A home appliance integrated air conditioning system and a control method for the home appliance integrated air conditioning system.

Abstract

This invention provides a home appliance-integrated air conditioning system and a control method for the system. The home appliance-integrated air conditioning system includes: a first heat exchange device, a second heat exchange device, and a third heat exchange device. The first heat exchange device includes a compressor, an indoor heat exchanger, an outdoor heat exchanger, and a first four-way reversing valve, which connects the compressor, the indoor heat exchanger, and the outdoor heat exchanger. The second heat exchange device includes a second heat exchanger and a second four-way reversing valve. The second inlet of the second heat exchanger is connected to the exhaust port of the compressor, and the second four-way reversing valve connects the exhaust port and the second inlet. The third heat exchange device includes a third heat exchanger, which connects the second outlet of the second heat exchanger and the suction port of the compressor. The refrigerant is rationally distributed through the adjustment of the first and second four-way reversing valves. This invention solves the technical problem in the prior art where refrigerators, air conditioners, heat pump water heaters, and other devices are independent, and energy is not effectively integrated and utilized.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more specifically, to a home appliance integrated air conditioning system and a control method for the home appliance integrated air conditioning system. Background Technology

[0002] With economic development and improved living standards, air conditioners, refrigerators, and hot water have become necessities. Almost every household now owns these appliances, but they are typically used independently, which is not conducive to energy conservation. At the same time, the government strongly advocates energy conservation policies, and the development of energy-efficient household appliances is a growing trend.

[0003] However, in actual construction, there is a problem: in existing technologies, devices such as refrigerators, air conditioners, and heat pump water heaters are independent of each other, and energy cannot be effectively integrated and utilized. Summary of the Invention

[0004] This invention solves the technical problem in the prior art where refrigerators, air conditioners, heat pump water heaters, and other devices are independent of each other, and energy cannot be effectively integrated and utilized.

[0005] To address the aforementioned problems, this invention provides a home appliance-integrated air conditioning system, comprising: a first heat exchange device, which includes a compressor, an indoor heat exchanger, an outdoor heat exchanger, and a first four-way reversing valve, the first four-way reversing valve connecting the compressor, the indoor heat exchanger, and the outdoor heat exchanger, the compressor driving refrigerant to circulate in a refrigerant circulation pipeline; a second heat exchange device, which includes a second heat exchanger and a second four-way reversing valve, the second inlet of the second heat exchanger being connected to the exhaust port of the compressor, the second four-way reversing valve being connected to the exhaust port and the second inlet; and a third heat exchange device, which includes a third heat exchanger, the third heat exchanger being connected to the second outlet of the second heat exchanger and the suction port of the compressor.

[0006] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: According to the embodiments of the present invention, the home appliance composite air conditioning system achieves reasonable distribution of refrigerant (that is, reasonable refrigerant flow path distribution control) through the adjustment of the first four-way reversing valve and the second four-way reversing valve, which can effectively improve the integrated utilization of energy and maximize energy efficiency. The compressor drives the refrigerant to circulate in the refrigerant circulation pipeline. The compressor is connected to a first four-way reversing valve, a second heat exchanger, and a first heat exchange device. The refrigerant discharged from the compressor's exhaust port can pass sequentially through the first four-way reversing valve, the second heat exchanger, and the first heat exchange device, finally returning to the compressor's suction port. This allows either the first heat exchange device to heat + the second heat exchanger to heat, or the first heat exchange device to cool + the second heat exchanger to heat. The first heat exchange device includes an indoor heat exchanger, an outdoor heat exchanger, and a first four-way reversing valve. The first four-way reversing valve connects the compressor, the indoor heat exchanger, and the outdoor heat exchanger, and can switch the cooling / heating state of the first heat exchange device. The second heat exchange device includes a second heat exchanger and a second four-way reversing valve, and the operating state of the second heat exchanger can be changed by opening and closing the second four-way reversing valve. The third heat exchange device includes a third heat exchanger. The refrigerant discharged from the compressor can also first flow through the second heat exchanger for heat exchange, and then flow through the third heat exchanger for heat exchange, improving the energy efficiency.

[0007] In one embodiment of the present invention, the home appliance composite air conditioning system further includes: an indoor electronic expansion valve connected to an indoor heat exchanger; an outdoor electronic expansion valve disposed between the outdoor heat exchanger and the indoor electronic expansion valve; a second electronic expansion valve disposed between the second heat exchanger and the outdoor electronic expansion valve; a third electronic expansion valve disposed between the second electronic expansion valve and the third heat exchanger; a first solenoid valve disposed between a first four-way reversing valve and the outdoor heat exchanger; and a second solenoid valve disposed between a second four-way reversing valve and the outdoor heat exchanger.

