CN115479328A - Refrigerant circulation system, air conditioning equipment and control method of refrigerant circulation system - Google Patents
Refrigerant circulation system, air conditioning equipment and control method of refrigerant circulation system Download PDFInfo
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- CN115479328A CN115479328A CN202211301238.9A CN202211301238A CN115479328A CN 115479328 A CN115479328 A CN 115479328A CN 202211301238 A CN202211301238 A CN 202211301238A CN 115479328 A CN115479328 A CN 115479328A
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 100
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000004378 air conditioning Methods 0.000 title claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 230000001105 regulatory effect Effects 0.000 claims description 18
- 230000003247 decreasing effect Effects 0.000 claims description 12
- 108700041286 delta Proteins 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 8
- 230000033228 biological regulation Effects 0.000 claims description 7
- 230000001276 controlling effect Effects 0.000 claims description 4
- 239000002826 coolant Substances 0.000 claims 4
- 238000001816 cooling Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000005057 refrigeration Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/14—Heat exchangers specially adapted for separate outdoor units
- F24F1/16—Arrangement or mounting thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention relates to a refrigerant circulating system, air conditioning equipment and a control method of the refrigerant circulating system, wherein the refrigerant circulating system comprises: a compressor (2) including an exhaust port for outputting compressed refrigerant and a suction port for introducing refrigerant to be compressed; an outdoor unit including a first heat exchanger (4) connected to one of the discharge port and the suction port and an electric component assembly (7); a second heat exchanger (6) connected to the other of the exhaust port and the suction port and to the first heat exchanger (4), one of the second heat exchanger (6) and the first heat exchanger (4) serving as a condenser and the other serving as an evaporator; and a third heat exchanger (8) configured to exchange heat with the electrical component assembly (7), the third heat exchanger (8) being configured to be connected to an exhaust port of the compressor (2) to introduce a refrigerant for heating the electrical component assembly (7) when the second heat exchanger (6) is used as a condenser.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to a refrigerant circulating system, air conditioning equipment and a control method of the refrigerant circulating system.
Background
In the operation process of the air conditioning unit, the internal temperature of the electric appliance box is influenced by the working heat of internal components and also by the outdoor environment temperature. In the cooling season, the temperature of the outer ring is high, and the internal temperature of the electrical box is in a higher temperature state under the influence of the heating of the components and the outdoor temperature; in the heating season, the outer ring temperature is low, and even if the components are heated, the components are affected by the outdoor ring temperature, and the internal temperature is low. Too high or too low a temperature can affect the operating life of the electrical components. Therefore, in order to enable the components inside the electric box to work in a proper temperature environment, the electric box mainly adopts an air cooling or refrigerant heat exchange pipeline to dissipate heat, but when the temperature of the electric box is lower in a heating season, the electronic components in the electric box are at a lower temperature, and the service life of the electronic components is also influenced.
Disclosure of Invention
The invention aims to provide a refrigerant circulating system, air conditioning equipment and a control method of the refrigerant circulating system, so as to solve the problem that the service life is influenced by the lower temperature of an electric appliance box in the heating season in the prior art.
According to an aspect of an embodiment of the present invention, there is provided a refrigerant circulation system including:
the compressor comprises an exhaust port for outputting compressed refrigerant and a suction port for introducing the refrigerant to be compressed;
an outdoor unit including a first heat exchanger and an electric component assembly connected to one of the discharge port and the suction port;
a second heat exchanger connected to the other of the exhaust port and the suction port and connected to the first heat exchanger, one of the second heat exchanger and the first heat exchanger serving as a condenser and the other serving as an evaporator;
and a third heat exchanger configured to exchange heat with an electrical element of the electrical element assembly, the third heat exchanger being configured to be connected to an exhaust port of the compressor to introduce a refrigerant for heating the electrical element assembly when the second heat exchanger is used as a condenser.
In some embodiments, the third heat exchanger is configured to be connected to the second heat exchanger when the second heat exchanger is used as an evaporator, so as to introduce the refrigerant evaporated in the second heat exchanger to cool the electrical components.
In some embodiments, the refrigerant cycle system further comprises a control valve including an inlet connected to the discharge port of the compressor, a first working port connected to the first heat exchanger, an outlet connected to the suction port of the compressor, and a second working port connected to the second heat exchanger.
In some embodiments, the third heat exchanger is located between the second working port and the second heat exchanger in the circulation direction of the refrigerant.
