CN110671744A - Air conditioner and constant-temperature dehumidification control method thereof - Google Patents
Air conditioner and constant-temperature dehumidification control method thereof Download PDFInfo
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- 238000007791 dehumidification Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 35
- 230000007246 mechanism Effects 0.000 claims abstract description 125
- 230000008569 process Effects 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 7
- 238000005057 refrigeration Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 238000004378 air conditioning 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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located 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
- F24F11/62—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
- F24F11/62—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
- 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
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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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
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
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- Combustion & Propulsion (AREA)
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- Physics & Mathematics (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides an air conditioner and a control method for constant temperature dehumidification thereof, wherein the air conditioner comprises: the outdoor unit comprises an outdoor fan, a compressor, an outdoor heat exchanger and an outdoor throttling mechanism which are sequentially connected; the indoor unit comprises an indoor fan, an indoor throttling mechanism, an indoor heat exchanger and a multi-way valve, wherein the indoor heat exchanger comprises at least two heat exchange parts, one ends of the at least two heat exchange parts are respectively connected to the multi-way valve, the other ends of the at least two heat exchange parts are respectively connected to the outdoor throttling mechanism through the indoor throttling mechanism or directly connected to the outdoor throttling mechanism, and the at least two heat exchange parts form a parallel structure or at least one heat exchange part connected with the indoor throttling mechanism is connected with the outdoor heat exchanger in parallel through the multi-way valve; and a control mechanism. Therefore, the air conditioner can control the indoor temperature and humidity at the same time, and the temperature of the indoor environment is not influenced while effective dehumidification is guaranteed.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner and a constant-temperature dehumidification control method thereof.
Background
Air conditioners generally have the main functions of cooling, heating, ventilation, dehumidification and the like. The conventional air conditioner can not control the temperature and the humidity simultaneously in the dehumidification process, and the ambient temperature is often low when the indoor humidity reaches a set value, so that the thermal comfort is influenced. Therefore, it is desirable to provide an air conditioner that can control the indoor temperature and humidity simultaneously during dehumidification, and that can effectively dehumidify and does not affect the temperature of the indoor environment.
Disclosure of Invention
The invention solves the problem of providing an air conditioner which can control the indoor temperature and humidity simultaneously in the dehumidification process, and ensures that the temperature of the indoor environment is not influenced while the dehumidification is effectively carried out.
To solve the above problems, the present invention provides an air conditioner comprising:
the outdoor unit comprises an outdoor fan, a compressor, an outdoor heat exchanger and an outdoor throttling mechanism which are sequentially connected;
the indoor unit comprises an indoor fan, an indoor throttling mechanism, an indoor heat exchanger and a multi-way valve, wherein the indoor heat exchanger comprises at least two heat exchange parts, one ends of the at least two heat exchange parts are respectively connected to the multi-way valve, the other ends of the at least two heat exchange parts are respectively connected to the outdoor throttling mechanism through the indoor throttling mechanism or directly connected to the outdoor throttling mechanism, and the at least two heat exchange parts form a parallel structure or at least one heat exchange part connected with the indoor throttling mechanism is connected with the outdoor heat exchanger in parallel through the multi-way valve;
and the control mechanism is used for controlling the compressor, the outdoor throttling mechanism, the outdoor fan, the indoor throttling mechanism, the indoor fan and the multi-way valve.
Therefore, the two parts of heat exchangers in the air conditioner can be used as an evaporator or a condenser at the same time, so that the temperature can be quickly reduced or increased; or respectively used as an evaporator and a condenser, can be controlled in real time according to the relation between the actual indoor temperature and humidity and the temperature and humidity set by a user in the dehumidification operation process, and achieves the purpose of reducing the indoor temperature without being too low during dehumidification.
Further, in the indoor unit, the indoor heat exchanger includes a first indoor heat exchanger and a second indoor heat exchanger, the multi-way valve is a three-way valve, wherein a first end of the first indoor heat exchanger is connected with an indoor throttling mechanism, the indoor throttling mechanism is connected to an outdoor throttling mechanism, and a second end of the first indoor heat exchanger is connected with a third end of the three-way valve; the first end of the second indoor heat exchanger is connected to the outdoor throttling mechanism, the second end of the second indoor heat exchanger is connected to the second end of the three-way valve, the first end of the three-way valve is connected to the exhaust port of the compressor, and the second end of the three-way valve is connected to the suction port of the compressor.
