CN111043723A - Air conditioner and control method thereof - Google Patents
Air conditioner and control method thereof Download PDFInfo
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- CN111043723A CN111043723A CN201911393861.XA CN201911393861A CN111043723A CN 111043723 A CN111043723 A CN 111043723A CN 201911393861 A CN201911393861 A CN 201911393861A CN 111043723 A CN111043723 A CN 111043723A
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000010438 heat treatment Methods 0.000 claims description 19
- 238000007791 dehumidification Methods 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 10
- 238000005057 refrigeration Methods 0.000 claims description 8
- 239000003507 refrigerant Substances 0.000 abstract description 69
- 239000007788 liquid Substances 0.000 description 9
- 238000009434 installation Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010977 unit operation Methods 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
- 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
- F24F11/50—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
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Abstract
The invention discloses an air conditioner and a control method thereof, wherein the air conditioner comprises: the system comprises a four-way valve, an outdoor heat exchanger, a first throttling element, an indoor heat exchanger and a compressor, wherein the four-way valve, the outdoor heat exchanger, the first throttling element and the indoor heat exchanger are sequentially connected and form a loop; the air conditioner further includes: a heat balance assembly, a first end of the heat balance assembly being connected to the indoor heat exchanger and the four-way valve, a second end of the heat balance assembly being connected to the outdoor heat exchanger and the throttling element, the heat balance assembly comprising: a switch and a second throttling element connected to each other. The flow distribution of the refrigerant in the air conditioner is adjusted by the heat balance component in a shunting way, so that the problem that the exhaust temperature is too high or the exhaust pressure is too high due to the small refrigerant circulation volume of the air conditioner is effectively solved, and the reliability of the unit is improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner and a control method thereof.
Background
In recent years, with the increasing standard of living, air conditioners are used more and more widely in homes.
In actual engineering installation of the air conditioner, the air conditioner may have a small quantity of refrigerants or a large quantity of refrigerants, and particularly, the lengths of the pipes of the indoor unit and the outdoor unit of the multi-split air conditioner are basically more than 60m, so that the air conditioner is very easy to have the small quantity of refrigerants or the large quantity of refrigerants. If the engineering installation is not standard, the heat exchange condition of the outdoor unit is not good, and the protection of overhigh exhaust pressure is easy to occur during high-load operation; when the engine runs under a small load, the circulation volume of the refrigerant is small due to the overlong pipeline, and the protection of overhigh exhaust temperature is easy to occur; in addition, due to the large-displacement compressor, when the air conditioner is in a small load state, even if the compressor is operated at the lowest operation frequency, the minimum output capacity of the compressor is far greater than the load requirement of the indoor unit, and at the moment, the exhaust temperature or the exhaust pressure is easily overhigh, so that the reliability of the unit is seriously influenced.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
The invention aims to provide an air conditioner and a control method thereof, and solves the problem that the air conditioner in the prior art has overhigh exhaust temperature or overhigh exhaust pressure caused by small refrigerant circulation volume.
The technical scheme adopted by the invention for solving the technical problem is as follows:
in a first aspect, an embodiment of the present invention provides an air conditioner, including: four-way valve, outdoor heat exchanger, first throttling element, indoor heat exchanger that connect gradually and form the return circuit, with the compressor that the four-way valve is connected, wherein, the air conditioner still includes: a heat balance assembly, a first end of which is connected with the indoor heat exchanger and the four-way valve, and a second end of which is connected with the outdoor heat exchanger and the first throttling element; the thermal balance assembly includes: a switch and a second throttling element connected to each other.
As a further improvement, the second throttling element is a capillary tube or an expansion valve.
As a further improved technical scheme, the switch is an electromagnetic valve.
As a further improvement, the switch is located at the first end or the second end of the thermal balance assembly.
In a second aspect, an embodiment of the present invention provides a method for controlling an air conditioner, where the air conditioner is the air conditioner described above;
the control method comprises the following steps:
acquiring an operation mode of the air conditioner;
and controlling the switch to be switched on according to the running mode.
