Fresh air fan air conditioning system, anti-frost control method and storage medium

Abstract

The present disclosure relates to a fresh air blower air conditioning system, an anti-frost control method and a storage medium. The fresh air fan air conditioning system includes: an air duct structure, including a fresh air duct (302) and an exhaust air duct (301); a full heat exchanger, having a full heat exchange core (303) arranged in the air duct structure, and configured to allow the fresh air entering the fresh air duct (302) and the exhaust air entering the exhaust air duct (301) to exchange heat in the full heat exchange core (303); a refrigerant circulation component, including a compressor (101) capable of forming a first refrigerant circuit, a first heat exchanger (103), a throttling device (104) and a second heat exchanger (304), the second heat exchanger (304) being located downstream of the full heat exchange core (303); a third heat exchanger (306), located upstream of the full heat exchange core (303); and an energy storage component, operably connected to the third heat exchanger (306), and configured to store heat energy obtained from the refrigerant circulation component and release heat energy to the third heat exchanger (306).

Description

Technical Field

[0001] The present disclosure relates to the technical field of air conditioning, and in particular to a fresh air blower air conditioning system, an anti-frost control method, and a storage medium. Background Art

[0002] In cold seasons, the temperature of the fresh air introduced by the fresh air fan is low, which makes the full heat exchanger operate at a lower temperature, while the indoor exhaust air has a high humidity content, so condensation is easy to form on the full heat exchanger. The condensed dew will solidify into frost under low temperature conditions, affecting the use effect of the full heat exchanger and shortening its life.

[0003] In order to reduce the risk of frost on the full heat exchanger, some related technologies increase the fresh air temperature or reduce the indoor exhaust air temperature by adding unit equipment. Summary of the Invention

[0004] The inventors have found through research that adding equipment to the relevant technology will result in higher cost investment and operating expenses.

[0005] In view of this, the embodiments of the present disclosure provide a fresh air fan air conditioning system, an anti-frost control method and a storage medium, which can reduce the frost risk of a full heat exchanger at a relatively low cost.

[0006] In one aspect of the present disclosure, a fresh air blower air conditioning system is provided, comprising:

[0007] Air duct structure, including fresh air duct and exhaust air duct;

[0008] a total heat exchanger having a total heat exchange core disposed in the air duct structure and configured to allow fresh air entering the fresh air duct to exchange heat with exhaust air entering the exhaust air duct within the total heat exchange core;

[0009] A refrigerant circulation assembly, comprising a compressor capable of forming a first refrigerant circuit, a first heat exchanger, a throttling device, and a second heat exchanger, wherein the second heat exchanger is disposed in the fresh air duct and downstream of the full heat exchange core along the fresh air flow direction;

[0010] A third heat exchanger is provided in the fresh air duct and is located upstream of the full heat exchange core along the fresh air flow direction;

[0011] The energy storage component is operably connected to the third heat exchanger and is configured to store thermal energy obtained from the refrigerant circulation component and release thermal energy to the third heat exchanger.

[0012] In some embodiments, the fresh air air conditioning system further includes:

[0013] a second refrigerant circuit connected in parallel with the second heat exchanger;

[0014] a first switching valve, disposed in the second refrigerant circuit, configured to open or close the second refrigerant circuit;

[0015] Wherein, the energy storage component is arranged in the second refrigerant circuit.

[0016] In some embodiments, the energy storage assembly includes:

[0017] an accumulator comprising an energy storage container, an energy storage material filled in the energy storage container, and an internal refrigerant pipeline provided in the energy storage container and located in the second refrigerant circuit, wherein the energy storage material exchanges heat with the refrigerant flowing through the internal refrigerant pipeline;

[0018] The third heat exchanger is connected in parallel with the first switching valve through a third refrigerant circuit, and the internal refrigerant pipeline is connected to the third refrigerant circuit, so that the refrigerant flowing out of the internal refrigerant pipeline exchanges heat with fresh air in the third heat exchanger.

[0019] In some embodiments, the fresh air air conditioning system further includes:

[0020] The second switching valve is provided in the third refrigerant circuit and is connected in series with the third heat exchanger.

[0021] In some embodiments, the third heat exchanger comprises an air-to-air heat exchanger.

[0022] In some embodiments, the energy storage assembly includes:

[0023] an accumulator comprising an energy storage container and an energy storage material filled in the energy storage container, the energy storage container having a first inlet for inflow of the energy storage material and a first outlet for outflow of the energy storage material, the first inlet and the first outlet being respectively connected to the third heat exchanger to form a fourth refrigerant circuit including the accumulator and the third heat exchanger;

[0024] The first pump is provided in the fourth refrigerant circuit and located between the first outlet and the third heat exchanger, and is configured to pump the energy storage material in the energy storage container into the third heat exchanger for heat exchange with fresh air.

[0025] In some embodiments, the accumulator further includes: an internal refrigerant pipeline disposed in the energy storage container and located in the second refrigerant circuit, and the energy storage material exchanges heat with the refrigerant flowing through the internal refrigerant pipeline.

[0026] In some embodiments, the third heat exchanger includes a preheating coil disposed in the fresh air duct.

[0027] In some embodiments, the fresh air air conditioning system further includes:

[0028] a second refrigerant circuit connected in parallel with the second heat exchanger;

[0029] The fourth heat exchanger has a first heat exchange pipeline and a second heat exchange pipeline. The first heat exchange pipeline is arranged in series in the second refrigerant circuit. One end of the second heat exchange pipeline is connected to a position between the first pump and the third heat exchanger in the fourth refrigerant circuit through a first pipeline. The other end of the second heat exchange pipeline is connected to a position between the third heat exchanger and the first inlet through a second pipeline, so that the refrigerant flowing through the first heat exchange pipeline and the energy storage material flowing through the second heat exchange pipeline can perform heat exchange in the fourth heat exchanger.

