CN112611027A - Air conditioning system and control method thereof - Google Patents
Air conditioning system and control method thereof Download PDFInfo
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- CN112611027A CN112611027A CN202110008732.5A CN202110008732A CN112611027A CN 112611027 A CN112611027 A CN 112611027A CN 202110008732 A CN202110008732 A CN 202110008732A CN 112611027 A CN112611027 A CN 112611027A
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- compressor
- air conditioning
- conditioning system
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 38
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 25
- 239000007788 liquid Substances 0.000 claims description 15
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 238000010257 thawing Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 10
- 230000017525 heat dissipation Effects 0.000 description 12
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- LVGUZGTVOIAKKC-UHFFFAOYSA-N 1,1,1,2-tetrafluoroethane Chemical compound FCC(F)(F)F LVGUZGTVOIAKKC-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
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Classifications
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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
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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
- F24F1/46—Component arrangements in separate outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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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
-
- 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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
Abstract
The invention relates to an air conditioning system and a control method of the air conditioning system, which comprises an outdoor heat exchanger, an indoor heat exchanger, a compressor, an expansion valve, a first valve, a second valve, a first heat release component and a second heat release component for heating the outdoor heat exchanger, a temperature measurement sensor for measuring the surface temperature of an outdoor sensor and a control module, wherein the first heat release component and the second heat release component are respectively connected with the outdoor heat exchanger; the outlet of the compressor is connected with the first valve and the second valve, the first valve and the second valve are respectively connected with the first heat-releasing component and the second heat-releasing component, the first heat-releasing component and the second heat-releasing component are both connected with the inlet of the compressor, and the control module can control the on-off state of the first valve and the second valve according to the test result of the temperature measuring sensor. The air conditioning system can solve the problem that the air conditioning system is difficult to balance the defrosting effect and the heating efficiency, so that the air conditioning system can safely defrost the outdoor heat exchanger and can maintain higher heating efficiency.
Description
Technical Field
The invention belongs to the technical field of heat exchange equipment, and particularly relates to an air conditioning system and a control method of the air conditioning system.
Background
The air conditioning system can force heat to flow from a low temperature medium to a high temperature medium in a reverse circulation manner, and can obtain a large heat supply amount by consuming a small amount of electric energy, so that the air conditioning system is generally used as a heating device in winter. The existing air conditioning system mainly includes an outdoor heat exchanger, an indoor heat exchanger, a compressor, an expansion valve, and a heat releasing member for heating the outdoor heat exchanger. When the air conditioning system performs heating operation, a part of heat exchange medium flows into the heat release component from the outlet of the compressor and heats the outdoor heat exchanger, which helps to avoid that the surface temperature of the outdoor heat exchanger is lower than the dew point temperature of air due to continuous heat absorption of the heat exchange medium in the outdoor heat exchanger, thereby reducing the possibility of frosting of the outdoor heat exchanger to maintain the heating efficiency of the air conditioning system. Because the total amount of the heat exchange medium in the air conditioning system is constant, the flow rate of the heat exchange medium flowing into the heat-radiating component is inversely related to the flow rate of the heat exchange medium flowing into the outdoor heat exchanger, which leads to that the defrosting effect of the air conditioning system on the outdoor heat exchanger is better, and the heating efficiency of the air conditioning system on the indoor is poorer, and for this reason, the existing air conditioning system improves the defrosting effect of the air conditioning system on the outdoor heat exchanger in a mode of sacrificing some heating efficiency, namely improves the heating efficiency of the air conditioning system on the indoor in a mode of sacrificing some defrosting effect, and cannot balance the defrosting effect and the heating efficiency of the air conditioning system at all.
Disclosure of Invention
In order to solve all or part of the above problems, an object of the present invention is to provide an air conditioning system and a control method of the air conditioning system, both of which are used to solve the problem that it is difficult to balance the defrosting effect and the heating efficiency of the air conditioning system, so that the air conditioning system can safely defrost an outdoor heat exchanger and can maintain a higher heating efficiency.
