Heat exchange system and heat exchange device
By using a dual-loop design and refrigerant flow control, the problem of large indoor temperature fluctuations during defrosting in the heat exchange system was solved, achieving seamless defrosting and high energy efficiency.
Patent Information
- Application Number
- CN202410679493.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-11-28
Smart Images
Figure CN121025652A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of heat exchange devices, in particular to a heat exchange system and a heat exchange device. BACKGROUND
[0002] When the refrigeration equipment is operated for a long time at low temperature, the evaporator will appear the phenomenon of frosting, such as the outdoor unit of air conditioner, the evaporator of refrigerator, etc. The frosting will affect the performance of the refrigeration equipment. For the existing air conditioning system, the air conditioner reverse cycle is usually used for defrosting. In the process of reverse cycle, the high-temperature refrigerant passes through the outdoor heat exchanger for defrosting, but when passing through the indoor heat exchanger, the indoor air will be cooled, resulting in the decrease of indoor temperature, which makes the indoor temperature fluctuate greatly and affects the comfort of indoor. SUMMARY
[0003] The main purpose of the present application is to provide a heat exchange system, which aims to solve the problem of large indoor temperature fluctuation when defrosting in the existing heat exchange system.
[0004] To achieve the above-mentioned purpose, the present application provides a heat exchange system, which comprises a compressor, a switching device, a first heat exchange device and a second heat exchange device.
[0005] The first heat exchange device has a first heat exchange channel and a second heat exchange channel.
[0006] The second heat exchange device has a third heat exchange channel and a fourth heat exchange channel.
[0007] The compressor is communicated with the first heat exchange channel and the third heat exchange channel through the switching device to form a first circulation loop; the compressor is communicated with the second heat exchange channel and the fourth heat exchange channel through the switching device to form a second circulation loop.
[0008] The heat exchange system has at least a first working mode. In the first working mode, one of the first circulation loop and the second circulation loop operates a heating cycle, and the other one operates a refrigeration cycle. The refrigerant flows through one of the third heat exchange channel and the fourth heat exchange channel to condense and release heat, and the other one evaporates to absorb heat.
[0009] In an embodiment, the first heat exchange channel and the second heat exchange channel are arranged in the same shell and are arranged in heat exchange with each other.
[0010] And / or, the third heat exchange channel and the fourth heat exchange channel are arranged in the same shell and are arranged in heat exchange with each other.
[0011] In one embodiment, the second heat exchange device has a second air duct. In the first working mode, the refrigerant in the third heat exchange channel and the fourth heat exchange channel is in a condensation and heat release state, and is located upstream of the other refrigerant in an evaporation and heat absorption state along the air outlet direction of the second air duct.
[0012] And / or, in the first operating mode, the compressor operates at a high frequency, the frequency of which is not less than 80Hz.
[0013] In one embodiment, in the first operating mode, the switching device controls a portion of the refrigerant discharged from the compressor to flow through the first heat exchange channel, condense and release heat, and then flow into the third heat exchange channel to evaporate and absorb heat; another portion of the refrigerant flows through the fourth heat exchange channel, condenses and releases heat, and then flows into the second heat exchange channel to evaporate and absorb heat; the third heat exchange channel absorbs a portion of the heat released by the refrigerant in the fourth heat exchange channel.
[0014] Alternatively, in the first operating mode, the switching device controls a portion of the refrigerant discharged from the compressor to flow through the third heat exchange channel, where it condenses and releases heat before flowing into the first heat exchange channel to evaporate and absorb heat. Another portion of the refrigerant flows through the second heat exchange channel, where it condenses and releases heat before flowing into the fourth heat exchange channel to evaporate and absorb heat. The fourth heat exchange channel absorbs a portion of the heat released by the refrigerant in the third heat exchange channel.
[0015] In one embodiment, the heat exchange system has a rapid heating mode. In the rapid heating mode, the switching device controls a portion of the refrigerant discharged from the compressor to flow through the first heat exchange channel and condense and release heat, while another portion of the refrigerant flows through the second heat exchange channel and condenses and releases heat, so that both the first circulation loop and the second circulation loop operate in a heating cycle.
[0016] In one embodiment, the first heat exchange device has a first air duct. In the rapid heating mode, the second heat exchange channel is located downstream of the first heat exchange channel along the air outlet direction of the first air duct, and the refrigerant pressure flowing into the first heat exchange channel is less than the refrigerant pressure flowing into the second heat exchange channel.
[0017] In one embodiment, the compressor has a first exhaust port, a second exhaust port, and an intake port, the first exhaust port and the intake port being connected to a first circulation loop, and the second exhaust port and the intake port being connected to a second circulation loop; in the rapid heating mode, the exhaust pressure of the first exhaust port is less than the exhaust pressure of the second exhaust port.
[0018] In one embodiment, the heat exchange system further comprises:
[0019] In the first operating mode, after a preset time has elapsed in the rapid heating mode, the system enters the first working mode; and / or,
[0020] The second operating mode is activated when the ambient temperature of the second heat exchanger is detected to be lower than the target temperature, and then the first operating mode is entered.
[0021] In one embodiment, the first heat exchange device includes a first heat exchange tube and a second heat exchange tube, the first heat exchange tube having a first heat exchange channel and the second heat exchange tube having a second heat exchange channel; the first heat exchange tube and the second heat exchange tube are independent of each other and are spaced apart.
[0022] Alternatively, one of the first heat exchange tube and the second heat exchange tube may be at least partially disposed in the other, and a first flow gap for the refrigerant to pass through is provided between the first heat exchange tube and the second heat exchange tube.
[0023] In one embodiment, the second heat exchange device includes a third heat exchange tube and a fourth heat exchange tube, the third heat exchange tube having a third heat exchange channel and the fourth heat exchange tube having a fourth heat exchange channel; the third heat exchange tube and the fourth heat exchange tube are independent of each other and are spaced apart;
[0024] Alternatively, one of the third heat exchange tube and the fourth heat exchange tube may be at least partially disposed in the other, and a second flow gap for the refrigerant to pass through is provided between the third heat exchange tube and the fourth heat exchange tube.
[0025] In one embodiment, the compressor has a first exhaust port, a second exhaust port, and an intake port, wherein the first exhaust port and the intake port are connected to a first circulation loop, and the second exhaust port and the intake port are connected to a second circulation loop.
[0026] In one embodiment, the compressor is a dual-cylinder, dual-suction, dual-exhaust compressor, and the intake port includes a first sub-intake port and a second sub-intake port. The first sub-intake port is connected to the first circulation loop, and the second sub-intake port is connected to the second circulation loop.
[0027] In one embodiment, the switching device includes a first reversing valve and a second reversing valve. The first reversing valve is connected to the first circulation loop to change the refrigerant flow direction in the first circulation loop; the second reversing valve is connected to the second circulation loop to change the refrigerant flow direction in the second circulation loop.
