Quick-cooling and quick-heating compound system

Abstract

The invention discloses a quick-cooling and quick-heating compound system which comprises a refrigerant circulation loop, an economizer, a thermo-acoustic conversion device, a second indoor heat exchanger, a circulation device and a control device, and a first pipeline of the economizer is connected with an outdoor heat exchanger and the indoor heat exchanger; the thermo-acoustic conversion device comprises a thermo-acoustic engine and a thermo-acoustic refrigerator which are connected through a resonance tube; the second indoor heat exchanger and the second pipeline are connected to the thermo-acoustic conversion device through the switching device; the control device is configured to control the switch device and the thermo-acoustic conversion device so that the refrigerating and heating states of the second indoor heat exchanger and the indoor heat exchanger can be the same, and the second pipeline cools the first pipeline. The indoor heat exchanger provides energy through the compressor, the second indoor heat exchanger provides energy through the thermo-acoustic conversion device, the purpose of quick cooling and quick heating is achieved, the thermo-acoustic conversion device absorbs heat of an outlet in the side of the condenser of the refrigerant circulation loop, the degree of supercooling is improved, energy is saved, consumption is reduced, and the energy efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of temperature control equipment technology, specifically, it relates to a rapid cooling and heating composite system. Background Technology

[0002] Existing temperature control equipment is generally an air conditioning system. When cooling, if the outdoor unit's subcooling is low, the refrigerant cannot fully exert its function. This requires increasing the compressor frequency to maximize the indoor unit's capacity, resulting in energy waste and low energy efficiency. When heating, if the outdoor unit's subcooling is low, the outdoor unit's condenser absorbs less heat through evaporation, leading to less heat release in the indoor unit, poor heating effect, and easy frost formation. This triggers the indoor unit's anti-cold air control, affecting the user experience.

[0003] In addition, when the cooling or heating mode is turned on, due to the large indoor space, the outdoor compressor needs to slowly increase from low frequency to high frequency before the indoor temperature can be lowered or raised. This results in low heat exchange efficiency and a long time required, making it impossible to achieve rapid cooling or heating, which affects the user experience.

[0004] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention

[0005] This invention proposes a rapid cooling and rapid heating composite system to solve the technical problems of slow temperature regulation speed, low heat exchange efficiency and low energy efficiency caused by relying solely on compressor frequency increase in existing air conditioning systems.

[0006] To achieve the above-mentioned invention / design objectives, the present invention adopts the following technical solution: A rapid cooling and rapid heating composite system, comprising: The refrigerant circulation loop includes a compressor, a four-way valve, an outdoor heat exchanger, a throttling device, and an indoor heat exchanger connected in sequence. The system also includes: An economizer includes a first pipe and a second pipe, wherein the first pipe is connected between the outdoor heat exchanger and the indoor heat exchanger; A thermoacoustic conversion device includes a thermoacoustic engine and a thermoacoustic refrigerator connected by a resonant tube, wherein a phase adjustment mechanism is provided inside the resonant tube; The second indoor heat exchanger and the second pipeline are connected to the thermoacoustic conversion device via a switching device. A circulation device is used to realize the energy circulation between the second indoor heat exchanger, the second pipeline and the thermoacoustic conversion device; The control device is configured to control the switching device and the thermoacoustic conversion device so that the second indoor heat exchanger is in the same cooling and heating state as the indoor heat exchanger, and the second pipeline cools the first pipeline.

[0007] As described above, in the rapid cooling and heating composite system, the thermoacoustic engine includes a first room temperature heat exchanger, a first regenerator, and a hot end heat exchanger; the thermoacoustic refrigerator includes a cold end heat exchanger, a second regenerator, and a second room temperature heat exchanger; the cold end heat exchanger is connected to the first room temperature heat exchanger via a second resonant tube; the second room temperature heat exchanger is connected to the hot end heat exchanger via a first resonant tube; and a phase adjustment mechanism is provided inside the first and second resonant tubes. The first port of the second pipeline is connected to the cold end heat exchanger, and the second port of the second pipeline is connected to the first room temperature heat exchanger. The first port of the second indoor heat exchanger is connected to the cold end heat exchanger via a third switch. The second port of the second indoor heat exchanger is connected to the second port of the second pipeline, connected to the hot end heat exchanger, and connected to the cold end heat exchanger via a sixth switch. The first port of the second pipeline is connected to the first port of the second indoor heat exchanger via a second switch. The first room temperature heat exchanger and the hot end heat exchanger are connected via a pipeline, and the pipeline is equipped with an electric heating device.

[0008] In the rapid cooling and heating composite system described above, the control device is configured to control the second and sixth switches to be turned on and the third switch to be turned off when the indoor heat exchanger is in cooling mode; and to control the second and sixth switches to be turned off and the third switch to be turned on when the indoor heat exchanger is in heating mode.

[0009] In the rapid cooling and heating composite system described above, the indoor heat exchanger includes a convection heat exchanger and / or a radiant heat exchanger.

[0010] In the rapid cooling and heating composite system described above, the radiant heat exchanger is a shell-and-tube heat exchanger, which includes a water pipeline and a refrigerant pipeline. The first port of the refrigerant pipeline is connected between a four-way valve and the compressor suction port via a first switch, and is also connected between a four-way valve and the compressor discharge port via a switch. The second port of the refrigerant pipeline is connected to the first pipeline of the economizer via an electronic expansion valve.