According to a first aspect of the present invention, there is provided an air conditioning system comprising: the system comprises an outdoor heat exchanger, an indoor heat exchanger, a compressor, an expansion valve, a first valve, a second valve, a first heat release component for heating the outdoor heat exchanger, a second heat release component for heating the outdoor heat exchanger, a temperature measurement sensor for measuring the surface temperature of the outdoor sensor, and a control module electrically connected with the first valve, the second valve and the temperature measurement sensor; the compressor is used for compressing heat exchange media, an outlet of the compressor is connected with a first interface of the indoor heat exchanger, a second interface of the indoor heat exchanger is connected with a first interface of the expansion valve, a second interface of the expansion valve is connected with a second interface of the outdoor heat exchanger, and the first interface of the outdoor heat exchanger is connected with an inlet of the compressor; the outlet of the compressor is also connected with the inlet of the first valve and the inlet of the second valve, the outlet of the first valve and the outlet of the second valve are respectively connected with the inlet of the first heat-releasing component and the inlet of the second heat-releasing component, the outlet of the first heat-releasing component and the outlet of the second heat-releasing component are both connected with the inlet of the compressor, and the control module can control the on-off state of the first valve and the second valve according to the test result of the temperature measuring sensor.
Furthermore, the air conditioning system further comprises a third heat release component for heating the outdoor heat exchanger and a third valve electrically connected with the control module, an outlet of the compressor is further connected with an inlet of the third valve, an outlet of the third valve is connected with an inlet of the third heat release component, an outlet of the third heat release component is also connected with an inlet of the compressor, and the control module is electrically connected with the third valve and can control the on-off state of the third valve according to a test result of the temperature measuring sensor.
The first heat dissipation member is a first heat dissipation plate with a serpentine channel, the second heat dissipation member is a second heat dissipation plate with a serpentine channel, the third heat dissipation member is a third heat dissipation plate with a serpentine channel, and the first heat dissipation plate, the second heat dissipation plate and the third heat dissipation plate are of an integrated structure and are attached to the outdoor heat exchanger.
Further, the air conditioning system further comprises a gas-liquid separator, a gas-liquid inlet of the gas-liquid separator is connected with the first interface of the outdoor heat exchanger, the outlet of the first heat-releasing component, the outlet of the second heat-releasing component and the outlet of the third heat-releasing component, and a gas outlet of the gas-liquid separator is connected with the inlet of the compressor.
The air conditioning system further comprises a two-position four-way reversing valve, wherein a first interface, a second interface, a third interface and a fourth interface of the two-position four-way reversing valve are respectively connected with the first interface of the outdoor heat exchanger, the inlet of the compressor, the first interface of the indoor heat exchanger and the outlet of the compressor, the two-position four-way reversing valve can be controlled to be switched between a first working state and a second working state, and when the two-position four-way reversing valve is in the first working state, the two-position four-way reversing valve can allow the first interface of the outdoor heat exchanger to be connected with the inlet of the compressor and can also allow the outlet of the compressor to be connected with the first interface of the indoor heat exchanger; when the two-position four-way reversing valve is in a second working state, the two-position four-way reversing valve can allow the outlet of the compressor to be connected with the first interface of the outdoor heat exchanger and can also allow the first interface of the indoor heat exchanger to be connected with the inlet of the compressor.
According to a second aspect of the present invention, there is provided a control method of an air conditioning system according to the first aspect of the present invention, the control method comprising:
judging the magnitude relation between a temperature measurement value obtained by a temperature measurement sensor of the air conditioning system and a first threshold value, a second threshold value and a third threshold value, wherein the first threshold value, the second threshold value and the third threshold value are sequentially decreased;
if the temperature measurement value is larger than a first threshold value, closing a first valve, a second valve and a third valve which are opened in the air conditioning system;
if the temperature measurement value is greater than the second threshold value and less than or equal to the first threshold value, opening the first valve;
if the temperature measurement value is greater than the third threshold value and less than or equal to the second threshold value, opening the first valve and the second valve;
and if the temperature measured value is less than or equal to the third threshold value, opening the first valve, the second valve and the third valve.
Further, the control method of the air conditioning system further comprises the step of judging the magnitude relation between the temperature measurement value obtained by the temperature measurement sensor of the air conditioning system and the first threshold value, the second threshold value and the third threshold value every time a set time interval passes.