[0028] In one embodiment, the switching device includes a first throttling element and a second throttling element. The first throttling element is disposed in the first circulation loop and located between the first heat exchange channel and the third heat exchange channel, and the second throttling element is disposed in the second circulation loop and located between the second heat exchange channel and the fourth heat exchange channel.
[0029] The present invention also proposes a heat exchange device, which includes the heat exchange system described above.
[0030] In one embodiment, the heat exchange device is an air conditioner or a refrigerator.
[0031] The heat exchange system of the present invention includes a compressor, a switching device, a first heat exchange device, and a second heat exchange device. When the heat exchange system is in the first working mode, part of the refrigerant discharged by the compressor flows along the first circulation loop and the other part flows along the second circulation loop. One of the first circulation loop and the second circulation loop operates a heating cycle, and the other operates a cooling cycle. The refrigerant flows through one of the third heat exchange channel and the fourth heat exchange channel, where it condenses and releases heat, and the other part evaporates and absorbs heat. This causes part of the refrigerant to flow to the second heat exchange device to condense and release heat for defrosting, and the other part of the refrigerant to flow to the first heat exchange device to condense and release heat for indoor heating. Finally, it returns to the compressor. This avoids the problem of large fluctuations in indoor temperature during the defrosting process, thus achieving the function of seamless defrosting.
[0032] When the first circulation loop operates in heating mode and the second circulation loop operates in cooling mode, a portion of the refrigerant discharged from the compressor flows through the first heat exchange channel in the first circulation loop to condense and release heat for indoor heating, and then flows through the third heat exchange channel for heat exchange. The other portion of the refrigerant discharged from the compressor flows through the fourth heat exchange channel in the second circulation loop to condense and release heat for outdoor defrosting, and then flows through the second heat exchange channel for heat exchange. Finally, both refrigerants return to the compressor.
[0033] When the first circulation loop is running the refrigeration cycle and the second circulation loop is running the heating cycle, a portion of the refrigerant discharged from the compressor flows through the third heat exchange channel in the first circulation loop to condense and release heat for outdoor defrosting, and then flows through the first heat exchange channel for heat exchange. The other portion of the refrigerant discharged from the compressor flows through the second heat exchange channel in the second circulation loop to condense and release heat for indoor heating, and then flows through the fourth heat exchange channel for heat exchange, and finally both return to the compressor.
[0034] Therefore, it can be seen that the heat exchange system in this solution, by setting up a compressor, uses a portion of the refrigerant discharged by the compressor for indoor heating and another portion for outdoor defrosting in the first working mode. This avoids the problem of large fluctuations in indoor temperature during the defrosting process. The heat exchange system achieves defrosting without stopping, avoids sudden changes in the indoor environment, and realizes the function of seamless defrosting. Attached Figure Description
[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0036] Figure 1 This is a schematic diagram of the structure of an embodiment of the heat exchange system of the present invention;
[0037] Figure 2 This is a schematic diagram of the structure of the heat exchange system of the present invention in rapid heating mode according to the first embodiment;
[0038] Figure 3 This is a schematic diagram of the structure of the heat exchange system of the present invention in the first operating mode according to the first embodiment of the present invention;
[0039] Figure 4 This is a schematic diagram of the structure of the second embodiment of the heat exchange system of the present invention in the first working mode;
[0040] Figure 5 This is a schematic diagram of the structure of the heat exchange system of the present invention in rapid cooling mode according to the first embodiment.
[0041] Explanation of icon numbers:
[0042] Reference Name Reference Name 10 Heat exchange system 220 Second reversing valve 100 Compressor 230 First throttling device 110 First exhaust port 240 Second throttling device 120 Second exhaust port 300 First heat exchange device 130 Suction port 310 First heat exchange passage 131 First sub-suction port 320 Second heat exchange passage 132 Second sub-suction port 400 Second heat exchange device 200 Switching device 410 Third heat exchange passage 210 First reversing valve 420 Fourth heat exchange passage
[0043] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.
[0045] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0046] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.
[0047] When refrigeration equipment operates at low temperatures for extended periods, frost will form on the evaporator, such as in the outdoor unit of an air conditioner or the evaporator of a refrigerator. This frost can negatively impact the performance of the refrigeration equipment. Existing air conditioning systems typically use reverse circulation for defrosting. During this process, the high-temperature refrigerant defrosts through the outdoor heat exchanger, but it cools the indoor air as it passes through the indoor heat exchanger, causing a drop in indoor temperature and resulting in large temperature fluctuations, affecting indoor comfort. Similarly, in existing refrigerator systems, defrosting can cause the temperature in the freezer / refrigerator compartments to rise, affecting food preservation.
[0048] To address the aforementioned problems, this invention proposes a heat exchange system that is applied to a heat exchange device. The specific type of heat exchange device is not limited, but includes, but is not limited to, air conditioners or refrigerators. This solution can resolve the problem of large indoor temperature fluctuations during defrosting in existing heat exchange systems.
[0049] Please see Figure 1 and Figure 3In one embodiment of the heat exchange system 10 of the present invention, the heat exchange system 10 includes a compressor 100, a switching device 200, a first heat exchange device 300, and a second heat exchange device 400; the first heat exchange device 300 has a first heat exchange channel 310 and a second heat exchange channel 320; the second heat exchange device 400 has a third heat exchange channel 410 and a fourth heat exchange channel 420; the compressor 100 is connected to the first heat exchange channel 310 and the third heat exchange channel 410 via the switching device 200 to form a first circulation loop; the compressor 100 is connected to the second heat exchange channel 320 and the fourth heat exchange channel 420 via the switching device 200 to form a second circulation loop; the heat exchange system 10 has at least a first operating mode, in which one of the first circulation loop and the second circulation loop operates a heating cycle, and the other operates a cooling cycle, and the refrigerant flows through one of the third heat exchange channel 410 and the fourth heat exchange channel 420, condensing and releasing heat, and the other evaporating and absorbing heat.
[0050] It is understood that the first circulation loop can operate in either a heating or cooling cycle, and the second circulation loop can operate in either a heating or cooling cycle, without being specifically limited here. This allows the heat exchange system 10 to have multiple operating modes. For example, the heat exchange system 10 can have a heating mode and / or a cooling mode. In the heating mode, the first circulation loop and / or the second circulation loop operate in a heating cycle; in the cooling mode, the first circulation loop and / or the second circulation loop operate in a cooling cycle. This allows the heat exchange system 10 to have multiple functions, thereby meeting different user needs.
