EP4043809B1 - Ausseneinheit einer klimaanlage und steuerungsverfahren - Google Patents

Ausseneinheit einer klimaanlage und steuerungsverfahren

Info

Publication number
EP4043809B1
EP4043809B1 EP19948665.5A EP19948665A EP4043809B1 EP 4043809 B1 EP4043809 B1 EP 4043809B1 EP 19948665 A EP19948665 A EP 19948665A EP 4043809 B1 EP4043809 B1 EP 4043809B1
Authority
EP
European Patent Office
Prior art keywords
temperature
driving module
heat
heat exchange
refrigerant
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP19948665.5A
Other languages
English (en)
French (fr)
Other versions
EP4043809A1 (de
EP4043809A4 (de
Inventor
Weixing Chen
Zhongchao LIN
Peichun Cao
Shibo NIU
Shilei DONG
Shipo ZHENG
Dongli Zhang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Original Assignee
Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201910970017.2A external-priority patent/CN112648685A/zh
Priority claimed from CN201921707838.9U external-priority patent/CN210772502U/zh
Priority claimed from CN201921706951.5U external-priority patent/CN210801418U/zh
Priority claimed from CN201910970156.5A external-priority patent/CN110762788A/zh
Priority claimed from CN201921706388.1U external-priority patent/CN210801417U/zh
Application filed by Qingdao Hisense Hitachi Air Conditioning System Co Ltd filed Critical Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Publication of EP4043809A1 publication Critical patent/EP4043809A1/de
Publication of EP4043809A4 publication Critical patent/EP4043809A4/de
Application granted granted Critical
Publication of EP4043809B1 publication Critical patent/EP4043809B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • F24F1/20—Electric components for separate outdoor units
    • F24F1/24—Cooling of electric components
    • 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
    • F24F1/08—Compressors specially adapted for separate outdoor units
    • 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
    • F24F1/30—Refrigerant piping for use inside the separate outdoor units

Definitions

  • the present disclosure relates to a field of air conditioner technologies, and in particular, to an outdoor unit of an air conditioner, a circulating system and a control method.
  • a compressor of an outdoor unit of an air conditioner is driven by a driving module.
  • the driving module is cooled by a refrigerant heat dissipation system, so as to prevent a temperature of the driving module from rising too high, a high temperature of the driving module may cause a failure of the driving module and safety problems such as fire.
  • heat dissipation by refrigerant has advantages of high heat dissipation efficiency and easy to be controlled. Therefore, the heat dissipation by refrigerant is widely used in the outdoor unit of the air conditioner.
  • an electrical system of the outdoor unit of the multi-connected air conditioner with high-power has two driving modules.
  • two heat exchange blocks 002 are provided on a refrigerant pipe 001 for circulating the refrigerant, and the two heat exchange blocks 002 are fixedly connected to circuit boards of corresponding driving modules, so as to perform heat dissipation and temperature decrease on the driving modules and the circuit boards.
  • the two compressors operate separately, and heat generated by the driving modules corresponding to respective compressors is different. Therefore, the two driving modules have different temperatures.
  • the driving module that does not operate does not generate heat and therefore does not need heat dissipation.
  • a temperature of the driving module that is not operating is also decreased, which causes the temperatures of the two driving modules to be different.
  • KR101734640B1 discloses an outdoor unit of an air conditioner.
  • the outdoor unit of the air conditioner includes a case including a front panel forming a front surface and having a service panel, side panels of both sides, and a rear panel forming a rear surface; an outdoor heat exchanger provided within the case and having four heat exchange surfaces at positions corresponding to suction holes formed on the front panel, the side panels of the both sides, and the rear panel, respectively; a control box provided on a rear side of the service panel and having an electronic case holding electronic parts; and a moving unit provided at one side of the case and guiding the movement of the control box.
  • the control box can be moved within a space between the electronic case and the heat exchange by the moving unit.
  • the outdoor unit of the air conditioner can absorb flow shocks of a coolant, can prevent interference with pipes when the control box is installed in the outdoor unit, and enables pipes of the outdoor or the like to be repaired without removing the control box from the outdoor box.
  • An outdoor unit of the air conditioner includes: a compressor for compressing a first refrigerant introduced from an indoor unit of the air conditioner; a condenser for condensing the first refrigerant compressed by the compressor; a first drive circuit for driving the compressor; a second drive circuit for adjusting a voltage of the first drive circuit; and a cooling unit.
