling device, and the other end of the third throttling device is used for connecting the indoor heat exchanger.
Optionally, the second three-position on-off valve is further connected to a second interface of the air conditioner heat exchange structure; the second interface is also connected to the at least one compressor directly or via a reversing device.
Optionally, each heat exchange module includes at least one heat exchanger, and when the heat exchange module includes two or more heat exchangers, the two or more heat exchangers are connected in parallel.
Optionally, the ratio of the heat exchange areas of any two heat exchange modules satisfies: the maximum heat exchange area/the minimum heat exchange area is less than or equal to 9.
An embodiment of the utility model provides an air conditioning system, include: the air conditioner comprises at least one air conditioner internal unit and at least one air conditioner external unit, wherein the air conditioner external unit or the air conditioner internal unit is the air conditioner heat exchange structure.
Optionally, when the air conditioning system includes two or more air conditioner external units, the two or more air conditioner external units are connected in parallel.
Optionally, when the air conditioning system includes two or more air conditioner internal units, the two or more air conditioner internal units are connected in parallel.
The embodiment of the utility model provides an outer machine of air conditioner, include: the embodiment of the utility model provides an air conditioner heat transfer structure.
Use the technical scheme of the utility model, this embodiment sets up two at least heat transfer modules at air conditioning system, through controlling corresponding tribit on-off valve and throttling arrangement, can change two above-mentioned at least heat transfer module's relation of connection, and can realize the state change that heat transfer module refrigerates, heats to high-efficient operation under different operational mode and satisfying user's travelling comfort demand can be guaranteed to cooperation air conditioner internal unit or outer machine, improves the unit efficiency simultaneously.
Drawings
Fig. 1 is a schematic structural diagram of an air conditioner external unit according to a first embodiment of the present invention;
fig. 2A is a schematic structural diagram of an air conditioning system (single heat) according to a first embodiment of the present invention;
fig. 2B is a schematic structural diagram of an air conditioning system (heat pump) according to the first embodiment of the present invention;
fig. 3 is a schematic structural diagram of an air conditioning system according to a first embodiment of the present invention;
fig. 4A is a schematic structural diagram of an air conditioning system according to a first embodiment of the present invention;
fig. 4B is a schematic structural diagram of an air conditioning system according to a first embodiment of the present invention;
fig. 5 is a schematic structural diagram six of an air conditioning system according to a first embodiment of the present invention;
fig. 6 is a schematic structural diagram of an air conditioning system according to a second embodiment of the present invention;
fig. 7 is a schematic structural diagram of an air conditioning system according to a second embodiment of the present invention;
fig. 8 is a refrigerant flow path diagram of the high-efficiency refrigeration mode provided by the second embodiment of the present invention;
fig. 9 is another refrigerant flow path diagram in the high-efficiency cooling mode according to the second embodiment of the present invention;
fig. 10 is a refrigerant flow path diagram of a high-load high-efficiency heating mode according to a second embodiment of the present invention;
fig. 11 is a refrigerant flow path diagram of a low-load high-efficiency heating mode according to the second embodiment of the present invention;
fig. 12 is another refrigerant flow path diagram of the low-load high-efficiency heating mode according to the second embodiment of the present invention;
fig. 13 is a refrigerant flow path diagram of a defrosting continuous heating mode according to the second embodiment of the present invention;
fig. 14 is another refrigerant flow path diagram of the defrosting continuous heating mode according to the second embodiment of the present invention;
fig. 15 is a refrigerant flow path diagram of a self-cleaning mode according to the second embodiment of the present invention;
fig. 16 is another refrigerant flow path diagram of the self-cleaning mode according to the second embodiment of the present invention;
fig. 17 is a refrigerant flow path diagram in the ultra low frequency mode according to the second embodiment of the present invention;
fig. 18 is another refrigerant flow path diagram in the ultra low frequency mode according to the second embodiment of the present invention;
fig. 19 is a refrigerant flow path diagram of the ultra-low temperature heating mode according to the second embodiment of the present invention;
fig. 20 is another refrigerant flow path diagram of the ultra-low temperature heating mode according to the second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, 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.
