Heat exchange system and refrigeration apparatus

Abstract

The application provides a heat exchange system and a refrigeration equipment, wherein the heat exchange system comprises a compressor, a first three-way element, a condenser, a first throttling device, an evaporator, a second three-way element and a second throttling device, the compressor comprises a suction port and a discharge port; the first three-way element comprises a first port, a second port and a third port, the second three-way element comprises a fourth port, a fifth port and a sixth port; wherein, in the case that the heat exchange system is in a refrigeration mode, the discharge port and the condenser are connected in communication through the first port and the second port, and the evaporator and the suction port are connected in communication through the fourth port and the fifth port; in the case that the heat exchange system is in a defrosting mode, the discharge port and the evaporator are connected in communication through the first port and the third port, and the second throttling device and the suction port are connected in communication through the fourth port and the sixth port.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration equipment, in particular to a heat exchange system and a refrigeration equipment. BACKGROUND

[0002] In the related art, the conventional low-temperature refrigeration equipment such as a refrigerator usually uses electric heating to defrost, which makes the refrigeration capacity of the refrigerator low, the start-up rate high, and the energy consumption low. SUMMARY

[0003] The present application aims to at least solve or improve the technical problem of low refrigeration capacity and low energy consumption of the refrigeration equipment such as a refrigerator in the prior art.

[0004] To this end, the first aspect of the present application provides a heat exchange system.

[0005] The second aspect of the present application provides a refrigeration equipment.

[0006] Therefore, according to the first aspect of the present application, the present application provides a heat exchange system, comprising: a compressor, the compressor comprising a suction port and a discharge port; a first three-way element, the first three-way element comprising a first port, a second port and a third port, the first port being in communication with the discharge port; a condenser, the condenser being in communication with the second port; a first throttling member, the first throttling member being in communication with the condenser; an evaporator, the evaporator being in communication with the first throttling member and the third port; a second three-way element, the second three-way element comprising a fourth port, a fifth port and a sixth port, the fourth port being in communication with the suction port, the fifth port being in communication with the evaporator; a second throttling member, the second throttling member being in parallel with the first throttling member and in communication with the evaporator, the second throttling member being further in communication with the sixth port; wherein, in a case that the heat exchange system is in a refrigeration mode, the discharge port and the condenser are in communication through the first port and the second port, and the evaporator and the suction port are in communication through the fourth port and the fifth port; in a case that the heat exchange system is in a defrosting mode, the discharge port and the evaporator are in communication through the first port and the third port, and the second throttling member and the suction port are in communication through the fourth port and the sixth port.

[0007] The heat exchange system provided by the present application comprises a compressor, a first three-way element, a condenser, a first throttling member, an evaporator, a second three-way element and a second throttling member.

[0008] The suction port and the discharge port are arranged on the compressor, the first three-way element is provided with three ports, i.e., a first port, a second port and a third port, and the second three-way element is provided with three ports, i.e., a fourth port, a fifth port and a sixth port.

[0009] Specifically, the suction port of the compressor and the fourth port of the second three-way element are in communication, and the discharge port of the compressor and the first port of the first three-way element are in communication.

[0010] The first port of the first three-way element is connected to the discharge port of the compressor, the second port of the first three-way element is connected to one end of the condenser, and the third port of the first three-way element is connected to the other end of the evaporator.

[0011] One end of the condenser is connected to the discharge port of the compressor, and the other end of the condenser is connected to one end of the first throttling element.

[0012] One end of the first throttling element is connected to the other end of the condenser, and the other end of the first throttling element is connected to one end of the evaporator.

[0013] One end of the evaporator is connected to the other end of the first throttling element, one end of the evaporator is also connected to one end of the second throttling element, the other end of the evaporator is connected to the fifth port of the second three-way element, and the other end of the evaporator is also connected to the third port of the first three-way element.

[0014] One end of the second throttling element is connected to one end of the evaporator, and the other end of the second throttling element is connected to the sixth port of the second three-way element.

[0015] The fourth port of the second three-way element is connected to the suction port of the compressor, the fifth port of the second three-way element is connected to the other end of the evaporator, and the sixth port of the second three-way element is connected to the other end of the second throttling element.

[0016] Further, in cooperation with the conduction states of the first port, the second port and the third port on the first three-way element, and the fourth port, the fifth port and the sixth port on the second three-way element, the heat exchange system can form two loops, corresponding to the refrigeration mode and the defrosting mode of the heat exchange system.

[0017] Specifically, when the heat exchange system is in the refrigeration mode, the first port and the second port of the first three-way element are in the conduction state, and the third port is in the cut-off state, that is, the discharge port of the compressor and the condenser are connected through the first port and the second port of the first three-way element; the fourth port and the fifth port of the second three-way element are in the conduction state, and the sixth port is in the cut-off state, that is, the evaporator and the suction port of the compressor are connected through the fourth port and the fifth port of the second three-way element.

