Air conditioner and constant temperature dehumidification control method thereof

Abstract

The present invention provides an air conditioner and a control method for constant temperature dehumidification thereof, wherein the air conditioner comprises: an outdoor unit, comprising an outdoor fan and a compressor, an outdoor heat exchanger and an outdoor throttling mechanism connected in sequence; an indoor unit, comprising 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 end of the at least two heat exchange parts is respectively connected to the multi-way valve, and the other end is respectively connected to the outdoor throttling mechanism through the indoor throttling mechanism or directly, and the connection of the multi-way valve makes the at least two heat exchange parts form a parallel structure, or at least one heat exchange part connected to the indoor throttling mechanism is connected in parallel with the outdoor heat exchanger; and a control mechanism. Thus, the air conditioner can simultaneously control the indoor temperature and humidity, ensuring that the temperature of the indoor environment is not affected while effectively dehumidifying.

Description

Technical Field

[0001] The present invention and the technical field of air conditioning, in particular, relate to an air conditioner and a constant temperature dehumidification control method thereof. Background Art

[0002] Air conditioners generally have the main functions of cooling, heating, ventilation, and dehumidification. Conventional air conditioners cannot control temperature and humidity at the same time during the dehumidification process. When the indoor humidity reaches the set value, the ambient temperature is often low, which affects thermal comfort. Therefore, it is urgent to provide an air conditioner that can control indoor temperature and humidity at the same time during the dehumidification process, and effectively dehumidify without affecting the temperature of the indoor environment. Summary of the invention

[0003] The problem solved by the present invention is to provide an air conditioner which can simultaneously control indoor temperature and humidity during the dehumidification process, thereby ensuring that the temperature of the indoor environment is not affected while effectively dehumidifying.

[0004] In order to solve the above problems, the present invention provides an air conditioner, comprising:

[0005] An outdoor unit, the outdoor unit comprising an outdoor fan and a compressor, an outdoor heat exchanger and an outdoor throttling mechanism connected in sequence;

[0006] An indoor unit, the indoor unit comprising 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 end of the at least two heat exchange parts are respectively connected to the multi-way valve, and the other end is respectively connected to the outdoor throttling mechanism through the indoor throttling mechanism or directly, and the connection of the multi-way valve makes the at least two heat exchange parts form a parallel structure, or at least one heat exchange part connected to the indoor throttling mechanism is connected in parallel with the outdoor heat exchanger;

[0007] The control mechanism is used to control the compressor, the outdoor throttling mechanism, the outdoor fan, the indoor throttling mechanism, the indoor fan and the multi-way valve.

[0008] Therefore, the two indoor heat exchangers of the air conditioner can be used as evaporator or condenser at the same time, so as to quickly lower or raise the temperature; or they can be used as evaporator and condenser respectively, and can be controlled in real time during the dehumidification operation according to the relationship between the actual indoor temperature and humidity and the temperature and humidity set by the user, so as to achieve the purpose of dehumidification without lowering the indoor temperature too much.

[0009] Furthermore, in the indoor unit, the indoor heat exchanger includes a first indoor heat exchanger and a second indoor heat exchanger, and the multi-way valve is a three-way valve, wherein the first end of the first indoor heat exchanger is connected to the indoor throttling mechanism, the indoor throttling mechanism is connected to the outdoor throttling mechanism, and the second end of the first indoor heat exchanger is connected to the third end of the three-way valve; the first end of the second indoor heat exchanger is connected to the outdoor throttling mechanism, and the second end 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.

[0010] Therefore, by setting up the first indoor heat exchanger, the second indoor heat exchanger and the three-way valve connected thereto, the real-time switching of the functions of multiple heat exchange parts of the indoor heat exchanger can be easily realized. At the same time, the multiple parallel modes of the pipeline formed by the three-way valve can more accurately and conveniently control the flow through each heat exchanger.