Therefore, the first indoor heat exchanger, the second indoor heat exchanger and the three-way valve connected with the first indoor heat exchanger and the second indoor heat exchanger can conveniently realize the real-time switching of the functions of a plurality of heat exchange parts of the indoor heat exchangers, and meanwhile, the flow passing through each heat exchanger can be more accurately and conveniently controlled through a plurality of parallel connection modes of pipelines formed by the three-way valves.
Furthermore, in the air conditioner, the indoor throttling mechanism is completely opened, the outdoor throttling mechanism is partially throttled, when the second end and the third end of the three-way valve are communicated, the first indoor heat exchanger pipeline and the second indoor heat exchanger pipeline are connected in parallel and then communicated with the outdoor heat exchanger, the first indoor heat exchanger and the second indoor heat exchanger are used as evaporators, and the outdoor heat exchanger is used as a condenser.
Through constituting the parallelly connected structure of first indoor heat exchanger pipeline and second indoor heat exchanger pipeline, can reduce indoor temperature and humidity fast under the condition of dehumidification while cooling.
Furthermore, in the air conditioner, the indoor throttling mechanism is used for throttling partially, the outdoor throttling mechanism is used for throttling partially, when the first end and the third end of the three-way valve are communicated, the outdoor heat exchanger pipeline is connected with the first indoor heat exchanger pipeline in parallel and then communicated with the second indoor heat exchanger, the second indoor heat exchanger is used as an evaporator, and the first indoor heat exchanger and the outdoor heat exchanger are used as condensers.
By forming a structure that the outdoor heat exchanger pipeline is connected with the first indoor heat exchanger pipeline in parallel, the second indoor heat exchanger can be used as an evaporator to reduce the temperature and humidity of indoor air; the first indoor heat exchanger is used for condensing and radiating heat to the indoor space; the outdoor heat exchanger is used as a condenser to emit heat generated by the operation of the compressor, so that the heat generated by the first indoor heat exchanger, the second indoor heat exchanger, the outdoor heat exchanger and the compressor is balanced.
Furthermore, in the air conditioner, the indoor throttling mechanism is used for throttling partially, the first end and the third end of the three-way valve are communicated, when the outdoor throttling mechanism is completely closed, the first indoor heat exchanger is connected with the second indoor heat exchanger in series, the second indoor heat exchanger is used as an evaporator, and the first indoor heat exchanger is used as a condenser.
The second indoor heat exchanger is used as an evaporator to reduce the temperature and humidity of indoor air, the first indoor heat exchanger is used as a condenser to radiate heat generated by the compressor to the indoor air, the heat lost when the second indoor heat exchanger is used as the evaporator is balanced, and the indoor environment temperature is further improved; and because the outdoor throttling mechanism is closed, the outdoor heat exchanger does not participate in heat exchange, thereby saving the heat loss of the outdoor heat exchanger and effectively improving the indoor temperature.
Furthermore, the outdoor unit also comprises a four-way reversing valve, wherein the first end of the four-way reversing valve is connected to an exhaust port of the compressor, the second end of the four-way reversing valve is connected with the outdoor heat exchanger, and the third end of the four-way reversing valve is connected with an air suction port of the compressor; and the fourth end of the four-way reversing valve is connected to the second end of the three-way valve.
Furthermore, in the process of refrigeration or dehumidification of the air conditioner, the first end, the second end, the third end and the fourth end of a four-way reversing valve of the outdoor unit are respectively communicated; in the heating process of the air conditioner, the second end, the third end, the first end and the fourth end of the four-way reversing valve of the outdoor unit are respectively communicated.
Through the setting of four-way reversing valve for conventional refrigeration, heating, dehumidification function can be realized to the air conditioner, and can realize keeping indoor environment temperature in certain extent in the operation process that dehumidifies, can guarantee the thermal comfort of indoor environment when dehumidifying.
According to another aspect of the present invention, there is provided a control method for constant temperature dehumidification of an air conditioner, using the air conditioner as described above, comprising:
s1, comparing the indoor environment temperature with the temperature set by the user to obtain a comparison result;
and S2, controlling the opening degree of the throttling mechanism, the state of the valve and the running speed of the compressor according to the comparison result, thereby controlling the running states of at least two heat exchange parts of the indoor heat exchanger and the outdoor heat exchanger, and controlling the indoor environment temperature to reach the set temperature while dehumidifying.