As a further improved technical solution, the operation mode includes: a heating mode, a cooling mode and a dehumidifying mode;
the controlling the switch to be turned on according to the operation mode includes:
when the operation mode is a heating mode, controlling the switch to be opened according to the exhaust pressure of the compressor;
and when the operation mode is a refrigeration mode or a dehumidification mode, controlling the switch to be opened according to the discharge pressure of the compressor, the discharge temperature of the compressor or the discharge superheat degree of the compressor.
As a further improved technical solution, the controlling the switch to be turned on according to the discharge pressure of the compressor when the operation mode is a heating mode includes:
and when the operation mode is a heating mode, controlling the switch to be opened when the exhaust pressure of the compressor is greater than a first preset exhaust pressure.
As a further improved technical solution, when the operation mode is a cooling mode or a dehumidification mode, the controlling the switch to be opened according to the discharge pressure of the compressor or the discharge temperature of the compressor or the discharge superheat degree of the compressor includes:
and when the operation mode is a refrigeration mode or a dehumidification mode, controlling the switch to be opened when the exhaust pressure of the compressor is greater than a first preset exhaust pressure, or the exhaust temperature of the compressor is greater than a first preset exhaust temperature, or the exhaust superheat degree of the compressor is greater than a first preset exhaust superheat degree.
As a further improvement, the switch is turned on for the shortest turn-on time.
As a further improved technical scheme, the shortest opening time is 10s-60 s.
Compared with the prior art, the embodiment of the invention has the following advantages: by adding a heat balance assembly in the existing air conditioner, the first end of the heat balance assembly is connected with the indoor heat exchanger and the four-way valve, and the second end of the heat balance assembly is connected with the outdoor heat exchanger and the first throttling element. The flow distribution of the refrigerant in the air conditioner is adjusted by the heat balance component in a shunting way, so that the problem that the exhaust temperature is too high or the exhaust pressure is too high due to the small refrigerant circulation volume of the air conditioner is effectively solved, and the reliability of the unit is improved.
Drawings
Fig. 1 is a schematic view of the structure of an air conditioner according to the present invention.
Fig. 2 is a first flowchart of a control method of an air conditioner in the present invention.
Fig. 3 is a second flowchart of a control method of an air conditioner in the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The inventor researches and discovers that the length of the pipes of the indoor unit and the outdoor unit of the multi-split air conditioner is basically more than 60m in actual engineering installation, and the air conditioner can have a few refrigerants or a plurality of refrigerants. If the engineering installation is not standard, the heat exchange condition of the outdoor unit is not good, and the unit is in the process of small-load operation, on one hand, the problem of overhigh exhaust temperature is easy to occur due to the fact that the pipeline is too long and the circulation quantity of the refrigerant is too small, on the other hand, even if the large-discharge-capacity compressor operates at the lowest operation frequency, the minimum output capacity of the large-discharge-capacity compressor is far greater than the load requirement of the indoor unit, and at the moment, overhigh exhaust temperature or overhigh pressure is easy to occur, so that the.
In order to solve the above problems, in an embodiment of the present invention, a heat balance assembly including a switch and a second throttling element connected to each other is added to the existing air conditioner. If the switch is in an open state, the refrigerant passing through the outlet of the outdoor heat exchanger or the E end of the four-way valve is divided into two parts at the heat balance assembly, one part of the refrigerant flows to the branch where the indoor heat exchanger is located, the other part of the refrigerant flows to the branch where the heat balance assembly is located, and the two parts of the refrigerant are recombined at the other end of the heat balance assembly. Therefore, the distribution of the refrigerant in the air conditioner is adjusted by the thermal balance component in a shunting way, the problem that the exhaust temperature or the exhaust pressure of the air conditioner is overhigh is effectively solved, and the reliability of the air conditioner is improved.
The embodiment of the invention can be applied to the following scenes, and the air conditioner can acquire the operation mode of the air conditioner and transmit the operation mode of the air conditioner to the terminal, so that the terminal sends out an instruction for controlling the switch to be turned on according to the operation mode of the air conditioner and transmits the instruction to the air conditioner. And the air conditioner controls the switch to be turned on according to a control command sent by the terminal.
