Patent Application
20150276278
1. Field of the Invention
The present invention relates to a split type cold and warm air conditioner, and in particular relates to a high performance split type cold and warm air conditioner capable of switching refrigerant circulation loops to provide an applicable heat exchange proportion of a condenser to an evaporator when producing cold or warm air.
2. Description of the Related Art
In conventional split type cold and warm air conditioners using devices such as a four-way valve to change flow directions of a refrigerant, an indoor or outdoor heat exchanger can be alternatively served as an evaporator to produce cold air or served as a condenser to produce warm air, so that the produced warm air can increase room temperature in cold days and the produced cold air can decrease room temperature in hot days. In these conventional air conditioners, an energy match of the condenser and the evaporator can be obtained if the heat dissipation area of the condenser substantially is 20% to 30% greater than that of the evaporator. Therefore, in a four-way-valve cold and warm air conditioner of taking a cold air function as a primary design, a heat dissipation area of an outdoor heat exchanger must be greater than that of an indoor heat exchanger so as to obtain a better cold air performance, but resulting in an inferior warm air function. Besides, in a four-way-valve cold and warm air conditioner of taking a warm air function as a primary design, a heat dissipation area of an indoor heat exchanger must be greater than that of an outdoor heat exchanger so as to obtain a better warm air performance, but resulting in an inferior cold air function. A pressure difference formed between pipelines located at both sides of the four-way valve is about 10 atmosphere pressure when the cold and warm air conditioner is operated. Thus, if the cold and warm air conditioner is required to switch from a cold air function to a warm air function, vice versa, when in use, the cold and warm air conditioner shall be stopped for couple minutes until the pressure difference between pipelines located at both sides of the four-way valve drops to a predetermined minimum value. Moreover, the four-way valve is expensive due to structural complexity, generally of reducing performance due to imperfect sealing of the high and low pressure pipelines after a period of operating time.
In view of this, the invention provides a high performance split type cold and warm air conditioner for solving the defects in conventional skills.
The split type cold and warm air conditioner of the present invention comprises an air conditioning system comprising an outdoor unit and an indoor unit. The outdoor unit comprises a first heat exchanger, a second heat exchanger, a first fan, a compressor, an accumulator and a capillary tube. The indoor unit comprises a third heat exchanger, a fourth heat exchanger and a second fan. A first pipeline configured with a first three-way joint is utilized for connecting the first heat exchanger and the second heat exchanger. A second pipeline configured with a second three-way joint is utilized for connecting the third heat exchanger and the fourth heat exchanger. A third pipeline comprises a first end connected to the compressor and comprises a second end connected to a third three-way joint. A fourth pipeline configured with a first solenoid valve comprises a first end connected to the third three-way joint and comprises a second end connected to the second heat exchanger. A fifth pipeline configured with the capillary tube comprises a first end connected to the first heat exchanger and comprises a second end connected to the third heat exchanger. A sixth pipeline configured with a second solenoid valve comprises a first end connected to the second three-way joint and a second end connected to the accumulator. A seventh pipeline configured with a third solenoid valve comprises a first end connected to the fourth heat exchanger and comprises a second end connected to the third three-way joint. An eighth pipeline configured with a fourth solenoid valve comprises a first end connected to the accumulator and comprises a second end connected to the first three-way joint. A ninth pipeline comprises a first end connected to the accumulator and comprises a second end connected to the compressor. Accordingly, a first refrigerant circulation loop is constituted to provide a cold air function when the first solenoid valve and the second solenoid valve are in an open state and when the third solenoid valve and the fourth solenoid valve are in a closed state, and a second refrigerant circulation loop is constituted to provide a warm air function when the first solenoid valve and the second solenoid valve are in a closed state with the third solenoid valve and the fourth solenoid valve being in an open state.