  • the cooling unit includes: a heat dissipating member in thermal contact with the first drive circuit and the second drive circuit; and a refrigerant pipe provided in the heat dissipating member and having a path through which the second refrigerant is moved via the first drive circuit and the second drive circuit. Accordingly, the first drive circuit and the second drive circuit can be efficiently cooled. Also, assemblability of the refrigerant pipe can be improved. Furthermore, the volume of space occupied by the drive circuits inside a control box can be reduced.
  • Embodiments of the present disclosure provide an outdoor unit of an air conditioner and a control method a circulation system, which are capable of controlling a heat transfer between driving modules and improving a balance of temperatures between the driving modules. In this way, a danger of short circuit of the driving module due to a condensation phenomenon caused by an excessively low temperature is avoided.
  • the present invention provides an outdoor unit of an air conditioner which is defined by appended claim 1.
  • the present invention provides a method for controlling the circulation system for the outdoor unit of the air conditioner which is defined by appended claim 4.
  • orientations or positional relationships indicated by the terms such as “center”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner” and “outer” are based on orientations or positional relationships shown in the accompanying drawings. These terms are merely to facilitate and simplify the description of the present disclosure, but not to indicate or imply that the referred devices or elements each must have a particular orientation, or must be constructed or operated in a particular orientation. Therefore, these terms should not be construed as limitations on the present disclosure.
  • first and second are used for descriptive purposes only, and are not to be construed as indicating or implying a relative importance or implicitly indicating a number of indicated technical features. Therefore, the features defined with “first” and “second” may explicitly or implicitly include one or more of these features.
  • the term “a plurality of” means two or more unless otherwise specified.
  • An outdoor unit of an air conditioner is provided by embodiments of the present disclosure.
  • a plurality of compressors 550 are provided in the outdoor unit, each compressor 550 is correspondingly provided with a driving module 400, and each driving module 400 is connected to a heat exchange block 100.
  • Two heat exchange blocks 100 on two adjacent driving modules 400 are connected to each other.
  • a same refrigerant pipe 200 is inserted in a plurality of heat exchange blocks 100, and the refrigerant pipe 200 is used for circulating the refrigerant.
  • the heat exchange block 100 is used for exchanging heat between the refrigerant pipe 200 and the driving module 400, so as to decrease the temperature of the driving module 400.
  • the two adjacent heat exchange blocks 100 are connected by a heat conduction member 300 for transferring heat between the two heat exchange blocks 100.
  • a heat conduction member 300 for transferring heat between the two heat exchange blocks 100.
  • the heat exchange block 100 provided by the embodiments of the present disclosure may be a thick heat dissipation plate made of a heat conductive material. As shown in FIG. 7 , a through hole 121 is provided in the heat dissipation plate in a direction parallel to a plate surface of the heat dissipation plate, the refrigerant pipe 200 is inserted into the through hole 121, and then the heat dissipation plate is fixedly connected to the driving module 400.
  • the heat exchange block 100 may also be designed as the following structure. As shown in FIGS. 4 and 5 , the heat exchange block 100 includes a fixing plate 110 and a heat conducting portion 120 disposed on the fixing plate 110.
  • the through hole 121 is provided in the heat conducting portion 120 in a length direction of the fixing plate 110.
  • the refrigerant pipe 200 is inserted into the through hole 121.
  • the fixing plate 110 is connected to the driving module 400, and the fixing plate 110 and the heat conducting portion 120 are made of a same material and are integrally formed.
  • a thickness of the heat dissipation plate is at least greater than an outer diameter of the refrigerant pipe 200.
  • a portion of the heat dissipation plate in which the refrigerant pipe 200 is not disposed needs to be connected to the driving module 400 through screws, and if an overall thickness of the heat dissipation plate is large, an inconvenience of opening a hole is existed and the manufacturing difficulty is increased.
  • the through hole 121 for accommodating the refrigerant pipe 200 is provided in the heat conducting portion 120. Therefore, a thickness of the fixing plate 110 does not need to be set to be too large.
  • the cooling capacity of the refrigerant circulating in the refrigerant pipe 200 may be transferred to the driving module 400 quickly, which improves a transfer efficiency of the cooling capacity, facilitates a cooling of the driving module 400, and ensures a stable operation of the driving module 400.
  • the heat conduction member 300 provided by the embodiments of the present disclosure is used to connect two heat exchange blocks 100, so that heat is transferred between the two heat exchange blocks 100.
  • the heat conduction member 300 may use a connecting plate made of the heat conductive material to connect bottom surfaces of the two heat exchange blocks 100, thereby transferring heat between the two heat exchange blocks 100.
