Air conditioning system

Abstract

The present application discloses an air conditioning system. The air conditioning system includes a compressor, a heat storage module, an indoor heat exchanger, a throttling device, a bypass stop valve, a capillary tube and an outdoor heat exchanger; the exhaust port of the compressor is connected to the heat storage module, the indoor heat exchanger is connected to the outdoor heat exchanger through the throttling device, and the bypass stop valve is connected to the outdoor heat exchanger and the air inlet of the compressor; in the defrost mode, the bypass stop valve is controlled to be closed, and the heat storage module is controlled to be connected to the indoor heat exchanger, the outdoor heat exchanger is connected to the heat storage module through the capillary tube, and the heat storage module is controlled to be connected to the air inlet of the compressor. In the above manner, the air conditioning system of the present application can use the heat storage module as an indirect heat regenerator in the defrost mode, thereby reducing the load of the outdoor heat exchanger, increasing the evaporation temperature of the outdoor heat exchanger, delaying the frosting of the outdoor heat exchanger, and extending the high-capacity continuous heating time.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular to an air conditioning system. Background Art

[0002] After the air conditioner has been running for a period of time under low temperature conditions, the outdoor heat exchanger will frost, causing the system's heating capacity to decline. In severe cases of frost, the system may even be unable to heat. The main solution for existing air conditioners is reverse defrosting, which restores the air conditioner's efficient heating capacity. However, the temperature of the refrigerant flowing through the indoor heat exchanger during reverse defrosting is relatively low, which will absorb heat from the room, lower the room temperature, and also reduce the comfort of the room. In addition, in low temperature environments, the air conditioning system needs to enter defrost control after a short period of heating operation, which reduces the energy efficiency of the air conditioning system, shortens the high-efficiency operation time of the heating condition, and reduces the working performance of the air conditioning system. How to achieve continuous heating without stopping the air conditioner in a low temperature environment, improve user comfort, and operate the air conditioner with high energy efficiency is a key technical direction for breakthroughs in the industry. Summary of the invention

[0003] The present application proposes an air conditioning system, aiming to solve the above-mentioned problems.

[0004] In order to solve the above technical problems, a technical solution adopted by the present application is: to provide an air conditioning system. The air conditioning system includes a compressor, a heat storage module, an indoor heat exchanger, a throttling device, a bypass stop valve, a capillary tube and an outdoor heat exchanger; the exhaust port of the compressor is connected to the heat storage module, the indoor heat exchanger is connected to the outdoor heat exchanger through the throttling device, and the bypass stop valve is connected to the outdoor heat exchanger and the air inlet of the compressor; in the defrost mode, the bypass stop valve is controlled to be closed, and the heat storage module is controlled to be connected to the indoor heat exchanger, the outdoor heat exchanger is connected to the heat storage module through the capillary tube, and the heat storage module is controlled to be connected to the air inlet of the compressor; wherein, in the defrost mode, the refrigerant output from the exhaust port of the compressor flows through the heat storage module into the indoor heat exchanger to continuously provide heat to the room; the throttling device is fully opened, the refrigerant flows out from the indoor heat exchanger, flows through the throttling device and then enters the outdoor heat exchanger for defrosting, and the evaporated refrigerant flows through the capillary tube and flows through the heat storage module to absorb heat and vaporize, and finally enters the air inlet of the compressor to complete the defrost cycle and repeat the cycle.

[0005] Among them, the air-conditioning system also includes a four-way reversing valve; the four-way reversing valve is provided with a first pipe port, a second pipe port, a third pipe port and a fourth pipe port; the heat storage module is connected to the first pipe port, the indoor heat exchanger is connected to the second pipe port, the bypass stop valve is connected to the outdoor heat exchanger and the third pipe port, the heat storage module is connected to the third pipe port, and the fourth pipe port is connected to the air inlet of the compressor.

[0006] Among them, in the heating mode, the first pipe port is controlled to be connected with the second pipe port, the third pipe port is controlled to be connected with the fourth pipe port, and the bypass stop valve is controlled to be connected; when switching from the heating mode to the defrost mode, the connection direction of the four-way reversing valve is kept unchanged, and the bypass stop valve is controlled to be closed; in the cooling mode, the four-way reversing valve is controlled, the first pipe port is controlled to be connected with the third pipe port, the second pipe port is controlled to be connected with the fourth pipe port, and the bypass stop valve is controlled to be connected.

[0007] Among them, the air-conditioning system also includes a first three-way valve, which is provided with a first connection port, a second connection port and a third connection port; the first connection port is connected to the bypass stop valve and the capillary tube, the second connection port is connected to the heat storage module, and the third connection port is connected to the air inlet of the compressor.

[0008] Among them, the heating mode includes a pure heating mode and a heating frost suppression mode; in the pure heating mode, the first connection port is controlled to be connected to the third connection port; in the heating frost suppression mode, the defrost mode and the cooling mode, the first connection port is controlled to be connected to the second connection port.

[0009] Among them, the air-conditioning system also includes a second three-way valve, which is provided with a fourth connection port, a fifth connection port and a sixth connection port; the outdoor heat exchanger is connected to the fourth connection port through a capillary tube, and the outdoor heat exchanger is also connected to the fourth connection port through a bypass stop valve, the fifth connection port is connected to the heat storage module, and the sixth connection port is connected to the air inlet of the compressor.