[0030] In some embodiments, the fresh air air conditioning system further includes:

[0031] The third switching valve is provided in the fourth refrigerant circuit and is configured to open or close the fourth refrigerant circuit.

[0032] In some embodiments, the fresh air air conditioning system further includes:

[0033] The fourth switching valve is provided in at least one of the first pipeline and the second pipeline.

[0034] In some embodiments, the fourth heat exchanger comprises a plate heat exchanger.

[0035] In some embodiments, the energy storage component is configured to store thermal energy obtained from the refrigerant circulation component during a first electricity price period, and release the thermal energy to the third heat exchanger when there is a risk of frost on the total heat exchanger.

[0036] In some embodiments, the first electricity price period is a low electricity price period.

[0037] In some embodiments, the energy storage assembly is configured to store thermal energy obtained from the first refrigerant circuit while the refrigerant circulation assembly implements a heating cycle through the first refrigerant circuit.

[0038] In one aspect of the present disclosure, there is provided an anti-frost control method for the aforementioned fresh air blower air conditioning system, comprising:

[0039] Obtaining the dew point temperature T1 at the inlet of the exhaust duct and the fresh air temperature T2 at the inlet of the fresh air duct;

[0040] The dew point temperature T1 and the fresh air temperature T2 are compared. If the dew point temperature T1 is greater than the fresh air temperature T2, it is determined that there is a risk of frost on the total heat exchanger, and the energy storage component is caused to release heat energy to the third heat exchanger.

[0041] In some embodiments, the step of obtaining the dew point temperature T1 at the inlet of the exhaust duct includes:

[0042] The exhaust air temperature and humidity at the inlet of the exhaust air duct are received, and the dew point temperature T1 is determined according to the exhaust air temperature and humidity.

[0043] In some embodiments, the anti-frost control method further includes:

[0044] When the refrigerant circulation component realizes the heating cycle through the first refrigerant circuit, obtaining the indoor temperature T3 of the indoor area where the fresh air blower air conditioning system acts;

[0045] The indoor temperature T3 is compared with a preset temperature threshold T4. If the indoor temperature T3 is lower than the preset temperature threshold T4, the amount of refrigerant circulating in the first refrigerant circuit is increased; otherwise, the amount of refrigerant circulating in the first refrigerant circuit is reduced.

[0046] In one aspect of the present disclosure, a computer-readable storage medium is provided, on which a computer program is stored. When the program is executed by a processor, the aforementioned anti-frost control method is implemented.

[0047] Therefore, according to the disclosed embodiment, the energy storage assembly captures heat energy from the refrigerant circulation assembly and releases it to a third heat exchanger located upstream of the heat exchange core within the fresh air duct. This allows the fresh air to be preheated by the third heat exchanger before reaching the heat exchange core, effectively raising the fresh air temperature and reducing the risk of frost on the heat exchanger. Compared to related technologies, this embodiment eliminates the need for additional equipment, effectively reducing the risk of frost on the heat exchanger at a lower equipment cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0049] The present disclosure can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0050] Figure 1A is a schematic structural diagram of some embodiments of the fresh air fan air conditioning system according to the present disclosure;

[0051] Figure 1B yes Figure 1A Schematic diagram of the structure of the accumulator;

[0052] Figure 2A 、 Figure 2B 、 Figure 2C and Figure 2D They are Figure 1ASchematic diagram of medium circulation when the embodiment operates in conventional heating mode, heat storage mode, heat storage and heating mode, and anti-frost heating mode;

[0053] Figure 3A is a schematic structural diagram of some other embodiments of the fresh air fan air conditioning system according to the present disclosure;

[0054] Figure 3B yes Figure 3A Schematic diagram of the structure of the accumulator;

[0055] Figure 4 FIG3 is a schematic diagram of the medium circulation principle of the embodiment running in the anti-frost heating mode;

[0056] Figure 5A is a structural schematic diagram of some further embodiments of the fresh air blower air conditioning system according to the present disclosure;

[0057] Figure 5B yes Figure 5A Schematic diagram of the structure of the accumulator;

[0058] Figure 6A and Figure 6B They are Figure 5A Schematic diagram of medium circulation when the embodiment operates in heat storage mode and anti-frost heating mode;

[0059] Figure 7 is a flow chart of some embodiments of the anti-frost control method for a fresh air blower air conditioning system according to the present disclosure;

[0060] Figure 8 It is a flow chart of other embodiments of the anti-frost control method of the fresh air blower air conditioning system according to the present disclosure.

[0061] It should be understood that the size of each part shown in the drawings is not drawn according to the actual proportional relationship.In addition, the same or similar reference numerals represent the same or similar components. DETAILED DESCRIPTION

[0062] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the present disclosure, its application, or use. The present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present disclosure thorough and complete and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of parts and steps, the composition of materials, numerical expressions, and numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary and not as limiting.

[0063] The terms "first", "second" and similar terms used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. The terms "include" or "comprises" and similar terms mean that the elements before the term include the elements listed after the term, and do not exclude the possibility of also including other elements. The terms "upper", "lower", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0064] In the present disclosure, when a specific device is described as being located between a first device and a second device, an intervening device may or may not be present between the specific device and the first device or the second device. When a specific device is described as being connected to another device, the specific device may be directly connected to the other device without an intervening device, or may be not directly connected to the other device but with an intervening device.