The air conditioner pipeline structure is controlled by comparing the indoor environment temperature with the temperature set by a user, so that two parts of heat exchangers of an indoor unit of the air conditioner can be switched in real time to serve as an evaporator or a condenser, meanwhile, real-time control is carried out according to the relation between the indoor actual temperature and humidity and the temperature and humidity set by an air conditioner user in the dehumidification operation process, and the appropriate indoor temperature can be guaranteed while dehumidification is carried out.
Further, the step S2 includes:
if the comparison result shows that the indoor environment temperature is higher than the temperature set by the user, the indoor throttling mechanism is controlled to be completely opened, the outdoor throttling mechanism is partially throttled, the at least two heat exchange parts of the indoor heat exchanger form a parallel structure through the communication of the multi-way valve and are used as an evaporator, and the outdoor heat exchanger is used as a condenser;
and controlling the throttle degree of the outdoor throttling mechanism and the running speed of the compressor according to the data detected by the indoor environment temperature sensor and the indoor environment humidity sensor, and reducing the indoor environment temperature to the set temperature while dehumidifying.
Through constituting first indoor heat exchanger and the practicality of second indoor heat exchanger conduct the evaporimeter simultaneously, can dehumidify under the condition of cooling down simultaneously, reduce indoor temperature and humidity fast.
Further, the step S2 includes:
if the comparison result shows that the indoor environment temperature is equal to the temperature set by the user, controlling the indoor throttling mechanism to partially throttle, controlling the outdoor throttling mechanism to partially throttle, and communicating the multi-way valve to enable at least one heat exchange part connected with the indoor throttling mechanism to be connected with the outdoor heat exchanger in parallel to be used as a condenser; the other heat exchange parts of the indoor heat exchanger are used as an evaporator;
and controlling the throttle degrees of the indoor throttle mechanism and the outdoor throttle mechanism and the running rotating speed of the compressor, so that the heat generated by the indoor heat exchanger, the outdoor heat exchanger and the compressor is balanced.
The heat exchange part connected with the indoor throttling mechanism is used as a condenser to radiate heat indoors, and the heat exchange part and the outdoor heat exchanger are used as condensers to radiate heat generated by the operation of the compressor; the rest heat exchange parts of the indoor heat exchanger are used as evaporators to reduce the temperature and humidity of indoor air, so that heat exchange of the heat exchangers and the compressors can be balanced, and the current indoor environment temperature is kept.
Further, the step S2 includes:
if the indoor environment temperature is lower than the set temperature of a user, controlling the indoor throttling mechanism to partially throttle, completely closing the outdoor throttling mechanism, connecting a multi-way valve to enable at least one heat exchange part connected with the indoor throttling mechanism to be connected with the outdoor heat exchanger in parallel, using the at least one heat exchange part connected with the indoor throttling mechanism as a condenser, and enabling the outdoor heat exchanger not to participate in heat exchange; the other heat exchange parts of the indoor heat exchanger are used as an evaporator;
according to the data detected by the indoor environment temperature sensor and the indoor environment humidity sensor, the throttle degree of the indoor throttle mechanism and the running rotating speed of the compressor are controlled, and the indoor environment temperature is increased while dehumidification is performed.
The temperature and the humidity of indoor air are reduced by adopting part of the indoor heat exchangers as evaporators, and the heat generated by the compressor is dissipated into the indoor air by using the rest of the indoor heat exchangers as condensers, so that the heat lost by the indoor heat exchangers as the evaporators can be balanced, and the indoor environment temperature is further improved; and the outdoor heat exchanger does not participate in heat exchange, so that heat loss of the outdoor heat exchanger is saved, and the indoor temperature can be effectively improved.
Drawings
FIG. 1 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a flow chart of a constant temperature dehumidification control method of an air conditioner according to the present invention.
Description of reference numerals:
1-an air conditioner; 2, an outdoor unit; 3-an indoor unit; 4-a control mechanism; 21-a compressor; a 22-four-way reversing valve; 23-an outdoor throttling mechanism; 24-an outdoor heat exchanger; 25-outdoor fan; 31-indoor throttle mechanism; 32-a first indoor heat exchanger; 33-a second indoor heat exchanger; 34-an indoor fan; 35-indoor ambient temperature sensor; 36-indoor ambient humidity sensor; 37-three-way valve.
