CN110715485A

CN110715485A - Air conditioner, control method and device thereof, and computer-readable storage medium

Info

Publication number: CN110715485A
Application number: CN201911024562.9A
Authority: CN
Inventors: 刘旭; 黎辉玲; 杜顺开; 谭周衡; 曾小朗
Original assignee: Midea Group Co Ltd; Guangdong Midea Refrigeration Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2020-01-21

Abstract

The invention provides an air conditioner, a control method, a control device and a computer readable storage medium thereof. The heat accumulator comprises a heat accumulation pipe, the heat accumulation pipe is connected with the indoor heat exchanger in parallel, and a switch device for controlling the on-off of the heat accumulation pipe is connected to the heat accumulation pipe; the heating device is arranged on the heat accumulator and used for heating the heat accumulator. According to the air conditioner provided by the invention, in the heating mode, whether the heat accumulator needs heat accumulation is judged according to the working condition parameters of the air conditioner, and when the heat accumulator needs heat accumulation, the switching device is started, the heat accumulation pipe is conducted, and the heat accumulation of the heat accumulator is realized. Thereby realizing controllable heat storage and reducing the energy loss of the air conditioning system. Set up heating device, heat the heat accumulator through heating device, improve the heat accumulation speed of heat accumulator to further reduce the time of changing the frost, improve and change white efficiency, and make and change the frost totally, avoid the not enough condition of heat accumulator heat accumulation to take place.

Description

Air conditioner, control method and device thereof, and computer-readable storage medium

Technical Field

The present invention relates to the field of refrigeration equipment, and more particularly, to an air conditioner, a control method and a control device thereof, and a computer-readable storage medium.

Background

When the traditional defrosting mode utilizes heat storage defrosting, a heat accumulator arranged on a compressor shell is used as a main heat source of a defrosting working condition, waste heat of the compressor is absorbed during heating, and during defrosting, a refrigerant flows out of an indoor heat exchanger and then enters an outdoor heat exchanger through a bypass pipeline connected with a throttling component in parallel to defrost.

In the defrosting method, the compressor is used for heat storage and defrosting of the low-temperature heat source, heat storage is carried out by utilizing the heat generated by the compressor, the heat storage is uncontrollable, the phase-change temperature of the phase-change material is low, the heat release speed is low during defrosting, and when the heat storage of the heat storage is insufficient, the problems of long defrosting time, unclean defrosting and the like are caused.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art.

To this end, a first aspect of the present invention is directed to an air conditioner.

A second aspect of the invention aims to provide a control method.

A third aspect of the present invention is directed to a control apparatus.

A fourth aspect of the present invention is directed to an air conditioner.

A fifth aspect of the present invention is directed to a computer-readable storage medium.

To achieve the above object, a first aspect of the present invention provides an air conditioner, comprising: a compressor including an exhaust port and an intake port; the reversing structure comprises a first port, a second port, a third port, a fourth port, a third port and a fourth port, wherein one of the second port and the fourth port is communicated with the first port, the other of the second port and the fourth port is communicated with the third port, the first port is connected with the exhaust port, and the third port is connected with the air inlet; the second port is connected with the first end of the outdoor heat exchanger, the fourth port is connected with the first end of the indoor heat exchanger, and the second end of the outdoor heat exchange tube is connected with the second end of the indoor heat exchanger; the heat accumulator comprises a heat accumulation pipe, the heat accumulation pipe is connected with the indoor heat exchanger in parallel, and a switch device for controlling the on-off of the heat accumulation pipe is connected to the heat accumulation pipe; and the heating device is arranged on the heat accumulator and used for heating the heat accumulator.

According to the air conditioner provided by the technical scheme, whether the heat accumulator needs heat accumulation is judged according to the working condition parameters of the air conditioner in the heating mode, and when the heat accumulator needs heat accumulation, the switch device is started, the heat accumulation pipe is conducted, and the heat accumulation of the heat accumulator is realized. Thereby realizing controllable heat storage and reducing the energy loss of the air conditioning system.

Because the indoor heat exchanger is parallelly connected with the heat accumulation pipe, when heat accumulation, the indoor heat exchanger is flowed through to some high temperature refrigerant, and the heat accumulation pipe is flowed through to some, because the refrigerant temperature of flowing through the heat accumulation pipe is higher, consequently, the heat accumulation of heat accumulator is fast, avoids having the not enough problem of heat accumulator heat accumulation, has reduced the time of defrosting, and makes the defrosting clean.

Set up heating device, heat the heat accumulator through heating device, improve the heat accumulation speed of heat accumulator to further reduce the time of changing the frost, improve and change white efficiency, and make and change the frost totally, avoid the not enough condition of heat accumulator heat accumulation to take place.

In addition, the air conditioner provided by the technical scheme of the invention also has the following additional technical characteristics:

in one embodiment, the air conditioner further includes: and the temperature detection device is arranged on the heat accumulator and used for detecting the temperature of the heat accumulator.

A heat storage cavity is arranged in the heat accumulator, a heat storage material is arranged in the heat storage cavity, and further the heat storage material comprises a phase change material. The temperature detection device is used for detecting the temperature of the heat accumulator, and further, the temperature detection device is used for detecting the temperature of the heat accumulation material. The temperature of the heat accumulator is detected to obtain the heat storage condition of the heat accumulator, so that the heating device or the switching device is controlled, for example, the temperature of the heat accumulator is compared with the phase change temperature of the heat storage material, and whether the heating device needs to be turned off or not is judged. Further, when the difference value between the temperature of the heat accumulator and the phase change temperature of the heat accumulation material is larger than or equal to a preset value, the heating device is controlled to be closed, and otherwise, heat accumulation is continued.

An aspect of a second aspect of the present invention provides a control method of an air conditioner for controlling the air conditioner according to any one of the aspects of the first aspect, the control method including: starting up the machine for heating, and controlling the heating device to be started so as to heat the heat accumulator; and the working condition parameters of the air conditioner meet the preset heat storage condition, and the switching device is controlled to be switched on and maintain the on state of the heating device so as to conduct the heat storage pipe.

According to the control method provided by the technical scheme of the second aspect of the invention, in the heating mode, whether the heat accumulator needs heat accumulation is judged according to the working condition parameters of the air conditioner, and when the heat accumulator needs heat accumulation, the switching device is started, and the heat accumulation pipe is conducted, so that the heat accumulation of the heat accumulator is realized. Thereby realizing controllable heat storage and reducing the energy loss of the air conditioning system.

Set up heating device, when the start heats, open heating device, heat the heat accumulator through heating device, improve the heat accumulation speed of heat accumulator to further reduce the time of changing the frost, improve the efficiency of changing the frost, and make and change the frost clean, avoid the not enough condition of heat accumulator heat accumulation to take place.

In one embodiment, the working condition parameters of the air conditioner do not meet the preset heat storage condition, and the heating device is controlled to be turned off.

When the working condition parameters of the air conditioner do not meet the preset heat storage conditions, the fact that the outdoor heat exchanger does not have the risk of frosting is indicated, and the heat accumulator does not need to store heat, so that the heating device is turned off, and the energy consumption of the system is reduced.

In one embodiment, the operating condition parameters include an exhaust temperature of the compressor, and the operating condition parameters of the air conditioner satisfy a preset heat storage condition, and specifically include: detecting a first maximum value of the exhaust temperature of the compressor between a first preset moment and a second preset moment of starting heating; detecting the exhaust temperature of the compressor after a second preset moment; if the difference between the first maximum value and the exhaust temperature of the compressor is greater than or equal to a first preset difference, the preset heat storage condition is met; and if the difference value between the first maximum value and the exhaust temperature of the compressor is smaller than the first preset difference value, the preset heat storage condition is not met.

When the heating mode is operated, the temperature of a coil of the outdoor heat exchange tube is detected between a first preset time and a second preset time after the heating mode is operated, the maximum value (first maximum value) of the exhaust temperature of the compressor between the first preset time and the second preset time is obtained, the exhaust temperature of the compressor is detected after the second preset time, the detected exhaust temperature of the compressor is compared with the first maximum value, if the difference value between the first maximum value and the exhaust temperature of the compressor is larger than or equal to the first preset difference value, the fact that the outdoor heat exchanger is frosted is indicated, the heat accumulator needs to accumulate heat, the switch device is controlled to be turned on, and a refrigerant flows through the heat accumulation tube to accumulate heat. If the difference value between the first maximum value and the exhaust temperature of the compressor is smaller than a first preset difference value, the fact that the outdoor heat exchanger is not frosted or the frosting degree is small is indicated, the heat accumulator does not need to accumulate heat, the switch device is controlled to be closed, and the refrigerant does not flow through the heat accumulation pipe.