  • the heat conduction member 300 may also be of a same structure as the heat exchange block 100, and may be integrally connected with the two heat exchange blocks 100, as shown in FIGS. 5 and 6 .
  • the heat conduction member 300 is tightly connected to an end surface of the heat exchange block 100.
  • the connecting plate is connected to the bottom surface of the heat exchange block 100, that is, a connecting plate is added between the heat exchange block 100 and the driving module 400, therefore a thickness between the refrigerant pipe 200 and the driving module 400 is increased, which does not facilitate the transfer of the cooling capacity to the driving module 400.
  • the heat conduction member 300 is set to a same structure as the heat exchange block 100, and the end surface of the heat conduction member 300 is tightly connected to the end surface of the heat exchange block 100, so that no other structure needs to be added between the heat exchange block 100 and the driving module 400. In this way, not only can the heat of the two heat exchange blocks 100 be transferred, but also an efficiency of transferring the cooling capacity of the refrigerant in the refrigerant pipe 200 to the driving module 400 is not affected.
  • the heat conduction member 300 and the heat exchange block 100 may be made of different heat conductive materials, and the end surfaces of the two are fixed and tightly connected by welding or other processes, so as to ensure the heat transfer efficiency between the heat exchange blocks 100.
  • the heat conduction member 300 and the heat exchange block 100 may also be made of the same material and are integrally formed.
  • the heat conduction member 300 and the heat exchange block 100 provided by the embodiments of the present disclosure are made of the same material and are integrally formed, as shown in FIGS. 8 and 9 . That is, in this solution, an elongated heat exchange block 100 is used, and two ends of the elongated heat exchange block 100 are each connected to a driving module 400. When a difference between the temperatures of the two driving modules 400 is large, the heat is directly transferred through the elongated heat exchange block 100. Furthermore, since the heat exchange block 100 is of an integrally formed structure, there is no connection gap and the heat transfer efficiency will not be decreased.
  • the driving module 400 is disposed on a circuit substrate 410, the fixing plate 110 is tightly attached to the circuit substrate 410, and the circuit substrate 410 is capable of transferring the cooling capacity of the refrigerant to the driving module 400 to decrease the temperature of the driving module 400.
  • a region of the fixing plate 110 where the heat conducting portion 120 is not provided is fixedly connected to the circuit substrate 410 through screws, and a plate surface of the fixing plate 110 is tightly attached to the circuit substrate 410, so that the temperature of the driving module 400 is decreased by the circuit substrate 410.
  • an outer wall of the refrigerant pipe 200 is tightly attached to an inner wall of the through hole 121 by expanding the refrigerant pipe 200.
  • the outer wall of the refrigerant pipe 200 is tightly attached to the inner wall of the through hole 121 in the heat exchange block 100, so as to enable nicely the cooling capacity of the refrigerant inside the refrigerant pipe 200 to be exchanged with heat of the driving module 400 absorbed by the heat exchange block 100, thereby decreasing the heat of the driving module 400 and enabling the driving module 400 to operate normally.
  • the refrigerant pipe 200 may be bent to form a structure with a plurality of parallel sections, thereby increasing a contact area between the refrigerant pipe 200 and the heat exchange block 100.
  • the driving module 400 is generally a chip with a small volume
  • a volume of the circuit substrate 410 is also small. If there are too many parallel pipe sections disposed in the refrigerant pipe 200, a volume of the heat exchange block 100 will increase, thereby increasing an overall cost of the heat exchange block 100. Therefore, the refrigerant pipe 200 provided by the embodiments of the present disclosure is a U-shaped pipe.
  • the heat exchange block 100 includes two heat conducting portions 120, which are disposed at edges on two sides of the fixing plate 110 in the length direction, and two straight pipe sections of the U-shaped pipe are inserted into the through holes 121 in the two heat conducting portions 120.
  • the refrigerant pipe 200 provided by the embodiments of the present disclosure is a copper pipe.
  • the copper pipe has advantages such as good heat conductivity, good corrosion resistance and high strength at a low temperature.
  • the heat exchange block 100 provided by the embodiments of the disclosure is made of aluminum.
  • Aluminum has advantages such as low price and good heat conductivity. Therefore, by adopting aluminum, costs of the heat exchange block 100 may be reduced while good heat conductivity thereof is ensured.
  • the embodiments of the present disclosure further provide a circulation system for the outdoor unit of the air conditioner as described in the technical solution above.
  • the circulation system includes a subcooling heat exchanger 510, a main electronic expansion valve 520, an outdoor heat exchanger 530 and a four-way valve 540 which are disposed in the outdoor unit and are in communication with each other in sequence through a main circulation liquid pipe 500.
