CN210154145U - Air conditioning system - Google Patents
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- CN210154145U CN210154145U CN201920951950.0U CN201920951950U CN210154145U CN 210154145 U CN210154145 U CN 210154145U CN 201920951950 U CN201920951950 U CN 201920951950U CN 210154145 U CN210154145 U CN 210154145U
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Abstract
The utility model relates to an air conditioning system, which comprises a compressor, an indoor heat exchanger and an outdoor heat exchanger which are sequentially communicated; the bypass mechanism is communicated between the outdoor heat exchanger and the exhaust end of the compressor; the first heating mechanism is communicated between the indoor heat exchanger and the air suction end of the compressor; and in the defrosting and heating mode, the bypass mechanism is switched on, one path of the refrigerant discharged by the compressor flows to the indoor heat exchanger, the other path of the refrigerant flows to the outdoor heat exchanger through the bypass mechanism, and the refrigerant flowing out of the indoor heat exchanger flows back to the compressor after passing through at least part of the first heating mechanism. When the air conditioning system is defrosted, continuous heating of the indoor space can still be realized.
Description
Technical Field
The utility model relates to an air conditioning technology field especially relates to an air conditioning system.
Background
When the air conditioning system operates in heating, the surface of the outdoor heat exchanger is frosted under the influence of the ambient temperature and the relative humidity. Under the condition of a certain ambient temperature, the higher the relative humidity is, the higher the frosting speed of the outdoor heat exchanger is, and the higher the heating attenuation of the air conditioning system is. Therefore, the air conditioning system is switched to a cooling operation mode after heating for a period of time, and defrosting of the outdoor heat exchanger is performed by means of high-temperature and high-pressure refrigerant vapor discharged from the compressor.
However, the defrosting method described above causes a problem that heating cannot be continuously performed on the indoor unit side of the air conditioning system, and the more frequent defrosting causes more frequent fluctuation of the indoor temperature, and the longer defrosting is performed each time, the more fluctuation of the indoor temperature is.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide an air conditioning system that can perform indoor side continuous heating during defrosting, in order to solve the problem that the conventional air conditioning system cannot perform indoor side continuous heating during defrosting.
An air conditioning system comprises a compressor, an indoor heat exchanger and an outdoor heat exchanger which are sequentially communicated;
the bypass mechanism is communicated between the outdoor heat exchanger and the exhaust end of the compressor;
the first heating mechanism is communicated between the indoor heat exchanger and a suction end of the compressor;
in the defrosting and heating mode, the bypass mechanism is switched on, one path of the refrigerant discharged by the compressor flows to the indoor heat exchanger, the other path of the refrigerant flows to the outdoor heat exchanger through the bypass mechanism, and at least part of the refrigerant flowing out of the indoor heat exchanger flows back to the compressor after passing through the first heating mechanism.
In one embodiment, the air conditioning system further comprises a first throttling mechanism, wherein the first throttling mechanism is communicated between the indoor heat exchanger and the outdoor heat exchanger;
one end of the bypass mechanism is communicated with the exhaust end of the compressor, and the other end of the bypass mechanism is communicated between the first throttling mechanism and the outdoor heat exchanger or directly communicated with the outdoor heat exchanger;
in the defrosting mode, the bypass mechanism is connected, and the first throttling mechanism is connected or disconnected.
In one embodiment, one end of the first heating mechanism is communicated between the indoor heat exchanger and the first throttling mechanism or directly communicated with the indoor heat exchanger, and the other end of the first heating mechanism is communicated with a suction end of the compressor.
In one embodiment, the bypass mechanism comprises a bypass line and a first on-off valve, one end of the bypass line is communicated with the exhaust end of the compressor, the other end of the bypass line is communicated with the outdoor heat exchanger, and the first on-off valve is assembled on the bypass line.
In one embodiment, the air conditioning system further comprises a second throttling mechanism, one end of the second throttling mechanism is communicated with the indoor heat exchanger, and the other end of the second throttling mechanism is communicated with the first heating mechanism.
In one embodiment, the air conditioning system further comprises a gas-liquid separator having a first inlet in communication with the outdoor heat exchanger and an outlet in communication with a suction side of the compressor;
wherein the gas-liquid separator further has a second inlet in communication with the first heating mechanism.
In one embodiment, the air conditioning system further comprises a gas-liquid separator having a first inlet in communication with the outdoor heat exchanger and an outlet in communication with a suction side of the compressor;
the gas-liquid separator is also provided with a liquid outlet;
the air conditioning system further comprises a second heating mechanism, and the second heating mechanism is communicated between the liquid outlet of the gas-liquid separator and the air suction end of the compressor.
In one embodiment, the air conditioning system further comprises a pressure balancing valve in communication between the outlet of the gas-liquid separator and the second heating mechanism.
In one embodiment, the air conditioning system further comprises a second heating mechanism;
the second heating mechanism is communicated between the discharge end of the first heating mechanism and the suction end of the compressor.
In one embodiment, the suction end of the compressor is provided with a suction port and an enthalpy increasing port, and at least part of the refrigerant flowing out of the indoor heat exchanger flows back to the suction port and/or the enthalpy increasing port of the compressor after passing through the first heating mechanism.
In one embodiment, the air conditioning system further includes a first communication pipeline, a second on-off valve and a third on-off valve, two ends of the first communication pipeline are respectively communicated with the discharge end of the first heating mechanism and the suction port of the compressor, two ends of the second communication pipeline are respectively communicated with the discharge end of the first heating mechanism and the enthalpy-increasing port of the compressor, the second on-off valve is assembled on the first communication pipeline, and the third on-off valve is assembled on the second communication pipeline.
In one embodiment, the air conditioning system further comprises a second heating mechanism;
the second heating mechanism is communicated between the discharge end of the first heating mechanism and the suction end of the compressor;
the two ends of the first communication pipeline are respectively communicated with the discharge end of the second heating mechanism and the air suction port of the compressor, and the two ends of the second communication pipeline are respectively communicated with the discharge end of the second heating mechanism and the enthalpy increasing port of the compressor.
In one embodiment, the first heating mechanism is communicated between the outdoor heat exchanger and a suction end of the compressor, and the refrigerant flowing out of the outdoor heat exchanger flows back to the compressor after passing through the first heating mechanism.