[0010] Among them, the heating mode includes a pure heating mode and a heating frost suppression mode; in the pure heating mode, the fourth connection port and the sixth connection port are controlled to be connected and the bypass stop valve is controlled to be connected; in the heating frost suppression mode, the fourth connection port and the fifth connection port are controlled to be connected and the bypass stop valve is controlled to be connected; when switching from the heating frost suppression mode to the defrost mode, the connection method of the second three-way valve is kept unchanged, and the bypass stop valve is controlled to be closed.

[0011] Among them, the air-conditioning system also includes a shunt branch, one end of the shunt branch is connected to the heat storage module, and the other end of the shunt branch is connected to the throttling device; in heating mode and cooling mode, the shunt branch is closed; in defrost mode, the shunt branch is turned on and the opening of the shunt branch is adjusted based on the defrost demand.

[0012] Among them, the shunt branch includes an adjustable solenoid valve. In the heating mode and the cooling mode, the adjustable solenoid valve is completely closed; in the defrost mode, the adjustable solenoid valve adjusts its own opening based on the defrost demand.

[0013] Among them, in the heating mode and the cooling mode, the throttling device is set to be throttled, and in the defrosting mode, the throttling device is set to be fully open.

[0014] The beneficial effects of the present application are as follows: different from the prior art, the air-conditioning system of the present application includes a compressor, a heat storage module, an indoor heat exchanger, a throttling device, a bypass stop valve, a capillary tube and an outdoor heat exchanger, the exhaust port of the compressor is connected to the heat storage module, the indoor heat exchanger is connected to the outdoor heat exchanger through the throttling device, and the bypass stop valve is connected to the outdoor heat exchanger and the air inlet of the compressor; in the defrost mode, the bypass stop valve is controlled to be closed, and the heat storage module is controlled to be connected to the indoor heat exchanger, the outdoor heat exchanger is connected to the heat storage module through the capillary tube, and the heat storage module is controlled to be connected to the air inlet of the compressor. Through the above method, the air-conditioning system of the present application can convert the refrigerant output by the outdoor heat exchanger into low-temperature and low-pressure refrigerant through capillary throttling in the defrost mode, and flow through the heat storage module to absorb heat and vaporize into low-temperature and low-pressure gas, and then enter the air inlet of the compressor. In this process, the present application uses the heat storage module as an indirect heat regenerator to heat the refrigerant, thereby reducing the load of the outdoor heat exchanger, increasing the evaporation temperature of the outdoor heat exchanger, delaying the frosting of the outdoor heat exchanger, and extending the high-capacity continuous heating time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings herein are incorporated into the specification and constitute a part of the specification. These drawings illustrate embodiments consistent with the present application and are used together with the specification to illustrate the technical solution of the present application.

[0016] Figure 1 is a structural schematic diagram of the first embodiment of the air conditioning system of the present application;

[0017] Figure 2 is a structural schematic diagram of a second embodiment of the air conditioning system of the present application;

[0018] Figure 3 yes Figure 2 Schematic diagram of the refrigerant cycle in the heating mode of the air conditioning system;

[0019] Figure 4 yes Figure 2 Schematic diagram of refrigerant cycle in defrost mode of air conditioning system;

[0020] Figure 5 yes Figure 2 Schematic diagram of the refrigerant cycle in the cooling mode of the air conditioning system;

[0021] Figure 6 is a structural schematic diagram of a third embodiment of the air conditioning system of the present application;

[0022] Figure 7 This application Figure 6 Schematic diagram of the refrigerant cycle in the pure heating mode of the air conditioning system;

[0023] Figure 8 This application Figure 6 Schematic diagram of refrigerant cycle in heating and frost suppression mode of air conditioning system;

[0024] Fig. 9 This application Figure 6 Schematic diagram of refrigerant cycle in defrost mode of air conditioning system;

[0025] Fig.10 This application Figure 6 Schematic diagram of the refrigerant cycle in the cooling mode of the air conditioning system;

[0026] Fig.11 is a structural schematic diagram of a fourth embodiment of the air conditioning system of the present application;

[0027] Fig.12 yes Fig.11 Schematic diagram of the refrigerant cycle in the pure heating mode of the air conditioning system;

[0028] Fig.13 yes Fig.11 Schematic diagram of refrigerant cycle in heating and frost suppression mode of air conditioning system;

[0029] Fig.14 yes Fig.11 Schematic diagram of refrigerant cycle in defrost mode of air conditioning system;

[0030] Fig.15 It is a structural schematic diagram of the fifth embodiment of the air-conditioning system of the present application. DETAILED DESCRIPTION

[0031] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0033] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0034] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0035] After the air conditioner has been running for a period of time under low temperature conditions, the outdoor heat exchanger will frost, causing the system's heating capacity to decline. In severe cases of frost, the system may even be unable to heat. The main solution for existing air conditioners is reverse defrosting, which restores the air conditioner's efficient heating capacity. However, the temperature of the refrigerant flowing through the indoor heat exchanger during reverse defrosting is relatively low, which will absorb heat from the room, lower the room temperature, and also reduce the comfort of the room. In addition, in low temperature environments, the air conditioning system needs to enter defrost control after a short period of heating operation, which reduces the energy efficiency of the air conditioning system, shortens the high-efficiency operation time of the heating condition, and reduces the working performance of the air conditioning system. How to achieve continuous heating without stopping the air conditioner in a low temperature environment, improve user comfort, and operate the air conditioner with high energy efficiency is a key technical direction for breakthroughs in the industry.