[0011] Furthermore, in the air conditioner, the indoor throttling mechanism is fully opened and the outdoor throttling mechanism is partially throttled. When the second and third ends of the three-way valve are connected, the first indoor heat exchanger pipeline and the second indoor heat exchanger pipeline are connected in parallel and then connected to the outdoor heat exchanger. The first indoor heat exchanger and the second indoor heat exchanger are both used as evaporators, and the outdoor heat exchanger is used as a condenser.

[0012] By forming a structure in which the first indoor heat exchanger pipeline is connected in parallel with the second indoor heat exchanger pipeline, the indoor temperature and humidity can be quickly reduced while dehumidifying and cooling at the same time.

[0013] Furthermore, in the air conditioner, the indoor throttling mechanism is partially throttled, and the outdoor throttling mechanism is partially throttled. When the first and third ends of the three-way valve are connected, the outdoor heat exchanger pipeline is connected in parallel with the first indoor heat exchanger pipeline and then connected to 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.

[0014] By forming a structure in which the outdoor heat exchanger pipeline is connected in parallel with the first indoor heat exchanger pipeline, the second indoor heat exchanger can be used as an evaporator to reduce the indoor air temperature and humidity; the first indoor heat exchanger can be used as a condenser to dissipate heat to the room; and the outdoor heat exchanger can be used as a condenser to dissipate the heat generated by the operation of the compressor, thereby balancing the heat generated by the first indoor heat exchanger, the second indoor heat exchanger, the outdoor heat exchanger and the compressor.

[0015] Furthermore, in the air conditioner, the indoor throttling mechanism partially throttles, the first and third ends of the three-way valve are connected, and when the outdoor throttling mechanism is completely closed, the first indoor heat exchanger is connected in series with the second indoor heat exchanger, the second indoor heat exchanger is used as an evaporator, and the first indoor heat exchanger is used as a condenser.

[0016] By using the second indoor heat exchanger as an evaporator to lower the indoor air temperature and humidity, the first indoor heat exchanger acts as a condenser to dissipate the heat generated by the compressor into the indoor air, balancing the heat lost when the second indoor heat exchanger is used as an evaporator, and further increasing the indoor ambient temperature; and since the outdoor throttling mechanism is closed, the outdoor heat exchanger does not participate in heat exchange, thereby eliminating the heat loss of the outdoor heat exchanger, thereby more effectively increasing the indoor temperature.

[0017] Furthermore, the outdoor unit also includes a four-way reversing valve, a first end of the four-way reversing valve is connected to the exhaust port of the compressor, a second end of the four-way reversing valve is connected to the outdoor heat exchanger, and a third end of the four-way reversing valve is connected to the suction port of the compressor; the fourth end of the four-way reversing valve is connected to the second end of the three-way valve.

[0018] Furthermore, during the cooling or dehumidification process of the air conditioner, the first, second ends and the third, fourth ends of the four-way reversing valve of the outdoor unit are connected respectively; during the heating process of the air conditioner, the second, third ends and the first, fourth ends of the four-way reversing valve of the outdoor unit are connected respectively.

[0019] Through the setting of the four-way reversing valve, the air conditioner can realize conventional cooling, heating and dehumidification functions, and can keep the indoor ambient temperature within a certain range during the dehumidification operation, and can ensure the thermal comfort of the indoor environment while dehumidifying.

[0020] According to another aspect of the present invention, a control method for constant temperature dehumidification of an air conditioner is provided, using the air conditioner as described above, comprising:

[0021] S1, compare the indoor ambient temperature with the user set temperature to obtain a comparison result;

[0022] S2, based on the comparison result, controls the opening of the throttling mechanism, the state of the valve and the operating speed of the compressor, thereby controlling the operating state of at least two heat exchange parts of the indoor heat exchanger and the outdoor heat exchanger, and controlling the indoor ambient temperature to reach the set temperature while dehumidifying.