[0008] Compared with existing technologies, the technical effects achieved by this technical solution are as follows: the indoor electronic expansion valve is connected to the indoor heat exchanger and is used to throttle the refrigerant flowing to the indoor heat exchanger; the outdoor electronic expansion valve is located between the outdoor heat exchanger and the indoor electronic expansion valve and is used to throttle the refrigerant flowing to the outdoor heat exchanger; the operating state of the second heat exchanger can be changed by changing the on / off state of the second electronic expansion valve; the operating state of the third heat exchanger can be changed by changing the on / off state of the third electronic expansion valve; the first solenoid valve is located between the first four-way reversing valve and the outdoor heat exchanger, and the second solenoid valve is located between the second four-way reversing valve and the outdoor heat exchanger, and is used to control the operating state of the first heat exchange device.

[0009] On the other hand, this embodiment provides a control method for a home appliance composite air conditioning system. When the first heat exchange device is in cooling mode, the first solenoid valve and the second solenoid valve are closed. The refrigerant discharged by the compressor flows sequentially through the second four-way reversing valve, the second heat exchanger, the second electronic expansion valve, the indoor electronic expansion valve, the indoor heat exchanger, and the first four-way reversing valve, and finally flows back to the suction port to achieve indoor space cooling.

[0010] Compared with existing technologies, the technical effects achieved by this solution are as follows: When the first heat exchanger is in cooling mode and the system receives a cooling demand, the first and second four-way reversing valves are set to the open state, as are the second, outdoor, and indoor electronic expansion valves. The first and second solenoid valves are set to the closed state, and the condensation heat is preferentially used for heating in the second heat exchanger. At this time, the high-temperature, high-pressure gaseous refrigerant discharged from the compressor enters the second heat exchanger through the second four-way reversing valve for heat exchange. The second heat exchanger can be regarded as a condenser. The liquid refrigerant condensed in the second heat exchanger passes through the second electronic expansion valve, and after being throttled by the indoor electronic expansion valve, it evaporates and cools in the indoor heat exchanger. The evaporated gaseous refrigerant passes through the first four-way reversing valve and finally returns to the compressor's suction port, realizing the heating cycle of the second heat exchanger and the cooling cycle of the indoor space.

[0011] In one embodiment of the present invention, the control method further includes: when the first heat exchange device is in a cooling mode, acquiring the temperature of the second heat exchanger; and controlling the opening and closing of the first solenoid valve according to the relationship between the temperature of the second heat exchanger and the second preset temperature.

[0012] Compared with existing technologies, the technical effects achieved by this solution are as follows: By acquiring the temperature of the second heat exchanger, the condensing capacity of the second heat exchanger can be determined based on its relationship with a second preset temperature. This allows for the control of the first solenoid valve's on / off state based on the second heat exchanger's condensing capacity, thus meeting different indoor cooling needs. By comparing the set second preset temperature with the second heat exchanger's temperature, the judgment of whether the second heat exchanger's temperature is too high is no longer a vague standard, making the judgment more accurate and scientific.

[0013] In one embodiment of the present invention, controlling the opening and closing of the first solenoid valve according to the relationship between the temperature of the second heat exchanger and the second preset temperature includes: when the temperature of the second heat exchanger is greater than the second preset temperature, the first solenoid valve is opened, and the refrigerant discharged by the compressor flows sequentially through the first four-way reversing valve, the first solenoid valve, the outdoor heat exchanger, the outdoor electronic expansion valve, the indoor electronic expansion valve, the indoor heat exchanger, and the first four-way reversing valve, and finally flows back to the suction port to improve the cooling effect; and / or when the temperature of the second heat exchanger is less than or equal to the second preset temperature, the first solenoid valve remains closed.

[0014] Compared with existing technologies, the technical effects achieved by this solution are as follows: Since the condensation heat is preferentially used for heating in the second heat exchanger, and then flows through the indoor heat exchanger for evaporation and cooling, a heating cycle of the second heat exchanger and a cooling cycle of the indoor space are achieved. Therefore, if the condensation effect of the second heat exchanger is insufficient, the cooling effect of the indoor heat exchanger will also deteriorate, thus requiring the condensation effect of the outdoor heat exchanger to further promote the cooling cycle. When the temperature of the second heat exchanger is too high (i.e., when the temperature of the second heat exchanger is greater than the second preset temperature), the condensation effect of the second heat exchanger deteriorates. At this time, the first solenoid valve is opened, and part of the high-temperature, high-pressure gaseous refrigerant discharged from the compressor enters the outdoor heat exchanger for condensation and heat exchange through the first four-way reversing valve and the first solenoid valve. After condensation, the liquid refrigerant condensed in both the second and indoor heat exchangers passes through the indoor electronic expansion valve for throttling and then evaporates and cools in the indoor heat exchanger, improving cooling efficiency and ensuring cooling effect. The dual condensers meet the indoor cooling demand and avoid affecting the cooling effect on the indoor side of the air conditioning system.