[0036] In order to solve the above problems, the present application first proposes an air conditioning system, see Figure 1 , Figure 1 Schematic diagram of the structure of the first embodiment of the air conditioning system of the present application. Figure 1 As shown, the air conditioning system 100 of the present embodiment includes a compressor 10 , a heat storage module 20 , an indoor heat exchanger 30 , a throttling device 40 , a bypass stop valve 90 , a capillary tube 50 and an outdoor heat exchanger 60 .

[0037] like Figure 1 As shown, the exhaust port of the compressor 10 is connected to the heat storage module 20, the indoor heat exchanger 30 is connected to the outdoor heat exchanger 60 through the throttling device 40, and the bypass stop valve 90 is connected to the outdoor heat exchanger 60 and the air inlet of the compressor 10; in this embodiment, in the defrost mode, the controller (not shown) of the air-conditioning system 100 controls the bypass stop valve 90 to be shut off, and controls the heat storage module 20 to be connected to the indoor heat exchanger 30, the outdoor heat exchanger 60 is connected to the heat storage module 20 through the capillary 50, and controls the heat storage module 20 to be connected to the air inlet of the compressor 10.

[0038] Among them, in the defrost mode, the refrigerant output from the exhaust port of the compressor 10 flows through the heat storage module 20 and enters the indoor heat exchanger 30 to continuously provide heat to the indoor room; the throttling device 40 is fully opened, and the refrigerant flows out from the indoor heat exchanger 30, flows through the throttling device 40 and enters the outdoor heat exchanger 60 for defrosting, and the evaporated refrigerant flows through the capillary 50 and flows through the heat storage module 20 to absorb heat and vaporize, and finally enters the air inlet of the compressor 10 to complete the defrost cycle and repeat the cycle.

[0039] Among them, compressing refrigerant is the main purpose of the compressor 10. The compressor 10 absorbs low-temperature and low-pressure refrigerant gas and compresses it into high-temperature and high-pressure gas to achieve the purpose of regulating temperature; the throttling device 40 is used to adjust the flow of the refrigerant in the air-conditioning system 100 to optimize the circulation; the capillary tube 50 plays a role of pressure reduction and throttling in the air-conditioning system 100, which can prevent the normal temperature and high-pressure refrigerant from directly entering the compressor 10 through the heat storage module 20, thereby reducing the pressure in the compressor 10.

[0040] In this embodiment, if Figure 1 As shown, the air conditioning system 100 further includes a fan 70 , and in the defrost mode, the fan 70 can be selectively turned off.

[0041] Different from the prior art, the air-conditioning system 100 of the present application can, in the defrost mode, convert the refrigerant output by the defrosting of the outdoor heat exchanger 60 into a low-temperature and low-pressure refrigerant through the throttling of the capillary 50, and flow through the heat storage module 20 to absorb heat and vaporize into a low-temperature and low-pressure gas, and then enter the air inlet of the compressor 10. During this process, the air-conditioning system 100 uses the heat storage module 20 as an indirect heat regenerator to heat the refrigerant, thereby reducing the load of the outdoor heat exchanger 60, increasing the evaporation temperature of the outdoor heat exchanger 60, delaying the frosting of the outdoor heat exchanger 60, and extending the high-capacity continuous heating time.

[0042] Optionally, based on Figure 1 For an example, see Figure 2 , Figure 2 Schematic diagram of the structure of the second embodiment of the air conditioning system of the present application. Figure 2 As shown, the air conditioning system 100 of this embodiment includes not only a compressor 10 , a heat storage module 20 , an indoor heat exchanger 30 , a throttling device 40 , a bypass stop valve 90 , a capillary tube 50 and an outdoor heat exchanger 60 , but also a four-way reversing valve 80 .

[0043] like Figure 2 As shown, the exhaust port of the compressor 10 is connected to the heat storage module 20, and the indoor heat exchanger 30 is connected to the outdoor heat exchanger 60 through the throttling device 40; the heat storage module 20 is connected to the indoor heat exchanger 30 through the four-way reversing valve 80, and the outdoor heat exchanger 60 is connected to the heat storage module 20 through the capillary tube 50; the heat storage module 20 is also connected to the air inlet of the compressor 10 through the four-way reversing valve 80.

[0044] Among them, the four-way reversing valve 80 is provided with a first pipe port A1, a second pipe port A2, a third pipe port A3 and a fourth pipe port A4; the heat storage module 20 is connected to the first pipe port A1, the indoor heat exchanger 30 is connected to the second pipe port A2, the bypass stop valve 90 is connected to the outdoor heat exchanger 60 and the third pipe port A3, the heat storage module 20 is also connected to the third pipe port A3, and the fourth pipe port A4 is connected to the air inlet of the compressor 10.