[0011] In the rapid cooling and rapid heating composite system described above, the control device is configured to control the switch to be turned off and the first switch to be turned on when the indoor heat exchanger is in cooling mode, and to control the switch to be turned on and the first switch to be turned off when the indoor heat exchanger is in heating mode.

[0012] As described above, in the rapid cooling and heating combined system, the refrigerant circulation loop includes a second economizer, which includes a third pipe and a fourth pipe. The two ends of the third pipe are respectively connected to the first pipe and the indoor heat exchanger. One end of the fourth pipe is connected between the third pipe and the indoor heat exchanger through an electronic expansion valve, and the other end of the fourth pipe is connected to the compressor's return port.

[0013] The rapid cooling and heating composite system described above includes: The first temperature detection module is used to detect the refrigerant temperature between the first pipeline and the outdoor heat exchanger. High-pressure detection module, used to detect high-pressure; Outdoor ambient temperature detection module, used to detect outdoor ambient temperature Tao; The control module is configured to determine the corresponding saturation temperature CT based on the high pressure, acquire the refrigerant inlet temperature Tsci of the first pipeline and the outdoor ambient temperature Tao in cooling mode, determine the subcooling a = CT - Tsci, and determine the sound wave frequency and phase of the thermoacoustic conversion device based on the subcooling a and the outdoor ambient temperature Tao; and acquire the refrigerant outlet temperature Tsco of the first pipeline in heating mode, determine the subcooling a = CT - Tsco, and determine the sound wave frequency and phase of the thermoacoustic conversion device based on the subcooling a.

[0014] In the rapid cooling and heating composite system described above, the control module is configured to, in cooling mode, increase the frequency and phase of the sound wave when Tao is lower than the first outdoor set temperature and a is lower than the first subcooling, and decrease the frequency and phase of the sound wave when Tao is lower than the first outdoor set temperature and a is higher than the first subcooling; increase the frequency and phase of the sound wave when Tao is higher than the second outdoor set temperature and a is lower than the second subcooling, and decrease the frequency and phase of the sound wave when Tao is higher than the second outdoor set temperature and a is higher than the second subcooling; when Tao is between the first outdoor set temperature and the second outdoor set temperature, control is performed according to a=x, where x is determined by the slope determined by Tao, the first outdoor set temperature, the second outdoor set temperature, the first subcooling, and the second subcooling, increasing the frequency and phase of the sound wave when a is lower than x, and decreasing the frequency and phase of the sound wave when a is higher than x; wherein the second outdoor set temperature is higher than the first outdoor set temperature, and the second subcooling is higher than the first subcooling. The control module is configured to, in heating mode, increase the frequency and phase of the sound wave when a is lower than the first subcooling degree, and decrease the frequency and phase of the sound wave when a is higher than the first subcooling degree.

[0015] As described above, in the rapid cooling and heating composite system, an electric heating device is provided between the first room temperature heat exchanger and the hot end heat exchanger of the thermoacoustic conversion device, and the system includes a second temperature detection module for detecting the temperature at the first port of the second pipeline and a third temperature detection module for detecting the temperature at the second port. The control module is configured to, in cooling mode, acquire the temperature at the first port and the second port of the second pipeline, and turn on the electric heating device when the temperature difference between the second port and the first port is lower than a set difference, and turn off the electric heating device when the temperature difference is higher than the set difference.

[0016] Compared with the prior art, the advantages and positive effects of the present invention are as follows: The rapid cooling and heating composite system of the present invention includes a refrigerant circulation loop, an economizer, a thermoacoustic conversion device, a second indoor heat exchanger, a circulation device, and a control device. The refrigerant circulation loop includes a compressor, a four-way valve, an outdoor heat exchanger, a throttling device, and an indoor heat exchanger connected in sequence. The economizer includes a first pipeline and a second pipeline, with the two ends of the first pipeline connected to the outdoor heat exchanger and the indoor heat exchanger, respectively. The thermoacoustic conversion device includes a thermoacoustic motor and a thermoacoustic refrigerator connected through a resonant tube, and a phase adjustment mechanism is provided inside the resonant tube. The second indoor heat exchanger and the second pipeline are connected to the thermoacoustic conversion device through a switching device. The circulation device is used to realize the energy circulation between the second indoor heat exchanger, the second pipeline, and the thermoacoustic conversion device. The control device is configured to control the switching device and the thermoacoustic conversion device so that the second indoor heat exchanger and the indoor heat exchanger have the same cooling and heating state, and the second pipeline cools the first pipeline. The present invention provides energy to the indoor heat exchanger through a compressor and to the second indoor heat exchanger through a thermoacoustic conversion device, which greatly improves the efficiency of the heat exchanger and achieves rapid cooling and heating. The thermoacoustic conversion device absorbs heat from the condenser outlet of the refrigerant circulation loop, which greatly increases the subcooling in the cooling / heating mode and further reduces the temperature of the refrigerant entering the evaporator side, greatly improving the subcooling and the refrigerant's work capacity, maximizing the refrigerant's function. The target set temperature can be quickly reached without a high compressor frequency, saving energy, reducing consumption, improving energy efficiency, and further enhancing the user experience.

[0017] Other features and advantages of the present invention will become clearer after reading the detailed embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the cooling mode of the rapid cooling and heating composite system according to a specific embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram of the heating mode of the rapid cooling and heating composite system according to a specific embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of a thermoacoustic engine according to a specific embodiment of the present invention.

[0022] Figure 4 This is a schematic diagram of a thermoacoustic refrigeration machine according to a specific embodiment of the present invention.

