CN110173823B

CN110173823B - Operation control method, control device, air conditioner, and computer-readable storage medium

Info

Publication number: CN110173823B
Application number: CN201910472129.5A
Authority: CN
Inventors: 徐振坤; 唐亚林; 杜顺开; 蔡志昇
Original assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2021-06-29
Anticipated expiration: 2039-05-31
Also published as: CN110173823A

Abstract

The invention provides an operation control method, an operation control device, an air conditioner and a computer readable storage medium, wherein the operation control method comprises the following steps: the air conditioner operates in a heating mode, and the heating mode is switched to a defrosting mode or an electric auxiliary heating assembly is switched on in the heating mode according to the obtained working condition parameters; and in the defrosting mode, controlling a four-way valve to maintain the conduction direction unchanged, and controlling to open a control valve between the indoor heat exchanger and the outdoor heat exchanger to conduct the corresponding bypass pipeline. According to the technical scheme, at the stage that the frosting risk is detected but the defrosting condition is not reached, the heating effect of the air conditioner is reduced due to the limit of frosting, so that the electric auxiliary heating assembly can be started firstly, the heating effect under the working condition with the frosting risk is improved, and the air outlet temperature of the indoor unit and the room heating effect are further improved.

Description

Operation control method, control device, air conditioner, and computer-readable storage medium

Technical Field

The invention relates to the technical field of air conditioners, in particular to an operation control method, an operation control device, an air conditioner and a computer readable storage medium.

Background

In the related art, when an air conditioner operates in a heating mode, an outdoor heat exchanger in a low-temperature and high-humidity environment is prone to frosting, and the current solution is to change the direction of a four-way valve into a refrigeration cycle operation during defrosting so as to achieve the purpose of defrosting the outdoor unit, but the heating effect on a room is affected.

Disclosure of Invention

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

To this end, it is an object of the present invention to provide an operation control method.

Another object of the present invention is to provide an operation control device.

Another object of the present invention is to provide an air conditioner.

It is another object of the present invention to provide a computer-readable storage medium.

In order to achieve the above object, according to a first aspect of the present invention, there is provided an air conditioner including: a compressor; a first interface and a second interface in the four-way valve are respectively connected to an exhaust end and an air return end of the compressor; the outdoor heat exchanger and the indoor heat exchanger are connected through a first refrigerant pipeline, one end, far away from the first refrigerant pipeline, of the outdoor heat exchanger is connected to a third interface of the four-way valve through a second refrigerant pipeline, and one end, far away from the first refrigerant pipeline, of the indoor heat exchanger is connected to a fourth interface of the four-way valve through a third refrigerant pipeline; the controller is electrically connected with the throttling device and the control valve respectively, and after the heating mode is switched to the defrosting mode, the controller controls the four-way valve to keep the conduction direction unchanged, controls the control valve to be opened so as to enable the bypass pipeline to be conducted, and controls and adjusts the opening degree of the throttling device to the specified opening degree.

In the heating mode, the refrigerant flows from the indoor heat exchanger to the outdoor heat exchanger, then flows from the outdoor heat exchanger to the four-way valve, and returns to the air return end of the compressor.

In the foregoing technical solution, optionally, the throttling device includes a valve seat and a valve needle that reciprocates through excitation control, and an orifice that cooperates with the valve needle is opened on the valve seat to define a flow area of a refrigerant by the valve needle and the orifice, where the flow area increases according to a first rate from a first opening degree to a second opening degree, and the flow area increases according to a second rate from the second opening degree, and the second rate is greater than the first rate.

In the technical scheme, the increasing rate of the refrigerant flow area with two throttling devices is set so that when the frosting phenomenon of the outdoor heat exchanger is detected, the first rate is adjusted to the second rate, the refrigerant in the indoor heat exchanger is rapidly guided into the outdoor heat exchanger, and the defrosting operation when the four-way valve is not reversed can be realized due to the fact that the refrigerant still has higher temperature at the moment.

Wherein, the ratio of the refrigerant flow corresponding to the second opening degree to the refrigerant flow corresponding to the first opening degree is between [3.34, 100 ].

In the foregoing technical solution, optionally, the method further includes: the bypass pipeline is connected in parallel with the refrigerant pipeline provided with the throttling device; the control valve is arranged on the bypass pipeline, is electrically connected with the controller and is used for controlling the conduction or the cut-off of the bypass pipeline; and after the heating mode is switched to the defrosting mode, the controller controls the control valve which is connected with the first refrigerant pipeline in parallel to be opened so as to conduct the corresponding bypass pipeline.

In this technical scheme, through the parallelly connected bypass pipeline with the refrigerant pipeline that is provided with throttling arrangement to set up the control valve on the bypass pipeline, when carrying out the defrosting operation, switch on through the parallelly connected first bypass pipeline of control valve control and first refrigerant pipeline, combine throttling arrangement's control, with the pressure differential that reduces between indoor heat exchanger and the outdoor heat exchanger, and switch on through first bypass management, make the high temperature refrigerant of indoor heat exchanger side can flow to the outdoor heat exchanger fast, and then realize the defrosting effect through the heat dissipation of high temperature refrigerant.

In the foregoing technical solution, optionally, the method further includes: and the refrigerant heating device is arranged on a pipeline between the exhaust end and the four-way valve and/or on a gas-liquid separator corresponding to the gas return end and is used for being started in a defrosting mode so as to heat the refrigerant discharged by the compressor and/or heat the refrigerant returning to the compressor.

In this technical scheme, set up refrigerant heating device through the exhaust end at the compressor to promote compressor exhaust refrigerant temperature, on the one hand, be favorable to promoting under the mode of heating to indoor heating effect, on the other hand also is favorable to increasing the heat that the refrigerant that flows to outdoor heat exchanger from indoor heat exchanger carried, and then promotes the defrosting effect.

Through set up refrigerant heating device on vapour and liquid separator, can promote the dryness fraction of breathing in when defrosting, alleviate the problem that the compressor returned the liquid, improve the reliability.

In the foregoing technical solution, optionally, the method further includes: and the electric auxiliary heating assembly is arranged corresponding to the indoor heat exchanger, is electrically connected with the controller and is used for being started in the defrosting mode.

In this technical scheme, at the stage that detects to have the risk of frosting but not reach the condition of defrosting, because the restriction that frosts leads to the heating effect of air conditioner to reduce, consequently can open electric auxiliary heating subassembly earlier to promote the heating effect under the operating mode that has the risk of frosting, and then promote the air-out temperature and the room heating effect of indoor set.

In addition, under the mode of defrosting, because indoor heat exchanger's high temperature refrigerant flows to outdoor heat exchanger, consequently leads to influencing the effect of heating, through opening the electricity and assist hot subassembly, can compensate to the not enough of indoor heating ability under the mode of defrosting to guarantee user's use and experience.

In the above technical solution, optionally, the outdoor heat exchanger is formed by a single row heat exchange tube structure.

In the technical scheme, the outdoor heat exchanger is constructed by adopting the single-row heat exchange tubes, so that the surface area exposed outdoors is reduced, the defrosting difficulty can be reduced, and the reliability of defrosting operation when the four-way valve maintains the same flow direction as the heating mode is ensured.

In the above technical solution, optionally, the outdoor heat exchanger is formed by a multi-row heat exchange tube structure.

Wherein, the multiple rows of heat exchange tubes can comprise 2.6 rows of chambers, two rows, 1.6 rows, 1.5 rows and the like.

In the foregoing technical solution, optionally, the method further includes: the outdoor fan is arranged opposite to the outdoor heat exchanger and is electrically connected with the controller; and the indoor fan is arranged opposite to the indoor heat exchanger and is electrically connected with the controller, wherein in the defrosting mode, the controller controls the speed of the outdoor fan to be reduced and controls the indoor fan to operate according to a cold air prevention rule.

In the technical scheme, in the operation process of the air conditioner, when the pipe temperature of the indoor heat exchanger is detected to be smaller than a first temperature threshold value, the indoor fan is started to blow cold air indoors, the heating effect is influenced, the cold air control rule is prevented through the indoor fan, the indoor fan is started under the condition that the pipe temperature of the indoor heat exchanger is larger than or equal to the first temperature threshold value, and the rotating speed of the indoor fan is in direct proportion to the pipe temperature of the indoor heat exchanger so as to achieve the good heating effect.

In addition, when the defrosting operation is executed, the speed reduction or the stop of the outdoor fan is controlled to prevent the heat of the outdoor heat exchanger from being diffused to the outside so as to obtain a good defrosting effect.

The first temperature threshold value can be determined according to body surface cold and heat induction of a user.