[0045] See also Figure 3 , Figure 3 yes Figure 2 Schematic diagram of the refrigerant cycle in the heating mode of the air conditioning system. Figure 3 As shown, in Figure 2 In the heating mode of the air conditioning system 100 shown, the controller (not shown) of the air conditioning system 100 controls the first pipe port A1 to be connected to the second pipe port A2, the third pipe port A3 to be connected to the fourth pipe port A4 and controls the bypass stop valve 90 to be connected.

[0046] At this time, if Figure 3 As shown, when the air conditioning system 100 works in the heating mode, the high-temperature and high-pressure gas discharged from the exhaust port of the compressor 10 first passes through the heat storage module 20 to charge the heat storage module 20, and then flows into the indoor heat exchanger 30 through the first pipe port A1 and the second pipe port A2 of the four-way reversing valve 80 to supply heat to the indoor room. The refrigerant flows out of the indoor heat exchanger 30 and is throttled by the throttling device 40 and then flows through the outdoor heat exchanger 60. The refrigerant absorbs outdoor heat and evaporates. A part of the low-temperature and low-pressure refrigerant passes through the bypass stop valve 90 and the third pipe port A3 and the fourth pipe port A4 of the four-way reversing valve 80 and enters the air inlet of the compressor 10; another part of the low-temperature and low-pressure refrigerant passes through the capillary 50, the heat storage module 20 and the third pipe port A3 and the fourth pipe port A4 and enters the air inlet of the compressor 10, completing the heating cycle and repeating the cycle.

[0047] See also Figure 4 , Figure 4 yes Figure 2 Schematic diagram of the refrigerant cycle in the defrost mode of the air conditioning system. Figure 4 As shown, if the air conditioning system 100 needs to switch from the heating mode to the defrosting mode, the controller can keep the connection direction of the four-way reversing valve unchanged and control the bypass stop valve 90 to be closed ( Figure 4 The dotted line in the figure indicates that the branch is disconnected here).

[0048] At this time, if Figure 4 As shown, when the air-conditioning system 100 is operating in the defrost mode, the high-temperature and high-pressure gas discharged from the exhaust port of the compressor 10 first passes through the heat storage module 20, and then flows into the indoor heat exchanger 30 through the first pipe port A1 and the second pipe port A2 of the four-way reversing valve 80 to continuously provide heat to the indoor room. At this time, the throttling device 40 is fully opened, and the higher temperature refrigerant (refrigerant waste heat) enters the outdoor heat exchanger 60 for defrosting; in the defrost mode, since the bypass stop valve 90 is closed, the refrigerant is only throttled through the capillary 50 to become a low-temperature and low-pressure refrigerant, and then flows through the heat storage module 20 again and absorbs heat to vaporize into a low-temperature and low-pressure gas, and finally enters the air inlet of the compressor 10 through the third pipe port A3 and the fourth pipe port A4 of the four-way reversing valve 80, thereby completing the defrost cycle and repeating the cycle.

[0049] When switching from the heating mode to the defrost mode, the four-way reversing valve 80 does not need to be reversed, and the refrigerant still flows in the forward direction to achieve defrosting without stopping the machine, thereby reducing indoor temperature fluctuations; and the air-conditioning system 100 of the present application can, in the defrost mode, throttle the refrigerant output by the outdoor heat exchanger 60 through the capillary 50 to become a low-temperature and low-pressure refrigerant, and flow through the heat storage module 20 to absorb heat and vaporize into a low-temperature and low-pressure gas, and then enter the air inlet of the compressor 10 through the third pipe port A3 and the fourth pipe port A4 of the four-way reversing valve 80. In this process, the air-conditioning system 100 uses the heat storage module 20 as an indirect heat regenerator to heat the refrigerant, which can reduce the load of the outdoor heat exchanger 60, increase the evaporation temperature of the outdoor heat exchanger 60, delay the frosting of the outdoor heat exchanger 60, and extend the high-capacity continuous heating time; in addition, the air-conditioning system 100 can also provide indoor heating at the same time in the defrost mode to reduce indoor temperature fluctuations and improve comfort.

[0050] See also Figure 5 , Figure 5 yes Figure 2 Schematic diagram of the refrigerant cycle in the cooling mode of the air conditioning system. Figure 5 As shown, if the air-conditioning system 100 is in cooling mode, the controller needs to control the four-way reversing valve 80 to reverse, and at this time control the first pipe port A1 to be connected with the third pipe port A3, the second pipe port A2 to be connected with the fourth pipe port A4, and control the bypass stop valve 90 to be connected.

[0051] At this time, if Figure 5 As shown, when the air-conditioning system 100 works in the cooling mode, the high-temperature and high-pressure refrigerant discharged from the exhaust port of the compressor 10 flows through the heat storage module 20 for the first time, and passes through the first pipe port A1 and the third pipe port A3. After a part of the high-temperature and high-pressure refrigerant flows out from the third pipe port A3, it flows through the heat storage module 20 and the capillary tube 50 for the second time to enter the outdoor heat exchanger 60 to release heat, and another part of the high-temperature and high-pressure refrigerant enters the outdoor heat exchanger 60 through the bypass stop valve 90 to release heat; after the high-temperature and high-pressure refrigerant releases heat, it forms a low-temperature and low-pressure refrigerant that flows out of the outdoor heat exchanger 60, flows through the throttling device 40 for throttling, and flows through the indoor heat exchanger 30 to absorb heat indoors. The refrigerant after absorbing heat flows through the second pipe port A2 and the fourth pipe port A4 back to the air inlet of the compressor 10 to complete the refrigeration cycle and repeat the cycle.