It will be appreciated that in the application scenarios described above, the actions of the embodiments of the present invention are described as being performed in part by the air conditioner and in part by the terminal. However, such actions may be entirely terminal or entirely performed by the air conditioner. The invention is not limited in its implementation to the details of execution, provided that the acts disclosed in the embodiments of the invention are performed. The terminal includes a desktop terminal or a mobile terminal, such as a desktop computer, a tablet computer, a notebook computer, a smart phone, and the like. The air conditioner can be a variable frequency air conditioner, a multi-split air conditioner and a variable frequency multi-split air conditioner.
It should be noted that the above application scenarios are only presented to facilitate understanding of the present invention, and the embodiments of the present invention are not limited in any way in this respect. Rather, embodiments of the present invention may be applied to any scenario where applicable.
Referring to fig. 1-3, the present invention provides embodiments of an air conditioner.
As shown in fig. 1, the air conditioner includes: the heat exchanger comprises a four-way valve 3, an outdoor heat exchanger 4, a first throttling element 5, an indoor heat exchanger 6, a compressor 1 and a heat balance assembly, wherein the four-way valve 3, the outdoor heat exchanger 4, the first throttling element 5 and the indoor heat exchanger 6 are sequentially connected and form a loop. The thermal balance assembly includes: a switch 8 and a second throttling element 9 connected to each other. A first end of the heat balance assembly is connected with the indoor heat exchanger 6 and the four-way valve 3, specifically, connected with a first end of the heat balance assembly at a point a of a pipe between the indoor heat exchanger 6 and the four-way valve 3; the second end of the heat balance assembly is connected to the outdoor heat exchanger 4 and the first throttling element 5, in particular to the second end of the heat balance assembly at point b of the tube between the outdoor heat exchanger 4 and the first throttling element 5. That is, a first end of the heat balance assembly is connected to a connection pipe of the indoor heat exchanger 6 and the E-port of the four-way valve 3, thereby achieving connection with the indoor heat exchanger 6 and the E-port of the four-way valve 3, and a second end of the heat balance assembly is connected to a connection pipe of the outdoor heat exchanger 4 and the first throttling element 5, thereby achieving connection with the outdoor heat exchanger 4 and the first throttling element 5.
According to the invention, the heat balance assembly is added in the existing air conditioner, when the exhaust temperature of a unit is abnormal or the high pressure of the air conditioner is overhigh, the flow distribution of the refrigerant of the air conditioner is adjusted by the heat balance assembly in a shunting way, so that the problem that the exhaust temperature is overhigh or the high pressure of the air conditioner is overhigh due to the fact that the refrigerant circulation volume of the air conditioner is small and the heat exchange capacity of an indoor unit and an outdoor unit is not matched when the air conditioner is operated under a small load is effectively solved, and the reliability of the air conditioner.
In one implementation manner of the embodiment of the present invention, the four-way valve 3 has 4 ports, which are an S-port, a D-port, an E-port and a C-port, respectively, the S-port of the four-way valve 3 is connected to an inlet of the compressor 1, specifically, the S-port of the four-way valve 3 is connected to the inlet of the compressor 1 through the gas-liquid separator 7; the D end of the four-way valve 3 is connected with the outlet of the compressor 1, and specifically, the D end of the four-way valve 3 is connected with the outlet of the compressor 1 through an oil separator 2; the E end of the four-way valve 3 is connected with the indoor heat exchanger 6; and the C end of the four-way valve 3 is connected with the outdoor heat exchanger 4.
An exhaust temperature sensor 11 is arranged at the outlet of the compressor 1, and the exhaust temperature sensor 11 is used for detecting the exhaust temperature of the compressor 1; the outlet of the oil separator 2 is provided with a discharge pressure sensor 10, and the discharge pressure sensor 10 is used for detecting the discharge pressure of the compressor 1.