[0051] In one embodiment, the heat exchange system 10 has a rapid heating mode (e.g., Figure 2 As shown, in rapid heating mode, both the first and second circulation loops operate in heating cycles. Specifically, there is one compressor 100. A portion of the refrigerant discharged from the compressor 100 flows along the first circulation loop, first through the first heat exchange channel 310 to condense and release heat for indoor heating, and then flows through the third heat exchange channel 410 for heat exchange. The other portion of the refrigerant discharged from the compressor 100 flows along the second circulation loop, first through the second heat exchange channel 320 to condense and release heat for indoor heating, and then flows through the fourth heat exchange channel 420 for heat exchange, finally returning to the compressor 100. Therefore, in this scheme, the heat exchange system 10, by setting up one compressor 100, ensures that in rapid heating mode, both the first heat exchange channel 310 and the second heat exchange channel 320 of the first heat exchange device 300 are used for indoor heating, enabling rapid indoor heating with high efficiency.
[0052] In one embodiment, the heat exchange system 10 has a rapid cooling mode (e.g., Figure 5As shown, in rapid cooling mode, both the first and second circulation loops operate in a refrigeration cycle. Specifically, there is one compressor 100. A portion of the refrigerant discharged from the compressor 100 flows along the first circulation loop, first through the third heat exchange channel 410 for heat exchange, and then through the first heat exchange channel 310 for evaporation and heat absorption, thus cooling the room. The other portion of the refrigerant discharged from the compressor 100 flows along the second circulation loop, first through the fourth heat exchange channel 420 for heat exchange, and then through the second heat exchange channel 320 for evaporation and heat absorption, thus cooling the room. Finally, both refrigerants return to the compressor 100. Therefore, in this scheme, the heat exchange system 10, by setting up one compressor 100, ensures that in rapid cooling mode, both the first heat exchange channel 310 and the second heat exchange channel 320 of the first heat exchange device 300 are used for cooling the room, enabling rapid cooling and high efficiency.
[0053] Furthermore, the heat exchange channel can be tubular, plate-shaped, or of other shapes; no specific limitation is made here. The first heat exchange channel 310 and the second heat exchange channel 320 can be located in the same housing or in different housings, as long as the first heat exchange device 300 has both the first heat exchange channel 310 and the second heat exchange channel 320. The positional relationship between the first heat exchange channel 310 and the second heat exchange channel 320 is not limited here but will be described in detail later. Similarly, the third heat exchange channel 410 and the fourth heat exchange channel 420 can be located in the same housing or in different housings; no specific limitation is made here. In addition, the switching device 200 is used to control the flow of refrigerant discharged from the compressor 100. The specific structure of the switching device 200 will be described in detail later and will not be repeated here.
[0054] The heat exchange system 10 of the present invention includes a compressor 100, a switching device 200, a first heat exchange device 300, and a second heat exchange device 400. When the heat exchange system 10 is in the first working mode, part of the refrigerant discharged by the compressor 100 flows along the first circulation loop and the other part flows along the second circulation loop. One of the first circulation loop and the second circulation loop operates a heating cycle and the other operates a cooling cycle. The refrigerant flows through one of the third heat exchange channel 410 and the fourth heat exchange channel 420, where it condenses and releases heat, and the other evaporates and absorbs heat. This causes part of the refrigerant to flow to the second heat exchange device 400 to condense and release heat for defrosting, and the other part of the refrigerant to flow to the first heat exchange device 300 to condense and release heat for indoor heating. Finally, it returns to the compressor 100. This avoids the problem of large fluctuations in indoor temperature caused by the decrease in indoor temperature during the defrosting process, thus realizing the function of imperceptible defrosting.
[0055] When the first circulation loop is operating in heating cycle and the second circulation loop is operating in cooling cycle (e.g.) Figure 3As shown, a portion of the refrigerant discharged from the compressor 100 flows through the first heat exchange channel 310 along the first circulation loop to condense and release heat for indoor heating, and then flows through the third heat exchange channel 410 for heat exchange. Another portion of the refrigerant discharged from the compressor 100 flows through the fourth heat exchange channel 420 along the second circulation loop to condense and release heat for outdoor defrosting, and then flows through the second heat exchange channel 320 for heat exchange. Finally, both refrigerants return to the compressor 100.
[0056] When the first circulation loop operates in the cooling cycle and the second circulation loop operates in the heating cycle (e.g.) Figure 4 As shown, a portion of the refrigerant discharged from the compressor 100 flows through the third heat exchange channel 410 along the first circulation loop to condense and release heat for outdoor defrosting, and then flows through the first heat exchange channel 310 for heat exchange. Another portion of the refrigerant discharged from the compressor 100 flows through the second heat exchange channel 320 along the second circulation loop to condense and release heat for indoor heating, and then flows through the fourth heat exchange channel 420 for heat exchange. Finally, both refrigerants return to the compressor 100.
[0057] Therefore, it can be seen that the heat exchange system 10 in this solution, by setting up a compressor 100, in the first working mode, uses part of the refrigerant discharged by the compressor 100 for indoor heating and the other part for outdoor defrosting, thereby avoiding the problem of large fluctuations in indoor temperature caused by the decrease in indoor temperature during the defrosting process. The compressor 100 has high energy efficiency, and the heat exchange system 10 realizes defrosting without stopping, avoiding sudden changes in indoor environment and realizing the function of imperceptible defrosting.
[0058] Please see Figure 1 In one embodiment, the first heat exchange channel 310 and the second heat exchange channel 320 are disposed in the same housing and exchange heat with each other. It is understood that the first heat exchange device 300 has a first housing, and both the first heat exchange channel 310 and the second heat exchange channel 320 are disposed within the first housing. When a portion of the refrigerant exchanges heat through the first heat exchange channel 310 and another portion through the second heat exchange channel 320, if the temperatures of the first heat exchange channel 310 and the second heat exchange channel 320 after heat exchange are different and a temperature difference exists, then the first heat exchange channel 310 and the second heat exchange channel 320 within the first housing can exchange heat. The lower-temperature channel absorbs the heat from the higher-temperature channel, thus improving heat exchange efficiency and enhancing the energy efficiency of the heat exchange system 10.
[0059] In one embodiment, the third heat exchange channel 410 and the fourth heat exchange channel 420 are disposed in the same housing and exchange heat with each other. It is understood that the second heat exchange device 400 has a second housing, and both the third heat exchange channel 410 and the fourth heat exchange channel 420 are disposed within the second housing. When a portion of the refrigerant exchanges heat through the third heat exchange channel 410 and another portion through the fourth heat exchange channel 420, if there is a temperature difference between the third heat exchange channel 410 and the fourth heat exchange channel 420 after heat exchange, the third heat exchange channel 410 and the fourth heat exchange channel 420 within the second housing can exchange heat. The channel with the lower temperature absorbs the heat from the channel with the higher temperature, thus improving heat exchange efficiency and enhancing the energy efficiency of the heat exchange system 10.
[0060] In one embodiment, the second heat exchange device 400 has a second air duct. In the first working mode, the refrigerant in the third heat exchange channel 410 and the fourth heat exchange channel 420 is in a condensation and heat release state, and is located upstream of the other refrigerant in an evaporation and heat absorption state along the air outlet direction of the second air duct.