[0065] All terms (including technical or scientific terms) used in this disclosure have the same meaning as those understood by one of ordinary skill in the art to which this disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in, for example, general dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealized or highly formal sense, unless explicitly defined herein.

[0066] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0067] Figure 1A It is a structural schematic diagram of some embodiments of the fresh air fan air conditioning system according to the present disclosure. Figure 3A It is a structural schematic diagram of some other embodiments of the fresh air fan air conditioning system according to the present disclosure. Figure 5A Schematic diagram of the structure of some other embodiments of the fresh air blower air conditioning system according to the present disclosure. Figure 1A 、 Figure 3A and Figure 5A The present disclosure provides a fresh air fan air conditioning system, comprising: an air duct structure, a total heat exchanger, a refrigerant circulation assembly, a third heat exchanger 306, and an energy storage assembly. The air duct structure includes a fresh air duct 302 and an exhaust air duct 301. The fresh air duct 302 is used to deliver fresh air to the indoor area where the fresh air fan air conditioning system is operating. The exhaust air duct 301 is used to discharge exhaust air from the indoor area.

[0068] The total heat exchanger includes a total heat exchange core 303 disposed within the air duct structure. The total heat exchanger is configured to exchange heat within the total heat exchange core 303 between fresh air entering the fresh air duct 302 and exhaust air entering the exhaust air duct 301. The total heat exchanger allows indoor exhaust air and fresh air to flow through the total heat exchange core in a cross-flow pattern, achieving a total heat exchange process through heat and mass transfer between the indoor exhaust air and the fresh air.

[0069] The refrigerant circulation assembly includes a compressor 101, a first heat exchanger 103, a throttling device 104, and a second heat exchanger 304, which form a first refrigerant circuit. The second heat exchanger 304 is disposed within the fresh air duct 302 and is located downstream of the total heat exchange core 303 along the fresh air flow direction. The second heat exchanger 304 may include an air-to-air heat exchanger and may employ a coil, finned coil, microchannel, or other structural form.

[0070] Compressor 101 can perform work on the refrigerant to achieve refrigerant circulation in the first refrigerant circuit. The throttling device 104 can be a capillary tube, an electronic expansion valve, or the like. When the first refrigerant circuit is a heating circuit, the first heat exchanger 103 and the second heat exchanger 304 serve as the evaporator and condenser, respectively, in the first refrigerant circuit. The second heat exchanger 304 can heat the fresh air flowing through the full heat exchange core 303 and output it to the indoor area through the fresh air outlet, achieving the heating process.

[0071] exist Figure 1A In the embodiment, the refrigerant circulation assembly may further include a four-way valve 102 and a gas-liquid separator 105. The four-way valve 102 may be disposed at the exhaust port of the compressor 101 to implement a heating cycle or a cooling cycle of the first refrigerant circuit. The gas-liquid separator 105 may be disposed at the intake port of the compressor 101 to separate the gas and liquid of the refrigerant entering the compressor 101.

[0072] The third heat exchanger 306 is disposed within the fresh air duct 302 and upstream of the total heat exchange core 303 along the fresh air flow direction. The third heat exchanger 306 may include an air-to-air heat exchanger, which may employ a coil, finned coil, microchannel, or other structural form. An energy storage assembly is operably connected to the third heat exchanger 306 and is configured to store thermal energy obtained from the refrigerant circulation assembly and release thermal energy to the third heat exchanger 306.

[0073] The energy storage component captures heat energy from the refrigerant circulation assembly and releases it to a third heat exchanger located upstream of the heat exchange core within the fresh air duct. This preheats the fresh air before it reaches the heat exchange core, effectively raising the fresh air temperature and reducing the risk of frost on the heat exchanger. This also correspondingly increases the indoor supply air temperature. Compared to related technologies, this embodiment eliminates the need for additional equipment, effectively reducing the risk of frost on the heat exchanger at a lower cost.

[0074] refer to Figure 1A 、 Figure 3A and Figure 5A In some embodiments, the fresh air air conditioning system further includes: a second refrigerant circuit and a first switching valve 203. The second refrigerant circuit is connected in parallel with the second heat exchanger 304. The energy storage assembly is disposed in the second refrigerant circuit. The energy storage assembly can obtain heat energy from the refrigerant circulation assembly via the second refrigerant circuit, for example, from the exhaust port of a compressor or the inlet of a condenser.

[0075] A first switching valve 203 is disposed in the second refrigerant circuit and is configured to open or close the second refrigerant circuit. The first switching valve 203 may be an electronic expansion valve or a solenoid on-off valve. When the first switching valve 203 opens the second refrigerant circuit, the fresh air blower air conditioning system can operate in either energy storage mode or heat storage and heating mode. When the first switching valve 203 closes the second refrigerant circuit, the fresh air blower air conditioning system can operate in either conventional heating mode or frost-proof heating mode.

[0076] exist Figure 1A 、 Figure 3A and Figure 5A In the embodiment, the refrigerant circulation component may further include a fifth switching valve 305, which is connected in series with the second heat exchanger 304 and then in parallel with the second refrigerant circuit. The fifth switching valve 305 is configured to connect or disconnect the first refrigerant circuit. The fifth switching valve 305 may be an electronic expansion valve or an electromagnetic on-off valve. When the fifth switching valve 305 connects the first refrigerant circuit, the fresh air blower air conditioning system can achieve a normal heating mode, a heat storage and heating mode, or a frost prevention and heating mode, and can also achieve a cooling mode. When the fifth switching valve 305 disconnects the first refrigerant circuit, the fresh air blower air conditioning system can achieve a heat storage mode.