[0023] By comparing the indoor ambient temperature with the temperature set by the user, the air conditioning pipeline structure is controlled, so that the two-part heat exchanger of the air conditioner indoor unit can be switched as an evaporator or condenser in real time. At the same time, during the dehumidification operation, real-time control is performed according to the relationship between the actual indoor temperature and humidity and the temperature and humidity set by the air conditioner user, which can ensure the appropriate indoor temperature while dehumidifying.

[0024] Furthermore, the step S2 comprises:

[0025] If the comparison result shows that the indoor ambient temperature is higher than the user-set temperature, the indoor throttling mechanism is controlled to be fully opened, and the outdoor throttling mechanism is partially throttled. The multi-way valve is connected so that the at least two heat exchange parts of the indoor heat exchanger form a parallel structure and are used as an evaporator, and the outdoor heat exchanger is used as a condenser.

[0026] The throttling degree of the outdoor throttling mechanism and the operating speed of the compressor are controlled according to the data detected by the indoor ambient temperature sensor and the indoor ambient humidity sensor, so as to reduce the indoor ambient temperature to the set temperature while dehumidifying.

[0027] By configuring the first indoor heat exchanger and the second indoor heat exchanger to function as evaporators at the same time, the indoor temperature and humidity can be quickly reduced while dehumidifying and cooling.

[0028] Furthermore, the step S2 comprises:

[0029] If the comparison result is that the indoor ambient temperature is equal to the user set temperature, the indoor throttling mechanism is partially throttled, the outdoor throttling mechanism is partially throttled, and the multi-way valve is connected so that at least one heat exchange part connected to the indoor throttling mechanism is connected in parallel with the outdoor heat exchanger to be used as a condenser; the remaining heat exchange parts of the indoor heat exchanger are used as evaporators;

[0030] The throttling degrees of the indoor throttling mechanism and the outdoor throttling mechanism and the operating speed of the compressor are controlled so that the heat generated by the indoor heat exchanger, the outdoor heat exchanger and the compressor is balanced.

[0031] The heat exchange part connected to the indoor throttling mechanism acts as a condenser to dissipate heat to the indoor room, and the outdoor heat exchanger acts as a condenser to dissipate the heat generated by the operation of the compressor; the remaining heat exchange part of the indoor heat exchanger is used as an evaporator to reduce the indoor air temperature and humidity, so that the heat exchange of multiple heat exchangers and compressors can be balanced to maintain the current indoor ambient temperature.

[0032] Furthermore, the step S2 comprises:

[0033] If the indoor ambient temperature is lower than the user-set temperature, the indoor throttling mechanism is controlled to partially throttle, and the outdoor throttling mechanism is completely closed. The multi-way valve is connected so that at least one heat exchange part connected to the indoor throttling mechanism is connected in parallel with the outdoor heat exchanger. The at least one heat exchange part connected to the indoor throttling mechanism is used as a condenser, and the outdoor heat exchanger does not participate in heat exchange; the remaining heat exchange parts of the indoor heat exchanger are used as evaporators;

[0034] The throttling degree of the indoor throttling mechanism and the operating speed of the compressor are controlled according to the data detected by the indoor ambient temperature sensor and the indoor ambient humidity sensor, so as to increase the indoor ambient temperature while dehumidifying.

[0035] By using part of the indoor heat exchanger as an evaporator to lower the indoor air temperature and humidity, and the remaining indoor heat exchangers as condensers to dissipate the heat generated by the compressor into the indoor air, the heat lost by the indoor heat exchanger acting as the evaporator can be balanced and the indoor ambient temperature can be further increased. The outdoor heat exchanger does not participate in the heat exchange, thus eliminating the heat loss of the outdoor heat exchanger, thereby more effectively increasing the indoor temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a structural schematic diagram of an air conditioner according to an embodiment of the present invention;

[0037] Figure 2 The present invention is a flow chart of the constant temperature dehumidification control method of the air conditioner.