[0061] It is understood that the second heat exchange device 400 has a second housing, the second housing has a second air duct, air flows along the second air duct and can exchange heat with the third heat exchange channel 410 and the fourth heat exchange channel 420 in the second housing before being blown out from the second housing.
[0062] In the first operating mode, if a portion of the refrigerant discharged by the compressor 100 flows through the third heat exchange channel 410 in the first circulation loop and condenses and releases heat, and another portion of the refrigerant discharged by the compressor 100 flows through the fourth heat exchange channel 420 in the second circulation loop and evaporates and absorbs heat, then the third heat exchange channel 410 is located upstream of the fourth heat exchange channel 420 along the air outlet direction of the second air duct. The air first flows through the third heat exchange channel 410 in the second air duct, then flows through the fourth heat exchange channel 420, and is then blown outward. With this configuration, in the second heat exchange device 400, the refrigerant in the third heat exchange channel 410 can release heat for defrosting. After the air flows through the third heat exchange channel 410, it forms hot air, which can defrost the fourth heat exchange channel 420. That is, the fourth heat exchange channel 420 can absorb part of the heat released by the refrigerant in the third heat exchange channel 410 for defrosting, realizing the mutual utilization of the waste heat of the third heat exchange channel 410 and the waste cold of the fourth heat exchange channel 420, which is beneficial to improving the defrosting effect. Furthermore, for the first circulation loop, the condensing pressure of the third heat exchange channel 410 is reduced, which is beneficial to improving the system energy efficiency. For the second circulation loop, the heat absorption of the fourth heat exchange channel 420 increases the evaporation pressure, which is also beneficial to improving the system energy efficiency. Therefore, this scheme can improve the energy efficiency of the heat exchange system 10.
[0063] In the first working mode, if a portion of the refrigerant discharged by the compressor 100 flows through the third heat exchange channel 410 in the first circulation loop to evaporate and absorb heat, and another portion of the refrigerant discharged by the compressor 100 flows through the fourth heat exchange channel 420 in the second circulation loop to condense and release heat, then the fourth heat exchange channel 420 is located upstream of the third heat exchange channel 410 along the air outlet direction of the second air duct. The air first flows through the fourth heat exchange channel 420 in the second air duct, then flows through the third heat exchange channel 410, and is then blown outward. With this configuration, in the second heat exchange device 400, the refrigerant in the fourth heat exchange channel 420 can release heat for defrosting. After the air flows through the fourth heat exchange channel 420, it forms hot air, which can defrost the third heat exchange channel 410. That is, the third heat exchange channel 410 can absorb some of the heat released by the refrigerant in the fourth heat exchange channel 420 for defrosting, realizing the mutual utilization of the waste heat of the fourth heat exchange channel 420 and the waste cold of the third heat exchange channel 410, which is beneficial to improving the defrosting effect. Furthermore, for the second circulation loop, the condensing pressure of the fourth heat exchange channel 420 is reduced, which is beneficial to improving the system energy efficiency. For the first circulation loop, the heat absorption of the third heat exchange channel 410 increases the evaporation pressure, which is also beneficial to improving the system energy efficiency. Therefore, this scheme can improve the energy efficiency of the heat exchange system 10.
[0064] In one embodiment, in the first operating mode, the compressor 100 operates at a high frequency, with the frequency of the high-frequency operation being no less than 80Hz. This setting ensures that the compressor 100 operates at a high frequency during defrosting mode, enabling it to output high-temperature, high-pressure refrigerant. Even if one of the first and second circulation loops is engaged in heating defrosting, the other can still engage in heating circulation, ensuring sufficient heating capacity indoors and thus not affecting the indoor temperature. This avoids the problem of large fluctuations in indoor temperature caused by a decrease in indoor temperature during the defrosting process.
[0065] In the first operating mode, the operating frequency of the compressor 100 can be 80Hz, 90Hz, 100Hz, 150Hz, or 200Hz, etc., and the specific frequency is not limited here.
[0066] Please see Figure 3In one embodiment, in the first operating mode, the switching device 200 controls a portion of the refrigerant discharged from the compressor 100 to flow through the first heat exchange channel 310, where it condenses and releases heat before flowing into the third heat exchange channel 410 to evaporate and absorb heat. Another portion of the refrigerant flows through the fourth heat exchange channel 420, where it condenses and releases heat before flowing into the second heat exchange channel 320 to evaporate and absorb heat. The third heat exchange channel 410 absorbs a portion of the heat released by the refrigerant in the fourth heat exchange channel 420. With this configuration, a portion of the refrigerant discharged from the compressor 100 releases heat when flowing through the first heat exchange channel 310 of the first heat exchange device 300, providing indoor heating. Another portion of the refrigerant discharged from the compressor 100 releases heat when flowing through the fourth heat exchange channel 420 of the second heat exchange device 400, providing outdoor defrosting. Furthermore, the third heat exchange channel 410 within the second heat exchange device 400 can also absorb some of the heat released from the fourth heat exchange channel 420 for defrosting. This allows for the mutual utilization of the waste heat from the fourth heat exchange channel 420 and the waste cold from the third heat exchange channel 410, thereby improving the defrosting effect and the energy efficiency of the heat exchange system 10.
[0067] Please see Figure 4 In another embodiment, in the first operating mode, the switching device 200 controls a portion of the refrigerant discharged from the compressor 100 to flow through the third heat exchange channel 410, where it condenses and releases heat before flowing into the first heat exchange channel 310 to evaporate and absorb heat. Another portion of the refrigerant flows through the second heat exchange channel 320, where it condenses and releases heat before flowing into the fourth heat exchange channel 420 to evaporate and absorb heat. The fourth heat exchange channel 420 absorbs a portion of the heat released by the refrigerant in the third heat exchange channel 410. With this configuration, a portion of the refrigerant discharged from the compressor 100 releases heat when flowing through the third heat exchange channel 410 of the second heat exchange device 400 for outdoor defrosting, while another portion of the refrigerant discharged from the compressor 100 releases heat when flowing through the second heat exchange channel 320 of the first heat exchange device 300 for indoor heating. Furthermore, the fourth heat exchange channel 420 within the second heat exchange device 400 can also absorb some of the heat released from the third heat exchange channel 410 for defrosting, thus enabling the mutual utilization of the waste heat from the third heat exchange channel 410 and the waste cold from the fourth heat exchange channel 420. This is beneficial for improving the defrosting effect and the energy efficiency of the heat exchange system 10.
[0068] Please see Figure 2 In one embodiment, the heat exchange system 10 has a rapid heating mode. In the rapid heating mode, the switching device 200 controls a portion of the refrigerant discharged by the compressor 100 to flow through the first heat exchange channel 310 to condense and release heat, and another portion of the refrigerant to flow through the second heat exchange channel 320 to condense and release heat, so that both the first circulation loop and the second circulation loop operate in a heating cycle.