In some embodiments, the refrigerant circulation system further includes a bypass line bypassing the refrigerant line connecting the second working port and the second heat exchanger, and the third heat exchanger is disposed in the bypass line.
In some embodiments, the third heat exchanger includes a first port connected to the second heat exchanger and a second port connected to the second working port, one of the first port and the second port is used for introducing a refrigerant that exchanges heat with the electrical component, and the other is used for outputting the refrigerant that exchanges heat with the electrical component.
In some embodiments, the third heat exchanger comprises a first port connected with the second heat exchanger, a second port connected with the second working port, and a plurality of heat exchange tubes connected in parallel, wherein one ends of the plurality of heat exchange tubes are respectively connected with the first port, and the other ends of the plurality of heat exchange tubes are respectively connected with the second port.
In some embodiments, the heat exchange tubes of the third heat exchanger extend from the first port to the second port of the third heat exchanger on the refrigerant flow path.
In some embodiments, the refrigerant circulation system further includes a flow rate adjustment component connected to the third heat exchanger for adjusting a flow rate of the refrigerant flowing through the third heat exchanger.
In some embodiments, the refrigerant circulation system further includes:
a temperature detection part configured to detect a temperature td of the electrical component assembly;
a controller in signal connection with the temperature detection component and the flow regulation component respectively and configured to:
when the second heat exchanger is used as an evaporator, the opening degree of the flow rate adjusting part is increased if the temperature td of the electric element assembly is greater than a first predetermined temperature tds, and the opening degree of the flow rate adjusting part is decreased if the temperature td of the electric element assembly is less than a second predetermined temperature tdx; and/or
When the second heat exchanger is used as a condenser, the opening degree of the flow rate adjusting part is increased if the temperature td of the electric element assembly < the second predetermined temperature tdx, and the opening degree of the flow rate adjusting part is decreased if the temperature td of the electric element assembly > the first predetermined temperature tds,
wherein the first predetermined temperature tds > the second predetermined temperature tdx.
According to another aspect of the present invention, an air conditioning apparatus is also provided, and the air conditioning apparatus includes the refrigerant circulation system.
According to another aspect of the present invention, there is also provided a control method of the above refrigerant circulation system, the control method including:
obtaining the temperature of the electrical component assembly and judging whether the second heat exchanger is used as an evaporator or a condenser;
when the second heat exchanger is used as an evaporator, the opening degree of the flow rate adjusting part is increased if the temperature td of the electric element assembly is greater than a first predetermined temperature tds, and the opening degree of the flow rate adjusting part is decreased if the temperature td of the electric element assembly is less than a second predetermined temperature tdx; and/or
When the second heat exchanger is used as a condenser, the opening degree of the flow rate adjusting part is increased if the temperature td of the electric element assembly < the second predetermined temperature tdx, and the opening degree of the flow rate adjusting part is decreased if the temperature td of the electric element assembly > the first predetermined temperature tds,
wherein the first predetermined temperature tds > the second predetermined temperature tdx.
In some embodiments, when the second heat exchanger functions as an evaporator, increasing the opening degree of the flow rate adjustment part includes:
if the opening degree of the flow regulating component is 0, regulating the opening degree of the flow regulating component to a first preset opening degree deltac; or
If the opening degree of the flow rate adjustment member is greater than 0, the opening degree of the flow rate adjustment member is increased by a first increase Δ δ 1.
In some embodiments, when the second heat exchanger functions as a condenser, increasing the opening degree of the flow rate adjustment part includes:
if the opening degree of the flow regulating component is 0, regulating the opening degree of the flow regulating component to a second preset opening degree delta h;
if the opening degree of the flow rate adjustment member is greater than 0, the opening degree of the flow rate adjustment member is increased by a first increase Δ δ 1.
By applying the technical scheme of the application, when the first heat exchanger is used as the evaporator and the second heat exchanger is used as the condenser, the third heat exchanger can introduce a high-temperature refrigerant compressed by the compressor to heat the electrical component assembly, so that the problem that the temperature of the electrical component assembly is lower and the service life is influenced when the first heat exchanger is used as the evaporator and the second heat exchanger is used as the condenser in the heating season in the prior art is solved.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a refrigerant circulation system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram illustrating an electrical box and a third heat exchanger of a refrigerant cycle system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram illustrating an electrical box and an optional third heat exchanger of the refrigerant cycle system according to the embodiment of the invention; and
fig. 4 is a control flowchart of the refrigerant circulation system according to the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
Referring to fig. 1 and 2, the refrigerant circulation system of the present embodiment includes a compressor 2, an outdoor unit having a first heat exchanger 4 and an electric component assembly 7, a second heat exchanger 6, and a third heat exchanger 8.