[0015] In one embodiment of the present invention, when the first heat exchange device is in heating mode, the indoor electronic expansion valve and the first solenoid valve are opened, and the refrigerant discharged by the compressor flows sequentially through the first four-way reversing valve, the indoor heat exchanger, the indoor electronic expansion valve, the outdoor electronic expansion valve, the outdoor heat exchanger, the first solenoid valve, and the first four-way reversing valve, and finally flows back to the suction port to achieve indoor space heating.

[0016] Compared with existing technologies, the technical effects achieved by this solution are as follows: When the first heat exchanger is in heating mode, the system receives a heating demand. At this time, the first and second four-way reversing valves are set to the open state, the outdoor and indoor electronic expansion valves are set to the open state, the first and second solenoid valves are set to the open state, and the second electronic expansion valve is set to the closed state. The condensation heat is preferentially used for heating of the first heat exchanger. At this time, the high-temperature and high-pressure gaseous refrigerant discharged from the compressor enters the indoor heat exchanger for heat exchange through the first four-way reversing valve. The indoor heat exchanger is a condenser. The liquid refrigerant condensed in the indoor heat exchanger enters the outdoor heat exchanger for evaporation through the indoor and outdoor electronic expansion valves. The evaporated refrigerant passes through the first solenoid valve and the first four-way reversing valve and finally returns to the compressor's suction port, realizing the heating cycle of the indoor space.

[0017] In one embodiment of the present invention, when the first heat exchange device is in heating mode, the second electronic expansion valve and the second solenoid valve are opened, and the refrigerant discharged by the compressor flows sequentially through the second four-way reversing valve, the second heat exchanger, the second electronic expansion valve, the outdoor electronic expansion valve, the outdoor heat exchanger, the second solenoid valve and the second four-way reversing valve, and finally returns to the suction port to realize the heating of the second heat exchanger.

[0018] Compared with existing technologies, the technical effects achieved by this solution are as follows: Since the condensation heat is preferentially used for heating in the first heat exchanger, the second electronic expansion valve is initially set to the closed state. When the heating effect of the first heat exchanger meets the requirements, that is, when the heating effect of the indoor space is sufficient, the second electronic expansion valve is opened. At this time, the high-temperature, high-pressure gaseous refrigerant discharged from the compressor not only enters the indoor heat exchanger for heat exchange through the first four-way reversing valve, but also enters the second heat exchanger for heat exchange through the second four-way reversing valve. The liquid refrigerant condensed in the indoor and second heat exchangers respectively merges and then enters the outdoor heat exchanger for evaporation after being throttled by the outdoor electronic expansion valve. The evaporated refrigerant can then return to the compressor's suction port through the first and / or second four-way reversing valves, completing the refrigerant cycle. This solves the problems of large temperature fluctuations and poor heating effect in the indoor space during defrosting, as well as insufficient hot water production when solar energy is insufficient.

[0019] In one embodiment of the present invention, when the second four-way reversing valve and the second electronic expansion valve are open, the third electronic expansion valve is opened, and the refrigerant condensed from the second heat exchanger flows sequentially through the third electronic expansion valve and the third heat exchanger, and finally flows back to the suction port to achieve cooling of the third heat exchanger.

[0020] Compared with existing technologies, the technical effects achieved by this technical solution are as follows: When the first heat exchanger is in cooling mode and / or heating mode, if the third heat exchanger needs to be cooled, with the second four-way reversing valve and the second electronic expansion valve open, the third electronic expansion valve is opened. The high-temperature and high-pressure gaseous refrigerant discharged from the compressor enters the second heat exchanger for heat exchange through the second four-way reversing valve. At this time, the second heat exchanger can be regarded as a condenser. The liquid refrigerant condensed in the second heat exchanger passes through the second electronic expansion valve and then through the third electronic expansion valve for throttling, thus cooling the third heat exchanger. At this time, the third heat exchanger can be regarded as an evaporator. The gaseous refrigerant evaporated in the third heat exchanger finally returns to the compressor's suction port, further realizing the cooling of the third heat exchanger.

[0021] In one embodiment of the present invention, the first heat exchange device is an air conditioner, the second heat exchanger is a hot water tank, and the third heat exchanger is a refrigerator.

[0022] Compared with existing technologies, the technical effects achieved by this solution are as follows: The first heat exchange device is an air conditioner, which includes an indoor heat exchanger, an outdoor heat exchanger, and a first four-way reversing valve. The cooling and heating functions of the air conditioner are exchanged and connected through the first four-way reversing valve. The second heat exchanger is a hot water tank, which can produce hot water through the exothermic reaction of the refrigerant for use in the kitchen, laundry, and bathing. The third heat exchanger is a refrigerator, where a portion of the refrigerant condensed in the hot water tank is diverted to the refrigerator for cooling. Furthermore, this invention allows the air conditioning system and the solar energy system to be linked and controlled according to the air conditioner's load requirements, simultaneously satisfying both domestic hot water needs and the air conditioner's cooling and heating needs.