[0069] Specifically, there is one compressor 100. A portion of the refrigerant discharged from the compressor 100 flows along the first circulation loop, first through the first heat exchange channel 310 to condense and release heat for indoor heating, and then flows through the third heat exchange channel 410 for heat exchange. The other portion of the refrigerant discharged from the compressor 100 flows along the second circulation loop, first through the second heat exchange channel 320 to condense and release heat for indoor heating, and then flows through the fourth heat exchange channel 420 for heat exchange, and finally returns to the compressor 100. Therefore, in this scheme, the heat exchange system 10, by setting up one compressor 100, ensures that in rapid heating mode, both the first heat exchange channel 310 and the second heat exchange channel 320 of the first heat exchange device 300 are used for indoor heating, enabling rapid indoor heating with high efficiency.
[0070] In one embodiment, the first heat exchange device 300 has a first air duct. In the rapid heating mode, the second heat exchange channel 320 is located downstream of the first heat exchange channel 310 along the air outlet direction of the first air duct. The pressure of the refrigerant flowing into the first heat exchange channel 310 is less than the pressure of the refrigerant flowing into the second heat exchange channel 320.
[0071] Understandably, in rapid heating mode, air flows through the first heat exchange channel 310 in the first air duct, then through the second heat exchange channel 320, and is blown out of the first heat exchange device 300. The refrigerant pressure flowing into the first heat exchange channel 310 is lower than the refrigerant pressure flowing into the second heat exchange channel 320. That is, the refrigerant flowing into the first heat exchange channel 310 is medium-pressure refrigerant, and the refrigerant flowing into the second heat exchange channel 320 is high-pressure refrigerant. This allows the refrigerant pressure in the first heat exchange device 300 to be set in a gradient in rapid heating mode. Moreover, the high-pressure refrigerant is more conducive to improving heating capacity than the medium-pressure refrigerant. When air flows through the first heat exchange channel 310 and the second heat exchange channel 320, the air first flows through the medium-pressure refrigerant in the first heat exchange device 300, and then through the high-pressure refrigerant. This is conducive to improving heating capacity. Furthermore, the high and low pressure setting of the refrigerant flowing into the two heat exchange channels of the first heat exchange device 300 is conducive to reducing the pressure ratio of the compressor 100, thereby improving the energy efficiency of the heat exchange system 10.
[0072] Please see Figure 1In one embodiment, the compressor 100 has a first exhaust port 110, a second exhaust port 120, and an intake port 130. The first exhaust port 110 and the intake port 130 are connected to the first circulation loop, and the second exhaust port 120 and the intake port 130 are connected to the second circulation loop. In the rapid heating mode, the exhaust pressure of the first exhaust port 110 is less than the exhaust pressure of the second exhaust port 120. In this configuration, during rapid heating mode, the first exhaust port 110 and the second exhaust port 120 of the compressor 100 discharge refrigerant at different pressures. The first exhaust port 110 discharges medium-pressure refrigerant, and the second exhaust port 120 discharges high-pressure refrigerant. This ensures that the pressure of the refrigerant flowing into the first heat exchange channel 310 is lower than the pressure of the refrigerant flowing into the second heat exchange channel 320 without the need for an additional pressure regulating device. This simplifies the structure of the heat exchange system 10 and ensures that the refrigerant flowing into the two heat exchange channels of the first heat exchange device 300 is set at high and low pressures, thereby reducing the pressure ratio of the compressor 100 and improving the energy efficiency of the heat exchange system 10.
[0073] In one embodiment, the heat exchange system 10 further comprises:
[0074] The first operating mode is entered after a preset time of operation in the rapid heating mode; and / or, the second operating mode is entered when the ambient temperature of the second heat exchange device 400 is detected to be lower than the target temperature.
[0075] Understandably, when the heat exchange system 10 operates in the rapid heating mode for the preset time, it ensures that the room has sufficient heat output before proceeding to the first working mode. This further reduces the impact of defrosting on the indoor temperature, resulting in a good, imperceptible defrosting effect for the heat exchange system 10.
[0076] Furthermore, when the ambient temperature of the second heat exchange device 400 is detected to be lower than the target temperature, it indicates that the ambient temperature of the second heat exchange device 400 is low. Taking winter as an example, the second heat exchange device 400 is the outdoor unit and the first heat exchange device 300 is the indoor unit. When the outdoor temperature is below zero, the outdoor unit is prone to frost. The heat exchange system 10 is run in the first working mode to defrost, so as to ensure that the outdoor unit will not affect the indoor heating. This ensures that when the outdoor temperature is low in winter, the indoor unit can provide continuous and stable heating, and the indoor heating temperature is stable and comfortable.
[0077] In one embodiment, the first heat exchange device 300 includes a first heat exchange tube and a second heat exchange tube, the first heat exchange tube having a first heat exchange channel 310 and the second heat exchange tube having a second heat exchange channel 320; the first heat exchange tube and the second heat exchange tube are independent of each other and are spaced apart.
[0078] It is understood that the first heat exchange device 300 also includes first heat exchange plates. When the first heat exchange tube and the second heat exchange tube are independently and spaced apart, both the first heat exchange tube and the second heat exchange tube are provided with first heat exchange plates to form a first heat exchanger and a second heat exchanger. The first heat exchanger and the second heat exchanger can be disposed in the same housing, or they can be disposed in different housings. In this embodiment, the first heat exchanger and the second heat exchanger are disposed in the same housing, and they can exchange heat with each other, which is beneficial to improving the heat exchange efficiency of the first heat exchange device 300.
[0079] In one embodiment, the first heat exchange device 300 includes a first heat exchange tube and a second heat exchange tube. The first heat exchange tube has a first heat exchange channel 310, and the second heat exchange tube has a second heat exchange channel 320. At least one of the first heat exchange tube and the second heat exchange tube is disposed within the other, and a first flow gap for refrigerant to pass through is provided between the first heat exchange tube and the second heat exchange tube. With this configuration, taking the example of the first heat exchange tube being at least partially disposed within the second heat exchange tube, the refrigerant in the second heat exchange tube can better exchange heat with the refrigerant in the first heat exchange tube, thereby improving the heat exchange efficiency of the refrigerant flowing through the first heat exchange device 300.
[0080] In one embodiment, the first flow gap is an annular structure. This arrangement helps to increase the heat exchange area of the refrigerant flowing through the first and second heat exchange tubes, thereby further improving the heat exchange efficiency of the refrigerant.
[0081] In one embodiment, both the first heat exchange tube and the second heat exchange tube are coil structures. This arrangement helps to increase the heat exchange area of the first heat exchange channel 310 and the second heat exchange channel 320, prolong the heat exchange time of the refrigerant, and thus improve the heat exchange effect.
