CN118031443A - Control method and control device for heat exchange system and heat exchange system - Google Patents
Control method and control device for heat exchange system and heat exchange system Download PDFInfo
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Abstract
The application relates to the technical field of heat exchange systems, and discloses a control method and a control device for a heat exchange system and the heat exchange system. The heat exchange system comprises a heat exchange loop and a refrigerant adjusting branch, the heat exchange loop comprises a compressor, a condenser, a throttling device and an evaporator which are sequentially connected through refrigerant pipelines, a first end of a liquid storage tank of the refrigerant adjusting branch is connected with a return air end of the compressor, and a second end of the liquid storage tank is connected with the refrigerant pipeline between the condenser and the throttling device; the control method comprises the following steps: acquiring operation parameters of a compressor; determining a first target refrigerant weight of the refrigerant in the liquid storage tank according to the operation parameters of the compressor; and adjusting the actual weight of the refrigerant in the liquid storage tank to the weight of the first target refrigerant. According to the embodiment, the refrigerant quantity participating in the heat exchange cycle can be adjusted, so that the refrigerant quantity in the liquid storage tank is matched with the operation working condition of the heat exchange system, the rationality of the refrigerant participating in the heat exchange cycle under different operation working conditions is improved, and the heat exchange performance of the heat exchange system is improved.
Description
Technical Field
The application relates to the technical field of heat exchange systems, and for example relates to a control method and a control device for a heat exchange system and the heat exchange system.
Background
At present, in an air conditioning system, a refrigerant is a main medium for realizing energy transfer of the air conditioning system, the quantity of the refrigerant influences the performance of the air conditioner, the power consumption of the air conditioner is increased due to excessive refrigerant, and the capacity output of the air conditioner is influenced due to insufficient refrigerant. Generally, the air conditioner needs less refrigerant than heating, so that the refrigerant circulating in the condenser can be quickly cooled, the power can be reduced, and the refrigerating speed is higher. The heating refrigerant directly enters the indoor evaporator from the compressor end, and more energy needs to be accumulated and directly released in the evaporator, so that more refrigerant is needed for air conditioning refrigeration compared with heating. The current air conditioner can not adjust the circulation volume of the refrigerant according to the refrigerating or heating requirement, and only the refrigerant is filled in the circulation initially, so that the maximum energy efficiency of the refrigerating or heating of the air conditioner can not be exerted.
In the related art, the opening of the throttling device is regulated to regulate the refrigerant in the cold heat exchange system, and the refrigerant is depressurized, cooled or pressurized and heated, so that the refrigerant state meets the requirement of the indoor heat exchanger, and the heat exchange system is in a relatively good state.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
Because the aperture adjusting capability of the throttling device is limited, the adjusting range is smaller, when the difference of the refrigerants required by the heat exchange system is larger, the throttling device cannot meet the adjusting requirement of the refrigerants, and the performance of the heat exchange system is poorer.
It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the application and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.
The embodiment of the disclosure provides a control method and a control device for a heat exchange system and the heat exchange system, so as to regulate the quantity of refrigerants participating in heat exchange circulation and improve the performance of the heat exchange system.
According to a first embodiment of the present application, there is provided a control method for a heat exchange system, the heat exchange system including a heat exchange circuit and a refrigerant adjusting branch, the heat exchange circuit including a compressor, a condenser, a throttle device and an evaporator sequentially connected by refrigerant lines, a first end of a liquid storage tank of the refrigerant adjusting branch being connected to a return air end of the compressor, a second end of the liquid storage tank being connected to a refrigerant line between the condenser and the throttle device; the control method comprises the following steps: the controller obtains the operation parameters of the compressor; the controller determines the first target refrigerant weight of the refrigerant in the liquid storage tank according to the operation parameters of the compressor; the controller adjusts the actual weight of the refrigerant in the liquid storage tank to the first target weight of the refrigerant.
In some embodiments, the operating parameters of the compressor include an operating frequency of the compressor or a return air temperature of the compressor; the controller determines a first target refrigerant weight of the refrigerant in the liquid storage tank according to the operation parameters of the compressor, and comprises: the controller determines a frequency difference between an operating frequency of the compressor and a preset frequency; the controller obtains the weight of the refrigerant in the liquid storage tank corresponding to the frequency difference; the controller takes the weight of the refrigerant in the liquid storage tank corresponding to the frequency difference as the weight of the first target refrigerant;
Or alternatively
The controller determines a temperature difference between the return air temperature of the compressor and a preset return air temperature; the controller obtains the weight of the refrigerant in the liquid storage tank corresponding to the temperature difference; the controller takes the weight of the refrigerant in the liquid storage tank corresponding to the temperature difference as the weight of the first target refrigerant.
