CN110486917A

CN110486917A - Operating control device and method, air conditioner and computer readable storage medium

Info

Publication number: CN110486917A
Application number: CN201910782388.8A
Authority: CN
Inventors: 蒋运鹏; 许永锋; 李宏伟; 李华勇; 吴晓鸿; 黄志林; 张嘉诚
Original assignee: Midea Group Co Ltd; GD Midea Heating and Ventilating Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Heating and Ventilating Equipment Co Ltd; Guangdong Midea HVAC Equipment Co Ltd
Priority date: 2019-08-23
Filing date: 2019-08-23
Publication date: 2019-11-22
Anticipated expiration: 2039-08-23
Also published as: CN110486917B

Abstract

The invention proposes a kind of operating control device and methods, air conditioner and computer readable storage medium, and wherein operating control device includes: memory, for storing computer program；Processor, for executing computer program to realize: obtaining the first temperature value of the input end of heat exchanger and the second temperature value of outlet end；According to the first temperature value and second temperature value, the operating status of electric expansion valve is determined；In the case where being exception based on operating status, control shut-off valve is in the open state.Operating control device provided by the invention can prevent the medium belt liquid when the electric expansion valve of refrigeration system occurs abnormal, in air injection enthalpy-increasing flow path from entering the jet injury of mouth of compressor or even destroying compressor, use refrigeration system safer.

Description

Operating control device and method, air conditioner and computer readable storage medium

Technical field

The present invention relates to air-conditioning technical fields, in particular to a kind of operating control device and a kind of operation controlling party Method, a kind of air conditioner and a kind of computer readable storage medium.

Background technique

Energy-efficient requirement is improved in field of air conditioning, traditional air-conditioning system is no longer satisfied existing power conservation requirement.Especially , in low temperature environment heating operation, the reduction of refrigerant circulation seriously affects the fan-out capability of air-conditioning system, therefore field of air conditioning for it Develop air injection enthalpy-increasing technology.

It needs the steam by generating to enter directly into compressor middle pressure chamber since air injection enthalpy-increasing is run, is directly compressed, Therefore the refrigerant that strict demand enters compressor was hot gaseous coolant.If hot refrigerant of being better than cannot be accurately controlled, overheat Refrigerant band liquid is injected directly into compressor middle pressure chamber, can there is the risk caused to compressor scroll plate compared with macrolesion.

Summary of the invention

The present invention is directed at least solve one of the technical problems existing in the prior art.

For this purpose, first aspect present invention provides a kind of operating control device.

Second aspect of the present invention provides a kind of progress control method.

Third aspect present invention provides a kind of air conditioner.

Fourth aspect present invention provides a kind of computer readable storage medium.

In view of this, according to the first object of the present invention, proposing a kind of operating control device, it is used for refrigeration system, Refrigeration system includes: compressor, the primary flow path being connected with the gas outlet of compressor and gas returning port, heat exchanger and air injection enthalpy-increasing stream Road, wherein the entrance of air injection enthalpy-increasing flow path is connected with primary flow path, air injection enthalpy-increasing flow path outlet respectively with the jet of compressor Mouth is connected and is connected by shut-off valve with gas returning port, and air injection enthalpy-increasing flow path is disposed with electric expansion valve and heat exchanger； Operating control device includes: memory, for storing computer program；Processor, for executing computer program to realize: obtaining Take the first temperature value of the input end of heat exchanger and the second temperature value of outlet end；According to the first temperature value and second temperature value, Determine the operating status of electric expansion valve；In the case where being exception based on operating status, control shut-off valve is in the open state.

The operating control device of refrigeration system provided by the invention, in refrigeration system normal heating process, compressor is produced Raw high-pressure medium is discharged by the gas outlet of compressor, and after carrying out heat release by primary flow path, pressure medium is reduced via return-air Mouth is back to compressor, and in medium transmittance process, partial high pressure medium enters air injection enthalpy-increasing flow path by primary flow path, with heat exchange Device heat exchange, pressure medium reduce, and are back to compressor by puff prot after pressure medium in formation, play air injection enthalpy-increasing, reduce energy The effect of source loss.Further, by adjust the electric expansion valve that is arranged on air injection enthalpy-increasing flow path can control medium into Enter the flow of air injection enthalpy-increasing flow path, it is ensured that into puff prot medium be gaseous coolant, and then guarantee system capability promotion and Reliability.But if electronic expansion defective valve, it is excessive to may cause air injection enthalpy-increasing flow path refrigerant, causes liquid refrigerants direct Spray into that compressor compresses are intracavitary leads to compressor damage.

Operating control device provided by the present application passes through heat exchanger input end and outlet end on detection air injection enthalpy-increasing flow path First temperature value and second temperature value, further judge that electric expansion valve whether there is by the first temperature value and second temperature value Abnormal, when electric expansion valve occurs abnormal, opening stop valve opens the access of air injection enthalpy-increasing flow path and gas returning port, due to returning Port is in its pressure of the end of primary flow path lower than the pressure at puff prot, therefore the medium in air injection enthalpy-increasing flow path can be via returning Port is back to compressor, and the middle pressure chamber damage for preventing the medium belt liquid in air injection enthalpy-increasing flow path from entering compressor even destroys pressure Contracting machine ensure that refrigeration system reliability of operation.

Specifically, refrigeration system include: air injection enthalpy-increasing compressor, with the gas outlet of air injection enthalpy-increasing compressor and gas returning port phase The primary flow path of connection, heat exchanger and air injection enthalpy-increasing flow path, indoor heat exchanger, outdoor heat exchanger and gas-liquid separator.Compressor Gas outlet is connected with four-way reversing valve, and under heating mode, refrigerant enters indoor heat exchange by four-way reversing valve in primary flow path Device enters the first pipeline in heat exchanger by throttle valve, is returning to compressor by outdoor heat exchanger, gas-liquid separator Gas returning port；The entrance of air injection enthalpy-increasing flow path is connected the refrigerant got in primary flow path with the outlet of the first pipeline of heat exchanger, The second pipeline that heat exchanger is entered using electric expansion valve, is returned in the puff prot of compressor, jet by the second pipeline Another branch of increasing enthalpy flow path has shut-off valve by the second piping connection, and the return-air of compressor is then returned to through gas-liquid separator Mouthful.