The compressor 2 includes an exhaust port for outputting a compressed refrigerant and a suction port for introducing the refrigerant to be compressed. The outdoor unit includes a first heat exchanger 4 connected to one of the discharge port and the suction port, and an electric component assembly 7. The second heat exchanger 6 is connected to the other of the exhaust port and the suction port and to the first heat exchanger 4, and one of the second heat exchanger 6 and the first heat exchanger 4 functions as a condenser and the other functions as an evaporator. The third heat exchanger 8 is configured to exchange heat with the electrical component assembly 7, the third heat exchanger 8 being configured to: and is connected to the discharge port of the compressor 2 to introduce a refrigerant for heating the electric component assembly 7 when the second heat exchanger 6 is used as a condenser.
In the present embodiment, when the first heat exchanger 4 is used as an evaporator and the second heat exchanger 6 is used as a condenser, the third heat exchanger 8 can introduce a high-temperature refrigerant compressed by the compressor 1 to heat the electrical component assembly 7, so that the problem that the service life is affected due to the low temperature of the electrical component assembly when the first heat exchanger 4 is used as an evaporator and the second heat exchanger 6 is used as a condenser in the heating season in the prior art is solved.
In some embodiments, the electrical component assembly 7 includes an electrical box and electrical components located within the electrical box.
In the present embodiment, the second heat exchanger 6 is an indoor heat exchanger of an air conditioner. In other embodiments, the second heat exchanger 6 is a heat exchanger of a heat pump water heater for heating water.
In this embodiment, the third heat exchanger 8 is further configured to be connected to the second heat exchanger 6 when the second heat exchanger 6 is used as an evaporator, so as to introduce the refrigerant evaporated in the second heat exchanger 6 to cool the electrical components, thereby preventing the temperature of the electrical components from being too high, and being beneficial to prolonging the service life of the electrical components.
The refrigerant circulation system further comprises a control valve 3, and the control valve 3 comprises an inlet 31 connected with the exhaust port of the compressor 2, a first working port 32 connected with the first heat exchanger 4, an outlet 33 connected with the suction port of the compressor 2, and a second working port 34 connected with the second heat exchanger 6.
The control valve 3 has a first state and a second state. When the control valve is in the first state, the inlet 31 of the control valve 3 is communicated with the first working port 32, the second working port 34 is communicated with the outlet 33, the refrigerant compressed by the compressor 2 enters the first heat exchanger 4 to be condensed, the refrigerant condensed in the first heat exchanger 4 enters the second heat exchanger 6 after being throttled, and the refrigerant returns to the suction port of the compressor 2 after being evaporated in the second heat exchanger 6, so that when the control valve 3 is in the first state, the first heat exchanger 4 serves as a condenser, and the second heat exchanger 6 serves as an evaporator.
When the control valve is in the second state, the inlet 31 of the control valve 3 is communicated with the second working port 34, the first working port 32 is communicated with the outlet 33, the refrigerant compressed by the compressor 2 enters the second heat exchanger 6 to be condensed, the refrigerant condensed in the second heat exchanger 6 enters the first heat exchanger 4 after being throttled, and the refrigerant returns to the suction port of the compressor 2 after being evaporated in the first heat exchanger 4, so that when the control valve 3 is in the second state, the second heat exchanger 6 serves as a condenser, and the first heat exchanger 4 serves as an evaporator.
The refrigerant circulation system further comprises a throttling part 5 arranged in a pipeline between the first heat exchanger 4 and the second heat exchanger 6. The refrigerant circulating system also comprises a gas-liquid separator 1, wherein the inlet of the gas-liquid separator 1 is communicated with the outlet 33 of the control valve 3, and the outlet of the gas-liquid separator 1 is communicated with the suction port of the compressor 2.
