Abstract:
An air conditioner ( 100 ), comprising a compressor ( 110 ), a reversing assembly ( 120 ), an outdoor heat exchanger ( 130 ), an indoor heat exchanger ( 140 ), an electric control heat sink assembly ( 150 ), a first unidirectional throttle valve ( 160 ) and a second unidirectional throttle valve ( 160′ ). The electric control heat sink assembly ( 150 ) comprises an electric control component ( 151 ) and a heat dissipation assembly ( 152 ). The first unidirectional throttle valve ( 160 ), on the flow direction from a first valve port ( 161 ) to a second valve port ( 162 ), is completely turned on. On the flow direction from the second valve port ( 162 ) to the first valve port ( 161 ), the first unidirectional throttle valve ( 160 ) is a throttle component. The second unidirectional throttle valve ( 160′ ), on the flow direction from a third valve port ( 161′ ) to a fourth valve port ( 162′ ), is completely turned on. On the flow direction from the fourth valve port ( 162′ ) to the third valve port ( 161′ ), the second unidirectional throttle valve ( 160′ ) is a throttle component.

Description:
FIELD 
       [0001]    The present disclosure relates to a field of air conditioning technology and more particularly to an air conditioner. 
       BACKGROUND 
       [0002]    With the development of air conditioning technologies, a variable frequency air conditioner has been applied widely in the industry. However, in an outdoor electrical control system of the variable frequency air conditioner, heat production of a frequency conversion module is large, which limits a high frequency operation of a compressor under a high temperature environment. A heat dissipation mode of the electrical control system which is mostly used currently is that a metal cooling fin dissipates heat through air convection. However, under the outdoor high temperature environment, the heat dissipation mode has a poor effect, and it is a common practice to reduce the heat production of the electrical control system by decreasing an operation frequency of the compressor, so as to ensure that the air conditioner operates normally, thereby greatly affecting a cooling effect of the variable frequency air conditioner when the outdoor ambient temperature during use is high and affecting the use comfortability of an user. In the existing art, the heat dissipation technology for the electrical control system of an outdoor unit through a low temperature coolant has problems that condensation water may be produced or the temperature of the electrical control system of the outdoor unit drops too much, which affects use reliability and safety of the electrical control system. For example, in Chinese patent publication No. CN102844980, titled “Refrigeration Apparatus”, not only a product is hard to be formed due to a complicated refrigeration system design, poor processability, complex program control and high cost, but also an energy efficiency loss is great because in a refrigeration circulation, a throttled part of a coolant may absorb heat of a power device. 
       SUMMARY 
       [0003]    Embodiments of the present disclosure seek to solve at least one of the problems existing in the related art to at least some extent. To this end, the present disclosure provides an air conditioner, which has advantages of good use performance and high stability. 
         [0004]    The air conditioner according to embodiments of the present disclosure includes: a compressor having a discharge port and a return port; a reversing assembly including a first port, a second port, a third port and a fourth port, in which the first port is communicated with one of the second port and the third port, and the fourth port is communicated with the other of the second port and the third port, the first port is connected to the discharge port and the fourth port is connected to the return port; an outdoor heat exchanger and an indoor heat exchanger, in which a first end of the outdoor heat exchanger is connected to the second port, and a first end of the indoor heat exchanger is connected to the third port; a heat sink assembly including an electrical control element and a heat dissipation subassembly for heat dissipation of the electrical control element, in which the heat dissipation subassembly is in series connection between a second end of the indoor heat exchanger and a second end of the outdoor heat exchanger; a first one-way throttle valve including a first valve port and a second valve port, in which the first valve port is connected to the second end of the outdoor heat exchanger and the second valve port is connected to the heat dissipation subassembly, in a flowing direction from the first valve port to the second valve port, the first one-way throttle valve is fully turned on, and in a flowing direction from the second valve port to the first valve port, the first one-way throttle valve is a throttling element; and a second one-way throttle valve including a third valve port and a fourth valve port, in which the third valve port is connected to the second end of the indoor heat exchanger, and the fourth valve port is connected to the heat dissipation subassembly, in a flowing direction from the third valve port to the fourth valve port, the second one-way throttle valve is fully turned on, and in a flowing direction from the fourth valve port to the third valve port, the second one-way throttle valve is a throttling element. 