Detailed Description
The invention provides an air conditioner and a control method for constant temperature dehumidification thereof, wherein the air conditioner comprises: the outdoor unit comprises an outdoor fan, a compressor, an outdoor heat exchanger and an outdoor throttling mechanism which are sequentially connected; the indoor unit comprises an indoor fan, an indoor throttling mechanism, an indoor heat exchanger and a multi-way valve, wherein the indoor heat exchanger comprises at least two heat exchange parts, one ends of the at least two heat exchange parts are respectively connected to the multi-way valve, the other ends of the at least two heat exchange parts are respectively connected to the outdoor throttling mechanism through the indoor throttling mechanism or directly connected to the outdoor throttling mechanism, and the at least two heat exchange parts form a parallel structure or at least one heat exchange part connected with the indoor throttling mechanism is connected with the outdoor heat exchanger in parallel; the control mechanism is used for controlling the compressor, the outdoor throttling mechanism, the outdoor fan, the indoor throttling mechanism, the indoor fan and the multi-way valve.
Therefore, under the conventional refrigeration and heating modes, the two parts of heat exchangers in the air conditioner can be used as an evaporator or a condenser at the same time; in the dehumidification operation process, two parts of heat exchangers of the indoor unit of the air conditioner can be respectively used as an evaporator and a condenser, and meanwhile, the air conditioner controller can perform real-time control according to the relation between the actual indoor temperature and humidity and the temperature and humidity set by an air conditioner user in the dehumidification operation process, so that the purpose of ensuring the proper indoor temperature while dehumidifying is achieved.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In a first exemplary embodiment of the present invention, an air conditioner is provided. Fig. 1 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention. As shown in fig. 1, an air conditioner 1 according to the present invention includes an outdoor unit 2, an indoor unit 3, a control unit 4, and corresponding air conditioning connection pipes. The outdoor unit 2 of the air conditioner comprises a compressor 21, a four-way reversing valve 22, an outdoor throttling mechanism 23, an outdoor heat exchanger 24 and an outdoor fan 25; the indoor unit 3 of the air conditioner includes an indoor throttle mechanism 31, a first indoor heat exchanger 32, a second indoor heat exchanger 33, an indoor fan 34, an indoor ambient temperature sensor 35, an indoor ambient humidity sensor 36, and a three-way valve 37.
Through the structure, the functions of a plurality of heat exchange parts of the indoor heat exchanger can be conveniently switched in real time, and meanwhile, the flow passing through each heat exchanger can be more accurately and conveniently controlled through a plurality of parallel connection modes of pipelines formed by the three-way valves.
The following detailed description of specific embodiments of the invention is provided in connection with the accompanying drawings.
Referring to fig. 1 again, in the outdoor unit of the air conditioner, the exhaust port of the compressor 21 is connected to the first end of the four-way reversing valve 22, the second end of the four-way reversing valve 22 is connected to the first end of the outdoor heat exchanger 24, the outdoor heat exchanger 24 performs outdoor heat exchange, the second end of the four-way reversing valve 24 is connected to the outdoor throttling mechanism 23, the outdoor fan 25 is used for heat exchange of the outdoor heat exchanger 24, the third end of the four-way reversing valve 22 is connected to the suction port of the compressor 21, and the fourth end of the four.
In the indoor unit of the air conditioner, a first end of a first indoor heat exchanger 32 is connected with an indoor throttling mechanism 31 and is connected with an outdoor throttling mechanism 23, and a second end of the first indoor heat exchanger 32 is connected with a third end of a three-way valve 37; a first end of the second indoor heat exchanger 33 is connected to the outdoor throttling mechanism 23, a second end of the second indoor heat exchanger 33 is connected to a second end of a three-way valve 37, and a first end of the three-way valve 37 is connected to a second end of a four-way reversing valve of the outdoor unit; the indoor fan 34 is used for heat exchange between the first indoor heat exchanger 32 and the second indoor heat exchanger 33.
In the process of refrigerating or dehumidifying operation of the air conditioner, the first end, the second end, the third end and the fourth end of a four-way reversing valve 22 of the outdoor unit are respectively communicated; in the heating process, the second and third ends and the first and fourth ends of the four-way reversing valve 22 of the outdoor unit are respectively communicated.