In one embodiment, the air conditioning system further comprises a third communication pipeline and a fourth communication pipeline, wherein one end of the third communication pipeline is communicated with the indoor heat exchanger and penetrates through the first heating mechanism, the other end of the third communication pipeline is communicated with the enthalpy increasing port of the compressor, one end of the fourth communication pipeline is communicated with the outdoor heat exchanger and penetrates through the first heating mechanism, and the other end of the fourth communication pipeline is communicated with the air suction port of the compressor;
the air conditioning system also comprises a fifth communication pipeline and a fourth break valve, wherein the fifth communication pipeline is communicated between the third communication pipeline and the fourth communication pipeline, and the fourth break valve is assembled on the fifth communication pipeline;
and the communication point of the fifth communication pipeline, the third communication pipeline and the fourth communication pipeline is positioned at the upstream of the liquid inlet end of the first heating mechanism.
In one embodiment, the air conditioning system further includes a fifth on-off valve, and the fifth on-off valve is mounted on the third communication pipeline and located between the first heating mechanism and the enthalpy increasing port of the compressor.
In one embodiment, the first heating mechanism is an electric heating mechanism.
When defrosting is needed, the air conditioning system is conducted by controlling the bypass mechanism, one path of high-temperature and high-pressure gaseous refrigerant discharged by the compressor flows to the indoor heat exchanger for heat exchange, and the other path of high-temperature and high-pressure gaseous refrigerant flows to the outdoor heat exchanger through the bypass mechanism for defrosting of the outdoor heat exchanger. The refrigerant after heat exchange with the indoor heat exchanger is heated by the first heating mechanism and then flows back to the compressor, and the refrigerant after defrosting of the outdoor heat exchanger flows back to the compressor. Therefore, when the air conditioning system is defrosted, the indoor space can be heated, and the heating continuity is ensured, so that the fluctuation of the indoor temperature during defrosting is reduced.
Drawings
Fig. 1 is a schematic diagram of an air conditioning system according to a first embodiment of the present invention;
fig. 2 is a schematic diagram of an air conditioning system according to a second embodiment of the present invention;
fig. 3 is a flowchart illustrating a control method for an air conditioning system according to an embodiment of the present invention.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, an embodiment of the present invention provides an air conditioning system 100, which includes a compressor 10, an indoor heat exchanger 20, and an outdoor heat exchanger 40, which are sequentially connected. Specifically, the compressor 10, the indoor heat exchanger 20 and the outdoor heat exchanger 40 are communicated with each other through pipelines.
Specifically, the air conditioning system 100 further includes a first throttling mechanism 30, and the compressor 10, the indoor heat exchanger 20, the first throttling mechanism 30 and the outdoor heat exchanger 40 are sequentially communicated through a pipeline.
During heating, high-temperature and high-pressure gaseous refrigerant discharged from the compressor 10 enters the indoor heat exchanger 20 for heat exchange, at this time, the gaseous refrigerant is condensed into high-pressure liquid and throttled by the first throttling mechanism 30, and then becomes low-temperature and low-pressure saturated liquid refrigerant, enters the outdoor heat exchanger 40 for evaporation, and then flows back to the compressor 10, and the cycle is repeated in this way, so that the purpose of heating is achieved.
The air conditioning system 100 further includes a bypass mechanism 50 and a first heating mechanism 60, wherein the bypass mechanism 50 is connected between the outdoor heat exchanger 40 and the discharge end of the compressor 10, and the first heating mechanism 60 is connected between the indoor heat exchanger 20 and the suction end of the compressor 10. By operating the bypass mechanism 50, the air conditioning system 100 can be switched between the normal heating mode and the defrosting heating mode.
In the normal heating mode (when the outdoor heat exchanger 40 does not need defrosting), the air conditioning system 100 controls the bypass mechanism 50 to be turned off, so that all the high-temperature and high-pressure gaseous refrigerant discharged by the compressor 10 enters the indoor heat exchanger 20 for heat exchange, at least part of the refrigerant after heat exchange with the indoor heat exchanger 20 enters the outdoor heat exchanger 40, exchanges heat with the outdoor heat exchanger 40, and then flows back into the compressor 10.
In the defrosting and heating mode (when the outdoor heat exchanger 40 needs defrosting), the air conditioning system 100 controls the bypass mechanism 50 to be turned on, so that one path of the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 10 flows to the indoor heat exchanger 20 for heat exchange, and the other path of the high-temperature and high-pressure gaseous refrigerant flows to the outdoor heat exchanger 40 through the bypass mechanism 50 for defrosting the outdoor heat exchanger 40. At least a portion of the refrigerant after heat exchange with the indoor heat exchanger 20 is heated by the first heating mechanism 60 and then flows back to the compressor 10, and the refrigerant after defrosting of the outdoor heat exchanger 40 flows back to the compressor 10.
Through the arrangement, when the air conditioning system 100 needs to be defrosted, the indoor space can be heated, and the heating continuity is ensured, so that the fluctuation of the indoor temperature during defrosting is reduced.
Here, in the normal heating mode, the case where at least part of the refrigerant having exchanged heat with the indoor heat exchanger 20 flows to the outdoor heat exchanger 40 includes:
at least part of the refrigerant after exchanging heat with the indoor heat exchanger 20 flows to the outdoor heat exchanger 40 after being throttled by the first throttling mechanism 30; or at least part of the refrigerant after exchanging heat with the indoor heat exchanger 20 flows to the outdoor heat exchanger 40 after being throttled by the first throttling mechanism 30.
Specifically, one end of the bypass mechanism 50 is communicated with the exhaust end of the compressor 10, and the other end is communicated between the first throttling mechanism 30 and the outdoor heat exchanger 40; one end of the first heating means 60 communicates between the indoor heat exchanger 20 and the first throttling means 30, and the other end communicates with the suction end of the compressor 10. By operating the bypass mechanism 50 and the first throttle mechanism 30, the air conditioning system 100 can be switched between the normal heating mode and the defrosting heating mode.
In a normal heating mode (when the outdoor heat exchanger 40 does not need defrosting), the air conditioning system 100 controls the bypass mechanism 50 to be disconnected, the first throttling mechanism 30 is switched on, so that all high-temperature and high-pressure gaseous refrigerants discharged by the compressor 10 enter the indoor heat exchanger 20 for heat exchange, at least part of the refrigerants after heat exchange with the indoor heat exchanger 20 enter the outdoor heat exchanger 40 after being throttled by the first throttling mechanism 30, and flow back into the compressor 10 after heat exchange with the outdoor heat exchanger 40.