Preferably, a heat dissipation area of the second heat exchanger is 0.05 to 0.5 times that of the first heat exchanger, a heat dissipation area of the fourth heat exchanger is 0.05 to 0.5 times that of the third heat exchanger, a summation of the heat dissipation area of the first heat exchanger and the heat dissipation area of the second heat exchanger is greater than the heat dissipation area of the third heat exchanger, and a summation of the heat dissipation area of the third heat exchanger and the heat dissipation area of the fourth heat exchanger is greater than the heat dissipation area of the first heat exchanger. When the cold and warm air conditioner of the present invention provides a cold air function, the first heat exchanger and the second heat exchanger are serially connected and served as a condenser, and the third heat exchanger is served as an evaporator. When the cold and warm air conditioner of the present invention provides a warm air function, the third heat exchanger and the fourth heat exchanger are serially connected and served as a condenser, and the first heat exchanger is served as an evaporator. According to the local maximum outdoor air temperature and the temperature of the condenser, an optimal proportion of the condenser to the evaporator in the cold air function can be adequately set. According to the indoor set temperature and the temperature of the evaporator, an optimal proportion of the condenser to the evaporator in the warm air function can be adequately set. Therefore, according to the different local maximum outdoor air, set indoor, condenser and evaporator temperatures, the sizes of the first and second heat exchangers and the sizes of the third and fourth heat exchangers can be set, thereby providing cold air function in hot days and warm air function in cold days with good performances, respectively.
Preferably, the split type cold and warm air conditioner further comprises a control unit which is electrically connected to the air conditioning system, the first, second, third and fourth solenoid valves.
The split type cold and warm air conditioner of the present invention is advantageously provided with following efficacies. Firstly, the first refrigerant circulation loop and the second refrigerant circulation loop can be constituted by switching the first, second, third and fourth solenoid valves. Further, a heat exchanging ratio of between the outdoor unit and the indoor unit can be regulated by regulating the first, second, third and fourth heat exchangers, so that the cold and warm air conditioner can provide high performance when producing cold or warm air. Secondly, the present invention is capable of directly switching cold and warm air functions when in use, viz needed not to switch off power to balance the big pressure difference between the four-way valve for several minutes as the conventional cold and warm air conditioners did. Further, the solenoid valve utilized in the present invention has a simple and reliable structure, eliminating defects of reducing performance of the four-way valve type machine due to imperfect sealing of the high and low pressure pipelines after a period of operating time.
A detailed description is given in the following embodiments with reference to the accompanying drawings.
The present invention can be more fully understood by reading the subsequent detailed description and examples with references made to the accompanying drawings, wherein:
The following description is of the best-contemplated mode of carrying out the invention. This description is made for the purpose of illustrating the general principles of the present invention and should not be taken in a limiting sense. The scope of the present invention is best determined by reference to the appended claims.
A third pipeline 23 comprises a first end connected to the compressor 115 of the outdoor unit 11 and comprises a second end connected to a third three-way joint 33.
A fourth pipeline 24 configured with a first solenoid valve 41 thereon comprises a first end connected to the third three-way joint 33 and comprises a second end connected to the second heat exchanger 112 of the outdoor unit 11.
A fifth pipeline 25 configured with the capillary tube 116 of the outdoor unit 11 thereon comprises a first end connected to the first heat exchanger 111 of the outdoor unit 11 and comprises a second end connected to the third heat exchanger 121 of the indoor unit 12.
A sixth pipeline 26 configured with a second solenoid valve 42 thereon comprises a first end connected to the second three-way joint 32 and comprises a second end connected to the accumulator 114 of the outdoor unit 11.
A seventh pipeline 27 configured with a third solenoid valve 43 thereon comprises a first end connected to the fourth heat exchanger 122 of the indoor unit 12 and comprises a second end connected to the third three-way joint 33.
An eighth pipeline 28 configured with a fourth solenoid valve 44 thereon comprises a first end connected to the accumulator 114 of the outdoor unit 11 and comprises a second end connected to the first three-way joint 31.
A ninth pipeline 29 comprises a first end connected to the accumulator 114 of the outdoor unit 11 and comprises a second end connected to the compressor 115 of the outdoor unit 11.
The split type cold and warm air conditioner further comprises a control unit 5 which is electrically connected to the air conditioning system 1, the first solenoid valve 41, the second solenoid valve 42, the third solenoid valve 43 and the fourth solenoid valve 44 for controlling the operation of the air conditioning system 1. Besides, the first solenoid valve 41, the second solenoid valve 42, the third solenoid valve 43 and the fourth solenoid valve 44 are switched on or off to control the flow direction of refrigerant.
The liquid refrigerant can be prevented from entering the compressor 115 by the accumulator 114 of the outdoor unit 11, so that valve component of the compressor 115 can be protected from damages.
The invention can be suitably applied to following various circumstances according to different purposes.
Referring to
Referring to
While the invention has been described by way of example and in terms of the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. To the contrary, it is intended to cover various modifications and similar arrangements (as would be apparent to those skilled in the art). Therefore, the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements.