  • the main circulation liquid pipe 500 is in communication with an indoor unit.
  • the four-way valve 540 is further connected with the compressor 550 and a gas-liquid separator 560, the compressor 550 is in communication with the gas-liquid separator 560, and the gas-liquid separator 560 is in communication with the subcooling heat exchanger 510.
  • a cooling circulation branch 600 is provided on the main circulation liquid pipe 500, the cooling circulation branch 600 is in communication with the refrigerant pipe 200, and an auxiliary electronic expansion valve 610 is provided on the cooling circulation branch 600.
  • the circulation system provided by the embodiments of the present disclosure solves the same problems and achieves the same technical effects as the above air conditioner, which will not be repeated herein.
  • the cooling circulation branch 600 provided by the embodiments of the present disclosure is disposed between the subcooling heat exchanger 510 and the outdoor heat exchanger 530, and is connected in parallel with the main electronic expansion valve 520, as shown in FIGS. 3 and 10 .
  • a liquid refrigerant enters the cooling circulation branch 600 from the main circulation liquid pipe 500, exchanges heat with the driving module 400 in the refrigerant pipe 200, takes away the heat of the driving module 400, throttles at the auxiliary electronic expansion valve 610, becomes a low-temperature and low-pressure refrigerant, and then enters the outdoor heat exchanger 530.
  • the temperature of the driving module 400 may be adjusted by adjusting an opening degree of the auxiliary electronic expansion valve 610.
  • the opening degree of the auxiliary electronic expansion valve 610 is controlled to be increased, so that an amount of refrigerant in the cooling circulation branch 600 increases, thereby decreasing the temperature of the driving module 400.
  • the opening degree of the auxiliary electronic expansion valve 610 is controlled to be decreased, so that the amount of refrigerant in the cooling circulation branch 600 decreases, thereby increasing the temperature of the driving module 400.
  • the temperature of the driving modules 400 is adjusted, and heat may be transferred between the driving modules 400 through the heat conduction member 300, which further improves a balance between the driving modules 400.
  • the main electronic expansion valve 520 and the auxiliary electronic expansion valve 610 are connected in parallel with each other, the main electronic expansion valve 520 and the auxiliary electronic expansion valve 610 are used through mutual adjustment.
  • the temperature of a driving module 400 is higher than a safe temperature range and the opening degree of the auxiliary electronic expansion valve 610 is nearly in a fully open state
  • the auxiliary electronic expansion valve 610 is nearly fully opened while the temperature of the driving module 400 still exceeds the safe temperature range, it indicates that the amount of refrigerant in the cooling circulation branch 600 is insufficient. Therefore, it is possible to adjust the opening degree of the main electronic expansion valve 520, that is, to decrease the opening degree of the main electronic expansion valve 520, so as to decrease the amount of the refrigerant passing through the main circulation liquid pipe 500.
  • the amount of refrigerant entering the cooling circulation branch 600 is increased, thereby increasing the cooling capacity used to decrease the temperature of the driving module 400.
  • the temperature of the driving module 400 may be smoothly decreased to a safe temperature range, which prevents damage to the driving module 400 due to an excessive temperature.
  • the opening degree of the auxiliary electronic expansion valve 610 may be set to 85% of the fully open state. In a case where the temperature of the driving module 400 exceeds the safe temperature range, and the opening degree of the auxiliary electronic expansion valve 610 is greater than 85% of the fully open state, at this time, the opening degree of the main electronic expansion valve 520 is controlled to be decreased, thereby increasing the amount of refrigerant in the cooling circulation branch 600.
  • the cooling circulation branch 600 provided by the embodiments of the present disclosure is disposed at an end of the subcooling heat exchanger 510 proximate to the indoor unit, and an outlet of the auxiliary electronic expansion valve 610 is in communication with the subcooling heat exchanger 510, as shown in FIGS. 3 and 11 .
  • the auxiliary electronic expansion valve 610 may be used to replace an electronic expansion valve at an inlet of the subcooling heat exchanger 510, that is, only two electronic expansion valves may be disposed in the circulation system, thereby reducing the cost.
  • a circulation direction of the cooling circulation branch 600 is the same. That is, the liquid refrigerant enters the cooling circulation branch 600 from the main circulation liquid pipe 500, takes away the heat in the driving module 400, and then throttles at the auxiliary electronic expansion valve 610 to become a low-temperature and low-pressure refrigerant.