[0082] In one embodiment, the second heat exchange device 400 includes a third heat exchange tube and a fourth heat exchange tube, the third heat exchange tube having the third heat exchange channel 410 and the fourth heat exchange tube having the fourth heat exchange channel 420; the third heat exchange tube and the fourth heat exchange tube are independent of each other and are spaced apart.
[0083] It is understood that the second heat exchange device 400 also includes second heat exchange plates. When the third and fourth heat exchange tubes are independently arranged and spaced apart, both the third and fourth heat exchange tubes are provided with second heat exchange plates to form a third heat exchanger and a fourth heat exchanger. The third and fourth heat exchangers can be housed in the same housing, or they can be housed in different housings. In this embodiment, the third and fourth heat exchangers are housed in the same housing, allowing them to exchange heat with each other, which is beneficial for improving the heat exchange efficiency of the second heat exchange device 400.
[0084] In one embodiment, the second heat exchange device 400 includes a third heat exchange tube and a fourth heat exchange tube. The third heat exchange tube has a third heat exchange channel 410, and the fourth heat exchange tube has a fourth heat exchange channel 420. At least one of the third and fourth heat exchange tubes is disposed within the other, and a second flow gap for refrigerant to pass through is provided between the third and fourth heat exchange tubes. With this configuration, taking the third heat exchange tube being at least partially disposed within the fourth heat exchange tube as an example, the refrigerant in the third heat exchange tube can better exchange heat with the refrigerant in the fourth heat exchange tube, thereby improving the heat exchange efficiency of the refrigerant flowing through the second heat exchange device 400.
[0085] In one embodiment, the second flow gap is an annular structure. This arrangement helps to increase the heat exchange area of the refrigerant flowing through the third and fourth heat exchange tubes, thereby further improving the heat exchange efficiency of the refrigerant.
[0086] In one embodiment, both the third and fourth heat exchange tubes are coil structures. This arrangement helps to increase the heat exchange area of the third heat exchange channel 410 and the fourth heat exchange channel 420, prolong the heat exchange time of the refrigerant, and thus improve the heat exchange effect.
[0087] Please see Figure 1 In one embodiment, the compressor 100 has a first exhaust port 110, a second exhaust port 120 and an intake port 130, wherein the first exhaust port 110 and the intake port 130 are connected to the first circulation loop, and the second exhaust port 120 and the intake port 130 are connected to the second circulation loop.
[0088] It is understood that there is only one compressor 100. The discharge pressure of the first discharge port 110 and the second discharge port 120 of the compressor 100 can be the same or different, and the specifics are not limited here. The first discharge port 110 is independently connected to the first circulation loop, and the second discharge port 120 is independently connected to the second circulation loop, so that the first circulation loop and the second circulation loop can simultaneously achieve two identical or different condensing temperatures and two identical or different evaporating temperatures. Thus, the heat exchange system 10 can have multiple modes through a single compressor 100, such as: the first working mode, the rapid heating mode, and the rapid cooling mode. The heat exchange system 10 of this solution has high energy efficiency.
[0089] In one embodiment, the first heat exchange device 300 includes an indoor heat exchanger, and the second heat exchange device 400 includes an outdoor heat exchanger; that is, the heat exchange system 10 is applied in an air conditioner. In the first operating mode, if the first circulation loop operates in a heating cycle, the second circulation loop operates in a cooling cycle. The refrigerant in the first circulation loop is used for indoor heating, and the refrigerant in the second circulation loop is used for outdoor defrosting. To ensure that the indoor temperature is not affected during defrosting, the discharge pressure of the second exhaust port 120 is lower than the discharge pressure of the first exhaust port 110. That is, the second exhaust port 120 of the compressor 100 discharges medium-pressure refrigerant, which is used for outdoor defrosting, while the first exhaust port 110 of the compressor 100 discharges high-pressure refrigerant, which is used for indoor heating. This ensures that the indoor temperature is not affected, thus avoiding the problem of large fluctuations in indoor temperature caused by a decrease in indoor temperature during the defrosting process. Of course, in other embodiments, high-pressure refrigerant can also be used for defrosting; the specific method is not limited here.
[0090] In the first operating mode, if the first circulation loop operates in a cooling cycle, the second circulation loop operates in a heating cycle. The refrigerant in the first circulation loop is used for outdoor defrosting, and the refrigerant in the second circulation loop is used for indoor heating. The refrigerant discharged from the first exhaust port 110 flows along the first circulation loop, and the refrigerant discharged from the second exhaust port 120 flows along the second circulation loop.
[0091] In one embodiment, the compressor 100 is a dual-cylinder, dual-suction, dual-exhaust compressor, and the intake port 130 includes a first sub-intake port 131 and a second sub-intake port 132. The first sub-intake port 131 is connected to the first circulation loop, and the second sub-intake port 132 is connected to the second circulation loop.
[0092] Understandably, in a dual-cylinder, dual-suction, dual-exhaust compressor, the first sub-intake port 131 and the second sub-intake port 132 independently return air, and the first exhaust port 110 and the second exhaust port 120 independently exhaust air. By utilizing the simultaneous operation of the two compression cylinders, the intake and exhaust volumes of the compressor 100 are increased, thereby improving the compression capacity of the compressor 100 and thus enhancing the energy efficiency of the heat exchange system 10. The intake pressures of the first sub-intake port 131 and the second sub-intake port 132 can be the same or different, and are not specifically limited here. The first sub-intake port 131 is independently connected to the first circulation loop, and the second sub-intake port 132 is also independently connected to the second circulation loop, so that the first and second circulation loops are two independent circulation loops. The heat exchange system 10 can achieve two independent heating or cooling cycles, and the two circulation loops do not affect each other, thus ensuring the stability of the heat exchange system 10.
[0093] Please see Figure 1In one embodiment, the switching device 200 includes a first reversing valve 210 and a second reversing valve 220. The first reversing valve 210 is connected to the first circulation loop to change the refrigerant flow direction in the first circulation loop; the second reversing valve 220 is connected to the second circulation loop to change the refrigerant flow direction in the second circulation loop.
[0094] It is understood that the first reversing valve 210 and the second reversing valve 220 can be composed of multiple valve bodies or a four-way reversing valve; the specifics are not limited here. In this solution, the first reversing valve 210 includes a four-way reversing valve; and / or, the second reversing valve 220 includes a four-way reversing valve. The four-way reversing valves enable simple and effective switching of the refrigerant flow direction, simplifying the structure of the heat exchange system 10 and making it easy to assemble. This solution uses the first reversing valve 210 to change the refrigerant flow direction in the first circulation loop and the second reversing valve 220 to change the refrigerant flow direction in the second circulation loop, enabling the heat exchange system 10 to operate in multiple modes and increasing its applicability.