The third heat exchanger 8 is located between the second working port 34 and the second heat exchanger 6 in the flow direction of the refrigerant. When the first heat exchanger 4 is used as a condenser and the second heat exchanger 6 is used as an evaporator, the temperature of the outdoor unit is high, and the refrigerant evaporated in the second heat exchanger 6 can enter the third heat exchanger 8 to cool the electrical component assembly 7. When the first heat exchanger 4 is used as an evaporator and the second heat exchanger 6 is used as a condenser, the outdoor unit temperature is low, and the high-temperature refrigerant output from the discharge port of the compressor 2 can flow to the third heat exchanger 8 through the second working port 34, so as to raise the temperature of the electric components of the electric component assembly 7.
The refrigerant circulating system comprises a bypass pipeline which bypasses a refrigerant pipeline connecting the second working port 34 and the second heat exchanger 6, and the third heat exchanger 8 is arranged in the bypass pipeline.
The third heat exchanger 8 includes a first port 81 connected to the second heat exchanger 6 and a second port 82 connected to the second working port 34, one of the first port 81 and the second port 82 is used for introducing a refrigerant that exchanges heat with an electrical component, and the other is used for outputting the refrigerant that exchanges heat with the electrical component.
As shown in fig. 2, in the present embodiment, the heat exchange tube of the third heat exchanger 8 extends from the first port 81 to the second port 82 of the third heat exchanger 8 on the refrigerant flow path. The heat exchange tubes of the third heat exchanger 8 are arranged in series between the first port 81 and the second port 82.
In other embodiments, as shown in fig. 3, the third heat exchanger 8 comprises a first port 81 connected to the second heat exchanger 6, a second port 82 connected to the second working port 34, and a plurality of heat exchange tubes connected in parallel, one end of each of the plurality of heat exchange tubes being connected to the first port 81, and the other end of each of the plurality of heat exchange tubes being connected to the second port 82.
The surface S1 formed by the refrigerant pipes of the third heat exchanger 8 is parallel to the maximum section S2 of the electrical component assembly 7, and the area of S1 is maximized to be close to the area of the maximum section S2 of the electrical component assembly.
The internal routing flow path of the third heat exchanger 8 may take an in-and-out form, as shown in FIG. 2; multiple in and multiple out versions may also be used, as shown in fig. 3.
The refrigerant circulation system further includes a flow rate adjustment unit 9 connected to the third heat exchanger 8 and configured to adjust a flow rate of the refrigerant flowing through the third heat exchanger 8. In some embodiments, the flow regulating member 9 is disposed in a bypass line that bypasses the refrigerant line connecting the second working port 34 and the second heat exchanger 6.
The refrigerant circulating system also comprises a temperature detection part and a controller. The temperature detection means is configured to detect the temperature td of the electrical element assembly 7.
The controller is in signal connection with the temperature detection component and the flow regulation component 9 respectively and is configured to: when the second heat exchanger 6 is used as an evaporator, the opening degree of the flow rate adjusting means 9 is increased if the temperature td of the electric element assembly 7 > the first predetermined temperature tds, and the opening degree of the flow rate adjusting means 9 is decreased if the temperature td of the electric element assembly 7 < the second predetermined temperature tdx; and/or, when the second heat exchanger 6 is used as a condenser, the opening degree of the flow rate adjusting means 9 is increased if the temperature td of the electric element assembly 7 < the second predetermined temperature tdx, and the opening degree of the flow rate adjusting means 9 is decreased if the temperature td of the electric element assembly 7 > the first predetermined temperature tds, wherein the first predetermined temperature tds > the second predetermined temperature tdx.
According to another aspect of the present invention, an air conditioning apparatus is also provided, and the air conditioning apparatus includes the refrigerant circulation system.
According to another aspect of the present invention, there is also provided a method for controlling a refrigerant circulation system, the method comprising:
obtaining the temperature of the electrical component assembly 7 and the second heat exchanger 6 to be used as an evaporator or a condenser;
when the second heat exchanger 6 is used as an evaporator, the opening degree of the flow rate adjusting means 9 is increased if the temperature td of the electric element assembly 7 > the first predetermined temperature tds, and the opening degree of the flow rate adjusting means 9 is decreased if the temperature td of the electric element assembly 7 < the second predetermined temperature tdx; and/or
When the second heat exchanger 6 is used as a condenser, the opening degree of the flow rate adjusting means 9 is increased when the temperature td of the electric element assembly 7 is less than the second predetermined temperature tdx, the opening degree of the flow rate adjusting means 9 is decreased when the temperature td of the electric element assembly 7 > the first predetermined temperature tds,
wherein the first predetermined temperature tds > the second predetermined temperature tdx. The electric component assembly 7 is correspondingly provided with a temperature detection component to detect the temperature Td of the electric component assembly. The temperature of the electrical element assembly 7 has a safety range, namely tdx ≦ td ≦ tds, the upper temperature limit of the temperature range is tds, and the lower temperature limit of the temperature range is tdx.