[0023] In the picture: 11. Compressor; 12. Four-way valve; 13. Outdoor heat exchanger; 14. Throttling device; 151. Convection heat exchanger; 152. Radiant heat exchanger; 16. Switch; 17. Electronic expansion valve; 18. Indoor electronic expansion valve; 2. Economizer; 21. First pipeline; 22. Second pipeline; 3. Thermoacoustic conversion device; 31. Phase adjustment mechanism; 311. First resonant tube; 312. Second resonant tube; 32. Thermoacoustic engine; 321. First room temperature heat exchanger; 322. First regenerator; 323. Hot end heat exchanger; 33. Thermoacoustic refrigerator; 331. Cold end heat exchanger; 332. Second regenerator; 333. Second room temperature heat exchanger; 334. Electric heating device; 4. Second indoor heat exchanger; 5. Circulation device; SV1, First switch; SV2, Second switch; SV3, Third switch; SV4, Fourth switch; SV5, Fifth switch; SV6, Sixth switch; 7. Second economizer; 72. Third pipeline; 71. Fourth pipeline; 73. Second electronic expansion valve; 81. First temperature detection module; 82. High pressure detection module; 83. Second temperature detection module; 84. Third temperature detection module. Detailed Implementation

[0024] 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. In the description of embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0027] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0028] In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0029] The rapid cooling and heating composite system adds a thermoacoustic conversion device, an economizer, a second indoor heat exchanger, and a circulation device to an air conditioning or heat pump system. The thermoacoustic conversion device provides energy to the second indoor heat exchanger and the economizer, ensuring that the second indoor heat exchanger operates in the same cooling and heating mode as the first indoor heat exchanger, thus increasing the rate of indoor temperature regulation. At the same time, the second pipeline cools the first pipeline, significantly increasing the subcooling at the condenser outlet, further reducing the temperature entering the evaporator and enhancing the refrigerant's work capacity. This allows the target set temperature to be reached quickly without requiring a high compressor frequency, resulting in energy savings, improved energy efficiency, and a better user experience.

[0030] The following is combined with Figures 1-4 A detailed explanation of the rapid cooling and heating composite system: The rapid cooling and rapid heating combined system includes a refrigerant circulation loop, an economizer, a thermoacoustic conversion device, a second indoor heat exchanger, a circulation device, and a control device.

[0031] The first pipe of the economizer is located in the refrigerant circulation loop. The thermoacoustic conversion device, the second indoor heat exchanger, the circulation device, and the second pipe of the economizer form a thermoacoustic conversion system.

[0032] The refrigerant circulation loop includes a compressor 11, a four-way valve 12, an outdoor heat exchanger 13, a throttling device 14, and an indoor heat exchanger connected in sequence.

[0033] Indoor heat exchangers are used to regulate indoor temperature.

[0034] The indoor heat exchanger is a convection heat exchanger and / or a radiant heat exchanger.

[0035] In this embodiment, the indoor heat exchanger includes a convection heat exchanger 151 and a radiant heat exchanger 152.

[0036] The convection heat exchanger 151 is equipped with a fan, which generates air convection for heat exchange. The specific form of the device in which the convection heat exchanger 151 is located can be an indoor unit of an air conditioner.

[0037] The radiant heat exchanger 152 exchanges heat with the air through radiation. The specific form of the device in which the radiant heat exchanger 152 is located can be underfloor heating.

[0038] Economizer 2 includes a first pipe 21 and a second pipe 22. The first pipe 21 is connected between the outdoor heat exchanger 13 and the indoor heat exchanger. That is, the first pipe 21 is located on the refrigerant circulation loop. The refrigerant flowing out of the outdoor heat exchanger 13 enters the indoor heat exchanger through the first pipe 21, or the refrigerant flowing out of the indoor heat exchanger enters the outdoor heat exchanger 13 through the first pipe 21.

[0039] The thermoacoustic conversion device 3 includes a thermoacoustic engine 32 and a thermoacoustic refrigerator 33 connected by a resonant tube. A phase adjustment mechanism is provided inside the resonant tube to adjust the acoustic impedance between the thermoacoustic engine and the thermoacoustic refrigerator so that the thermoacoustic engine 32 and the thermoacoustic refrigerator 33 are acoustically impedance coupled.

[0040] The second indoor heat exchanger 4 is used to regulate the indoor temperature.

[0041] The second indoor heat exchanger 4 is a convection heat exchanger and / or a radiant heat exchanger.

[0042] In this embodiment, the second indoor heat exchanger 4 is a radiant heat exchanger.

[0043] Radiant heat exchangers exchange heat with the air through radiation. The specific form of the system in which a radiant heat exchanger is installed can be underfloor heating.

[0044] The second indoor heat exchanger 4 and the second pipeline 22 are connected to the thermoacoustic conversion device 3 via a switching device.

[0045] The circulation device 5 is used to realize the energy circulation between the second indoor heat exchanger 4, the second pipeline 22 and the thermoacoustic conversion device 3.

[0046] The control device is configured as a control switch device and a thermoacoustic conversion device 3, so that the second indoor heat exchanger 4 is in the same cooling and heating state as the indoor heat exchanger, and the second pipeline 22 cools down the first pipeline 21.