[0018] In this state, the refrigerant is compressed by the compressor, discharged through the discharge port, then enters the first three-way element through the first port of the first three-way element, discharged through the second port of the first three-way element, then enters the condenser to condense, then enters the first throttling element for throttling, the throttled refrigerant enters the evaporator for evaporation, then enters the second three-way element through the fifth port of the second three-way element, then is discharged through the fourth port, and then enters the compressor through the suction port of the compressor, realizing the refrigeration cycle of the refrigerant.

[0019] In the defrosting mode of the heat exchange system, the first port and the third port of the first three-way element are in the on state, and the second port is in the off state, that is, the discharge port of the compressor and the evaporator are connected through the first port and the third port of the first three-way element; the fourth port and the sixth port of the second three-way element are in the on state, and the fifth port is in the off state, that is, the second throttling element and the suction port of the compressor are connected through the fourth port and the sixth port of the second three-way element.

[0020] In this state, the refrigerant is compressed by the compressor, discharged through the discharge port, enters the first three-way element through the first port of the first three-way element, discharged through the third port of the first three-way element, enters the evaporator for defrosting, enters the second throttling element for throttling, enters the second three-way element through the sixth port of the second three-way element, and is discharged through the fourth port, and enters the compressor through the suction port of the compressor, realizing the defrosting cycle of the refrigerant.

[0021] Further, by adjusting the speed of the compressor, defrosting can be ensured at different environmental temperatures, and the heat exchange system can provide maximum heat to ensure complete defrosting and improve defrosting efficiency.

[0022] In addition, the low-temperature and low-pressure refrigerant does not pass through the condenser during defrosting, and the condenser can quickly reach a high-pressure state after defrosting, so that the heat exchange system can quickly enter the refrigeration state.

[0023] In addition, by changing the flow mode of the refrigerant, defrosting can be realized, and electric heating defrosting can be cancelled to save costs.

[0024] In addition, the heat exchange system in the above technical solution provided by the application can further have the following additional technical features:

[0025] On the basis of the above technical solution, further comprising: a first pipe, one end of which is connected to the evaporator, and the other end is connected to the first throttling element, and the first pipe is connected to the second throttling element.

[0026] In this technical solution, the heat exchange system further comprises a first pipe connecting the evaporator and the first throttling element, and the second throttling element is directly connected to the first pipe, thereby reducing the length of the pipeline between the second throttling element and the evaporator and reducing costs.

[0027] On the basis of any of the above technical solutions, further comprising: a second pipe, one end of which is connected to the evaporator, and the other end is connected to the fifth port, and the second pipe is connected to the third port.

[0028] In the technical scheme, the heat exchange system further comprises a second pipe connected with the fifth port of the evaporator and the second connecting element, and the third port of the first connecting element is directly connected with the second pipe, so that the length of the pipeline between the third port of the first connecting element and the evaporator is reduced, and the cost is reduced.

[0029] On the basis of any of the above technical schemes, further comprising: a first filter element arranged on the flow path between the condenser and the first throttling element.

[0030] In the technical scheme, the heat exchange system further comprises a first filter element arranged between the condenser and the first throttling element, so that when the heat exchange system is in the refrigeration mode, the refrigerant passes through the condenser, is filtered by the first filter element, and then enters the first throttling element, and since the first throttling element has a small passage area, the first filter element is arranged to filter the refrigerant, thereby reducing the risk of the first throttling element being blocked.

[0031] On the basis of any of the above technical schemes, further comprising: a second filter element arranged on the flow path between the second throttling element and the evaporator.

[0032] In the technical scheme, the heat exchange system further comprises a second filter element arranged between the second throttling element and the evaporator, so that when the heat exchange system is in the defrosting mode, the refrigerant passes through the evaporator, is filtered by the second filter element, and then enters the second throttling element, and since the second throttling element has a small passage area, the second filter element is arranged to filter the refrigerant, thereby reducing the risk of the second throttling element being blocked.

[0033] On the basis of any of the above technical schemes, further comprising: the first throttling element is a first capillary tube; and / or the second throttling element is a second capillary tube.

[0034] In the technical scheme, the first throttling element is a capillary tube, thereby reducing the cost and improving the stability of throttling; and / or the second throttling element is a capillary tube, thereby reducing the cost and improving the stability of throttling.

[0035] On the basis of any of the above technical schemes, further comprising: the first three-way element is a first three-way valve; and / or the second three-way element is a second three-way valve.