In some embodiments, when the second heat exchanger 6 functions as an evaporator, increasing the opening degree of the flow rate adjustment part 9 includes:
if the opening degree of the flow rate adjusting part 9 is 0, adjusting the opening degree of the flow rate adjusting part 9 to a first preset opening degree deltac; or
If the opening degree of the flow rate adjustment member 9 is greater than 0, the opening degree of the flow rate adjustment member 9 is increased by a first increase Δ δ 1.
Referring to fig. 1 to 4, in particular, when the refrigerant cycle system is in a cooling mode, the first heat exchanger 4 serves as a condenser, the second heat exchanger 6 serves as an evaporator, the inlet 31 of the control valve 3 is communicated with the first working port 32, and the outlet 33 is communicated with the second working port 34. High-temperature and high-pressure refrigerant enters a first heat exchanger 4 through a compressor 2, is condensed through a control valve 3, is subcooled through a throttling component 5, enters a second heat exchanger 6 and is evaporated, the refrigerant is in a low-pressure and low-temperature state at the moment, the refrigerant is divided into two paths, the first path enters a gas-liquid separator 1 through a second working port 34 and an outlet 33, then enters the gas suction side of the compressor, and is compressed and discharged by the compressor; the second path enters the third heat exchanger 8 through the first port 81 of the third heat exchanger 8, cools the temperature of the electrical component assembly 7, enters the second working port 34 through the second port 802 of the third heat exchanger 8 via the flow regulating component 9, joins with the first path of refrigerant, and enters the second working port 34.
When the refrigerant circulating system is in a refrigeration mode, the heat dissipation of the components is large in the working state, and the temperature of the electrical component assembly 7 is high. When Td is larger than tds, the opening degree of the throttling regulating component 9 is in a 0 state, initialization regulation is needed, the throttling component is started to regulate to an initial opening degree deltac, and after t time operation, whether Td falls into a safety range or not is detected. If the adjusting component is in a state other than 0, the opening degree of the throttling component is adjusted in an increasing mode of delta 1, and after the operation is carried out for t time, whether Td falls into a safety range or not is detected. And when Td is less than tdx, the opening degree of the throttling component is adjusted by the amplitude of delta 2, and after the operation is carried out for t time, whether Td falls into a safety range or not is detected. This is repeated until Td is maintained within the safe range.
In some embodiments, when the second heat exchanger 6 functions as a condenser, increasing the opening degree of the flow rate adjusting member 9 includes:
if the opening degree of the flow rate adjusting part 9 is 0, adjusting the opening degree of the flow rate adjusting part 9 to a second preset opening degree δ h;
if the opening degree of the flow rate adjustment member 9 is greater than 0, the opening degree of the flow rate adjustment member 9 is increased by a first increase Δ δ 1.
Specifically, when the refrigerant cycle system is in the heating mode, the first heat exchanger 4 serves as an evaporator, the second heat exchanger 6 serves as a condenser, the inlet 31 is communicated with the second working port 34, and the first working port 32 is communicated with the outlet 33. The high-temperature and high-pressure refrigerant enters the second working port 34 through the compressor 2 and then is divided into two paths, the first path enters the second heat exchanger 6 for condensation, then enters the first heat exchanger 4 for evaporation through the other end of the second heat exchanger 6 through the throttling component 5, returns to the gas-liquid separator 1 through the first working port 32 and the outlet 33, then enters the gas suction side of the compressor, and is compressed and discharged by the compressor; the second path enters the third heat exchanger 8 through the flow regulating component 9 and the second port 82 of the third heat exchanger, heats the internal temperature of the electrical component, and then joins the first path of refrigerant with the first port 81 of the third heat exchanger 8 to enter the second heat exchanger 6.