         [0005]    In the air conditioner according to embodiments of the present disclosure, by disposing the first one-way throttle valve and the second one-way throttle valve in series connection between the outdoor heat exchanger and the indoor heat exchanger, when the coolant flows from the outdoor heat exchanger to the indoor heat exchanger, the first one-way throttle valve will be fully turned on for circulation and the second one-way throttle valve will play a role of throttling. When the coolant flows from the indoor heat exchanger to the outdoor heat exchanger, the second one-way throttle valve will be fully turned on for circulation and the first one-way throttle valve will play the role of throttling. Thus, whether the air conditioner is under a refrigeration mode or a heating mode, the coolant may dissipate heat for the electrical control element, thereby reducing the temperature of the electrical control element, improving the working stability of the electrical control element, simplifying the structure of the air conditioner and reducing the production cost. At the same time, as the coolant is not throttled before flowing into the heat dissipation subassembly, the production of condensed water is effectively reduced, the refrigeration and heat effects of the air conditioner are improved, and the using performance and market competitiveness of the air conditioner are enhanced. 
         [0006]    Preferably, the reversing assembly is configured as a four-way valve. 
         [0007]    According to an embodiment of the present disclosure, the heat dissipation subassembly includes: a heat dissipation pipe in series connection between the indoor heat exchanger and the outdoor heat exchanger; and a heat dissipation casing, in which the heat dissipation pipe is disposed to the heat dissipation casing, and the heat dissipation casing is in contact with the electrical control element for the heat dissipation of the electrical control element. 
         [0008]    Furthermore, the heat dissipation casing includes: a heat dissipation substrate in contact with the electrical control element; and a fixed baffle disposed to the heat dissipation substrate, in which an accommodating space for accommodating the heat dissipation pipe is defined between the fixed baffle and the heat dissipation substrate. 
         [0009]    In an embodiment of the present disclosure, two ends of the heat dissipation pipe extend out from opposite sidewalls of the heat dissipation casing, so as to be connected to the first one-way throttle valve and the second one-way throttle valve respectively. 
         [0010]    In another embodiment of the present disclosure, the two ends of the heat dissipation pipe extend out from the same side of the heat dissipation casing, so as to be connected to the first one-way throttle valve and the second one-way throttle valve respectively. 
         [0011]    Optionally, an end surface of the heat dissipation substrate facing the fixed baffle is provided with a first groove, an end surface of the fixed baffle facing the heat dissipation substrate is provided with a second groove, and the first groove and the second groove are fitted to define the accommodating space. 
         [0012]    Preferably, cross sections of the first groove and the second groove are configured to be semicircle separately. 
         [0013]    Preferably, the fixed baffle is provided with a fixed column, the heat dissipation substrate is provided with a fixed hole, and the fixed column and the fixed hole are connected by riveting. 
         [0014]    Preferably, the accommodating space has the same shape as the heat dissipation pipe. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0015]      FIG. 1  is a schematic view of an air conditioner according to an embodiment of the present disclosure; 
           [0016]      FIG. 2  is a sectional view of a first one-way throttle valve shown in  FIG. 1 ; 
           [0017]      FIG. 3  and  FIG. 4  are sectional views of a heat sink assembly according to different embodiments of the present disclosure. 
       
    
    
     REFERENCE NUMERALS 
       [0018]    Air conditioner  100 , 
         [0019]    Compressor  110 , discharge port  111 , return port  112 , 
         [0020]    Reversing assembly  120 , first port  121 , second port  122 , third port  123 , fourth port  124 , 
         [0021]    Outdoor heat exchanger  130 , first end  131  of the outdoor heat exchanger, second end  132  of the outdoor heat exchanger, 
         [0022]    Indoor heat exchanger  140 , first end  141  of the indoor heat exchanger, second end  142  of the indoor heat exchanger, 
         [0023]    Heat sink assembly  150 , electrical control element  151 , 
         [0024]    Heat dissipation subassembly  152 , heat dissipation pipe  1521 , heat dissipation casing  1522 , heat dissipation substrate  1523 , fixed baffle  1524 , accommodating space  1525 , 
         [0025]    First one-way throttle valve  160 , first valve port  161 , second valve port  162 , 
         [0026]    Second one-way throttle valve  160 ′, third valve port  161 ′, fourth valve port  162 ′, 
         [0027]    Casing  163 , chamber  1631 , 
         [0028]    Valve plug  164 , passage  1641 , first segment  1642 , second segment  1643 , communicating hole  1644 , 
         [0029]    Movable part  165 , throttling channel  1651 . 