In one implementation manner of the embodiment of the present invention, the switch 8 is located at the first end or the second end of the thermal balance assembly, that is, the switch 8 may be located at the first end of the thermal balance assembly, as shown in fig. 1 in particular; the positions of the switch 8 and the second restriction element 9 may also be reversed.
In one implementation manner of the embodiment of the present invention, the operation modes of the air conditioner include: a heating mode, a cooling mode, and a dehumidification mode. The flow direction of the refrigerant of the air conditioner is different in the cooling mode, the dehumidification mode and the heating mode. Specifically, in the refrigeration mode and the dehumidification mode, the end D of the four-way valve 3 is communicated with the end C, and the end E is communicated with the end S, so that the refrigerant in the compressor 1 sequentially passes through the outdoor heat exchanger 4, the first throttling element 5 and the indoor heat exchanger 6, and returns to the compressor 1 again. In the heating mode, the end D of the four-way valve 3 is communicated with the end S, and the end C is communicated with the end S, so that the refrigerant in the compressor 1 sequentially passes through the indoor heat exchanger 6, the first throttling element 5 and the outdoor heat exchanger 4, and returns to the compressor 1 again.
In different modes, the conditions required for opening the switch 8 are different, specifically as follows:
when the air conditioner is started and in a heating mode, the high-temperature high-pressure vaporous refrigerant output by the compressor 1 is condensed by the indoor heat exchanger 6 to release heat and then is changed into low-temperature high-pressure liquid refrigerant, then is subjected to pressure reduction by the first throttling element 5 to be changed into low-temperature low-pressure liquid refrigerant, is evaporated by the outdoor heat exchanger 4 to absorb heat and then is changed into low-temperature low-pressure vaporous refrigerant, and finally flows back to the compressor 1 to be compressed and then is changed into high-temperature high-pressure vaporous refrigerant.
When the switch 8 is in an open state, at this time, the pressure of the refrigerant in a high-temperature high-pressure vapor state at a position a is greater than the pressure of the refrigerant in a low-temperature low-pressure liquid state at a position b, the refrigerant coming out of the end E of the four-way valve 3 is divided into two parts at the position a of the heat balance assembly, one part of the refrigerant passes through the indoor heat exchanger 6, releases heat to indoor air and flows to the position b through the first throttling element 5, the other part of the refrigerant enters the branch where the heat balance assembly is located and respectively passes through the switch 8 and the second throttling element 9 of the heat balance assembly to reach the position b, the refrigerant in the high-temperature high-pressure vapor state at the position a is throttled and depressurized through the second throttling element 9 to form the refrigerant in the high-temperature low-pressure vapor state, the refrigerant is supplemented to. The two portions of the refrigerant are mixed at b, and the mixed refrigerant flows into the outdoor heat exchanger 4 to be evaporated and absorb heat, and then flows back to the compressor 1.
When the air conditioner is started and in a refrigeration mode or a dehumidification mode, the high-temperature and high-pressure vaporous refrigerant output by the compressor 1 is condensed and released heat by the outdoor heat exchanger 4 to become low-temperature and high-pressure liquid refrigerant, then is subjected to pressure reduction by the first throttling element 5 to become low-temperature and low-pressure liquid refrigerant, is evaporated and absorbed heat by the indoor heat exchanger 6 to become low-temperature and low-pressure vaporous refrigerant, and finally flows back to the compressor 1 to be compressed to become the high-temperature and high-pressure vaporous refrigerant.
When the switch 8 is in an open state, at this time, the pressure of the low-temperature high-pressure liquid refrigerant at the position b is greater than the pressure of the low-temperature low-pressure vapor refrigerant at the position a, the refrigerant coming out of the outdoor heat exchanger 4 is divided into two parts at the position b, one part of the refrigerant passes through the first throttling element 5 and the indoor heat exchanger 6, absorbs heat to indoor air and then reaches the position a, the other part of the refrigerant passes through the second throttling element 9 of the heat balance assembly and the switch 8 in sequence and then reaches the position a, and the low-temperature high-pressure liquid refrigerant at the position b is throttled and depressurized through the second throttling element 9 to form the low-temperature low-pressure liquid refrigerant. The two portions of the refrigerant are mixed at a, and the mixed refrigerant flows into the E end of the four-way valve 3 and returns to the compressor 1.