[0047] The thermoacoustic conversion device 3 utilizes the thermoacoustic effect for thermoacoustic conversion. The thermoacoustic effect is a physical phenomenon in which heat induces acoustic self-excited oscillations in an elastic medium (usually a high-pressure inert gas). When heat is applied to the hot-end heat exchanger, the gas surrounding it is heated. The gas expands and generates the first pressure disturbance wavefront, which propagates towards both ends at the speed of sound. Simultaneously, because the expanded gas is pushed into the gaps between the regenerator plates, and the temperature of the regenerator is lower than that of the hot-end heat exchanger, the gas volume contracts after heat exchange, and the contracting gas tends to move back. At the same time, the first pressure wavefront propagates to the end of the resonant cavity and is reflected back. The reflected wave is superimposed on the gas contraction motion. Positive feedback reinforcement is generated at a certain frequency (determined by the length of the resonant tube and the speed of sound). After several cycles of repeated reinforcement, saturation is reached, forming a continuous resonant oscillation. This process completes the conversion of heat into mechanical energy in the form of sound waves, and this process is called the "thermoacoustic positive effect."

[0048] In a resonant tube, an electroacoustic oscillation device is used to generate acoustic pressure waves. The "thermoacoustic inverse effect" results in a temperature difference between the two heat exchangers, which is the heat pumping process.

[0049] The thermoacoustic engine 32 includes a first room temperature heat exchanger 321, a first regenerator 322, and a hot end heat exchanger 323.

[0050] Figure 3 The left side represents the room temperature end of the first regenerator 322, and the right side represents the high temperature end. This means that a temperature gradient exists along the axial direction of the first regenerator 322, and the acoustic power propagates and amplifies from left to right. Within the first regenerator 322 of the thermoacoustic engine, each gas particle undergoes a complete thermoacoustic dynamic cycle, including compression, heat release, expansion, and heat absorption. 1) As the gas particles move towards the higher temperature side, they are compressed, increasing the pressure; 2) The temperature of the gas micro-particles is lower than that of the first regenerator 322, thus absorbing heat from the first regenerator 322. Both pressure and temperature reach their maximum, and the volume reaches its maximum compression. 3) As the gas particles move towards room temperature, their volume expands, doing work and reducing pressure. 4) The gas micro-particles release heat to the first regenerator 322, and the pressure and temperature reach their minimum, while the volume reaches its maximum expansion.

[0051] Numerous gas micro-clusters, through relay-like heat transfer and synergistic action, gradually convert the heat input to the hot-end heat exchanger 323 into acoustic work. Heat that cannot be converted is discharged to the ambient heat source through the first room-temperature heat exchanger 321. It should be noted that the thermoacoustic cycle involves two isothermal processes and two isobaric processes, while the Stirling cycle involves two isothermal processes and two isochoric processes. Therefore, the thermoacoustic effect is a thermodynamic cycle based on a completely new working principle, fundamentally different from the Stirling cycle.

[0052] The thermoacoustic refrigerator 33 includes a cold end heat exchanger 331, a second regenerator 332, and a second room temperature heat exchanger 333.

[0053] Sound waves are compression-expansion waves that can interact with solid media to produce endothermic and exothermic effects. Under certain conditions, sound waves can pump heat from temperatures below the ambient temperature to the environment, forming an acoustic cooling cycle (reverse cycle), also known as the acoustic cooling effect. Figure 4 The acoustic energy propagates and is consumed from left to right. Heat in the second regenerator 332 is pumped from the cold-end heat exchanger 331 to the second room-temperature heat exchanger 333, thus achieving cooling in the cold-end heat exchanger 331. Within the thermoacoustic refrigerator 33, each gas particle undergoes a complete acoustic refrigeration cycle, including compression, heat release, expansion, and heat absorption. 1) The gas particles move towards the second room temperature heat exchanger 333, causing the temperature to rise and the pressure to increase; 2) The temperature of the gas micro-particles is higher than the temperature of the second regenerator 332, thus releasing heat to the second regenerator 332; 3) The gas particles move towards the cold-end heat exchanger 331, resulting in a decrease in temperature and pressure; 4) The temperature of the gas micro-particles is lower than that of the second regenerator 332, and heat is absorbed from the second regenerator 332.

[0054] Through the consumption of acoustic energy, numerous gas microparticles gradually transfer heat from the low-temperature end to the high-temperature end of the second regenerator 332 through a relay-style heat transfer, thereby realizing the refrigeration function of the cold-end heat exchanger 331. Similarly, the gas microparticles in the regenerator of the refrigeration unit will undergo two isothermal processes and two isobaric processes, which is fundamentally different from the Stirling cycle.

[0055] 5) Heat-driven thermoacoustic refrigeration (the pressure wave generated by the positive effect provides power for the reverse effect, generating a temperature difference).

[0056] In summary, the gas inside the thermoacoustic engine 32 generates self-excited pressure oscillations, converting thermal energy into mechanical energy in the form of acoustic energy. Meanwhile, in the thermoacoustic refrigerator 33, acoustic work is consumed to transport heat from the low-temperature end of the first regenerator 322 to the high-temperature end. The heat-driven thermoacoustic refrigeration technology combines these two different thermoacoustic effects: utilizing the acoustic energy generated in the thermoacoustic engine 32 (thermoacoustic effect) to drive the thermoacoustic refrigerator 33 for refrigeration (acoustic cooling effect), thereby achieving energy conversion from thermal energy to acoustic energy to cold energy (thermoacoustic cooling).

[0057] The cold end heat exchanger 331 is connected to the first room temperature heat exchanger 321 through the second resonant tube 312, and the second room temperature heat exchanger 333 is connected to the hot end heat exchanger 323 through the first resonant tube 311. Both the first resonant tube 311 and the second resonant tube 312 are equipped with a phase adjustment mechanism 31.