Operating control device provided by the present application, by the inlet temperature and outlet temperature of the second pipeline of heat exchanger, really After determining electric expansion valve exception, control shut-off valve is opened, and then the refrigerant in air injection enthalpy-increasing flow path is guided to gas returning port and is returned to Compressor, and then ensure that system reliability of operation, also guarantee the usage experience of user.

In addition, the operating control device in the above-mentioned technical proposal provided according to the present invention, can also have following additional Technical characteristic:

In the above-mentioned technical solutions, processor determines that electronics is swollen for realizing according to the first temperature value and second temperature value The step of operating status of swollen valve, specifically includes: calculating the difference of second temperature value and the first temperature value；Based on difference less than In the case where one threshold value, the aperture of electric expansion valve is turned down；Aperture based on electric expansion valve is adjusted to minimum, and difference is less than In the case where one threshold value, control shut-off valve is opened.

In the technical scheme, judge whether electric expansion valve occurs according to the difference of second temperature value and the first temperature value It is abnormal.When difference is lower than first threshold, then the medium in flow path did not reached heat request, then by turning electric expansion valve down Aperture makes system restore to operate normally, and reaches the degree of superheat requirement of system；If the aperture of electric expansion valve is adjusted to minimum, And second temperature value and the difference of the first temperature value then tentatively judge that electric expansion valve may be abnormal still less than first threshold, It controls shut-off valve to open, the system coolant media of allowing first flows to the lower low pressure of pressure and surveys, by returning pressure after gas-liquid separator Contracting machine gas returning port prevents the medium belt liquid in air injection enthalpy-increasing flow path from entering jet injury of mouth or even destroys compressor.

In the case that opening time in any of the above-described technical solution based on shut-off valve reaches preset duration, the is obtained The current difference of two temperature values and the first temperature value, and the aperture of electric expansion valve is adjusted to maximum；Guarantor based on current difference Hold it is constant in the case where, determine that the operating status of electric expansion valve is abnormal.

In the technical scheme, after opening stop valve, further determine that whether electric expansion valve is abnormal, specifically, this mistake Journey guarantees that system other parameters are constant, and the opening time of timing shut-off valve reaches preset duration, and system enters temperature operation at this time, The current difference of record second temperature value at this time and the first temperature value, and control electronic expansion valve opening and increase until unlatching is arrived Maximum value, the flow by tuning up electric expansion valve are rinsed the flow path of electric expansion valve, so if it is blockage problem Available alleviation, then monitor second temperature value at this time and the first temperature value difference whether with the current difference that records before It remains unchanged, if difference still maintains constant, determines the operating status of electric expansion valve for exception, then control shut-off valve holding Open state, so that user can also continue to using air-conditioning.Whether exception can occur to electric expansion valve with this solution It is verified, it is abnormal can to find that electric expansion valve occurs in time, avoids refrigeration system compressor damaged.

In any of the above-described technical solution, it is preferable that processor for realizing according to the first temperature value and second temperature value, The step of determining the operating status of electric expansion valve is specific further include: in the case that the size based on current difference changes, Determine electric expansion valve operating status be it is normal, control shut-off valve close and adjust the aperture of electric expansion valve.

In the technical scheme, control electronic expansion valve opening increase until open arrive maximum value, if second temperature value with The difference of first temperature value is changed, then determines that electric expansion valve is in effective status, be further turned off shut-off valve, is disconnected The access of air injection enthalpy-increasing flow path and gas returning port makes air injection enthalpy-increasing flow path be back to compressor via puff prot, continues to play jet Increasing enthalpy, energy-efficient technical effect.Program multiple authentication, judges whether electric expansion valve can work normally, and prevents mistake Sentence, saves maintenance and repair cost.

In any of the above-described technical solution, it is preferable that processor changes for realizing the size based on current difference In the case where, before controlling the step of shut-off valve closes and adjusts the aperture of electric expansion valve, further includes: control electronic expansion Threshold switch preset times.

In the technical scheme, determine electric expansion valve be in effective status can normal use in the case where, by opening Electric expansion valve is closed, coolant media washes away electronic expansion valve body flow path, and air injection enthalpy-increasing flow path can rapidly adapt to working condition, Prevent electric expansion valve from influencing to work normally because blocking simultaneously.

In any of the above-described technical solution, it is preferable that processor for realizing according to the first temperature value and second temperature value, The step of determining the operating status of electric expansion valve, specifically further include: first threshold is more than or equal to based on difference, and is less than or equal to In the case where second threshold, control refrigeration system is operated normally；First threshold, second threshold are constant；Shut-off valve cuts for single-pass Only valve.

In the technical scheme, by comparing difference and first threshold and second threshold, more can quickly sentence Whether disconnected refrigeration system is in the state of normal work, and first threshold and second threshold are constant, are convenient for difference and first Threshold value and second threshold compare, and keep processor control efficiency higher, by the setting of one-way stop valve, prevent medium from flowing backwards shadow Ring the normal operation of refrigeration system and air injection enthalpy-increasing flow path.

In any of the above-described technical solution, it is preferable that processor is also used to realize: being abnormal situation based on operating status Under, issue abnormal prompt.

In the technical scheme, when judging that electric expansion valve breaks down, capable of emitting abnormal prompt, in order to user or Maintenance personal has found failure in time, can repair in time, prevent compressor injury, it is ensured that refrigeration system can normally make With.

According to the second object of the invention, it is also proposed that a kind of progress control method is used for refrigeration system, refrigeration system It include: compressor, the primary flow path being connected with the gas outlet of compressor and gas returning port, heat exchanger and air injection enthalpy-increasing flow path, wherein The entrance of air injection enthalpy-increasing flow path is connected with primary flow path, and the outlet of air injection enthalpy-increasing flow path is connected with the puff prot of compressor respectively It is connected with by shut-off valve with gas returning port, air injection enthalpy-increasing flow path is disposed with electric expansion valve and heat exchanger；Operation control Method includes: the first temperature value for obtaining the input end of heat exchanger and the second temperature value of outlet end；According to the first temperature value and Second temperature value determines the operating status of electric expansion valve；In the case where being exception based on operating status, control shut-off valve is in Open state.