In the above technical solution, optionally, the throttling device is an electronic expansion valve; the control valve is an electromagnetic stop valve.

In addition, under the condition that the throttling device is not controlled by the controller, the throttling device can also be a capillary tube, a throttling valve, a self-holding throttling valve, a thermal expansion valve and other throttling components.

In the above technical solution, optionally, a first electronic expansion valve is disposed on the first refrigerant pipeline, and a second electronic expansion valve is disposed on the second refrigerant pipeline; and a two-way electromagnetic stop valve is arranged on a first bypass pipeline connected with the first refrigerant pipeline in parallel, a one-way electromagnetic stop valve or a two-way electromagnetic stop valve is arranged on a second bypass pipeline connected with the second refrigerant pipeline in parallel, wherein if the one-way electromagnetic stop valve is arranged on the second bypass pipeline, the one-way conduction direction of the one-way electromagnetic stop valve is from the four-way valve to the direction of the outdoor heat exchanger.

In the technical scheme, the normally closed one-way electromagnetic stop valve and the second electronic expansion valve are arranged in parallel or the normally closed two-way electromagnetic stop valve and the second electronic expansion valve are arranged in parallel, so that the liquid impact risk during defrosting operation is favorably improved.

In addition, the one-way electromagnetic stop valve has a single-phase stop function under the condition of power failure, so that power-on does not need to be controlled in a refrigeration mode, and the preparation cost is lower.

An aspect of the second aspect of the present invention provides an operation control method, which is applied to the air conditioner in the aspect of the first aspect, and the operation control method includes: the air conditioner operates in a heating mode, and the heating mode is switched to a defrosting mode or an electric auxiliary heating assembly is switched on in the heating mode according to the obtained working condition parameters; and in the defrosting mode, controlling a four-way valve to maintain the conduction direction unchanged, and controlling to open a control valve between the indoor heat exchanger and the outdoor heat exchanger to conduct the corresponding bypass pipeline.

Wherein the working condition parameters comprise temperature working condition parameters and/or time working condition parameters.

In the foregoing technical solution, optionally, the method further includes: and if the electric auxiliary heating assembly is started in the heating mode, continuously acquiring the working condition parameters so as to continuously detect whether the heating mode is switched to the defrosting mode according to the working condition parameters.

In the technical scheme, if the frosting risk of the current outdoor heat exchanger is determined according to the working condition parameters, namely a frosting detection stage is entered, the corresponding defrosting starting condition and the auxiliary heating starting condition are determined, so that the real-time working condition parameters are continuously detected in the frosting detection stage, and when the working condition parameters are matched with one of the defrosting starting condition or the auxiliary heating starting condition, the corresponding control operation is executed, on one hand, in the stage that the frosting risk is detected but the frosting condition is not reached, the heating effect of the air conditioner is reduced due to the frosting limitation, so that the electric auxiliary heating assembly can be started first, the heating effect under the working condition with the frosting risk is improved, the air outlet temperature of the indoor unit and the heating effect of a room are improved, on the other hand, the time point entering the frosting mode can be accurately evaluated by setting the defrosting starting condition and the auxiliary heating starting condition, therefore, the defrosting mode can be prevented from lasting too long, and the normal use of a user is influenced.

In the foregoing technical solution, optionally, the control valve includes a first electromagnetic shutoff valve and a second electromagnetic shutoff valve that are respectively disposed on two sides of the outdoor heat exchanger, the first electromagnetic shutoff valve is disposed near the indoor heat exchanger, the second electromagnetic shutoff valve is disposed near the four-way valve, and the air conditioner operates in the heating mode, and further includes: in the heating mode, controlling the first electromagnetic stop valve to be closed to stop the corresponding first bypass pipeline; and controlling the second electromagnetic stop valve to be opened to enable the corresponding second bypass pipeline to be communicated, wherein the second electromagnetic stop valve is a one-way electromagnetic stop valve or a two-way electromagnetic stop valve.

In the technical scheme, in the heating mode, the first electromagnetic stop valve is controlled to be closed so as to stop the corresponding first bypass pipeline, the heating function is realized by adjusting the first throttling device on the parallel pipeline, and the second electromagnetic stop valve is controlled to be opened so as to conduct the corresponding second bypass pipeline, so that the reliability of refrigerant circulation between the outdoor heat exchanger and the four-way valve is ensured.

In the foregoing technical solution, optionally, the controlling opening a control valve between the indoor heat exchanger and the outdoor heat exchanger to conduct a corresponding bypass line specifically includes: controlling the first electromagnetic stop valve to be opened to enable the first bypass pipeline to be communicated; and controlling the second electromagnetic valve to be closed, and stopping the second bypass pipeline.

In this technical scheme, in the one side that outdoor heat exchanger and indoor heat exchanger are connected, through the bypass pipeline that connects in parallel with the refrigerant pipeline that is provided with throttling arrangement, and set up the control valve on the bypass pipeline, when carrying out the defrosting operation, switch on through the parallelly connected first bypass pipeline of control valve control and first refrigerant pipeline, combine the control to throttling arrangement, in order to reduce the pressure differential between indoor heat exchanger and the outdoor heat exchanger, and switch on through first bypass management, make the high temperature refrigerant of indoor heat exchanger side can flow to outdoor heat exchanger fast, and then realize the defrosting effect through the heat dissipation of high temperature refrigerant.

On one side of the outdoor heat exchanger connected with the four-way valve, the normally closed one-way electromagnetic stop valve and the second electronic expansion valve are arranged in parallel or the normally closed two-way electromagnetic stop valve and the second electronic expansion valve are arranged in parallel, so that the liquid impact risk during defrosting operation is favorably improved.

In the foregoing technical solution, optionally, if the heating mode is switched to the defrosting mode, the method further includes: in the defrosting mode, determining a temperature interval to which the outdoor temperature belongs; determining a corresponding first target opening degree and a corresponding second target opening degree according to the temperature interval; controlling the first throttling device to adjust to the first target opening degree; and controlling the second throttling device to adjust to the second target opening degree.

Wherein, the lower the temperature value in the temperature interval, the larger the opening degree of the corresponding throttling device.

The defrosting effect under the heating mode can be achieved by controlling the first throttling device, and the probability that the compressor is subjected to liquid impact in the defrosting process can be reduced by controlling the second throttling device, so that the running reliability of the air conditioner system is improved.

In the foregoing technical solution, optionally, if the heating mode is switched to the defrosting mode, the method further includes: in the defrosting mode, if the indoor pipe temperature is detected to be greater than or equal to a first temperature threshold value, the indoor fan is controlled to be started, and the rotation speed control of the indoor fan is positively correlated with the indoor pipe temperature; and controlling the outdoor fan to run at a reduced speed.

In the foregoing technical solution, optionally, if the heating mode is switched to the defrosting mode, the method further includes: and in the defrosting mode, controlling to start the electric auxiliary heating assembly.

In the foregoing technical solution, optionally, if the heating mode is switched to the defrosting mode, the method further includes: and in the defrosting mode, controlling to start the refrigerant heating device.

In the foregoing technical solution, optionally, determining, according to the operating condition parameter, whether to switch from the heating mode to the defrosting mode or to turn on the electric auxiliary heating assembly in the heating mode specifically includes: in the heating mode, detecting that the room temperature enters a first temperature threshold interval; determining a plurality of second temperature threshold intervals corresponding to the first temperature threshold interval; when the outdoor temperature enters any second temperature threshold value interval, respectively determining a defrosting starting condition and an auxiliary heating starting condition corresponding to any second temperature threshold value interval; before starting defrosting operation according to the defrosting starting condition, if the collected working condition parameters are matched with the auxiliary heating starting condition, the electric auxiliary heating assembly is controlled to be started.

In the technical scheme, a first temperature threshold interval corresponding to room temperature and a plurality of second temperature threshold intervals corresponding to the first temperature threshold interval are preset, the second temperature threshold intervals correspond to outdoor temperature, if the room temperature is detected to be in the first temperature threshold interval and the outdoor temperature is in any one of the second temperature threshold intervals, the frosting risk is indicated, namely a frosting detection stage is started, if frosting occurs and the thickness of a frost layer does not reach the defrosting requirement degree, at the moment, real-time working condition parameters are continuously detected in the frosting detection stage by determining the defrosting starting condition and the auxiliary heating starting condition corresponding to the second temperature threshold intervals, when the working condition parameters are matched with one of the defrosting starting condition or the auxiliary heating starting condition, corresponding control operation is specified, for example, when the working condition is matched with the defrosting starting condition, then directly get into the mode of defrosting, when opening the condition with the auxiliary heating when matching, then open electric auxiliary heating subassembly earlier, in order to guarantee to indoor heating effect, on the one hand, detect the phenomenon of frosting appearing, but frost layer thickness does not reach the degree that needs the defrosting but does not reach the stage of defrosting condition, because the restriction of frosting leads to the heating effect of air conditioner to reduce, consequently can open electric auxiliary heating subassembly earlier, in order to promote the heating effect before opening the operation of defrosting, on the other hand, open the condition and auxiliary heating through setting up the defrosting, can accurately assess the time point that gets into the mode of defrosting, thereby be favorable to reducing the opening duration of defrosting operation, prevent to influence the normal use of user to the air conditioner.