Example one
This embodiment provides an air conditioner heat transfer structure, and this outer machine of air conditioner includes: the series-parallel connection relation between the at least two heat exchange modules can be adjusted, and the running state of each heat exchange module can be adjusted. The at least two heat exchange modules form an outdoor heat exchange system. Specifically, the connection relationship (for example, the relationship of series connection and/or parallel connection) and the operation state (for example, refrigeration, heating and operation stop) of the at least two heat exchange modules in the air conditioner external unit can be determined according to the operation mode of the air conditioning system, and the connection relationship and the operation state are realized by controlling corresponding devices, so that the heat exchange effect is improved, the high efficiency of the operation mode is ensured, the requirement of user comfort is met, and the energy efficiency of the unit is improved. The heat exchange module is used for refrigerating and is used as an evaporator; the heat exchange module heats and serves as a condenser; the heat exchange module stops running, and the heat exchange module does not participate in heat exchange.
The air conditioner outdoor unit comprises a first heat exchange module and a second heat exchange module. An embodiment of the utility model provides an air conditioner heat transfer structure, include: the at least two heat exchange modules have adjustable series-parallel relation, and the running state of each heat exchange module can be adjusted; for the case of including two heat exchange modules, referring to fig. 1, when the air conditioner external unit includes two heat exchange modules, the two heat exchange modules are denoted as a first heat exchange module 11 and a second heat exchange module 12. The first end of the first heat exchange module 11 is connected to the first end of the second heat exchange module 12 through a first three-position on-off valve 21, and the first end of the first heat exchange module 11 is also connected to the second end of the second heat exchange module 12 through a first throttling device 23; the second end of the first heat exchange module 11 is connected to the second end of the second heat exchange module 12 through a second three-position on-off valve 22, and the second end of the first heat exchange module 11 is further connected to the first end of the second heat exchange module 12 through a second throttling device 24.
The following description of the specific embodiment is made with the heat exchange structure located in the air conditioner external unit, and the same is also applicable to the case where the heat exchange structure is located in the air conditioner internal unit.
The first three-position on-off valve 21 is also connected to a first interface A of the air-conditioning heat exchange structure, and the second three-position on-off valve 22 is also connected to a second interface B of the air-conditioning heat exchange structure; namely, the first interface and the second interface are used as external interfaces of an outdoor heat exchange system formed by two heat exchange modules.
This embodiment sets up two at least heat exchange module at the outer machine of air conditioner, through controlling corresponding tribit on-off valve and throttling arrangement, can change two at least heat exchange module's of the aforesaid relation of connection, and can realize the state change that heat exchange module refrigerates, heats to cooperation air conditioner inner machine or outer machine can guarantee the high-efficient operation under different operational mode and satisfy user's travelling comfort demand, improve the unit efficiency simultaneously. The following detailed description will be made with reference to the accompanying drawings.
Specifically, the first three-position on-off valve is connected to one end of a third throttling device, and the other end of the third throttling device is used for being connected with the indoor heat exchanger. The third throttling device is a throttling device between the indoor heat exchange system and the outdoor heat exchange system, and can be arranged at the indoor side or the outdoor side.
The outdoor unit may include at least one compressor, and when the outdoor unit includes two or more compressors, the two or more compressors are connected in parallel. Of course, the at least one compressor may be combined in series or in series and parallel depending on the specific design requirements. The second three-position on-off valve is connected to the at least one compressor directly or through a reversing device.
The connection of the outdoor heat exchange system, the third throttling device and the compressor is realized by the scheme.
The three-position on-off valve (i.e. the first three-position on-off valve and the second three-position on-off valve) can also adopt a switch valve, a four-way valve or any combination of the above.
In the following, a three-position on-off valve configured by an on-off valve is taken as an example, and other three-position on-off valves can be realized by referring to the on-off valve.
Fig. 2A shows a single heat air conditioning system (having only a heating mode), fig. 2B shows a heat pump air conditioning system (having a heating mode and a cooling mode), and as shown in fig. 2A and 2B, the first end of the first heat exchange module 11 is connected to the first end of the second heat exchange module 12 through the first three-position on-off valve 21, and the first end of the first heat exchange module 11 is further connected to the second end of the second heat exchange module 12 through the first throttling device; the second end of the first heat exchange module 11 is connected to the second end of the second heat exchange module 12 through a second three-position on-off valve 22, and the second end of the first heat exchange module 11 is further connected to the first end of the second heat exchange module 12 through a second throttling device.
Indoor side is the air conditioner internal unit in the picture, and outdoor side is the outer machine of air conditioner, the embodiment of the utility model discloses mainly explain as the example with heat pump air conditioning system, and single hot air conditioning system and single cold air conditioning system can carry out similar setting as the demand.