The progress control method of refrigeration system provided by the invention, in refrigeration system normal heating process, compressor is produced Raw high-pressure medium is discharged by the gas outlet of compressor, and after carrying out heat release by primary flow path, pressure medium is reduced via return-air Mouth is back to compressor, and in medium transmittance process, partial high pressure medium enters air injection enthalpy-increasing flow path by primary flow path, with heat exchange After device heat exchange, pressure medium is reduced in the process again, and pressure medium is back to compressor by puff prot in formation, plays jet increasing Enthalpy reduces the effect of energy loss.Further, it can be controlled by adjusting the electric expansion valve being arranged on air injection enthalpy-increasing flow path Medium processed enters the flow of air injection enthalpy-increasing flow path, it is ensured that the medium into puff prot is gaseous coolant, and then guarantees system capability Promotion and reliability.But if electronic expansion defective valve, it is excessive to may cause air injection enthalpy-increasing flow path refrigerant, leads to liquid Refrigerant is injected directly into that compressor compresses are intracavitary to lead to compressor damage.

Progress control method provided by the present application can be applicable in refrigeration system, by exchanging heat on detection air injection enthalpy-increasing flow path The first temperature value and second temperature value of device input end and outlet end are further judged by the first temperature value and second temperature value Electric expansion valve is with the presence or absence of abnormal, and when electric expansion valve occurs abnormal, opening stop valve is opened air injection enthalpy-increasing flow path and returned The access of port, since its pressure that gas returning port is in the end of primary flow path is lower than the pressure of puff prot, therefore air injection enthalpy-increasing flow path Interior medium can be back to compressor via gas returning port, prevent the medium belt liquid in air injection enthalpy-increasing flow path from entering the middle pressure of compressor Chamber damage even destroys compressor, ensure that refrigeration system reliability of operation.

Progress control method provided by the present application, by the inlet temperature and outlet temperature of the second pipeline of heat exchanger, really After determining electric expansion valve exception, control shut-off valve is opened, and then the refrigerant in air injection enthalpy-increasing flow path is guided to gas returning port and is returned to Compressor, and then ensure that system reliability of operation, also guarantee the usage experience of user.

In addition, the progress control method in the above-mentioned technical proposal provided according to the present invention, can also have following additional Technical characteristic:

In the above-mentioned technical solutions, it is preferable that according to the first temperature value and second temperature value, determine the fortune of electric expansion valve The step of row state, specifically includes: calculating the difference of second temperature value and the first temperature value；It is less than first threshold based on difference In the case of, turn the aperture of electric expansion valve down；Aperture based on electric expansion valve is adjusted to minimum, and difference is less than first threshold In the case of, control shut-off valve is opened.

In any of the above-described technical solution, it is preferable that according to the first temperature value and second temperature value, determine electric expansion valve Operating status the step of it is specific further include: in the case that the size based on current difference changes, determine electric expansion valve Operating status be it is normal, control shut-off valve close and adjust the aperture of electric expansion valve.

In any of the above-described technical solution, it is preferable that in the case that the size based on current difference changes, controlling Before the step of shut-off valve closes and adjusts the aperture of electric expansion valve, further includes: control electronic expansion threshold switch preset times.

In any of the above-described technical solution, it is preferable that according to the first temperature value and second temperature value, determine electric expansion valve Operating status the step of, specifically further include: based on difference be more than or equal to first threshold, and be less than or equal to second threshold the case where Under, control refrigeration system operates normally；First threshold, second threshold are constant；Shut-off valve is one-way stop valve.

In any of the above-described technical solution, it is preferable that further include: in the case where being exception based on operating status, issue different Often prompt.

Third purpose according to the present invention, it is also proposed that a kind of air conditioner, including refrigeration system and above-mentioned any skill Operating control device described in art scheme.

Refrigeration system includes compressor, the primary flow path being connected with the gas outlet of compressor and gas returning port, heat exchanger and spray Gas increasing enthalpy flow path, wherein the entrance of air injection enthalpy-increasing flow path is connected with primary flow path, the outlet of air injection enthalpy-increasing flow path respectively with compression The puff prot of machine is connected and is connected by shut-off valve with gas returning port, air injection enthalpy-increasing flow path be disposed with electric expansion valve and Heat exchanger.

In the technical scheme, during air conditioner heat-production, the high-pressure medium that compressor generates is discharged by gas outlet, After carrying out heat release by primary flow path, pressure medium, which is reduced, is back to compressor via gas returning port, in medium transmittance process, part High-pressure medium enters air injection enthalpy-increasing flow path by primary flow path, and after heat exchanger heat exchange, pressure medium is reduced in the process again, is formed Middle pressure medium is back to compressor by puff prot, plays the role of air injection enthalpy-increasing, reduces energy loss.Further, pass through The flow that medium enters air injection enthalpy-increasing flow path can be controlled by adjusting the electric expansion valve being arranged on air injection enthalpy-increasing flow path, it is ensured that into The medium for entering puff prot is gaseous coolant.

Air conditioner provided by the present application, by the electric expansion valve of the air injection enthalpy-increasing flow path in detection refrigeration system, there are works When making abnormal, the shut-off valve by controlling air injection enthalpy-increasing flow path is connected to the gas returning port of compressor, in air injection enthalpy-increasing flow path and pressure A bypass is provided between contracting machine, by air injection enthalpy-increasing flow path can the medium of energy band liquid be delivered to the gas returning port of compressor, keep away The compressor for exempting from air conditioner is damaged.Specific work process are as follows: heat exchanger on air injection enthalpy-increasing flow path is detected by control device The first temperature value and second temperature value of input end and outlet end judge electronic expansion by the first temperature value and second temperature value Whether valve works normally, and when electric expansion valve occurs abnormal, opening stop valve opens the logical of air injection enthalpy-increasing flow path and gas returning port Road, since its pressure that gas returning port is in the end of primary flow path is lower than the pressure of puff prot, therefore the medium in air injection enthalpy-increasing flow path It can be back to compressor via gas returning port, and then ensure that system reliability of operation, also guarantee the usage experience of user.

4th purpose according to the present invention, it is also proposed that a kind of computer readable storage medium is stored thereon with calculating Machine program is realized the row control method of above-mentioned any technical solution, therefore is had when computer program is executed by processor There is progress control method whole beneficial effect.

Additional aspect and advantage of the invention will become obviously in following description section, or practice through the invention Recognize.

Detailed description of the invention

Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures Obviously and it is readily appreciated that, in which:

Fig. 1 is the structural schematic diagram of the operating control device of the embodiment of the present invention；

Fig. 2 is the schematic diagram of the refrigeration system of the embodiment of the present invention；

Fig. 3 is the flow chart of the progress control method of the embodiment of the present invention one；

Fig. 4 is the flow chart of the progress control method of the embodiment of the present invention two；

Fig. 5 is the flow chart of the progress control method of the embodiment of the present invention three；

Fig. 6 is the flow chart of the progress control method of the specific embodiment of the invention.