In the defrosting and heating mode (when the outdoor heat exchanger 40 needs defrosting), the air conditioning system 100 controls the bypass mechanism 50 to be turned on, the first throttling mechanism 30 is turned off, one path of the high-temperature and high-pressure gaseous refrigerant discharged by the compressor 10 flows to the indoor heat exchanger 20 for heat exchange, and the other path of the high-temperature and high-pressure gaseous refrigerant flows to the outdoor heat exchanger 40 through the bypass mechanism 50 for defrosting the outdoor heat exchanger 40. Wherein, the refrigerant after heat exchange with the indoor heat exchanger 20 is heated by the first heating mechanism 60 and then flows back to the compressor 10, and the refrigerant after defrosting of the outdoor heat exchanger 40 flows back to the compressor 10; or the air conditioning system 100 controls the bypass mechanism 50 to be conducted and the first throttling mechanism 30 to be conducted in the defrosting mode, one path of the high-temperature and high-pressure gaseous refrigerant discharged by the compressor 10 flows to the indoor heat exchanger 20 for heat exchange, the other path of the high-temperature and high-pressure gaseous refrigerant flows to the outdoor heat exchanger 40 through the bypass mechanism 50, one path of the refrigerant after heat exchange with the indoor heat exchanger 20 is heated by the first heating mechanism 60 and then flows back to the compressor 10, and the other path of the refrigerant after heat exchange with the refrigerant flowing out through the bypass mechanism 50 is mixed and then flows to the outdoor heat exchanger 40 together.
With continued reference to fig. 1, in a first embodiment:
the air conditioning system 100 further includes a four-way valve 70, wherein the four-way valve 70 has a first port, a second port, a third port and a fourth port, the first port is communicated with the outdoor heat exchanger 40, the second port is communicated with the exhaust end of the compressor 10, the third port is communicated with the outdoor heat exchanger 40, and the fourth port is communicated with the suction end of the compressor 10.
When the heating mode is normal and defrosting heating mode, the first valve port is communicated with the second valve port, and the third valve port is communicated with the fourth valve port. And when in the refrigeration mode, the second valve port is communicated with the third valve port, and the first valve port is communicated with the fourth valve port.
By providing the air conditioning system 100 with the four-way valve 70, the air conditioning system 100 can have a heating function and a cooling function. It is understood that in other embodiments, the four-way valve 70 may be omitted from the air conditioning system 100, and the air conditioning system 100 may only have a heating function, which is not limited herein.
The bypass mechanism 50 includes a bypass line 51 and a first on-off valve 52, one end of the bypass line 51 is communicated between the exhaust end of the compressor 10 and the four-way valve 70, the other end of the bypass line 51 is communicated between the first throttling mechanism 30 and the outdoor heat exchanger 40, the first on-off valve 52 is assembled on the bypass line 51, and the on-off of the bypass line 51 can be controlled by controlling the on-off of the first on-off valve 52. It is understood that in other embodiments, one end of the bypass line 51 may also be connected between the four-way valve 70 and the indoor heat exchanger 20, and the other end of the bypass line 51 is connected between the first throttling mechanism 30 and the outdoor heat exchanger 40, which is not limited herein.
Specifically, the first on-off valve 52 is a solenoid valve that is opened when energized and closed when de-energized, thereby achieving the on or off of the bypass line 51. It is understood that, in other embodiments, the first on-off valve 52 may also be a manual valve, and is not limited herein.
The air conditioning system 100 further includes a second throttling mechanism 80, one end of the second throttling mechanism 80 is communicated between the indoor heat exchanger 20 and the first throttling mechanism 30, and the other end is communicated with the first heating mechanism 60, that is, two ends of the first heating mechanism 60 are respectively communicated with the second throttling mechanism 80 and the air suction end of the compressor 10. In this way, the refrigerant flowing from the indoor heat exchanger 20 to the first heating means 60 flows through the second throttling means 80 and then flows to the first heating means 60 to be heated.
Through the arrangement of the second throttling mechanism 80, not only can the throttling of the refrigerant leading to the first heating mechanism 60 be realized, but also whether the refrigerant flows to the first heating mechanism 60 for heating can be conveniently controlled. If in the normal heating mode, the second throttling mechanism 80 is turned off, and at this time, all the refrigerant flowing out of the indoor heat exchanger 20 flows to the first throttling mechanism 30, and flows to the outdoor heat exchanger 40 after being throttled; in the cooling mode, the second throttling mechanism 80 may be turned off, and at this time, the refrigerant flowing out of the outdoor heat exchanger 40 passes through the first throttling mechanism 30 and then flows into the indoor heat exchanger 20 to exchange heat. In the normal heating mode, the second throttling mechanism 80 may be turned on, and at this time, a part of the refrigerant flowing out of the indoor heat exchanger 20 flows to the first throttling mechanism 30, is throttled and then flows to the outdoor heat exchanger 40, and the other part of the refrigerant flows to the first heating mechanism 60, is heated and then flows to the suction end of the compressor 10 after being throttled by the second throttling mechanism 80; in the cooling mode, the second throttling mechanism 80 may be turned on, and at this time, a part of the refrigerant flowing out of the outdoor heat exchanger 40 is throttled by the first throttling mechanism 30 and flows to the indoor heat exchanger 20 for heat exchange, and the other part of the refrigerant is throttled by the second throttling mechanism 80 and flows to the first heating mechanism 60 for heating and flows to the suction end of the compressor 10.
The air conditioning system 100 further includes a gas-liquid separator 90, wherein the gas-liquid separator 90 has a first inlet and an outlet, the first inlet is communicated with the fourth valve port of the four-way valve 70, and the outlet is communicated with the suction end of the compressor 10. During heating (including a normal heating mode and a defrosting heating mode), the third valve port and the fourth valve port of the four-way valve 70 are communicated, and the gas-liquid separator 90 is communicated between the outdoor heat exchanger 40 and the suction end of the compressor 10, so that the refrigerant after exchanging heat with the outdoor heat exchanger 40 passes through the gas-liquid separator 90 to undergo gas-liquid separation and then flows to the suction end of the compressor 10.