In some embodiments, the controller obtains a refrigerant weight of the refrigerant in the liquid storage tank corresponding to the frequency difference, including calculating the refrigerant weight of the refrigerant in the liquid storage tank corresponding to the frequency difference according to the following formula:
Wherein G is the weight of the refrigerant in the liquid storage tank corresponding to the frequency difference, G 0 is the initial weight of the refrigerant, deltaf is the frequency difference, deltaf 0 is the preset frequency difference, and G is the weight of the refrigerant corresponding to the preset frequency difference.
In some embodiments, the controller calculates the actual weight of the refrigerant in the liquid storage tank as follows: the controller determines the weight of the liquid refrigerant and the weight of the gaseous refrigerant in the liquid storage tank; the controller determines the actual weight of the refrigerant in the liquid storage tank according to the weight of the liquid refrigerant and the weight of the gaseous refrigerant.
In some embodiments, the controller determines a weight of the liquid refrigerant in the liquid storage tank, including calculating the weight of the liquid refrigerant according to the following formula:
G1＝S*ρl*H1
Wherein G 1 is the weight of the liquid refrigerant in the liquid storage tank, S is the cross-sectional area of the cavity of the liquid storage tank, ρ 1 is the density of the liquid refrigerant, and H 1 is the height of the liquid refrigerant in the liquid storage tank.
And/or the number of the groups of groups,
The controller determines the weight of the gaseous refrigerant in the liquid storage tank, and the controller calculates the weight of the gaseous refrigerant according to the following formula:
Wherein G 2 is the weight of the gaseous refrigerant in the liquid storage tank, S is the cross-sectional area of the liquid storage tank cavity, P is the pressure value at the top of the liquid storage tank, T is the temperature of the gaseous refrigerant in the liquid storage tank, R is the gas constant, H 1 is the height of the liquid refrigerant in the liquid storage tank, and H is the total height of the liquid storage tank cavity.
In some embodiments, the control method further comprises: the controller determines the weight of a second target refrigerant of the refrigerant in the liquid storage tank when the heat exchange system is in the current running mode; the controller obtains the real-time weight value of the refrigerant in the liquid storage tank; and the controller adjusts the actual weight of the refrigerant in the liquid storage tank to the weight of the second target refrigerant according to the real-time weight value.
In some embodiments, the controller adjusts the actual weight of the refrigerant in the liquid storage tank to a second target refrigerant weight according to the real-time weight value, including: the controller reduces the actual weight of the refrigerant in the liquid storage tank to the weight of the second target refrigerant under the condition that the real-time weight value is larger than the preset weight value; and/or, under the condition that the real-time weight value is smaller than the preset weight value, the controller increases the actual weight of the refrigerant in the liquid storage tank to the second target weight of the refrigerant.
In some embodiments, the control method further comprises: the controller adjusts an operation mode of the compressor according to the real-time weight value.
According to a second embodiment of the present application, there is provided a control device for a heat exchange system, comprising a processor and a memory storing program instructions, characterized in that the processor is configured to execute the control method for a heat exchange system according to any one of the preceding claims when running the program instructions.
According to a third embodiment of the present application, there is provided a heat exchange system including: the heat exchange loop comprises a compressor, a condenser, a throttling device and an evaporator which are sequentially connected through refrigerant pipelines; the first end of the liquid storage tank of the refrigerant adjusting branch is connected with the air return end of the compressor, and the second end of the liquid storage tank is connected with a refrigerant pipeline between the condenser and the throttling device; the control device for a heat exchange system as described above is connected to a heat exchange circuit.
The control method and the control device for the heat exchange system, and the heat exchange system provided by the embodiment of the disclosure can realize the following technical effects:
In this embodiment, one end of the liquid storage tank is connected with the air return end of the compressor, and the other end of the liquid storage tank is connected with the refrigerant pipeline between the condenser and the throttling device, and this embodiment can determine the first target refrigerant amount of the refrigerant in the liquid storage tank according to the operation parameters of the compressor, so as to adjust the actual weight of the refrigerant in the liquid storage tank to the first target refrigerant weight. Therefore, the refrigerant flowing out of the condenser in the heat exchange loop can enter the liquid storage tank, so that the weight of the refrigerant in the liquid storage tank is the weight of the first target refrigerant, and the amount of the refrigerant participating in the heat exchange cycle is adjusted. The refrigerant quantity in the liquid storage tank is matched with the operation working condition of the heat exchange system, so that the rationality of the refrigerant participating in the heat exchange cycle under different operation working conditions is improved, and the heat exchange performance of the heat exchange system is improved. And the liquid storage tank is used for storing and adjusting the refrigerants, so that the condition of storing various different refrigerants can be increased, the adjusting capacity of the heat exchange system for the refrigerants participating in heat exchange circulation is improved, and the adjusting capacity of the operation working conditions of various heat exchange systems is improved.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:
FIG. 1 is a schematic diagram of a control method for a heat exchange system provided in an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a control method for a heat exchange system provided by an embodiment of the present disclosure in the case where the operating parameters of the compressor include the operating frequency of the compressor;
FIG. 3 is a schematic diagram of a control method for a heat exchange system provided by an embodiment of the present disclosure in the case where the operating parameters of the compressor include the return air temperature of the compressor;
FIG. 4 is a schematic diagram of another control method for a heat exchange system provided by an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of a heat exchange system provided in an embodiment of the present disclosure;
Fig. 6 is a schematic diagram of a control device for a heat exchange system provided in an embodiment of the present disclosure.