Both the outdoor throttle 23 and the indoor throttle 31 in the air conditioner may be fully closed or fully opened or partially throttled. The outdoor throttle 23 and the indoor throttle 31 may be throttle elements such as electronic expansion valves. For the indoor throttling mechanism 31 of the indoor unit, in the process of refrigerating or heating of the air conditioner, the indoor throttling mechanism 31 is completely opened, and no throttling function exists; in the process of not cooling and dehumidifying, the indoor throttling mechanism 31 is not opened completely, and the throttling degree of the indoor throttling mechanism can be controlled by the control mechanism 4. For the outdoor throttling mechanism 23 of the outdoor unit, in the process of refrigerating or heating of the air conditioner, the outdoor throttling mechanism 23 is completely opened, and no throttling function exists; in the dehumidification process, if the indoor environment temperature needs to be reduced or kept unchanged, the outdoor throttling mechanism 23 is not completely opened and is controlled at a certain throttling degree; if the indoor ambient temperature needs to be raised, the outdoor throttling mechanism 23 is closed, so that the outdoor heat exchanger does not participate in heat exchange.
For the three-way valve 37 of the indoor unit, in the process of refrigerating or heating of the air conditioner, the second end and the third end of the three-way valve 37 are communicated; during dehumidification of the air conditioner, the three-way valve 37 can communicate the first and third ends of the three-way valve or communicate the second and third ends of the three-way valve. When the first end and the third end of the three-way valve are communicated, a refrigerant circulation pipeline structure is formed, wherein the pipeline of the outdoor heat exchanger 24 is connected with the pipeline of the first indoor heat exchanger 32 in parallel and then communicated with the second indoor heat exchanger 33; when the second end and the third end of the three-way valve are communicated, a refrigerant circulation pipeline structure is formed, wherein the pipeline of the first indoor heat exchanger 32 is connected with the pipeline of the second indoor heat exchanger 33 in parallel and then communicated with the outdoor heat exchanger 24.
Specifically, in the cooling and dehumidifying process, when the second and third ends of the three-way valve 37 are communicated, both the first indoor heat exchanger 32 and the second indoor heat exchanger 33 are used as evaporators, and at this time, the indoor temperature and humidity will decrease simultaneously; in the process of cooling and dehumidifying, when the first end and the third end of the three-way valve 37 are communicated, the first indoor heat exchanger 32 is used as a condenser, the second indoor heat exchanger 33 is used as an evaporator, at the moment, the second indoor heat exchanger 33 can continuously remove moisture in indoor air and reduce the temperature of the indoor air, meanwhile, the first indoor heat exchanger 32 is used as a condenser to reheat the air which is dehumidified and cooled by passing through the second indoor heat exchanger 33, and the temperature of the indoor air is ensured not to be reduced while the moisture is removed.
Therefore, when the indoor temperature is higher than the set value, the indoor temperature and the humidity can be simultaneously reduced by a cooling and dehumidifying method; when the indoor temperature is less than or equal to the set value, the first indoor heat exchanger 32 and the second indoor heat exchanger 33 in the indoor unit are respectively used as a condenser and an evaporator by a method of not cooling and dehumidifying, so that the indoor temperature is not too low while the indoor humidity is reduced.
The indoor heat exchanger in the above embodiment includes a first indoor heat exchanger and a second indoor heat exchanger, and it can be understood that the indoor heat exchanger may be divided into a plurality of portions, and the plurality of portions may be used as a condenser or an evaporator at the same time, or as a condenser or an evaporator respectively, and the number of portions used as the condenser or the evaporator is determined according to the deviation of the actual indoor ambient temperature and humidity from the user setting value.
Further, an indoor environment temperature sensor 35 and an indoor environment humidity sensor 36 are further arranged in the indoor unit, and the indoor environment temperature sensor 35 and the indoor environment humidity sensor 36 can acquire the temperature and the air humidity of the indoor environment and can feed the acquired data back to the control mechanism 4.
The air conditioner further comprises a control mechanism 4, wherein the control mechanism 4 is electrically connected with the compressor 21, the four-way reversing valve 22, the outdoor throttling mechanism 23, the outdoor fan 25, the indoor throttling mechanism 31, the indoor fan 34 and the three-way valve 37, and can control the rotating speed of the compressor 21, the communication state of the four-way reversing valve 22, the throttling degree of the outdoor throttling mechanism 23, the operation state of the outdoor fan 25, the throttling degree of the indoor throttling mechanism 31, the operation state of the indoor fan 34 and the communication state of the three-way valve 37.