Specifically, the air suction end of the compressor 10 is provided with an air suction port and an enthalpy increasing port, the outlet of the gas-liquid separator 90 is communicated with the air suction port of the compressor 10, and all the gas separated from the gas-liquid separator 90 enters the compressor 10 from the air suction port of the compressor 10.
The air conditioning system 100 further includes a second heating mechanism 110, the gas-liquid separator 90 has a liquid outlet, and the second heating mechanism 110 is communicated between the liquid outlet of the gas-liquid separator 90 and the air suction end of the compressor 10. With the above arrangement, the liquid separated by the gas-liquid separator 90 can be heated by the second heating mechanism 110 to form a gas, and the gas flows to the suction end of the compressor 10.
Specifically, the second heating mechanism 110 is communicated between the end of the first heating mechanism 60 not communicated with the second throttling mechanism 80 and the suction end of the compressor 10, that is, the first heating mechanism 60 is communicated with the suction end of the compressor 10 through the second heating mechanism 110. The refrigerant is heated by the first heating mechanism 60 and flows to the second heating mechanism 110, and the liquid formed after the refrigerant and the gas-liquid separator 90 are separated is heated again by the second heating mechanism 110 and then enters the air suction end of the compressor 10, so that the refrigerant entering the air suction end of the compressor 10 is not mixed with liquid.
It is understood that in other embodiments, the first heating mechanism 60 may not be in communication with the suction end of the compressor 10 through the second heating mechanism 110, that is, the first heating mechanism 60 is in direct communication with the suction end of the compressor 10. In other embodiments, the end of the first heating mechanism 60 not in communication with the second throttling mechanism 80 is in communication with the gas-liquid separator 90. In this way, the refrigerant heated by the first heating mechanism 60 enters the suction end of the compressor 10 after being subjected to gas-liquid separation by the gas-liquid separator 90, which is not limited herein.
When the first heating mechanism 60 communicates with the suction end of the compressor 10 through the second heating mechanism 110, the air conditioning system 100 further includes a pressure balance valve 140, and both ends of the pressure balance valve 140 communicate with the discharge end of the first heating mechanism 60 and the outlet of the gas-liquid separator 90, respectively. In this way, the pressure between the refrigerant flowing out of the first heating mechanism 60 and the gas-liquid separator 90 can be balanced, so that the liquid separated from the gas-liquid separator 90 can more easily enter the second heating mechanism 110 from the liquid outlet end thereof.
In this embodiment, the air conditioning system 100 further includes a liquid outlet pipe 120 connected between the liquid outlet of the gas-liquid separator 90 and the second heating mechanism 110, and a liquid outlet valve 130 mounted on the liquid outlet pipe 120, wherein the liquid outlet valve 130 can control whether the liquid separated from the gas-liquid separator 90 flows into the second heating mechanism 110 for heating.
Specifically, the first heating means 60 is selectively communicated with the suction port or the enthalpy increasing port of the compressor 10. The air conditioning system 100 includes a first communicating pipe 150, a second communicating pipe 160, a second on-off valve 170 and a third on-off valve 180, the first communicating pipe 150 is communicated between the second heating mechanism 110 and the suction port of the compressor 10, the second communicating pipe 160 is communicated between the second heating mechanism 110 and the enthalpy increasing port of the compressor 10, the second on-off valve 170 is assembled on the first communicating pipe 150 for controlling the on-off of the first communicating pipe 150, and the third on-off valve 180 is assembled on the second communicating pipe 160 for controlling the on-off of the second communicating pipe 160.
With the above arrangement, the discharge end of the first heating mechanism 60 is communicated with the suction port or the enthalpy increasing port of the compressor 10 through the second heating mechanism 110, that is, when the second cut-off valve 170 is selectively opened and the third cut-off valve 180 is closed, the second heating mechanism 110 is communicated with the suction port of the compressor 10, and at this time, the gas flowing out of the second heating mechanism 110 flows into the compressor 10 from the suction port, so as to supplement the air for the compressor 10; when the second cut-off valve 170 is selectively closed and the third cut-off valve 180 is opened, the second heating means 110 is communicated with the enthalpy increasing port of the compressor 10, and at this time, the gas flowing out of the second heating means 110 flows to the enthalpy increasing port of the compressor 10 for increasing the enthalpy of the compressor 10.
It is understood that, in other embodiments, the first communication pipe 150 may also be directly connected between the first heating device 60 and the suction port of the compressor 10, and the second communication pipe 160 may also be directly connected between the first heating device 60 and the enthalpy-increasing port of the compressor 10, which is not limited herein.
Further, one end of the second communicating pipe 160 is directly communicated with the second heating mechanism 110, one end of the first communicating pipe 150 is indirectly communicated with the second heating mechanism 110 through the second communicating pipe 160, and the first communicating pipe 150 converges on a pipe where the gas-liquid separator 90 is communicated with the suction port of the compressor 10 to be communicated with the suction port of the compressor 10, that is, the other end of the first communicating pipe 150 is indirectly communicated with the suction port of the compressor 10 through a pipe communicated between the gas-liquid separator 90 and the suction port of the compressor 10. In other embodiments, the connection position between the two ends of the first communication pipeline 150 and the two ends of the second communication pipeline 160 is not limited, as long as the two ends of the first communication pipeline 150 are respectively communicated with the second heating mechanism 110 and the suction port of the compressor 10, and the two ends of the second communication pipeline 160 are respectively communicated with the enthalpy increasing ports of the second heating mechanism 110 and the compressor 10, which is not limited herein.
Specifically, the second on-off valve 170 and the third on-off valve 180 are both solenoid valves, which are opened when the solenoid valves are energized and closed when the solenoid valves are de-energized, thereby achieving the on/off of the bypass line 51. It is understood that, in other embodiments, the second cut-off valve 170 and the third cut-off valve 180 may also be manual valves, and are not limited herein.
In the present embodiment, the first heating mechanism 60 and the second heating mechanism 110 are both electric heating mechanisms. Specifically, the first heating mechanism 60 includes a housing and an electric heating tube disposed in the housing for exchanging heat with a refrigerant flowing through the duct.