In the foregoing technical solution, optionally, determining, according to the operating condition parameter, whether the heating mode is switched to the defrosting mode or the electric auxiliary heating assembly is turned on in the heating mode specifically further includes: and in the frosting detection stage, if the variation of the outdoor pipe temperature and/or the variation of the temperature difference between the indoor pipe temperature and the room temperature is detected to meet the defrosting starting condition, switching to the defrosting mode.

In the foregoing technical solution, optionally, the method further includes: and in the defrosting operation executing process, continuously collecting working condition parameters, and switching the defrosting mode to the heating mode if the working condition parameters are detected to meet the condition of quitting defrosting, wherein the absolute threshold of the variation of the outdoor tube temperature in the defrosting starting condition is larger than the absolute threshold of the variation of the outdoor tube temperature in the auxiliary heating starting condition.

In this case, the threshold of the variation amount is an absolute value, and when the threshold of the variation rate is regarded as an absolute value (i.e., the threshold of the variation amount absolute value), the threshold of the variation amount absolute value of the outdoor tube temperature in the defrosting-on condition is greater than the threshold of the variation amount absolute value of the outdoor tube temperature in the auxiliary heating-on condition.

In the technical scheme, the condition of turning on the electric auxiliary heating is easier to achieve and the defrosting starting condition is harder to achieve by limiting the absolute threshold of the variation of the outdoor pipe temperature in the defrosting starting condition to the absolute threshold of the variation of the outdoor pipe temperature in the auxiliary heating starting condition, so that the requirements of turning on the electric auxiliary heating during defrosting and auxiliary heating indoors can be met.

In the foregoing technical solution, optionally, the method further includes: if the indoor tube is switched back to the heating mode, detecting whether the temperature of the indoor tube is greater than or equal to a second temperature threshold value; and if the temperature of the indoor pipe is less than the second temperature threshold, controlling the electric auxiliary heating assembly to be in an opening state continuously until the temperature of the indoor pipe is increased to be greater than or equal to the second temperature threshold.

According to the technical scheme, whether the electric auxiliary heating assembly is continuously started or not is determined by detecting the relation between the indoor tube temperature and the second temperature threshold value after defrosting is finished, so that the problem that the heat supply temperature of the indoor heat exchanger is slow after defrosting is finished is solved.

The second temperature threshold value indicates that the pipe temperature of the indoor heat exchanger cannot provide a good heating and air-out effect, and can be determined according to a use experience value.

In the foregoing technical solution, optionally, the method further includes: the air conditioner runs in a refrigeration mode, and controls the first electromagnetic stop valve to be closed so as to stop the first bypass pipeline; and if the second electromagnetic stop valve is a one-way electromagnetic stop valve, controlling the one-way electromagnetic stop valve to be powered off, and if the second electromagnetic stop valve is a two-way electromagnetic stop valve, controlling the two-way electromagnetic stop valve to be powered on so as to enable the second bypass pipeline to be conducted.

In the technical scheme, the independent operation of the refrigeration mode and the operation of the heating mode and the defrosting mode are both realized by jointly controlling the first electromagnetic stop valve and the second electromagnetic stop valve.

And the unidirectional conduction direction of the unidirectional electromagnetic stop valve is from the four-way valve to the direction of the outdoor heat exchanger.

A third aspect of the present invention provides an operation control device for an air conditioner, including: a processor capable of, when executing a computer program: the steps of the operation control method described in the second aspect of the present invention.

A technical solution of a fourth aspect of the present invention provides an air conditioner, including: the technical solution of the second aspect provides an operation control device.

An embodiment of the fifth aspect of the present invention provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed, the computer program implements the steps of the operation control method according to any one of the above technical solutions.

The air conditioner and the operation control method suitable for the air conditioner at least have the following technical effects:

(1) through the control of the second throttling device, the probability that the compressor is subjected to liquid impact in the defrosting process can be reduced, and therefore the running reliability of the air conditioner system is improved.

(2) Through the combined control of the first electromagnetic stop valve and the second electromagnetic stop valve, the independent operation of a refrigeration mode and the operation of a heating mode and a defrosting mode are realized.

(3) The electric auxiliary heating assembly and/or the refrigerant heating device are/is controlled to be started, so that the problems that frosting does not enter the defrosting heating effect and is continuously reduced, the indoor heat absorption and heating effect is low in the defrosting stage, the heating effect slowly rises after defrosting is finished and the heat energy is insufficient in three different stages can be solved.

(4) Through setting up refrigerant heating device, can promote the quality of breathing in when defrosting, alleviate the problem that the compressor returned liquid, improve the reliability.

(5) Through setting up refrigerant heating device, can improve exhaust temperature, and then promote the defrosting effect.

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 view illustrating an air conditioner according to an embodiment of the present invention;

FIG. 2 shows a schematic view of a throttle device according to an embodiment of the present invention;

fig. 3 is a schematic structural view illustrating an air conditioner according to another embodiment of the present invention;

fig. 4 is a schematic structural view illustrating an air conditioner according to still another embodiment of the present invention;

fig. 5 is a schematic structural view illustrating an air conditioner according to still another embodiment of the present invention;

fig. 6 is a schematic structural view illustrating an air conditioner according to still another embodiment of the present invention;

fig. 7 is a schematic structural view illustrating an air conditioner according to still another embodiment of the present invention;

fig. 8 is a schematic structural view illustrating an air conditioner according to still another embodiment of the present invention;

fig. 9 is a schematic structural view illustrating an air conditioner according to still another embodiment of the present invention;

fig. 10 is a schematic structural view illustrating an air conditioner according to still another embodiment of the present invention;

fig. 11 is a schematic structural view illustrating an air conditioner according to still another embodiment of the present invention;

fig. 12 is a schematic structural view illustrating an air conditioner according to still another embodiment of the present invention;

fig. 13 is a schematic structural view illustrating an air conditioner according to still another embodiment of the present invention;

fig. 14 is a schematic structural view showing an air conditioner according to still another embodiment of the present invention;

fig. 15 is a schematic structural view showing an air conditioner according to still another embodiment of the present invention;

fig. 16 is a schematic structural view showing an air conditioner according to still another embodiment of the present invention;

fig. 17 is a schematic structural view illustrating an air conditioner according to still another embodiment of the present invention;

fig. 18 is a schematic structural view showing an air conditioner according to still another embodiment of the present invention;

fig. 19 is a schematic structural view showing an air conditioner according to still another embodiment of the present invention;

fig. 20 is a schematic structural view illustrating an air conditioner according to still another embodiment of the present invention;

fig. 21 is a schematic structural view showing an air conditioner according to still another embodiment of the present invention;

fig. 22 is a schematic structural view showing an air conditioner according to still another embodiment of the present invention;

FIG. 23 shows a schematic flow diagram of an operation control method according to an embodiment of the invention;

FIG. 24 is a schematic flow chart diagram illustrating an operation control method according to another embodiment of the present invention;

FIG. 25 is a schematic flow chart diagram illustrating an operation control method according to still another embodiment of the present invention;

FIG. 26 is a schematic flow chart diagram illustrating an operation control method according to yet another embodiment of the present invention;

FIG. 27 is a schematic flow chart diagram illustrating an operation control method according to yet another embodiment of the present invention;

fig. 28 shows a schematic block diagram of an operation 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 22 is:

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 of the present invention and features of the embodiments 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 in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

As shown in fig. 1, the air conditioner used in the operation control method of the present application may have the following components, including: the air conditioner comprises a compressor 102, a four-way valve 104, an outdoor fan 106, an outdoor heat exchanger 108, an indoor heat exchanger 110, an indoor fan 112 and a first throttling device 114, wherein the first throttling device 114 is arranged on a first refrigerant pipeline between the outdoor heat exchanger and the indoor heat exchanger.