In the dehumidification operation process, the control mechanism 4 can intelligently control the communication state of the three-way valve 37 and the throttle degrees of the outdoor throttle mechanism 23 and the indoor throttle mechanism 31 according to the data detected by the indoor environment temperature sensor 35 and the indoor environment humidity sensor 36, reduce the indoor humidity and simultaneously keep the indoor temperature within a certain range, thereby achieving the function of constant temperature dehumidification.
In a second exemplary embodiment of the present invention, a method for controlling constant temperature dehumidification of an air conditioner is provided. FIG. 2 is a flow chart of a control method for constant temperature dehumidification of an air conditioner according to the present invention. As shown in fig. 2, the control method includes:
s1, comparing the indoor environment temperature with the temperature set by the user to obtain a comparison result;
and S2, controlling the opening degree of the throttling mechanism, the state of the valve and the running speed of the compressor according to the comparison result, thereby controlling the running states of at least two heat exchange parts of the indoor heat exchanger and the outdoor heat exchanger, and controlling the indoor environment temperature to reach the set temperature while dehumidifying.
The air conditioner pipeline structure is controlled by comparing the indoor environment temperature with the temperature set by a user, so that two parts of heat exchangers of an indoor unit of the air conditioner can be switched in real time to serve as an evaporator or a condenser, meanwhile, real-time control is carried out according to the relation between the indoor actual temperature and humidity and the temperature and humidity set by an air conditioner user in the dehumidification operation process, and the appropriate indoor temperature can be guaranteed while dehumidification is carried out.
In this embodiment, the air conditioner according to the first embodiment is adopted, wherein the throttling mechanism includes an indoor throttling mechanism 31 and an outdoor throttling mechanism 23, and at least two heat exchanging portions of the indoor heat exchanger are a first indoor heat exchanger and a second indoor heat exchanger.
Specifically, in step S2, there are three cases during the actual dehumidification operation, including:
s201, if the indoor ambient temperature is higher than the user-set temperature as a result of the comparison, the indoor ambient temperature is decreased while dehumidification is required.
In this case, the indoor throttle mechanism 31 is fully opened, the outdoor throttle mechanism 23 is partially throttled, the second and third ends of the three-way valve 37 are communicated, the first indoor heat exchanger 32 and the second indoor heat exchanger 33 are both used as evaporators, and the outdoor heat exchanger 24 is used as a condenser.
From this, can reduce indoor ambient temperature and humidity fast, control according to the data that indoor ambient temperature sensor 35, indoor ambient humidity sensor 36 detected simultaneously, guarantee to reduce indoor ambient temperature to the settlement temperature when dehumidification.
S202, if the indoor ambient temperature is equal to the user-set temperature as a result of the comparison, the indoor ambient temperature is kept unchanged while dehumidification is performed.
In this case, the indoor throttle means 31 is controlled to be throttled partially, the outdoor throttle means 23 is controlled to be throttled partially, and the first and third ends of the three-way valve 37 are communicated; the second indoor heat exchanger 33 is used as an evaporator for reducing the indoor air temperature and humidity; the first indoor heat exchanger 32 is used as a condenser to radiate heat to the indoor, and the heat lost when the second indoor heat exchanger 33 is used as an evaporator is balanced; the outdoor heat exchanger 24 serves as a condenser for dissipating heat generated by the operation of the compressor. The control means 4 controls the opening degrees of the indoor throttle means 31 and the outdoor throttle means 23 and the operating speed of the compressor so that the heat generated by the first indoor heat exchanger 32, the second indoor heat exchanger 33, the outdoor heat exchanger 24, and the compressor is balanced.
The heat exchange part connected with the indoor throttling mechanism is used as a condenser to radiate heat indoors, and the heat exchange part and the outdoor heat exchanger are used as condensers to radiate heat generated by the operation of the compressor; the rest heat exchange parts of the indoor heat exchanger are used as evaporators to reduce the temperature and humidity of indoor air, so that heat exchange of the heat exchangers and the compressors can be balanced, and the current indoor environment temperature is kept.
S203, if the indoor ambient temperature is lower than the user set temperature, the indoor ambient temperature needs to be increased while dehumidifying.