[0036] In the technical scheme, the first three-way element is a first three-way valve, thereby facilitating control of the states of the first port, the second port and the third port; and / or the second three-way element is a second three-way valve, thereby facilitating control of the states of the fourth port, the fifth port and the sixth port.

[0037] On the basis of any of the above technical schemes, further comprising: a first fan arranged corresponding to the condenser; and a second fan arranged corresponding to the evaporator.

[0038] In the technical solution, the heat exchange system further comprises a first fan arranged correspondingly to the first heat exchanger, and the first fan can accelerate the airflow flowing through the first heat exchanger, thereby improving the heat exchange effect of the first heat exchanger.

[0039] The heat exchange system further comprises a second fan arranged correspondingly to the second heat exchanger, and the second fan can accelerate the airflow flowing through the second heat exchanger, thereby improving the heat exchange effect of the second heat exchanger.

[0040] On the basis of any of the above technical solutions, further, the compressor comprises a cylinder body, a suction pipe connected to the cylinder body, and a suction inlet arranged on the suction pipe; and an exhaust pipe connected to the cylinder body, and an exhaust outlet arranged on the exhaust pipe.

[0041] In the technical solution, the compressor comprises a cylinder body, and a suction pipe and an exhaust pipe arranged on the cylinder body, a suction inlet arranged on the suction pipe, and an exhaust outlet arranged on the exhaust pipe, and the compressor is connected to the second three-way element through the suction pipe, and the compressor is connected to the first three-way element through the exhaust pipe, thereby facilitating the assembly of the heat exchange system.

[0042] According to the second aspect of the present application, the present application provides a refrigeration device comprising the heat exchange system according to any of the above technical solutions.

[0043] The refrigeration device according to the present application comprises the heat exchange system according to any of the above technical solutions, and thus has all the beneficial effects of the heat exchange system according to any of the above technical solutions, which will not be repeated here.

[0044] Additional aspects and advantages of the present application will become apparent from the following description with reference to specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0045] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0046] Figure 1 A schematic view of the heat exchange system according to an embodiment of the present application in a refrigeration mode is shown;

[0047] Figure 2 A schematic view of the heat exchange system according to an embodiment of the present application in a defrosting mode is shown;

[0048] Figure 3 A schematic view of the structure of the compressor in the heat exchange system according to an embodiment of the present application is shown;

[0049] Figure 4 A schematic view of the pressure-enthalpy of the refrigerant circulation in the defrosting process of the heat exchange system according to an embodiment of the present application is shown.

[0050] wherein, Figures 1 to 3 The correspondence between the reference signs and the component names in the drawings is as follows:

[0051] 100 heat exchange system, 110 compressor, 112 suction port, 114 discharge port, 116 cylinder, 118 suction pipe, 120 discharge pipe, 122 process pipe, 130 first three-way element, 132 first port, 134 second port, 136 third port, 140 condenser, 142 first condensing port, 144 second condensing port, 150 first throttling element, 152 first throttling port, 154 second throttling port, 160 evaporator, 162 first evaporating port, 164 second evaporating port, 170 second three-way element, 172 fourth port, 174 fifth port, 176 sixth port, 180 second throttling element, 182 third throttling port, 184 fourth throttling port, 190 first pipe, 200 second pipe, 210 first filter element, 212 first filter port, 214 second filter port, 220 second filter element, 222 third filter port, 224 fourth filter port, 230 first fan, 240 second fan. DETAILED DESCRIPTION

[0052] In order to enable persons skilled in the art to more clearly understand the above-mentioned objects, features and advantages of the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0053] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application, however, the present application can also be implemented in other ways different from those described herein, and therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0054] The heat exchange system 100 and the refrigeration equipment according to some embodiments of the present application will be described below with reference to Figures 1 to 4 .

[0055] As shown in Figure 1 and Figure 2 , according to a first aspect of the present application, the present application provides a heat exchange system 100, comprising a compressor 110, a first three-way element 130, a condenser 140, a first throttling element 150, an evaporator 160, a second three-way element 170 and a second throttling element 180, the above components form a circulation flow, and two operation modes of refrigeration and defrosting can be realized.