Wherein, the corresponding relationship in Fig. 1 and Fig. 2 between appended drawing reference and component names are as follows:

100 operating control devices, 110 memories, 120 processors, 10 compressors, 12 four-way reversing valves, 14 condensers, 16 Primary flow path electric expansion valve, 18 heat exchangers, 20 electric expansion valves, 22 first temperature sensing packages, 24 second temperature sensing packages, 26 evaporators, 28 Shut-off valve, 30 gas-liquid separators.

Specific embodiment

To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawing and specific real Applying mode, the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application Feature in example and embodiment can be combined with each other.

In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also Implement in a manner of using other than the one described here, therefore, protection scope of the present invention is not by following public tool The limitation of body embodiment.

The operating control device provided according to some embodiments of the invention, operation control are described referring to Fig. 1 to Fig. 6 Method, air conditioner and computer readable storage medium.

As shown in Figure 1, one embodiment of the present of invention proposes a kind of operating control device 100, apply in refrigeration system In, refrigeration system include: compressor 10, the primary flow path being connected with the gas outlet of compressor 10 and gas returning port, heat exchanger 18 and Air injection enthalpy-increasing flow path, wherein the entrance of air injection enthalpy-increasing flow path is connected with primary flow path, the outlet of air injection enthalpy-increasing flow path respectively with pressure The puff prot of contracting machine 10 is connected and is connected by shut-off valve 28 with gas returning port, and it is swollen that air injection enthalpy-increasing flow path is disposed with electronics Swollen valve 20 and heat exchanger 18；Operating control device 100 includes:

Memory 110, for storing computer program；

Processor 120, for executing computer program to realize: obtain heat exchanger 18 input end the first temperature value and The second temperature value of outlet end；According to the first temperature value and second temperature value, the operating status of electric expansion valve 20 is determined；It is based on In the case that operating status is exception, control shut-off valve 28 is in the open state.

The operating control device of refrigeration system provided by the invention, in refrigeration system normal heating process, compressor 10 The high-pressure medium of generation is discharged by 10 gas outlets of compressor, after carrying out heat release by primary flow path, pressure medium reduce via Gas returning port is back to compressor 10, and in medium transmittance process, partial high pressure medium enters air injection enthalpy-increasing flow path by primary flow path, After exchanging heat with heat exchanger 18, pressure medium is reduced in the process again, and pressure medium is back to compressor 10 by puff prot in formation, Play the role of air injection enthalpy-increasing, reduces energy loss.Further, swollen by adjusting the electronics being arranged on air injection enthalpy-increasing flow path Swollen valve 20 can control the flow that medium enters air injection enthalpy-increasing flow path, it is ensured that the medium into puff prot is gaseous coolant, in turn Guarantee the promotion and reliability of system capability.But if electronic expansion defective valve, air injection enthalpy-increasing flow path refrigerant mistake may cause More, causing liquid refrigerants to be injected directly into, compressor compresses are intracavitary to lead to compressor damage.

The setting of operating control device 100 provided by the present application in refrigeration systems, detects heat exchanger on air injection enthalpy-increasing flow path The first temperature value and second temperature value of 18 input ends and outlet end are further judged by the first temperature value and second temperature value Whether electric expansion valve 20 works normally, and when electric expansion valve 20 occurs abnormal, opening stop valve 28 opens air injection enthalpy-increasing stream The access on road and gas returning port, since its pressure that gas returning port is in the end of primary flow path is lower than the pressure of puff prot, therefore jet increases Medium in enthalpy flow path can be back to compressor 10 via gas returning port, prevent the medium belt liquid in air injection enthalpy-increasing flow path from entering compression The middle pressure chamber damage of machine even destroys compressor, ensure that refrigeration system reliability of operation.

In specific embodiment, as shown in Fig. 2, refrigeration system includes: air injection enthalpy-increasing compressor and air injection enthalpy-increasing compressor Primary flow path, heat exchanger and air injection enthalpy-increasing flow path, indoor heat exchanger, outdoor heat exchanger and the gas-liquid that gas outlet is connected with gas returning port Separator.The gas outlet of compressor is connected with four-way reversing valve, and under heating mode, refrigerant passes through four-way reversing valve in primary flow path Indoor heat exchanger is entered, enters the first pipeline in heat exchanger by throttle valve, is passing through outdoor heat exchanger, gas-liquid separation Device returns to the gas returning port of compressor；The entrance of air injection enthalpy-increasing flow path is connected with the outlet of the first pipeline of heat exchanger gets master Refrigerant in flow path, the second pipeline of heat exchanger is entered using electric expansion valve, returns to compressor by the second pipeline In puff prot, another branch of air injection enthalpy-increasing flow path has shut-off valve by the second piping connection, then returns through gas-liquid separator To the gas returning port of compressor.

It is possible to further which the first temperature sensing package 22 is arranged for detecting heat exchange in the input end of the second pipeline of heat exchanger 18 First temperature value of 18 input end of device is arranged the second temperature sensing package 24 in the outlet end of heat exchanger 18 and exports for detecting heat exchanger 18 The second temperature value at end, realization is quick, accurately and real-time obtains the first temperature value and second temperature value, further, this field Any temperature transducer or temperature measuring equipment can be used also to replace the first temperature sensing package 22 and second of the embodiment in technical staff Temperature sensing package 24.

In one embodiment of the invention, it is preferable that processor 120 is for realizing according to the first temperature value and the second temperature Angle value, the step of determining the operating status of electric expansion valve 20, specifically include: calculating the difference of second temperature value and the first temperature value Value；In the case where being less than first threshold based on difference, the aperture of electric expansion valve 20 is turned down；Aperture based on electric expansion valve 20 It is adjusted to minimum, and difference, less than in the case where second threshold, control shut-off valve 28 is opened；Opening time based on shut-off valve 28 reaches In the case where preset duration, the current difference of second temperature value and the first temperature value is obtained, and adjusts electric expansion valve 20 Aperture is to maximum；In the case where remaining unchanged based on current difference, determine that the operating status of electric expansion valve 20 is abnormal.