       DETAILED DESCRIPTION 
       [0030]    Reference will be made in detail to embodiments of the present disclosure. The embodiments described herein with reference to drawings are explanatory, illustrative, and used to generally understand the present disclosure. The embodiments shall not be construed to limit the present disclosure. 
         [0031]    In the following, an air conditioner  100  according to embodiments of the present disclosure will be described in detail with reference to  FIGS. 1-4 . 
         [0032]    As shown in  FIGS. 1-4 , the air conditioner  100  according to embodiments of the present disclosure includes a compressor  110 , a reversing assembly  120 , an outdoor heat exchanger  130 , an indoor heat exchanger  140 , a heat sink assembly  150 , a first one-way throttle valve  160  and a second one-way throttle valve  160 ′. 
         [0033]    Specifically, the compressor  110  has a discharge port  111  and a return port  112 . After being compressed into gas of high temperature and high pressure by the compressor  110 , a coolant is discharged from the discharge port  111 . Then after a cycle, the coolant returns to the compressor  110  through the return port  112 . The reversing assembly  120  includes a first port  121 , a second port  122 , a third port  123  and a fourth port  124 , in which the first port  121  is communicated with one of the second port  122  and the third port  123 , and the fourth port  124  is communicated with another one of the second port  122  and the third port  123 , the first port  121  is connected to the discharge port  111  and the fourth port  124  is connected to the return port  112 . A first end  131  of the outdoor heat exchanger is connected to the second port  122  and a first end  141  of the indoor heat exchanger is connected to the third port  123 . 
         [0034]    As shown in  FIG. 1  and  FIG. 2 , the heat sink assembly  150  may include an electrical control element  151  and a heat dissipation subassembly  152  for heat dissipation of the electrical control element  151 . The heat dissipation subassembly  152  is in series connection between a second end  142  of the indoor heat exchanger and a second end  132  of the outdoor heat exchanger. It should be noted that, during operation of the air conditioner  100 , the electrical control element  151  is a heating element, and in order to ensure working stability of the electrical control element  151 , the heat dissipation subassembly  152  is needed for heat dissipation of the electrical control element  151 . 
         [0035]    As shown in  FIG. 2 , the first one-way throttle valve  160  includes a first valve port  161  and a second valve port  162 . The first valve port  161  is connected to the second end  132  of the outdoor heat exchanger and the second valve port  162  is connected to the heat dissipation subassembly  152 . In a flowing direction from the first valve port  161  to the second valve port  162 , the first one-way throttle valve  160  is fully turned on, and only acts as a connecting pipe. In a flowing direction from the second valve port  162  to the first valve port  161 , the first one-way throttle valve  160  is a throttling valve, which plays a role of throttling. The term “fully turned on” herein means that as pressure at both ends of the first one-way throttle valve  160  is substantially equal, the first one-way throttle valve  160  only acts as the connecting pipe instead of playing the role of throttling, and the coolant may flow smoothly from the first valve port  161  to the second valve port  162 . 
         [0036]    The second one-way throttle valve  160 ′ includes a third valve port  161 ′ and a fourth valve port  162 ′. The third valve port  161 ′ is connected to the second end  142  of the indoor heat exchanger, and the fourth valve port  162 ′ is connected to the heat dissipation subassembly  152 . In a flowing direction from the third valve port  161 ′ to the fourth valve port  162 ′, the second one-way throttle valve  160 ′ is fully turned on, and only acts as a connecting pipe. In a flowing direction from the fourth valve port  162 ′ to the third valve port  161 ′, the second one-way throttle valve  160 ′ is a throttling valve, which plays a role of throttling. The term “fully turned on” herein means that as pressure at both ends of the second one-way throttle valve  160 ′ is substantially equal, the second one-way throttle valve  160 ′ only acts as the connecting pipe instead of playing the role of throttling, and the coolant may flow smoothly from to the third valve port  161 ′ to the fourth valve port  162 ′. 