[0056] The compressor 110 comprises a suction port 112 and a discharge port 114; the first three-way element 130 comprises a first port 132, a second port 134 and a third port 136, the first port 132 is communicated with the discharge port 114 of the compressor 110; the condenser 140 comprises a first condensing port 142 and a second condensing port 144, the first condensing port 142 is communicated with the second port 134 of the first three-way element 130; the first throttling element 150 comprises a first throttling port 152 and a second throttling port 154, the first throttling port 152 is communicated with the second condensing port 144 of the condenser 140; the evaporator 160 comprises a first evaporating port 162 and a second evaporating port 164, the first evaporating port 162 is communicated with the second throttling port 154 of the first throttling element 150, and the second evaporating port 164 is communicated with the third port 136 of the first three-way element 130; the second three-way element 170 comprises a fourth port 172, a fifth port 174 and a sixth port 176, the fourth port 172 is communicated with the suction port 112 of the compressor 110, and the fifth port 174 is communicated with the second evaporating port 164 of the evaporator 160; the second throttling element 180 comprises a third throttling port 182 and a fourth throttling port 184, the third throttling port 182 is communicated with the first evaporating port 162 of the evaporator 160, and the first throttling element 150 and the second throttling element 180 are arranged in parallel, and the fourth throttling port 184 is communicated with the sixth port 176 of the second three-way element 170; when the heat exchange system 100 is in the refrigeration mode, the discharge port 114 of the compressor 110 and the first condensing port 142 of the condenser 140 are communicated through the first port 132 and the second port 134 of the first three-way element 130, and the second evaporating port 164 of the evaporator 160 and the suction port 112 of the compressor 110 are communicated through the fourth port 172 and the fifth port 174 of the second three-way element 170; when the heat exchange system 100 is in the defrosting mode, the discharge port 114 of the compressor 110 and the second evaporating port 164 of the evaporator 160 are communicated through the first port 132 and the third port 136 of the first three-way element 130, and the fourth throttling port 184 of the second throttling element 180 and the suction port 112 of the compressor 110 are communicated through the fourth port 172 and the sixth port 176 of the second three-way element 170.

[0057] The heat exchange system 100 provided by the application comprises a compressor 110, a first three-way element 130, a condenser 140, a first throttling element 150, an evaporator 160, a second three-way element 170 and a second throttling element 180.

[0058] The compressor 110 is provided with a suction port 112 and a discharge port 114, the first three-way element 130 is provided with three ports, i.e., a first port 132, a second port 134 and a third port 136, the condenser 140 is provided with a first condensing port 142 and a second condensing port 144, the first throttling member 150 is provided with a first throttling port 152 and a second throttling port 154, the evaporator 160 is provided with a first evaporating port 162 and a second evaporating port 164, the second three-way element 170 is provided with three ports, i.e., a fourth port 172, a fifth port 174 and a sixth port 176, and the second throttling member 180 is provided with a third throttling port 182 and a fourth throttling port 184.

[0059] Specifically, the suction port 112 of the compressor 110 is connected to the fourth port 172 of the second three-way element 170, and the discharge port 114 of the compressor 110 is connected to the first port 132 of the first three-way element 130.

[0060] The first port 132 of the first three-way element 130 is connected to the discharge port 114 of the compressor 110, the second port 134 of the first three-way element 130 is connected to the first condensing port 142 of the condenser 140, and the third port 136 of the first three-way element 130 is connected to the second evaporating port 164 of the evaporator 160.

[0061] The first condensing port 142 of the condenser 140 is connected to the discharge port 114 of the compressor 110, and the second condensing port 144 of the condenser 140 is connected to the first throttling port 152 of the first throttling member 150.

[0062] The first throttling port 152 of the first throttling member 150 is connected to the second condensing port 144 of the condenser 140, and the second throttling port 154 of the first throttling member 150 is connected to the first evaporating port 162 of the evaporator 160.

[0063] The first evaporating port 162 of the evaporator 160 is connected to the second throttling port 154 of the first throttling member 150, the first evaporating port 162 of the evaporator 160 is also connected to the third throttling port 182 of the second throttling member 180, the second evaporating port 164 of the evaporator 160 is connected to the fifth port 174 of the second three-way element 170, and the second evaporating port 164 of the evaporator 160 is also connected to the third port 136 of the first three-way element 130.

[0064] The third throttling port 182 of the second throttling member 180 is connected to the first evaporating port 162 of the evaporator 160, and the fourth throttling port 184 of the second throttling member 180 is connected to the sixth port 176 of the second three-way element 170.

[0065] The fourth port 172 of the second three-way element 170 is connected to the suction port 112 of the compressor 110, the fifth port 174 of the second three-way element 170 is connected to the second evaporation port 164 of the evaporator 160, and the sixth port 176 of the second three-way element 170 is connected to the fourth throttling port 184 of the second throttling element 180.

[0066] Furthermore, by coordinating the conduction states of the first port 132, the second port 134, and the third port 136 on the first three-way element 130, and the fourth port 172, the fifth port 174, and the sixth port 176 on the second three-way element 170, the heat exchange system 100 can form two loops, corresponding to the cooling mode and the defrosting mode of the heat exchange system 100, respectively.