[0077] Figure 1B yes Figure 1A Schematic diagram of the structure of the accumulator. Figure 2A 、 Figure 2B 、 Figure 2C and Figure 2D They are Figure 1A Schematic diagram of medium circulation when the embodiment operates in conventional heating mode, heat storage mode, heat storage and heating mode, and anti-frost heating mode. Figures 1A to 2D In some embodiments, the energy storage assembly includes an accumulator 201. The accumulator 201 includes an energy storage container 2011, an energy storage material filled in the energy storage container 2011, and an internal refrigerant pipeline 2012 disposed in the energy storage container 2011 and located in the second refrigerant circuit. The energy storage material exchanges heat with the refrigerant flowing through the internal refrigerant pipeline 2012.

[0078] The energy storage material filled in the energy storage container 2011 can be water or other energy storage materials. The refrigerant discharged from the compressor 101 can flow into the internal refrigerant flow path 2012 of the accumulator 201 through the second refrigerant circuit, exchange heat with the energy storage material in the energy storage container 2011, and then flow out through the liquid separator 202.

[0079] The third heat exchanger 306 is connected in parallel with the first switching valve 203 via a third refrigerant circuit, and the internal refrigerant pipeline is connected to the third refrigerant circuit, so that the refrigerant flowing out of the internal refrigerant pipeline exchanges heat with the fresh air in the third heat exchanger 306. In this way, the work of the compressor in the refrigerant circulation assembly causes the accumulator 201 to input high-temperature refrigerant into the third heat exchanger 306, achieving a preheating effect on the fresh air inputted into the fresh air inlet, eliminating the need for equipment such as a pump to drive the flow of refrigerant in the accumulator 201, and reducing the cost of the air conditioning system. In addition, the energy storage material of the accumulator of this embodiment can be applied to various types of phase change materials and non-phase change materials, thus having a wider range of applications.

[0080] refer to Figure 1A 、 Figures 2A to 2D In some embodiments, the fresh air air conditioning system further includes: a second switching valve 307 disposed in the third refrigerant circuit. The second switching valve 307 is connected in series with the third heat exchanger 306. The second switching valve 307 can be an electronic expansion valve or an electromagnetic on-off valve.

[0081] Second switching valve 307 can open or close the third refrigerant circuit. When second switching valve 307 opens the third refrigerant circuit, the fresh air blower air conditioning system can operate in frost-proof heating mode. When second switching valve 307 closes the third refrigerant circuit, the fresh air blower air conditioning system can operate in normal heating mode, heat storage mode, heat storage and heating mode, and cooling mode.

[0082] Figures 2A to 2D The status of valves, heat exchangers and expansion valves corresponding to each mode involved can be found in the table below.

[0083]

[0084] In the heating season, when the outdoor temperature is high, you can use Figure 2AConventional heating mode is shown. In conventional heating mode, on the refrigerant side, the high-temperature, high-pressure refrigerant discharged from the compressor 101 enters the second heat exchanger 304 through the four-way valve 102 for condensation. After releasing heat, it passes through the throttling device 104 and enters the first heat exchanger 103 for evaporation. It then passes through the four-way valve 102 and enters the gas-liquid separator 105 before returning to the compressor 101. On the air side, fresh air enters the fresh air duct 302 from the fresh air inlet, undergoes heat exchange with the indoor exhaust air in the full heat exchange core 303 and is preheated. It then enters the second heat exchanger 304 to absorb the heat released by the refrigerant and is further heated. Finally, it enters the indoor room through the fresh air outlet to achieve heating. The indoor exhaust air enters the exhaust duct 301 from the exhaust inlet, undergoes heat exchange with the fresh air in the full heat exchange core 303, and is discharged to the outside through the exhaust outlet.

[0085] During the heating season, when there is no demand for heating and the electricity price is low, the heat storage mode can be used. For example, in some embodiments, for a business scenario with a stepped electricity price, the energy storage component is configured to store the heat energy obtained from the refrigerant circulation component during the first electricity price period, and release the heat energy to the third heat exchanger 306 when there is a risk of frost on the full heat exchanger. The first electricity price period can be any one of the electricity price periods corresponding to multiple stepped electricity prices. Preferably, the first electricity price period can be a valley electricity price period. At this time, due to the low electricity price, the heat storage mode can be used to realize the heat storage process of the energy storage component and reduce operating costs. The first electricity price period is not limited to the valley electricity price period, and can also be a flat electricity price period that is lower than the peak electricity price.

[0086] exist Figure 2B In the thermal storage mode shown, on the refrigerant side, the high-temperature, high-pressure refrigerant discharged from compressor 101 passes through four-way valve 102 and enters accumulator 201 for condensation, storing heat in accumulator 201. The refrigerant is then collected and discharged through liquid separator 202, enters first heat exchanger 103 for evaporation, passes through four-way valve 102 again, enters gas-liquid separator 105, and returns to compressor 101. The air side does not operate. In thermal storage mode, a higher condensing temperature than in conventional heating mode can be used to heat the energy storage material in accumulator 201 to a high temperature. This not only fully utilizes off-peak electricity prices for heat storage, but also ensures that sufficient heat is provided to preheat the fresh air during heat release.