Further, the selection range of the set time interval is 10-15 s.
Further, the first threshold value is any value between 0 ℃ and-5 ℃, the second threshold value is any value between-5 ℃ and-10 ℃, and the third threshold value is any value between-8 ℃ and-15 ℃.
It can be seen from the above technical solutions that the air conditioning system according to the first aspect of the present invention at least adds the number of heat releasing components and the temperature measuring sensor to the existing air conditioning system, and each heat releasing component is provided with a valve, so that the air conditioning system of the first aspect of the invention and the control method of the air conditioning system of the second aspect of the invention can obtain the surface temperature of the outdoor heat exchanger by means of the temperature measuring sensor, and reasonably control the on-off quantity of the valves according to the surface temperature of the outdoor heat exchanger, so as to reduce the degree of the compressor excessively providing heat exchange medium to each heat releasing component while meeting the requirement of safe defrosting, ensure that the compressor can send more heat exchange medium to the indoor heat exchanger, so as to maintain the air conditioning system to have higher heating efficiency, thereby solving the problem that the air conditioning system is difficult to balance the defrosting effect and the heating efficiency. In addition, the air conditioning system is simple in structure, easy to assemble, safe and reliable to use, and convenient to implement, popularize and apply.
Drawings
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the figure:
fig. 1 is a schematic structural diagram of an air conditioning system according to an embodiment of the present invention.
In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
Detailed Description
The invention will be further explained with reference to the drawings.
Fig. 1 is a schematic structural diagram of an air conditioning system 100 according to an embodiment of the present invention. As shown in fig. 1, an air conditioning system 100 according to an embodiment of the present invention mainly includes an outdoor heat exchanger 1, an indoor heat exchanger 2, a compressor 3, an expansion valve 4, a first valve 5, a second valve 6, a first heat releasing member 8 for heating the outdoor heat exchanger 1, a second heat releasing member 9 for heating the outdoor heat exchanger 1, a temperature measuring sensor for measuring a surface temperature of the outdoor sensor, and a control module electrically connected to the first valve 5, the second valve 6, and the temperature measuring sensor. The compressor 3 is used for compressing heat exchange medium, an outlet of the compressor is connected with a first interface 2a of the indoor heat exchanger 2, a second interface 2b of the indoor heat exchanger 2 is connected with a first interface 4a of the expansion valve 4, a second interface 4b of the expansion valve 4 is connected with a second interface 1b of the outdoor heat exchanger 1, and the first interface 1a of the outdoor heat exchanger 1 is connected with an inlet 3b of the compressor 3. The heat exchange medium can be compressed by the compressor 3, then the compressed and heated heat exchange medium is input into the indoor heat exchanger 2, the heat exchange medium is forced to be liquefied and released heat in the indoor heat exchanger 2, heat is supplied to the indoor, the liquefied heat exchange medium enters the outdoor heat exchanger 1 after being decompressed by the expansion valve 4, absorbs heat in the outdoor heat exchanger 1 and evaporates, heat in outdoor air is obtained, and the heat returns to the inlet 3b of the compressor 3. The outlet 3a of the compressor 3 is also connected with the inlet 5a of the first valve 5 and the inlet 6a of the second valve 6, the outlet 5b of the first valve 5 and the outlet 6b of the second valve 6 are respectively connected with the inlet of the first heat-releasing component 8 and the inlet of the second heat-releasing component 9, the outlet of the first heat-releasing component 8 and the outlet of the second heat-releasing component 9 are both connected with the inlet 3b of the compressor 3, and the control module can control the on-off state of the first valve 5 and the second valve 6 according to the test result of the temperature measuring sensor. The first valve 5 and the second valve 6 are preferably solenoid valves having an on-off function. The heat exchange medium is preferably but not limited to freon, ammonia or tetrafluoroethane and the like.