The at least two heat exchange modules can share the first fan 25, so that the number of devices in the air conditioner outdoor unit is reduced, the cost is reduced, and the occupied space is reduced. Of course, one fan may be used for each individual heat exchange module. The fan can be a centrifugal fan, an axial flow fan, a mixed flow fan or a cross flow fan, etc.
A first on-three position on-off valve is connected to one end of the third throttling means 31. The second three-position on-off valve 22 is connected directly to the compressor 32 or to the compressor 32 through a reversing device 33. The indoor heat exchanger 41 is provided with a second fan 42 correspondingly.
As shown in fig. 3, each heat exchange module includes at least one heat exchanger, and when the heat exchange module includes two or more heat exchangers, the two or more heat exchangers are connected in parallel. It should be noted that, in the same air conditioner external unit, the number of heat exchangers included in different heat exchange modules may be the same or different. The heat exchange module comprises two or more heat exchangers, can improve refrigerating capacity or heating capacity, and can be applied to large-refrigerating-capacity units.
The heat exchange areas of the at least two heat exchange modules need to be kept within a reasonable proportioning range so as to realize the balance of cold and heat. Specifically, the ratio of the heat exchange areas of any two heat exchange modules satisfies the following conditions: the maximum heat exchange area/the minimum heat exchange area is less than or equal to 9. For example, in the case that the air conditioner external unit includes two heat exchange modules, the ratio of the heat exchange areas of the two heat exchange modules may be 1:1, or may be 3: 1. In practical application, a heat exchange module with a proper heat exchange area can be selected according to the requirement of an operation mode to execute corresponding functions.
As shown in fig. 4A, the outdoor unit may include at least one compressor 32, and when the outdoor unit includes two or more compressors, the two or more compressors are connected in parallel, specifically, the air outlet of each compressor 32 is connected to the indoor unit of the air conditioner, and the air inlet of each compressor 32 is connected to the second connection point. The air conditioning system shown in fig. 4A can perform heating and defrosting functions. By providing at least one compressor, a greater cold or heat requirement can be met.
As shown in fig. 4B, the air conditioning system may have both cooling and heating functions, in this case, the outdoor unit may include at least one compressor 32 and a reversing device 33, the at least one compressor may share the reversing device, specifically, an exhaust port of each compressor 32 is connected to a first port of the reversing device 33, an intake port of each compressor 32 is connected to a second port of the reversing device 33, a second connection point is connected to a third port of the reversing device 33, and a fourth port of the reversing device 33 is connected to the indoor unit. The air conditioning system shown in fig. 4B can realize the cooling, heating and defrosting functions by reversing the reversing device. The reversing device 33 in the outdoor unit of the air conditioner can be a four-way valve, and can also be replaced by a plurality of switch valves or four-way on-off valves.
The number of the heat exchange modules in the air conditioner outdoor unit is preferably 2 to 5. Based on the situation of the two heat exchange modules shown in fig. 1 and 2, when more than two heat exchange modules are arranged, the number of three-position on-off valves and/or throttling devices needs to be increased and some connection relations need to be changed, as shown in fig. 5, the structure of the air conditioner outdoor unit comprises three heat exchange modules, the three heat exchange modules are respectively marked as a first heat exchange module 11, a second heat exchange module 12 and a third heat exchange module 13, a first end of the first heat exchange module 11 is connected to a first end of the second heat exchange module 12 through a three-position on-off valve 211, and a second end of the first heat exchange module 11 is further connected to a second end of the second heat exchange module 12 through a three-position on-off valve 213; the first end of the second heat exchange module 12 is connected to the first end of the third heat exchange module 13 through a three-position on-off valve 212, and the second end of the second heat exchange module 12 is further connected to the second end of the third heat exchange module 13 through a three-position on-off valve 214; the three-position on-off valve 211 and the three-position on-off valve 212 are also connected to the throttle device 31 through a three-position on-off valve 215. The three-position on-off valve 213 and the three-position on-off valve 214 are also connected to a second end of the outdoor unit of the air conditioner. The second end of the first heat exchange module 11 is connected between the three-position on-off valve 212 and the three-position on-off valve 215 through a throttling device 216. The first end of the first heat exchange module 11 is connected to the second end of the second heat exchange module 12 through a throttling device 217. The second end of the second heat exchange module 12 is also connected to the first end of the third heat exchange module 13 by means of a throttling means 218. The three-position on-off valve 211 is also connected to a second end of the third heat exchange module 13 via a throttle 219.