Alternatively, as shown in fig. 2, the first throttle device 114 is a throttle device whose flow rate can be adjusted in multiple steps, and includes a valve seat 1416 and a valve needle 1414 that is controlled to reciprocate by excitation, and an orifice 1418 that is fitted to the valve needle 1414 is opened in the valve seat 1416 so that a flow area of refrigerant is defined by the valve needle and the orifice, where the flow area increases according to a first rate from a first opening angle to a second opening angle, and the flow area increases according to a second rate from the second opening angle, and the second rate is greater than the first rate.

As shown in fig. 2, the first throttling device 114 further includes the following structure: spring 1402, stator coil 1404, rotor magnet 1406, needle rotation sleeve 1408, positioning ring 1410 and access copper tube 712.

The valve pin 1414 may be formed by a cone structure 1422 and a frustoconical structure 1420, wherein the frustoconical generatrix is a straight line.

In this embodiment, the increasing rate of the refrigerant flow area with two throttling devices is set to adjust the first rate to the second rate when the frosting phenomenon of the outdoor heat exchanger 108 is detected, so as to quickly guide the refrigerant in the indoor heat exchanger 110 into the outdoor heat exchanger 108, and because the refrigerant still has a higher temperature at this time, the defrosting operation when the four-way valve 104 is not reversed can be realized.

Optionally, a first bypass line is connected in parallel with the first refrigerant line, and a first control valve 116 is disposed on the first bypass line.

Optionally, a second refrigerant pipeline is connected between the outdoor heat exchanger 108 and the four-way valve 104, and a second throttling device 118 is disposed on the second refrigerant pipeline.

Optionally, a first bypass pipeline is connected in parallel with the second refrigerant pipeline, and a first control valve 116 is disposed on the second bypass pipeline.

Optionally, the first control valve 116 is a two-way electromagnetic shutoff valve, and the second control valve 120 is a one-way electromagnetic shutoff valve or a two-way electromagnetic shutoff valve.

Specifically, the air conditioner includes: a compressor 102; a four-way valve 104, wherein a first interface and a second interface of the four-way valve 104 are respectively connected to a discharge end and a return end of the compressor 102; an outdoor heat exchanger 108 and an indoor heat exchanger 110 which are connected by a first refrigerant pipeline, wherein one end of the outdoor heat exchanger 108, which is far away from the first refrigerant pipeline, is connected to a third interface of the four-way valve 104 through a second refrigerant pipeline, and one end of the indoor heat exchanger 110, which is far away from the first refrigerant pipeline, is connected to a fourth interface of the four-way valve 104 through a third refrigerant pipeline; the controller is electrically connected with the throttling device and the control valve respectively, and after the heating mode is switched to the defrosting mode, the controller controls the four-way valve 104 to keep the conduction direction unchanged, controls the control valve to be opened so as to enable the bypass pipeline to be conducted, and controls and adjusts the opening degree of the throttling device to the specified opening degree.

In the cooling mode, the refrigerant is discharged from the discharge end of the compressor 102 to the four-way valve 104, and flows from the four-way valve 104 to the outdoor heat exchanger 108, and in the heating mode, the refrigerant flows from the indoor heat exchanger 110 to the outdoor heat exchanger 108, and then flows from the outdoor heat exchanger 108 to the four-way valve 104, and returns to the air return end of the compressor 102.

In the above embodiment, optionally, the method further includes: the bypass pipeline is connected in parallel with the refrigerant pipeline provided with the throttling device; the control valve is arranged on the bypass pipeline, is electrically connected with the controller and is used for controlling the conduction or the cut-off of the bypass pipeline; and after the heating mode is switched to the defrosting mode, the controller controls the control valve which is connected with the first refrigerant pipeline in parallel to be opened so as to conduct the corresponding bypass pipeline.

In this embodiment, a bypass pipeline is connected in parallel with a refrigerant pipeline provided with a throttling device, and a control valve is arranged on the bypass pipeline, when defrosting operation is performed, the conduction of a first bypass pipeline connected in parallel with the first refrigerant pipeline is controlled by the control valve, the control on the throttling device is combined to reduce the pressure difference between the indoor heat exchanger 110 and the outdoor heat exchanger 108, and the conduction is managed by the first bypass, so that high-temperature refrigerant on the side of the indoor heat exchanger 110 can rapidly flow to the outdoor heat exchanger 108, and further the defrosting effect is realized by heat dissipation of the high-temperature refrigerant.

Optionally, the air conditioner further comprises: the refrigerant heating device 124 includes at least three setting modes:

as shown in fig. 5, the refrigerant heating device 124B is disposed on a pipeline between the exhaust end and the four-way valve 104.

As shown in fig. 4, the refrigerant heating device 124A is disposed on the gas-liquid separator corresponding to the gas return end.

As shown in fig. 6, the refrigerant heating device 124 is disposed on a gas-liquid separator corresponding to the gas return end on a pipeline between the exhaust end and the four-way valve 104.

The refrigerant heating device 124 is configured to be turned on in a defrosting mode to heat the refrigerant discharged from the compressor 102 and/or to heat the refrigerant returning to the compressor 102.

In this embodiment, the refrigerant heating device 124 is disposed at the exhaust end of the compressor 102 to increase the temperature of the refrigerant discharged from the compressor 102, which is beneficial to increasing the heating effect to the indoor space in the heating mode, and is beneficial to increasing the heat carried by the refrigerant flowing from the indoor heat exchanger 110 to the outdoor heat exchanger 108, thereby increasing the defrosting effect.

By arranging the refrigerant heating device 124 on the gas-liquid separator, the air suction dryness during defrosting can be improved, the problem of liquid return of the compressor 102 is relieved, and the reliability is improved.

As shown in fig. 3, optionally, the air conditioner further includes: and the electric auxiliary heating assembly 122 is arranged corresponding to the indoor heat exchanger 110, is electrically connected with the controller, and is used for being turned on in the defrosting mode to heat the indoor heat exchanger 110.

In this embodiment, at the stage when the frosting risk is detected but the defrosting condition is not reached, the heating effect of the air conditioner is reduced due to the limitation of frosting, so that the electric auxiliary heating assembly 122 can be turned on first to improve the heating effect under the working condition with the frosting risk, and further improve the air outlet temperature of the indoor unit and the room heating effect.

In addition, in the defrosting mode, since the high-temperature refrigerant of the indoor heat exchanger 110 flows to the outdoor heat exchanger 108, the heating effect is affected, and by turning on the electric auxiliary heating assembly 122, the shortage of indoor heating capacity in the defrosting mode can be made up, so that the use experience of a user is ensured.

In the above embodiment, optionally, the outdoor heat exchanger 108 is formed by a single row heat exchange tube configuration.

Fig. 7 to 14 show an air conditioner structure provided with an outdoor heat exchanger 108 formed of a single row of heat exchange tubes.

As shown in fig. 7, a first throttling device 114 is disposed on the first heat exchange pipeline, and a first bypass pipeline connected in parallel with the first heat exchange pipeline is provided with a first control valve 116.

As shown in fig. 8, a first throttling device 114 is disposed on the first heat exchange pipeline, a first bypass pipeline connected in parallel with the first heat exchange pipeline is provided with a first control valve 116, and an electric auxiliary heating assembly 122 is further disposed on the indoor side.

As shown in fig. 9, a first throttling device 114 is disposed on the first heat exchanging pipeline, a first bypass pipeline connected in parallel with the first heat exchanging pipeline is provided with a first control valve 116, and a refrigerant heating device 124A is disposed on the gas-liquid separator corresponding to the gas return end.

As shown in fig. 10, a first throttling device 114 is disposed on the first heat exchanging pipeline, a first bypass pipeline connected in parallel with the first heat exchanging pipeline is provided with a first control valve 116, and a refrigerant heating device 124B is disposed on the pipeline between the exhaust end and the four-way valve 104.

As shown in fig. 11, a first throttling device 114 is disposed on the first heat exchanging pipeline, a first bypass pipeline connected in parallel with the first heat exchanging pipeline is provided with a first control valve 116, and a refrigerant heating device 124 is disposed on the gas-liquid separator corresponding to the gas return end on the pipeline between the exhaust end and the four-way valve 104.

As shown in fig. 12, a first throttling device 114 is disposed on the first heat exchanging pipeline, a first bypass pipeline connected in parallel with the first heat exchanging pipeline is provided with a first control valve 116, a refrigerant heating device 124A is disposed on the gas-liquid separator corresponding to the gas return end, and an electric auxiliary heating assembly 122 is further disposed on the indoor side.

As shown in fig. 13, a first throttling device 114 is disposed on the first heat exchanging pipeline, a first bypass pipeline connected in parallel with the first heat exchanging pipeline is provided with a first control valve 116, a refrigerant heating device 124B is disposed on the pipeline between the exhaust end and the four-way valve 104, and an electric auxiliary heating assembly 122 is further disposed on the indoor side.