[0023] By adopting the technical solution of the present invention, the following technical effects can be achieved:

[0024] (1) According to the home appliance composite air conditioning system of the present invention, the refrigerant is reasonably distributed (that is, the refrigerant flow path distribution control is reasonably achieved) by adjusting the first four-way reversing valve and the second four-way reversing valve, which can effectively improve the integrated utilization of energy and maximize energy efficiency;

[0025] (2) The present invention can link the air conditioning system and the solar energy system according to the load demand of the air conditioner, and simultaneously meet the domestic hot water and the cooling and heating effects of the air conditioner. Through the complementarity of solar energy and electric energy, the functions of heating and cooling, heating and hot water production are realized, the range of air conditioning is improved, and energy is saved at the same time.

[0026] (3) It solves the problems of large temperature fluctuations in the indoor space during defrosting and poor performance, as well as insufficient hot water production when solar energy is insufficient. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a home appliance-integrated air conditioning system provided in Embodiment 1 of the present invention, where the first heat exchange device is in cooling mode.

[0028] Figure 2 for Figure 1 The schematic diagram of the Zhongjiadian composite air conditioning system when the first heat exchanger is in heating mode.

[0029] Explanation of reference numerals in the attached figures:

[0030] 10-Compressor; 11-Indoor heat exchanger; 12-Outdoor heat exchanger; 13-First four-way reversing valve; 14-First solenoid valve; 15-Indoor electronic expansion valve; 16-Outdoor electronic expansion valve; 21-Second heat exchanger; 22-Second four-way reversing valve; 23-Second electronic expansion valve; 24-Second solenoid valve; 31-Third heat exchanger; 32-Third electronic expansion valve. Detailed Implementation

[0031] To make the above-mentioned objectives, features, and advantages of the present invention more apparent and understandable, the technical solutions in the embodiments of the present invention are clearly and completely described. 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.

[0032] Example 1

[0033] Embodiment 1 of the present invention provides a home appliance integrated air conditioning system, see [link to documentation]. Figure 1 and Figure 2 The home appliance-integrated air conditioning system includes: a first heat exchange device, a second heat exchange device, and a third heat exchange device; the first heat exchange device includes: a compressor 10, an indoor heat exchanger 11, an outdoor heat exchanger 12, and a first four-way reversing valve 13, the first four-way reversing valve 13 connecting the compressor 10, the indoor heat exchanger 11, and the outdoor heat exchanger 12, the compressor 10 driving the refrigerant to circulate in the refrigerant circulation pipeline; the second heat exchange device includes: a second heat exchanger 21 and a second four-way reversing valve 22, the second inlet of the second heat exchanger 21 being connected to the exhaust port of the compressor 10, and the second four-way reversing valve 22 connecting the exhaust port and the second inlet; the third heat exchange device includes: a third heat exchanger 31, the third heat exchanger 31 connecting the second outlet of the second heat exchanger 21 and the suction port of the compressor 10.

[0034] In a specific embodiment, the home appliance composite air conditioning system according to the present invention achieves reasonable refrigerant distribution (i.e., reasonable refrigerant flow path distribution control) through the adjustment of the first four-way reversing valve 13 and the second four-way reversing valve 22, which can effectively improve the integrated utilization of energy and maximize energy efficiency. The compressor 10 drives the refrigerant to circulate in the refrigerant circulation pipeline. The compressor 10 is connected to the first four-way reversing valve 13, the second heat exchanger 21, and the first heat exchange device. The refrigerant discharged from the exhaust port of the compressor 10 can sequentially pass through the first four-way reversing valve 13, the second heat exchanger 21, and the first heat exchange device, and finally return to the suction port of the compressor 10, realizing either heating by the first heat exchange device + heating by the second heat exchanger 21 or cooling by the first heat exchange device + heating by the second heat exchanger 21. The first heat exchange device further includes an indoor heat exchanger 11, an outdoor heat exchanger 12, and the first four-way reversing valve. Valve 13, the first four-way reversing valve 13 connects the compressor 10, the indoor heat exchanger 11 and the outdoor heat exchanger 12, and can switch the cooling / heating state of the first heat exchange device through the first four-way reversing valve 13; the second heat exchange device includes the second heat exchanger 21 and the second four-way reversing valve 22, and the operating state of the second heat exchanger 21 can be changed by opening and closing the second four-way reversing valve 22; the third heat exchange device includes the third heat exchanger 31, and the refrigerant discharged from the compressor 10 can also flow through the second heat exchanger 21 for heat exchange first, and then flow through the third heat exchanger 31 for heat exchange, thereby improving the effective utilization rate of energy.