[0052] Optionally, based on Figure 2 For an example, see Figure 6 , Figure 6 Schematic diagram of the structure of the third embodiment of the air conditioning system of the present application. Figure 6 As shown, the air conditioning system 100 of this embodiment includes not only a compressor 10, a heat storage module 20, an indoor heat exchanger 30, a throttling device 40, a capillary tube 50, an outdoor heat exchanger 60, a four-way reversing valve 80 and a bypass stop valve 90, but also a first three-way valve 91.

[0053] like Figure 6 As shown, the four-way reversing valve 80 is provided with a first pipe port A1, a second pipe port A2, a third pipe port A3 and a fourth pipe port A4, and the first three-way valve 91 is provided with a first connection port B1, a second connection port B2 and a third connection port B3; the exhaust port of the compressor 10 is connected to the heat storage module 20, the heat storage module 20 is connected to the first pipe port A1, the indoor heat exchanger 30 is connected to the second pipe port A2, and the indoor heat exchanger 30 is connected to the outdoor heat exchanger 60 through the throttling device 40; the outdoor heat exchanger 60 is connected to the first connection port B1 through the capillary tube 50 and the bypass stop valve 90; the second connection port B2 is connected to the heat storage module 20, and the third connection port B3 is connected to the air inlet of the compressor 10; in addition, the heat storage module 20 is also connected to the third pipe port A3, and the fourth pipe port A4 is connected to the air inlet of the compressor 10.

[0054] In this embodiment, Figure 6 The heating modes of the air-conditioning system include pure heating mode and heating and anti-frost mode.

[0055] See also Figure 7 , Figure 7 This application Figure 6 Schematic diagram of the refrigerant cycle in the pure heating mode of the air conditioning system. Figure 6 In the pure heating mode of the air conditioning system, the controller (not shown) controls the first pipe port A1 to be connected with the second pipe port A2, the third pipe port A3 to be connected with the fourth pipe port A4, and controls the bypass stop valve 90 to be connected. At this time, the controller also needs to control the first connection port B1 of the first three-way valve 91 to be connected with the third connection port B3 ( Figure 7 The dotted line in the figure indicates that the branch is disconnected.)

[0056] At this time, if Figure 7 As shown, when the air-conditioning system 100 works in pure heating mode, the high-temperature and high-pressure gas discharged from the exhaust port of the compressor 10 first passes through the heat storage module 20 to charge the heat storage module 20, and then flows into the indoor heat exchanger 30 through the first pipe port A1 and the second pipe port A2 of the four-way reversing valve 80 to supply heat to the indoor room. The refrigerant flows out of the indoor heat exchanger 30 and is throttled by the throttling device 40 and then flows through the outdoor heat exchanger 60. The refrigerant absorbs outdoor heat and evaporates. The low-temperature and low-pressure refrigerant passes through the bypass stop valve 90 and the capillary tube 50 respectively, and then passes through the first connection port B1 and the third connection port B3 of the first three-way valve 91 to enter the air inlet of the compressor 10, completing the pure heating cycle and repeating the cycle.

[0057] See also Figure 8 , Figure 8 This application Figure 6 Schematic diagram of the refrigerant cycle in the heating and frost suppression mode of the air conditioning system. Figure 6In the heating and frost suppression mode of the air conditioning system, the controller (not shown) controls the first pipe port A1 to be connected with the second pipe port A2, the third pipe port A3 to be connected with the fourth pipe port A4, and controls the bypass stop valve 90 to be connected. At this time, the controller needs to control the first connection port B1 of the first three-way valve 91 to be connected with the second connection port B2 ( Figure 8 The dotted line in the figure indicates that the branch is disconnected.)

[0058] At this time, if Figure 8 As shown, when the air-conditioning system 100 works in the heating and frost suppression mode, the high-temperature and high-pressure gas discharged from the exhaust port of the compressor 10 first passes through the heat storage module 20 to charge the heat storage module 20, and then flows into the indoor heat exchanger 30 through the first pipe port A1 and the second pipe port A2 of the four-way reversing valve 80 to supply heat to the indoor room. After the refrigerant flows out of the indoor heat exchanger 30, it is throttled by the throttling device 40 and then flows through the outdoor heat exchanger 60. The refrigerant absorbs outdoor heat and evaporates. The low-temperature and low-pressure refrigerant passes through the bypass stop valve 90 and the capillary tube 50 respectively, and then enters the heat storage module 20 through the first connecting port B1 and the second connecting port B2 of the first three-way valve 91 to absorb heat and vaporize to form low-temperature and low-pressure gas. The low-temperature and low-pressure gas then passes through the third pipe port A3 and the fourth pipe port A4 to enter the air inlet of the compressor 10, thereby completing the heating and frost suppression cycle and repeating the cycle.