The embodiment of the utility model provides an in throttling arrangement can be electronic expansion valve, thermal expansion valve, choke valve etc. have the throttling arrangement of flow control function, also can be the capillary. The embodiment of the utility model provides an in the ooff valve can be solenoid valve, electronic expansion valve etc. have the valve member of switch function.
Example two
The present embodiment provides an air conditioning system including: at least one air conditioner internal unit and at least one air conditioner external unit, air conditioner external unit or air conditioner internal unit include foretell air conditioner heat transfer structure.
This embodiment sets up two at least heat exchange module at the outer machine of air conditioner, through controlling corresponding tribit on-off valve and throttling arrangement, can change two at least heat exchange module's of the aforesaid relation of connection, and can realize the state change that heat exchange module refrigerates, heats to cooperation air conditioner inner machine or outer machine can guarantee the high-efficient operation under different operational mode and satisfy user's travelling comfort demand, improve the unit efficiency simultaneously.
As shown in fig. 6, when the air conditioning system includes two or more air conditioner indoor units, the two or more air conditioner indoor units are connected in parallel. It can be understood that the two or more air conditioner indoor units form an indoor unit system connected in parallel, and can simultaneously perform air conditioning for multiple areas.
As shown in fig. 7, when the air conditioning system includes two or more outdoor air conditioning units, the two or more outdoor air conditioning units are connected in parallel. If the third throttling device is arranged outside the room, the two or more air conditioner external units can be respectively provided with the third throttling device, and can also share the third throttling device. By arranging two or more air conditioner external units, the requirement of large cooling capacity or heat can be met.
The air conditioning system can be a separated air conditioning system or a complete air conditioning system, and for the complete air conditioning system, an inner machine and an outer machine can share one fan so as to save cost and space.
This embodiment sets up two at least heat exchange module at the outer machine of air conditioner, through controlling corresponding tribit on-off valve and throttling arrangement, can change two at least heat exchange module's of the aforesaid relation of connection, and can realize the state change that heat exchange module refrigerates, heats to cooperation air conditioner inner machine or outer machine can guarantee the high-efficient operation under different operational mode and satisfy user's travelling comfort demand, improve the unit efficiency simultaneously.
Wherein the operation mode at least comprises one of the following modes: the system comprises a high-efficiency refrigeration mode, a high-load high-efficiency heating mode, a low-load high-efficiency heating mode, a defrosting continuous heating mode, a self-cleaning mode, an ultra-low frequency mode and an ultra-low temperature heating mode.
The following description will be made with reference to the accompanying drawings, taking an example in which an air conditioner external unit includes two heat exchange modules. In the refrigerant flow path diagrams of fig. 8 to 20, the thick lines in the direction changing device 33 indicate that the corresponding two ports communicate with each other.
Fig. 8 shows a refrigerant flow path diagram in the high-efficiency cooling mode and operation states of the respective modules and components. As shown in fig. 8, when the operation mode is the high-efficiency cooling mode, the first heat exchange module and the second heat exchange module are connected in series, and the first heat exchange module and the second heat exchange module perform heating; the specific control scheme comprises the following steps: and controlling a first three-position on-off valve to communicate the first end of the second heat exchange module with the first interface of the air-conditioning heat exchange structure, controlling a second three-position on-off valve to communicate the second end of the first heat exchange module with the second interface of the air-conditioning heat exchange structure, wherein the opening degree of the first throttling device is greater than the preset opening degree, closing the second throttling device, and throttling by the third throttling device. The two heat exchange modules are in a series connection mode and are in a heating state, so that the heat exchange effect is improved, the refrigeration efficiency of the air conditioning system is improved, and efficient refrigeration is realized.
The opening degree of the throttling device is larger than the preset opening degree, which indicates that the throttling device allows the refrigerant to flow through, does not throttle or has a weak throttling effect, for example, an electronic expansion valve can be opened to the maximum, or a short capillary tube is used. In fig. 8 to 20, "on" indicates a state where the throttle device is not throttled or is weakly throttled, "throttle" indicates that the throttle device is normally throttled, and "off" indicates that the throttle device is not able to flow the refrigerant.