  • the low-temperature and low-pressure refrigerant passes through the subcooling heat exchanger 510 and exchanges heat with the refrigerant in the main circulation liquid pipe 500, so as to cool the refrigerant in the main circulation liquid pipe 500 and increase a subcooling degree thereof.
  • the low-temperature and low-pressure refrigerant passing through the cooling circulation branch 600 absorbs heat to raise its own temperature and returns to the gas-liquid separator 560, and then enters the compressor 550.
  • the temperature of the driving module 400 is also adjusted by adjusting the opening degree of the auxiliary electronic expansion valve 610.
  • the opening degree of the auxiliary electronic expansion valve 610 is controlled to be increased, so that the amount of the refrigerant in the cooling circulation branch 600 increases, thereby decreasing the temperature of the driving module 400.
  • the opening degree of the auxiliary electronic expansion valve 610 is controlled to be decreased, so that the amount of refrigerant in the cooling circulation branch 600 decreases, thereby increasing the temperature of the driving module 400.
  • the temperature of the driving modules 400 is adjusted, the heat may be transferred between the driving modules 400 through the heat conduction member 300, and a balance between the driving modules 400 is further improved.
  • the embodiments of the present disclosure provide a method for controlling the circulation system as described in the above technical solution.
  • a flow diagram of the method is shown in FIG. 12 .
  • a temperature sensor is provided in each of the driving modules 400, and the temperature sensor is used for detecting the temperature of the driving module 400.
  • the auxiliary electronic expansion valve 610 is continuously adjusted to stabilize the temperature of the driving module 400 within the target temperature.
  • the temperature difference Tc between the temperature Ta of one or more driving modules 400 and the ambient temperature Tb is less than the first preset temperature t1
  • the target temperature is set, and the temperature of the corresponding driving module is monitored by the temperature sensor, so that the target temperature is considered as the target value when continuously controlling and adjusting the opening degree of the auxiliary electronic expansion valve 610. That is, the amount of heat taken away by the refrigerant is adjusted, so that the temperature of the driving module 400 is stabilized around the target temperature, and the temperature of the driving module 400 is prevented from being too low to cause the condensation phenomenon.
  • the opening degree of the auxiliary electronic expansion valve 610 is increased, and the amount of refrigerant circulating in the refrigerant pipe 200 is increased, so that the temperature of the driving module 400 where the temperature is detected to be greater than the target temperature is decreased, and the temperature of the driving module 400 is stabilized at the target temperature.
  • the temperature of the driving module 400 is stabilized at the target temperature.
  • the temperature of each driving module 400 is monitored through a temperature sensor, and a target temperature value is set to continuously feedback the temperature of the driving module 400 through a PID control method. Moreover, the opening degree of the auxiliary electronic expansion valve 610 is continuously adjusted, the amount of refrigerant circulating in the refrigerant pipe 200 is increased or decreased, and the temperature of the driving module 400 is continuously adjusted. Finally, the temperature of the driving module 400 is stable within the safe temperature range.
  • the heat exchange block 100 and the heat conduction member 300 may adopt an integrated structure to transfer the heat between the driving modules 400, so that the temperatures of the driving modules 400 are more balanced, thereby effectively preventing the condensation problem due to the low temperature of the driving module, and ensuring the normal operation of the driving module 400.
  • a plurality of driving modules 400 proximate to the inlet of the cooling circulation branch 600 are controlled to drive the plurality of compressors 550 to operate.
  • the temperature of the refrigerant is increased, so as to ensure that the temperature of the driving module 400 that is not operating will not be too low when the refrigerant passes through the driving module 400 that is not operating, thereby preventing the condensation phenomenon of the driving module 400.
  • the target temperature is set and the temperature of the driving module 400 is adjusted according to the aforementioned control method, so that the temperature of the driving module 400 is stabilized at the target temperature, thereby ensuring that the temperature of the driving module 400 will neither be too high nor too low.
  • control method provided by the embodiments of the present disclosure is also applicable to the outdoor unit of the mono-compressor 550.
  • the first preset temperature is in a range of 2°C to 5°C, inclusive. That is, in a case where the temperature difference between the temperature of the driving module 400 and the ambient temperature is less than the first preset temperature, it is determined that the condensation phenomenon may occur on the driving module 400. At this time, the opening degree of the auxiliary electronic expansion valve 610 is adjusted in time, so that the temperature of the driving module 400 is adjusted to prevent the temperature thereof from further decreasing and thus generating the condensation phenomenon.