The operating principle of the air conditioning system 100 provided in the first embodiment is as follows:
in the normal heating mode:
the first port and the second port of the four-way valve 70 are communicated, the third port and the fourth port are communicated, the first on-off valve 52 is disconnected, and the first throttling mechanism 30 and the second throttling mechanism 80 are communicated.
The high-temperature and high-pressure gaseous refrigerant discharged from the compressor 10 enters the four-way valve 70 through the second port of the four-way valve 70, and flows to the indoor heat exchanger 20 from the first port to be condensed. One path of the refrigerant subjected to heat release and condensation is throttled by the first throttling mechanism 30 and flows to the outdoor heat exchanger 40, heat exchange and evaporation are performed in the outdoor heat exchanger 40, the evaporated low-temperature and low-pressure gaseous refrigerant flows to the four-way valve 70 through the third valve port, and the low-temperature and low-pressure gaseous refrigerant is separated from the fourth valve port through the gas-liquid separator 90 and then flows back to the compressor 10, so that the heating cycle is completed. The other path of the refrigerant after heat release and condensation is throttled by the second throttling mechanism 80 and flows to the first heating mechanism 60 for heating and evaporation, the refrigerant after heating and evaporation flows into the second heating mechanism 110 for heating and evaporation again, and when the liquid outlet valve 130 is opened, the liquid separated from the gas-liquid separator 90 can enter the second heating mechanism 110 to be heated and evaporated together with the refrigerant entering from the first heating mechanism 60.
The evaporated refrigerant can be supplied with air or increase enthalpy by controlling the second cut-off valve 170 and the third cut-off valve 180. The method specifically comprises the following steps: when the second on-off valve 170 is opened and the third on-off valve 180 is closed, the part of the refrigerant and the gas separated by the gas-liquid separator 90 flow back to the suction port of the compressor 10 together for gas supplement of the compressor 10; when the second cut-off valve 170 is closed and the third cut-off valve 180 is opened, the portion of the refrigerant flows back to the enthalpy increasing port of the compressor 10 for increasing the enthalpy of the compressor 10.
It is understood that in the normal heating mode, the second throttling mechanism 80 can be turned off, and the air supply or enthalpy increase for the compressor 10 can not be realized, but the normal heating of the air conditioning system 100 can still be ensured.
In the defrosting and heating mode:
the first port and the second port of the four-way valve 70 are communicated, the third port and the fourth port are communicated, the first on-off valve 52 is turned on, the first throttle mechanism 30 is turned off, and the second throttle mechanism 80 is turned on.
One path of the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 10 flows to the indoor heat exchanger 20 through the four-way valve 70, the refrigerant after heat exchange in the indoor heat exchanger 20 is throttled by the second throttling mechanism 80 and flows to the first heating mechanism 60 to be heated and evaporated, and the refrigerant after heating and evaporation flows to the second heating mechanism 110 to be heated and evaporated again. The evaporated refrigerant can be supplied with air or increase enthalpy by controlling the second cut-off valve 170 and the third cut-off valve 180. The method specifically comprises the following steps: when the second on-off valve 170 is opened and the third on-off valve 180 is closed, the part of the refrigerant and the gas separated by the gas-liquid separator 90 flow back to the suction port of the compressor 10 together for gas supplement of the compressor 10; when the second cut-off valve 170 is closed and the third cut-off valve 180 is opened, the portion of the refrigerant flows back to the enthalpy increasing port of the compressor 10 for increasing the enthalpy of the compressor 10.
The other path of the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 10 flows to the outdoor heat exchanger 40 through the bypass pipeline 51 to defrost the outdoor heat exchanger, flows to the gas-liquid separator 90 through the four-way valve 70, is separated and then flows back to the compressor 10; and the liquid separated by the gas-liquid separator 90 can flow to the second heating mechanism 110 through the liquid outlet pipe 120, and is used for air supply or enthalpy increase of the compressor 10 after being heated and evaporated by the second heating mechanism 110 together with the gas heated and evaporated by the first heating mechanism 60.
Alternatively, the first port and the second port of the four-way valve 70 are communicated, the third port and the fourth port are communicated, the first on-off valve 52 is turned on, the first throttling mechanism 30 is turned on, and the second throttling mechanism 80 is turned on.
One path of the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 10 flows to the indoor heat exchanger 20 through the four-way valve 70, and the other path of the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 10 flows to the outdoor heat exchanger 40 through the bypass line 51. One path of the refrigerant after heat exchange of the indoor heat exchanger 20 is throttled by the second throttling mechanism 80 and flows to the first heating mechanism 60 for heating and evaporation, the refrigerant after heating and evaporation flows into the second heating mechanism 110 for reheating and evaporation, and the other path of the refrigerant after heat exchange of the indoor heat exchanger 20 is throttled by the first throttling mechanism 30 and flows to the outdoor heat exchanger 40 together with the refrigerant flowing out through the bypass mechanism 51 for defrosting.
In the cooling mode:
the second port and the third port of the four-way valve 70 are communicated, the first port and the fourth port are communicated, the first on-off valve 52 is closed, and the first throttle mechanism 30 and the second throttle mechanism 80 are communicated.
The high-temperature and high-pressure gaseous refrigerant discharged from the compressor 10 flows to the outdoor heat exchanger 40 through the four-way valve 70 to be subjected to heat release condensation, the refrigerant subjected to heat release condensation is throttled by the first throttling mechanism 30, one path of the refrigerant flows to the indoor heat exchanger 20, the refrigerant is subjected to heat exchange and evaporation in the indoor heat exchanger 20, the evaporated low-temperature and low-pressure gaseous refrigerant flows to the gas-liquid separator 90 through the four-way valve 70 to be separated and then flows back to the compressor 10, and the. The refrigerant after heat release and condensation is throttled by the first throttling mechanism 30, and the other path of the refrigerant is throttled by the second throttling mechanism 80, flows to the first heating mechanism 60, is heated and evaporated, flows into the second heating mechanism 110 to be heated and evaporated again, and is heated and evaporated by the second heating mechanism 110 to be used for air supplement or enthalpy increase of the compressor 10.
It will be appreciated that under the above refrigeration, the second throttling mechanism 80 may also be turned off, in which case no air make-up or enthalpy addition to the compressor 10 will be achieved, but normal refrigeration of the air conditioning system 100 may still be ensured.