In this embodiment, to judge whether electric expansion valve occurs according to the difference of second temperature value and the first temperature value different Often.When difference is lower than first threshold, then the medium in flow path did not reached heat request, then by turning opening for electric expansion valve down So that system is restored to operate normally, the degree of superheat for reaching system requires degree；If the aperture of electric expansion valve is adjusted to minimum, and Second temperature value and the difference of the first temperature value then tentatively judge that electric expansion valve may be abnormal, control still less than first threshold Shut-off valve processed is opened, and the system coolant media of allowing first flows to the lower low pressure of pressure and surveys, by returning compression after gas-liquid separator Machine gas returning port prevents the medium belt liquid in air injection enthalpy-increasing flow path from entering jet injury of mouth or even destroys compressor.Opening stop valve Afterwards, further determine that whether electric expansion valve is abnormal, specifically, this process guarantees that system other parameters are constant, timing shut-off valve Opening time reach preset duration, system enters temperature operation at this time, records second temperature value at this time and the first temperature value Current difference, and control electronic expansion valve opening and increase until opening to maximum value, by the flow for tuning up electric expansion valve The flow path of electric expansion valve is rinsed, if it is the so available alleviation of blockage problem, then monitors the second temperature at this time Whether the difference of angle value and the first temperature value remains unchanged with the current difference recorded before, if difference still maintains constant, The operating status for determining electric expansion valve is exception, then controls shut-off valve and keep it turned on, so that user can also continue to Use air-conditioning.Whether can occur exception to electric expansion valve with this solution to verify, can find electronic expansion in time There is exception in valve, avoids refrigeration system compressor damaged.

Specifically, first threshold, can be set as constant by load and medium coolant quantity based on air injection enthalpy-increasing flow path, and first The value range of threshold value is 0 to 5 degree Celsius, keeps the reaction speed of operating control device 100 more sensitive, can timely detect The working condition of electric expansion valve out.

In one embodiment of the invention, it is preferable that processor 120 is for realizing according to the first temperature value and the second temperature Angle value, the step of determining the operating status of electric expansion valve 20, are specific further include:

In the case that size based on current difference changes, determine electric expansion valve 20 operating status be it is normal, Control shut-off valve 28 closes and adjusts the aperture of electric expansion valve 20.

In this embodiment, control 20 aperture of electric expansion valve, which increases until opening, arrives maximum value, if difference is become Change, then determine that electric expansion valve 20 is in effective status, be further turned off shut-off valve 28, disconnects air injection enthalpy-increasing flow path and gas returning port Access, so that air injection enthalpy-increasing flow path is back to compressor 10 via puff prot, continue to play air injection enthalpy-increasing, energy-efficient technology effect Fruit.Program multiple authentication, judges whether electric expansion valve 20 can work normally, and prevents erroneous judgement, saves maintenance and dimension Protect cost.

In one embodiment of the invention, it is preferable that processor 120 occurs for realizing the size based on current difference In the case where variation, before controlling the step of shut-off valve 28 closes and adjusts the aperture of electric expansion valve 20, further includes: control Electric expansion valve 20 switchs preset times.

In this embodiment, determine electric expansion valve 20 be in effective status can normal use in the case where, by opening Electric expansion valve 20 is closed, coolant media washes away 20 valve body flow path of electric expansion valve, and air injection enthalpy-increasing flow path rapidly adapts to working condition, Prevent electric expansion valve 20 from influencing to work normally because blocking simultaneously.

Specifically, preset times can be 1 time or 2 times, by 1 to 2 switch electronic expansion valve 20, can make cold media Matter effectively washes away 20 valve body flow path of electric expansion valve.

In one embodiment of the invention, it is preferable that processor 120 is for realizing according to the first temperature value and the second temperature Angle value, the step of determining the operating status of electric expansion valve 20, specifically further include: first threshold is more than or equal to based on difference, and In the case where second threshold, control refrigeration system is operated normally；First threshold, second threshold are constant；Shut-off valve 28 be one-way stop valve.

In this embodiment, by comparing the temperature difference and first threshold and second threshold, more can quickly judge Whether refrigeration system is in the state of normal work, the load and medium refrigerant of the air injection enthalpy-increasing flow path based on current air-conditioning system Amount, in systems presets first threshold and second threshold, judges the first temperature value according to first threshold and second threshold With the temperature difference of second temperature value whether meet current system normal operation parameter request, and then realize to refrigeration system whether Judged in normal operating condition, timely takes corresponding control measure to realize.Specifically, if the first temperature value It is greater than second threshold with the temperature difference of second temperature value and then illustrates the cold medium flux very little in air injection enthalpy-increasing flow path, even without says Bright electric expansion valve may be abnormal；If the temperature difference of the first temperature value and second temperature value is less than first threshold, specification Liquid content is more in refrigerant, can damage compressor, needs to adjust electric expansion valve, and it is different to confirm whether electric expansion valve occurs Often, the temperature difference of the first temperature value and second temperature value is less than second threshold, and more than or equal in the case where first threshold, then illustrates Current system is in normal operating status, and further first threshold and second threshold are constant.Pass through one-way stop valve 28 Setting, prevent medium from flowing backwards the normal operation for influencing refrigeration system and air injection enthalpy-increasing flow path.

Specifically, the value range of first threshold is 0 to 5 degree Celsius, and the value range of second threshold is 0 to 50 Celsius Degree, the value of second threshold are greater than the value of first threshold.

In one embodiment of the invention, it is preferable that processor 120 is also used to realize: being abnormal based on operating status In the case where, issue abnormal prompt.

In this embodiment, when judging that electric expansion valve 20 breaks down, capable of emitting abnormal prompt, in order to user or Maintenance personal has found failure in time, can repair in time, prevents compressor 10 from damaging, it is ensured that refrigeration system can normally make With.

Specifically, the mode for issuing abnormal prompt is not limited to light warning, audible alarm, fault code prompt etc..Alternatively, Abnormal prompt is sent to the user terminal or the terminal of maintenance personal, to realize on-call maintenance and quickly determine that failure is former Cause.

According to the second aspect of the invention, it is also proposed that a kind of progress control method is used for refrigeration system, refrigeration system packet It includes: compressor 10, the primary flow path being connected with the gas outlet of compressor 10 and gas returning port, heat exchanger 18 and air injection enthalpy-increasing flow path, Wherein, the entrance of air injection enthalpy-increasing flow path is connected with primary flow path, and air injection enthalpy-increasing flow path exports the jet with compressor 10 respectively Mouth is connected and is connected by shut-off valve 28 with gas returning port, and air injection enthalpy-increasing flow path is disposed with electric expansion valve 20 and heat exchange Device 18.