[0067] Specifically, such as Figure 1 As shown, when the heat exchange system 100 is in cooling mode, the first port 132 and the second port 134 of the first three-way element 130 are in a conductive state, and the third port 136 is in a closed state, that is, the discharge port 114 of the compressor 110 and the condenser 140 are connected through the first port 132 and the second port 134 of the first three-way element 130; the fourth port 172 and the fifth port 174 of the second three-way element 170 are in a conductive state, and the sixth port 176 is in a closed state, that is, the evaporator 160 and the suction port 112 of the compressor 110 are connected through the fourth port 172 and the fifth port 174 of the second three-way element 170.

[0068] In this state, the refrigerant is compressed by the compressor 110 and discharged through the outlet 114. Then, it enters the first three-way element 130 through the first port 132 and is discharged through the second port 134. After that, it enters the condenser 140 through the first condensing port 142 and is condensed. The medium-temperature liquid refrigerant is discharged through the second condensing port 144. Then, it enters the first throttling element 150 through the first throttling port 152 for throttling and is discharged through the second throttling port 154. The throttled refrigerant enters the evaporator 160 through the first evaporating port 162 for evaporation and is discharged through the second evaporating port 164. Then, it enters the second three-way element 170 through the fifth port 174 and is discharged through the fourth port 172. Finally, it enters the compressor 110 through the suction port, thus realizing the refrigerant refrigeration cycle.

[0069] like Figure 2As shown, in the case that the heat exchange system 100 is in the defrosting mode, the first port 132 and the third port 136 of the first three-way element 130 are in the on state, and the second port 134 is in the off state, that is, the discharge port 114 of the compressor 110 and the evaporator 160 are connected and communicated through the first port 132 and the third port 136 of the first three-way element 130; the fourth port 172 and the sixth port 176 of the second three-way element 170 are in the on state, and the fifth port 174 is in the off state, that is, the second throttling piece 180 and the suction port 112 of the compressor 110 are connected and communicated through the fourth port 172 and the sixth port 176 of the second three-way element 170.

[0070] In this state, after the refrigerant is compressed by the compressor 110, the high-temperature and high-pressure gaseous refrigerant is discharged through the discharge port 114, then enters the first three-way element 130 through the first port 132 of the first three-way element 130, is discharged through the third port 136 of the first three-way element 130, then enters the evaporator 160 through the second evaporation port 164 of the evaporator 160, and then the refrigerant releases heat in the coil of the evaporator 160, and is converted into medium-temperature and high-pressure subcooled liquid refrigerant, then enters the second throttling piece 180 through the third throttling port 182 for throttling, and discharges low-pressure gaseous refrigerant through the fourth throttling port 184, then enters the second three-way element 170 through the sixth port 176 of the second three-way element 170, then is discharged through the fourth port 172, and then enters the compressor 110 through the suction port of the compressor 110, to realize the defrosting circulation of the refrigerant.

[0071] Further, by adjusting the rotating speed of the compressor 110, the defrosting under different environmental temperatures can be ensured, and the heat exchange system 100 can provide maximum heat to ensure complete defrosting and improve the defrosting efficiency.

[0072] In addition, the low-temperature and low-pressure refrigerant does not pass through the condenser 140 during defrosting, and the condenser 140 can quickly reach a high-pressure state after defrosting, so that the heat exchange system 100 can quickly enter the refrigeration state.

[0073] In addition, by changing the refrigerant flow mode to realize defrosting, the electric heating defrosting can be cancelled, the defrosting efficiency effect is improved, the defrosting energy consumption is reduced, and the cost is saved.

[0074] Specifically, the refrigerant state change of the heat exchange system 100 in the defrosting mode is as shown in the figure. Figure 4 As shown, A is a gas-liquid mixed state, B is a gaseous state, and C is a gaseous state, and then the refrigerant circulates between the gas-liquid mixed state at A, the gaseous state at B and the gaseous state at C in the process of the operation of the compressor 110.

[0075] As shown in the figure, Figure 1 and Figure 2As shown, as a possible embodiment of the present invention, the heat exchange system 100 further includes: a first pipe 190 disposed between the evaporator 160 and the first throttling element 150, one end of the first pipe 190 being connected to the first evaporation port 162 of the evaporator 160, the other end of the first pipe 190 being connected to the second throttling port 154 of the first throttling element 150, and the third throttling port 182 of the second throttling element 180 being connected to the first pipe 190.

[0076] In this embodiment, the heat exchange system 100 further includes a first pipe 190 connecting the evaporator 160 and the first throttling element 150, and a second throttling element 180 directly connected to the first pipe 190, thereby reducing the pipe length between the second throttling element 180 and the evaporator 160 and reducing costs.