Fig. 9 also shows an alternative refrigerant flow diagram for the high efficiency cooling mode and the operation of the various modules and components. As shown in fig. 9, the first heat exchange module and the second heat exchange module are connected in series, and the first heat exchange module and the second heat exchange module perform heating; the specific control scheme comprises the following steps: and controlling a first three-position on-off valve to communicate the first end of the first heat exchange module with the first interface of the air-conditioning heat exchange structure, controlling a second three-position on-off valve to communicate the second end of the second heat exchange module with the second interface of the air-conditioning heat exchange structure, closing the first throttling device, and throttling by the third throttling device, wherein the opening degree of the second throttling device is greater than the preset opening degree. Fig. 9 is different from fig. 8 mainly in that the refrigerant flows through the first heat exchange module and the second heat exchange module in different orders.
Fig. 10 shows a refrigerant flow diagram in the high-load high-efficiency heating mode and operation states of the respective modules and components. As shown in fig. 10, when the operation mode is the high-load high-efficiency heating mode, the first heat exchange module and the second heat exchange module are connected in parallel, and the first heat exchange module and the second heat exchange module perform cooling; the specific control scheme comprises the following steps: and controlling the three-way communication between the first three-position on-off valve and the second three-position on-off valve, closing the first throttling device and the second throttling device, and throttling by the third throttling device. Under high load, the two heat exchange modules are in a parallel connection mode, the refrigerant flow is short, and the two heat exchange modules are in a refrigeration state, so that the heat exchange effect is improved, and the heating efficiency of the air conditioning system is improved.
In addition to the high-load high-efficiency heating mode, a low-load high-efficiency heating mode is also included. Fig. 11 shows a refrigerant flow diagram in the low-load high-efficiency heating mode and the operation states of the respective modules and components. As shown in fig. 11, when the operation mode is the low-load high-efficiency heating mode, the first heat exchange module and the second heat exchange module are connected in series, and the first heat exchange module and the second heat exchange module perform cooling; the specific control scheme comprises the following steps: and controlling a first three-position on-off valve to communicate the first end of the second heat exchange module with the first interface of the air-conditioning heat exchange structure, controlling a second three-position on-off valve to communicate the second end of the first heat exchange module with the second interface of the air-conditioning heat exchange structure, wherein the opening degree of the first throttling device is greater than the preset opening degree, closing the second throttling device, and throttling by the third throttling device. Under the low load, the two heat exchange modules are in a series connection mode, the refrigerant flow path is few, the refrigerant flow path is long, and the two heat exchange modules are in a refrigeration state, so that the heat exchange effect is improved, and the heating efficiency of the air conditioning system is improved.
Meanwhile, fig. 12 also shows another alternative refrigerant flow path diagram of the low-load high-efficiency heating mode and the operation states of the modules and components. As shown in fig. 12, the first heat exchange module and the second heat exchange module are connected in series, and the first heat exchange module and the second heat exchange module perform refrigeration; the specific control scheme comprises the following steps: and controlling a first three-position on-off valve to communicate the first end of the first heat exchange module with the first interface of the air-conditioning heat exchange structure, controlling a second three-position on-off valve to communicate the second end of the second heat exchange module with the second interface of the air-conditioning heat exchange structure, closing the first throttling device, and throttling by the third throttling device, wherein the opening degree of the second throttling device is greater than the preset opening degree. Fig. 12 is different from fig. 11 mainly in that the refrigerant flows through the first heat exchange module and the second heat exchange module in different orders.
Fig. 13 shows a refrigerant flow diagram in the defrosting continuous heating mode and operation states of the respective modules and components. The defrosting mode comprises a first continuous heating mode and a second continuous heating mode, the first continuous heating mode is as shown in fig. 13, the first heat exchange module and the second heat exchange module are connected in series, the first heat exchange module heats, and the second heat exchange module refrigerates; the specific control scheme comprises the following steps: and controlling a first three-position on-off valve to communicate the first end of the first heat exchange module with the first interface of the air-conditioning heat exchange structure, controlling a second three-position on-off valve to communicate the second end of the second heat exchange module with the second interface of the air-conditioning heat exchange structure, closing the first throttling device, throttling by the second throttling device, and enabling the opening degree of the third throttling device to be larger than the preset opening degree.
Fig. 14 shows another alternative refrigerant flow diagram and the operation of the modules and components in the defrosting continuous heating mode. In the second continuous heating mode, as shown in fig. 14, the first heat exchange module and the second heat exchange module are connected in series, the first heat exchange module performs cooling, and the second heat exchange module performs heating; the specific control scheme comprises the following steps: and controlling a first three-position on-off valve to communicate the first end of the second heat exchange module with the first interface of the air-conditioning heat exchange structure, controlling a second three-position on-off valve to communicate the second end of the first heat exchange module with the second interface of the air-conditioning heat exchange structure, throttling by the first throttling device, closing the second throttling device, and enabling the opening degree of the third throttling device to be larger than the preset opening degree.