[0095] Please see Figure 1 In one embodiment, the switching device 200 includes a first throttling element 230 and a second throttling element 240. The first throttling element 230 is disposed in the first circulation loop and located between the first heat exchange channel 310 and the third heat exchange channel 410. The second throttling element 240 is disposed in the second circulation loop and located between the second heat exchange channel 320 and the fourth heat exchange channel 420. It is understood that by setting the first throttling element 230, the refrigerant in the first circulation loop is throttled; by setting the second throttling element 240, the refrigerant in the second circulation loop is throttled. The first throttling element 230 and / or the second throttling element 240 is an electronic expansion valve.
[0096] The heat exchange system 10 has multiple operating modes. For ease of understanding, the following explanation will use the first heat exchange device 300 as the indoor unit and the second heat exchange device 400 as the outdoor unit. Figure 2 to Figure 5 The arrows in the diagram indicate the direction of refrigerant flow, as shown below:
[0097] Please see Figure 2In the rapid heating mode, the first circulation loop operates a heating cycle. The refrigerant discharged from the first exhaust port 110 of the compressor 100, under the switching of the first reversing valve 210, flows through the first heat exchange channel 310, condenses and releases heat for indoor heating, then flows through the first throttling element 230 and through the third heat exchange channel 410 for evaporation and heat absorption, finally returning to the first sub-suction port 131 of the compressor 100 after passing through the first reversing valve 210, thus completing the heating cycle. The second circulation loop operates a heating cycle. The refrigerant discharged from the second exhaust port 120 of the compressor 100, under the switching of the second reversing valve 220, flows through the second heat exchange channel 320, condenses and releases heat for indoor heating, then flows through the second throttling element 240 and through the fourth heat exchange channel 420 for evaporation and heat absorption, finally returning to the second sub-suction port 132 of the compressor 100 after passing through the second reversing valve 220, thus completing the heating cycle.
[0098] Therefore, it can be seen that the heat exchange system 10 in this solution, by setting up a compressor 100, in the rapid heating mode, both the first heat exchange channel 310 and the second heat exchange channel 320 of the first heat exchange device 300 are used to heat the room, so that the room can be heated quickly, the indoor heating efficiency is high, and the compressor 100 has high energy efficiency.
[0099] Please see Figure 3 In one embodiment, in the first operating mode, the first circulation loop operates a heating cycle. The refrigerant discharged from the first exhaust port 110 of the compressor 100, under the switching of the first reversing valve 210, flows through the first heat exchange channel 310, condenses and releases heat for indoor heating, then flows through the first throttling element 230 and through the third heat exchange channel 410 for evaporation and heat absorption, finally returning to the first sub-suction port 131 of the compressor 100 after passing through the first reversing valve 210, thus completing the heating cycle. The second circulation loop operates a cooling cycle. The refrigerant discharged from the second exhaust port 120 of the compressor 100, under the switching of the second reversing valve 220, flows through the fourth heat exchange channel 420, condenses and releases heat for outdoor defrosting, then flows through the second throttling element 240 and through the second heat exchange channel 320 for evaporation and heat absorption, finally returning to the second sub-suction port 132 of the compressor 100 after passing through the second reversing valve 220, thus completing the cooling cycle.
[0100] Therefore, it can be seen that the heat exchange system 10 in this solution, by setting up a compressor 100, in the first working mode, uses part of the refrigerant discharged by the compressor 100 for indoor heating and the other part for outdoor defrosting, thereby avoiding the problem of large indoor temperature fluctuations caused by the decrease in indoor temperature during the defrosting process. The compressor 100 has high energy efficiency.
[0101] Please see Figure 4In another embodiment, in the first operating mode, the first circulation loop operates a refrigeration cycle. The refrigerant discharged from the first exhaust port 110 of the compressor 100, under the switching of the first reversing valve 210, flows through the third heat exchange channel 410, condenses and releases heat for outdoor defrosting, then flows through the first throttling element 230 and through the first heat exchange channel 310 for evaporation and heat absorption, finally returning to the first sub-suction port 131 of the compressor 100 after passing through the first reversing valve 210, thus completing the refrigeration cycle. The second circulation loop operates a heating cycle. The refrigerant discharged from the second exhaust port 120 of the compressor 100, under the switching of the second reversing valve 220, flows through the second heat exchange channel 320, condenses and releases heat for indoor heating, then flows through the second throttling element 240 and through the fourth heat exchange channel 420 for evaporation and heat absorption, finally returning to the second sub-suction port 132 of the compressor 100 after passing through the second reversing valve 220, thus completing the heating cycle.
[0102] Therefore, it can be seen that the heat exchange system 10 in this solution, by setting up a compressor 100, in the first working mode, a part of the refrigerant discharged by the compressor 100 is used for outdoor defrosting, and the other part of the refrigerant is used for indoor heating, thereby avoiding the problem of large indoor temperature fluctuations caused by the decrease in indoor temperature during the defrosting process. The compressor 100 has high energy efficiency.
[0103] Please see Figure 5 In rapid cooling mode, the first circulation loop operates a refrigeration cycle. The refrigerant discharged from the first exhaust port 110 of the compressor 100, under the switching of the first reversing valve 210, flows through the third heat exchange channel 410, condenses and releases heat, then passes through the first throttling element 230 and flows through the first heat exchange channel 310 to evaporate and absorb heat, thus cooling the room. Finally, it flows back to the first sub-suction port 131 of the compressor 100 after passing through the first reversing valve 210, thereby completing the refrigeration cycle. The second circulation loop operates a refrigeration cycle. The refrigerant discharged from the second exhaust port 120 of the compressor 100, under the switching of the second reversing valve 220, flows through the fourth heat exchange channel 420, condenses and releases heat, then passes through the second throttling element 240 and flows through the second heat exchange channel 320 to evaporate and absorb heat, thus cooling the room. Finally, it flows back to the second sub-suction port 132 of the compressor 100 after passing through the second reversing valve 220, thus completing the refrigeration cycle.
[0104] Therefore, it can be seen that the heat exchange system 10 in this scheme, by setting up a compressor 100, in the rapid cooling mode, both the first heat exchange channel 310 and the second heat exchange channel 320 of the first heat exchange device 300 are used to cool the room, so that the room can be cooled quickly, the indoor cooling efficiency is high, and the compressor 100 has high energy efficiency.
[0105] The present invention also proposes a heat exchange device, which includes the heat exchange system 10 as described above. The specific structure of the heat exchange system 10 is as described in the above embodiments. Since this heat exchange device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. The specific product type of the heat exchange device is not limited, as long as the heat exchange device can be used with the heat exchange system 10.