[0087] During the heating season, when there is a need for both heating and heat storage, a heat storage and heating mode can be used. The energy storage component can be configured to store heat energy obtained from the first refrigerant circuit while the refrigerant circulation component performs a heating cycle through the first refrigerant circuit.

[0088] exist Figure 2CIn the heat storage and heating mode shown, on the refrigerant side, the high-temperature, high-pressure refrigerant discharged from compressor 101 is split into two paths after passing through four-way valve 102. One path enters accumulator 201 for condensation, storing heat there. The other path enters second heat exchanger 304 for condensation, releases heat, and then merges with the first path of refrigerant. It then enters first heat exchanger 103 for evaporation, passes through four-way valve 102 again, enters gas-liquid separator 105, and returns to compressor 101. On the air side, fresh air enters fresh air duct 302 from the fresh air inlet, exchanges heat with indoor exhaust air in total heat exchange core 303, then enters second heat exchanger 304 to absorb the heat released by the refrigerant for further heating. It then enters the indoor space through the fresh air outlet to heat the room. Indoor exhaust air enters exhaust duct 301 from the exhaust inlet, exchanges heat with fresh air in total heat exchange core 303, and is discharged outdoors through the exhaust outlet.

[0089] During the heating season, when the outdoor temperature is low and there is a risk of condensation and frost, you can use the anti-frost heating mode. Figure 2D In the illustrated anti-frost heating mode, on the refrigerant side: the high-temperature, high-pressure refrigerant discharged from the compressor 101 is divided into two paths after passing through the four-way valve 102. One path enters the accumulator 201 for further heating (superheating), enters the third heat exchanger 306 for condensation and heat release, and the other path enters the second heat exchanger 304 for condensation. After releasing heat, it merges with the first path of refrigerant, enters the first heat exchanger 103 for evaporation, passes through the four-way valve 102 again, enters the gas-liquid separator 105, and returns to the compressor 101. On the air side: fresh air enters the fresh air duct 302 from the fresh air inlet, is preheated in the third heat exchanger 306 to increase its temperature, then enters the full heat exchange core 303 for heat exchange with the indoor exhaust air, enters the second heat exchanger 304 to absorb the heat released by the refrigerant, and is further heated. It then enters the indoor heating system through the fresh air outlet. Indoor exhaust air enters the exhaust duct 301 through the exhaust inlet, exchanges heat with fresh air in the heat exchange core 303, and is discharged outdoors through the exhaust outlet. Because the accumulator 201 already stores relatively high-temperature heat, only a small amount of refrigerant is required to enter the preheating circuit to preheat the fresh air to above the exhaust air dew point. Since the fresh air is preheated in the third heat exchanger 306, its temperature when entering the heat exchange core 303 is not too low, thereby causing the heat exchanger to remain cold. Consequently, condensation and frost are avoided when the indoor exhaust air passes through the heat exchange core 303.

[0090] Figure 3B yes Figure 3A Schematic diagram of the structure of the accumulator. Figure 4 for Figure 3A Schematic diagram of medium circulation in anti-frost heating mode. Figure 3A and Figure 4 In some embodiments, the energy storage assembly includes: an accumulator 201 and a first pump 308 .

[0091] refer to Figure 3B The accumulator 201 includes an energy storage container 2011 and an energy storage material filled in the energy storage container. The energy storage container 2011 has a first inlet for the energy storage material to flow in and a first outlet for the energy storage material to flow out. The first inlet and the first outlet are respectively connected to the third heat exchanger 306 to form a fourth refrigerant circuit including the accumulator 201 and the third heat exchanger 306. Figure 3B In the embodiment, the accumulator 201 further includes an internal refrigerant pipeline 2012 provided in the energy storage container 2011 and located in the second refrigerant circuit, and the energy storage material exchanges heat with the refrigerant flowing through the internal refrigerant pipeline 2012 .

[0092] The first pump 308 is provided in the fourth refrigerant circuit and is located between the first outlet and the third heat exchanger 306 , and is configured to pump the energy storage material in the energy storage container into the third heat exchanger 306 for heat exchange with fresh air.

[0093] In this embodiment, the accumulator can be driven independently by the first pump 308 and is not dependent on the compressor 101 in the refrigerant circulation assembly, thereby providing greater flexibility in capacity allocation of the accumulator and achieving higher adaptability to working conditions.

[0094] refer to Figure 3A and Figure 4 In some embodiments, the third heat exchanger 306 includes a preheating coil 309 disposed in the fresh air duct 302. A liquid energy storage material, such as water, can circulate within the preheating coil 309. Accordingly, the first pump 308 can be a water pump to drive the energy storage material.

[0095] and Figure 1A Compared with the embodiment shown, Figure 3A The embodiment shown realizes normal heating mode, heat storage mode and heat storage and heating mode. Figure 1A The corresponding modes implemented in the embodiments shown are basically the same and will not be described in detail here. Figure 4 Shown Figure 3A The embodiment shown is Figure 1A The illustrated embodiment differs from the anti-frost heating mode.

[0096] refer to Figure 4In frost-proof heating mode, on the refrigerant side, the high-temperature, high-pressure refrigerant discharged from compressor 101 passes through four-way valve 102 and enters second heat exchanger 304 for condensation. After releasing heat, it enters first heat exchanger 103 for evaporation, passes through four-way valve 102 again, enters gas-liquid separator 105, and returns to compressor 101. On the energy storage material side, the energy storage material in accumulator 201, driven by first pump 308, enters preheating coil 309, releases heat to the fresh air, and then returns to accumulator 201. On the air side, fresh air enters fresh air duct 302 through the fresh air inlet, is preheated in preheating coil 309 to raise its temperature, then enters full heat exchange core 303 for heat exchange with indoor exhaust air. It then enters second heat exchanger 304 to absorb the heat released by the refrigerant and further heats the air before entering the indoor space through the fresh air outlet for heating. The indoor exhaust air enters the exhaust duct 301 from the exhaust inlet, exchanges heat with the fresh air in the full heat exchange core 303, and is discharged to the outside through the exhaust outlet.