When the first valve 5 is in an open state, it can allow the heat exchange medium compressed by the compressor 3 to pass through and enter the first heat releasing member 8, and liquefy and release heat in the first heat releasing member 8, thereby warming the outdoor heat exchanger 1. When the second valve 6 is in the open state, it can allow the heat exchange medium compressed by the compressor 3 to pass through and enter the second heat releasing member 9, and liquefy and release heat in the second heat releasing member 9, thereby warming the outdoor heat exchanger 1. Wherein, the indoor heat exchanger 2 can be selected as a box type, a tube type, a plate type and other different types of condensers. The outdoor heat exchanger 1 can be selected from various types of radiators such as box type radiators, pipe type radiators and plate type radiators. The control module may include a programmable logic control unit (such as a PLC or CPU), a memory, and an electronic component connected to the programmable logic control unit, etc., which are well known to those skilled in the art and will not be described in detail herein.
In the present embodiment, the air conditioning system 100 may further include a third heat releasing member 10 for heating the outdoor heat exchanger 1 and a third valve 7 electrically connected to the control module. The outlet 3a of the compressor 3 is also connected with the inlet 7a of the third valve 7, the outlet 7b of the third valve 7 is connected with the inlet of the third heat-releasing component 10, the outlet of the third heat-releasing component 10 is also connected with the inlet 3b of the compressor 3, and the control module is electrically connected with the third valve 7 and can control the on-off state of the third valve 7 according to the test result of the temperature measuring sensor. The third valve 7 is preferably a solenoid valve with an on-off function.
According to the technical scheme, the air conditioning system 100 of the embodiment of the invention is at least provided with the number of heat releasing components and the temperature measuring sensors on the basis of the existing air conditioning system, and each heat releasing component is provided with one valve, so that the control module of the air conditioning system 100 can obtain the surface temperature of the outdoor heat exchanger 1 by means of the temperature measuring sensors and reasonably control the on-off number of the valves according to the surface temperature of the outdoor heat exchanger 1, the requirement of safe defrosting is met, the degree that the compressor 3 excessively provides heat exchange media for each heat releasing component is reduced, more heat exchange media can be fed into the indoor heat exchanger 2 by the compressor 3, the air conditioning system 100 is maintained to have higher heating efficiency, and the problem that the defrosting effect and the heating efficiency of the air conditioning system are difficult to balance is solved. In addition, the air conditioning system is simple in structure, easy to assemble, safe and reliable to use, and convenient to implement, popularize and apply.
In the present embodiment, the first heat radiation member 8 is preferably a first heat radiation plate having a serpentine passage. The second heat releasing member 9 is preferably a second heat dissipating plate having a serpentine passage. The third heat releasing member 10 is preferably a third heat releasing plate having a serpentine passage. The first heat dissipation plate, the second heat dissipation plate and the third heat dissipation plate can be of a split structure or an integrated structure. In this embodiment, first heating panel, second heating panel and third heating panel formula structure as an organic whole and with the laminating of outdoor heat exchanger 1, can make first heating panel, second heating panel and third heating panel better to the heating effect of outdoor heat exchanger 1 when making things convenient for first heating panel, second heating panel and third heating panel to be assembled on outdoor heat exchanger 1 from this.
In the present embodiment, the air conditioning system 100 further includes a gas-liquid separator 11. A gas-liquid inlet 11a of the gas-liquid separator 11 is connected to the first connection port 1a of the outdoor heat exchanger 1, the outlet of the first heat releasing member 8, the outlet of the second heat releasing member 9, and the outlet of the third heat releasing member 10. The gas outlet 11b of the gas-liquid separator 11 is connected to the inlet 3b of the compressor 3. This enables the gas-liquid separator 11 to receive the heat exchange medium output from the outlet of the first heat releasing member 8, the outlet of the second heat releasing member 9, and the outlet of the third heat releasing member 10 and to prevent the heat exchange medium in a liquid state from entering the compressor 3, thereby reducing the risk of the compressor 3 malfunctioning due to the liquid entering the compressor 3 and improving the safety of the air conditioning system 100.