In one embodiment, the range of the first preset time is 5min to 11min, the range of the second preset time is 11min to 15min, and the range of the first preset difference is 1 ℃ to 3 ℃.

The range of the first preset time is 5-11 min, so that on one hand, the compressor is guaranteed to operate stably, the detected first maximum value is accurate, and on the other hand, the outdoor heat exchanger is guaranteed not to be frosted or not to be frosted seriously, and defrosting is not needed. Further, the first preset time may be, but is not limited to, 5min, 7min, 9min or 11 min.

The range of the second preset time is 11-15 min, the conditions that the second preset time is less than 11min, the air conditioning system is unstable in operation, the obtained first maximum value is inaccurate, and the frosting condition of the outdoor heat exchanger cannot be found timely due to the fact that the time for obtaining the first maximum value is too late when the second preset time is more than 15min are avoided. The second preset time may be 11min, 12min, 13min, 14min or 15 min.

The range of the first preset difference is 1-3 ℃, and the first preset difference is prevented from being smaller than 1 ℃, so that the first preset difference is smaller, and the frosting condition of the outdoor heat exchanger can be judged wrongly; and the situation that the first preset difference is larger than 3 ℃ so that heat accumulation is started only after the outdoor heat exchanger frosts seriously due to the larger first preset difference is avoided. The first preset difference may be, but is not limited to, 1 deg.C, 2 deg.C, or 3 deg.C.

In one embodiment, after controlling the heating device to be turned off, the control method further includes: detecting a second maximum value of the exhaust temperature of the compressor between a third preset time and a fourth preset time when the heating device is turned off; detecting the exhaust temperature of the compressor after a fourth preset moment; if the difference between the second maximum value and the exhaust temperature of the compressor is greater than or equal to a second preset difference, the preset heat storage condition is met; and if the difference value between the second maximum value and the exhaust temperature of the compressor is smaller than the second preset difference value, the preset heat storage condition is not met, and the second maximum value for detecting the exhaust temperature of the compressor between the third preset time and the fourth preset time when the heating device is turned off is returned.

And controlling the heating device to be closed when the fact that heat storage is not needed is judged according to the relation between the difference value between the first maximum value and the exhaust temperature of the compressor and a first preset difference value. Detecting the temperature of a coil of the outdoor heat exchange tube between a third preset time and a fourth preset time after the heating device is closed, acquiring the maximum value (a second maximum value) of the exhaust temperature of the compressor between the third preset time and the fourth preset time, detecting the exhaust temperature of the compressor after the fourth preset time, comparing the detected exhaust temperature of the compressor with the second maximum value, and if the difference value between the second maximum value and the exhaust temperature of the compressor is greater than or equal to the second preset difference value, indicating that the outdoor heat exchanger is frosted, and the heat accumulator needs to accumulate heat, maintaining the starting state of the heating device, and controlling the switching device to be opened to enable a refrigerant to flow through the heat accumulation tube to accumulate heat. If the difference value between the second maximum value and the exhaust temperature of the compressor is smaller than the second preset difference value, the fact that the outdoor heat exchanger is not frosted or the frosting degree is small is indicated, the heating device is controlled to be turned off, the switching device is turned off, and the heat accumulator does not need to accumulate heat, so that controllable heat accumulation is achieved.

Therefore, the frosting condition of the outdoor heat exchanger is judged according to the exhaust temperature of the compressor, whether the heat accumulator needs heat accumulation or not is judged, heat accumulation is not carried out under the working condition that heat accumulation is not needed, and the energy loss of the system is reduced.

In one embodiment, the third preset time is 5min to 11min, the fourth preset time is 11min to 15min, and the second preset difference is 1 ℃ to 3 ℃.

The third preset time is within the range of 5-11 min, if the third preset time is less than 5min, the time for judging whether the outdoor heat exchanger frosts according to the first maximum value is short, the outdoor heat exchanger does not frost or the frosting degree is low, whether the heat accumulator needs to store heat is not required to be judged, and the condition that the frosting condition of the outdoor heat exchanger cannot be found in time due to the fact that the time for obtaining the second maximum value is too late when the third preset time is more than 11min is also avoided. The third preset time may be 5min, 7min, 9min or 11 min.

The range of the fourth preset time is 11-15 min, the fourth preset time is prevented from being smaller than 11min, the time for judging whether the outdoor heat exchanger frosts according to the first maximum value is short, the outdoor heat exchanger does not frost or the frosting degree is low, whether the heat accumulator needs to store heat is not required to be judged, and the condition that the frosting condition of the outdoor heat exchanger cannot be found in time due to the fact that the time for obtaining the second maximum value is too late when the fourth preset time is larger than 15min is also avoided. The fourth preset time may be 11min, 12min, 13min, 14min or 15 min.

The range of the second preset difference value is 1-3 ℃, and the second preset difference value is prevented from being smaller than 1 ℃, so that the second preset difference value is smaller, and the frosting condition of the outdoor heat exchanger can be judged wrongly; and the situation that the second preset difference value is larger than 3 ℃ so that heat accumulation is started only after the outdoor heat exchanger frosts seriously due to the larger second preset difference value is avoided.

In one embodiment, the operating condition parameters include a coil temperature of the indoor heat exchanger, and the operating condition parameters of the air conditioner satisfy a preset heat storage condition, and specifically include: detecting a third maximum value of the coil temperature of the indoor heat exchanger between a fifth preset time and a sixth preset time of starting up heating; detecting the temperature of a coil of the indoor heat exchanger after a sixth preset time; if the difference value between the third maximum value and the coil temperature of the indoor heat exchanger is greater than or equal to a third preset difference value, the preset heat storage condition is met; and if the difference value between the third maximum value and the coil temperature of the indoor heat exchanger is smaller than the third preset difference value, the preset heat storage condition is not met.

When the heating mode is operated, the coil temperature of the outdoor heat exchange tube is detected between a fifth preset time and a sixth preset time after the heating mode is operated, the maximum value (third maximum value) of the coil temperature of the outdoor heat exchanger between the fifth preset time and the sixth preset time is obtained, the coil temperature of the outdoor heat exchanger is detected after the sixth preset time, the detected coil temperature of the outdoor heat exchanger is compared with the third maximum value, if the difference value between the third maximum value and the coil temperature of the outdoor heat exchanger is larger than or equal to the first preset difference value, the outdoor heat exchanger is frosted, the heat accumulator needs to accumulate heat, the switch device is controlled to be turned on, and a refrigerant flows through the heat accumulation tube to accumulate heat. If the difference value between the third maximum value and the coil temperature of the outdoor heat exchanger is smaller than the first preset difference value, the fact that the outdoor heat exchanger is not frosted or the frosting degree is small is indicated, the heat accumulator does not need to accumulate heat, the switch device is controlled to be closed, and the refrigerant does not flow through the heat accumulation pipe.

In one embodiment, the range of the fifth preset time is 5min to 11min, the range of the sixth preset time is 11min to 15min, and the range of the third preset difference is 1 ℃ to 3 ℃.

The range of the fifth preset time is 5-11 min, so that on one hand, the compressor is guaranteed to operate stably, the detected first maximum value is accurate, and on the other hand, the outdoor heat exchanger is guaranteed not to be frosted or not to be frosted seriously, and defrosting is not needed. Further, the fifth preset time may be, but is not limited to, 5min, 7min, 9min or 11 min.

The range of the sixth preset time is 11-15 min, the situation that the frosting condition of the outdoor heat exchanger cannot be found in time due to the fact that the time for obtaining the first maximum value is too late when the second preset time is larger than 15min is avoided, the air conditioning system is unstable in operation and the obtained first maximum value is inaccurate when the second preset time is smaller than 11 min. The sixth preset time may be 11min, 12min, 13min, 14min or 15 min.

The range of the third preset difference is 1-3 ℃, and the third preset difference is prevented from being smaller than 1 ℃, so that the third preset difference is smaller, and the frosting condition of the outdoor heat exchanger can be judged wrongly; and the situation that the third preset difference is larger than 3 ℃ so that heat accumulation is started only after the outdoor heat exchanger frosts seriously due to the larger third preset difference is avoided. The third predetermined difference may be, but is not limited to, 1 deg.C, 2 deg.C, or 3 deg.C.

In one embodiment, after the controlling the heating device is turned off, the controlling method further includes: detecting a fourth maximum value of the coil temperature of the indoor heat exchanger between a seventh preset time and an eighth preset time when the heating device is turned off; detecting the temperature of a coil of the indoor heat exchanger after an eighth preset time; if the difference value between the fourth maximum value and the coil temperature of the indoor heat exchanger is greater than or equal to a fourth preset difference value, the preset heat storage condition is met; and if the difference value between the fourth maximum value and the coil temperature of the indoor heat exchanger is smaller than the fourth preset difference value, the preset heat storage condition is not met, and the fourth maximum value for detecting the coil temperature of the indoor heat exchanger between the seventh preset time and the eighth preset time when the heating device is turned off is returned.