[0058] like Figures 1-2 As shown, the thermoacoustic conversion device 3 includes a thermoacoustic engine 32, a thermoacoustic refrigerator 33, and a phase-adjusting mechanism 31. The thermoacoustic conversion device 3 is a self-excited oscillation system. The thermoacoustic refrigerator 33 not only consumes the acoustic power of the engine to generate a cooling effect but also provides the required volumetric flow rate and phase for the thermoacoustic engine 32. Therefore, acoustic impedance matching is required between the thermoacoustic engine 32 and the thermoacoustic refrigerator 33. Inappropriate acoustic impedance coupling will severely degrade cooling performance or even cause the system to malfunction.

[0059] Therefore, the phasing mechanism 31 is mainly used to adjust the acoustic impedance between the thermoacoustic engine 32 and the thermoacoustic refrigerator 33, so that both can work simultaneously under their respective suitable sound fields, thereby improving the overall cooling efficiency of the machine. Common phasing mechanisms 31 include acoustically capacitive cavities, acoustically sensitive solid pistons, slender pipes, and liquid pistons, etc.

[0060] The regenerator is the most crucial component of the thermoacoustic conversion device 3, and its function is thermoacoustic conversion.

[0061] Resonant tubes are used to maintain the required oscillation frequency of a system, regulate pressure fluctuations and volumetric flow rate phase relationships, and transmit / store acoustic energy.

[0062] The switching device includes a second switch SV2, a third switch SV3, and a sixth switch SV6.

[0063] The first port of the second pipe 22 is connected to the cold end heat exchanger 331, and the second port of the second pipe 22 is connected to the first room temperature heat exchanger 321.

[0064] The first port of the second indoor heat exchanger 4 is connected to the cold-end heat exchanger 331 via the third switch SV3. The second port of the second indoor heat exchanger 4 is connected to the second port of the second pipeline 22, which is connected to the hot-end heat exchanger 323, and then connected to the cold-end heat exchanger 331 via the sixth switch SV6. The first port of the second pipeline 22 is connected to the first port of the second indoor heat exchanger 4 via the second switch SV2. The first room temperature heat exchanger 321 and the hot-end heat exchanger 323 are connected by a pipeline, and an electric heating device 334 is installed in the pipeline. The electric heating device 334 is installed in the pipeline between the first room temperature heat exchanger 321 and the hot-end heat exchanger 323. With this arrangement, the heat generated by the electric heating device 334 is transferred to the hot-end heat exchanger 323, thereby establishing an initial temperature difference between the hot-end heat exchanger 323 and the first room temperature heat exchanger 321.

[0065] Driven by an initial temperature difference, the thermoacoustic engine 32 generates sound waves in its first regenerator 322 based on the thermoacoustic positive effect. These sound waves are transmitted to the thermoacoustic refrigerator 33, where the inverse thermoacoustic effect creates a cooling temperature difference across the second regenerator 332. The cold end of the second regenerator 332 absorbs heat, and the cold end heat exchanger cools, outputting a low-temperature heat exchange medium for continuous cooling. This thermoacoustic effect cooling eliminates the need for a compressor and refrigerant, unlike traditional heat pump air conditioners, thus reducing energy consumption and environmental pollution. Furthermore, the thermoacoustic effect air conditioner does not require heat exchange with the outdoors, making it unaffected by climate and capable of stable cooling even in extreme weather conditions.

[0066] The pipeline is connected to the first room temperature heat exchanger 321 and the hot end heat exchanger 323 to transfer the heat from the first room temperature heat exchanger 321 to the hot end heat exchanger 323, thereby maintaining the temperature difference between the two ends of the first regenerator 322.

[0067] During the operation of the thermoacoustic conversion device, the first room temperature heat exchanger 321 of the first regenerator 322 generates waste heat. The pipeline is connected to the first room temperature heat exchanger 321 and the hot end heat exchanger 323 in sequence. After the heat exchange medium exchanges heat with the first room temperature heat exchanger 321, the heat is transferred to the hot end heat exchanger 323 to maintain the temperature difference between the two ends of the first regenerator 322. In this way, the electric heating device 334 can operate at low power or even not continue to operate, which is beneficial to energy saving.

[0068] The cold-end heat exchanger 331 of the thermoacoustic refrigerator 33 absorbs heat for cooling, while the second room-temperature heat exchanger 333 releases heat. By setting up the second room-temperature heat exchanger 333, the waste heat released from the hot end of the cold-end heat exchanger 331 can be released more quickly, ensuring the normal operation of the second regenerator 332. At the same time, a heat exchange fan is set on one side of the second room-temperature heat exchanger 333, which can accelerate the air flow speed on the surface of the second room-temperature heat exchanger 333, further improving the heat exchange efficiency of the second room-temperature heat exchanger 333.

[0069] The control device is configured to turn on the second switch SV2 and the sixth switch SV6 and turn off the third switch SV3 when the indoor heat exchanger is in cooling mode; and to turn off the second switch SV2 and the sixth switch SV6 and turn on the third switch SV3 when the indoor heat exchanger is in heating mode.

[0070] The radiant heat exchanger 152 is a shell-and-tube heat exchanger, which includes a water pipe and a refrigerant pipe. The first port of the refrigerant pipe is connected between the four-way valve 12 and the suction port of the compressor 11 through the first switch SV1, and is connected between the four-way valve 12 and the discharge port of the compressor 11 through the switch 16. The second port of the refrigerant pipe is connected to the first pipe 21 of the economizer 2 through the electronic expansion valve 17.