Under the continuous mode of heating of defrosting, two heat exchange module are in the tandem state, and the throttling arrangement of series connection is in the throttle state between two heat exchange module, and another throttling arrangement is located the closed condition, and the heat exchange module that needs the defrosting is in the state of heating, and partly heat exchange module is in the refrigeration state in addition, through the transform of the cold and hot state of heat exchange module, realizes heat exchange module defrosting in turn, avoids defrosting to lead to indoor temperature to descend, guarantees user's travelling comfort.
Fig. 15 shows a refrigerant flow path diagram in the self-cleaning mode and operation states of the respective modules and components. As shown in fig. 15, when the operation mode is the self-cleaning mode, the first heat exchange module and the second heat exchange module are connected in series, the first heat exchange module performs heating, and the second heat exchange module performs cooling; the specific control scheme comprises the following steps: and controlling a first three-position on-off valve to communicate the first end of the second heat exchange module with the first interface of the air-conditioning heat exchange structure, controlling a second three-position on-off valve to communicate the second end of the first heat exchange module with the second interface of the air-conditioning heat exchange structure, throttling by the first throttling device, closing the second throttling device, and enabling the opening degree of the third throttling device to be larger than the preset opening degree.
Fig. 16 shows an alternative coolant flow diagram for the self-cleaning mode and the operation of the various modules and components. As shown in fig. 16, the first heat exchange module and the second heat exchange module are connected in series, the first heat exchange module performs refrigeration, and the second heat exchange module performs heating; the specific control scheme comprises the following steps: and controlling a first three-position on-off valve to communicate the first end of the first heat exchange module with the first interface of the air-conditioning heat exchange structure, controlling a second three-position on-off valve to communicate the second end of the second heat exchange module with the second interface of the air-conditioning heat exchange structure, closing the first throttling device, throttling by the second throttling device, and enabling the opening degree of the third throttling device to be larger than the preset opening degree.
In the self-cleaning mode, the two heat exchange modules are in a serial state, the throttling device connected in series between the two heat exchange modules is in a throttling state, the other throttling device is in a closed state, the heat exchange module needing self-cleaning is in a refrigerating state, the other part of the heat exchange modules are in a heating state, the heat exchanger is cleaned by condensed water, and the heat exchange modules are self-cleaned in turn by changing the cold and hot states of the heat exchange modules.
Fig. 17 shows a refrigerant flow path diagram in the ultra low frequency mode and operation states of the respective modules and components. As shown in fig. 17, when the operation mode is the ultra low frequency mode, the first heat exchange module heats, and the second heat exchange module is turned off; the specific control scheme comprises the following steps: and controlling a first three-position on-off valve to communicate the first end of the first heat exchange module with the first interface of the air conditioner heat exchange structure, controlling a second three-position on-off valve to communicate the second end of the first heat exchange module with the second interface of the air conditioner heat exchange structure, closing the first throttling device and the second throttling device, and throttling by the third throttling device.
Fig. 18 shows an alternative refrigerant flow diagram for the ultra low frequency mode and the operation of the various modules and components. As shown in fig. 18, the first heat exchange module is turned off, and the second heat exchange module performs heating; the specific control scheme comprises the following steps: and controlling a first three-position on-off valve to communicate the first end of the second heat exchange module with the first interface of the air-conditioning heat exchange structure, controlling a second three-position on-off valve to communicate the second end of the second heat exchange module with the second interface of the air-conditioning heat exchange structure, closing the first throttling device and the second throttling device, and throttling by the third throttling device.
The ultra-low frequency mode further reduces output by reducing the area of the heat exchanger, achieves matching with indoor required load, and reduces the startup and shutdown of the unit. At the moment, one part of the heat exchange modules participates in system heat exchange, the other part of the heat exchange modules is disconnected and does not participate in system heat exchange, and the mode can be adopted when the air conditioning system needs to refrigerate and heat.