[0097] Figure 5B yes Figure 5A Schematic diagram of the structure of the accumulator. Figure 6A and Figure 6B They are Figure 5A Schematic diagram of medium circulation in thermal storage mode and anti-frost heating mode. Figure 5B The accumulator 201 includes an energy storage container 2011 and an energy storage material filled in the energy storage container. The energy storage container 2011 has a first inlet for the energy storage material to flow in and a first outlet for the energy storage material to flow out. The first inlet and the first outlet are respectively connected to the third heat exchanger 306 to form a fourth refrigerant circuit including the accumulator 201 and the third heat exchanger 306. Figure 5B In the embodiment, the accumulator 201 may further include: a liquid distributor 2013 , which is connected to the first inlet and is disposed in the energy storage container 2011 .

[0098] The first pump 308 is provided in the fourth refrigerant circuit and is located between the first outlet and the third heat exchanger 306 , and is configured to pump the energy storage material in the energy storage container into the third heat exchanger 306 for heat exchange with fresh air.

[0099] In this embodiment, the accumulator can be driven independently by the first pump 308, independent of the compressor 101 in the refrigerant circulation assembly. This allows for greater flexibility in accumulator capacity allocation and greater adaptability to operating conditions. Furthermore, there is no need for internal circulation piping within the accumulator, reducing the space occupied by the energy storage material within the storage container and increasing the amount of available energy storage material.

[0100] refer to Figure 5AIn some embodiments, the fresh air blower air conditioning system further includes: a fourth heat exchanger 204 having a first heat exchange pipeline and a second heat exchange pipeline. The fourth heat exchanger 204 may include a plate heat exchanger. Figure 5A In the embodiment, the first heat exchange pipeline and the second heat exchange pipeline are located inside the fourth heat exchanger 204 and are not shown, but Figure 5A It can be seen that the fourth heat exchanger 204 has four connection ports, two of which are the two ends of the first heat exchange pipeline, and the other two ports are the two ends of the second heat exchange pipeline.

[0101] A first heat exchange pipeline is arranged in series in the second refrigerant circuit. One end of the second heat exchange pipeline is connected to a position between the first pump and the third heat exchanger 306 in the fourth refrigerant circuit via a first pipeline, and the other end of the second heat exchange pipeline is connected to a position between the third heat exchanger 306 and the first inlet via a second pipeline, so that the refrigerant flowing through the first heat exchange pipeline and the energy storage material flowing through the second heat exchange pipeline perform heat exchange in the fourth heat exchanger 204.

[0102] refer to Figure 5A 、 Figure 6A and Figure 6B In some embodiments, the third heat exchanger 306 includes a preheating coil 309 disposed in the fresh air duct 302. A liquid energy storage material, such as water, can circulate within the preheating coil 309. Accordingly, the first pump 308 can be a water pump to drive the energy storage material.

[0103] In order to realize the switching of the circulation loop of the energy storage material in the preheating coil 309 or the fourth heat exchanger 204, refer to Figure 5A In some embodiments, the fresh air blower air conditioning system may further include a third switching valve 311 disposed in the fourth refrigerant circuit and configured to open or close the fourth refrigerant circuit. The fresh air blower air conditioning system may further include a fourth switching valve 310 disposed in at least one of the first pipeline and the second pipeline. The third switching valve 311 and the fourth switching valve 310 may be electronic expansion valves or electromagnetic on-off valves.

[0104] and Figure 1A Compared with the embodiment shown, Figure 5A The embodiment shown realizes the common heating mode and Figure 1A The corresponding modes implemented in the embodiments shown are basically the same and will not be described in detail here. Figure 6A and Figure 6B Shown respectively Figure 5A The embodiment shown is Figure 1A The embodiment shown distinguishes between the heat storage mode and the anti-frost heating mode. The heat storage and heating mode is equivalent to the combination of the conventional heating mode and the heat storage mode, and will not be described in detail here.

[0105] refer to Figure 6A In thermal storage mode, on the refrigerant side, the high-temperature, high-pressure refrigerant discharged from compressor 101 passes through four-way valve 102 and enters fourth heat exchanger 204, where it condenses, exchanges heat with the energy storage material, enters first heat exchanger 103 for evaporation, passes through four-way valve 102 again, enters gas-liquid separator 105, and returns to compressor 101. On the energy storage material side, with fourth switching valve 310 open and third switching valve 311 closed, the energy storage material, driven by first pump 308, enters fourth heat exchanger 204, exchanges heat with the refrigerant, absorbs heat, and returns to accumulator 201. The air side does not operate.