[0059] In the heating and frost suppression mode of the air-conditioning system 100 of the present embodiment, as described above, the refrigerant absorbs outdoor heat through the outdoor heat exchanger 60 and evaporates to form a low-temperature and low-pressure refrigerant. At this time, it passes through the bypass stop valve 90 and the capillary tube 50 and then enters the heat storage module 20 through the first connection port B1 and the second connection port B2 of the first three-way valve 91 to absorb heat and vaporize to form a low-temperature and low-pressure gas. The low-temperature and low-pressure gas then passes through the third pipe port A3 and the fourth pipe port A4 to enter the air inlet of the compressor 10. In this process, the heat storage module 20 also acts as an indirect heat regenerator to heat the refrigerant passing through the outdoor heat exchanger 60, so as to reduce the load of the outdoor heat exchanger 60, increase the evaporation temperature of the outdoor heat exchanger 60, delay the frost of the outdoor heat exchanger 60, and extend the high-capacity continuous heating time.

[0060] See also Fig. 9 , Fig. 9 This application Figure 6 Schematic diagram of the refrigerant cycle in the defrost mode of the air conditioning system. Figure 6 In the defrost mode of the air conditioning system, the controller (not shown) controls the first pipe port A1 to be connected with the second pipe port A2, the third pipe port A3 to be connected with the fourth pipe port A4, and controls the bypass stop valve 90 to be closed. At this time, the controller also needs to control the first connection port B1 of the first three-way valve 91 to be connected with the second connection port B2 ( Fig. 9 The dotted line in the figure indicates that the branch is disconnected.)

[0061] At this time, if Fig. 9 As shown, when the air-conditioning system 100 is operating in the defrost mode, the high-temperature and high-pressure gas discharged from the exhaust port of the compressor 10 first flows through the heat storage module 20, and then flows into the indoor heat exchanger 30 through the first pipe port A1 and the second pipe port A2 of the four-way reversing valve 80 to continuously provide heat to the indoor room. At this time, the throttling device 40 is fully opened, and the higher temperature refrigerant (refrigerant waste heat) enters the outdoor heat exchanger 60 for defrosting; in the defrost mode, since the bypass stop valve 90 is closed, the refrigerant is only throttled through the capillary 50 to become a low-temperature and low-pressure refrigerant, flows through the first connection port B1 and the second connection port B2 of the first three-way valve 91 and enters the heat storage module 20 to absorb heat and vaporize, becoming a low-temperature and low-pressure gas, and enters the air inlet of the compressor 10 through the third pipe port A3 and the fourth pipe port A4 of the four-way reversing valve 80, thereby completing the defrost cycle and repeating the cycle.

[0062] In this embodiment, when switching from the heating frost suppression mode to the defrost mode, the four-way reversing valve 80 and the first three-way valve 91 do not need to be reversed, and it is only necessary to close the bypass stop valve 90. At this time, the refrigerant still flows in the forward direction to achieve non-stop defrosting and reduce indoor temperature fluctuations.

[0063] In this defrost mode, the refrigerant is also throttled by the capillary tube 50 to become a low-temperature and low-pressure refrigerant, and flows through the first connection port B1 and the second connection port B2 of the first three-way valve 91 to enter the heat storage module 20 to absorb heat and vaporize, becoming a low-temperature and low-pressure gas, and finally enters the air inlet of the compressor 10 through the third pipe port A3 and the fourth pipe port A4 of the four-way reversing valve 80. In this process, the heat storage module 20 also serves as an indirect heat recuperator to heat the refrigerant passing through the outdoor heat exchanger 60, so as to reduce the load of the outdoor heat exchanger 60, increase the evaporation temperature of the outdoor heat exchanger 60, delay the frosting of the outdoor heat exchanger 60, and extend the high-capacity continuous heating time.

[0064] See also Fig.10 , Fig.10 This application Figure 6 Schematic diagram of the refrigerant cycle in the cooling mode of the air conditioning system. Figure 6 In the cooling mode of the air-conditioning system, the controller (not shown) controls the four-way reversing valve 80 to reverse, the first pipe port A1 is connected to the third pipe port A3, the second pipe port A2 is connected to the fourth pipe port A4, and the bypass stop valve 90 is controlled to be connected. At this time, the controller also needs to control the first connection port B1 of the first three-way valve 91 to be connected to the second connection port B2 ( Fig.10 The dotted line in the figure indicates that the branch is disconnected.)

[0065] At this time, if Fig.10As shown, when the air-conditioning system 100 works in the cooling mode, the high-temperature and high-pressure refrigerant discharged from the exhaust port of the compressor 10 flows through the heat storage module 20, the first pipe port A1 and the third pipe port A3 for the first time. After flowing out from the third pipe port A3, the high-temperature and high-pressure refrigerant flows through the heat storage module 20 for the second time, and after flowing out from the heat storage module 20, it passes through the second connecting port B2 and the first connecting port B1, and enters the outdoor heat exchanger 60 through the capillary tube 50 and the bypass stop valve 90 respectively to release heat; after the high-temperature and high-pressure refrigerant releases heat, it forms a low-temperature and low-pressure refrigerant that flows out of the outdoor heat exchanger 60, flows through the throttling device 40 for throttling, and flows through the indoor heat exchanger 30 to absorb heat to the indoor room. The refrigerant after absorbing heat flows through the second pipe port A2 and the fourth pipe port A4 back to the air inlet of the compressor 10 to complete the refrigeration cycle and repeat the cycle.