[0071] The control device is configured such that when the indoor heat exchanger is in cooling mode, control switch 16 is turned off and first switch SV1 is turned on; when the indoor heat exchanger is in heating mode, control switch 16 is turned on and first switch SV1 is turned off.

[0072] The refrigerant circulation loop includes a second economizer 7, which includes a third pipe 72 and a fourth pipe 71. The two ends of the third pipe 72 are connected to the first pipe 21 and the indoor heat exchanger, respectively. One end of the fourth pipe 71 is connected between the third pipe 72 and the indoor heat exchanger through a second electronic expansion valve 73, and the other end of the fourth pipe 71 is connected to the return port of the compressor 11.

[0073] like Figure 1 As shown, when the rapid cooling and heating combined system is cooling, switch 16 is off, SV1 is on, SV2 is on, SV3 is off, and SV6 is on.

[0074] The refrigerant flow direction in the refrigerant circulation loop is as follows: compressor 11, four-way valve 12, outdoor heat exchanger 13, throttling device 14, first pipe 21 of economizer 2, second economizer 7, and then returns to compressor 11 through convection heat exchanger 151 and radiant heat exchanger 152 respectively. Both convection heat exchanger 151 and radiant heat exchanger 152 are evaporators, achieving refrigeration.

[0075] The water pipes of the radiant heat exchanger 152 are filled with cold water, which further improves the indoor cooling effect.

[0076] When the thermoacoustic conversion device 3 and the circulation device 5 are activated, the cold end heat exchanger 331 absorbs heat and flows out cold water. The cold water enters the second pipe 22 of the economizer 2, which cools the first pipe 21. After exchanging heat with the first pipe 21, the water passes through the sixth switch SV6 and enters the cold end heat exchanger 331 for heat exchange. It also passes through the first room temperature heat exchanger 321, the electric heating device 334, the hot end heat exchanger 323, and the sixth switch SV6 before entering the cold end heat exchanger 331 for heat exchange. The cold water also enters the second indoor heat exchanger 4 through the second switch SV2 and then enters the cold end heat exchanger 331 through the sixth switch SV6 for heat exchange, thus achieving cooling in the second indoor heat exchanger 4 and improving the indoor cooling effect.

[0077] The convection heat exchanger 151 blows cold air, the radiant heat exchanger 152 and the second indoor heat exchanger 4 carry cold water, and the three heat exchangers work in parallel to rapidly cool the room. The outdoor condenser outlet temperature is approximately 37 degrees Celsius. First, it passes through the economizer 2, where the refrigerant in the first pipe 21 exchanges heat with the cold water flowing out of the thermoacoustic refrigerator 33. The temperature of the cold water depends on the intensity, amplitude, and frequency of the thermoacoustic sound waves; this is the first cooling. Then, it passes through the second economizer 7 and exchanges heat with the low-temperature refrigerant after the second electronic expansion valve 73; this is the second cooling. After that, it enters the room and undergoes a third cooling process (the refrigerant temperature is approximately 9 degrees Celsius) through the indoor electronic expansion valves 18 and 17. Then, it enters the indoor heat exchanger, where it evaporates and absorbs heat, carrying away the heat from the room.

[0078] like Figure 2 As shown, when the rapid cooling and rapid heating combined system is in heating mode, switch 16 is on, SV1 is off, SV2 is off, SV3 is on, and SV6 is off.

[0079] The refrigerant flow direction in the refrigerant circulation loop is as follows: compressor 11, four-way valve 12, then through convection heat exchanger 151 and radiant heat exchanger 152 respectively, then converging to the second economizer 7, then through the first pipe 21 of economizer 2, throttling device 14, outdoor heat exchanger 13, and back to compressor 11. Both convection heat exchanger 151 and radiant heat exchanger 152 are condensers, realizing heating.

[0080] The water pipes of the radiant heat exchanger 152 carry hot water, further improving the indoor heating effect.

[0081] When the thermoacoustic conversion device 3 and the circulation device 5 are started, the cold end heat exchanger 331 absorbs heat and flows out cold water. The cold water enters the second pipe 22 of the economizer 2, and the second pipe 22 cools down the first pipe 21. Then, it passes through the first room temperature heat exchanger 321, the electric heating device 334, and the hot end heat exchanger 323 before entering the second indoor heat exchanger 4. The second indoor heat exchanger 4 releases heat and then passes through the third switch SV3 to enter the cold end heat exchanger 331 for heat exchange, thereby realizing the heating of the second indoor heat exchanger 4 and improving the indoor heating effect.

[0082] Due to the conservation of energy, the heat released at the room temperature end of the first regenerator 322 is roughly the same as the heat absorbed at the hot end. Therefore, the thermoacoustic engine 32 will not have a significant impact on the temperature of the water in the pipeline.

[0083] The convection heat exchanger 151 blows hot air, the radiant heat exchanger 152 and the second indoor heat exchanger 4 carry hot water, and the three zones work in parallel to rapidly raise the indoor temperature. The indoor heat exchanger acts as a condenser, with an outlet temperature of approximately 34 degrees Celsius. The refrigerant first passes through the second economizer 7, where it exchanges heat with the low-temperature refrigerant after the second electronic expansion valve 73, which is the first cooling step. Then, it passes through the economizer 2, where the refrigerant in the first pipeline 21 exchanges heat with the cold water in the thermoacoustic refrigerator 33, which is the second cooling step. After that, it is throttled and cooled by the throttling device 14 (the refrigerant temperature is approximately 2 degrees Celsius), and then evaporates and absorbs heat in the outdoor heat exchanger 13.