Fig. 19 shows a refrigerant flow path diagram in the ultra-low-temperature heating mode and operation states of the respective modules and components. As shown in fig. 19, when the operation mode is the ultra-low temperature heating mode, the first heat exchange module and the second heat exchange module are connected in series, and the first heat exchange module and the second heat exchange module perform cooling; the specific control scheme comprises the following steps: and controlling a first three-position on-off valve to communicate the first end of the first heat exchange module with the first interface of the air conditioner heat exchange structure, controlling a second three-position on-off valve to communicate the second end of the second heat exchange module with the second interface of the air conditioner heat exchange structure, closing the first throttling device, throttling by the second throttling device, and throttling by the third throttling device.
Fig. 20 shows an alternative refrigerant flow diagram for the ultra-low-temperature heating mode and the operation of the modules and components. As shown in fig. 20, the first heat exchange module and the second heat exchange module are connected in series, and the first heat exchange module and the second heat exchange module perform refrigeration; the specific control scheme comprises the following steps: and controlling a first three-position on-off valve to be communicated with the first end of the second heat exchange module and the first interface of the air conditioner heat exchange structure, controlling a second three-position on-off valve to be communicated with the second end of the first heat exchange module and the second interface of the air conditioner heat exchange structure, throttling by the first throttling device, closing by the second throttling device, and throttling by the third throttling device. Fig. 20 is different from fig. 19 mainly in that the refrigerant flows through the first heat exchange module and the second heat exchange module in different orders.
When the outdoor temperature is extremely low, the heat exchange temperature difference becomes a key factor influencing the heat exchange effect, in order to increase the heat exchange temperature difference, the evaporation temperature of an external machine needs to be reduced, and at the moment, a secondary throttling mode is adopted, so that part of heat exchangers obtain lower evaporation temperature, and heat is obtained from a low-temperature environment.
The operation modes include a plurality of operation modes for continuous heating, and for this purpose, after the operation mode of the air conditioning system is detected, the method further includes: under the condition that the air conditioning system heats, detecting specified parameters of the air conditioning system, and judging whether the air conditioning system frosts according to the specified parameters; when the air-conditioning system is frosted, detecting the frosting condition, and controlling the air-conditioning system to intermittently operate a specified heating mode, the first continuous heating mode and the second continuous heating mode according to the frosting condition, or controlling the air-conditioning system to intermittently operate the first continuous heating mode and the second continuous heating mode; wherein the specified heating mode comprises at least one of: a high-load high-efficiency heating mode, a low-load high-efficiency heating mode, a heating mode in an ultra-low frequency mode, and an ultra-low temperature heating mode. The specified parameter for judging whether the air conditioning system is frosted may include at least one of: the refrigerant temperature, the system pressure, the ambient temperature and the ambient humidity, and of course, other parameters may be used to determine frosting. Under the condition of less frosting, the air conditioning system can be continuously controlled to heat, when the frosting reaches a certain degree, the defrosting is carried out (namely, a defrosting continuous heating mode is entered), and after the defrosting is finished, the corresponding heating mode is timely switched back to carry out heating. If the frosting is serious, the air conditioning system can intermittently operate the first continuous heating mode and the second continuous heating mode within a period of time. The intermittent operation of the modes is controlled under the frosting condition, so that continuous heating can be realized, and the indoor heating effect is ensured to be effectively defrosted.
For the condition that the air conditioner outdoor unit comprises three heat exchange modules or more heat exchange modules, the control of various operation modes can be realized aiming at a specific structure.
In the existing air conditioning system, a heating mode and a cooling mode share a system branch, a proper flow path for cooling is too many branches for heating, the flow rate of a refrigerant is too low, and the heating is not efficient, namely, the flow length and the number of the flow paths have obvious influence on the heat exchange effect. The embodiment of the utility model provides a through system's transform, adjust heat exchange module's relation of connection and running state in the outer machine of air conditioner, realize heat exchanger flow length, flow path number and cold and hot, the more suitable matching of velocity of flow state of refrigerant to guarantee system operation high efficiency.
In the refrigerant flow path diagrams shown in fig. 8 to 20, the section of the flow path from the compressor discharge port to the first throttling device in the throttling state is a high-pressure refrigerant flow path, and the section of the flow path from the first throttling device in the throttling state to the compressor suction port is a low-pressure refrigerant flow path, in terms of the refrigerant flow direction.