Referring to fig. 2, in the second embodiment, the difference from the first embodiment is:
the first heating mechanism 60 is disposed between the outdoor heat exchanger 40 and the gas-liquid separator 90 in a communicating manner, and the refrigerant flowing out of the outdoor heat exchanger 40 is heated by the first heating mechanism 60 and then flows back to the suction end of the compressor 10. In this way, the refrigerant flowing out of the outdoor heat exchanger 40 is first heated and evaporated by the first heating mechanism 60 and then flows into the gas-liquid separator 90 to be separated, thereby reducing the operating pressure of the gas-liquid separator 90.
In addition, in the present embodiment, since the refrigerant flowing out of the outdoor heat exchanger 40 is heated and evaporated by the first heating mechanism 60 and then flows to the gas-liquid separator 90, the liquid separated by the gas-liquid separator 90 is relatively small, and the second heating mechanism 110 can be omitted.
In this embodiment, the air conditioning system 100 further includes a third communicating pipeline 200, a fourth communicating pipeline 210, a fifth communicating pipeline 220 and a fourth shutoff valve 230, one end of the third communicating pipeline 200 is communicated between the first throttling mechanism 30 and the indoor heat exchanger 20, the other end is communicated with the enthalpy increasing port of the compressor 10, two ends of the fourth communicating pipeline 210 are respectively communicated with the outdoor heat exchanger 40 and the suction ports of the compressor 10, the third communicating pipeline 200 is used for circulating the refrigerant flowing out of the indoor heat exchanger 20 and exchanging heat with the first heating mechanism 60, the fourth communicating pipeline 210 is used for circulating the refrigerant flowing out of the outdoor heat exchanger 40 and exchanging heat with the first heating mechanism 60, and the fifth communicating pipeline 220 is communicated between the third communicating pipeline 200 and the fourth communicating pipeline 210. Specifically, the connection points of the fifth communication pipe 220, the third communication pipe 200 and the fourth communication pipe 210 are located upstream of the liquid inlet end of the first heating mechanism 60, and the fourth shut-off valve 230 is mounted on the fifth communication pipe 220.
With the above arrangement, when the fourth shut-off valve 230 is opened, the two pipes can be brought together before entering the first heating mechanism 60 for heating, and thus, the two pipes are communicated with the gas-liquid separator 90 through one of the pipes.
Specifically, the fourth communication pipe 210 communicates with the suction port of the compressor 10 through the gas-liquid separator 90, and the third communication pipe 200 directly communicates with the enthalpy-increasing port of the compressor 10. Thus, when the fourth shut-off valve 230 is opened, one path of the refrigerant, which is formed after heat exchange with the indoor heat exchanger 20, flows to the fourth communication pipeline 210 through the fifth communication pipeline 220, is heated by the first heating mechanism 60, and then flows to the gas-liquid separator 90, and the gas separated by the gas-liquid separator 90 enters the suction port of the compressor 10; the other path of the refrigerant formed after the heat exchange with the indoor heat exchanger 20 passes through the third communication pipeline 200 and flows to the enthalpy increasing port of the compressor 10 after being heated by the first heating mechanism 60, and is used for increasing the enthalpy of the compressor 10.
Further, the air conditioning system 100 further includes a fifth on-off valve 240, the fifth on-off valve 240 is assembled on the third communication pipeline 200 and located between the first heating mechanism 60 and the compressor 10, and the fifth on-off valve 240 is used for controlling on-off of the third communication pipeline 200, so as to control whether enthalpy is added to the compressor 10.
In this embodiment, since the air supplement and enthalpy increase of the compressor 10 can be realized by controlling the on/off of the fourth shut-off valve 230 and the fifth shut-off valve 240, the first communication pipeline 150, the second communication pipeline 160, the second shut-off valve 170, and the third shut-off valve 180 in the above embodiments may be omitted.
It can be understood that, in other embodiments, even though the air supply and the enthalpy increase of the compressor 10 can be achieved by turning on and off the fourth shut-off valve 230 and the fifth shut-off valve 240, the first communication pipeline 150, the second communication pipeline 160, the second shut-off valve 170 and the third shut-off valve 180 may be selectively disposed, at this time, one end of each of the first communication pipeline 150 and the second communication pipeline 160 may be communicated with the air outlet end of the third communication pipeline 200, the other end of the first communication pipeline 150 is communicated with the air inlet of the compressor 10, and the other end of the second communication pipeline 160 is communicated with the enthalpy increase port of the compressor 10, which is not limited herein.
The operating principle of the air conditioning system 100 provided in the second embodiment is as follows:
in the normal heating mode:
the first port and the second port of the four-way valve 70 are communicated, the third port and the fourth port are communicated, the first on-off valve 52 is disconnected, and the first throttling mechanism 30 and the second throttling mechanism 80 are communicated.
The high-temperature and high-pressure gaseous refrigerant discharged from the compressor 10 enters the four-way valve 70 through the second port of the four-way valve 70, and flows to the indoor heat exchanger 20 from the first port to be condensed. One path of the refrigerant subjected to heat release and condensation is throttled by the first throttling mechanism 30 and flows to the outdoor heat exchanger 40, heat exchange and evaporation are performed in the outdoor heat exchanger 40, the evaporated low-temperature and low-pressure gaseous refrigerant flows to the four-way valve 70 through the third valve port, and flows to the gas-liquid separator 90 from the fourth valve port after being heated by the first heating mechanism 60, is separated and then flows back to the compressor 10, and the heating cycle is completed. The other path of the refrigerant after heat release and condensation is throttled by the second throttling mechanism 80 and flows to the first heating mechanism 60, when the fourth shutoff valve 230 is opened and the fifth shutoff valve 240 is closed, the refrigerant is heated by the first heating mechanism 60 and then flows back to the gas-liquid separator 90 to be separated and flows back to the air suction port of the compressor 10 for supplying air, and when the fourth shutoff valve 230 is closed and the fifth shutoff valve 240 is opened, the refrigerant is heated by the first heating mechanism 60 and then directly flows back to the enthalpy increasing port of the compressor 10 for increasing enthalpy.
It is understood that in the normal heating mode, the second throttling mechanism 80 can be turned off, and the air supply or enthalpy increase for the compressor 10 can not be realized, but the normal heating of the air conditioning system 100 can still be ensured.