[0035] Furthermore, the home appliance-integrated air conditioning system also includes: an indoor electronic expansion valve 15, an outdoor electronic expansion valve 16, a second electronic expansion valve 23, a third electronic expansion valve 32, a first solenoid valve 14, and a second solenoid valve 24. The indoor electronic expansion valve 15 is connected to the indoor heat exchanger 11; the outdoor electronic expansion valve 16 is located between the outdoor heat exchanger 12 and the indoor electronic expansion valve 15; the second electronic expansion valve 23 is located between the second heat exchanger 21 and the outdoor electronic expansion valve 16; the third electronic expansion valve 32 is located between the second electronic expansion valve 23 and the third heat exchanger 31; the first solenoid valve 14 is located between the first four-way reversing valve 13 and the outdoor heat exchanger 12; and the second solenoid valve 24 is located between the second four-way reversing valve 22 and the outdoor heat exchanger 12.

[0036] Specifically, the indoor electronic expansion valve 15 is connected to the indoor heat exchanger 11 and is used to throttle the refrigerant flowing to the indoor heat exchanger 11; the outdoor electronic expansion valve 16 is located between the outdoor heat exchanger 12 and the indoor electronic expansion valve 15 and is used to throttle the refrigerant flowing to the outdoor heat exchanger 12; the operating state of the second heat exchanger 21 can be changed by changing the on / off state of the second electronic expansion valve 23; the operating state of the third heat exchanger 31 can be changed by changing the on / off state of the third electronic expansion valve 32; the first solenoid valve 14 is located between the first four-way reversing valve 13 and the outdoor heat exchanger 12, and the second solenoid valve 24 is located between the second four-way reversing valve 22 and the outdoor heat exchanger 12, and is used to control the operating state of the first heat exchange device.

[0037]

Example 2

[0038] Embodiment 2 of the present invention provides a control method for a home appliance composite air conditioning system. The control method includes: when the first heat exchange device is in the cooling mode, the first solenoid valve 14 and the second solenoid valve 24 are closed, and the refrigerant discharged by the compressor 10 flows sequentially through the second four-way reversing valve 22, the second heat exchanger 21, the second electronic expansion valve 23, the indoor electronic expansion valve 15, the indoor heat exchanger 11 and the first four-way reversing valve 13, and finally flows back to the suction port to achieve indoor space cooling.

[0039] Specifically, when the first heat exchanger is in cooling mode, the system receives a cooling demand. At this time, the first four-way reversing valve 13 and the second four-way reversing valve 22 are set to the open state, the second electronic expansion valve 23, the outdoor electronic expansion valve 16, and the indoor electronic expansion valve 15 are set to the open state, and the first solenoid valve 14 and the second solenoid valve 24 are set to the closed state. The condensation heat is preferentially used for heating of the second heat exchanger 21. At this time, the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 10 enters the second heat exchanger 21 for heat exchange through the second four-way reversing valve 22. The second heat exchanger 21 can be regarded as a condenser. The liquid refrigerant condensed in the second heat exchanger 21 passes through the second electronic expansion valve 23, and after being throttled by the indoor electronic expansion valve 15, it evaporates and cools in the indoor heat exchanger 11. The evaporated gaseous refrigerant passes through the first four-way reversing valve 13 and finally returns to the suction port of the compressor 10, realizing the heating of the second heat exchanger 21 and the cooling of the indoor space.

[0040] Furthermore, the control method also includes: when the first heat exchanger is in cooling mode, acquiring the temperature of the second heat exchanger 21;

[0041] The opening and closing of the first solenoid valve 14 is controlled according to the relationship between the temperature of the second heat exchanger 21 and the second preset temperature.

[0042] Specifically, by acquiring the temperature of the second heat exchanger 21, the condensing capacity of the second heat exchanger 21 can be determined based on its relationship with a second preset temperature. This allows for the control of the opening and closing of the first solenoid valve 14 to meet different indoor cooling needs. The temperature of the second heat exchanger 21 is used to determine if its condensing effect is insufficient. When the temperature of the second heat exchanger 21 is too high, its condensing effect deteriorates, affecting the refrigeration cycle. By comparing the set second preset temperature with the temperature of the second heat exchanger 21, the judgment of whether the temperature of the second heat exchanger 21 is too high is no longer a vague standard, making the judgment more accurate and scientific.

[0043] Furthermore, based on the relationship between the temperature of the second heat exchanger 21 and the second preset temperature, the opening and closing of the first solenoid valve 14 is controlled, including:

[0044] When the temperature of the second heat exchanger 21 is higher than the second preset temperature, the first solenoid valve 14 is opened. The refrigerant discharged from the compressor 10 flows sequentially through the first four-way reversing valve 13, the first solenoid valve 14, the outdoor heat exchanger 12, the outdoor electronic expansion valve 16, the indoor electronic expansion valve 15, the indoor heat exchanger 11, and the first four-way reversing valve 13, and finally flows back to the suction port to improve the cooling effect; and / or

[0045] When the temperature of the second heat exchanger 21 is less than or equal to the second preset temperature, the first solenoid valve 14 remains closed.