And controlling the heating device to be closed when the situation that heat storage is not needed is judged according to the relation between the difference value between the third maximum value and the temperature of the coil of the outdoor heat exchanger and a third preset difference value. Detecting the coil temperature of the outdoor heat exchange tube between a seventh preset time and an eighth preset time after the heating device is closed, acquiring the maximum value (fourth maximum value) of the coil temperature of the outdoor heat exchanger between the seventh preset time and the eighth preset time, detecting the coil temperature of the outdoor heat exchanger after the eighth preset time, comparing the detected coil temperature of the outdoor heat exchanger with the fourth maximum value, and if the difference value between the fourth maximum value and the coil temperature of the outdoor heat exchanger is greater than or equal to the fourth preset difference value, indicating that the outdoor heat exchanger is frosted, storing heat by the heat accumulator, maintaining the opening state of the heating device, and controlling the switching device to be opened to enable a refrigerant to flow through the heat storage tube to store heat. If the difference value between the fourth maximum value and the coil temperature of the outdoor heat exchanger is smaller than the fourth preset difference value, the fact that the outdoor heat exchanger is not frosted or the frosting degree is small is indicated, the heating device is controlled to be turned off, the switching device is controlled to be turned off, and the heat accumulator does not need to accumulate heat, so that controllable heat accumulation is achieved.

Therefore, the frosting condition of the outdoor heat exchanger is judged according to the temperature of the coil pipe of the outdoor heat exchanger, whether the heat accumulator needs heat accumulation or not is judged, heat accumulation is not carried out under the working condition that heat accumulation is not needed, and the energy loss of the system is reduced.

In one embodiment, the range of the seventh preset time is 5min to 11min, the range of the eighth preset time is 11min to 15min, and the range of the fourth preset difference is 1 ℃ to 3 ℃.

The range of the seventh preset time is 5-11 min, if the seventh preset time is less than 5min, the time for judging whether the outdoor heat exchanger frosts according to the first maximum value is short, the outdoor heat exchanger does not frost or the frosting degree is low, whether the heat accumulator needs to store heat is not required to be judged, and the condition that the frosting condition of the outdoor heat exchanger cannot be found in time due to the fact that the time for obtaining the second maximum value is too late when the seventh preset time is more than 11min is avoided. The seventh preset time may be 5min, 7min, 9min or 11 min.

The range of the eighth preset time is 11-15 min, the eighth preset time is prevented from being smaller than 11min, the time for judging whether the outdoor heat exchanger frosts according to the first maximum value is short, the outdoor heat exchanger does not frost or the frosting degree is low, whether the heat accumulator needs to store heat is not required to be judged, and the condition that the frosting condition of the outdoor heat exchanger cannot be found in time due to the fact that the time for obtaining the second maximum value is too late when the eighth preset time is larger than 15min is also avoided. The eighth preset time may be 11min, 12min, 13min, 14min or 15 min.

The range of the fourth preset difference is 1-3 ℃, and the fourth preset difference is prevented from being smaller than 1 ℃, so that the fourth preset difference is smaller, and the frosting condition of the outdoor heat exchanger can be judged wrongly; and the situation that the fourth preset difference is larger than 3 ℃ so that heat accumulation is started only after the outdoor heat exchanger frosts seriously due to the larger fourth preset difference is avoided.

In one embodiment, the heat accumulator includes a heat exchange tube, the air conditioner includes a reversing element disposed between a third port and an air inlet, the reversing element includes a first connection port to a third connection port, the first connection port is connected to the third port, the second connection port is connected to the air inlet through a connection pipeline, one end of the heat exchange tube is connected to the third connection port, and the heat exchange tube is connected in parallel to the connection pipeline, the control method includes: and under the heating mode, the defrosting is judged to be needed, the switching device is controlled to be closed, and the first connecting port is controlled to be communicated with the third connecting port, so that the refrigerant flows through the heat exchange tube until a preset defrosting ending condition is met.

When the defrosting is needed, the switch device is controlled to be closed, the heat storage pipe is disconnected, and the heat storage device stops storing heat.

The first connecting port is communicated with the third connecting port, the refrigerant is controlled to flow through the heat exchange tube, the refrigerant is evaporated in the heat exchange tube to absorb heat, and is condensed in the outdoor heat exchanger to release heat, so that defrosting of the outdoor heat exchanger is realized.

In one embodiment, the preset defrosting end condition includes that the coil temperature of the outdoor heat exchanger is higher than a first preset temperature, or the coil temperature of the outdoor heat exchanger is higher than a second preset temperature within a preset time period, wherein the first preset temperature is higher than the second preset temperature.

The temperature of the coil of the outdoor heat exchanger is higher than a first preset temperature, which indicates that defrosting of the outdoor heat exchanger is completed, and the defrosting mode can be exited. Or the temperature of the coil of the outdoor heat exchanger is greater than a second smaller preset temperature within a preset time, which also indicates that defrosting of the outdoor heat exchanger is completed, and the defrosting mode can be exited.

Whether defrosting is finished or not is judged according to the temperature of the coil of the outdoor heat exchanger, and the defrosting method is simple and reliable. It is understood that whether defrosting is finished or not may be judged by judging the discharge temperature of the compressor.

In one embodiment, the first preset temperature is 6-12 ℃, the second preset temperature is 3-8 ℃, and the preset duration is 20-60 seconds.

The first preset temperature is in the range of 6-12 ℃, the first preset temperature is prevented from being smaller than 6 ℃, the defrosting effect of the outdoor heat exchanger is poor, and the first preset temperature is also prevented from being larger than 12 ℃, so that the defrosting mode is operated after the defrosting of the outdoor heat exchanger is finished, and the energy waste of the system is caused. The first preset temperature may be, but is not limited to, 6 ℃, 8 ℃, 10 ℃ or 12 ℃.

The second preset temperature is in a range of 3-8 ℃, the second preset temperature is prevented from being lower than 3 ℃, the defrosting effect of the outdoor heat exchanger is poor, and the second preset temperature is also prevented from being higher than 8 ℃, so that the outdoor heat exchanger still operates in a defrosting mode after defrosting is finished, and the energy waste of the system is caused. The second preset temperature may be, but is not limited to, 3 ℃, 6 ℃, or 8 ℃.

The preset time is within the range of 20 s-60 s, the condition that the defrosting effect of the outdoor heat exchanger is poor due to the fact that the preset time is less than 20s is avoided, and the condition that the defrosting mode is operated after the defrosting of the outdoor heat exchanger is finished due to the fact that the preset time is more than 60s, and the energy waste of the system is caused. The preset time period may be, but is not limited to, 20s, 40s, or 60 s.

In one embodiment, in the heating mode, it is determined that defrosting is required, the switching device is controlled to be turned off, and the first connection port is controlled to be communicated with the third connection port, and the method further includes: and controlling the heating device to be started.

When the defrosting is carried out, the refrigerant evaporates and absorbs heat in the heat exchange tube, so that the temperature of the heat accumulator is reduced. Therefore, the heating device is started in the defrosting mode, the heat accumulator is heated through the heating device, the temperature of the heat accumulator is increased, the cooling amplitude of the heat accumulator caused by the temperature reduction of the refrigerant flowing through the heat exchange tube is reduced, the heat accumulator stores enough heat, the defrosting efficiency and the defrosting effect are further ensured, and the discomfort brought to users due to the fact that the indoor temperature is reduced quickly and the indoor temperature fluctuates greatly due to long-time defrosting in the prior art is prevented.

A third aspect of the present invention provides a control device, including a processor and a memory, wherein the processor is configured to implement the steps of the method for controlling an air conditioner according to any one of the second aspect when executing a computer program stored in the memory.

A fourth aspect of the present invention provides an air conditioner, including: the control device for an air conditioner according to the third aspect.