In the defrosting and heating mode:
the first port and the second port of the four-way valve 70 are communicated, the third port and the fourth port are communicated, the first on-off valve 52 is turned on, the first throttle mechanism 30 is turned off, and the second throttle mechanism 80 is turned on.
One path of the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 10 flows to the outdoor heat exchanger 40 through the four-way valve 70, is defrosted in the outdoor heat exchanger 40, and flows to the first heating mechanism 60 through the four-way valve 70, is heated by the first heating mechanism 60, flows to the gas-liquid separator 90 for separation, flows to the suction port of the compressor 10 after being separated by the gas-liquid separator 90, and completes the circulation. Another path of the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 10 flows to the indoor heat exchanger 20 through the four-way valve 70 to release heat and condense, the condensed refrigerant is throttled by the second throttling mechanism 80 and flows to the first heating mechanism 60, when the fourth shutoff valve 230 is opened and the fifth shutoff valve 240 is closed, the condensed refrigerant is heated by the first heating mechanism 60 and then flows back to the gas-liquid separator 90 to be separated and flows back to the suction port of the compressor 10 to supplement air, and when the fourth shutoff valve 230 is closed and the fifth shutoff valve 240 is opened, the condensed refrigerant is heated by the first heating mechanism 60 and then directly flows back to the enthalpy increasing port of the compressor 10 to increase enthalpy.
Alternatively, the first port and the second port of the four-way valve 70 are communicated, the third port and the fourth port are communicated, the first on-off valve 52 is turned on, the first throttling mechanism 30 is turned on, and the second throttling mechanism 80 is turned on.
One path of the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 10 flows to the outdoor heat exchanger 40 through the four-way valve 70, and is defrosted in the outdoor heat exchanger 40, the other path of the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 10 flows to the indoor heat exchanger 20 through the four-way valve 70 to be condensed, one path of the condensed refrigerant is throttled by the second throttling mechanism 80 and flows to the first heating mechanism 60, and the other path of the condensed refrigerant is throttled by the first throttling mechanism 30 and flows to the outdoor heat exchanger 40 together with the refrigerant flowing out through the bypass mechanism 51 to be defrosted.
In the cooling mode:
the second port and the third port of the four-way valve 70 are communicated, the first port and the fourth port are communicated, the first on-off valve 52 is closed, and the first throttle mechanism 30 and the second throttle mechanism 80 are communicated.
The high-temperature and high-pressure gaseous refrigerant discharged from the compressor 10 flows to the outdoor heat exchanger 40 through the four-way valve 70 to be subjected to heat release condensation, the refrigerant subjected to heat release condensation is throttled by the first throttling mechanism 30 and flows to the indoor heat exchanger 20, the refrigerant is subjected to heat exchange and evaporation in the indoor heat exchanger 20, the evaporated low-temperature and low-pressure gaseous refrigerant flows to the first heating mechanism 60 through the four-way valve 70, the refrigerant flows to the gas-liquid separator 90 for separation after being heated by the first heating mechanism 60, and the refrigerant flows to the suction port of the compressor 10 after being separated by the gas-. The refrigerant after heat release and condensation is throttled by the first throttling mechanism 30, and then flows to the first heating mechanism 60 after the other path is throttled by the second throttling mechanism 80, when the fourth shutoff valve 230 is opened and the fifth shutoff valve 240 is closed, the refrigerant is heated by the first heating mechanism 60 and then flows back to the gas-liquid separator 90 to be separated and flows back to the air suction port of the compressor 10 for air supplement, and when the fourth shutoff valve 230 is closed and the fifth shutoff valve 240 is opened, the refrigerant is heated by the first heating mechanism 60 and then directly flows back to the enthalpy increasing port of the compressor 10 for enthalpy increase.
An embodiment of the present invention further provides a control method of the air conditioning system 100, including the steps of:
s110: when the defrosting condition is met, the bypass mechanism 50 is controlled to be conducted, one path of the refrigerant discharged by the compressor flows to the indoor heat exchanger 20, the other path of the refrigerant flows to the outdoor heat exchanger 40 through the bypass mechanism 50, at least part of the refrigerant flowing out of the indoor heat exchanger 20 flows back to the compressor 10 after passing through the first heating mechanism 60, and the refrigerant flowing out of the outdoor heat exchanger 40 flows back to the compressor 10;
specifically, when the normal heating of the air conditioning system 100 reaches the preset time, the first throttling mechanism 30 is controlled to be turned off or turned on, and the bypass mechanism 50 is controlled to be turned on. It is understood that in other embodiments, the first throttling mechanism 30 may be controlled to be turned on or off and the bypass mechanism 50 may be controlled to be turned on when a system parameter (e.g., temperature) of the air conditioning system 100 reaches a preset threshold, which is not limited herein.
When the bypass mechanism 50 is turned on, one path of the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 10 flows to the indoor heat exchanger 20 for heat exchange, and the other path of the high-temperature and high-pressure gaseous refrigerant flows to the outdoor heat exchanger 40 through the bypass mechanism 50 for defrosting the outdoor heat exchanger 40. At least a portion of the refrigerant after heat exchange with the indoor heat exchanger 20 is heated by the first heating mechanism 60 and then flows back to the compressor 10, and the refrigerant after defrosting of the outdoor heat exchanger 40 flows back to the compressor 10. Thus, when the air conditioning system 100 needs to be defrosted, the indoor space can still be heated, and the continuity of heating is ensured, so that the fluctuation of the indoor temperature during defrosting is reduced.
S120: when the defrosting condition is not satisfied, the bypass mechanism 50 is controlled to be turned off, all the refrigerant discharged from the compressor 10 flows to the indoor heat exchanger 20, and at least a part of the refrigerant flowing out of the outdoor heat exchanger 20 flows to the outdoor heat exchanger 40 and is returned to the compressor 10.