In this embodiment, the air conditioning system 100 also includes a two-position, four-way reversing valve 12. The first interface 12a, the second interface 12b, the third interface 12c and the fourth interface 12d of the two-position four-way reversing valve 12 are sequentially connected with the first interface 1a of the outdoor heat exchanger 1, the inlet 3b of the compressor 3, the first interface 2a of the indoor heat exchanger 2 and the outlet 3a of the compressor 3. When the two-position four-way reversing valve 12 is in the first working state, it can allow the first port 1a of the outdoor heat exchanger 1 to be connected with the inlet 3b of the compressor 3, and can also allow the outlet 3a of the compressor 3 to be connected with the first port 2a of the indoor heat exchanger 2. The air conditioning system 100 provides heat to the room at this time. When the two-position four-way reversing valve 12 is in the second working state, it can allow the outlet 3a of the compressor 3 to be connected with the first port 1a of the outdoor heat exchanger 1, and can also allow the first port 2a of the indoor heat exchanger 2 to be connected with the inlet 3b of the compressor 3. The air conditioning system 100 is now able to extract heat from the room and reduce the room temperature.
Next, a control method of the air conditioning system 100 will be described, which mainly includes step 1, step 2, step 3, step 4, and step 5. Wherein, step 1 mainly includes: and judging the magnitude relation between the temperature measurement value obtained by the temperature measurement sensor of the air conditioning system 100 and a first threshold, a second threshold and a third threshold, wherein the first threshold, the second threshold and the third threshold are sequentially decreased progressively. The step 2 mainly comprises the following steps: if the temperature measurement is greater than the first threshold, the first valve 5, the second valve 6, and the third valve 7 that are opened in the air conditioning system 100 are closed. Step 3 mainly comprises: if the temperature measurement is greater than the second threshold and less than or equal to the first threshold, the first valve 5 is opened. Step 4 mainly comprises: if the temperature measurement is greater than the third threshold and less than or equal to the second threshold, the first valve 5 and the second valve 6 are opened. Step 5 mainly comprises: if the temperature measurement is less than or equal to the third threshold, the first valve 5, the second valve 6, and the third valve 7 are opened. That is to say, the control method can obtain the surface temperature of the outdoor heat exchanger by means of the temperature measuring sensor, and reasonably control the on-off quantity of the valves according to the surface temperature of the outdoor heat exchanger, so as to reduce the degree that the compressor 3 excessively provides heat exchange media for each heat releasing component when the requirement of safe defrosting is met, ensure that the compressor can feed more heat exchange media to the indoor heat exchanger, maintain the higher heating efficiency of the air conditioning system, and solve the problem that the defrosting effect and the heating efficiency of the air conditioning system are difficult to balance.
Preferably, the step 1 specifically includes determining the magnitude relationship between the temperature measurement value obtained by the temperature sensor of the air conditioning system 100 and the first threshold, the second threshold, and the third threshold every time a set time interval elapses. The set time interval may be selected in combination with factors such as the temperature and humidity of the use environment and the power of each heat-releasing member, and is preferably set to any value of 10s to 15s, so as to ensure that each heat-releasing member can heat the outdoor heat exchanger 1 in time. The first threshold, the second threshold and the third threshold may be selected according to the temperature and humidity of the environment and the power of each heat releasing component. However, in the present embodiment, the first threshold value is preferably any value from 0 ℃ to-5 ℃. The second threshold value is preferably any value from-5 ℃ to-10 ℃. The third threshold value is preferably any value from-8 ℃ to-15 ℃. The threshold range ensures that the air conditioning system 100 is more suitable for use in northern cold areas of China.
In the description of the present application, it is to be understood that the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily make changes or variations within the technical scope of the present invention disclosed, and such changes or variations should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims. The technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. An air conditioning system is characterized by comprising an outdoor heat exchanger, an indoor heat exchanger, a compressor, an expansion valve, a first valve, a second valve, a first heat release component for heating the outdoor heat exchanger, a second heat release component for heating the outdoor heat exchanger, a temperature measurement sensor for measuring the surface temperature of the outdoor sensor, and a control module electrically connected with the first valve, the second valve and the temperature measurement sensor; the compressor is used for compressing heat exchange media, an outlet of the compressor is connected with a first interface of the indoor heat exchanger, a second interface of the indoor heat exchanger is connected with a first interface of the expansion valve, a second interface of the expansion valve is connected with a second interface of the outdoor heat exchanger, and the first interface of the outdoor heat exchanger is connected with an inlet of the compressor; the outlet of the compressor is also connected with the inlet of the first valve and the inlet of the second valve, the outlet of the first valve and the outlet of the second valve are respectively connected with the inlet of the first heat-releasing component and the inlet of the second heat-releasing component, the outlet of the first heat-releasing component and the outlet of the second heat-releasing component are both connected with the inlet of the compressor, and the control module can control the on-off state of the first valve and the second valve according to the test result of the temperature measuring sensor.