[0046] Specifically, since the condensation heat is preferentially used for heating in the second heat exchanger 21, and then flows to the indoor heat exchanger 11 for evaporation and cooling, a heating cycle of the second heat exchanger 21 and a cooling cycle of the indoor space are achieved. Therefore, if the condensation effect of the second heat exchanger 21 is insufficient, the cooling effect of the indoor heat exchanger 11 will also deteriorate. Thus, the condensation effect of the outdoor heat exchanger 12 is needed to further promote the cooling cycle. When the temperature of the second heat exchanger 21 is too high (i.e., the temperature of the second heat exchanger 21 is greater than the second preset temperature), the condensation effect of the second heat exchanger 21 deteriorates. At this time, the first solenoid valve 14 is opened, and part of the high-temperature, high-pressure gaseous refrigerant discharged from the compressor 10 enters the outdoor heat exchanger 12 for condensation and heat exchange through the first four-way reversing valve 13 and the first solenoid valve 14. After condensation, the liquid refrigerant condensed in both the second and second heat exchangers 21 passes through the indoor electronic expansion valve 15 for throttling and then evaporates and cools in the indoor heat exchanger 11, improving cooling efficiency and ensuring the cooling effect. The dual condensers meet the indoor cooling demand and avoid affecting the cooling effect on the indoor side of the air conditioning system.

[0047] Preferably, the second preset temperature is 50°C.

[0048] Furthermore, when the first heat exchange device is in heating mode, the indoor electronic expansion valve 15 and the first solenoid valve 14 are opened. The refrigerant discharged by the compressor 10 flows sequentially through the first four-way reversing valve 13, the indoor heat exchanger 11, the indoor electronic expansion valve 15, the outdoor electronic expansion valve 16, the outdoor heat exchanger 12, the first solenoid valve 14, and the first four-way reversing valve 13, and finally flows back to the suction port to achieve indoor space heating.

[0049] Specifically, when the first heat exchanger is in heating mode, the system receives a heating demand. At this time, the first four-way reversing valve 13 and the second four-way reversing valve 22 are set to the open state, the outdoor electronic expansion valve 16 and the indoor electronic expansion valve 15 are set to the open state, the first solenoid valve 14 and the second solenoid valve 24 are set to the open state, and the second electronic expansion valve 23 is set to the closed state. The condensation heat is preferentially used for heating of the first heat exchanger. At this time, the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 10 enters the indoor heat exchanger 11 for heat exchange through the first four-way reversing valve 13. At this time, the indoor heat exchanger 11 is a condenser. The liquid refrigerant condensed in the indoor heat exchanger 11 enters the outdoor heat exchanger 12 for evaporation through the indoor electronic expansion valve 15 and the outdoor electronic expansion valve 16. The evaporated refrigerant passes through the first solenoid valve 14 and the first four-way reversing valve 13 and finally returns to the suction port of the compressor 10, realizing the heating cycle of the indoor space.

[0050] Furthermore, when the first heat exchanger is in heating mode, the second electronic expansion valve 23 and the second solenoid valve 24 are opened. The refrigerant discharged by the compressor 10 flows sequentially through the second four-way reversing valve 22, the second heat exchanger 21, the second electronic expansion valve 23, the outdoor electronic expansion valve 16, the outdoor heat exchanger 12, the second solenoid valve 24, and the second four-way reversing valve 22, and finally returns to the suction port to achieve heating of the second heat exchanger 21.

[0051] Specifically, since the condensation heat is preferentially used for heating in the first heat exchanger, the second electronic expansion valve 23 is initially set to the closed state. When the heating effect of the first heat exchanger meets the requirements, that is, when the heating effect of the indoor space is sufficient, the second electronic expansion valve 23 is opened. At this time, the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 10 not only enters the indoor heat exchanger 11 for heat exchange through the first four-way reversing valve 13, but also enters the second heat exchanger 21 for heat exchange through the second four-way reversing valve 22. After the liquid refrigerant condenses in the indoor heat exchanger 11 and the second heat exchanger 21 respectively, it merges and enters the outdoor heat exchanger 12 for evaporation after being throttled by the outdoor electronic expansion valve 16. The evaporated refrigerant can then return to the suction port of the compressor 10 through the first four-way reversing valve 13 and / or the second four-way reversing valve 22, completing the refrigerant cycle. This solves the problems of large temperature fluctuations in the indoor space during defrosting, poor heating effect, and insufficient hot water production when solar energy is insufficient.

[0052] Furthermore, with the second four-way reversing valve 22 and the second electronic expansion valve 23 open, the third electronic expansion valve 32 is opened, and the refrigerant condensed from the second heat exchanger 21 flows sequentially through the third electronic expansion valve 32 and the third heat exchanger 31, and finally flows back to the suction port to achieve cooling of the third heat exchanger 31.