         [0037]    In the following, the first one-way throttle valve  160  is taken as an example for describing the structure of the first one-way throttle valve  160  and a flowing process of the coolant in the first one-way throttle valve  160  in detail. It should be noted that, the structure of the second one-way throttle valve  160 ′ is the same as that of the first one-way throttle valve  160 , and the flowing process of the coolant in the second one-way throttle valve  160 ′ is the same as that in the first one-way throttle valve  160 , which will not be elaborated herein. 
         [0038]    For example, in the embodiment shown in  FIG. 2 , the first one-way throttle valve  160  may include a casing  163 , a valve plug  164  and a movable part  165 . The casing  163  has a chamber  1631  therein, and the valve plug  164  is disposed in the chamber  1631 . The valve plug  164  is provided with a passage  1641  communicated with the chamber  1631 . A first end of the passage  1641  is located adjacent to the first valve port  161  and the second end of the passage  1641  is located adjacent to the second valve port  162 . The passage  1641  includes a first segment  1642 , and a second segment  1643  communicated with the first segment  1642 . A cross sectional area of the first segment  1642  is smaller than that of the second segment  1643 . An outer circumferential wall of the first segment  1642  fits closely with an inner wall of the chamber  1631 , a gap is provided between an outer circumferential wall of the second segment  1643  and the inner wall of the chamber  1631 , and a side wall of the second segment  1643  is provided with a plurality of communicating holes  1644  communicated with the chamber  1631 . Preferably, a sum of cross sectional areas of the plurality of communicating holes  1644  is larger than or equal to a cross sectional area of the second segment  1643 . The movable part  165  is slidably disposed in the second segment  1643  so as to open or close the communicating hole  1644 , and an outer circumferential wall of the movable part  165  fits closely with an inner wall of the second segment  1643 . The movable part  165  is provided with a throttling channel  1651 . A first end of the throttling channel  1651  is located adjacent to the first valve port  161 , and a second end of the throttling channel  1651  is located adjacent to the second valve port  162 . A cross sectional area of the throttling channel  1651  is far smaller than the cross sectional area of the second segment  1643 . When the movable part  165  moves to a position adjacent to the second valve port  162 , the communicating hole  1644  is opened by the movable part  165 , and the second segment  1643  of the passage  1641  may be communicated with the chamber  1631  through the communicating hole  1644 . When the movable part  165  moves to a position adjacent to the first valve port  161 , the communicating hole  1644  is closed by the movable part  165 , the passage  1641  cannot be communicated with the chamber  1631  through the communicating hole  1644 , and the coolant is communicated with the chamber  1631  through the throttling channel  1651 . 
         [0039]    When the coolant flows from the first valve port  161  to the second valve port  162 , as along a direction shown by arrow C of  FIG. 2 , the coolant enters the chamber  1631  from the first valve port  161 , and then enters the first segment  1642  of the passage  1641  through the first end of the passage  1641  of the valve plug  164 . Under the drive of the coolant, the movable part  165  moves along the direction shown by arrow C in the second segment  1643 , and the movable part  165  opens the communicating hole  1644 . After entering the second segment  1643  from the first segment  1642 , the coolant enters the chamber  1631  through the communicating hole  1644 , and at the time the first one-way throttle valve  160  only acts as the connecting pipe, i.e., the pressure at both sides of the passage  1641  is substantially equal. When the coolant flows to the first valve port  161  from the second valve port  162 , as along a direction shown by arrow d of  FIG. 2 , the coolant enters the chamber  1631  from the second valve port  162 , and then enters into the second segment  1643  of the passage  1641  through the second end of the passage  1641  of the valve plug  164 . Under the drive of the coolant, the movable part  165  moves along the direction shown by arrow d in the second segment  1643 , and the movable part closes the communicating hole  1644 . After entering the second segment  1643  from the chamber  1631 , the coolant enters the first segment  1642  through the throttling channel  1651 , then flows out from the first end of the passage  1641 , and enters the chamber  1631 . As the cross sectional area of the throttling channel  1651  is far smaller than the cross sectional area of the second segment  1643 , the pressure at both sides of the passage  1641  is greatly different, and at the time the first one-way throttle valve  160  plays the role of throttling. 
         [0040]    In the following, a working process of the air conditioner  100  according to embodiments of the present disclosure will be described in detail with reference to  FIG. 1  and  FIG. 2 . 