Reference numerals:
100. A processor; 101. a memory; 102. a communication interface; 103. a bus; 200. a condenser; 300. a throttle device; 400. an evaporator; 500; a refrigerant adjusting branch; 510. a liquid storage tank; 520. a first electromagnetic valve; 530. a second electromagnetic valve; 600. a compressor; 700. and a third solenoid valve.
Detailed Description
So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.
The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The term "plurality" means two or more, unless otherwise indicated.
In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.
The term "corresponding" may refer to an association or binding relationship, and the correspondence between a and B refers to an association or binding relationship between a and B.
As shown in fig. 5, the embodiment of the disclosure provides a heat exchange system, which includes a heat exchange circuit and a refrigerant adjusting branch 500, the heat exchange circuit includes a compressor 600, a condenser 200, a throttling device 300 and an evaporator 400 sequentially connected through refrigerant pipelines, a first end of a liquid storage tank 510 of the refrigerant adjusting branch 500 is connected with a return air end of the compressor 600, and a second end of the liquid storage tank 510 is connected with the refrigerant pipeline between the condenser 200 and the throttling device 300.
In this embodiment, the heat exchange system includes a heat exchange circuit and a refrigerant adjusting branch 500. The first end of the liquid storage tank 510 of the refrigerant adjusting branch 500 is connected with the air return end of the compressor 600, and the second end of the liquid storage tank 510 is connected with the refrigerant pipeline between the condenser 200 and the throttling device 300, so that the refrigerant in the heat exchange system can flow into the liquid storage tank 510 of the refrigerant adjusting branch 500 through the refrigerant pipeline between the condenser 200 and the throttling device 300, the refrigerant is stored in the liquid storage tank 510, the weight of the refrigerant stored in the liquid storage tank 510 is increased, and the amount of the refrigerant participating in the heat exchange cycle is reduced. Similarly, the first end of the liquid storage tank 510 is connected to the air return end of the compressor 600, and the refrigerant in the liquid storage tank 510 can flow into the compressor 600 under the suction force of the compressor 600, so as to flow back into the heat exchange circuit, so as to reduce the weight of the refrigerant stored in the liquid storage tank 510 and increase the amount of the refrigerant participating in the heat exchange system. According to the embodiment, the refrigerant quantity participating in the refrigerant circulation in the heat exchange system can be regulated, so that the rationality of the refrigerant quantity participating in the heat exchange circulation of the heat exchange system under different working conditions is improved, and the performance of the heat exchange system is improved.
In this embodiment, the second end of the liquid storage tank 510 is connected to the refrigerant pipeline between the condenser 200 and the throttling device 300, and the liquid refrigerant in the refrigerant flowing out from the condenser 200 occupies a relatively large area, so that the stored gaseous refrigerant can be reduced when the liquid storage tank 510 stores the refrigerant. When the refrigerants with the same weight are stored, the storage ratio of the liquid refrigerants is increased, so that the storage space of the liquid storage tank 510 is reduced, the volume of the liquid storage tank 510 is reduced, and the space utilization rate is improved.
In some alternative embodiments, the refrigerant conditioning branch 500 further includes a first solenoid valve 520, a first end of the first solenoid valve 520 being connected to a second end of the liquid storage tank 510, the second end of the first solenoid valve 520 being connected to a refrigerant line between the condenser 200 and the restriction 300. Thus, the first solenoid valve 520 is connected between the second end of the liquid storage tank 510 and a refrigerant line (the refrigerant line is the refrigerant line between the condenser 200 and the throttle device 300), and the refrigerant can flow into the liquid storage tank 510 through the refrigerant line. The present embodiment can adjust the flow rate and the amount of the refrigerant flowing into the liquid storage tank 510 by adjusting the opening of the first solenoid valve 520.
Further, the refrigerant adjusting branch 500 further includes a second electromagnetic valve 530, and two ends of the second electromagnetic valve 530 are respectively connected to the first end of the liquid storage tank 510 and the air return end of the compressor 600. The heat exchange circuit further includes a third solenoid valve 700, and both ends of the third solenoid valve 700 are connected to the return air ends of the evaporator 400 and the compressor 600, respectively.