As shown in fig. 14, a first throttling device 114 is disposed on the first heat exchanging pipeline, a first bypass pipeline connected in parallel with the first heat exchanging pipeline is provided with a first control valve 116, a refrigerant heating device 124 is disposed on a gas-liquid separator corresponding to the gas return end on the pipeline between the exhaust end and the four-way valve 104, and an electric auxiliary heating assembly 122 is further disposed on the indoor side.

In this embodiment, by constructing the outdoor heat exchanger 108 with a single row of heat exchange tubes, the surface area exposed to the outside is reduced, and therefore the difficulty of defrosting can be reduced to ensure the reliability of defrosting operation when the four-way valve 104 maintains the same flow direction as the heating mode.

In the above embodiment, optionally, the outdoor heat exchanger 108 is formed by a multi-row heat exchange tube configuration.

In the above embodiment, optionally, the method further includes: an outdoor fan 106 arranged opposite to the outdoor heat exchanger 108 and electrically connected to the controller; and an indoor fan 112 disposed opposite to the indoor heat exchanger 110 and electrically connected to the controller, wherein in the defrosting mode, the controller controls the outdoor fan 106 to reduce the speed and controls the indoor fan 112 to operate according to a cold air prevention rule.

In this embodiment, in the operation process of the air conditioner, that is, when it is detected that the tube temperature of the indoor heat exchanger 110 is less than the first temperature threshold, the indoor fan 112 is turned on to blow cold air indoors, which affects the heating effect, the cold air prevention control rule is set by the indoor fan 112, that is, the indoor fan 112 is turned on only when the tube temperature of the indoor heat exchanger 110 is greater than or equal to the first temperature threshold, and the rotation speed of the indoor fan 112 is in direct proportion to the tube temperature of the indoor heat exchanger 110, so as to achieve a better heating effect.

In addition, when the defrosting operation is performed, the outdoor fan 106 is controlled to be decelerated or stopped to prevent the heat of the outdoor heat exchanger 108 from being diffused to the outside, so that a good defrosting effect is obtained.

In the foregoing embodiment, optionally, the throttling device is an electronic expansion valve; the control valve is an electromagnetic stop valve.

Fig. 15 to 22 show an air conditioner structure in which the bypass flow path is provided on the circuits on both sides of the outdoor heat exchanger, wherein the outdoor heat exchanger 108 may be a heat exchanger with multiple heat exchange pipes or a heat exchanger with a single heat exchange pipe.

In the above embodiment, optionally, a first electronic expansion valve 114 is disposed on the first refrigerant pipeline, and a second electronic expansion valve 118 is disposed on the second refrigerant pipeline; a two-way electromagnetic stop valve 116 is arranged on a first bypass pipeline connected in parallel with the first refrigerant pipeline, a one-way electromagnetic stop valve 120 or a two-way electromagnetic stop valve 120 is arranged on a second bypass pipeline connected in parallel with the second refrigerant pipeline, wherein if the one-way electromagnetic stop valve is arranged on the second bypass pipeline, the one-way conduction direction of the one-way electromagnetic stop valve is from the four-way valve 104 to the direction of the outdoor heat exchanger 108.

As shown in fig. 15, a first throttling device 114 is disposed on the first heat exchanging pipeline, a first control valve 116 is disposed on the first bypass pipeline connected in parallel with the first heat exchanging pipeline, a second throttling device 118 is disposed on the second heat exchanging pipeline, and a second control valve 120 is disposed on the second bypass pipeline connected in parallel with the second heat exchanging pipeline.

As shown in fig. 16, a first throttling device 114 is disposed on the first heat exchanging pipeline, a first bypass pipeline connected in parallel with the first heat exchanging pipeline is provided with a first control valve 116, a second throttling device 118 is disposed on the second heat exchanging pipeline, a second bypass pipeline connected in parallel with the second heat exchanging pipeline is provided with a second control valve 120, and an electric auxiliary heating assembly 122 is further disposed on the indoor side.

As shown in fig. 17, a first throttling device 114 is disposed on the first heat exchanging pipeline, a first bypass pipeline connected in parallel with the first heat exchanging pipeline is provided with a first control valve 116, a second throttling device 118 is disposed on the second heat exchanging pipeline, a second bypass pipeline connected in parallel with the second heat exchanging pipeline is provided with a second control valve 120, and a refrigerant heating device 124A is disposed on the gas-liquid separator corresponding to the gas return end.

As shown in fig. 18, a first throttling device 114 is disposed on the first heat exchanging pipeline, a first control valve 116 is disposed on the first bypass pipeline connected in parallel with the first heat exchanging pipeline, a second throttling device 118 is disposed on the second heat exchanging pipeline, a second control valve 120 is disposed on the second bypass pipeline connected in parallel with the second heat exchanging pipeline, and a refrigerant heating device 124B is disposed on the pipeline between the exhaust end and the four-way valve 104.

As shown in fig. 19, a first throttling device 114 is disposed on the first heat exchange pipeline, a first bypass pipeline connected in parallel with the first heat exchange pipeline is provided with a first control valve 116, a second throttling device 118 is disposed on the second heat exchange pipeline, a second bypass pipeline connected in parallel with the second heat exchange pipeline is provided with a second control valve 120, and a refrigerant heating device 124 is disposed on the gas-liquid separator corresponding to the gas return end on the pipeline between the exhaust end and the four-way valve 104.

As shown in fig. 20, a first throttling device 114 is disposed on the first heat exchange pipeline, a first bypass pipeline connected in parallel with the first heat exchange pipeline is provided with a first control valve 116, a second throttling device 118 is disposed on the second heat exchange pipeline, a second bypass pipeline connected in parallel with the second heat exchange pipeline is provided with a second control valve 120, a refrigerant heating device 124A is disposed on the gas-liquid separator corresponding to the gas return end, and an electric auxiliary heating assembly 122 is further disposed on the indoor side.

As shown in fig. 21, a first throttling device 114 is disposed on the first heat exchanging pipeline, a first control valve 116 is disposed on a first bypass pipeline connected in parallel with the first heat exchanging pipeline, a second throttling device 118 is disposed on the second heat exchanging pipeline, a second control valve 120 is disposed on a second bypass pipeline connected in parallel with the second heat exchanging pipeline, a refrigerant heating device 124B is disposed on a pipeline between the exhaust end and the four-way valve 104, and an electric auxiliary heating assembly 122 is further disposed on the indoor side.

As shown in fig. 22, a first throttling device 114 is disposed on the first heat exchange pipeline, a first bypass pipeline connected in parallel with the first heat exchange pipeline is provided with a first control valve 116, a second throttling device 118 is disposed on the second heat exchange pipeline, a second bypass pipeline connected in parallel with the second heat exchange pipeline is provided with a second control valve 120, a refrigerant heating device 124 is disposed on a gas-liquid separator corresponding to the gas return end on the pipeline between the exhaust end and the four-way valve 104, and an electric auxiliary heating assembly 122 is further disposed on the indoor side.

In the embodiment, the normally closed one-way electromagnetic stop valve and the second electronic expansion valve are arranged in parallel or the normally closed two-way electromagnetic stop valve and the second electronic expansion valve are arranged in parallel, so that the liquid impact risk during defrosting operation is favorably improved.

As shown in fig. 23, an operation control method according to an embodiment of the present invention is applied to the air conditioner described in the above embodiment, and includes:

step 2302: the air conditioner operates in a heating mode, and the heating mode is switched to a defrosting mode or an electric auxiliary heating assembly is switched on in the heating mode according to the obtained working condition parameters;

and 2306, in the defrosting mode, controlling a four-way valve to maintain the conduction direction unchanged, and controlling to open a control valve between the indoor heat exchanger and the outdoor heat exchanger to conduct a corresponding bypass pipeline.

The working condition parameters comprise temperature working condition parameters and/or time working condition parameters.

In the above embodiment, optionally, the method further includes: and if the electric auxiliary heating assembly is started in the heating mode, continuously acquiring the working condition parameters so as to continuously detect whether the heating mode is switched to the defrosting mode according to the working condition parameters.

In this embodiment, if the current risk of frosting of the outdoor heat exchanger is determined according to the operating condition parameters, that is, the outdoor heat exchanger enters a frosting detection stage, at this time, the corresponding defrosting start condition and the auxiliary heating start condition are determined, so as to continuously detect the real-time operating condition parameters in the frosting detection stage, so as to execute the corresponding control operation when the operating condition parameters are matched with one of the defrosting start condition or the auxiliary heating start condition, on one hand, at the stage when the frosting risk is detected but the frosting condition is not reached, because the heating effect of the air conditioner is reduced due to the frosting limitation, the electric auxiliary heating assembly can be started first, so as to improve the heating effect under the operating condition with the frosting risk, and further improve the air outlet temperature of the indoor unit and the heating effect of the room, on the other hand, by setting the defrosting start condition and the auxiliary heating start condition, the time point entering the frosting mode can be accurately evaluated, therefore, the defrosting mode can be prevented from lasting too long, and the normal use of a user is influenced.