[0077] like Figure 1 and Figure 2 As shown, as a possible embodiment of the present invention, the heat exchange system 100 further includes a second pipe 200 connected between the evaporator 160 and the second three-way element 170. One end of the second pipe 200 is connected to the second evaporation port 164 of the evaporator 160, and the other end of the second pipe 200 is connected to the fifth port 174 of the second three-way element 170. Furthermore, the third port 136 of the first three-way element 130 is connected to the second pipe 200.

[0078] In this embodiment, the heat exchange system 100 further includes a second pipe 200 that connects the evaporator 160 and the fifth port 174 of the second connector. The third port 136 of the first connector and the second pipe 200 are directly connected, thereby reducing the pipe length between the third port 136 of the first connector and the evaporator 160 and reducing costs.

[0079] like Figure 1 and Figure 2 As shown, as a possible embodiment of the present invention, the heat exchange system 100 further includes a first filter element 210 disposed between the condenser 140 and the first throttling element 150. The first filter element 210 includes a first filter port 212 and a second filter port 214. The first filter port 212 is connected to the second condensing port 144 of the condenser 140, and the second filter port 214 is connected to the first throttling port 152 of the first throttling element 150.

[0080] In this embodiment, the heat exchange system 100 further includes a first filter element 210 disposed between the condenser 140 and the first throttling element 150. When the heat exchange system 100 is in cooling mode, the refrigerant passes through the condenser 140, is filtered by the first filter element 210, and then enters the first throttling element 150. Since the passage area of ​​the first throttling element 150 is small, the first filter element 210 is provided to filter the refrigerant, reducing the risk of the first throttling element 150 being blocked.

[0081] Specifically, such as Figure 1 As shown, when the heat exchange system 100 is in cooling mode, the first port 132 and the second port 134 of the first three-way element 130 are in a conductive state, and the third port 136 is in a closed state, that is, the discharge port 114 of the compressor 110 and the condenser 140 are connected through the first port 132 and the second port 134 of the first three-way element 130; the fourth port 172 and the fifth port 174 of the second three-way element 170 are in a conductive state, and the sixth port 176 is in a closed state, that is, the evaporator 160 and the suction port 112 of the compressor 110 are connected through the fourth port 172 and the fifth port 174 of the second three-way element 170.

[0082] In this state, the refrigerant is compressed by the compressor 110 and discharged through the outlet 114. It then enters the first three-way element 130 through the first port 132, and exits through the second port 134. Afterward, it enters the condenser 140 through the first condensing port 142 and condenses there. The medium-temperature liquid refrigerant is then discharged through the second condensing port 144. Finally, it enters the first filter element 210 through the first filter port 212, exits through the second filter port 214, and then... The refrigerant enters the first throttling port 152 of the first throttling device 150 for throttling, and is discharged through the second throttling port 154 in a gas-liquid two-phase state. The throttled refrigerant enters the evaporator 160 through the first evaporation port 162 for evaporation, and is then discharged through the second evaporation port 164. After that, it enters the second three-way element 170 through the fifth port 174, and is then discharged through the fourth port 172. Finally, it enters the compressor 110 through the suction port of the compressor 110, thus realizing the refrigerant refrigeration cycle.

[0083] like Figure 1 and Figure 2As shown, as one possible embodiment of the present application, further, the heat exchange system 100 further comprises a second filter 220 arranged between the second throttling element 180 and the evaporator 160, the second filter 220 comprising a third filter port 222 and a fourth filter port 224, the third filter port 222 being in communication with the first evaporation port 162 of the evaporator 160, and the fourth filter port 224 being in communication with the third throttling port 182 of the second throttling element 180.

[0084] In this embodiment, the heat exchange system 100 further comprises a second filter 220 arranged between the second throttling element 180 and the evaporator 160, so that when the heat exchange system 100 is in the defrosting mode, the refrigerant passes through the evaporator 160, is filtered by the second filter 220, and then enters the second throttling element 180. Since the second throttling element 180 has a small passage area, the second filter 220 is arranged to filter the refrigerant and reduce the risk of the second throttling element 180 being blocked.

[0085] Specifically, as shown, Figure 2 In the case where the heat exchange system 100 is in the defrosting mode, the first port 132 and the third port 136 of the first three-way element 130 are in the conducting state, and the second port 134 is in the cut-off state, i.e., the discharge port 114 of the compressor 110 and the evaporator 160 are connected through the first port 132 and the third port 136 of the first three-way element 130; the fourth port 172 and the sixth port 176 of the second three-way element 170 are in the conducting state, and the fifth port 174 is in the cut-off state, i.e., the second throttling element 180 and the suction port 112 of the compressor 110 are connected through the fourth port 172 and the sixth port 176 of the second three-way element 170.