[0038] Description of reference numerals:

[0039] 1-air conditioner; 2-outdoor unit; 3-indoor unit; 4-control mechanism; 21-compressor; 22-four-way reversing valve; 23-outdoor throttling mechanism; 24-outdoor heat exchanger; 25-outdoor fan; 31-indoor throttling mechanism; 32-first indoor heat exchanger; 33-second indoor heat exchanger; 34-indoor fan; 35-indoor ambient temperature sensor; 36-indoor ambient humidity sensor; 37-three-way valve. DETAILED DESCRIPTION

[0040] The present invention provides an air conditioner and a control method for constant temperature dehumidification thereof, wherein the air conditioner comprises: an outdoor unit, an indoor unit and a control mechanism, wherein the outdoor unit comprises an outdoor fan and a compressor, an outdoor heat exchanger and an outdoor throttling mechanism connected in sequence; 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 end of the at least two heat exchange parts is respectively connected to the multi-way valve, and the other end is respectively connected to the outdoor throttling mechanism through the indoor throttling mechanism or directly, and the connection of the multi-way valve makes the at least two heat exchange parts form a parallel structure, or at least one heat exchange part connected to the indoor throttling mechanism is connected in parallel with the outdoor heat exchanger; the control mechanism is used to control the compressor, the outdoor throttling mechanism, the outdoor fan, the indoor throttling mechanism, the indoor fan and the multi-way valve.

[0041] Therefore, in conventional cooling and heating modes, the two parts of the heat exchanger in the air conditioner room can be used as an evaporator or condenser at the same time; in the dehumidification operation process, the two parts of the heat exchanger in the air conditioner indoor unit can be used as an evaporator and a condenser respectively. At the same time, the air conditioner controller can perform real-time control according to the relationship between the actual indoor temperature and humidity and the temperature and humidity set by the air conditioner user during the dehumidification operation, so as to achieve the purpose of dehumidification while ensuring the appropriate indoor temperature.

[0042] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0043] In a first exemplary embodiment of the present invention, an air conditioner is provided. Figure 1 FIG. 2 is a schematic diagram of the structure of an air conditioner according to an embodiment of the present invention. Figure 1 As shown, the air conditioner 1 involved in the present invention includes an outdoor unit 2, an indoor unit 3, a control mechanism 4 and corresponding air conditioning connecting pipes. Among them, the air conditioner outdoor unit 2 includes 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 air conditioner indoor unit 3 includes an indoor throttling mechanism 31, a first indoor heat exchanger 32, a second indoor heat exchanger 33, an indoor fan 34, an indoor environment temperature sensor 35, an indoor environment humidity sensor 36, and a three-way valve 37.

[0044] Through the above structure, the real-time switching of the functions of multiple heat exchange parts of the indoor heat exchanger can be easily realized. At the same time, the flow through each heat exchanger can be more accurately and conveniently controlled by forming multiple parallel modes of the pipeline through the three-way valve.

[0045] The specific implementation of the present invention is described in detail below with reference to the accompanying drawings.

[0046] Please refer to Figure 1 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 second end of 24 is connected to the outdoor throttling mechanism 23, the outdoor fan 25 is used for heat exchange in the outdoor heat exchanger 24, the third end of the four-way reversing valve 22 is connected to the air intake port of the compressor 21, and the fourth end of the four-way reversing valve 22 is connected to the second end of the three-way valve 37 of the indoor unit.

[0047] In the indoor unit of the air conditioner, the first end of the first indoor heat exchanger 32 is connected to the indoor throttling mechanism 31 and to the outdoor throttling mechanism 23, and the second end of the first indoor heat exchanger 32 is connected to the 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 of the second indoor heat exchanger 33 is connected to the second end of the three-way valve 37, and the first end of the three-way valve 37 is connected to the second end of the 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.

[0048] During the cooling or dehumidifying operation of the air conditioner, the first and second ends and the third and fourth ends of the outdoor unit's four-way reversing valve 22 are connected respectively; during the heating process, the second and third ends and the first and fourth ends of the outdoor unit's four-way reversing valve 22 are connected respectively.