Embodiment one

As shown in figure 3, the process of the progress control method of one embodiment of the present of invention includes:

Step 302, the first temperature value of the input end of heat exchanger and the second temperature value of outlet end are obtained；

Step 304, according to the first temperature value and second temperature value, the operating status of electric expansion valve is determined；

Step 306, in the case where being exception based on operating status, control shut-off valve is in the open state.

Operating control device provided in this embodiment passes through heat exchanger input end and outlet end on detection air injection enthalpy-increasing flow path The first temperature value and second temperature value, further with second temperature value judge whether electric expansion valve is deposited by the first temperature value In exception, when electric expansion valve occurs abnormal, opening stop valve opens the access of air injection enthalpy-increasing flow path and gas returning port, due to Gas returning port is in its pressure of the end of primary flow path lower than the pressure at puff prot, therefore the medium in air injection enthalpy-increasing flow path can be via Gas returning port is back to compressor, and the middle pressure chamber damage for preventing the medium belt liquid in air injection enthalpy-increasing flow path from entering compressor even destroys Compressor ensure that refrigeration system reliability of operation.

Specifically, as shown in Fig. 2, the refrigeration system in the present embodiment includes: air injection enthalpy-increasing compressor and air injection enthalpy-increasing pressure Primary flow path, heat exchanger and air injection enthalpy-increasing flow path, indoor heat exchanger, the outdoor heat exchanger that the gas outlet of contracting machine is connected with gas returning port And gas-liquid separator.The gas outlet of compressor is connected with four-way reversing valve, and under heating mode, refrigerant passes through four-way in primary flow path Reversal valve enters indoor heat exchanger, enters the first pipeline in heat exchanger by throttle valve, is passing through outdoor heat exchanger, gas Liquid/gas separator returns to the gas returning port of compressor；The entrance of air injection enthalpy-increasing flow path is connected with the outlet of the first pipeline of heat exchanger to be obtained The refrigerant in primary flow path is got, the second pipeline of heat exchanger is entered using electric expansion valve, pressure is returned to by the second pipeline In the puff prot of contracting machine, another branch of air injection enthalpy-increasing flow path has shut-off valve by the second piping connection, then through gas-liquid point From the gas returning port that device returns to compressor.

Embodiment two

As shown in figure 4, the process of the progress control method of one embodiment of the present of invention includes:

Step 402, the first temperature value of the input end of heat exchanger and the second temperature value of outlet end are obtained；

Step 404, the difference of second temperature value and the first temperature value is calculated；

Step 406, in the case where being less than first threshold based on difference, the aperture of electric expansion valve is turned down；

Step 408, in the case that the aperture based on electric expansion valve is adjusted to minimum, and difference is less than first threshold, control Shut-off valve is opened；

Step 410, in the case that the opening time based on shut-off valve reaches preset duration, second temperature value and first is obtained The current difference of temperature value, and the aperture of electric expansion valve is adjusted to maximum；

Step 412, in the case where remaining unchanged based on current difference, determine that the operating status of electric expansion valve is different Often, control shut-off valve is in the open state.

Embodiment three

As shown in figure 5, the process of the progress control method of one embodiment of the present of invention includes:

Step 502, the first temperature value of the input end of heat exchanger and the second temperature value of outlet end are obtained；

Step 504, the difference of second temperature value and the first temperature value is calculated；

Step 506, second temperature value is compared with the difference of the first temperature value with first threshold；

Step 508, in the case where being less than first threshold based on difference, the aperture of electric expansion valve is turned down；

Step 510, in the case that the aperture based on electric expansion valve is adjusted to minimum, and difference is less than first threshold, control Shut-off valve is opened；

Step 512, in the case that the opening time based on shut-off valve reaches preset duration, second temperature value and first is obtained The current difference of temperature value, and the aperture of electric expansion valve is adjusted to maximum；

Step 514, judge whether second temperature value and the current difference of the first temperature value change；

Step 516, in the case where remaining unchanged based on current difference, determine that the operating status of electric expansion valve is different Often, control shut-off valve is in the open state, and issues abnormal prompt；

Step 518, in the case that the size based on current difference changes, determine that the operating status of electric expansion valve is Normally, electronic expansion threshold switch preset times are controlled；

In this embodiment, determine electric expansion valve be in effective status can normal use in the case where, pass through switch Electric expansion valve, coolant media wash away electronic expansion valve body flow path, and air injection enthalpy-increasing flow path can rapidly adapt to working condition, together When prevent electric expansion valve from influencing to work normally because blocking.

Step 520, control shut-off valve closes and adjusts the aperture of electric expansion valve；

Step 522, first threshold is more than or equal to based on difference, and less than or equal in the case where second threshold, control is freezed System operates normally.

As shown in Fig. 2, according to one embodiment of present invention, it is also proposed that a kind of air conditioner, including refrigeration system and on Operating control device described in any technical solution stated.

Refrigeration system includes compressor 10, the primary flow path being connected with the gas outlet of compressor 10 and gas returning port, heat exchanger 18 and air injection enthalpy-increasing flow path, wherein the entrance of air injection enthalpy-increasing flow path is connected with primary flow path, the outlet difference of air injection enthalpy-increasing flow path It is connected with the puff prot of compressor 10 and is connected by shut-off valve 28 with gas returning port, air injection enthalpy-increasing flow path is disposed with electricity Sub- expansion valve 20 and heat exchanger 18.

In this embodiment, during air conditioner heat-production, the high-pressure medium that compressor 10 generates is discharged by gas outlet, After carrying out heat release by primary flow path, pressure medium, which is reduced, is back to compressor 10 via gas returning port, in medium transmittance process, portion High-pressure medium is divided to enter air injection enthalpy-increasing flow path by primary flow path, after exchanging heat with heat exchanger 18, pressure medium is reduced in the process again, It presses medium to be back to compressor 10 by puff prot in formation, plays the role of air injection enthalpy-increasing, reduce energy loss.Further Ground can control the stream that medium enters air injection enthalpy-increasing flow path by adjusting the electric expansion valve 20 being arranged on air injection enthalpy-increasing flow path Amount, it is ensured that the medium into puff prot is gaseous coolant.