In this case, the control chamber throttle mechanism 31 partially throttles, and the first and third ends of the three-way valve 37 communicate; the second indoor heat exchanger 33 is used as an evaporator for reducing the indoor air temperature and humidity; the first indoor heat exchanger 32 is used as a condenser to radiate heat to the indoor, and the heat lost when the second indoor heat exchanger 33 is used as an evaporator is balanced; the outdoor throttle mechanism 23 is fully closed and the outdoor heat exchanger 24 does not participate in heat exchange. The first indoor heat exchanger 32 radiates heat generated by the compressor to indoor air for increasing the indoor ambient temperature. The control mechanism 4 can intelligently control the communication state of the three-way valve 37 and the throttle degrees of the outdoor throttle mechanism 23 and the indoor throttle mechanism 31 according to the data detected by the indoor environment temperature sensor 35 and the indoor environment humidity sensor 36, and can keep the indoor temperature within a certain range while reducing the indoor humidity, so that the indoor environment temperature is improved while dehumidifying.
The temperature and the humidity of indoor air are reduced by adopting part of the indoor heat exchangers as evaporators, and the heat generated by the compressor is dissipated into the indoor air by using the rest of the indoor heat exchangers as condensers, so that the heat lost by the indoor heat exchangers as the evaporators can be balanced, and the indoor environment temperature is further improved; and the outdoor heat exchanger does not participate in heat exchange, so that heat loss of the outdoor heat exchanger is saved, and the indoor temperature can be effectively improved.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (12)
1. An air conditioner, comprising:
the outdoor unit (2), the outdoor unit (2) comprises an outdoor fan (25), and a compressor (21), an outdoor heat exchanger (24) and an outdoor throttling mechanism (23) which are connected in sequence;
the indoor unit (3) comprises an indoor fan (34), an indoor throttling mechanism (31), an indoor heat exchanger and a multi-way valve, wherein the indoor heat exchanger comprises at least two heat exchange parts, one ends of the at least two heat exchange parts are respectively connected to the multi-way valve, the other ends of the at least two heat exchange parts are respectively connected to the outdoor throttling mechanism (23) through the indoor throttling mechanism (31) or directly connected to the outdoor throttling mechanism (23), and the at least two heat exchange parts form a parallel structure or at least one heat exchange part connected with the indoor throttling mechanism (31) is connected with the outdoor heat exchanger (24) in parallel through the communication of the multi-way valve;
and the control mechanism (4) is used for controlling the compressor (21), the outdoor throttling mechanism (23), the outdoor fan (25), the indoor throttling mechanism (31), the indoor fan (34) and the multi-way valve.
2. The air conditioner according to claim 1,
in the indoor unit (3), the indoor heat exchanger comprises a first indoor heat exchanger (32) and a second indoor heat exchanger (33), the multi-way valve is a three-way valve (37), wherein a first end of the first indoor heat exchanger (32) is connected with an indoor throttling mechanism (31), the indoor throttling mechanism (31) is connected to an outdoor throttling mechanism (23), and a second end of the first indoor heat exchanger (32) is connected with a third end of the three-way valve (37); the first end of the second indoor heat exchanger (33) is connected to the outdoor throttling mechanism (23), the second end is connected to the second end of the three-way valve (37), the first end of the three-way valve (37) is connected to the exhaust port of the compressor (21), and the second end of the three-way valve (37) is connected to the suction port of the compressor (21).
3. The air conditioner according to claim 2, wherein the indoor throttle mechanism (31) is fully opened, the outdoor throttle mechanism (23) is partially throttled, when the second and third ends of the three-way valve (37) are communicated, the pipeline of the first indoor heat exchanger (32) is connected in parallel with the pipeline of the second indoor heat exchanger (33) and then communicated with the outdoor heat exchanger (24), the first indoor heat exchanger (32) and the second indoor heat exchanger (33) are both used as evaporators, and the outdoor heat exchanger (24) is used as a condenser.
4. The air conditioner according to claim 2, wherein the indoor throttling mechanism (31) is partially throttled, the outdoor throttling mechanism (23) is partially throttled, when the first end and the third end of the three-way valve (37) are communicated, a pipeline of the outdoor heat exchanger (24) is connected with a pipeline of the first indoor heat exchanger (32) in parallel and then communicated with the second indoor heat exchanger (33), the second indoor heat exchanger (33) is used as an evaporator, and the first indoor heat exchanger (32) and the outdoor heat exchanger (24) are used as condensers.