When the refrigerant circulation system is in a heating mode, the third heat exchanger 8 needs to be started for adjustment when the temperature of the electrical component assembly 7 is too low due to low outdoor environment temperature. When Td is less than tdx, the opening degree of the throttling regulating component 9 is in a 0 state, initialization regulation is needed, the throttling component is started to regulate to an initial opening degree delta h, and after t time, whether Td falls into a safety range is detected; and if the adjusting component is in a non-0 state, the opening degree of the throttling component is adjusted in an increasing mode of delta 1, and after the operation is carried out for t time, whether td falls into a safety range or not is detected. And when td is larger than tds, the opening degree of the throttling component is adjusted by the reduction amplitude of delta 2, and after the operation for t time, whether td falls into a safety range is detected. And the process is circulated until td is maintained within a safe range.
The technical scheme of the embodiment realizes the following technical effects:
1. an air conditioning system structure capable of adjusting the temperature of an electrical component assembly is provided.
2. The third heat exchanger 8 correspondingly arranged on the electrical component assembly 7 is arranged on a pipeline between the second heat exchanger 6 and the second working port of the control valve 3, and is in a low-pressure and low-temperature state in a refrigeration mode, so that the electrical component assembly 7 can be cooled; the heating mode is in a high-pressure and high-temperature state, and the heating of the electrical component assembly 7 can be realized.
3. A flow rate adjusting member 9 is provided between the control valve 3 and a third heat exchanger 8 provided in correspondence with the electrical component assembly 7. Under the refrigeration mode, a refrigerant for cooling the temperature of the electrical component assembly firstly passes through the interior of the electrical component assembly and then passes through the flow regulating component, so that the regulation of heat exchange quantity can be realized, and low-temperature condensation caused by throttling can be avoided under the refrigeration mode; under the mode of heating, the refrigerant that is used for heating electrical components subassembly temperature carries out the throttle cooling through flow control part earlier, can realize the regulation of heat transfer volume equally, also can avoid exhausting high temperature to lead to the inside high temperature of heat exchanger simultaneously.
4. The surface formed by the refrigerant running pipe of the third heat exchanger correspondingly arranged on the device element component is parallel to the maximum section of the electrical device element component, and the area of the third heat exchanger is close to the maximum section area of the electrical device element component to the maximum extent, so that the effect of maximum heat exchange in a closed space is achieved.
The present invention is not limited to the above exemplary embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (14)
1. A refrigerant circulation system, comprising:
the compressor (2) comprises an exhaust port for outputting compressed refrigerant and an air suction port for introducing the refrigerant to be compressed;
an outdoor unit including a first heat exchanger (4) connected to one of the discharge port and the suction port and an electric component assembly (7);
a second heat exchanger (6) connected to the other of the exhaust port and the suction port and to the first heat exchanger (4), one of the second heat exchanger (6) and the first heat exchanger (4) functioning as a condenser and the other functioning as an evaporator;
a third heat exchanger (8) configured to exchange heat with an electrical element within the electrical element assembly (7), the third heat exchanger (8) being configured to be connected to an exhaust port of the compressor (2) to introduce a refrigerant for heating the electrical element assembly (7) when the second heat exchanger (6) is used as a condenser.
2. The coolant circulation system according to claim 1, wherein the third heat exchanger (8) is configured to be connected to the second heat exchanger (6) when the second heat exchanger (6) is used as an evaporator, so as to introduce the coolant evaporated in the second heat exchanger (6) to cool the electrical components.
3. The refrigerant cycle system according to claim 1, further comprising a control valve (3), wherein the control valve (3) comprises an inlet (31) connected to the discharge port of the compressor (2), a first working port (32) connected to the first heat exchanger (4), an outlet (33) connected to the suction port of the compressor (2), and a second working port (34) connected to the second heat exchanger (6).
4. The refrigerant circulation system according to claim 3, wherein the third heat exchanger (8) is located between the second working port (34) and the second heat exchanger (6) in a flow direction of the refrigerant.
5. The refrigerant cycle system as set forth in claim 3, further comprising a bypass line bypassing a refrigerant line connecting the second working port (34) and the second heat exchanger (6), wherein the third heat exchanger (8) is disposed in the bypass line.
6. The refrigerant circulation system according to claim 3, wherein the third heat exchanger (8) includes a first port (81) connected to the second heat exchanger (6) and a second port (82) connected to the second working port (34), one of the first port (81) and the second port (82) is configured to introduce the refrigerant exchanging heat with the electrical component, and the other one is configured to output the refrigerant exchanging heat with the electrical component.