  • the safe temperature is in a range of 50°C to 75°C, inclusive. That is, in a case where the temperature of the driving module 400 is greater than 75°C, it is determined that the temperature of the driving module 400 is too high, which may cause burning and damage of the driving module 400. At this time, the opening degree of the auxiliary electronic expansion valve 610 is adjusted in time, so that the temperature of the driving module 400 is adjusted to prevent the temperature thereof from further increasing and thus cause burning and damage of the driving module 400.
  • temperature sensor and a target temperature value is set to continuously feedback the temperature of the driving module 400 through a PID control method.
  • the opening degree of the auxiliary electronic expansion valve 610 is continuously adjusted, the amount of refrigerant circulating in the refrigerant pipe 200 is increased or decreased, and the temperature of the driving module 400 is continuously adjusted.
  • the temperature of the driving module 400 is stable within the safe temperature range.
  • the heat exchange block 100 and the heat conduction member 300 may adopt an integrated structure to transfer the heat between the driving modules 400, so that the temperatures of the driving modules 400 are more balanced, thereby effectively preventing the condensation problem due to the low temperature of the driving module, and ensuring the normal operation of the driving module 400.
  • the driving module 400 proximate to an inlet of the cooling circulation branch 600 is controlled to drive the compressor 550 corresponding to the driving module 400 to operate.
  • the compressor 550 at the inlet is controlled to be operated, so that when the refrigerant passes through the compressor 550, the temperature of the refrigerant is increased through heat exchange, and when the refrigerant passes through the following driving module 400 that is not operating, the temperature of the driving module 400 that is not operating will not be decreased, which prevents the condensation phenomenon.
  • a plurality of driving modules 400 proximate to the inlet of the cooling circulation branch 600 are controlled to drive the plurality of compressors 550 to operate.
  • the plurality of driving modules 400 proximate to the inlet of the cooling circulation branch 600 are controlled to operate in sequence. For example, if two compressors 550 need to be operated, a first driving module and a second driving module 400 closest to the inlet of the cooling circulation branch 600 may be controlled to operate.
  • the temperature of the refrigerant is increased, so as to ensure that the temperature of the driving module 400 that is not operating will not be too low when the refrigerant passes through the driving module 400 that is not operating, thereby preventing the condensation phenomenon of the driving module 400.
  • the target temperature is set and the temperature of the driving module 400 is adjusted according to the aforementioned control method, so that the temperature of the driving module 400 is stabilized at the target temperature, thereby ensuring that the temperature of the driving module 400 will neither be too high nor too low.
  • control method provided by the embodiments of the present disclosure is also applicable to the outdoor unit of the mono-compressor 550.
  • the first preset temperature is in a range of 2°C to 5°C, inclusive. That is, in a case where the temperature difference between the temperature of the driving module 400 and the ambient temperature is less than the first preset temperature, it is determined that the condensation phenomenon may occur on the driving module 400. At this time, the opening degree of the auxiliary electronic expansion valve 610 is adjusted in time, so that the temperature of the driving module 400 is adjusted to prevent the temperature thereof from further decreasing and thus generating the condensation phenomenon.
  • the safe temperature is in a range of 50°C to 75°C, inclusive. That is, in a case where the temperature of the driving module 400 is greater than 75°C, it is determined that the temperature of the driving module 400 is too high, which may cause burning and damage of the driving module 400. At this time, the opening degree of the auxiliary electronic expansion valve 610 is adjusted in time, so that the temperature of the driving module 400 is adjusted to prevent the temperature thereof from further increasing and thus cause burning and damage of the driving module 400.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
  • Air Conditioning Control Device (AREA)

Claims (8)

  1. Außeneinheit einer Klimaanlage, dadurch gekennzeichnet, dass die Außeneinheit einer Klimaanlage
    ein Gehäuse, in dem wenigstens zwei Kompressoren (550) bereitgestellt sind;
    wenigstens zwei Antriebsmodule (400), wobei jedes der wenigstens zwei Antriebsmodule (400) entsprechend einen der Kompressoren (550) antreibt;
    Wärmeaustauschblöcke (100), wobei jedes Antriebsmodul (400) auf eine wärmeleitende Weise an einen entsprechenden Wärmeaustauschblock (100) der Wärmeaustauschblöcke (100) angeschlossen ist; und