In the embodiment, the heat balance assembly is added in the existing air conditioner, when the air conditioner has overhigh exhaust temperature or overhigh exhaust pressure due to less refrigerant flow, the flow distribution of the refrigerant of the air conditioner is adjusted by the heat balance assembly in a shunting way, and the problem that the exhaust temperature or the exhaust pressure is overhigh due to the unmatched heat exchange capacity of the indoor unit and the outdoor unit when a small load operates is effectively solved, so that the reliability of the unit is improved.
Based on the air conditioner described in the above embodiment, as shown in fig. 2 and 3, the present invention provides a control method of the air conditioner provided in the above embodiment, the control method including the steps of:
and step S100, acquiring the operation mode of the air conditioner.
And judging the operation modes of the air conditioner, wherein the operation modes comprise a heating mode, a refrigerating mode and a dehumidifying mode, and are specifically as described above.
And step S200, controlling the switch 8 to be turned on according to the running mode.
When the operation mode of the air conditioner is the heating mode, the step S210 is performed; when the operation mode of the air conditioner is the cooling mode or the dehumidifying mode, the step S220 is performed; when the air conditioner operation mode is a heating mode, a cooling mode, or a mode other than a dehumidification mode, the switch 8 is kept in an off state.
And S210, controlling the switch to be opened according to the exhaust pressure of the compressor when the operation mode is a heating mode.
The method comprises the steps of detecting the exhaust pressure of a compressor 1 of the air conditioner in a heating mode, and controlling the switch 8 to be opened according to the exhaust pressure of the compressor 1.
When the air conditioner is in a heating mode and the air conditioner is operated under a small load, the operation load demand of the indoor heat exchanger 6 is much smaller than the minimum capacity output of the compressor 1. At this time, the discharge pressure of the compressor 1 at the present time is detected. When the exhaust pressure of the front compressor 1 is greater than the first preset pressure, the switch 8 is turned on, and the thermal balance shunt is in a conduction state. At this time, since the pressure of the refrigerant at the position a is greater than that of the refrigerant at the position b, the refrigerant coming out of the E end of the four-way valve 3 is divided into two parts at the position a, one part of the refrigerant passes through the indoor heat exchanger 6 to release heat to indoor air, the other part of the refrigerant enters the heat balance branch circuit, namely sequentially passes through the switch 8 and the second throttling element 9 of the heat balance assembly, the two parts of the refrigerant are mixed at the position b, and the mixed refrigerant flows into the outdoor heat exchanger 4.
And if the discharge pressure of the compressor is less than or equal to a second preset discharge pressure, closing the switch. The second preset exhaust pressure is smaller than the first preset exhaust pressure, the first preset exhaust pressure may be any suitable value, for example, 3.7MPa, and the second preset exhaust pressure may be any suitable value, for example, 3.2 MPa.
And S220, controlling the switch to be opened according to the discharge pressure of the compressor, the discharge temperature of the compressor or the discharge superheat degree of the compressor when the operation mode is a refrigeration mode or a dehumidification mode.
The method comprises the steps of detecting the discharge pressure of a compressor 1 or the discharge temperature of the compressor 1 or the discharge superheat degree of the compressor 1 when the air conditioner is in a refrigeration mode or a dehumidification mode, and controlling the switch 8 to be opened according to the discharge pressure of the compressor 1 or the discharge temperature of the compressor 1 or the discharge superheat degree of the compressor 1.