[0086] In this state, the refrigerant is compressed by the compressor 110, and then the high-temperature and high-pressure gaseous refrigerant is discharged through the discharge port 114. Then, the refrigerant enters the first three-way element 130 through the first port 132 of the first three-way element 130, is discharged through the third port 136 of the first three-way element 130, enters the evaporator 160 through the second evaporation port 164 of the evaporator 160, and then releases heat in the coil of the evaporator 160 to become medium-temperature and high-pressure subcooled liquid refrigerant. Then, the refrigerant enters the third filter through the third filter port 222 and is discharged through the fourth filter port 224. Then, the refrigerant enters the second throttling element 180 through the third throttling port 182 for throttling, and is discharged through the fourth throttling port 184 to become low-pressure gaseous refrigerant. Then, the refrigerant enters the second three-way element 170 through the sixth port 176 of the second three-way element 170, is discharged through the fourth port 172, and then enters the compressor 110 through the suction port of the compressor 110, to realize the defrosting cycle of the refrigerant.

[0087] The third filter port 222 of the second filter 220 is connected to the first pipe 190.

[0088] As shown in Figure 1 and Figure 2 , as a possible embodiment of the present application, further, the first throttling member 150 is a first capillary tube.

[0089] In this embodiment, the first throttling member 150 is a capillary tube, thereby reducing the cost and improving the stability of throttling.

[0090] As shown in Figure 1 and Figure 2 , as a possible embodiment of the present application, further, the second throttling member 180 is a second capillary tube.

[0091] In this embodiment, the second throttling member 180 is a capillary tube, thereby reducing the cost and improving the stability of throttling.

[0092] As a possible embodiment of the present application, further, the first three-way element 130 is a first three-way valve.

[0093] In this embodiment, the first three-way element 130 is a first three-way valve, thereby facilitating the control of the states of the first port 132, the second port 134 and the third port 136.

[0094] Specifically, the first three-way element 130 includes a first wiring terminal, which is connected to a controller of the refrigeration equipment and can control the conduction state between the first port 132, the second port 134 and the third port 136 on the first three-way element 130.

[0095] As a possible embodiment of the present application, further, the second three-way element 170 is a second three-way valve.

[0096] In this embodiment, the second three-way element 170 is a second three-way valve, thereby facilitating the control of the states of the fourth port 172, the fifth port 174 and the sixth port 176.

[0097] Specifically, the second three-way element 170 includes a second wiring terminal, which is connected to a controller of the refrigeration equipment and can control the conduction state between the fourth port 172, the fifth port 174 and the sixth port 176 on the second three-way element 170.

[0098] As shown in Figure 1 and Figure 2 , as a possible embodiment of the present application, further, the heat exchange system 100 further includes a first fan 230 corresponding to the condenser 140.

[0099] In this embodiment, the heat exchange system 100 further comprises a first fan 230 corresponding to the condenser 140, and the first fan 230 can accelerate the air flow through the condenser 140, thereby improving the heat exchange effect of the condenser 140.

[0100] Specifically, the first fan 230 comprises a third connecting terminal and a first fan blade, the third connecting terminal is connected to the controller of the refrigeration equipment to control the start-stop and rotation speed of the first fan 230, and the first fan blade drives air to pass through the condenser 140 at a certain speed to form forced convection heat exchange, and the heat of the condenser 140 can be blown to the indoor.

[0101] As shown in Figure 1 and Figure 2 , as a possible embodiment of the present application, further, the heat exchange system 100 further comprises a second fan 240 corresponding to the evaporator 160.

[0102] In this embodiment, the heat exchange system 100 further comprises a second fan 240 corresponding to the evaporator 160, and the second fan 240 can accelerate the air flow through the evaporator 160, thereby improving the heat exchange effect of the evaporator 160.

[0103] Specifically, the second fan 240 comprises a fourth connecting terminal and a second fan blade, the fourth connecting terminal is connected to the controller of the refrigeration equipment to control the start-stop and rotation speed of the second fan 240, and the second fan blade drives the indoor air of the refrigeration equipment to pass through the evaporator 160 at a certain speed to form forced convection heat exchange, and the cold of the evaporator 160 can be blown to the indoor of the refrigeration equipment.

[0104] As shown in Figure 3 , as a possible embodiment of the present application, further, the compressor 110 comprises a cylinder body 116, a suction pipe 118 and a discharge pipe 120, wherein the suction pipe 118 and the discharge pipe 120 are arranged on the cylinder body 116, the suction port is arranged on the suction pipe 118, and the discharge port is arranged on the discharge pipe 120.