Specifically, when the first throttling mechanism 30 is turned on and the bypass mechanism 50 is turned off, all of the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 10 flows to the indoor heat exchanger 20 to perform a normal heating operation.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (16)
1. An air conditioning system is characterized by comprising a compressor (10), an indoor heat exchanger (20) and an outdoor heat exchanger (40) which are sequentially communicated;
a bypass mechanism (50) communicated between the outdoor heat exchanger (40) and the exhaust end of the compressor (10);
the first heating mechanism (60) is communicated between the indoor heat exchanger (20) and a suction end of the compressor (10);
in the defrosting and heating mode, the bypass mechanism (50) is turned on, one path of the refrigerant discharged by the compressor (10) flows to the indoor heat exchanger (20), the other path of the refrigerant flows to the outdoor heat exchanger (40) through the bypass mechanism (50), and at least part of the refrigerant flowing out of the indoor heat exchanger (20) flows back to the compressor (10) after passing through the first heating mechanism (60).
2. The air conditioning system according to claim 1, further comprising a first throttling mechanism (30), the first throttling mechanism (30) communicating between the indoor heat exchanger (20) and the outdoor heat exchanger (40);
one end of the bypass mechanism (50) is communicated with the exhaust end of the compressor (10), and the other end of the bypass mechanism is communicated between the first throttling mechanism (30) and the outdoor heat exchanger (40) or directly communicated with the outdoor heat exchanger (40);
wherein, in the defrosting and heating mode, the bypass mechanism (50) is conducted, and the first throttling mechanism (30) is conducted or disconnected.
3. Air conditioning system according to claim 2, characterized in that said first heating means (60) communicates at one end with said indoor heat exchanger (20) and said first throttling means (30) or with said indoor heat exchanger (20) directly and at the other end with the suction end of said compressor (10).
4. Air conditioning system according to claim 1, characterized in that said bypass means (50) comprise a bypass line (51) and a first on-off valve (52), said bypass line (51) communicating at one end with the discharge end of said compressor (10) and at the other end with said outdoor heat exchanger (40), said first on-off valve (52) being fitted on said bypass line (51).
5. The air conditioning system according to claim 1, further comprising a second throttling mechanism (80), one end of the second throttling mechanism (80) communicating with the indoor heat exchanger (20), and the other end of the second throttling mechanism (80) communicating with the first heating mechanism (60).
6. The air conditioning system of claim 1, further comprising a gas-liquid separator (90), the gas-liquid separator (90) having a first inlet in communication with the outdoor heat exchanger (40) and an outlet in communication with a suction side of the compressor (10);
wherein the gas-liquid separator (90) further has a second inlet in communication with the first heating mechanism (60).
7. The air conditioning system of claim 1, further comprising a gas-liquid separator (90), the gas-liquid separator (90) having a first inlet in communication with the outdoor heat exchanger (40) and an outlet in communication with a suction side of the compressor (10);
the gas-liquid separator (90) is also provided with a liquid outlet;
the air conditioning system further comprises a second heating mechanism (110), and the second heating mechanism (110) is communicated between the liquid outlet of the gas-liquid separator (90) and the air suction end of the compressor (10).
8. The air conditioning system of claim 7, further comprising a pressure balancing valve (140), the pressure balancing valve (140) communicating between an outlet of the gas-liquid separator (90) and the second heating mechanism (110).
9. The air conditioning system of claim 1, further comprising a second heating mechanism (110);
the second heating mechanism (110) is communicated between the discharge end of the first heating mechanism (60) and the suction end of the compressor (10).
10. The air conditioning system of claim 1, wherein a suction port and an enthalpy increasing port are formed at a suction end of the compressor (10), and at least a portion of the refrigerant flowing out of the indoor heat exchanger (20) flows back to the suction port and/or the enthalpy increasing port of the compressor (10) after passing through the first heating mechanism (60).
11. The air conditioning system according to claim 10, further comprising a first communication pipe (150), a second communication pipe (160), a second on-off valve (170), and a third on-off valve (180), wherein both ends of the first communication pipe (150) are respectively communicated with the discharge end of the first heating mechanism (60) and the suction port of the compressor (10), both ends of the second communication pipe (160) are respectively communicated with the discharge end of the first heating mechanism (60) and the enthalpy-increasing port of the compressor (10), the second on-off valve (170) is assembled on the first communication pipe (150), and the third on-off valve (180) is assembled on the second communication pipe (160).
12. Air conditioning system according to claim 11, characterized in that it further comprises a second heating means (110);
the second heating mechanism (110) is communicated between the discharge end of the first heating mechanism (60) and the suction end of the compressor (10);
two ends of the first communication pipeline (150) are respectively communicated with the discharge end of the second heating mechanism (110) and the suction port of the compressor (10), and two ends of the second communication pipeline (160) are respectively communicated with the discharge end of the second heating mechanism (110) and the enthalpy increasing port of the compressor (10).
13. The air conditioning system of claim 1, wherein the first heating mechanism (60) is connected between the outdoor heat exchanger (40) and a suction end of the compressor (10), and the refrigerant flowing out of the outdoor heat exchanger (40) flows back to the compressor (10) after passing through the first heating mechanism (60).
14. The air conditioning system as claimed in claim 13, further comprising a third communicating pipe (200) and a fourth communicating pipe (210), wherein one end of the third communicating pipe (200) communicates with the indoor heat exchanger (20) and passes through the first heating means (60), and the other end communicates with an enthalpy-increasing port of the compressor (10), and one end of the fourth communicating pipe (210) communicates with the outdoor heat exchanger (40) and passes through the first heating means (60), and the other end communicates with an air suction port of the compressor (10);
the air conditioning system further comprises a fifth communication pipeline (220) and a fourth shutoff valve (230), wherein the fifth communication pipeline (220) is communicated between the third communication pipeline (200) and the fourth communication pipeline (210), and the fourth shutoff valve (230) is assembled on the fifth communication pipeline (220);
the communication point of the fifth communication pipeline (220) and the third and fourth communication pipelines (200, 210) is located at the upstream of the liquid inlet end of the first heating mechanism (60).
15. Air conditioning system according to claim 14, characterized in that it further comprises a fifth on-off valve (240), said fifth on-off valve (240) being fitted on said third communication duct (200) and being located between said first heating means (60) and the enthalpy-increasing port of said compressor (10).
16. Air conditioning system according to claim 1, characterized in that the first heating means (60) are electric heating means.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021077915A1 (en) * | 2019-10-23 | 2021-04-29 | 珠海格力电器股份有限公司 | Continuous heating control system and method, and air-conditioning device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021077915A1 (en) * | 2019-10-23 | 2021-04-29 | 珠海格力电器股份有限公司 | Continuous heating control system and method, and air-conditioning device |
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