In the foregoing embodiment, optionally, the control valve includes a first electromagnetic shutoff valve and a second electromagnetic shutoff valve respectively disposed on two sides of the outdoor heat exchanger, the first electromagnetic shutoff valve is disposed near the indoor heat exchanger, the second electromagnetic shutoff valve is disposed near the four-way valve, and the air conditioner operates in the heating mode, and further includes: in the heating mode, controlling the first electromagnetic stop valve to be closed to stop the corresponding first bypass pipeline; and controlling the second electromagnetic stop valve to be opened to enable the corresponding second bypass pipeline to be communicated, wherein the second electromagnetic stop valve is a one-way electromagnetic stop valve or a two-way electromagnetic stop valve.

In this embodiment, in the heating mode, the first electromagnetic stop valve is controlled to be closed to stop the corresponding first bypass pipeline, the heating function is realized by adjusting the first throttling device on the parallel pipeline, and the second electromagnetic stop valve is controlled to be opened to conduct the corresponding second bypass pipeline, so as to ensure the reliability of refrigerant circulation between the outdoor heat exchanger and the four-way valve.

In the foregoing embodiment, optionally, the controlling to open the control valve between the indoor heat exchanger and the outdoor heat exchanger to conduct the corresponding bypass line specifically includes: controlling the first electromagnetic stop valve to be opened to enable the first bypass pipeline to be communicated; and controlling the second electromagnetic valve to be closed, and stopping the second bypass pipeline.

In the embodiment, on the side where the outdoor heat exchanger is connected with the indoor heat exchanger, a bypass pipeline is connected in parallel with a refrigerant pipeline provided with a throttling device, and a control valve is arranged on the bypass pipeline, when defrosting operation is executed, the first bypass pipeline connected in parallel with the first refrigerant pipeline is controlled to be conducted through the control valve, and the control of the throttling device is combined, so that the pressure difference between the indoor heat exchanger and the outdoor heat exchanger is reduced, and the first bypass pipeline is conducted through first bypass management, so that high-temperature refrigerant on the side of the indoor heat exchanger can rapidly flow to the outdoor heat exchanger, and further, the defrosting effect is realized through heat dissipation of the high-temperature refrigerant.

In the foregoing embodiment, optionally, if the heating mode is switched to the defrosting mode, the method further includes: in the defrosting mode, determining a temperature interval to which the outdoor temperature belongs; determining a corresponding first target opening degree and a corresponding second target opening degree according to the temperature interval; controlling the first throttling device to adjust to the first target opening degree; and controlling the second throttling device to adjust to the second target opening degree.

In the foregoing embodiment, optionally, if the heating mode is switched to the defrosting mode, the method further includes: in the defrosting mode, if the indoor pipe temperature is detected to be greater than or equal to a first temperature threshold value, the indoor fan is controlled to be started, and the rotation speed control of the indoor fan is positively correlated with the indoor pipe temperature; and controlling the outdoor fan to run at a reduced speed.

In this embodiment, in the operation process of the air conditioner, when the pipe temperature of the indoor heat exchanger is detected to be smaller than the first temperature threshold value, the indoor fan is started and can blow cold air indoors, so that the heating effect is influenced, the cold air prevention control rule is set through the indoor fan, the indoor fan is started under the condition that the pipe temperature of the indoor heat exchanger is larger than or equal to the first temperature threshold value, and the rotating speed of the indoor fan is in direct proportion to the pipe temperature of the indoor heat exchanger, so that the better heating effect is achieved.

In the foregoing embodiment, optionally, if the heating mode is switched to the defrosting mode, the method further includes: and in the defrosting mode, controlling to start the electric auxiliary heating assembly.

In this embodiment, at the stage that the frosting risk is detected but the defrosting condition is not reached, because the limit of frosting leads to the heating effect of air conditioner to reduce, consequently can open electric auxiliary heating subassembly earlier to promote the heating effect under the operating mode that has the frosting risk, and then promote the air-out temperature and the room heating effect of indoor set.

In the foregoing embodiment, optionally, if the heating mode is switched to the defrosting mode, the method further includes: and in the defrosting mode, controlling to start the refrigerant heating device.

In this embodiment, set up refrigerant heating device through the exhaust end at the compressor to promote compressor exhaust refrigerant temperature, on the one hand, be favorable to promoting under the mode of heating to indoor heating effect, on the other hand, also be favorable to increasing the heat that the refrigerant that flows to outdoor heat exchanger from indoor heat exchanger carried, and then promote the defrosting effect.

In the foregoing embodiment, optionally, determining, according to the operating condition parameter, to switch from the heating mode to the defrosting mode or to turn on the electric auxiliary heating assembly in the heating mode includes: in the heating mode, detecting that the room temperature enters a first temperature threshold interval; determining a plurality of second temperature threshold intervals corresponding to the first temperature threshold interval; when the outdoor temperature enters any second temperature threshold value interval, respectively determining a defrosting starting condition and an auxiliary heating starting condition corresponding to any second temperature threshold value interval; before starting defrosting operation according to the defrosting starting condition, if the collected working condition parameters are matched with the auxiliary heating starting condition, the electric auxiliary heating assembly is controlled to be started.

In this embodiment, a first temperature threshold interval corresponding to a room temperature and a plurality of second temperature threshold intervals corresponding to the first temperature threshold interval are preset, the second temperature threshold intervals correspond to an outdoor temperature, if it is detected that the room temperature is in the first temperature threshold interval and the outdoor temperature is in any one of the second temperature threshold intervals, a frosting risk is indicated, the frosting detection stage is entered, if a frosting phenomenon occurs and the thickness of a frost layer does not reach a degree of defrosting requirement, at this time, a defrosting start condition and an auxiliary heating start condition corresponding to the second temperature threshold interval are determined, so as to continuously detect a real-time operating condition parameter in the frosting detection stage, so that when the operating condition parameter is matched with one of the defrosting start condition or the auxiliary heating start condition, a corresponding control operation is specified, for example, when the operating condition is matched with the defrosting start condition, then directly get into the mode of defrosting, when opening the condition with the auxiliary heating when matching, then open electric auxiliary heating subassembly earlier, in order to guarantee to indoor heating effect, on the one hand, detect the phenomenon of frosting appearing, but frost layer thickness does not reach the degree that needs the defrosting but does not reach the stage of defrosting condition, because the restriction of frosting leads to the heating effect of air conditioner to reduce, consequently can open electric auxiliary heating subassembly earlier, in order to promote the heating effect before opening the operation of defrosting, on the other hand, open the condition and auxiliary heating through setting up the defrosting, can accurately assess the time point that gets into the mode of defrosting, thereby be favorable to reducing the opening duration of defrosting operation, prevent to influence the normal use of user to the air conditioner.

In the above embodiment, optionally, the determining, according to the operating condition parameter, to switch from the heating mode to the defrosting mode or to turn on the electric auxiliary heating assembly in the heating mode specifically further includes: and in the frosting detection stage, if the variation of the outdoor pipe temperature and/or the variation of the temperature difference between the indoor pipe temperature and the room temperature is detected to meet the defrosting starting condition, switching to the defrosting mode.

In the above-described embodiments, the first and second electrodes may, optionally,

further comprising: and in the defrosting operation executing process, continuously collecting working condition parameters, and switching the defrosting mode to the heating mode if the working condition parameters are detected to meet the condition of quitting defrosting, wherein the absolute threshold of the variation of the outdoor tube temperature in the defrosting starting condition is larger than the absolute threshold of the variation of the outdoor tube temperature in the auxiliary heating starting condition.

In this embodiment, the condition of turning on the electric auxiliary heater is more easily achieved and the defrosting on condition is more difficult to achieve by limiting the absolute threshold of the variation of the outdoor tube temperature in the defrosting on condition to the absolute threshold of the variation of the outdoor tube temperature in the auxiliary heating on condition, so that the requirement of turning on the electric auxiliary heater between defrosting and auxiliary heating indoors can be met.

In the above embodiment, optionally, the method further includes: if the indoor tube is switched back to the heating mode, detecting whether the temperature of the indoor tube is greater than or equal to a second temperature threshold value; and if the temperature of the indoor pipe is less than the second temperature threshold, controlling the electric auxiliary heating assembly to be in an opening state continuously until the temperature of the indoor pipe is increased to be greater than or equal to the second temperature threshold.