         [0041]    As shown in  FIG. 1 , when the air conditioner  100  is in a refrigeration mode, with respect to the reversing assembly  120 , the first port  121  is communicated with the second port  122 , and the third port  123  is communicated with the fourth port  124 . As in a direction shown by arrow a of  FIG. 1 , after being compressed into the gas of high temperature and high pressure by the compressor  110 , the coolant is discharged from the discharge port  111 . The coolant enters the reversing assembly  120  from the first port  121 , flows through the second port  122  of the reversing assembly  120  and the first end  131  of the outdoor heat exchanger successively, and then enters the outdoor heat exchanger  130 . As shown in  FIG. 1  and  FIG. 2 , after flowing out from the second end  132  of the outdoor heat exchanger, the coolant enters the first one-way throttle valve  160  from the first valve port  161  of the first one-way throttle valve  160  and flows out from the second valve port  162  of the first one-way throttle valve  160 . The first one-way throttle valve  160  is fully turned on, and only acts as the connecting pipe. 
         [0042]    After flowing out from the second valve port  162  of the first one-way throttle valve  160 , the coolant flows through the heat dissipation subassembly  152 , then enters the second one-way throttle valve  160 ′ from the fourth valve port  162 ′ of the second one-way throttle valve  160 ′, and flows from the fourth valve port  162 ′ to the third valve port  161 ′. At the time the second one-way throttle valve  160 ′ plays the role of throttling. 
         [0043]    After flowing out from the third valve port  161 ′, the coolant enters the indoor heat exchanger  140  from the second end  142  of the indoor heat exchanger, flows out from the first end  141  of the indoor heat exchanger, then enters the reversing assembly  120  from the third port  123  of the reversing assembly  120 , and returns to the compressor  110  after flowing through the fourth port  124  and the return port  112  successively. So far the air conditioner  100  has accomplished the refrigerating process. 
         [0044]    It should be noted that, under the refrigeration mode of the air conditioner  100 , the gaseous coolant of high temperature and high pressure, discharged from the discharge port  111 , is condensed to dissipate heat in the outdoor heat exchanger  130 , and the temperature of the coolant flowing out from the outdoor heat exchanger  130  is slightly above the environment temperature. Because at the time the first one-way throttle valve  160  is fully turned on and does not play the role of throttling, and only the second one-way throttle valve  160 ′ plays the role of throttling as the throttling element, the temperature of the coolant remains substantially unchanged when flowing through the first one-way throttle valve  160 , i.e., the temperature of the coolant is still slightly above the environment temperature. When flowing through the heat dissipation subassembly  152 , the coolant, whose temperature is slightly above the environment temperature, may dissipate heat for the electrical control element  151  and may prevent the production of the condensed water. The coolant throttled by the second one-way throttle valve  160 ′ enters the indoor heat exchanger  140  and evaporates to absorb heat in the indoor heat exchanger  140 , and eventually returns to the compressor  110 . 
         [0045]    Thus, under the refrigeration mode of the air conditioner  100 , the coolant may dissipate heat for the electrical control element  151  effectively, thereby reducing the temperature of the electrical control element  151  and improving the stability of the electrical control element  151 . In addition, as the temperature of the coolant flowing out from the outdoor heat exchanger  130  is slightly above the environment temperature, the coolant may reduce the production of the condensed water effectively during the heat dissipation for the electrical control element  151 , thereby further improving the working stability of the electrical control element  151 . 
         [0046]    As shown in  FIG. 1 , when the air conditioner  100  is in a heating mode, with respect to the reversing assembly  120 , the first port  121  is communicated with the third port  123 , and the second port  122  is communicated with the fourth port  124 . As in a direction shown by arrow b of  FIG. 1 , after being compressed into the gas of high temperature and high pressure by the compressor  110 , the coolant is discharged from the discharge port  111 . The coolant enters the reversing assembly  120  from the first port  121 , flows through the third port  123  of the reversing assembly  120  and the first end  141  of the indoor heat exchanger successively, and then enters into the indoor heat exchanger  140 . After flowing out from the second end  142  of the indoor heat exchanger, the coolant enters the second one-way throttle valve  160 ′ from the third valve port  161 ′ of the second one-way throttle valve  160 ′ and flows from the third valve port  161 ′ to the fourth valve port  162 ′. At the time the second one-way throttle valve  160 ′ is fully turned on, and does not play the role of throttling. 