[0053] Specifically, when the first heat exchanger is in cooling mode and / or heating mode, if the third heat exchanger 31 needs to be cooled, with the second four-way reversing valve 22 and the second electronic expansion valve 23 open, the third electronic expansion valve 32 is opened. The high-temperature and high-pressure gaseous refrigerant discharged from the compressor 10 enters the second heat exchanger 21 for heat exchange through the second four-way reversing valve 22. At this time, the second heat exchanger 21 can be regarded as a condenser. The liquid refrigerant after condensation in the second heat exchanger 21 passes through the second electronic expansion valve 23 and then through the third electronic expansion valve 32 for throttling, which cools the third heat exchanger 31. At this time, the third heat exchanger 31 can be regarded as an evaporator. The gaseous refrigerant after evaporation in the third heat exchanger 31 finally returns to the suction port of the compressor 10, further realizing the cooling of the third heat exchanger 31.

[0054] Furthermore, the first heat exchange device is an air conditioner, the second heat exchanger 21 is a hot water tank, and the third heat exchanger 31 is a refrigerator.

[0055] Specifically, the first heat exchange device is an air conditioner, which includes an indoor heat exchanger 11, an outdoor heat exchanger 12, and a first four-way reversing valve 13. The cooling and heating functions of the air conditioner are connected and exchanged through the first four-way reversing valve 13. The second heat exchanger 21 is a hot water tank, which can produce hot water through the heat release of the refrigerant for use in the kitchen, laundry, and bathing. The third heat exchanger 31 is a refrigerator, where a portion of the refrigerant condensed by the condenser in the hot water tank is diverted to the refrigerator for cooling.

[0056] The specific situation is as follows:

[0057] Scenario 1: Air conditioner cooling + hot water tank producing hot water + refrigerator cooling

[0058] In air conditioner cooling mode, when a cooling demand is received, the first solenoid valve 14 and the second solenoid valve 24 close, and the condensing heat is prioritized for hot water production. When hot water demand is low and the condensing effect is insufficient, the system automatically switches to the outdoor heat exchanger 12 by opening the first solenoid valve 14, achieving a dual-condenser effect and improving system energy efficiency. The specific control flow path is as follows: Figure 1 As shown:

[0059] The high-temperature and high-pressure gas discharged from the compressor 10 enters the hot water tank through the second four-way reversing valve 22 to produce hot water. At the same time, the refrigerant that has released heat and condensed flows through the second electronic expansion valve 23, which is in a fully open state, and then evaporates and cools in the indoor heat exchanger 11 after being throttled by the indoor electronic expansion valve 15. The evaporated gas returns to the compressor 10 through the first four-way reversing valve 13, completing the hot water and indoor space cooling cycle.

[0060] If the refrigerator needs to cool down, the third electronic expansion valve 32 opens, diverting a portion of the refrigerant condensed from the hot water tank through the third electronic expansion valve 32 to cool the refrigerator. The evaporated gas returns to the compressor 10, completing the hot water, indoor space cooling, and refrigerator cooling cycle.

[0061] When the water temperature in the hot water tank is too high (usually above 50℃), the condensation effect of the hot water tank deteriorates, which affects the cooling effect of the indoor air conditioner. This invention uses a double four-way valve design. When the water temperature is too high, the condensation effect deteriorates and the high pressure increases. At this time, by opening the first solenoid valve 14, part of the high-pressure refrigerant enters the outdoor heat exchanger 12 (outdoor unit condenser) for condensation. After condensation, the liquid refrigerant condensed in the hot water tank enters the indoor electronic expansion valve 15 for throttling and then evaporates and cools in the indoor heat exchanger 11 (indoor unit); thus ensuring the cooling effect.

[0062] Scenario 2: Air conditioner heating + hot water tank heating + refrigerator cooling

[0063] In air conditioner heating mode, when a heating demand is received, the condensed heat is prioritized for heating. Only when the air conditioner's heating effect is satisfactory is the second electronic expansion valve 23 gradually opened to produce hot water. The specific control flow path is as follows: Figure 2 As shown:

[0064] On the air conditioner side: The high-temperature and high-pressure gas discharged from the compressor 10 enters the indoor heat exchanger 11 for condensation heating and the hot water tank for heat exchange through the second four-way reversing valve 22 and the first four-way reversing valve 13, respectively. After condensation, the liquid refrigerant merges and enters the outdoor heat exchanger 12 for evaporation after being throttled by the outdoor electronic expansion valve 16. After evaporation, the refrigerant returns to the suction port of the compressor 10 through the second four-way reversing valve 22 and the first four-way reversing valve 13 to complete the refrigerant cycle.