    ein Kältemittelrohr (200), in dem sich ein Kältemittel befindet, wobei das Kältemittelrohr (200) in die Wärmeaustauschblöcke (100) eingesetzt ist und die Wärmeaustauschblöcke (100) kühlen kann,
    aufweist wobei
    zwei benachbarte Wärmeaustauschblöcke (100) durch ein Wärmeleitelement (300) verbunden sind und das Wärmeleitelement (300) so eingerichtet ist, dass es zwischen den beiden benachbarten Wärmeaustauschblöcken (100) Wärme überträgt; und das Wärmeleitelement (300) und die beiden benachbarten Wärmeaustauschblöcke (100) aus einem gleichen Material bestehen und in einer Einheit ausgeführt sind,
    dadurch gekennzeichnet, dass
    jeder Wärmeaustauschblock (100) eine Fixierplatte (110) und zwei wärmeleitende Abschnitte (120), die auf der Fixierplatte (110) und an Rändern an zwei Seiten der Fixierplatte (110) in der Längsrichtung angeordnet sind, aufweist, in einem jeden wärmeleitenden Abschnitt (120) eine Durchgangsöffnung (121) in einer Längsrichtung der Fixierplatte (110) bereitgestellt ist, das Kältemittelrohr (200) in die Durchgangsöffnung (121) eingesetzt ist, die Fixierplatte (110) mit einem entsprechenden Antriebsmodul (400) verbunden ist, und die Fixierplatte (110) und die beiden wärmeleitenden Abschnitte (120) aus einem gleichen Material bestehen und in einer Einheit ausgeführt sind;
    das Wärmeleitelement (300) einen gleichen Aufbau wie der Wärmeaustauschblock (100) aufweist, und eine Endfläche des Wärmeleitelements (300) fest mit einer Endfläche eines dazu benachbarten Wärmeaustauschblocks (100) verbunden ist;
    das Antriebsmodul (400) auf einem Schaltungssubstrat (410) angeordnet ist, die Fixierplatte (110) fest an dem Schaltungssubstrat (410) angebracht ist, und das Schaltungssubstrat (410) eine Kühlkapazität des Kältemittels zu dem Antriebsmodul (400) übertragen kann, um eine Temperatur des Antriebsmoduls (400) zu verringern;
    eine Außenwand des Kältemittelrohrs (200) durch Aufweiten des Kältemittelrohrs (200) fest an einer Innenwand der Durchgangsöffnung (121) angebracht ist; und
    das Kältemittelrohr (200) ein U-förmiges Rohr ist und zwei gerade Rohrabschnitte des U-förmigen Rohrs in Durchgangsöffnungen (121) in den beiden wärmeleitenden Abschnitten (120) eingesetzt sind.
  2. Außeneinheit einer Klimaanlage nach Anspruch 1, dadurch gekennzeichnet, dass das Kältemittelrohr (200) ein Kupferrohr ist.
  3. Außeneinheit einer Klimaanlage nach den Ansprüchen 1 oder 2, dadurch gekennzeichnet, dass der Wärmeaustauschblock (100) aus Aluminium besteht.
  4. Verfahren zum Steuern eines Kreislaufsystems für die Außeneinheit einer Klimaanlage nach einem der Ansprüche 1 bis 3, wobei das Kreislaufsystem einen Unterkühlungs-Wärmeaustauscher (510), ein elektronisches Hauptexpansionsventil (520), einen Außenwärmeaustauscher (530) und ein Vierwegeventil (540), die in der Außeneinheit angeordnet sind und durch eine Hauptkreislauf-Flüssigkeitsleitung (500) der Reihe nach miteinander in Verbindung stehen, aufweist; wobei die Hauptkreislauf-Flüssigkeitsleitung (500) mit einer Inneneinheit in Verbindung steht; wobei das Vierwegeventil (540) ferner mit einem Kompressor (550) und einem Gas-Flüssigkeits-Abscheider (560) verbunden ist, der Kompressor (550) mit dem Gas-Flüssigkeits-Abscheider (560) in Verbindung steht, und der Gas-Flüssigkeits-Abscheider (560) mit dem Unterkühlungs-Wärmeaustauscher (510) in Verbindung steht; und an der Hauptkreislauf-Flüssigkeitsleitung (500) ein Kühlkreislaufzweig (600) bereitgestellt ist, der Kühlkreislaufzweig (600) mit dem Kältemittelrohr (200) in Verbindung steht, und an dem Kühlkreislaufzweig (600) ein elektronisches Hilfsexpansionsventil (610) bereitgestellt ist,
    dadurch gekennzeichnet, dass
    in jedem der Antriebsmodule (400) ein Temperatursensor bereitgestellt ist, und der Temperatursensor verwendet wird, um eine Temperatur des Antriebsmoduls (400) zu detektieren, und
    das Steuerungsverfahren
    ein Überwachen der Temperatur des Antriebsmoduls (400) durch den Temperatursensor und ein Festlegen einer Zieltemperatur, wobei die Zieltemperatur innerhalb eines sicheren Temperaturbereichs liegt, und dann ein Einstellen eines elektronischen Hilfsexpansionsventils (610), um die Temperatur des Antriebsmoduls (400) bei der Zieltemperatur zu stabilisieren; und
    ein Erhöhen eines voreingestellten Temperaturwerts der Zieltemperatur, wenn detektiert wird, dass ein Temperaturunterschied zwischen der Temperatur des Antriebsmoduls (400) und einer Umgebungstemperatur geringer als eine erste voreingestellte Temperatur ist, damit ein Öffnungsgrad des elektronischen Hilfsexpansionsventils (610) verringert wird, eine Menge des Kältemittels, das in dem Kältemittelrohr (200) zirkuliert, verringert wird, eine Temperatur des Antriebsmoduls (400), bei dem detektiert wurde, dass der Temperaturunterschied geringer als die erste voreingestellte Temperatur ist, erhöht wird, und der Temperaturunterschied zwischen der Temperatur des Antriebsmoduls (400) und der Umgebungstemperatur größer als die erste voreingestellte Temperatur ist,
    umfasst.