[0105] In this embodiment, the compressor 110 comprises a cylinder body 116, a suction pipe 118 and a discharge pipe 120 arranged on the cylinder body 116, a suction port 112 arranged on the suction pipe 118, and a discharge port 114 arranged on the discharge pipe 120, and the compressor 110 is connected with the suction pipe 118 and the second three-way element 170, and the compressor 110 is connected with the discharge pipe 120 and the first three-way element 130, thereby facilitating the assembly of the heat exchange system 100.

[0106] Further, the compressor 110 further comprises a process pipe 122 connected with the cylinder body 116, for filling refrigerant into the heat exchange system 100.

[0107] And, the suction pipe 118, the exhaust pipe 120 and the process pipe 122 are also provided with welding interfaces to realize the connection with the cylinder body 116.

[0108] The cylinder body 116 is provided with a piston compression cylinder.

[0109] According to the second aspect of the present application, the present application provides a refrigeration equipment, comprising the heat exchange system 100 provided in the above-mentioned first aspect embodiment.

[0110] The refrigeration equipment provided by the present application has all the beneficial effects of the heat exchange system 100 provided in the above-mentioned first aspect embodiment, and thus will not be described one by one here.

[0111] Specifically, the refrigeration equipment can be a refrigerator.

[0112] In the defrosting mode, the low-temperature and low-pressure refrigerant does not pass through the condenser 140. Since the condenser 140 of the refrigeration equipment is usually attached to the two sides of the side plate of the refrigeration equipment, the possibility of condensation on the box of the refrigeration equipment can be reduced. The refrigeration equipment can cancel the electric heating defrosting, improve the defrosting efficiency, reduce the defrosting energy consumption, reduce the temperature difference between the freezing compartments, prolong the food preservation period, and avoid the problem of condensation on the side wall of the refrigeration equipment when defrosting, improve the reliability of the refrigeration equipment, improve the quality of the refrigeration equipment, and quickly establish high pressure in the condenser 140 after defrosting. The heat exchange system 100 can quickly enter the refrigeration state.

[0113] In the present application, the terms "first", "second", "third" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance; the term "multiple" refers to two or more, unless otherwise explicitly limited. The terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, "connecting" can be fixed connection, or detachable connection, or integrally connected; "connected" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0114] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, and are only used for the purpose of describing the present application and simplifying the description, and do not indicate or imply that the components or units referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application.

[0115] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "certain embodiments", and the like is intended to indicate that the described implementation, feature, structure, material or characteristic is included in at least one embodiment or example of the application. The illustrative representations of the above terms in the specification are not necessarily referring to the same embodiment or example. Moreover, the described implementation, feature, structure, material or characteristic can be combined in any one or more embodiments or examples in a suitable manner.

[0116] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A heat exchange system, characterized in that, include: The compressor includes an inlet and an outlet; The first three-way component includes a first port, a second port, and a third port, wherein the first port is connected to the outlet. The condenser is connected to the second port; The first throttling element is connected to the condenser; The evaporator is connected to the first throttling element, and the evaporator is also connected to the third port; The second three-way component includes a fourth port, a fifth port, and a sixth port. The fourth port is connected to the suction port, and the fifth port is connected to the evaporator. The second throttling element is connected to the evaporator in parallel with the first throttling element, and the second throttling element is also connected to the sixth port; When the heat exchange system is in cooling mode, the outlet and the condenser are connected through the first port and the second port, and the evaporator and the suction port are connected through the fourth port and the fifth port; when the heat exchange system is in defrosting mode, the outlet and the evaporator are connected through the first port and the third port, and the second throttling device and the suction port are connected through the fourth port and the sixth port.

2. The heat exchange system according to claim 1, characterized in that, Also includes: The first tube has one end connected to the evaporator and the other end connected to the first throttling element. The first tube is also connected to the second throttling element.

3. The heat exchange system according to claim 1, characterized in that, Also includes: The second tube has one end connected to the evaporator and the other end connected to the fifth port. The second tube is also connected to the third port.

4. The heat exchange system according to any one of claims 1 to 3, characterized in that, Also includes: The first filter element is disposed in the flow path between the condenser and the first throttling element.

5. The heat exchange system according to any one of claims 1 to 3, characterized in that, Also includes: The second filter element is disposed in the flow path between the second throttling element and the evaporator.

6. The heat exchange system according to any one of claims 1 to 3, characterized in that, The first throttling element is a first capillary tube; and / or The second throttling element is the second capillary.

7. The heat exchange system according to any one of claims 1 to 3, characterized in that, The first three-way element is a first three-way valve; and / or The second three-way component is a second three-way valve.

8. The heat exchange system according to any one of claims 1 to 3, characterized in that, Also includes: A first fan is provided corresponding to the condenser; A second fan is provided corresponding to the evaporator.

9. A refrigeration device, characterized in that, include: The heat exchange system as described in any one of claims 1 to 8.

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