         [0047]    When flowing out from the fourth valve port  162 ′, the coolant flows through the heat dissipation subassembly  152 , then enters the first one-way throttle valve  160  from the second valve port  162  of the first one-way throttle valve  160 , and flows from the second valve port  162  to the first valve port  161 . At the time, the first one-way throttle valve  160  functions as the throttling element and plays the role of throttling. The coolant flowing out from the first valve port  161  of the first one-way throttle valve  160  enters the outdoor heat exchanger  130  from the second end  132  of the outdoor heat exchanger, and flows out from the first end  131  of the outdoor heat exchanger. The coolant enters the reversing assembly  120  from the second port  122  and returns to the compressor  110  after flowing through the fourth port  124  and the return port  112  successively. So far the air conditioner  100  has accomplished the heating process. 
         [0048]    It should be noted that, under the heating mode of the air conditioner  100 , the gaseous coolant of high temperature and high pressure, discharged from the discharge port  111 , is condensed to dissipate heat in the indoor heat exchanger  140 , and the temperature of the coolant flowing out from the indoor heat exchanger  140  is above the environment temperature. Because the second one-way throttle valve  160 ′ is fully turned on and does not play the role of throttling, the temperature of the coolant, whose the temperature is above the environment temperature, remains substantially unchanged when the coolant flows through the second one-way throttle valve  160 ′, and all the coolant flowing out from the second one-way throttle valve  160 ′ will enter the heat dissipation subassembly  152 , such that the coolant may dissipate heat for the electrical control element  151  and may reduce the production of the condensed water. After flowing through the heat dissipation subassembly  152 , the coolant enters the first one-way throttle valve  160  from the second valve port  162  and flows out from the first valve port  161  of the first one-way throttle valve  160 . As the first one-way throttle valve  160  functions as the throttling element and has the role of throttling, after entering the outdoor heat exchanger  130 , the coolant evaporates to absorb heat and eventually returns to the compressor  110 . 
         [0049]    Thus, under the heating mode of the air conditioner  100 , the coolant may dissipate heat for the electrical control element  151  effectively, thereby reducing the temperature of the electrical control element  151  and improving the stability of the electrical control element  151 . In addition, as the coolant is not throttled before flowing into the heat dissipation subassembly  152 , the temperature of the coolant is above the environment temperature, thereby reducing the production of the condensed water effectively. 
         [0050]    Moreover, whether the air conditioner  100  is under the refrigeration mode or the heating mode, all the coolant may flow through the heat dissipation subassembly  152 . As the flux of the coolant is large, it is possible to achieve a good effect of reducing the temperature of the electrical control element  151 , thereby improving the working stability of the electrical control element  151 , and then improving the using performance of the air conditioner  100 . Moreover, compared with the related art, the air conditioner  100  according to embodiments of the present disclosure has a simpler structure, thereby simplifying a control system, being easy to form the products, and hence reducing the production cost. 
         [0051]    In the air conditioner  100  according to embodiments of the present disclosure, by disposing the first one-way throttle valve  160  and the second one-way throttle valve  160 ′ in series connection between the outdoor heat exchanger  130  and the indoor heat exchanger  140 , when the coolant flows from the outdoor heat exchanger  130  to the indoor heat exchanger  140 , the first one-way throttle valve  160  will be fully turned on for circulation and the second one-way throttle valve  160 ′ will play the role of throttling. When the coolant flows from the indoor heat exchanger  140  to the outdoor heat exchanger  130 , the second one-way throttle valve  160 ′ will be fully turned on for circulation and the first one-way throttle valve  160  will play the role of throttling. Thus whether the air conditioner  100  is under the refrigeration mode or the heating mode, the coolant may dissipate heat for the electrical control element  151 , thereby reducing the temperature of the electrical control element  151 , improving the working stability of the electrical control element  151 , simplifying the structure of the air conditioner  100  and reducing the production cost. At the same time, as the coolant is not throttled before flowing into the heat dissipation subassembly  152 , the production of condensed water is effectively reduced, the refrigeration and heat effects of the air conditioner  100  are improved, and hence the using performance and market competitiveness of the air conditioner  100  are enhanced. 