[0084] To improve the accuracy of the rapid cooling and heating composite system control, the system also includes a first temperature detection module 81, a high pressure detection module 82, and an outdoor ambient temperature detection module.

[0085] The first temperature detection module 81 is used to detect the refrigerant temperature between the first pipeline 21 and the outdoor heat exchanger 13.

[0086] The high-pressure detection module 82 is used to detect high-pressure. The high-pressure detection module 82 can be located at the exhaust port of the compressor 11 and is used to detect the pressure at the exhaust port of the compressor 11.

[0087] The outdoor ambient temperature detection module is used to detect the outdoor ambient temperature.

[0088] The control module is configured to determine the corresponding saturation temperature CT based on the high pressure.

[0089] In cooling mode, the refrigerant inlet temperature Tsci and the outdoor ambient temperature Tao of the first pipeline 21 are obtained, and the subcooling degree a = CT - Tsci is determined. Based on the subcooling degree a and the outdoor ambient temperature Tao, the sound wave frequency and phase of the thermoacoustic conversion device are determined.

[0090] Specifically, the control module is configured for cooling mode: When Tao is lower than the first outdoor set temperature and a is lower than the first subcooling, the frequency and phase of the sound wave are increased. When Tao is lower than the first outdoor set temperature and a is higher than the first subcooling, the frequency and phase of the sound wave are decreased so that a is within the first subcooling threshold range.

[0091] That is, when Tao is lower than the first outdoor set temperature, the sound wave frequency and phase are increased when a is lower than the first subcooling degree, and when a is higher than the first subcooling degree, the sound wave frequency and phase are decreased.

[0092] When Tao is higher than the second outdoor set temperature and a is lower than the second subcooling, the sound wave frequency and phase are increased. When Tao is higher than the second outdoor set temperature and a is higher than the second subcooling, the sound wave frequency and phase are decreased so that a is within the second subcooling threshold range.

[0093] That is, when Tao is higher than the second outdoor set temperature, the sound wave frequency and phase are increased when a = the second subcooling degree, and when a is lower than the second subcooling degree, the sound wave frequency and phase are decreased when a is higher than the second subcooling degree.

[0094] When Tao is between the first outdoor set temperature and the second outdoor set temperature, it is controlled according to a=x. x is determined by the slope determined by Tao, the first outdoor set temperature, the second outdoor set temperature, the first subcooling and the second subcooling. When a is lower than x, the sound wave frequency and phase are increased. When a is higher than x, the sound wave frequency and phase are decreased so that a is within the subcooling threshold range of x.

[0095] Among them, the second outdoor set temperature is higher than the first outdoor set temperature, and the second subcooling is higher than the first subcooling.

[0096] The control module is configured to acquire the refrigerant outlet temperature Tsco of the first pipeline 21 in heating mode, determine the subcooling a=CT-Tsco, and determine the sound wave frequency and phase of the thermoacoustic conversion device based on the subcooling a.

[0097] The control module is configured to, in heating mode, increase the frequency and phase of the sound wave when a is below the first subcooling degree, and decrease the frequency and phase of the sound wave when a is above the first subcooling degree, so that a is within the first subcooling degree threshold range.

[0098] An electric heating device 334 is provided between the first room temperature heat exchanger 321 and the hot end heat exchanger 323 of the thermoacoustic conversion device. The system includes a second temperature detection module 83 for detecting the temperature at the first port of the second pipeline 22 and a third temperature detection module 84 for detecting the temperature at the second port.

[0099] The control module is configured to, in cooling mode, acquire the temperature at the first port and the second port of the second pipe 22, and when the temperature difference between the second port and the first port is lower than a set difference, turn on the electric heating device 334 to improve the cooling effect of the cold end heat exchanger 331; and when the temperature difference between the second port and the first port is higher than the set difference, turn off the electric heating device 334.

[0100] Furthermore, the electric heating device 334 is turned off when the time exceeds the difference set time.

[0101] The electric heating device 334 is a constant power electric heating device.

[0102] The electric heating device 334 is a variable power electric heating device, and the power of the electric heating device 334 is negatively correlated with the temperature difference between the second port and the first port.

[0103] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by the present invention.

Claims

1. A rapid cooling and heating composite system, comprising: The refrigerant circulation loop includes a compressor, a four-way valve, an outdoor heat exchanger, a throttling device, and an indoor heat exchanger connected in sequence. The system is characterized in that it further includes: An economizer includes a first pipe and a second pipe, wherein the first pipe is connected between the outdoor heat exchanger and the indoor heat exchanger; A thermoacoustic conversion device includes a thermoacoustic engine and a thermoacoustic refrigerator connected by a resonant tube, wherein a phase adjustment mechanism is provided inside the resonant tube; The second indoor heat exchanger and the second pipeline are connected to the thermoacoustic conversion device via a switching device. A circulation device is used to realize the energy circulation between the second indoor heat exchanger, the second pipeline and the thermoacoustic conversion device; The control device is configured to control the switching device and the thermoacoustic conversion device so that the second indoor heat exchanger is in the same cooling and heating state as the indoor heat exchanger, and the second pipeline cools the first pipeline.