An aspect of a fifth aspect of the present invention provides a computer-readable storage medium having stored thereon a computer program that, when executed by a processor, implements the steps of the control method of an air conditioner according to any one of the aspects of the second aspect.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention, in which solid arrows indicate a flow direction of a refrigerant in a cooling mode, and hollow arrows indicate a flow direction of a check valve;

fig. 2 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention, in which solid arrows indicate a flow direction of a refrigerant in a heating mode, and hollow arrows indicate a flow direction of a check valve;

fig. 3 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention, in which solid arrows indicate a flow direction of a refrigerant in a heat storage state, and hollow arrows indicate a flow direction of a check valve;

fig. 4 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention, in which solid arrows indicate a flow direction of a refrigerant in a defrosting mode, and hollow arrows indicate a flow direction of a check valve;

FIG. 5 is a flow chart illustrating a control method according to an embodiment of the present invention;

FIG. 6 is a flow chart illustrating a control method according to an embodiment of the present invention;

FIG. 7 is a flow chart illustrating a control method according to an embodiment of the present invention;

FIG. 8 is a flow chart illustrating a control method according to an embodiment of the present invention;

FIG. 9 is a flow chart illustrating a control method according to an embodiment of the present invention;

fig. 10 is a schematic block diagram of a control device according to an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 10 is:

the system comprises a compressor, an 11 exhaust port, a 12 air inlet, a 2 reversing structure, a 21 first port, a 22 second port, a 23 third port, a 24 fourth port, a 3 outdoor heat exchanger, a 4 indoor heat exchanger, a 5 heat accumulator, a 51 heat accumulation pipe, a 52 heat exchange pipe, a 53 heating device, a 54 temperature detection device, a 55 second throttling component, a 6 reversing element, an e first connecting port, an f second connecting port, a g third connecting port, a 7 switching device, a 71 one-way valve, a 72 electromagnetic valve, an 8 first throttling component, a 81 heating throttling component, a 82 refrigerating throttling component, an 83 switching structure, a 10 bypass pipeline, a 20 communicating pipeline, a 30 connecting pipeline, a 200 control device, a 204 storage and a 206 processor.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.

An air conditioner, a control method thereof, a control device 200, and a computer-readable storage medium according to some embodiments of the present invention are described below with reference to fig. 1 to 10 of the accompanying drawings.

The air conditioner comprises a compressor 1, a reversing structure 2, an outdoor heat exchanger 3, an indoor heat exchanger 4, a heat accumulator 5 and a reversing piece 6.

The compressor 1 includes an exhaust port 11 and an intake port 12.

The reversing structure 2 includes first to fourth ports 21 to 24, one of the second and

fourth ports

22 and 24 is communicated with the first port 21, the other of the second and

fourth ports

22 and 24 is communicated with the third port 23, the first port 21 is connected to the exhaust port 11, the second port 22 is connected to the first end of the outdoor heat exchanger 3, and the fourth port 24 is connected to the first end of the indoor heat exchanger 4. The reversing structure 2 may be a four-way valve.

The heat accumulator 5 comprises a heat accumulation pipe 51 and a heat exchange pipe 52, the heat accumulation pipe 51 is connected with the indoor heat exchanger 4 in parallel, and the heat accumulation pipe 51 is connected with a switch device 7 for controlling the on-off of the heat accumulation pipe 51.

The direction changing member 6 includes a first connection port e selectively communicated with one of a second connection port f and a third connection port g, the first connection port e is connected with the third connection port 23, the second connection port f is connected with the gas inlet 12 through the connection pipe 30, the third connection port g is connected with one end of the heat exchange pipe 52, and the heat exchange pipe 52 is connected in parallel with the connection pipe 30.

The reversing piece can be a three-way valve, or the reversing piece comprises a first valve and a second valve, the first valve is connected between the third port 23 and the air inlet 12 in series, the second valve is arranged on the heat exchange pipe 52, the heat exchange pipe 52 is connected with the first valve in parallel, one interface of the first valve forms a first connecting port e, one interface of the second valve forms a third connecting port g, and the other interface of the first valve and the other interface of the second valve form a first connecting port e together.

According to the air conditioner provided by the technical scheme of the invention, in the heating mode, when the defrosting is judged not to be needed, the heat accumulator 5 is subjected to heat accumulation. During heat storage, the switching device 7 is opened, and the refrigerant flows through the heat storage pipe 51 to store heat.

And in the heating mode, when the defrosting is needed, entering a defrosting mode. In the defrosting mode, the first connection port e is communicated with the third connection port g, the refrigerant discharged from the exhaust port 11 of the compressor 1 flows into the outdoor heat exchanger 3 through the indoor heat exchanger 4, the refrigerant releases heat in the outdoor heat exchanger 3 to defrost, the refrigerant flows into the heat exchange tube 52 through the first connection port e and the third connection port g after defrosting, and the refrigerant evaporates in the heat accumulator 5 and flows back to the air inlet 12 of the compressor 1.

In the defrosting mode, the reversing structure 2 does not reverse, can continuously supply heat to the indoor, does not influence the heating of the air conditioner, and does not influence the comfort of users; the refrigerant flows through the heat storage pipe 51 to store heat, so that the problem of insufficient heat storage of the heat accumulator 5 is avoided, the defrosting time is shortened, and the defrosting is clean; the on-off of the heat storage pipe 51 is controlled by controlling the on-off of the switch device 7, so that controllable heat storage is realized, the switch device 7 can be controlled to be closed under the working condition that heat storage is not needed, heat is not stored, and energy loss is reduced.

In one embodiment, the air conditioner further includes a first throttling part 8 and a bypass line 10.

A communication pipeline 20 is connected between a confluence point of the second end of the indoor heat exchanger 4 and the other end of the heat storage pipe 51 and the second end of the outdoor heat exchanger 3, and the first throttling part 8 is connected in series on the communication pipeline 20.

The bypass pipeline 10 is connected in parallel with the first throttling component 8, and a switch structure 83 for controlling the on-off of the bypass pipeline 10 is arranged on the bypass pipeline 10.

The switch structure 83 is opened to turn on the bypass line 10, and the switch structure 83 is closed to turn off the bypass line 10. The bypass pipeline 10 and the switch structure 83 are arranged to enable the refrigerant to selectively flow through the first throttling component 8 and the bypass pipeline 10, so as to control the heat exchange condition (whether condensation or evaporation) of the refrigerant in the outdoor heat exchanger 3.

Specifically, as shown in fig. 1, in the cooling mode, the switch structure 83 is closed, the bypass line 10 is disconnected, and the refrigerant flows through the first throttling part 8 and is condensed in the outdoor heat exchanger 3. As shown in fig. 2, in the heating mode, the switch structure 83 is closed, the bypass line 10 is disconnected, and the refrigerant flows through the first throttling part 8 and evaporates in the outdoor heat exchanger 3. As shown in fig. 3, when the accumulator 5 accumulates heat, the switching mechanism 83 is closed, the bypass line 10 is disconnected, and the refrigerant flows through the first throttling member 8 and evaporates in the outdoor heat exchanger 3. As shown in fig. 4, in the defrosting mode, the switch structure 83 is turned on, the bypass pipeline 10 is conducted, and the refrigerant flows through the bypass pipeline 10 and is condensed in the outdoor heat exchanger 3 to achieve defrosting.

The switch structure 83 may be a solenoid valve, and specifically, the solenoid valve may be a one-way solenoid valve or a two-way solenoid valve.

In a specific embodiment, the first throttling element 8 includes a cooling throttling element 82 and a heating throttling element 81 connected in series, the heating throttling element 81 is connected in parallel with the bypass pipeline 10, the cooling throttling element 82 is configured to perform throttling in a cooling mode, the heating mode is in one-way conduction along a direction from the second end of the indoor heat exchanger 4 to the second end of the outdoor heat exchanger 3, the heating throttling element 81 is configured to perform throttling in a heating mode, and the cooling mode is in one-way conduction along a direction from the second end of the outdoor heat exchanger 3 to the second end of the indoor heat exchanger 4.

In the defrosting mode, the control switch structure 83 is turned on, the bypass pipeline 10 is conducted, the refrigerant flows out from the second end of the indoor heat exchanger 4, then flows through the refrigeration throttling component 82 and the bypass pipeline 10, and enters the outdoor heat exchanger 3, and the refrigeration throttling component 82 does not have a throttling function on the refrigerant, so that the refrigerant flowing out from the second end of the indoor heat exchanger 4 does not throttle when flowing into the outdoor heat exchanger 3, and is condensed in the outdoor heat exchanger 3 to release heat, and defrosting is performed on the outdoor heat exchanger 3.

The cooling throttling part 82 throttles in the cooling mode, i.e., in the flow direction from the second end of the outdoor heat exchanger 3 to the second end of the indoor heat exchanger 4, and is completely conducted in the direction from the second end of the indoor heat exchanger 4 to the second end of the outdoor heat exchanger 33 in the heating mode, and has no throttling effect. The heating throttle member 81 throttles in the heating mode, i.e., throttles in the flow direction from the second end of the indoor heat exchanger 4 to the second end of the outdoor heat exchanger 3, and is completely conducted in the direction from the second end of the outdoor heat exchanger 3 to the second end of the indoor heat exchanger 4 in the cooling mode, and does not have a throttling effect. The cooling throttle 82 and the heating throttle 81 may be throttle valves.

It is understood that the bypass line 10 may also be connected in parallel with the entire first throttling element 8, i.e. the cooling throttling element 82 and the heating throttling element 81 are connected in parallel with the bypass line 10 as a whole.