When the air conditioner is operated under a small load when the air conditioner is in a cooling mode or a dehumidifying mode, the operation load demand of the indoor heat exchanger 6 is much less than the minimum capacity output of the compressor 1. At this time, the exhaust temperature and the exhaust pressure of the current compressor 1 are detected, and an exhaust superheat degree (the exhaust superheat degree is a saturation temperature corresponding to the exhaust temperature-the exhaust pressure of the compressor 1) is calculated, and when the exhaust pressure of the current compressor 1 is greater than a first preset exhaust pressure, or the exhaust temperature of the compressor 1 is greater than a first preset exhaust temperature, or the exhaust superheat degree of the compressor 1 is greater than a first preset exhaust superheat degree, the switch 8 is turned on, and the thermal balance shunt is in a conduction state. At this time, since the pressure of the refrigerant at the b position is greater than that of the refrigerant at the a position, the refrigerant coming out of the outdoor heat exchanger 4 is divided into two parts at the b position, one part of the refrigerant passes through the indoor heat exchanger 6 to absorb heat to indoor air, the other part of the refrigerant enters the heat balance branch circuit and sequentially passes through the second throttling element 9 and the switch 8 of the heat balance assembly, the two parts of the refrigerant are mixed at the a position, and the mixed refrigerant flows into the end E of the four-way valve 3.
The first predetermined discharge pressure may be any suitable value, for example, 3.7 MPa; the first predetermined temperature may be any suitable value, such as 100 ℃; the first predetermined degree of superheat of the exhaust gas may be any suitable value, for example, 45 ℃.
And when the exhaust pressure is less than or equal to a second preset exhaust pressure, or the exhaust temperature is less than or equal to a second preset exhaust temperature, or the exhaust superheat degree is less than or equal to a second preset exhaust superheat degree, closing the switch. The second predetermined discharge pressure may be any suitable value, for example, 3.2 MPa; the second predetermined temperature may be any suitable value, such as 90 ℃, and the second predetermined degree of superheat of the exhaust gas may be any suitable value, such as 40 ℃.
The switch is opened for the shortest opening time which is 10-60 s, for example, the shortest opening time of the switch needs to meet 40s, namely the shortest opening time of the switch meets the closing condition (including that the exhaust pressure in a heating mode is less than or equal to a second preset exhaust pressure, the exhaust pressure in a cooling mode or a dehumidifying mode is less than or equal to the second preset exhaust pressure, or the exhaust temperature is less than or equal to a second preset exhaust temperature, or the exhaust superheat degree is less than or equal to the second preset exhaust superheat degree) when the opening time reaches 40s in the unit operation process, and the switch is allowed to be closed.
In summary, the present invention provides an air conditioner and a method for controlling an on/off switch thereof, wherein the air conditioner includes: the system comprises a four-way valve, an outdoor heat exchanger, a first throttling element, an indoor heat exchanger and a compressor, wherein the four-way valve, the outdoor heat exchanger, the first throttling element and the indoor heat exchanger are sequentially connected and form a loop; the air conditioner further includes: and a first end of the heat balance assembly is connected with the indoor heat exchanger and the four-way valve, and a second end of the heat balance assembly is connected with the outdoor heat exchanger and the first throttling element. The flow distribution of the refrigerant in the air conditioner is adjusted by the heat balance component in a shunting way, so that the problem that the exhaust temperature is too high or the exhaust pressure is too high due to the unmatched heat exchange capacities of the indoor unit and the outdoor unit when a small load operates is effectively solved, and the reliability of the unit is improved.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (10)
1. An air conditioner comprising: the system comprises a four-way valve, an outdoor heat exchanger, a first throttling element, an indoor heat exchanger and a compressor, wherein the four-way valve, the outdoor heat exchanger, the first throttling element and the indoor heat exchanger are sequentially connected and form a loop; characterized in that, the air conditioner still includes: a heat balance assembly, a first end of which is connected with the indoor heat exchanger and the four-way valve, and a second end of which is connected with the outdoor heat exchanger and the first throttling element; the thermal balance assembly includes: a switch and a second throttling element connected to each other.
2. The air conditioner of claim 1, wherein the second throttling element is a capillary tube or an expansion valve.
3. The air conditioner of claim 2, wherein said switch is a solenoid valve.
4. The air conditioner according to any one of claims 1 to 3, wherein the switch is located at the first end or the second end of the heat balance assembly.