[0049] The outdoor throttling mechanism 23 and the indoor throttling mechanism 31 in the air conditioner can be completely closed or completely opened or partially throttled. Among them, the outdoor throttling mechanism 23 and the indoor throttling mechanism 31 can be throttling elements such as electronic expansion valves. For the indoor throttling mechanism 31 of the indoor unit, during the cooling or heating process of the air conditioner, the indoor throttling mechanism 31 is fully opened and has no throttling effect; during the dehumidification process without cooling, the indoor throttling mechanism 31 is not fully opened, and its throttling degree can be controlled by the control mechanism 4. For the outdoor throttling mechanism 23 of the outdoor unit, during the cooling or heating process of the air conditioner, the outdoor throttling mechanism 23 is fully opened and has no throttling effect; during the dehumidification process, if it is necessary to reduce the indoor ambient temperature, or keep the indoor ambient temperature unchanged, the outdoor throttling mechanism 23 is not fully opened and controlled at a certain throttling degree; if it is necessary to increase the indoor ambient temperature, the outdoor throttling mechanism 23 is closed, so that the outdoor heat exchanger does not participate in heat exchange.

[0050] As for the three-way valve 37 of the indoor unit, during the cooling or heating process of the air conditioner, the second and third ends of the three-way valve 37 are connected; during the dehumidification process of the air conditioner, the three-way valve 37 can connect the first and third ends of the three-way valve or connect the second and third ends of the three-way valve. When the first and third ends of the three-way valve are connected, a refrigerant flow pipeline structure is formed in which the pipeline of the outdoor heat exchanger 24 is connected in parallel with the pipeline of the first indoor heat exchanger 32 and then connected with the second indoor heat exchanger 33; when the second and third ends of the three-way valve are connected, a refrigerant flow pipeline structure is formed in which 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 connected with the outdoor heat exchanger 24.

[0051] Specifically, in the cooling and dehumidification process, when the second and third ends of the three-way valve 37 are connected, the first indoor heat exchanger 32 and the second indoor heat exchanger 33 are both used as evaporators, and the indoor temperature and humidity will drop at the same time; in the non-cooling and dehumidification process, when the first and third ends of the three-way valve 37 are connected, the first indoor heat exchanger 32 is used as a condenser and the second indoor heat exchanger 33 is used as an evaporator. At this time, the second indoor heat exchanger 33 can continuously remove moisture from the indoor air and reduce the indoor air temperature. At the same time, the first indoor heat exchanger 32 is used as a condenser to reheat the air that has been dehumidified and cooled by the second indoor heat exchanger 33, ensuring that the temperature of the indoor air will not drop while the moisture is removed.

[0052] Therefore, when the indoor temperature is greater than the set value, the indoor temperature and humidity can be reduced simultaneously by cooling and dehumidifying; and 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 used as a condenser and an evaporator respectively by not cooling and dehumidifying, thereby reducing the indoor humidity while ensuring that the indoor temperature will not be too low.

[0053] In the above embodiment, the indoor heat exchanger includes a first indoor heat exchanger and a second indoor heat exchanger. It can be understood that the indoor heat exchanger can be divided into multiple parts, and the multiple parts can be used as a condenser or an evaporator at the same time, or can be used as a condenser or an evaporator separately. The number of parts used as a condenser or an evaporator is determined based on the deviation between the actual indoor ambient temperature and humidity and the user set value.

[0054] Furthermore, the indoor unit is also provided with an indoor environment temperature sensor 35 and an indoor environment humidity sensor 36. The indoor environment temperature sensor 35 and the indoor environment humidity sensor 36 can collect the temperature and air humidity of the indoor environment and can feed back the collected data to the control mechanism 4.