[0106] In one embodiment, the heat exchange device is an air conditioner or a refrigerator. When the heat exchange device is an air conditioner, a portion of the refrigerant discharged by the compressor 100 is used for indoor heating, and the other portion is used for outdoor defrosting, thereby avoiding the problem of large indoor temperature fluctuations caused by the indoor temperature dropping during the defrosting process of the air conditioner. When the heat exchange device is a refrigerator, a portion of the refrigerant discharged by the compressor 100 is used for cooling, and the other portion is used for defrosting, thereby avoiding the problem of large temperature fluctuations in the freezer / refrigerator compartments during the defrosting process of the refrigerator, which would affect food preservation.
[0107] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.
Claims
1. A heat exchange system, characterized in that, The heat exchange system includes a compressor, a switching device, a first heat exchange device, and a second heat exchange device; The first heat exchange device has a first heat exchange channel and a second heat exchange channel; The second heat exchange device has a third heat exchange channel and a fourth heat exchange channel; The compressor is connected to the first heat exchange channel and the third heat exchange channel via the switching device to form a first circulation loop; the compressor is connected to the second heat exchange channel and the fourth heat exchange channel via the switching device to form a second circulation loop; The heat exchange system has at least a first operating mode. In the first operating mode, one of the first circulation loop and the second circulation loop operates a heating cycle, and the other operates a cooling cycle. The refrigerant flows through one of the third heat exchange channel and the fourth heat exchange channel, where it condenses and releases heat, and the other evaporates and absorbs heat.
2. The heat exchange system as described in claim 1, characterized in that, The first heat exchange channel and the second heat exchange channel are located in the same housing and are configured to exchange heat with each other. And / or, the third heat exchange channel and the fourth heat exchange channel are located in the same housing and are configured to exchange heat with each other.
3. The heat exchange system as described in claim 1, characterized in that, The second heat exchange device has a second air duct. In the first working mode, the refrigerant in the third heat exchange channel and the fourth heat exchange channel is in a condensation and heat release state, and is located upstream of the other refrigerant in an evaporation and heat absorption state along the air outlet direction of the second air duct. And / or, in the first operating mode, the compressor operates at a high frequency, the frequency of which is not less than 80Hz.
4. The heat exchange system as described in claim 1, characterized in that, In the first working mode, the switching device controls a portion of the refrigerant discharged from the compressor to flow through the first heat exchange channel, where it condenses and releases heat, and then flows into the third heat exchange channel to evaporate and absorb heat. Another portion of the refrigerant flows through the fourth heat exchange channel, where it condenses and releases heat, and then flows into the second heat exchange channel to evaporate and absorb heat. The third heat exchange channel absorbs a portion of the heat released by the refrigerant in the fourth heat exchange channel. Alternatively, in the first operating mode, the switching device controls a portion of the refrigerant discharged from the compressor to flow through the third heat exchange channel, where it condenses and releases heat before flowing into the first heat exchange channel to evaporate and absorb heat. Another portion of the refrigerant flows through the second heat exchange channel, where it condenses and releases heat before flowing into the fourth heat exchange channel to evaporate and absorb heat. The fourth heat exchange channel absorbs a portion of the heat released by the refrigerant in the third heat exchange channel.
5. The heat exchange system as described in claim 1, characterized in that, The heat exchange system has a rapid heating mode. In the rapid heating mode, the switching device controls a portion of the refrigerant discharged from the compressor to flow through the first heat exchange channel and condense and release heat, while another portion of the refrigerant flows through the second heat exchange channel and condenses and releases heat, so that both the first circulation loop and the second circulation loop operate in a heating cycle.
6. The heat exchange system as described in claim 5, characterized in that, The first heat exchange device has a first air duct. In the rapid heating mode, the second heat exchange channel is located downstream of the first heat exchange channel along the air outlet direction of the first air duct, and the refrigerant pressure flowing into the first heat exchange channel is less than the refrigerant pressure flowing into the second heat exchange channel.
7. The heat exchange system as described in claim 6, characterized in that, The compressor has a first exhaust port, a second exhaust port, and an intake port. The first exhaust port and the intake port are connected to the first circulation loop, and the second exhaust port and the intake port are connected to the second circulation loop. In the rapid heating mode, the exhaust pressure of the first exhaust port is less than the exhaust pressure of the second exhaust port.
8. The heat exchange system as described in claim 5, characterized in that, The heat exchange system also has: In the first operating mode, after a preset time has elapsed in the rapid heating mode, the system enters the first working mode; and / or, The second operating mode is activated when the ambient temperature of the second heat exchanger is detected to be lower than the target temperature, and then the first operating mode is entered.
9. The heat exchange system as described in claim 1, characterized in that, The first heat exchange device includes a first heat exchange tube and a second heat exchange tube. The first heat exchange tube has a first heat exchange channel, and the second heat exchange tube has a second heat exchange channel. The first heat exchange tube and the second heat exchange tube are independent of each other and are arranged at intervals. Alternatively, one of the first heat exchange tube and the second heat exchange tube may be at least partially disposed in the other, and a first flow gap for the refrigerant to pass through is provided between the first heat exchange tube and the second heat exchange tube.
10. The heat exchange system as described in claim 1, characterized in that, The second heat exchange device includes a third heat exchange tube and a fourth heat exchange tube. The third heat exchange tube has a third heat exchange channel, and the fourth heat exchange tube has a fourth heat exchange channel. The third heat exchange tube and the fourth heat exchange tube are independent of each other and are arranged at intervals. Alternatively, one of the third heat exchange tube and the fourth heat exchange tube may be at least partially disposed in the other, and a second flow gap for the refrigerant to pass through is provided between the third heat exchange tube and the fourth heat exchange tube.
11. The heat exchange system according to any one of claims 1 to 10, characterized in that, The compressor has a first exhaust port, a second exhaust port, and an intake port. The first exhaust port and the intake port are connected to the first circulation loop, and the second exhaust port and the intake port are connected to the second circulation loop.
12. The heat exchange system as described in claim 11, characterized in that, The compressor is a dual-cylinder, dual-suction, dual-exhaust compressor. The intake port includes a first sub-intake port and a second sub-intake port. The first sub-intake port is connected to the first circulation loop, and the second sub-intake port is connected to the second circulation loop.
13. The heat exchange system as described in claim 11, characterized in that, The switching device includes a first reversing valve and a second reversing valve. The first reversing valve is connected to the first circulation loop to change the refrigerant flow direction in the first circulation loop; the second reversing valve is connected to the second circulation loop to change the refrigerant flow direction in the second circulation loop.
14. The heat exchange system as described in claim 11, characterized in that, The switching device includes a first throttling element and a second throttling element. The first throttling element is disposed in the first circulation loop and located between the first heat exchange channel and the third heat exchange channel. The second throttling element is disposed in the second circulation loop and located between the second heat exchange channel and the fourth heat exchange channel.
15. A heat exchange device, characterized in that, Includes the heat exchange system as described in any one of claims 1 to 14.
16. The heat exchange device as described in claim 15, characterized in that, The heat exchange device is an air conditioner or a refrigerator.