[0066] Optionally, based on Figure 1 For an example, see Fig.11 , Fig.11 Schematic diagram of the structure of the fourth embodiment of the air conditioning system of the present application. Fig.11 As shown, the air conditioning system 100 of this embodiment does not need to be provided with a four-way reversing valve 80. In addition to the compressor 10, the heat storage module 20, the indoor heat exchanger 30, the throttling device 40, the bypass stop valve 90, the capillary tube 50 and the outdoor heat exchanger 60, the air conditioning system 100 of this embodiment also includes a second three-way valve 92. Among them, the indoor heat exchanger 30 of this embodiment is provided with a water inlet and a water outlet.

[0067] like Fig.11 As shown, the second three-way valve 92 is provided with a fourth connection port C1, a fifth connection port C2 and a sixth connection port C3; the exhaust port of the compressor 10 is connected to the heat storage module 20, the heat storage module 20 is connected to the indoor heat exchanger 30, the indoor heat exchanger 30 is connected to the outdoor heat exchanger 60 through the throttling device 40, the outdoor heat exchanger 60 is connected to the fourth connection port C1 through the capillary 50, the outdoor heat exchanger 60 is also connected to the fourth connection port C1 through the bypass stop valve 90, the fifth connection port C2 is connected to the heat storage module 20, and the sixth connection port C3 is connected to the air inlet of the compressor 10; the heat storage module 20 is also connected to the air inlet of the compressor 10.

[0068] In this embodiment, Fig.11 The heating modes of the air-conditioning system include pure heating mode and heating and anti-frost mode.

[0069] See also Fig.12 , Fig.12 yes Fig.11 Schematic diagram of the refrigerant cycle in the pure heating mode of the air conditioning system. Fig.12 As shown, in Fig.11In the pure heating mode of the air conditioning system 100 shown in the figure, the controller (not shown) of the air conditioning system 100 controls the fourth connection port C1 to be connected to the sixth connection port C3 and controls the bypass stop valve 90 to be connected ( Fig.12 The dotted line in the figure indicates that the branch is disconnected.)

[0070] At this time, if Fig.12 As shown, when the air-conditioning system 100 operates in the pure heating mode, the high-temperature and high-pressure gas discharged from the exhaust port of the compressor 10 flows through the heat storage module 20 and the indoor heat exchanger 30 to charge the heat storage module 20 and provide heat for the indoor room; the refrigerant flows out from the indoor heat exchanger 30, flows through the throttling device 40 and then enters the outdoor heat exchanger 60 to absorb outdoor heat and evaporate the refrigerant, and the low-temperature and low-pressure refrigerant flows through the bypass stop valve 90, the capillary tube 50, the fourth connecting port C1 and the sixth connecting port C3 to return to the air inlet of the compressor 10 to complete the pure heating cycle and repeat the cycle.

[0071] See also Fig.13 , Fig.13 yes Fig.11 Schematic diagram of the refrigerant cycle in the heating and frost suppression mode of the air conditioning system. Fig.13 As shown, in Fig.11 In the heating and frost suppression mode of the air conditioning system 100 shown in the figure, the controller (not shown) of the air conditioning system 100 controls the fourth connection port C1 and the fifth connection port C2 to be connected and controls the bypass stop valve 90 to be connected ( Fig.13 The dotted line in the figure indicates that the branch is disconnected.)

[0072] At this time, if Fig.13 As shown, when the air-conditioning system 100 operates in the heating and frost suppression mode, the high-temperature and high-pressure gas discharged from the exhaust port of the compressor 10 flows through the heat storage module 20 and the indoor heat exchanger 30 to charge the heat storage module 20 and provide heat for the indoor room; the refrigerant flows out from the indoor heat exchanger 30, flows through the throttling device 40 and then enters the outdoor heat exchanger 60 to absorb outdoor heat and evaporate the refrigerant, and the low-temperature and low-pressure refrigerant flows through the bypass stop valve 90, the capillary tube 50, the fourth connection port C1, the fifth connection port C2 and the heat storage module 20 back to the air inlet of the compressor 10 to complete the heating and frost suppression cycle and repeat the cycle.

[0073] In the heating and frost suppression mode of the air conditioning system 100 of the present embodiment, as described above, the refrigerant flows out from the indoor heat exchanger 30, flows through the throttling device 40, and then enters the outdoor heat exchanger 60 to absorb outdoor heat and evaporate the refrigerant. The low-temperature and low-pressure refrigerant flows through the bypass stop valve 90, the capillary tube 50, the fourth connection port C1, the fifth connection port C2 and the heat storage module 20 and returns to the air inlet of the compressor 10. In this process, the heat storage module 20 also serves as an indirect heat regenerator to heat the refrigerant, and can also reduce the load of the outdoor heat exchanger 60, increase the evaporation temperature of the outdoor heat exchanger 60, delay the frost of the outdoor heat exchanger 60, and extend the high-capacity continuous heating time.