[0055] The air conditioner also includes a control mechanism 4, which is electrically connected to 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 rotation speed of the compressor 21, the connection state of the four-way reversing valve 22, the throttling degree of the outdoor throttling mechanism 23, the operating state of the outdoor fan 25, the throttling degree of the indoor throttling mechanism 31, the operating state of the indoor fan 34, and the connection state of the three-way valve 37.

[0056] During the dehumidification operation, the control mechanism 4 can intelligently control the connection state of the three-way valve 37 and the throttling degree of the outdoor throttling mechanism 23 and the indoor throttling mechanism 31 according to the data detected by the indoor ambient temperature sensor 35 and the indoor ambient humidity sensor 36, thereby maintaining the indoor temperature within a certain range while reducing the indoor humidity, thereby achieving the function of constant temperature dehumidification.

[0057] In a second exemplary embodiment of the present invention, a method for controlling constant temperature dehumidification of an air conditioner is provided. Figure 2 FIG. 1 is a flow chart of a control method for constant temperature dehumidification of an air conditioner according to the present invention. Figure 2 As shown, the control method includes:

[0058] S1, compare the indoor ambient temperature with the user set temperature to obtain a comparison result;

[0059] S2, based on the comparison result, controls the opening of the throttling mechanism, the state of the valve and the operating speed of the compressor, thereby controlling the operating state of at least two heat exchange parts of the indoor heat exchanger and the outdoor heat exchanger, and controlling the indoor ambient temperature to reach the set temperature while dehumidifying.

[0060] By comparing the indoor ambient temperature with the temperature set by the user, the air conditioning pipeline structure is controlled, so that the two-part heat exchanger of the air conditioner indoor unit can be switched as an evaporator or condenser in real time. At the same time, during the dehumidification operation, real-time control is performed according to the relationship between the actual indoor temperature and humidity and the temperature and humidity set by the air conditioner user, which can ensure the appropriate indoor temperature while dehumidifying.

[0061] In this embodiment, the air conditioner as described in the first embodiment is used, wherein the throttling mechanism includes an indoor throttling mechanism 31 and an outdoor throttling mechanism 23, and the at least two heat exchange parts of the indoor heat exchanger are a first indoor heat exchanger and a second indoor heat exchanger.

[0062] Specifically, in step S2, there are three situations in the actual dehumidification operation process, including:

[0063] S201: If the comparison result shows that the indoor ambient temperature is higher than the user-set temperature, dehumidification is required while lowering the indoor ambient temperature.

[0064] In this case, the indoor throttling mechanism 31 is controlled to be fully open, the outdoor throttling mechanism 23 is partially throttled, the second and third ends of the three-way valve 37 are connected, 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.

[0065] In this way, the indoor environment temperature and humidity can be quickly lowered, and control is performed according to the data detected by the indoor environment temperature sensor 35 and the indoor environment humidity sensor 36 to ensure that the indoor environment temperature is lowered to the set temperature while dehumidifying.

[0066] S202: If the comparison result is that the indoor ambient temperature is equal to the user-set temperature, dehumidification is required while keeping the indoor ambient temperature unchanged.

[0067] In this case, the indoor throttling mechanism 31 is controlled to be partially throttled, the outdoor throttling mechanism 23 is controlled to be partially throttled, and the first and third ends of the three-way valve 37 are connected; the second indoor heat exchanger 33 is used as an evaporator to reduce the indoor air temperature and humidity; the first indoor heat exchanger 32 is used as a condenser to dissipate heat to the room to balance the heat lost by the second indoor heat exchanger 33 when used as an evaporator; the outdoor heat exchanger 24 is used as a condenser to dissipate the heat generated by the operation of the compressor. The control mechanism 4 controls the opening of the indoor throttling mechanism 31 and the outdoor throttling mechanism 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.

[0068] The heat exchange part of the indoor throttling mechanism is connected as a condenser to dissipate heat to the indoor room, and the outdoor heat exchanger is used as a condenser to dissipate the heat generated by the operation of the compressor; the remaining heat exchange part of the indoor heat exchanger is used as an evaporator to reduce the indoor air temperature and humidity, so that the heat exchange of multiple heat exchangers and compressors can be balanced to maintain the current indoor ambient temperature.