In another specific embodiment, the first throttling component 8 comprises a throttling component body with a throttling function and a switch connected with the throttling component body in series, and the switch is used for controlling the on-off of a pipeline where the throttling component body is located.

In the case where the first throttling member 8 includes a throttling member body and a switch, if the refrigerant flowing out from the second end of the indoor heat exchanger 4 flows into the outdoor heat exchanger 3, the refrigerant does not pass through the first throttling portion for throttling, but flows through the bypass line 10, so that the refrigerant can be condensed in the outdoor heat exchanger 3 to release heat, thereby defrosting the outdoor heat exchanger 3. If the refrigerant flowing out of the second end of the indoor heat exchanger 4 flows into the outdoor heat exchanger 3 through the first throttling part 8, the refrigerant evaporates and absorbs heat in the outdoor heat exchanger 3. The switch can be an electromagnetic valve, the electromagnetic valve can be a one-way electromagnetic valve or a two-way electromagnetic valve, and the throttling component body can be an electronic expansion valve, a two-way throttling valve, a capillary tube or a thermal expansion valve.

In a specific embodiment, the switching device 7 includes a check valve 71 and a solenoid valve 72, and the check valve 71 and the solenoid valve 72 are connected in series with the heat storage pipe 51, and the check valve 71 is in one-way communication in a direction from the fourth port 24 to the heat storage pipe 51.

The check valve 71 is in one-way conduction along the direction from the fourth port 24 to the heat storage pipe 51, so that the refrigerant flowing out of the second end of the outdoor heat exchanger 3 in the refrigeration mode cannot pass through the check valve 71, the refrigerant cannot flow through the heat storage pipe 51, the temperature of the heat accumulator 5 is prevented from being reduced due to the fact that the refrigerant flows into the heat storage pipe 51, the electromagnetic valve 72 can control the on-off of the heat storage pipe 51 where the electromagnetic valve 72 is located, the electromagnetic valve 72 is opened, the heat storage pipe 51 is in conduction, the refrigerant can flow through the heat storage pipe 51 in the heating mode. The solenoid valve 72 may be a one-way solenoid shut-off valve or a two-way solenoid shut-off valve.

Further, the electromagnetic valve 72 is a one-way electromagnetic cut-off valve that opens to communicate in the direction from the fourth port 24 to the heat storage pipe 51. The switching device 7 includes the check valve 71, and the control program of the air conditioner can be simplified.

In another specific embodiment, the switching device 7 includes a two-way electromagnetic shutoff valve, which is connected in series with the heat storage pipe 51.

The bidirectional electromagnetic cut-off valve is connected in series with the heat storage pipe 51 and used for controlling the on-off of the heat storage pipe 51, when the bidirectional electromagnetic cut-off valve is opened, the heat storage pipe 51 is switched on, the refrigerant can flow through the heat storage pipe 51, when the bidirectional electromagnetic cut-off valve is closed, the heat storage pipe 51 is switched off, the refrigerant cannot flow through the heat storage pipe 51, and therefore the state of the heat accumulator 5 can be selectively controlled.

In one embodiment, a second throttling part 55 is connected in series between the third connecting port g and one end of the heat exchange pipe 52.

And in the defrosting mode, the first connecting port e is controlled to be communicated with the third connecting port g, and the refrigerant flowing out of the outdoor heat exchanger 3 enters the heat exchange tube 52 through the first connecting port e, the third connecting port g and the second throttling component 55 after passing through the reversing structure 2. The second throttling part 55 throttles the refrigerant so that the refrigerant can be evaporated in the heat exchange tube 52 and then flows back to the air inlet 12 of the compressor 1.

The second throttling part 55 may be a capillary tube, an electronic expansion valve, a thermal expansion valve, or a throttle valve.

In one of the embodiments, the thermal accumulator 5 includes a thermal storage cavity in which at least part of the thermal storage tube 51 and the heat exchange tube 52 are located, and the thermal storage cavity is filled with a thermal storage material including a phase change material.

At least parts of the heat storage pipe 51 and the heat exchange pipe 52 are arranged in a heat storage cavity of the heat accumulator 5, so that the first heat exchanger and the second heat exchanger can be protected to a certain extent, and the heat accumulator 5 is in a stable state in the working process of the air conditioner. The heat storage cavity is filled with a heat storage material, and heat storage and heat release of the heat accumulator 5 are realized by utilizing the phase change of the heat storage material.

The heat storage material is made of a phase-change material, and the physical property of the phase-change material is utilized to change the physical form of the phase-change material so as to absorb or release heat. The air conditioner of the invention stores heat in the heat accumulator 5 by arranging a certain amount of phase-change materials in the heat accumulator 5, and the phase-change materials change in shape and release heat to accelerate defrosting in the defrosting process.

In one embodiment, the phase change temperature of the heat storage material is less than or equal to 35 ℃, and the phase change temperature of the heat storage material is lower, so that when the temperature of the refrigerant is lower, the refrigerant passes through the heat storage pipe 51, and the heat accumulator 5 can still store heat.

The heat storage material comprises at least one of water, paraffin, ethylene glycol aqueous solution and disodium hydrogen phosphate dodecahydrate, and a better phase change material can be selected according to the actual application situation in specific application.

In one embodiment, a temperature detection device 54 is provided in the heat accumulator 5.

The temperature detection means 54 is for detecting the temperature of the thermal accumulator 5, and further, the temperature detection means 54 is for detecting the temperature of the thermal storage material. Whether the heat accumulator 5 needs heat accumulation is judged by detecting the temperature of the heat accumulator 5, so that the controllable heat accumulation of the heat accumulator 5 is realized.

The invention provides an air conditioner, a heat storage defrosting air conditioning system, which comprises a compressor 1, a reversing structure 2, an outdoor heat exchanger 3, a heating throttle valve (a heating throttle part 81), a refrigerating throttle valve (a refrigerating throttle part 82), an indoor heat exchanger 4, a switch structure 83 connected with the heating throttle valve in parallel and a heat accumulator 5. The parts are connected by pipelines. The heat storage pipe 51 is connected in parallel with the indoor heat exchanger 4, and the heat exchange pipe 52 is connected in parallel with the connection pipe 30 through the direction changer 6. The flow of the refrigerant in the different working modes of the air conditioner will be described below by taking the reversing structure 2 as a four-way valve, the reversing member 6 as a three-way valve, the refrigerating throttle member 82 as a refrigerating throttle valve, the heating throttle member 81 as a heating throttle valve, and the switching device 7 including the solenoid valve 72 and the check valve 71 as examples.

The refrigerant flow in the cooling mode is as shown in fig. 1, the compressor 1 compresses the refrigerant into high-temperature high-pressure gas, the refrigerant is connected to the outdoor heat exchanger 3 through the ab port (a is the first port 21, b is the second port 22) of the four-way valve to be condensed into medium-temperature high-pressure liquid refrigerant, the refrigerant is throttled by the cooling throttle valve to be evaporated and absorbed by the indoor heat exchanger 4, and then the refrigerant is connected through the cd port (c is the fourth port 24, d is the third port 23) of the four-way valve and returns to the compressor 1 through the connecting port ef (e is the first connecting port e, f is the second connecting port f) of the three-way valve, wherein the connecting port ef is communicated when the three-way valve is set to 0 step, the connecting port eg is communicated when the three-way valve is set to 608 step (e is the first connecting port e, g is the third connecting port g, the opening degree of the reversing piece 6 is 0 step.

As shown in fig. 2, the refrigerant flow in the heating mode is that the compressor 1 compresses the refrigerant into high-temperature and high-pressure gas, the gas is condensed into medium-temperature and high-pressure liquid in the indoor heat exchanger 4 through an ac port (a is a first port 21, c is a fourth port 24) of the four-way valve, the liquid is heated and absorbed by the outdoor condenser through the heating throttle valve, and finally the liquid returns to the compressor 1 through a bd port (b is a second port 22, d is a third port 23) of the four-way valve and an ef connection port (e is a first connection port e, f is a second connection port f) of the three-way valve, wherein the compressor 1 is turned on, the reversing structure 2 is powered on, the outdoor fan is turned on, the switch structure 83 is turned off.

As shown in fig. 3, the refrigerant flow of the heat storage process in the heating mode is that the compressor 1 compresses the refrigerant into a high-temperature and high-pressure gas, and the gas passes through the ac port (a is the first port 21, and c is the fourth port 24) of the four-way valve. A part of refrigerant enters the indoor heat exchanger 4 to be condensed into medium-temperature high-pressure liquid, a part of refrigerant enters the heat accumulator 5 through the one-way valve 71 to heat a heat storage material, and is converged with the refrigerant passing through the indoor heat exchanger 4 through the electromagnetic valve 728, and then passes through the heating throttle valve to the outdoor heat exchanger 3 to absorb heat, and finally returns to the compressor 1 through a bd port (b is a second port 22, d is a third port 23) of the four-way valve and a ef connector (e is a first connector e, f is a second connector f), wherein the compressor 1 is opened, the reversing structure 2 is powered on, the outdoor fan is opened, the switch structure 83 is closed, the electromagnetic valve 72 (the electromagnetic valve 72) is opened, and the opening degree of the reversing piece.