[0074] See also Fig.14 , Fig.14 yes Fig.11 Schematic diagram of the refrigerant cycle in the defrost mode of the air conditioning system. Fig.14 As shown, in Fig.11 In the defrosting mode of the air conditioning system 100 shown in the figure, the controller (not shown) of the air conditioning system 100 controls the fourth connection port C1 to be connected with the fifth connection port C2 and controls the bypass stop valve 90 to be closed ( Fig.14 The dotted line in the figure indicates that the branch is disconnected.)

[0075] At this time, if Fig.14 As shown, when the air-conditioning system 100 operates in the defrost mode, the high-temperature and high-pressure gas discharged from the exhaust port of the compressor 10 flows through the heat storage module 20 and the indoor heat exchanger 30 to charge the heat storage module 20 and provide heat for the indoor room; the throttling device 40 is fully opened, and the refrigerant flows out from the indoor heat exchanger 30, flows through the throttling device 40 and enters the outdoor heat exchanger 60 for defrosting, and the evaporated refrigerant flows through the capillary tube 50, the fourth connecting port C1, the fifth connecting port C2 and the heat storage module 20 to return to the air inlet of the compressor 10 to complete the defrost cycle and repeat the cycle.

[0076] In this embodiment, when switching from the heating frost suppression mode to the defrost mode, the second three-way valve 92 does not need to be reversed, and only the bypass stop valve 90 needs to be closed. At this time, the refrigerant still flows in the forward direction to achieve non-stop defrosting and reduce indoor temperature fluctuations.

[0077] Optionally, based on all the above embodiments, please refer to Fig.15 , Fig.15 Schematic diagram of the structure of the fifth embodiment of the air conditioning system of the present application. Fig.15 As shown, the air conditioning system 100 of this embodiment further includes a shunt branch 93 , one end of the shunt branch 93 is connected to the heat storage module 20 , and the other end of the shunt branch 93 is connected to the throttling element 40 .

[0078] In the heating mode and the cooling mode, the shunt branch 93 is closed; in the defrosting mode, the shunt branch 93 is turned on and the opening of the shunt branch is adjusted based on the defrosting demand.

[0079] Specifically, in this embodiment, the shunt branch 93 may be provided with an adjustable solenoid valve, which is completely closed in the heating mode and the cooling mode; in the defrosting mode, the adjustable solenoid valve adjusts its opening based on the defrosting demand. That is, in the defrosting mode, when the defrosting heat is insufficient, the adjustable solenoid valve of the shunt branch 93 may adjust its opening according to demand, adjust the high-temperature refrigerant flow, and achieve rapid defrosting while ensuring the indoor water supply temperature.

[0080] In other embodiments, the diversion branch 93 may also be provided with other types of valves, which are not limited here.

[0081] Optionally, based on all the above embodiments, in the air-conditioning system 100 of the present application, when the air-conditioning system 100 is in the heating mode and the cooling mode, the throttling element 40 is set to be throttled, and in the defrosting mode, the throttling element 40 is set to be fully open.

[0082] The above are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An air conditioning system, It is characterized in that It includes a compressor, a heat storage module, an indoor heat exchanger, a throttling device, a bypass stop valve, a capillary tube, an outdoor heat exchanger and a second three-way valve; The exhaust port of the compressor is connected to the heat storage module, the indoor heat exchanger is connected to the outdoor heat exchanger through the throttling element, and the bypass stop valve is connected to the outdoor heat exchanger and the air inlet of the compressor; In the defrost mode, the bypass stop valve is controlled to be closed, and the heat storage module is controlled to be connected to the indoor heat exchanger, the outdoor heat exchanger is connected to the heat storage module through the capillary tube, and the heat storage module is controlled to be connected to the air inlet of the compressor; The second three-way valve is provided with a fourth connection port, a fifth connection port and a sixth connection port; the outdoor heat exchanger is connected to the fourth connection port through the capillary tube, the outdoor heat exchanger is also connected to the fourth connection port through the bypass stop valve, the fifth connection port is connected to the heat storage module, and the sixth connection port is connected to the air inlet of the compressor; The heating mode includes a pure heating mode and a heating frost suppression mode; in the pure heating mode, the fourth connection port is controlled to be connected to the sixth connection port and the bypass stop valve is controlled to be connected; in the heating frost suppression mode, the fourth connection port is controlled to be connected to the fifth connection port and the bypass stop valve is controlled to be connected; when switching from the heating frost suppression mode to the defrost mode, the connection mode of the second three-way valve is kept unchanged, and the bypass stop valve is controlled to be closed.

2. The air conditioning system according to claim 1, It is characterized in that It also includes a shunt branch, one end of which is connected to the heat storage module, and the other end of which is connected to the throttling element; In the heating mode and the cooling mode, the shunt branch is closed; In the defrost mode, the shunt branch is turned on and the opening of the shunt branch is adjusted based on the defrost demand.

3. The air conditioning system according to claim 2, It is characterized in that The shunt branch includes an adjustable solenoid valve. In the heating mode and the cooling mode, the adjustable solenoid valve is completely closed; in the defrosting mode, the adjustable solenoid valve adjusts its opening degree based on the defrosting demand.

4. The air conditioning system according to claim 1, It is characterized in that In the heating mode and the cooling mode, the throttling element is set to be throttled, and in the defrosting mode, the throttling element is set to be fully open.

Images