In the embodiment, whether the electric auxiliary heating assembly is continuously started or not is determined by detecting the relation between the indoor pipe temperature and the second temperature threshold value after defrosting is finished, so that the problem that the heating temperature of the indoor heat exchanger is slow after defrosting is finished is solved.

In the above embodiment, optionally, the method further includes: the air conditioner runs in a refrigeration mode, and controls the first electromagnetic stop valve to be closed so as to stop the first bypass pipeline; and if the second electromagnetic stop valve is a one-way electromagnetic stop valve, controlling the one-way electromagnetic stop valve to be powered off, and if the second electromagnetic stop valve is a two-way electromagnetic stop valve, controlling the two-way electromagnetic stop valve to be powered on so as to enable the second bypass pipeline to be conducted.

In the embodiment, the independent operation of the cooling mode and the simultaneous operation of the heating mode and the defrosting mode are realized by the combined control of the first electromagnetic stop valve and the second electromagnetic stop valve.

As shown in fig. 24, the operation control method according to the first embodiment of the present invention includes:

step 2402, controlling the air conditioner to operate in a heating mode, controlling a four-way valve to be powered on, controlling a first bidirectional stop valve to be powered off (if the first bidirectional stop valve is set, a second bidirectional stop valve or a one-way electromagnetic stop valve is powered on), adjusting a first throttling device to the opening degree of the heating mode (if the first bidirectional stop valve is set, the second throttling device is adjusted to the opening degree of the heating mode), starting an outdoor fan and a compressor to operate, and operating an indoor fan according to a cold air prevention rule;

step 2404, continuously detecting the room temperature, the indoor pipe temperature, the outdoor pipe temperature and the outdoor temperature to determine whether to switch from the heating mode to the defrosting mode;

step 2406, if the defrosting mode is switched, the four-way valve is still powered on, the first bidirectional stop valve is powered on (if the first bidirectional stop valve is set, the second bidirectional stop valve or the one-way electromagnetic stop valve is powered off), the opening of the first throttling device is controlled to be increased (if the first bidirectional stop valve or the one-way electromagnetic stop valve is set, the opening of the second throttling device is adjusted according to the defrosting mode), the outdoor fan is decelerated or stopped, and the indoor fan adjusts and controls to start the electric auxiliary heating assembly and the refrigerant heating device according to the cold air prevention rule;

step 2408, continuously detecting the indoor tube temperature, the outdoor tube temperature and the defrosting time in the defrosting mode, and if the defrosting exit condition is met, exiting the defrosting mode and continuing to operate in the heating mode.

As shown in fig. 25, an operation control method according to a second embodiment of the present invention includes:

step 2502, controlling the air conditioner to operate in a heating mode, controlling the four-way valve to be powered on, controlling the first bidirectional stop valve to be powered off (if the first bidirectional stop valve is set, the second bidirectional stop valve or the one-way electromagnetic stop valve is powered on), adjusting the first throttling device to the opening degree of the heating mode (if the first throttling device is set, the second throttling device is adjusted to the opening degree of the heating mode), starting the outdoor fan and the compressor to operate, and operating the indoor fan according to a cold-proof rule;

step 2504, continuously detecting the room temperature, the indoor pipe temperature, the outdoor pipe temperature and the outdoor temperature to determine whether to switch from the heating mode to the defrosting mode;

step 2506, if the defrosting mode is switched, the four-way valve is still powered on, the first bidirectional stop valve is powered on (if the first bidirectional stop valve is set, the second bidirectional stop valve or the one-way electromagnetic stop valve is powered off), the opening degree of the first throttling device is controlled to be increased (if the first bidirectional stop valve or the one-way electromagnetic stop valve is set, the opening degree of the second throttling device is adjusted according to the defrosting mode), the speed of the outdoor fan is reduced or the outdoor fan is stopped, and the indoor fan adjusts and controls to start the electric auxiliary heating assembly and the refrigerant heating device according to the;

step 2508, continuously detecting the indoor tube temperature, the outdoor tube temperature and the defrosting time in the defrosting mode, if the defrosting exit condition is met, exiting the defrosting mode, continuing to operate in the heating mode, after the heating mode is returned, detecting whether the indoor tube temperature is greater than or equal to a second temperature threshold, and if the indoor tube temperature is less than the second temperature threshold, continuing to start the electric auxiliary heating assembly.

As shown in fig. 26, an operation control method according to a third embodiment of the present invention includes:

step 2602, controlling the air conditioner to operate in a heating mode, controlling the four-way valve to be powered on, controlling the first bidirectional stop valve to be powered off (if the first bidirectional stop valve is set, the second bidirectional stop valve or the one-way electromagnetic stop valve is powered on), adjusting the first throttling device to the opening degree of the heating mode (if the first bidirectional stop valve is set, the second throttling device is adjusted to the opening degree of the heating mode), starting the outdoor fan and the compressor to operate, and operating the indoor fan according to a cold-proof rule;

step 2604, continuously detecting the room temperature, the indoor pipe temperature, the outdoor pipe temperature and the outdoor temperature to determine whether to start the electric auxiliary heating assembly in the heating mode;

step 2606, if the electric auxiliary heating assembly is started, continuously detecting the room temperature, the indoor pipe temperature, the outdoor pipe temperature and the outdoor temperature, and determining whether to switch from the heating mode to the defrosting mode according to the change rate of the outdoor pipe temperature and/or the change rate of the indoor pipe temperature;

step 2608, if the defrosting mode is switched, the four-way valve is still powered on, the first bidirectional stop valve is powered on (if the first bidirectional stop valve is set, the second bidirectional stop valve or the one-way electromagnetic stop valve is powered off), the opening degree of the first throttling device is controlled to be increased (if the first bidirectional stop valve or the one-way electromagnetic stop valve is set, the opening degree of the second throttling device is adjusted according to the defrosting mode), the outdoor fan is decelerated or stopped, and the indoor fan is adjusted and controlled to turn on the electric auxiliary heating assembly and the refrigerant heating device according to the cold air prevention rule;

step 2610, continuously detecting indoor tube temperature, outdoor tube temperature and defrosting duration in the defrosting mode, if meeting defrosting exit conditions, exiting the defrosting mode, and continuing to operate in the heating mode, after returning to the heating mode, detecting whether the indoor tube temperature is greater than or equal to a second temperature threshold, if less than the second temperature threshold, continuing to start the electric auxiliary heating assembly.

As shown in fig. 27, an operation control method according to a fourth embodiment of the present invention includes:

in step 2702, the air conditioner operates in a refrigeration mode, the four-way valve is controlled to be powered off to change the flow direction of the refrigerant, the first bidirectional stop valve is powered off (if the first bidirectional stop valve is set, the second bidirectional stop valve is powered on or the one-way stop valve is powered off), the first throttling device is adjusted to the opening degree of the refrigeration mode, and the outdoor fan, the indoor fan and the compressor are started to operate.

As shown in fig. 28, an operation control device 280 according to an embodiment of the present invention includes: a memory 2804 and a processor 2802; a memory 2804 for storing program code; a processor 2802 to invoke program code to perform: the steps of the method of any of the above embodiments.

An air conditioner according to an embodiment of the present invention includes: the operation control device 280 provided in the above embodiment.

A computer-readable storage medium according to an embodiment of the present invention, has a computer program stored thereon, which, when executed, implements the steps of the operation control method described in any one of the above.

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 media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

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 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 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 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 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.