7. The refrigerant circulation system as claimed in claim 1, wherein the third heat exchanger (8) comprises a first port (81) connected with the second heat exchanger (6), a second port (82) connected with the second working port (34), and a plurality of heat exchange tubes connected in parallel, one ends of the plurality of heat exchange tubes are respectively connected with the first port (81), and the other ends of the plurality of heat exchange tubes are respectively connected with the second port (82).
8. The refrigerant circulation system as claimed in claim 1, wherein the heat exchange tubes of the third heat exchanger (8) extend in a refrigerant flow path from a first port (81) to a second port (82) of the third heat exchanger (8).
9. The coolant circulation system according to claim 1 or 2, further comprising a flow rate adjusting unit (9) connected to the third heat exchanger (8) for adjusting a flow rate of the coolant flowing through the third heat exchanger (8).
10. The refrigerant circulation system as claimed in claim 9, further comprising:
a temperature detection part configured to detect a temperature td of the electrical component assembly (7);
a controller in signal connection with the temperature detection component and the flow regulation component (9), respectively, and configured to:
when the second heat exchanger (6) is used as an evaporator, the opening degree of the flow rate adjusting member (9) is increased if the temperature td of the electric element assembly (7) is greater than a first predetermined temperature tds, and the opening degree of the flow rate adjusting member (9) is decreased if the temperature td of the electric element assembly (7) is less than a second predetermined temperature tdx; and/or
When the second heat exchanger (6) is used as a condenser, the opening degree of the flow rate adjustment means (9) is increased when the temperature td of the electric element assembly (7) is less than a second predetermined temperature tdx, and the opening degree of the flow rate adjustment means (9) is decreased when the temperature td of the electric element assembly (7) is greater than a first predetermined temperature tds,
wherein the first predetermined temperature tds > the second predetermined temperature tdx.
11. An air conditioning apparatus, characterized by comprising the refrigerant circulation system according to any one of claims 1 to 10.
12. A method for controlling a refrigerant cycle system as claimed in any one of claims 1 to 10, comprising:
obtaining the temperature of the electrical component assembly (7) and judging that the second heat exchanger (6) is used as an evaporator or a condenser;
when the second heat exchanger (6) is used as an evaporator, the opening degree of the flow rate adjustment means (9) is increased if the temperature td of the electric element assembly (7) is greater than a first predetermined temperature tds, and the opening degree of the flow rate adjustment means (9) is decreased if the temperature td of the electric element assembly (7) is less than a second predetermined temperature tdx; and/or
When the second heat exchanger (6) is used as a condenser, the opening degree of the flow rate adjusting means (9) is increased if the temperature td of the electric element assembly (7) is less than a second predetermined temperature tdx, and the opening degree of the flow rate adjusting means (9) is decreased if the temperature td of the electric element assembly (7) is greater than a first predetermined temperature tds,
wherein the first predetermined temperature tds > the second predetermined temperature tdx.
13. The method for controlling a refrigerant cycle system according to claim 12, wherein the increasing the opening degree of the flow rate adjusting member (9) when the second heat exchanger (6) is used as an evaporator includes:
if the opening degree of the flow regulating component (9) is 0, regulating the opening degree of the flow regulating component (9) to a first preset opening degree deltac; or
If the opening degree of the flow rate adjustment member (9) is greater than 0, the opening degree of the flow rate adjustment member (9) is increased by a first increase delta 1.
14. The method of controlling a refrigerant cycle system according to claim 12, wherein the increasing the opening degree of the flow rate adjusting member (9) when the second heat exchanger (6) is used as a condenser comprises:
if the opening degree of the flow regulating component (9) is 0, regulating the opening degree of the flow regulating component (9) to a second preset opening degree delta h;
if the opening degree of the flow rate adjustment member (9) is greater than 0, the opening degree of the flow rate adjustment member (9) is increased by a first increase delta 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211301238.9A CN115479328A (en) | 2022-10-24 | 2022-10-24 | Refrigerant circulation system, air conditioning equipment and control method of refrigerant circulation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211301238.9A CN115479328A (en) | 2022-10-24 | 2022-10-24 | Refrigerant circulation system, air conditioning equipment and control method of refrigerant circulation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115479328A true CN115479328A (en) | 2022-12-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211301238.9A Pending CN115479328A (en) | 2022-10-24 | 2022-10-24 | Refrigerant circulation system, air conditioning equipment and control method of refrigerant circulation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115479328A (en) |
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2022
- 2022-10-24 CN CN202211301238.9A patent/CN115479328A/en active Pending
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