The flow of the refrigerant during defrosting is shown in fig. 4, the compressor 1 converts the refrigerant into high-temperature and high-pressure gas, the high-temperature and high-pressure gas passes through the ac port (a is the first port 21, c is the fourth port 24) of the four-way valve to be condensed into medium-temperature and high-pressure liquid in the indoor heat exchanger 4, the medium-temperature and high-pressure liquid passes through the switch structure 83 and then enters the outdoor heat exchanger 3 to release heat, the outdoor heat exchanger 3 is defrosted, throttled by a second throttling part 55 to enter the heat accumulator 5 for evaporation through a four-way valve bd port (b is a second port 22, d is a third port 23) and a three-way valve eg connector (e is a first connector e, g is a third connector g), and finally returned to the compressor 1, wherein, the indoor electric heater is turned on, the compressor 1 is turned on, the reversing structure 2 is powered on, the outdoor fan is turned off, the switch structure 83 is turned on, the electromagnetic valve 72 is turned off, the opening degree of the reversing piece 6 is in 608 steps, wherein the defrosting mode is shown as lasting for 4min to the maximum. The indoor electric heater is started to improve the indoor temperature, and the reduction of the indoor temperature caused by defrosting is avoided.

The air conditioner further includes a heating device 53 provided on the heat accumulator for heating the heat accumulator.

Set up heating device 53, heat the heat accumulator through heating device 53, improve the heat accumulation speed of heat accumulator to further reduce the time of changing the frost, improve and change white efficiency, and make and change the frost clean, avoid the not enough condition of heat accumulator heat accumulation to take place.

An aspect of a second aspect of the present invention provides a control method of an air conditioner for controlling the air conditioner according to any one of the aspects of the first aspect.

As shown in fig. 5, the control method includes:

step S502, starting up to heat, and controlling the heating device 53 to be started so as to heat the heat accumulator;

step S504 is executed to control the switching device 7 to be turned on and maintain the on state of the heating device 53, so as to turn on the heat storage pipe, when the operating condition parameters of the air conditioner satisfy the preset heat storage conditions.

According to the control method provided by the technical scheme of the second aspect of the invention, in the heating mode, whether the heat accumulator needs heat accumulation is judged according to the working condition parameters of the air conditioner, and when the heat accumulator needs heat accumulation, the switch device 7 is started, and the heat accumulation pipe is conducted, so that the heat accumulation of the heat accumulator is realized. Thereby realizing controllable heat storage and reducing the energy loss of the air conditioning system.

Set up heating device 53, when the start heats, start heating device 53, heat the heat accumulator through heating device 53, improve the heat accumulation speed of heat accumulator to further reduce the time of defrosting, improve and change white efficiency, and make and change the frost clean, avoid the not enough condition of heat accumulator heat accumulation to take place.

And starting the air conditioner for heating, controlling the heating device 53 to be closed when the working condition parameters of the air conditioner do not meet the preset heat storage conditions.

When the working condition parameters of the air conditioner do not meet the preset heat storage conditions, it is indicated that the outdoor heat exchanger does not have the risk of frosting, and the heat accumulator does not need to store heat, so that the heating device 53 is closed, and the energy consumption of the system is reduced.

The first embodiment is as follows:

as shown in fig. 6, the control method includes:

step S602, detecting a starting operation mode, wherein the starting operation mode comprises a refrigeration mode and a heating mode;

running a heating mode, executing step S604, controlling the heating device 53 to be turned on to heat the heat accumulator;

step S606, detecting a first maximum value of the exhaust temperature of the compressor between a first preset time and a second preset time of starting heating;

step S608, detecting the exhaust temperature of the compressor after a second preset time;

step S610, judging whether the difference value between the first maximum value and the exhaust temperature of the compressor is greater than or equal to a first preset difference value;

if yes, the preset heat storage condition is met, step S612 is executed, the switch device 7 is controlled to be turned on, and the on state of the heating device 53 is maintained, so that the heat storage pipe is conducted to store heat;

if not, the preset heat storage condition is not satisfied, and step S614 is executed to control the heating device 53 to be turned off.

When the heating mode is operated, the temperature of a coil of the outdoor heat exchange tube is detected between a first preset time and a second preset time after the heating mode is operated, the maximum value (first maximum value) of the exhaust temperature of the compressor between the first preset time and the second preset time is obtained, the exhaust temperature of the compressor is detected after the second preset time, the detected exhaust temperature of the compressor is compared with the first maximum value, if the difference value between the first maximum value and the exhaust temperature of the compressor is larger than or equal to the first preset difference value, the frosting of the outdoor heat exchanger is indicated, the heat accumulator needs to accumulate heat, the switch device 7 is controlled to be opened, and a refrigerant flows through the heat accumulation tube to accumulate heat. If the difference value between the first maximum value and the exhaust temperature of the compressor is smaller than a first preset difference value, it is indicated that the outdoor heat exchanger is not frosted or the frosting degree is very small, the heat accumulator does not need to accumulate heat, the switch device 7 is controlled to be closed, and the refrigerant does not flow through the heat accumulation pipe.

In one embodiment, the first preset time is 5min to 11min, the second preset time is 11min to 15min, and the first preset difference is 1 ℃ to 3 ℃.

In one embodiment, after the step S614 turns off the heating device 53, the control method further includes:

step S616, detecting a second maximum value of the discharge temperature of the compressor between the third preset time and the fourth preset time when the heating device 53 is turned off;

step 618, detecting the exhaust temperature of the compressor after a fourth preset time;

step S620, judging whether the difference value between the second maximum value and the exhaust temperature of the compressor is greater than or equal to a second preset difference value or not;

if not, the preset heat storage condition is not met, and the process returns to the step S614.

When it is determined that heat storage is not required based on the relationship between the difference between the first maximum value and the discharge temperature of the compressor and the first preset difference, the heating device 53 is controlled to be turned off. After the heating device 53 is turned off, the coil temperature of the outdoor heat exchange tube is detected between a third preset time and a fourth preset time, the maximum value (a second maximum value) of the exhaust temperature of the compressor between the third preset time and the fourth preset time is obtained, after the fourth preset time, the exhaust temperature of the compressor is detected, the detected exhaust temperature of the compressor is compared with the second maximum value, if the difference value between the second maximum value and the exhaust temperature of the compressor is larger than or equal to the second preset difference value, it is indicated that the outdoor heat exchanger is frosted, the heat accumulator needs to accumulate heat, the on state of the heating device 53 is maintained, and the switching device 7 is controlled to be turned on, so that a refrigerant flows through the heat accumulation tube to accumulate heat. If the difference between the second maximum value and the exhaust temperature of the compressor is smaller than the second preset difference, it is indicated that the outdoor heat exchanger is not frosted or the frosting degree is very small, the heating device 53 is controlled to be turned off, the switching device 7 is turned off, and the heat accumulator does not need to accumulate heat, so that controllable heat accumulation is realized.

In one embodiment, the heat accumulator includes a heat exchange tube, the air conditioner includes a reversing element arranged between a third port and an air inlet, the reversing element includes a first connecting port and a third connecting port, the first connecting port is connected with the third port, the second connecting port is connected with the air inlet through a connecting pipeline, one end of the heat exchange tube is connected with the third connecting port, the heat exchange tube is connected with the connecting pipeline in parallel, and the control method includes:

step S622, judging whether defrosting is needed or not in the heating mode;

if the defrosting is needed, executing step S624, controlling the switch device 7 to close, and controlling the first connection port to communicate with the third connection port, so that the refrigerant flows through the heat exchange tube to defrost;

if yes, returning to the step S612;

step S626, judging whether preset defrosting ending conditions are met;

if the preset defrosting condition is met, executing step S628, exiting the defrosting mode, controlling the first connection port to be communicated with the second connection port, controlling the switch structure to be closed, and returning to step S604;

and if the preset defrosting condition is not met, returning to the step S624.

When the defrosting is judged to be needed, the control switch device 7 is closed, the heat storage pipe is disconnected, and the heat storage device stops storing heat.

In one embodiment, in the heating mode, it is determined that defrosting is required, the switch device 7 is controlled to be turned off, and the first connection port and the third connection port are controlled to be communicated with each other, further including: the heating device 53 is controlled to be turned on.