Air conditioner provided by the present application, by the electric expansion valve of the air injection enthalpy-increasing flow path in detection refrigeration system, there are works When making abnormal, the shut-off valve by controlling air injection enthalpy-increasing flow path is connected to the gas returning port of compressor, in air injection enthalpy-increasing flow path and pressure A bypass is provided between contracting machine 10, by air injection enthalpy-increasing flow path can the medium of energy band liquid be delivered to the return-air of compressor 10 Mouthful, avoid the compressor 10 of air conditioner from being damaged.Specific work process are as follows: detected on air injection enthalpy-increasing flow path by control device The first temperature value and second temperature value of 18 input end of heat exchanger and outlet end are judged by the first temperature value and second temperature value Whether electric expansion valve 20 works normally, and when electric expansion valve 20 occurs abnormal, opening stop valve 28 opens air injection enthalpy-increasing stream The access on road and gas returning port, since its pressure that gas returning port is in the end of primary flow path is lower than the pressure of puff prot, therefore jet increases Medium in enthalpy flow path can be back to compressor 10 via gas returning port, and then ensure that system reliability of operation, also guarantee to use The usage experience at family.

As shown in Fig. 2, further, the refrigeration system of the embodiment, heat exchanger 18 includes two pipelines, wherein the first pipe Road is arranged in primary flow path, and the second pipeline is arranged on air injection enthalpy-increasing flow path, and the input end of the second pipeline passes through electric expansion valve 20 are connected to primary flow path, time that outlet end branch is connected with the puff prot of compressor 10 and passes through shut-off valve 28 and compressor 10 Port is connected, and operating control device is used to detect the first temperature value of the input end of the second pipeline and the second temperature of outlet end Value；Condenser 14, evaporator 26 and primary flow path electric expansion valve 16 are provided in primary flow path, the first pipeline of heat exchanger 18 is in Between condenser 14 and evaporator 26, primary flow path electric expansion valve 16 be in condenser 14 and heat exchanger 18 the first pipeline it Between, air conditioner is exchanged heat, and supply flow rate of the medium in primary flow path can be adjusted；In shut-off valve 28 and compressor 10 It is provided with gas-liquid separator 30 on the connecting pipeline of gas returning port, is returned by gas-liquid separator 30 to via shut-off valve 28 and primary flow path The medium for being back to 10 gas returning port of compressor carries out gas-liquid separation；Four-way reversing valve 12 is additionally provided in primary flow path, as shown in Figure 1, The outbound course of 10 gas outlet high-pressure medium of compressor can be changed by the setting of four-way reversing valve 12, realize air conditioner refrigeration With the switching of heat-production functions.

According to still another embodiment of the invention, it is also proposed that a kind of computer readable storage medium is stored thereon with meter Calculation machine program realizes progress control method described in above-mentioned any technical solution when computer program is executed by processor, because This is with the row control method whole beneficial effect.

In specific embodiment, as shown in Fig. 2, being replaced in the present embodiment for simplified flowchart using number or letter Parameter or component, wherein T1 indicates that the first temperature value, T2 indicate second temperature value, and b indicates that second threshold, a indicate the first threshold Value.In the case that EVV2 indicates that electric expansion valve 20, C indicate that the opening time of shut-off valve 28 reaches preset duration, second temperature The current difference of value and the first temperature value.

The system of the prior art adjusts the size of 2 aperture of EVV by detecting the temperature of T2-T1, to guarantee system capability Promotion and reliability.But if EVV 2 fail, may cause injection road refrigerant it is excessive, cause liquid refrigerants to be injected directly into pressure Lead to compressor damage in contracting machine compression chamber.

The refrigeration system and operating control device that the embodiment provides, as shown in Figure 2 and Figure 6, if detection discovery T2-T1 EVV 2 is closed immediately less than a (a is constant), the situation of change of T2-T1 is continued to test, if can't effectively adjust, immediately It opens valve body (unidirectional stop valve), refrigerant is imported into low-pressure side, refrigerant is allowed to return to compressor after gas-liquid separator 30, Without being returned directly to compressor scroll plate, guarantee the reliability of system.The purpose of the present invention is guarantee that bypass electric expansion valve is different Chang Shi leads to the refrigerant band liquid of bypass.In order to guarantee that it is intracavitary that the refrigerant with liquid is not returned directly to compressor compresses, its refrigerant is led Enter the low-pressure side of system, refrigerant can be walked toward the minimum place of pressure, to guarantee that refrigerant is not returned directly in compressor low pressure chamber, be protected Demonstrate,prove the reliability of compressor.

Specifically, as shown in Fig. 2, refrigeration system includes to have air injection enthalpy-increasing flow path and air injection enthalpy-increasing compressor, jet increases Enthalpy flow path is to take coolant media in primary flow path, is throttled by EVV2, then by heat exchanger, passes through 24 He of the second temperature sensing package The detected value of first temperature sensing package 22 guarantees that superheated steam is injected directly into the middle pressure chamber of compressor to regulate and control the flow of EVV2, Carry out lifting system effect.

As shown in fig. 6, the specific control process of refrigeration system are as follows: firstly, guarantee system stable operation, make b > T2-T1 >= A starts the flow for adjusting EVV2, system is normally transported if it can be restored to b > T2-T1 >=a if detecting T2-T1 < a Row.If EVV2 control completely closes and is not able to satisfy b > T2-T1 >=a, opening stop valve 28 immediately allow system cold media Matter first flows to the lower low pressure of pressure and surveys, by returning compressor return air mouth after gas-liquid separator 30.This process guarantees system Other parameters are constant, wait until system stable operation time T, record T2-T1=c, are then turned on EVV2 to maximum, detect T2-T1 Whether changing, if unchanged or c, then it is assumed that the failure of adjustment of EVV2 keeps the open state of shut-off valve 28 at this time, Guarantee system, which runs and exports lifting system, is in unusual condition operational effect, and issues repair prompt.If T2-T1 is changed, It proves that there are also regulating powers by EVV2, then the open state of shut-off valve 28 is kept, then switch EVV2N times, to be rushed with coolant media Brush valve body flow path guarantees that EVV2 can turn off shut-off valve after normal regulating, adjust EVV2 guarantee system reach b > T2-T1 >=a this State, system are restored to operate normally.