For example, in fig. 8, the third throttling device 31 is in a throttling state and has a throttling function, a high-temperature and high-pressure gaseous refrigerant is discharged from an exhaust port of the compressor 32, enters the first heat exchange module 11 through the reversing device 33 and the second three-position on-off valve 22 to be condensed and radiated (i.e., the first heat exchange module 11 is in a heating state and serves as a condenser), the condensed refrigerant enters the second heat exchange module 12 through the first throttling device 23 to be condensed again (i.e., the second heat exchange module 12 is in a heating state and serves as a condenser), and then flows to the third throttling device 31 through the first three-position on-off valve 21, the refrigerant enters the indoor heat exchanger 41 (serving as an evaporator) after being throttled by the third throttling device 31, and then returns to an air suction port of the compressor 32 through the reversing device 33, thereby completing a refrigeration cycle. In the refrigerating cycle, the section of the flow path from the discharge port of the compressor 32 to the third throttling device 31 is a high-pressure refrigerant flow path, and the section of the flow path from the third throttling device 31 to the suction port of the compressor 32 is a low-pressure refrigerant flow path.
EXAMPLE III
Based on the air conditioner heat transfer structure that provides in the above-mentioned embodiment one the utility model discloses still provide an outer machine of air conditioner in the preferred embodiment three, include the utility model discloses embodiment one the air conditioner heat transfer structure.
This embodiment sets up two at least heat exchange module at the outer machine of air conditioner, through controlling corresponding tribit on-off valve and throttling arrangement, can change two at least heat exchange module's of the aforesaid relation of connection, and can realize the state change that heat exchange module refrigerates, heats to cooperation air conditioner inner machine or outer machine can guarantee the high-efficient operation under different operational mode and satisfy user's travelling comfort demand, improve the unit efficiency simultaneously.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (9)

1. An air conditioner heat exchange structure, comprising: the heat exchanger comprises at least two heat exchange modules, wherein the series-parallel relation between the at least two heat exchange modules is adjustable, and the running state of each heat exchange module is adjustable;
aiming at the condition that the heat exchanger comprises two heat exchange modules, the first end of a first heat exchange module is connected to the first end of a second heat exchange module through a first three-position on-off valve, and the first end of the first heat exchange module is also connected to the second end of the second heat exchange module through a first throttling device;
the second end of the first heat exchange module is connected to the second end of the second heat exchange module through a second three-position on-off valve, and the second end of the first heat exchange module is further connected to the first end of the second heat exchange module through a second throttling device.
2. The heat exchange structure of claim 1, wherein the first three-position on-off valve is further connected to a first port of the heat exchange structure of the air conditioner, the first port is connected to one end of a third throttling device, and the other end of the third throttling device is used for connecting an indoor heat exchanger.
3. The air conditioner heat exchange structure of claim 1, wherein the second three-position on-off valve is further connected to a second port of the air conditioner heat exchange structure;
the second interface is also directly connected with at least one compressor or connected with at least one compressor through a reversing device.
4. The heat exchange structure of an air conditioner according to claim 1, wherein each of the heat exchange modules includes at least one heat exchanger, and when the heat exchange module includes two or more heat exchangers, the two or more heat exchangers are connected in parallel.
5. The heat exchange structure of an air conditioner as claimed in claim 1, wherein the ratio of the heat exchange areas of any two heat exchange modules satisfies: the maximum heat exchange area/the minimum heat exchange area is less than or equal to 9.
6. An air conditioning system, comprising: at least one air conditioner indoor unit and at least one air conditioner outdoor unit, wherein the air conditioner outdoor unit or the air conditioner indoor unit comprises the air conditioner heat exchange structure as claimed in any one of claims 1 to 5.
7. The system of claim 6, wherein when the system includes two or more outdoor units, the two or more outdoor units are connected in parallel.
8. The air conditioning system of claim 6, wherein when the air conditioning system includes two or more air conditioning indoor units, the two or more air conditioning indoor units are connected in parallel.
9. An outdoor unit for an air conditioner, comprising: the heat exchange structure of an air conditioner according to any one of claims 1 to 5.
CN202120610309.8U 2021-03-25 2021-03-25 Air conditioner heat exchange structure, air conditioning system and air conditioner outdoor unit Active CN214581891U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112902479A (en) * 2021-03-25 2021-06-04 珠海格力电器股份有限公司 Air conditioner heat exchange structure, air conditioner system, control method of air conditioner system and air conditioner outdoor unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112902479A (en) * 2021-03-25 2021-06-04 珠海格力电器股份有限公司 Air conditioner heat exchange structure, air conditioner system, control method of air conditioner system and air conditioner outdoor unit

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