         [0052]    It could be understood that, the structure of the reversing assembly  120  is not particularly limited. The reversing assembly  120  may include a first pipe, a second pipe, a third pipe and a fourth pipe. The first pipe, the second pipe, the third pipe and the fourth pipe are connected head-to-tail in sequence. A first electromagnetic valve is connected to the first pipe in series, and a second electromagnetic valve is connected to the second pipe in series. A third electromagnetic valve is connected to the third pipe in series, and a fourth electromagnetic valve is connected to the fourth pipe in series. The junction of the first pipe and the second pipe defines a first connecting port c, and the junction of the first pipe and the fourth pipe defines a second connecting port d. The junction of the fourth pipe and the third pipe defines a fourth connecting port f, and the junction of the third pipe and the second pipe defines a third connecting port e. The first electromagnetic valve and the third electromagnetic valve open or close at the same time, and the second electromagnetic valve and the fourth electromagnetic valve open or close at the same time. In a preferable embodiment of the present disclosure, the reversing assembly  120  may be configured as a four-way valve. 
         [0053]    As shown in  FIG. 3  and  FIG. 4 , according to an embodiment of the present disclosure, the heat dissipation subassembly  152  may include: a heat dissipation pipe  1521  and a heat dissipation casing  1522 . Preferably, the heat dissipation pipe  1521  is configured as a copper pipe. Thus, a heat exchange efficiency of the heat dissipation pipe  1521  may be improved. The heat dissipation pipe  1521  is in series connection between the indoor heat exchanger  140  and the outdoor heat exchanger  130 , and the coolant may flow in the heat dissipation pipe  1521 . The heat dissipation pipe  1521  is disposed to the heat dissipation casing  1522 , and the heat dissipation casing  1522  is in contact with the electrical control element  151  for the heat dissipation of the electrical control element  151 , thus improving a heat dissipation efficiency of the heat dissipation subassembly  152  and ensuring the operation stability of the electrical control element  151 . 
         [0054]    Furthermore, the heat dissipation casing  1522  may include: a heat dissipation substrate  1523  and a fixed baffle  1524 . The heat dissipation substrate  1523  is in contact with the electrical control element  151 , and the heat of the electrical control element  151  may be directly transferred to the heat dissipation substrate  1523 . The fixed baffle  1524  is disposed to the heat dissipation substrate  1523 , so the fixed baffle  1524  may exchange heat with the heat dissipation substrate  1523  directly. It could be understood that, a connection mode between the fixed baffle  1524  and the heat dissipation substrate  1523  is not specially limited. For example, in embodiments shown in  FIG. 3  and  FIG. 4 , the fixed baffle  1524  fits closely with the heat dissipation substrate  1523 . Furthermore, the fixed baffle  1524  is provided with a fixed column (not shown in the drawings), the heat dissipation substrate  1523  is provided with a fixed hole (not shown in the drawings), and the fixed column and the fixed hole are connected by riveting, thus enlarging a contact area between the fixed baffle  1524  and the heat dissipation substrate  1523 , and further improving the heat exchange efficiency between the fixed baffle  1524  and the heat dissipation substrate  1523 . 
         [0055]    To further improve the heat dissipation efficiency of the heat dissipation subassembly  152 , an accommodating space  1525  for accommodating the heat dissipation pipe  1521  is defined between the fixed baffle  1524  and the heat dissipation substrate  1523 , thus enlarging a heat exchange area between the fixed baffle  1524  and the heat dissipation pipe  1521 , thereby further improving the heat dissipation efficiency of the heat dissipation subassembly  152  and ensuring the operation stability of the electrical control element  151 . Preferably, the accommodating space  1525  has the same shape as the heat dissipation pipe  1521 , thus further enlarging the contact area between the heat dissipation pipe  1521  with the fixed baffle  1524  and the heat dissipation substrate  1523 . The heat dissipation pipe  1521  may exchange heat with the fixed baffle  1524  and the heat dissipation substrate  1523  directly. 
         [0056]    For example, in the embodiments shown in  FIG. 3  and  FIG. 4 , an end surface of the heat dissipation substrate  1523  facing the fixed baffle  1524  is provided with a first groove, an end surface of the fixed baffle  1524  facing the heat dissipation substrate  1523  is provided with a second groove, and the first groove and the second groove are fitted to define the accommodating space  1525 , thus facilitating the installation of the heat dissipation pipe  1521  to the heat dissipation casing  1522 , and also enlarging the contact area between the heat dissipation pipe  1521  with the heat dissipation substrate  1523  and the fixed baffle  1524 . To facilitate the processing, in an embodiment of the present disclosure, cross sections of the first groove and the second groove are configured to be semicircle separately. 