By the refrigeration system and operating control device of the embodiment, injection road coolant media can be drawn by shut-off valve Enter to the lower low-pressure side of pressure；The unlatching of shut-off valve, which can guarantee to spray when road coolant media was not up to heat request, first to be flowed to Low-pressure side guarantees the reliability of compressor；Injection road coolant media did not needed system-down when being not up to heat request, can open Shut-off valve is continued to run by system, system can also reliability service, guarantee user it is unaffected.

Further, the state of EVV2 can also be detected when shut-off valve is opened；And attempt to restore EVV2 to adjustable State.

In the present invention, term " multiple " then refers to two or more, unless otherwise restricted clearly.Term " peace Dress ", " connected ", " connection ", the terms such as " fixation " shall be understood in a broad sense, can also be with for example, " connection " may be a fixed connection It is to be detachably connected, or be integrally connected；" connected " can be directly connected, can also be indirectly connected through an intermediary.It is right For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific conditions.

In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc. Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one reality of the invention It applies in example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or reality Example.Moreover, description particular features, structures, materials, or characteristics can in any one or more of the embodiments or examples with Suitable mode combines.

The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims

1. a kind of operating control device, it is used for refrigeration system, the refrigeration system includes: compressor, goes out with the compressor Primary flow path, heat exchanger and the air injection enthalpy-increasing flow path that port is connected with gas returning port, wherein the entrance of the air injection enthalpy-increasing flow path with The primary flow path is connected, and the outlet of the air injection enthalpy-increasing flow path is connected with the puff prot of the compressor respectively and by cutting Only valve is connected with the gas returning port, and the air injection enthalpy-increasing flow path is disposed with electric expansion valve and the heat exchanger；It is special Sign is that the operating control device includes:

Memory, for storing computer program；

Processor, for executing the computer program to realize:

Obtain the first temperature value of the input end of the heat exchanger and the second temperature value of outlet end；

According to first temperature value and the second temperature value, the operating status of the electric expansion valve is determined；

In the case where being exception based on the operating status, it is in the open state to control the shut-off valve.

2. operating control device according to claim 1, which is characterized in that the processor is for realizing described according to institute The step of stating the first temperature value and the second temperature value, determining the operating status of the electric expansion valve specifically includes:

Calculate the difference of the second temperature value Yu first temperature value；

In the case where being less than first threshold based on the difference, the aperture of the electric expansion valve is turned down；

In the case that aperture based on the electric expansion valve is adjusted to minimum, and the difference is less than the first threshold, control The shut-off valve is opened.

3. operating control device according to claim 2, which is characterized in that the processor is for realizing described according to institute The step of stating the first temperature value and the second temperature value, determining the operating status of the electric expansion valve is specific further include:

In the case that opening time based on the shut-off valve reaches preset duration, the second temperature value and described first is obtained The current difference of temperature value, and the aperture of the electric expansion valve is adjusted to maximum；

In the case where remaining unchanged based on the current difference, determine that the operating status of the electric expansion valve is abnormal.

4. operating control device according to claim 3, which is characterized in that the processor is for realizing described according to institute The step of stating the first temperature value and the second temperature value, determining the operating status of the electric expansion valve is specific further include:

In the case that size based on the current difference changes, determine that the operating status of the electric expansion valve is positive Often, the aperture that the shut-off valve closes and adjusts the electric expansion valve is controlled.

5. operating control device according to claim 4, which is characterized in that the processor is worked as realizing based on described In the case that the size of preceding difference changes, is closed in the control shut-off valve and adjust opening for the electric expansion valve Before the step of spending, further includes:

Control the electronic expansion threshold switch preset times.

6. operating control device according to claim 2, which is characterized in that the processor is for realizing described according to institute The step of stating the first temperature value and the second temperature value, determining the operating status of the electric expansion valve, specifically further include:

It is more than or equal to first threshold based on the difference, and less than or equal in the case where second threshold, controls the refrigeration system It operates normally；

The first threshold, the second threshold are constant；

The shut-off valve is one-way stop valve.

7. operating control device according to any one of claim 1 to 6, which is characterized in that the processor is also used to It realizes: in the case where being exception based on the operating status, issuing abnormal prompt.

8. a kind of progress control method, it is used for refrigeration system, the refrigeration system includes: compressor, goes out with the compressor Primary flow path, heat exchanger and the air injection enthalpy-increasing flow path that port is connected with gas returning port, wherein the entrance of the air injection enthalpy-increasing flow path with The primary flow path is connected, and the outlet of the air injection enthalpy-increasing flow path is connected with the puff prot of the compressor respectively and by cutting Only valve is connected with the gas returning port, and the air injection enthalpy-increasing flow path is disposed with electric expansion valve and the heat exchanger；It is special Sign is that the progress control method includes:

9. progress control method according to claim 8, which is characterized in that described according to first temperature value and described Second temperature value, the step of determining the operating status of the electric expansion valve, specifically include:

10. progress control method according to claim 9, which is characterized in that described according to first temperature value and institute The step of stating second temperature value, determining the operating status of the electric expansion valve is specific further include:

11. progress control method according to claim 10, which is characterized in that described according to first temperature value and institute The step of stating second temperature value, determining the operating status of the electric expansion valve is specific further include:

12. progress control method according to claim 11, which is characterized in that the size based on the current difference occurs In the case where variation, before the step of control shut-off valve closes and adjusts the aperture of the electric expansion valve, also Include:

Control the electronic expansion threshold switch preset times.

13. progress control method according to claim 9, which is characterized in that described according to first temperature value and institute The step of stating second temperature value, determining the operating status of the electric expansion valve, specifically further include:

The first threshold, the second threshold are constant；

The shut-off valve is one-way stop valve.

14. the progress control method according to any one of claim 8 to 13, which is characterized in that further include:

In the case where being exception based on the operating status, abnormal prompt is issued.

15. a kind of air conditioner, which is characterized in that the operation control including refrigeration system and as described in any one of claims 1 to 7 Device processed；

The refrigeration system includes compressor, the primary flow path being connected with the gas outlet of the compressor and the gas returning port, changes Hot device and air injection enthalpy-increasing flow path, wherein the entrance of the air injection enthalpy-increasing flow path is connected with the primary flow path, the air injection enthalpy-increasing The outlet of flow path is connected with the puff prot of the compressor respectively and is connected by shut-off valve with the gas returning port, the spray Gas increasing enthalpy flow path is disposed with electric expansion valve and the heat exchanger.

16. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer program The progress control method as described in any one of claim 8 to 14 is realized when being executed by processor.