5. A control method of an air conditioner, characterized in that the air conditioner is the air conditioner according to any one of claims 1 to 4;
the control method comprises the following steps:
acquiring an operation mode of the air conditioner;
and controlling the switch to be switched on according to the running mode.
6. The control method according to claim 5, wherein the operation mode includes: a heating mode, a cooling mode and a dehumidifying mode;
the controlling the switch to be turned on according to the operation mode includes:
when the operation mode is a heating mode, controlling the switch to be opened according to the exhaust pressure of the compressor;
and when the operation mode is a refrigeration mode or a dehumidification mode, controlling the switch to be opened according to the discharge pressure of the compressor, the discharge temperature of the compressor or the discharge superheat degree of the compressor.
7. The control method of claim 6, wherein the controlling the switch to be turned on according to a discharge pressure of the compressor when the operation mode is a heating mode comprises:
and when the operation mode is a heating mode, controlling the switch to be opened when the exhaust pressure of the compressor is greater than a first preset exhaust pressure.
8. The control method of claim 6, wherein the controlling the switch to be opened according to the discharge pressure of the compressor or the discharge temperature of the compressor or the discharge superheat of the compressor in the cooling mode or the dehumidifying mode comprises:
and when the operation mode is a refrigeration mode or a dehumidification mode, controlling the switch to be opened when the exhaust pressure of the compressor is greater than a first preset exhaust pressure, or the exhaust temperature of the compressor is greater than a first preset exhaust temperature, or the exhaust superheat degree of the compressor is greater than a first preset exhaust superheat degree.
9. Control method according to any of claims 5-8, characterized in that the switch is turned on with the shortest on-time.
10. The control method of claim 9, wherein the minimum on-time is 10s-60 s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911393861.XA CN111043723A (en) | 2019-12-30 | 2019-12-30 | Air conditioner and control method thereof |
Applications Claiming Priority (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111895630A (en) * | 2020-07-31 | 2020-11-06 | 广东Tcl智能暖通设备有限公司 | Air conditioner operation control method, air conditioner and storage medium |
| CN112178871A (en) * | 2020-09-21 | 2021-01-05 | 广东Tcl智能暖通设备有限公司 | Air conditioner control method, air conditioner and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201819346U (en) * | 2010-09-21 | 2011-05-04 | 珠海格力电器股份有限公司 | Air conditioner |
| CN103256763A (en) * | 2013-06-07 | 2013-08-21 | 天津商业大学 | Humidity controllable air conditioner and humidity control method |
| JP6081033B1 (en) * | 2016-05-24 | 2017-02-15 | 三菱電機株式会社 | Air conditioner |
| CN106403413A (en) * | 2016-11-25 | 2017-02-15 | 广州华凌制冷设备有限公司 | Air conditioning system and control method |
| CN208832603U (en) * | 2018-09-17 | 2019-05-07 | 珠海格力电器股份有限公司 | Air-conditioning system |
-
2019
- 2019-12-30 CN CN201911393861.XA patent/CN111043723A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201819346U (en) * | 2010-09-21 | 2011-05-04 | 珠海格力电器股份有限公司 | Air conditioner |
| CN103256763A (en) * | 2013-06-07 | 2013-08-21 | 天津商业大学 | Humidity controllable air conditioner and humidity control method |
| JP6081033B1 (en) * | 2016-05-24 | 2017-02-15 | 三菱電機株式会社 | Air conditioner |
| CN106403413A (en) * | 2016-11-25 | 2017-02-15 | 广州华凌制冷设备有限公司 | Air conditioning system and control method |
| CN208832603U (en) * | 2018-09-17 | 2019-05-07 | 珠海格力电器股份有限公司 | Air-conditioning system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111895630A (en) * | 2020-07-31 | 2020-11-06 | 广东Tcl智能暖通设备有限公司 | Air conditioner operation control method, air conditioner and storage medium |
| CN112178871A (en) * | 2020-09-21 | 2021-01-05 | 广东Tcl智能暖通设备有限公司 | Air conditioner control method, air conditioner and storage medium |
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Application publication date: 20200421 |