         [0057]    In the embodiment shown in  FIG. 3 , for improving the heat dissipation efficiency of the heat dissipation subassembly  152 , two ends of the heat dissipation pipe  1521  extend out from opposite sidewalls of the heat dissipation casing  1522 , so as to be connected to the first one-way throttle valve  160  and the second one-way throttle valve  160 ′ respectively. Certainly, positions of the two ends of the heat dissipation pipe  1521  are not limited to this. For further improving the heat dissipation efficiency of the heat dissipation subassembly  152 , for example, in the embodiment shown in  FIG. 4 , the two ends of the heat dissipation pipe  1521  extend out from the same side of the heat dissipation casing  1522 , so as to be connected to the first one-way throttle valve  160  and the second one-way throttle valve  160 ′ respectively. For example, the heat dissipation pipe  1521  may be formed as a U-shaped structure, thus prolonging a length of the heat dissipation pipe  1521  in the heat dissipation casing  1522 , thereby enlarging the contact area between the heat dissipation pipe  1521  with the heat dissipation substrate  1523  and the fixed baffle  1524 , and further improving the heat dissipation efficiency of the heat dissipation subassembly  152 . 
         [0058]    It is verified by experiments that, under the same working conditions and compared with the air conditioner of the related art, in the air conditioner  100  according to embodiments of the present disclosure, the temperature of the electrical control element  151  may be reduced by more than 15° C. and the high temperature operation frequency of the compressor  110  may be improved by 20 Hz. When the outdoor temperature is above 35° C., the high temperature refrigerating capacity of the air conditioner  100  according to embodiments of the present disclosure is improved by more than 10% compared with the air conditioner of the related art. When the outdoor temperature is above 55° C., the high temperature refrigerating capacity of the air conditioner  100  according to embodiments of the present disclosure is improved by more than 20% compared with the air conditioner of the related art. 
         [0059]    In the specification, it is to be understood that terms such as “central,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” and “counterclockwise” should be construed to refer to the orientation as then described or as shown in the drawings under discussion. These relative terms are for convenience of description and do not require that the present invention be constructed or operated in a particular orientation. 
         [0060]    In addition, terms such as “first” and “second” are used herein for purposes of description and are not intended to indicate or imply relative importance or significance or to imply the number of indicated technical features. Thus, the feature defined with “first” and “second” may comprise one or more of this feature. In the description of the present invention, “a plurality of” means two or more than two, unless specified otherwise. 
         [0061]    In the present invention, unless specified or limited otherwise, the terms “mounted,” “connected,” “coupled,” “fixed” and the like are used broadly, and may be, for example, fixed connections, detachable connections, or integral connections; may also be mechanical or electrical connections; may also be direct connections or indirect connections via intervening structures; may also be inner communications of two elements, which can be understood by those skilled in the art according to specific situations. 
         [0062]    In the present invention, unless specified or limited otherwise, a structure in which a first feature is “on” or “below” a second feature may include an embodiment in which the first feature is in direct contact with the second feature, and may also include an embodiment in which the first feature and the second feature are not in direct contact with each other, but are contacted via an additional feature formed therebetween. Furthermore, a first feature “on,” “above,” or “on top of” a second feature may include an embodiment in which the first feature is right or obliquely “on,” “above,” or “on top of” the second feature, or just means that the first feature is at a height higher than that of the second feature; while a first feature “below,” “under,” or “on bottom of” a second feature may include an embodiment in which the first feature is right or obliquely “below,” “under,” or “on bottom of” the second feature, or just means that the first feature is at a height lower than that of the second feature. 
         [0063]    Reference throughout this specification to “an embodiment,” “some embodiments,” “one embodiment”, “another example,” “an example,” “a specific example,” or “some examples,” means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. Thus, the appearances of the phrases such as “in some embodiments,” “in one embodiment”, “in an embodiment”, “in another example,” “in an example,” “in a specific example,” or “in some examples,” in various places throughout this specification are not necessarily referring to the same embodiment or example of the present disclosure. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples. 
         [0064]    Although explanatory embodiments have been shown and described, it would be appreciated by those skilled in the art that the above embodiments cannot be construed to limit the present disclosure, and changes, alternatives, and modifications can be made in the embodiments without departing from spirit, principles and scope of the present disclosure.