[0069] S203: If the indoor ambient temperature is lower than the user-set temperature, dehumidification is required while increasing the indoor ambient temperature.

[0070] In this case, the indoor throttling mechanism 31 is controlled to be partially throttled, and the first and third ends of the three-way valve 37 are connected; the second indoor heat exchanger 33 is used as an evaporator to reduce the indoor air temperature and humidity; the first indoor heat exchanger 32 is used as a condenser to dissipate heat to the room to balance the heat lost by the second indoor heat exchanger 33 when used as an evaporator; the outdoor throttling mechanism 23 is completely closed, and the outdoor heat exchanger 24 does not participate in the heat exchange. The first indoor heat exchanger 32 dissipates the heat generated by the compressor into the indoor air to increase the indoor ambient temperature. The control mechanism 4 can intelligently control the connection state of the three-way valve 37 and the throttling degree of the outdoor throttling mechanism 23 and the indoor throttling mechanism 31 according to the data detected by the indoor ambient temperature sensor 35 and the indoor ambient humidity sensor 36, so as to keep the indoor temperature within a certain range while reducing the indoor humidity, thereby increasing the indoor ambient temperature while dehumidifying.

[0071] By using part of the indoor heat exchanger as an evaporator to lower the indoor air temperature and humidity, and the remaining indoor heat exchangers as condensers to dissipate the heat generated by the compressor into the indoor air, the heat lost by the indoor heat exchanger acting as the evaporator can be balanced and the indoor ambient temperature can be further increased. The outdoor heat exchanger does not participate in the heat exchange, thus eliminating the heat loss of the outdoor heat exchanger, thereby more effectively increasing the indoor temperature.

[0072] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. An air conditioner, characterized in that: include: An outdoor unit (2), the outdoor unit (2) comprising an outdoor fan (25) and a compressor (21), an outdoor heat exchanger (24) and an outdoor throttling mechanism (23) connected in sequence; An indoor unit (3), the indoor unit (3) comprising 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 end of the at least two heat exchange parts is respectively connected to the multi-way valve, and the other end is respectively connected to the outdoor throttling mechanism (23) through the indoor throttling mechanism (31) or directly, and the connection of the multi-way valve enables the at least two heat exchange parts to form a parallel structure, or at least one heat exchange part connected to the indoor throttling mechanism (31) is connected in parallel with the outdoor heat exchanger (24); in the indoor unit (3), the indoor heat exchanger comprises The multi-way valve is a three-way valve (37), wherein a first end of the first indoor heat exchanger (32) is connected to 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 to a third end of the three-way valve (37); a first end of the second indoor heat exchanger (33) is connected to the outdoor throttling mechanism (23), and a second end is connected to a second end of the three-way valve (37); a first end of the three-way valve (37) is connected to an exhaust port of a compressor (21), and a second end of the three-way valve (37) is connected to an air intake port of the compressor (21); The control mechanism (4) is used to control 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, characterized in that: In the air conditioner, the indoor throttling mechanism (31) is fully opened, the outdoor throttling mechanism (23) is partially throttled, and when the second and third ends of the three-way valve (37) are connected, the pipeline of the first indoor heat exchanger (32) and the pipeline of the second indoor heat exchanger (33) are connected in parallel and then connected to 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.

3. The air conditioner according to claim 1, characterized in that: In the air conditioner, the indoor throttling mechanism (31) is partially throttled, the outdoor throttling mechanism (23) is partially throttled, and when the first and third ends of the three-way valve (37) are connected, the pipeline of the outdoor heat exchanger (24) is connected in parallel with the pipeline of the first indoor heat exchanger (32) and then connected to 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.