[0065] If the refrigerator needs to cool down, the third electronic expansion valve 32 opens, diverting a portion of the refrigerant condensed from the hot water tank through the third electronic expansion valve 32 to cool the refrigerator. The evaporated gas returns to the compressor 10, completing the hot water, indoor space cooling, and refrigerator cooling cycle.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A home appliance compound air conditioning system, characterized by, The home appliance integrated air conditioning system includes: The first heat exchange device includes: a compressor (10), an indoor heat exchanger (11), an outdoor heat exchanger (12), and a first four-way reversing valve (13). The first four-way reversing valve (13) connects the compressor (10), the indoor heat exchanger (11), and the outdoor heat exchanger (12). The compressor (10) is used to drive the refrigerant to circulate in the refrigerant circulation pipeline. The second heat exchange device includes: a second heat exchanger (21) and a second four-way reversing valve (22), the second inlet of the second heat exchanger (21) is connected to the exhaust port of the compressor (10), and the second four-way reversing valve (22) is connected to the exhaust port and the second inlet; The third heat exchange device includes a third heat exchanger (31), which is connected to the second outlet of the second heat exchanger (21) and the suction port of the compressor (10). An indoor electronic expansion valve (15) is connected to the indoor heat exchanger (11); An outdoor electronic expansion valve (16) is provided between the outdoor heat exchanger (12) and the indoor electronic expansion valve (15); The second electronic expansion valve (23) is located between the second heat exchanger (21) and the outdoor electronic expansion valve (16); The third electronic expansion valve (32) is disposed between the second electronic expansion valve (23) and the third heat exchanger (31); The first solenoid valve (14) is located between the first four-way reversing valve (13) and the outdoor heat exchanger (12); The second solenoid valve (24) is located between the second four-way reversing valve (22) and the outdoor heat exchanger (12); When the first heat exchange device is in cooling mode, the temperature of the second heat exchanger (21) is obtained; The opening and closing of the first solenoid valve (14) is controlled according to the relationship between the temperature of the second heat exchanger and the second preset temperature. When the temperature of the second heat exchanger is greater than the second preset temperature, the first solenoid valve (14) is opened, and the refrigerant discharged by the compressor (10) flows sequentially through the first four-way reversing valve (13), the first solenoid valve (14), the outdoor heat exchanger (12), the outdoor electronic expansion valve (16), the indoor electronic expansion valve (15), the indoor heat exchanger (11) and the first four-way reversing valve (13), and finally flows back to the suction port to improve the cooling effect; When the temperature of the second heat exchanger is less than or equal to the second preset temperature, the first solenoid valve (14) remains closed.

2. A control method for a home appliance integrated air conditioning system, characterized in that, The control method for the home appliance integrated air conditioning system is used to control the home appliance integrated air conditioning system as described in claim 1, the control method comprising: When the first heat exchange device is in cooling mode, the first solenoid valve (14) and the second solenoid valve (24) are closed. The refrigerant discharged by the compressor (10) flows sequentially through the second four-way reversing valve (22), the second heat exchanger (21), the second electronic expansion valve (23), the indoor electronic expansion valve (15), the indoor heat exchanger (11) and the first four-way reversing valve (13), and finally flows back to the suction port to achieve indoor space cooling.

3. The control method for the home appliance composite air conditioning system according to claim 2, characterized in that, When the first heat exchange device is in heating mode, the indoor electronic expansion valve (15) and the first solenoid valve (14) are opened. The refrigerant discharged by the compressor (10) flows sequentially through the first four-way reversing valve (13), the indoor heat exchanger (11), the indoor electronic expansion valve (15), the outdoor electronic expansion valve (16), the outdoor heat exchanger (12), the first solenoid valve (14), and the first four-way reversing valve (13), and finally flows back to the suction port to achieve indoor space heating.

4. The control method for the home appliance composite air conditioning system according to claim 2, characterized in that, When the first heat exchange device is in heating mode, the second electronic expansion valve (23) and the second solenoid valve (24) are opened. The refrigerant discharged by the compressor (10) flows sequentially through the second four-way reversing valve (22), the second heat exchanger (21), the second electronic expansion valve (23), the outdoor electronic expansion valve (16), the outdoor heat exchanger (12), the second solenoid valve (24), and the second four-way reversing valve (22), and finally returns to the suction port to realize the heating of the second heat exchanger (21).

5. The control method for the household appliance composite air conditioning system according to any one of claims 2-4, characterized in that, With the second four-way reversing valve (22) and the second electronic expansion valve (23) open, the third electronic expansion valve (32) is opened, and the refrigerant condensed from the second heat exchanger (21) flows sequentially through the third electronic expansion valve (32) and the third heat exchanger (31), and finally flows back to the suction port to achieve the cooling of the third heat exchanger (31).

6. The control method for the home appliance composite air conditioning system according to claim 2, characterized in that, The first heat exchange device is an air conditioner, the second heat exchanger (21) is a hot water tank, and the third heat exchanger (31) is a refrigerator.

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