2. The rapid cooling and heating composite system according to claim 1, characterized in that, The thermoacoustic engine includes a first room temperature heat exchanger, a first regenerator, and a hot end heat exchanger. The thermoacoustic refrigerator includes a cold end heat exchanger, a second regenerator, and a second room temperature heat exchanger. The cold end heat exchanger is connected to the first room temperature heat exchanger through a second resonant tube. The second room temperature heat exchanger is connected to the hot end heat exchanger through a first resonant tube. A phase adjustment mechanism is provided inside the first resonant tube and the second resonant tube. The first port of the second pipeline is connected to the cold end heat exchanger, and the second port of the second pipeline is connected to the first room temperature heat exchanger. The first port of the second indoor heat exchanger is connected to the cold end heat exchanger via a third switch, and the second port of the second indoor heat exchanger is connected to the second port of the second pipeline, connected to the hot end heat exchanger, and connected to the cold end heat exchanger via a sixth switch. The first port of the second pipeline is connected to the first port of the second indoor heat exchanger via a second switch; the first room temperature heat exchanger and the hot end heat exchanger are connected via a pipeline, and the pipeline is equipped with an electric heating device.

3. The rapid cooling and heating composite system according to claim 2, characterized in that, The control device is configured to control the second and sixth switches to be turned on and the third switch to be turned off when the indoor heat exchanger is in cooling mode; and to control the second and sixth switches to be turned off and the third switch to be turned on when the indoor heat exchanger is in heating mode.

4. The rapid cooling and heating composite system according to claim 1, characterized in that, The indoor heat exchanger includes a convection heat exchanger and / or a radiant heat exchanger.

5. The rapid cooling and heating composite system according to claim 4, characterized in that, The radiant heat exchanger is a shell-and-tube heat exchanger, which includes a water pipeline and a refrigerant pipeline. The first port of the refrigerant pipeline is connected to the four-way valve and the compressor suction port through a first switch, and is also connected to the four-way valve and the compressor discharge port through a switch. The second port of the refrigerant pipeline is connected to the first pipeline of the economizer through an electronic expansion valve.

6. The rapid cooling and heating composite system according to claim 5, characterized in that, The control device is configured to control the switch to be turned off and the first switch to be turned on when the indoor heat exchanger is in cooling mode, and to control the switch to be turned on and the first switch to be turned off when the indoor heat exchanger is in heating mode.

7. The rapid cooling and heating composite system according to claim 1, characterized in that, The refrigerant circulation loop includes a second economizer, which includes a third pipe and a fourth pipe. The two ends of the third pipe are respectively connected to the first pipe and the indoor heat exchanger. One end of the fourth pipe is connected between the third pipe and the indoor heat exchanger through an electronic expansion valve, and the other end of the fourth pipe is connected to the compressor's return port.

8. The rapid cooling and heating composite system according to any one of claims 1-7, characterized in that, The system includes: The first temperature detection module is used to detect the refrigerant temperature between the first pipeline and the outdoor heat exchanger. High-pressure detection module, used to detect high-pressure; Outdoor ambient temperature detection module, used to detect outdoor ambient temperature Tao; The control module is configured to determine the corresponding saturation temperature CT based on the high pressure, acquire the refrigerant inlet temperature Tsci of the first pipeline and the outdoor ambient temperature Tao in cooling mode, determine the subcooling a = CT - Tsci, and determine the sound wave frequency and phase of the thermoacoustic conversion device based on the subcooling a and the outdoor ambient temperature Tao; and acquire the refrigerant outlet temperature Tsco of the first pipeline in heating mode, determine the subcooling a = CT - Tsco, and determine the sound wave frequency and phase of the thermoacoustic conversion device based on the subcooling a.

9. The rapid cooling and heating composite system according to claim 8, characterized in that, The control module is configured to, in cooling mode, increase the sound wave frequency and phase when Tao is lower than the first outdoor set temperature and a is lower than the first subcooling, and decrease the sound wave frequency and phase when Tao is lower than the first outdoor set temperature and a is higher than the first subcooling; increase the sound wave frequency and phase when Tao is higher than the second outdoor set temperature and a is lower than the second subcooling, and decrease the sound wave frequency and phase when Tao is higher than the second outdoor set temperature and a is higher than the second subcooling; when Tao is between the first outdoor set temperature and the second outdoor set temperature, control is performed according to a=x, where x is determined by the slope determined by Tao, the first outdoor set temperature, the second outdoor set temperature, the first subcooling, and the second subcooling, increasing the sound wave frequency and phase when a is lower than x, and decreasing the sound wave frequency and phase when a is higher than x; wherein the second outdoor set temperature is higher than the first outdoor set temperature, and the second subcooling is higher than the first subcooling. The control module is configured to, in heating mode, increase the frequency and phase of the sound wave when a is lower than the first subcooling degree, and decrease the frequency and phase of the sound wave when a is higher than the first subcooling degree.

10. The rapid cooling and heating composite system according to claim 9, characterized in that, An electric heating device is provided between the first room temperature heat exchanger and the hot end heat exchanger of the thermoacoustic conversion device. The system includes a second temperature detection module for detecting the temperature at the first port of the second pipeline and a third temperature detection module for detecting the temperature at the second port. The control module is configured to, in cooling mode, acquire the temperature at the first port and the second port of the second pipeline, and turn on the electric heating device when the temperature difference between the second port and the first port is lower than a set difference, and turn off the electric heating device when the temperature difference is higher than the set difference.

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