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;

a first interface and a second interface in the four-way valve are respectively connected to an exhaust end and an air return end of the compressor;

the outdoor heat exchanger and the indoor heat exchanger are connected through a first refrigerant pipeline, one end, far away from the first refrigerant pipeline, of the outdoor heat exchanger is connected to a third interface of the four-way valve through a second refrigerant pipeline, and one end, far away from the first refrigerant pipeline, of the indoor heat exchanger is connected to a fourth interface of the four-way valve through a third refrigerant pipeline;

a throttling device arranged on the first refrigerant pipeline or the first refrigerant pipeline and the second refrigerant pipeline,

the bypass pipeline is connected in parallel with the refrigerant pipeline provided with the throttling device;

the controller is respectively electrically connected with the throttling device and a control valve arranged on the bypass pipeline, and after the heating mode is switched to the defrosting mode, the controller controls the four-way valve to keep the conduction direction unchanged, controls the control valve to be opened so as to conduct the bypass pipeline and controls and adjusts the opening degree of the throttling device to a specified opening degree; the throttling device comprises a valve seat and a valve needle which is controlled to move back and forth through excitation, an orifice matched with the valve needle is arranged on the valve seat so as to limit the flow area of a refrigerant by the valve needle and the orifice,

wherein from a first opening to a second opening, the flow area increases according to a first rate, from the second opening, the flow area increases according to a second rate, the second rate being greater than the first rate;

the operation control device is configured to operate the air conditioner in a heating mode, and determine to switch the heating mode to a defrosting mode or turn on an electric auxiliary heating assembly in the heating mode according to the acquired working condition parameters;

in the defrosting mode, a four-way valve is controlled to maintain the conduction direction unchanged, and a control valve between the indoor heat exchanger and the outdoor heat exchanger is controlled to be opened so as to conduct a corresponding bypass pipeline;

the method for determining whether the heating mode is switched to the defrosting mode or the electric auxiliary heating assembly is turned on in the heating mode according to the acquired working condition parameters specifically comprises the following steps:

in the heating mode, detecting that the room temperature enters a first temperature threshold interval;

determining a plurality of second temperature threshold intervals corresponding to the first temperature threshold interval;

when the outdoor temperature enters any second temperature threshold value interval, respectively determining a defrosting starting condition and an auxiliary heating starting condition corresponding to any second temperature threshold value interval;

before starting defrosting operation according to the defrosting starting condition, if the collected working condition parameters are matched with the auxiliary heating starting condition, the electric auxiliary heating assembly is controlled to be started.

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

the control valve is used for controlling the on-off of the bypass pipeline; and after the heating mode is switched to the defrosting mode, the controller controls the control valve which is connected with the first refrigerant pipeline in parallel to be opened so as to conduct the corresponding bypass pipeline.

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

and the refrigerant heating device is arranged on a pipeline between the exhaust end and the four-way valve and/or on a gas-liquid separator corresponding to the gas return end and is used for being started in a defrosting mode so as to heat the refrigerant discharged by the compressor and/or heat the refrigerant returning to the compressor.

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

and the electric auxiliary heating assembly is arranged corresponding to the indoor heat exchanger, is electrically connected with the controller and is used for being started in the defrosting mode.

5. The air conditioner according to any one of claims 1 to 4,

the outdoor heat exchanger is formed of a single row heat exchange tube construction.

6. The air conditioner according to any one of claims 1 to 4,

the outdoor heat exchanger is formed of a multi-row heat exchange tube configuration.

7. The air conditioner according to any one of claims 1 to 4, further comprising:

the outdoor fan is arranged opposite to the outdoor heat exchanger and is electrically connected with the controller;

an indoor fan which is arranged opposite to the indoor heat exchanger and is electrically connected with the controller,

in the defrosting mode, the controller controls the outdoor fan to reduce the speed and controls the indoor fan to operate according to a cold air prevention rule.

8. The air conditioner according to any one of claims 1 to 4,

the throttling device is an electronic expansion valve;

the control valve is an electromagnetic stop valve.

9. The air conditioner according to claim 8,

a first electronic expansion valve is arranged on the first refrigerant pipeline, and a second electronic expansion valve is arranged on the second refrigerant pipeline;

a two-way electromagnetic stop valve is arranged on a first bypass pipeline which is connected with the first refrigerant pipeline in parallel, a one-way electromagnetic stop valve or a two-way electromagnetic stop valve is arranged on a second bypass pipeline which is connected with the second refrigerant pipeline in parallel,

if the second bypass pipeline is provided with the one-way electromagnetic stop valve, the one-way conduction direction of the one-way electromagnetic stop valve is from the four-way valve to the direction of the outdoor heat exchanger.

10. An operation control method applied to the air conditioner according to any one of claims 1 to 9, characterized by comprising:

the air conditioner operates in a heating mode, and the heating mode is switched to a defrosting mode or an electric auxiliary heating assembly is switched on in the heating mode according to the obtained working condition parameters;

11. The operation control method according to claim 10, characterized by further comprising:

and if the electric auxiliary heating assembly is started in the heating mode, continuously acquiring the working condition parameters so as to continuously detect whether the heating mode is switched to the defrosting mode according to the working condition parameters.

12. The operation control method according to claim 10, wherein the control valve includes a first electromagnetic cut-off valve and a second electromagnetic cut-off valve respectively disposed at both sides of the outdoor heat exchanger, the first electromagnetic cut-off valve is disposed adjacent to the indoor heat exchanger, the second electromagnetic cut-off valve is disposed adjacent to a four-way valve, and the air conditioner operates in the heating mode, and further comprising:

in the heating mode, controlling the first electromagnetic stop valve to be closed to stop the corresponding first bypass pipeline; and

the second electromagnetic stop valve is controlled to be opened to lead the corresponding second bypass pipeline to be communicated,

the second electromagnetic stop valve is a one-way electromagnetic stop valve or a two-way electromagnetic stop valve.

13. The operation control method according to claim 12, wherein the controlling opens a control valve between the indoor heat exchanger and the outdoor heat exchanger to conduct a corresponding bypass line, and specifically includes:

controlling the first electromagnetic stop valve to be opened to enable the first bypass pipeline to be communicated;

and controlling the second electromagnetic stop valve to be closed, and stopping the second bypass pipeline.

14. The operation control method according to claim 10, wherein a first throttling device is provided on the first refrigerant pipe, a second throttling device is provided on the second refrigerant pipe, and if the heating mode is switched to the defrosting mode, the method further comprises:

in the defrosting mode, determining a temperature interval to which the outdoor temperature belongs;

determining a corresponding first target opening degree and a corresponding second target opening degree according to the temperature interval;

controlling the first throttling device to adjust to the first target opening degree;

and controlling the second throttling device to adjust to the second target opening degree.

15. The operation control method according to claim 10, further comprising, if switching from the heating mode to the defrosting mode:

in the defrosting mode, if the indoor pipe temperature is detected to be greater than or equal to a first temperature threshold value, controlling to start an indoor fan, wherein the rotation speed control of the indoor fan is positively correlated with the indoor pipe temperature; and

and controlling the outdoor fan to run at a reduced speed.

16. The operation control method according to claim 10, further comprising, if switching from the heating mode to the defrosting mode:

and in the defrosting mode, controlling to start the electric auxiliary heating assembly.

17. The operation control method according to claim 10, wherein the refrigerant heating device is disposed on a pipeline between the exhaust end and the four-way valve and/or on a gas-liquid separator corresponding to the gas return end, and further comprises, if the heating mode is switched to the defrosting mode:

and in the defrosting mode, controlling to start the refrigerant heating device.

18. The operation control method according to any one of claims 10 to 17, wherein the determining to switch from the heating mode to the defrosting mode or to turn on the electric auxiliary heating assembly in the heating mode according to the operating condition parameter further includes:

in the frosting detection stage, if the variation of the outdoor pipe temperature and/or the variation of the temperature difference between the indoor pipe temperature and the room temperature are detected to meet the defrosting starting condition, the defrosting mode is switched,

wherein an absolute threshold of a variation amount of the outdoor tube temperature in the defrosting on condition is greater than an absolute threshold of a variation amount of the outdoor tube temperature in the auxiliary heating on condition.

19. The operation control method according to any one of claims 10 to 17, characterized by further comprising:

and continuously collecting working condition parameters in the defrosting operation executing process, and switching the defrosting mode back to the heating mode if the condition parameters are detected to meet the condition of quitting defrosting.

20. The operation control method according to claim 16, characterized by further comprising:

if the indoor tube is switched back to the heating mode, detecting whether the temperature of the indoor tube is greater than or equal to a second temperature threshold value;

and if the temperature of the indoor pipe is less than the second temperature threshold, controlling the electric auxiliary heating assembly to be in an opening state continuously until the temperature of the indoor pipe is increased to be greater than or equal to the second temperature threshold.

21. The operation control method according to claim 12 or 13, characterized by further comprising:

the air conditioner runs in a refrigeration mode, and controls the first electromagnetic stop valve to be closed so as to stop the first bypass pipeline;

and if the second electromagnetic stop valve is a one-way electromagnetic stop valve, controlling the one-way electromagnetic stop valve to be powered off, and if the second electromagnetic stop valve is a two-way electromagnetic stop valve, controlling the two-way electromagnetic stop valve to be powered on so as to enable the second bypass pipeline to be conducted.

22. An operation control device adapted for an air conditioner, comprising: a processor capable of implementing the steps defined by the operation control method of any one of claims 10 to 21 when executing the computer program.

23. An air conditioner, comprising:

the operation control device according to claim 22.

24. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when executed, implements the steps of the operation control method according to any one of claims 10 to 21.