When the defrosting is carried out, the refrigerant evaporates and absorbs heat in the heat exchange tube, so that the temperature of the heat accumulator is reduced. Therefore, the heating device 53 is started in the defrosting mode, and the heat accumulator is heated by the heating device 53, so that the temperature of the heat accumulator is increased, the cooling amplitude of the heat accumulator caused by the temperature reduction of the refrigerant flowing through the heat exchange tube is reduced, the heat accumulator stores enough heat, the defrosting efficiency and the defrosting effect are further ensured, and the discomfort brought to users due to the fact that the indoor temperature is reduced quickly and the indoor temperature fluctuates greatly due to long-time defrosting in the prior art is prevented.

If the vehicle is turned on for cooling, step S632 is executed to control the switch device 7 to be turned off.

In the refrigeration mode, the outdoor heat exchanger does not frost, and heat storage is not needed at the moment, so that controllable heat storage is realized. Further, in the cooling mode, the heating device 53 is controlled to be turned off.

As shown in fig. 7, in a specific embodiment, the switching device 7 includes a check valve 71 and a solenoid valve 72, and the control method includes steps S702 to S722.

Step S702, detecting a starting mode;

if the mode is the refrigeration mode, step S722 is executed, the electromagnetic valve 72 is closed, and at this time, the heat storage pipe of the heat accumulator is disconnected, no high-temperature and high-pressure refrigerant passes through, and no heat is stored;

if the heating mode is selected, step S704 is executed, the electromagnetic valve 72 is closed, and the heating device 53 is opened;

step S706, detecting the maximum value TP0 of the exhaust temperature TP of the compressor in a time period from t1 to t2, wherein for example, the time t1 can be the time 7min away from the startup heating, and the time t2 can be the time 12min away from the startup heating;

step S708, detecting the real-time TP temperature;

step S710, detecting whether real-time TP0-TP ≥ △ TP is true, for example △ TP may be 3 ℃;

if TP0-TP is more than or equal to △ TP, the frosting of the outdoor heat exchanger is indicated, step S712 is executed, the electromagnetic valve 72 and the heating device 53 are opened, and the heat accumulator starts to accumulate heat;

after step S722, returning to step S706, when step S706 is executed this time, t1 and t2 are times away from the closing of the heating device 53 in step S722, for example, time t1 may be a time away from the closing of the heating device 53 in step S722 for 7min, and time t2 may be a time away from the closing of the heating device 53 in step S722 for 12 min;

step S714, detecting whether defrosting is needed;

if yes, executing step S716, entering a defrosting mode to defrost;

if the defrosting is not needed, returning to the step S712 to continue storing heat;

step S718, detecting whether the coil temperature T5 of the real-time outdoor heat exchanger is more than or equal to T50 or T5 is more than or equal to T51 for T3 time, for example, T50 can be 8 ℃, T51 can be 6 ℃, and T3 can be 40S;

if yes, go to step S720, exit the defrosting mode;

if not, the process returns to step S716.

Example two:

as shown in fig. 8, the control method includes:

step S802, detecting a starting operation mode, wherein the starting operation mode comprises a refrigeration mode and a heating mode;

operating a heating mode, executing step S804, controlling the heating device 53 to be turned on to heat the heat accumulator;

step 806, detecting a third maximum value of the coil temperature of the indoor heat exchanger between a fifth preset time and a sixth preset time of starting up and heating;

step S808, detecting the coil temperature of the indoor heat exchanger after a sixth preset time;

step S810, judging whether the difference value between the third maximum value and the coil temperature of the indoor heat exchanger is larger than or equal to a third preset difference value or not;

if yes, the preset heat storage condition is met, step S812 is executed, the switch device 7 is controlled to be turned on, and the on state of the heating device 53 is maintained, so that the heat storage pipe is conducted to store heat;

if not, the preset heat storage condition is not satisfied, and step S814 is executed to control the heating device 53 to turn off.

When the heating mode is operated, the coil temperature of the outdoor heat exchange tube is detected between a fifth preset time and a sixth preset time after the heating mode is operated, the maximum value (third maximum value) of the coil temperature of the outdoor heat exchanger between the fifth preset time and the sixth preset time is obtained, the coil temperature of the outdoor heat exchanger is detected after the sixth preset time, the detected coil temperature of the outdoor heat exchanger is compared with the third maximum value, if the difference value between the third maximum value and the coil temperature of the outdoor heat exchanger is larger than or equal to the first preset difference value, the outdoor heat exchanger is frosted, the heat accumulator needs to accumulate heat, the switch device 7 is controlled to be opened, and a refrigerant flows through the heat accumulation tube to accumulate heat. If the difference between the third maximum value and the coil temperature of the outdoor heat exchanger is smaller than the first preset difference, it is indicated that the outdoor heat exchanger is not frosted or the frosting degree is very small, the heat accumulator does not need to accumulate heat, the switch device 7 is controlled to be closed, and the refrigerant does not flow through the heat accumulation pipe.

In one embodiment, after the step S814 controls the heating device 53 to be turned off, the control method further includes:

step S816, detecting a fourth maximum value of the coil temperature of the indoor heat exchanger between the seventh preset time and the eighth preset time when the heating device 53 is turned off;

step S818, detecting the coil temperature of the indoor heat exchanger after the eighth preset time;

step S820, judging whether the difference value between the fourth maximum value and the coil temperature of the indoor heat exchanger is larger than or equal to a fourth preset difference value or not;

if not, the preset heat storage condition is not satisfied, and the process returns to step S814.

And controlling the heating device 53 to be closed when the situation that heat storage is not needed is judged according to the relation between the difference value between the third maximum value and the temperature of the coil of the outdoor heat exchanger and a third preset difference value. Detecting the coil temperature of the outdoor heat exchange tube between a seventh preset time and an eighth preset time after the heating device 53 is turned off, acquiring the maximum value (fourth maximum value) of the coil temperature of the outdoor heat exchanger between the seventh preset time and the eighth preset time, detecting the coil temperature of the outdoor heat exchanger after the eighth preset time, comparing the detected coil temperature of the outdoor heat exchanger with the fourth maximum value, and if the difference value between the fourth maximum value and the coil temperature of the outdoor heat exchanger is greater than or equal to the fourth preset difference value, indicating that the outdoor heat exchanger is frosted, requiring heat storage by the heat accumulator, maintaining the turn-on state of the heating device 53, and controlling the switching device 7 to be turned on, so that a refrigerant flows through the heat storage tube to store heat. If the difference between the fourth maximum value and the coil temperature of the outdoor heat exchanger is smaller than the fourth preset difference, it is indicated that the outdoor heat exchanger is not frosted or has a small frosting degree, the heating device 53 is controlled to be closed, the switching device 7 is closed, and the heat accumulator does not need to accumulate heat, so that controllable heat accumulation is realized.

step S822, judging whether defrosting is needed or not in a heating mode;

if the defrosting is needed, step S824 is executed, the switch device 7 is controlled to be closed, and the first connection port and the third connection port are controlled to be communicated with each other, so that the refrigerant flows through the heat exchange tube to defrost;

if the defrosting is not needed, returning to the step S812;

step S826, judging whether a preset defrosting end condition is met;

if the preset defrosting condition is met, executing step S828, exiting the defrosting mode, controlling the first connecting port to be communicated with the second connecting port, controlling the switch structure to be closed, and returning to step S804;

if the preset defrosting condition is not met, the process returns to step S824.

If the cooling operation is performed, step S832 is executed to control the switch device 7 to be turned off.

As shown in fig. 9, in a specific embodiment, the switching device 7 includes a check valve 71 and a solenoid valve 72, and the control method includes steps S902 to S922.

Step S902, detecting a starting mode;

if the mode is the refrigeration mode, executing step S922, closing the electromagnetic valve 72, and then disconnecting the heat storage pipe of the heat accumulator, so that no high-temperature and high-pressure refrigerant passes through and no heat is stored;

if the heating mode is selected, step S904 is executed, the electromagnetic valve 72 is closed, and the heating device 53 is opened;

step S906, detecting the maximum value T20 of the coil temperature T2 of the indoor heat exchanger in a time period from T1 to T2, wherein for example, the time T1 can be the time 7min away from the start-up heating, and the time T2 can be the time 12min away from the start-up heating;

step S908, detecting the real-time T2 temperature;

step S910, detecting whether real-time T20-T2 is more than or equal to △ T2, for example △ T2 can be 3 ℃;

if T20-T2 is not less than △ T2, the frosting of the outdoor heat exchanger is indicated, step S912 is executed, the electromagnetic valve 72 and the heating device 53 are opened, and the heat accumulator starts to accumulate heat;

if T20-T2 < △ T2, step S922 is executed, the electromagnetic valve 72 is closed, the heating device 53 is closed, step S922 is executed, step S906 is returned, and when step S906 is executed this time, T1 and T2 are the time from the closing of the heating device 53 in step S922, for example, the time T1 may be the time from the closing of the heating device 53 in step S922 for 7min, and the time T2 may be the time from the closing of the heating device 53 in step S922 for 12 min;

step S914, detecting whether defrosting is needed;

if yes, executing step S916, entering a defrosting mode to defrost;

if yes, returning to the step S912 to continue heat storage;

step S918, detecting whether the coil temperature T5 of the real-time outdoor heat exchanger is more than or equal to T50 or T5 is more than or equal to T51 for T3 time, wherein T50 can be 8 ℃, T51 can be 6 ℃ and T3 can be 40S;

if yes, executing step S920, and exiting the defrosting mode;

if not, return to step S916.