[0106] refer to Figure 6B In frost-proof heating mode, on the refrigerant side, the high-temperature, high-pressure refrigerant discharged from compressor 101 passes through four-way valve 102 and enters fresh air heater 304 for condensation. After releasing heat, it enters first heat exchanger 103 for evaporation. It then passes through four-way valve 102 again and enters gas-liquid separator 105 before returning to compressor 101. On the energy storage material side, with third switching valve 311 open and fourth switching valve 310 closed, the energy storage material in accumulator 201, driven by first pump 308, enters preheating coil 309, releases heat to the fresh air, and then returns to accumulator 201. On the air side, fresh air enters fresh air duct 302 through the fresh air inlet, is preheated in preheating coil 309 to raise its temperature, then enters full heat exchange core 303 for heat exchange with indoor exhaust air. It then enters second heat exchanger 304 to absorb the heat released by the refrigerant and further heat it before entering the indoor space through the fresh air outlet for heating. The indoor exhaust air enters the exhaust duct 301 from the exhaust inlet, exchanges heat with the fresh air in the full heat exchange core 303, and is discharged to the outside through the exhaust outlet.

[0107] Figure 7 This is a flow chart of some embodiments of the anti-frost control method for the fresh air blower air conditioning system according to the present disclosure. Based on the various embodiments of the fresh air blower air conditioning system according to the present disclosure, the embodiments of the present disclosure also include the anti-frost control method of the aforementioned fresh air blower air conditioning system embodiments. Figure 7 As with any of the aforementioned embodiments of the fresh air blower air conditioning system, the anti-frost control method includes steps S1 and S2. In step S1, the dew point temperature T1 at the inlet of the exhaust duct 301 and the fresh air temperature T2 at the inlet of the fresh air duct 302 are obtained. In step S2, the dew point temperature T1 and the fresh air temperature T2 are compared. If the dew point temperature T1 is greater than the fresh air temperature T2, it is determined that there is a risk of frost on the total heat exchanger, and the energy storage assembly is caused to release heat energy to the third heat exchanger 306.

[0108] To determine the dew point temperature T1 at the inlet of the exhaust duct 301, the exhaust air temperature and humidity at the inlet of the exhaust duct 301 may be received and the dew point temperature T1 may be determined based on the exhaust air temperature and humidity. The dew point temperature T1 is the temperature at which gaseous water in the air must drop to saturate and condense into liquid water under a fixed atmospheric pressure. The processor may pre-store an algorithm or table for calculating the dew point temperature, thereby determining the dew point temperature based on the exhaust air temperature and humidity.

[0109] Figure 8 1 is a flow chart of other embodiments of the anti-frost control method for the fresh air blower air conditioning system according to the present disclosure. Figure 8 In some embodiments, the anti-frost control method may further include: step S3 and step S4. In step S3, when the refrigerant circulation component realizes the heating cycle through the first refrigerant circuit, the indoor temperature T3 of the indoor area where the fresh air blower air conditioning system acts is obtained.

[0110] In step S4, the indoor temperature T3 is compared with a preset temperature threshold T4. If the indoor temperature T3 is lower than the preset temperature threshold T4, the amount of refrigerant circulating in the first refrigerant circuit is increased; otherwise, the amount of refrigerant circulating in the first refrigerant circuit is reduced.

[0111] With reference to the various embodiments of the aforementioned anti-frost control method of the present disclosure, an embodiment of the present disclosure further provides a computer-readable storage medium having a computer program stored thereon, which implements the anti-frost control method of any of the aforementioned embodiments when executed by a processor.

[0112] In one or more exemplary embodiments, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software as a computer program product, the functions may be stored on or transmitted via a computer-readable medium as one or more instructions or codes. Computer-readable media include both computer storage media and communication media, including any media that facilitates the transfer of a computer program from one location to another. A storage medium may be any available medium that can be accessed by a computer. By way of example and not limitation, such computer-readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Any connection is also properly referred to as a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwaves, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwaves are included in the definition of medium. As used herein, disk and disc include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc, where disks typically reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

[0113] The various embodiments in this specification are described in a progressive manner, with different focuses between the embodiments. References to the common or similar parts between the embodiments are sufficient. For the method embodiments, the overall structure and steps involved correspond to those in the system embodiments, so the description is relatively simple. For relevant parts, references to the system embodiments are sufficient.

[0114] Thus far, various embodiments of the present disclosure have been described in detail. To avoid obscuring the concept of the present disclosure, some details known in the art have not been described. Based on the above description, those skilled in the art can fully understand how to implement the technical solutions disclosed herein.

[0115] Although some specific embodiments of the present disclosure have been described in detail through examples, those skilled in the art will understand that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. Those skilled in the art will understand that the above embodiments may be modified or some technical features may be replaced with equivalents without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A fresh air blower air conditioning system, characterized in that: include: An air duct structure, comprising a fresh air duct (302) and an exhaust air duct (301); A total heat exchanger having a total heat exchange core (303) disposed in the air duct structure, configured to allow fresh air entering the fresh air duct (302) and exhaust air entering the exhaust air duct (301) to perform heat exchange within the total heat exchange core (303); A refrigerant circulation component, comprising a compressor (101) capable of forming a first refrigerant circuit, a first heat exchanger (103), a throttling device (104), and a second heat exchanger (304), wherein the second heat exchanger (304) is arranged in the fresh air duct (302) and is located downstream of the full heat exchange core (303) along the fresh air flow direction; A third heat exchanger (306) is arranged in the fresh air duct (302) and is located upstream of the full heat exchange core (303) along the fresh air flow direction; an energy storage component, operably connected to the third heat exchanger (306), configured to store heat energy obtained from the refrigerant circulation component and release heat energy to the third heat exchanger (306); a second refrigerant circuit connected in parallel with the second heat exchanger (304); and A first switching valve (203), provided in the second refrigerant circuit, configured to open or close the second refrigerant circuit; Wherein, the energy storage component is arranged in the second refrigerant circuit.