5. The air conditioner according to claim 2, wherein the indoor throttle mechanism (31) is partially throttled, the first and third ends of the three-way valve (37) are communicated, and when the outdoor throttle mechanism (23) is completely closed, the first indoor heat exchanger (32) is connected in series with the second indoor heat exchanger (33), the second indoor heat exchanger (33) is used as an evaporator, and the first indoor heat exchanger (32) is used as a condenser.
6. The air conditioner as claimed in claim 2, wherein the outdoor unit (2) further comprises a four-way reversing valve (22), a first end of the four-way reversing valve (22) is connected to a discharge port of the compressor (21), a second end of the four-way reversing valve (22) is connected to the outdoor heat exchanger (24), and a third end of the four-way reversing valve (22) is connected to a suction port of the compressor (21); the fourth end of the four-way reversing valve (22) is connected to the second end of the three-way valve (37).
7. The air conditioner as claimed in claim 6, wherein the first and second ends and the third and fourth ends of the four-way reversing valve (22) of the outdoor unit are respectively communicated during the cooling or dehumidifying process; in the heating process of the air conditioner, the second end and the third end as well as the first end and the fourth end of a four-way reversing valve (22) of the outdoor unit are respectively communicated.
8. The air conditioner according to claim 1, wherein an indoor ambient temperature sensor (35) and an indoor ambient humidity sensor (36) are further provided in the indoor unit (2) for collecting the temperature and the air humidity of the indoor environment and feeding back the collected data to the control mechanism (4).
9. A control method of constant temperature dehumidification of an air conditioner using the air conditioner as claimed in any one of claims 1 to 8, comprising:
s1, comparing the indoor environment temperature with the temperature set by the user to obtain a comparison result;
and S2, controlling the opening degree of the throttling mechanism, the state of the valve and the running speed of the compressor according to the comparison result, thereby controlling the running states of at least two heat exchange parts of the indoor heat exchanger and the outdoor heat exchanger, and controlling the indoor environment temperature to reach the set temperature while dehumidifying.
10. The control method according to claim 9, wherein the step S2 includes:
if the comparison result shows that the indoor environment temperature is higher than the set temperature of the user, the indoor throttling mechanism (31) is controlled to be completely opened, the outdoor throttling mechanism (23) is partially throttled, the at least two heat exchange parts of the indoor heat exchanger form a parallel structure through the communication of the multi-way valve and are used as an evaporator, and the outdoor heat exchanger (24) is used as a condenser;
the throttle degree of the outdoor throttle mechanism (23) and the operating speed of the compressor (21) are controlled according to data detected by the indoor environment temperature sensor (35) and the indoor environment humidity sensor (36), and the indoor environment temperature is reduced to a set temperature while dehumidification is performed.
11. The control method according to claim 9, wherein the step S2 includes:
if the comparison result shows that the indoor environment temperature is equal to the temperature set by the user, controlling the indoor throttling mechanism (31) to partially throttle, controlling the outdoor throttling mechanism (23) to partially throttle, and connecting the multi-way valve to enable at least one heat exchange part connected with the indoor throttling mechanism (31) to be connected with the outdoor heat exchanger (24) in parallel to be used as a condenser; the other heat exchange parts of the indoor heat exchanger are used as an evaporator;
the throttle degrees of the indoor throttle mechanism (31) and the outdoor throttle mechanism (23) and the running speed of the compressor (21) are controlled, so that the heat generated by the indoor heat exchanger, the outdoor heat exchanger (24) and the compressor (21) is balanced.
12. The control method according to claim 9, wherein the step S2 includes:
if the indoor environment temperature is lower than the temperature set by a user, controlling the indoor throttling mechanism (31) to partially throttle, completely closing the outdoor throttling mechanism (23), connecting a multi-way valve to enable at least one heat exchange part connected with the indoor throttling mechanism (31) to be connected with the outdoor heat exchanger (24) in parallel, using the at least one heat exchange part connected with the indoor throttling mechanism (31) as a condenser, and enabling the outdoor heat exchanger (24) not to participate in heat exchange; the other heat exchange parts of the indoor heat exchanger are used as an evaporator;
the throttle degree of the indoor throttle mechanism (31) and the operating speed of the compressor (21) are controlled according to data detected by the indoor environment temperature sensor (35) and the indoor environment humidity sensor (36), and the indoor environment temperature is increased while dehumidification is performed.
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