As shown in fig. 10, an embodiment according to a third aspect of the present invention provides a control apparatus 200, which includes a processor 206 and a memory 204, wherein the processor 206 is configured to implement the steps of the control method according to any one of the embodiments according to the first aspect when executing a computer program stored in the memory 204.

An embodiment of a fourth aspect of the present invention provides an air conditioner including the control device 200 as the embodiment of the third aspect.

An embodiment of the fifth aspect of the invention provides a computer-readable storage medium on which a computer program (instructions) is stored, which computer program (instructions), when executed by the processor 206, implements the steps of the control method as in any one of the embodiments of the second aspect.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage mediums comprising computer-usable program code(s) (including, but not limited to, disk storage 204, CD-ROM, optical storage 204, etc.).

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor 206 of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor 206 of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory 204 that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory 204 produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

In the description of the present invention, the term "plurality" means two or more unless explicitly specified or limited otherwise; the terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, or an electrical connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

It will be apparent to those skilled in the art that various changes and modifications may be made therein without departing from the scope of the invention as defined in the appended claims and their equivalents, and it is intended that the invention encompass such changes and modifications as well.

Claims

1. An air conditioner, comprising:

a compressor including an exhaust port and an intake port;

the reversing structure comprises a first port, a second port, a third port, a fourth port, a third port and a fourth port, wherein one of the second port and the fourth port is communicated with the first port, the other of the second port and the fourth port is communicated with the third port, the first port is connected with the exhaust port, and the third port is connected with the air inlet;

the second port is connected with the first end of the outdoor heat exchanger, the fourth port is connected with the first end of the indoor heat exchanger, and the second end of the outdoor heat exchange tube is connected with the second end of the indoor heat exchanger;

the heat accumulator comprises a heat accumulation pipe, the heat accumulation pipe is connected with the indoor heat exchanger in parallel, and a switch device for controlling the on-off of the heat accumulation pipe is connected to the heat accumulation pipe;

and the heating device is arranged on the heat accumulator and used for heating the heat accumulator.

2. The air conditioner according to claim 1, further comprising:

and the temperature detection device is arranged on the heat accumulator and used for detecting the temperature of the heat accumulator.

3. A control method of an air conditioner for controlling the air conditioner according to claim 1 or 2, characterized by comprising:

starting up the machine for heating, and controlling the heating device to be started so as to heat the heat accumulator;

and the working condition parameters of the air conditioner meet the preset heat storage condition, and the switching device is controlled to be switched on and maintain the on state of the heating device so as to enable the heat storage pipe to be conducted for heat storage.

4. The control method according to claim 3, characterized by comprising:

and the working condition parameters of the air conditioner do not meet the preset heat storage condition, and the heating device is controlled to be closed.

5. The control method according to claim 3, wherein the operating condition parameter includes an exhaust temperature of a compressor, and the operating condition parameter of the air conditioner satisfies a preset heat storage condition, and specifically includes:

detecting a first maximum value of the exhaust temperature of the compressor between a first preset moment and a second preset moment of starting heating;

detecting the exhaust temperature of the compressor after a second preset moment;

if the difference between the first maximum value and the exhaust temperature of the compressor is greater than or equal to a first preset difference, the preset heat storage condition is met;

and if the difference value between the first maximum value and the exhaust temperature of the compressor is smaller than the first preset difference value, the preset heat storage condition is not met.

6. The control method according to claim 5,

the range of the first preset time is 5-11 min, the range of the second preset time is 11-15 min, and the range of the first preset difference is 1-3 ℃.

7. The control method according to claim 4, wherein after controlling the heating device to be turned off, further comprising:

detecting a second maximum value of the exhaust temperature of the compressor between a third preset time and a fourth preset time when the heating device is turned off;

detecting the exhaust temperature of the compressor after a fourth preset moment;

if the difference between the second maximum value and the exhaust temperature of the compressor is greater than or equal to a second preset difference, the preset heat storage condition is met;

and if the difference value between the second maximum value and the exhaust temperature of the compressor is smaller than the second preset difference value, the preset heat storage condition is not met, and the second maximum value for detecting the exhaust temperature of the compressor between the third preset time and the fourth preset time when the heating device is turned off is returned.

8. The control method according to claim 7,

the range of the third preset time is 5-11 min, the range of the fourth preset time is 11-15 min, and the range of the second preset difference is 1-3 ℃.

9. The control method according to claim 3, wherein the operating condition parameter includes a coil temperature of the indoor heat exchanger, and the operating condition parameter of the air conditioner satisfies a preset heat storage condition, and specifically includes:

detecting a third maximum value of the coil temperature of the indoor heat exchanger between a fifth preset time and a sixth preset time of starting up heating;

detecting the temperature of a coil of the indoor heat exchanger after a sixth preset time;

if the difference value between the third maximum value and the coil temperature of the indoor heat exchanger is greater than or equal to a third preset difference value, the preset heat storage condition is met;

and if the difference value between the third maximum value and the coil temperature of the indoor heat exchanger is smaller than the third preset difference value, the preset heat storage condition is not met.

10. The control method according to claim 9,

the range of the fifth preset time is 5-11 min, the range of the sixth preset time is 11-15 min, and the range of the third preset difference is 1-3 ℃.

11. The control method according to claim 4, wherein after controlling the heating device to be turned off, further comprising:

detecting a fourth maximum value of the coil temperature of the indoor heat exchanger between a seventh preset time and an eighth preset time when the heating device is turned off;

detecting the temperature of a coil of the indoor heat exchanger after an eighth preset time;

if the difference value between the fourth maximum value and the coil temperature of the indoor heat exchanger is greater than or equal to a fourth preset difference value, the preset heat storage condition is met;

and if the difference value between the fourth maximum value and the coil temperature of the indoor heat exchanger is smaller than the fourth preset difference value, the preset heat storage condition is not met, and the fourth maximum value for detecting the coil temperature of the indoor heat exchanger between the seventh preset time and the eighth preset time when the heating device is turned off is returned.

12. The control method according to claim 11,

the range of the seventh preset time is 5-11 min, the range of the eighth preset time is 11-15 min, and the range of the fourth preset difference is 1-3 ℃.

13. The control method according to any one of claims 3 to 12, wherein the heat accumulator includes a heat exchange tube, the air conditioner includes a direction changer provided between a third port and an air inlet, the direction changer includes a first connection port to a third connection port, the first connection port is connected to the third port, the second connection port is connected to the air inlet through a connection pipe, one end of the heat exchange tube is connected to the third connection port, and the heat exchange tube is connected in parallel to the connection pipe, the control method includes:

and under the heating mode, the defrosting is judged to be needed, the switching device is controlled to be closed, and the first connecting port is controlled to be communicated with the third connecting port, so that the refrigerant flows through the heat exchange tube until a preset defrosting ending condition is met.

14. The control method according to claim 13, wherein the preset defrosting end condition includes that a coil temperature of the outdoor heat exchanger is greater than a first preset temperature, or that the coil temperature of the outdoor heat exchanger is greater than a second preset temperature for a preset time period, wherein the first preset temperature is greater than the second preset temperature.

15. The control method according to claim 14,

the first preset temperature range is 6-12 ℃, the second preset temperature range is 3-8 ℃, and the preset duration range is 20-60 s.

16. The control method according to claim 13, wherein in the heating mode, it is determined that defrosting is required, the switching device is controlled to be turned off, and the first connection port and the third connection port are controlled to communicate with each other, further comprising:

and controlling the heating device to be started.

17. A control apparatus of an air conditioner, characterized in that the control apparatus comprises a processor and a memory, the processor being configured to implement the steps of the control method of the air conditioner according to any one of claims 3 to 16 when executing a computer program stored in the memory.

18. An air conditioner, comprising: the control device of an air conditioner according to claim 17.

19. A computer-readable storage medium having stored thereon a computer program, characterized in that: the computer program, when executed by a processor, implements the steps of a control method of an air conditioner as claimed in any one of claims 3 to 16.