2. The fresh air blower air conditioning system according to claim 1, characterized in that: The energy storage component comprises: The accumulator (201) comprises an energy storage container (2011), an energy storage material filled in the energy storage container (2011), and an internal refrigerant pipeline (2012) provided in the energy storage container (2011) and located in the second refrigerant circuit, wherein the energy storage material exchanges heat with the refrigerant flowing through the internal refrigerant pipeline (2012); The third heat exchanger (306) is connected in parallel with the first switching valve (203) through a third refrigerant circuit, and the internal refrigerant pipeline (2012) is connected to the third refrigerant circuit so that the refrigerant flowing out of the internal refrigerant pipeline (2012) exchanges heat with the fresh air in the third heat exchanger (306).

3. The fresh air blower air conditioning system according to claim 2, characterized in that: Also includes: The second switching valve (307) is arranged in the third refrigerant circuit and is connected in series with the third heat exchanger (306).

4. The fresh air blower air conditioning system according to claim 2, characterized in that: The third heat exchanger (306) comprises an air-to-air heat exchanger.

5. The fresh air blower air conditioning system according to claim 1, characterized in that: The energy storage component comprises: An accumulator (201) comprises an energy storage container (2011) and an energy storage material filled in the energy storage container (2011), the energy storage container (2011) having a first inlet for the energy storage material to flow in and a first outlet for the energy storage material to flow out, the first inlet and the first outlet being respectively connected to the third heat exchanger (306) to form a fourth refrigerant circuit comprising the accumulator (201) and the third heat exchanger (306); The first pump (308) is arranged in the fourth refrigerant circuit and is located between the first outlet and the third heat exchanger (306), and is configured to pump the energy storage material in the energy storage container (2011) into the third heat exchanger (306) to exchange heat with fresh air.

6. The fresh air blower air conditioning system according to claim 5, characterized in that: The accumulator (201) further comprises: an internal refrigerant pipeline (2012) provided in the energy storage container (2011) and located in the second refrigerant circuit, wherein the energy storage material exchanges heat with the refrigerant flowing through the internal refrigerant pipeline (2012).

7. The fresh air blower air conditioning system according to claim 5, characterized in that: The third heat exchanger (306) includes a preheating coil (309) arranged in the fresh air duct (302).

8. The fresh air blower air conditioning system according to claim 5, characterized in that: Also includes: The fourth heat exchanger (204) has a first heat exchange pipeline and a second heat exchange pipeline, wherein the first heat exchange pipeline is arranged in series in the second refrigerant circuit, one end of the second heat exchange pipeline is connected to a position between the first pump and the third heat exchanger (306) in the fourth refrigerant circuit through the first pipeline, and the other end of the second heat exchange pipeline is connected to a position between the third heat exchanger (306) and the first inlet through the second pipeline, so that the refrigerant flowing through the first heat exchange pipeline and the energy storage material flowing through the second heat exchange pipeline can perform heat exchange in the fourth heat exchanger (204).

9. The fresh air blower air conditioning system according to claim 8, characterized in that: Also includes: The third switching valve (311) is provided in the fourth refrigerant circuit and is configured to connect or disconnect the fourth refrigerant circuit.

10. The fresh air blower air conditioning system according to claim 8, characterized in that: Also includes: A fourth switching valve (310) is provided in at least one of the first pipeline and the second pipeline.

11. The fresh air blower air conditioning system according to claim 8, characterized in that: The fourth heat exchanger (204) comprises a plate heat exchanger.

12. The fresh air blower air conditioning system according to any one of claims 1 to 11, characterized in that: The energy storage component is configured to store heat energy obtained from the refrigerant circulation component during a first electricity price period, and release the heat energy to the third heat exchanger (306) when there is a risk of frost on the total heat exchanger.

13. The fresh air blower air conditioning system according to claim 12, characterized in that: The first electricity price period is a low electricity price period.

14. The fresh air blower air conditioning system according to any one of claims 1 to 11, characterized in that: The energy storage component is configured to store heat energy obtained from the first refrigerant circuit while the refrigerant circulation component implements a heating cycle through the first refrigerant circuit.

15. An anti-frost control method for a fresh air blower air conditioning system according to any one of claims 1 to 14, characterized in that: include: Obtaining the dew point temperature T1 at the inlet of the exhaust air duct (301) and the fresh air temperature T2 at the inlet of the fresh air duct (302); The dew point temperature T1 and the fresh air temperature T2 are compared. If the dew point temperature T1 is greater than the fresh air temperature T2, it is determined that there is a risk of frost on the total heat exchanger, and the energy storage component is caused to release heat energy to the third heat exchanger (306).

16. The anti-frost control method according to claim 15, characterized in that: The step of obtaining the dew point temperature T1 at the inlet of the exhaust duct (301) comprises: The exhaust air temperature and humidity at the inlet of the exhaust air duct (301) are received, and the dew point temperature T1 is determined based on the exhaust air temperature and humidity.

17. The anti-frost control method according to claim 15, characterized in that: Also includes: When the refrigerant circulation component realizes the heating cycle through the first refrigerant circuit, obtaining the indoor temperature T3 of the indoor area where the fresh air blower air conditioning system acts; The indoor temperature T3 is compared with a preset temperature threshold T4. If the indoor temperature T3 is lower than the preset temperature threshold T4, the amount of refrigerant circulating in the first refrigerant circuit is increased; otherwise, the amount of refrigerant circulating in the first refrigerant circuit is reduced.

18. A computer-readable storage medium having a computer program stored thereon, wherein when the program is executed by a processor, the anti-frost control method according to any one of claims 15 to 17 is implemented.

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