2. The air conditioning system according to claim 1, further comprising a third heat releasing component for heating the outdoor heat exchanger and a third valve electrically connected to the control module, wherein the outlet of the compressor is further connected to the inlet of the third valve, the outlet of the third valve is connected to the inlet of the third heat releasing component, the outlet of the third heat releasing component is also connected to the inlet of the compressor, and the control module is electrically connected to the third valve and is capable of controlling the on-off state of the third valve according to the test result of the temperature measuring sensor.
3. The air conditioning system according to claim 2, wherein the first heat releasing member is a first heat releasing plate having a serpentine passage, the second heat releasing member is a second heat releasing plate having a serpentine passage, the third heat releasing member is a third heat releasing plate having a serpentine passage, and the first heat releasing plate, the second heat releasing plate, and the third heat releasing plate are of an integrated structure and are attached to the outdoor heat exchanger.
4. The air conditioning system according to claim 2, further comprising a gas-liquid separator, wherein a gas-liquid inlet of the gas-liquid separator is connected to the first port of the outdoor heat exchanger, the outlet of the first heat releasing member, the outlet of the second heat releasing member, and the outlet of the third heat releasing member, and a gas outlet of the gas-liquid separator is connected to the inlet of the compressor.
5. The air conditioning system of claim 2, further comprising a two-position four-way reversing valve, wherein the first, second, third and fourth ports of the two-position four-way reversing valve are respectively connected to the first port of the outdoor heat exchanger, the inlet of the compressor, the first port of the indoor heat exchanger and the outlet of the compressor, the two-position four-way reversing valve can be controlled to switch between a first working state and a second working state, and when the two-position four-way reversing valve is in the first working state, the two-position four-way reversing valve can allow the first port of the outdoor heat exchanger to be connected to the inlet of the compressor and can also allow the outlet of the compressor to be connected to the first port of the indoor heat exchanger; when the two-position four-way reversing valve is in a second working state, the two-position four-way reversing valve can allow the outlet of the compressor to be connected with the first interface of the outdoor heat exchanger and can also allow the first interface of the indoor heat exchanger to be connected with the inlet of the compressor.
6. The air conditioning system of claim 2, wherein the first valve, the second valve, and the third valve are solenoid valves having an on-off function.
7. A control method of an air conditioning system according to any one of claims 2 to 6, characterized by comprising:
judging the magnitude relation between a temperature measurement value obtained by a temperature measurement sensor of the air conditioning system and a first threshold value, a second threshold value and a third threshold value, wherein the first threshold value, the second threshold value and the third threshold value are sequentially decreased;
if the temperature measurement value is larger than a first threshold value, closing a first valve, a second valve and a third valve which are opened in the air conditioning system;
if the temperature measurement value is greater than the second threshold value and less than or equal to the first threshold value, opening the first valve;
if the temperature measurement value is greater than the third threshold value and less than or equal to the second threshold value, opening the first valve and the second valve;
and if the temperature measured value is less than or equal to the third threshold value, opening the first valve, the second valve and the third valve.
8. The control method of claim 7, further comprising determining a magnitude relationship between a temperature measurement value obtained by a temperature sensor of the air conditioning system and the first threshold value, the second threshold value, and the third threshold value every time a set time interval elapses.
9. The control method according to claim 8, wherein the set time interval is selected in a range of 10s to 15 s.
10. The control method according to any one of claims 7 to 9, characterized in that the first threshold value is any value from 0 ℃ to-5 ℃, the second threshold value is any value from-5 ℃ to-10 ℃, and the third threshold value is any value from-8 ℃ to-15 ℃.
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