4. The air conditioner according to claim 1, characterized in that: In the air conditioner, the indoor throttling mechanism (31) is partially throttled, the first and third ends of the three-way valve (37) are connected, and when the outdoor throttling mechanism (23) is completely closed, the first indoor heat exchanger (32) and the second indoor heat exchanger (33) are connected in series, the second indoor heat exchanger (33) is used as an evaporator, and the first indoor heat exchanger (32) is used as a condenser.

5. The air conditioner according to claim 1, characterized in that: The outdoor unit (2) further comprises a four-way reversing valve (22), wherein a first end of the four-way reversing valve (22) is connected to an exhaust port of the compressor (21), a second end of the four-way reversing valve (22) is connected to an outdoor heat exchanger (24), a third end of the four-way reversing valve (22) is connected to an intake port of the compressor (21); and a fourth end of the four-way reversing valve (22) is connected to a second end of the three-way valve (37).

6. The air conditioner according to claim 5, characterized in that: During the cooling or dehumidifying process of the air conditioner, the first and second ends and the third and fourth ends of the four-way reversing valve (22) of the outdoor unit are respectively connected; during the heating process of the air conditioner, the second and third ends and the first and fourth ends of the four-way reversing valve (22) of the outdoor unit are respectively connected.

7. The air conditioner according to claim 1, characterized in that: The indoor unit (3) is also provided with an indoor environment temperature sensor (35) and an indoor environment humidity sensor (36) for collecting the temperature and air humidity of the indoor environment and feeding back the collected data to the control mechanism (4).

8. A method for controlling constant temperature dehumidification of an air conditioner, using the air conditioner according to any one of claims 1 to 7, characterized in that: include: S1, compare the indoor ambient temperature with the user set temperature to obtain a comparison result; S2, based on the comparison result, controls the opening of the throttling mechanism, the state of the valve and the operating speed of the compressor, thereby controlling the operating state of at least two heat exchange parts of the indoor heat exchanger and the outdoor heat exchanger, and controlling the indoor ambient temperature to reach the set temperature while dehumidifying.

9. The control method according to claim 8, characterized in that: The step S2 comprises: If the comparison result shows that the indoor ambient temperature is higher than the user-set temperature, the indoor throttling mechanism (31) is controlled to be fully opened, and the outdoor throttling mechanism (23) is controlled to be partially throttled, and the multi-way valve is connected so that the at least two heat exchange parts of the indoor heat exchanger form a parallel structure and are used as an evaporator, and the outdoor heat exchanger (24) is used as a condenser; The throttling degree of the outdoor throttling 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), thereby reducing the indoor environment temperature to a set temperature while dehumidifying.

10. The control method according to claim 8, characterized in that: The step S2 comprises: If the comparison result is that the indoor ambient temperature is equal to the user set temperature, the indoor throttling mechanism (31) is controlled to partially throttle, and the outdoor throttling mechanism (23) is controlled to partially throttle, and the multi-way valve is connected so that at least one heat exchange part connected to the indoor throttling mechanism (31) is connected in parallel with the outdoor heat exchanger (24) to be used as a condenser; and the remaining heat exchange parts of the indoor heat exchanger are used as evaporators; The throttling degrees of the indoor throttling mechanism (31) and the outdoor throttling mechanism (23) and the operating 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.

11. The control method according to claim 8, characterized in that: The step S2 comprises: If the indoor ambient temperature is lower than the user-set temperature, the indoor throttling mechanism (31) is controlled to partially throttle, the outdoor throttling mechanism (23) is completely closed, the multi-way valve is connected so that at least one heat exchange part connected to the indoor throttling mechanism (31) is connected in parallel with the outdoor heat exchanger (24), the at least one heat exchange part connected to the indoor throttling mechanism (31) is used as a condenser, and the outdoor heat exchanger (24) does not participate in heat exchange; the remaining heat exchange parts of the indoor heat exchanger are used as evaporators; The throttling degree of the indoor throttling 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), thereby increasing the indoor environment temperature while dehumidifying.

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