  5. Steuerungsverfahren nach Anspruch 4, dadurch gekennzeichnet, dass bei einer Detektion, dass die Temperatur des Antriebsmoduls (400) höher als die Zieltemperatur ist, der Öffnungsgrad des elektronischen Hilfsexpansionsventils (610) vergrößert wird und die Menge des Kältemittels, das in dem Kältemittelrohr (200) zirkuliert, erhöht wird, damit die Temperatur des Antriebsmoduls (400), bei dem detektiert wurde, dass die Temperatur höher als die Zieltemperatur ist, verringert wird, und die Temperatur des Antriebsmoduls (400) bei der Zieltemperatur stabilisiert wird.
  6. Steuerungsverfahren nach Anspruch 5, dass dann, wenn nur einer unter allen Kompressoren (550) betrieben werden muss, ein Antriebsmodul (400) in der Nähe eines Einlasses des Kühlkreislaufzweigs (600) gesteuert wird, um einen Kompressor (550), der dem Antriebsmodul (400) entspricht, so anzutreiben, dass dieser arbeitet.
  7. Steuerungsverfahren nach Anspruch 5, dadurch gekennzeichnet, dass dann, wenn mehrere Kompressoren (550) unter allen Kompressoren (550) betrieben werden müssen, mehrere Antriebsmodule (400) in der Nähe eines Einlasses des Kühlkreislaufzweigs (600) gesteuert werden, um die mehreren Kompressoren (550), die den mehreren Antriebsmodulen (400) entsprechen, so anzutreiben, dass diese der Reihe nach arbeiten.
  8. Steuerungsverfahren nach Anspruch 5, dadurch gekennzeichnet, dass die erste voreingestellte Temperatur in einem Bereich von 2 °C bis inklusive 5 °C liegt;
    die sichere Temperatur in einem Bereich von 50 °C bis inklusive 75 °C liegt.
EP19948665.5A 2019-10-12 2019-11-12 Ausseneinheit einer klimaanlage und steuerungsverfahren Active EP4043809B1 (de)

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CN201910970017.2A CN112648685A (zh) 2019-10-12 2019-10-12 一种空调器室外机、循环系统以及控制方法
CN201921707838.9U CN210772502U (zh) 2019-10-12 2019-10-12 一种空调器室外机
CN201921706951.5U CN210801418U (zh) 2019-10-12 2019-10-12 一种用于空调器的冷媒散热组件以及空调器
CN201910970156.5A CN110762788A (zh) 2019-10-12 2019-10-12 一种空调器室外机、循环系统以及控制方法
CN201921706388.1U CN210801417U (zh) 2019-10-12 2019-10-12 一种用于空调室外机的散热组件以及空调器
PCT/CN2019/117285 WO2021068327A1 (zh) 2019-10-12 2019-11-12 一种空调器室外机及控制方法

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CN114543384A (zh) * 2021-12-24 2022-05-27 青岛海尔空调电子有限公司 空调器
CN115574380A (zh) * 2022-09-26 2023-01-06 青岛海尔空调电子有限公司 换热器、分区控制方法、装置和空调器

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KR102283905B1 (ko) * 2014-12-30 2021-08-02 엘지전자 주식회사 공기 조화기의 실외기
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