In this embodiment, two ends of the second electromagnetic valve 530 are respectively connected to the first end of the liquid storage tank 510 and the air return end of the compressor 600, and the refrigerant in the liquid storage tank 510 can flow into the compressor 600 under the suction force of the air return end of the compressor 600. In this embodiment, the opening of the second solenoid valve 530 is adjusted to adjust the flow rate and the amount of the refrigerant flowing into the compressor 600.
Both ends of the third solenoid valve 700 are connected to the return air ends of the evaporator 400 and the compressor 600, respectively, so that the refrigerant in the liquid storage tank 510 can be controlled to flow into the compressor 600 or the refrigerant in the evaporator 400 can be controlled to flow into the compressor 600 by adjusting the opening and closing of the second solenoid valve 530 and the third solenoid valve 700.
For example, when the third solenoid valve 700 is opened and the second solenoid valve 530 is closed, the evaporator 400 communicates with the return air end of the compressor 600, and the refrigerant in the evaporator 400 can flow into the compressor 600. When the third solenoid valve 700 is closed and the second solenoid valve 530 is opened, the accumulator 510 communicates with the compressor 600, and the refrigerant in the accumulator 510 can flow into the compressor 600.
Fig. 1 is a schematic flow chart of a control method for a heat exchange system according to an embodiment of the disclosure. The control method for the heat exchange system may be performed in a controller of the heat exchange system.
And S011, the controller acquires the operation parameters of the compressor.
Optionally, the operating parameter within the compressor includes an operating frequency of the compressor or a return air temperature of the compressor.
The operating frequency of the compressor refers to the number of revolutions per minute the compressor is operated. Higher operating frequencies of the compressor may provide greater refrigeration or compression capacity. Conversely, lower operating frequencies provide lower refrigeration or compression capacity.
The return air temperature of the compressor refers to the temperature of the cool air returned from the evaporator to the compressor, with a lower return air temperature generally indicating that the air is more effectively cooled and the heat exchange system is more effective in cooling.
S012, the controller determines a first target refrigerant weight of the refrigerant in the liquid storage tank according to the operation parameters of the compressor.
In this embodiment, the first target refrigerant weight is: the difference between the total refrigerant weight in the heat exchange system and the refrigerant weight required by the compressor in the process of exerting the good heat exchange performance. Therefore, when the compressor operates with an operation parameter, the weight of the refrigerant stored in the liquid storage tank is the first target weight of the refrigerant corresponding to the operation parameter, so that the weight of the refrigerant participating in the heat exchange cycle is the weight of the refrigerant corresponding to the operation parameter and required by the performance of the heat exchange system, and the heat exchange performance of the heat exchange system is improved.
S013, the controller adjusts the actual weight of the refrigerant in the liquid storage tank to the weight of the first target refrigerant.
According to the embodiment, the first target refrigerant quantity of the refrigerant in the liquid storage tank can be determined according to the operation parameters of the compressor, so that the actual weight of the refrigerant in the liquid storage tank is adjusted to the first target refrigerant weight. Therefore, the refrigerant flowing out of the condenser in the heat exchange loop can enter the liquid storage tank, so that the weight of the refrigerant in the liquid storage tank is the weight of the first target refrigerant, and the amount of the refrigerant participating in the heat exchange cycle is adjusted. The refrigerant quantity in the liquid storage tank is matched with the operation working condition of the heat exchange system, so that the rationality of the refrigerant participating in the heat exchange cycle under different operation working conditions is improved, and the heat exchange performance of the heat exchange system is improved. And the liquid storage tank is used for storing and adjusting the refrigerants, so that the condition of storing various different refrigerants can be increased, the adjusting capacity of the heat exchange system for the refrigerants participating in heat exchange circulation is improved, and the adjusting capacity of the operation working conditions of various heat exchange systems is improved.
For example, in the case where the heat exchange system includes a first solenoid valve, the controller adjusts an actual weight of the refrigerant in the liquid storage tank to a first target refrigerant weight, including: the controller opens the first solenoid valve. And under the condition that the actual weight of the refrigerant in the liquid storage tank reaches the first target weight of the refrigerant, the controller closes the first electromagnetic valve.
As shown in fig. 2, where the operating parameters of the compressor include the operating frequency of the compressor, embodiments of the present disclosure provide a flow schematic of a control method for a heat exchange system. The control method for the heat exchange system may be performed in a controller of the heat exchange system.
S021, the controller obtains the operation parameters of the compressor. At this time, the operation parameter of the compressor is the operation frequency of the compressor.
S022, the controller determines a frequency difference between an operation frequency of the compressor and a preset frequency.
Optionally, the preset frequency of the compressor is a maximum frequency or a minimum frequency at which the compressor can operate. Wherein the frequency difference determined by the controller is a negative number in the case where the operating frequency is the maximum frequency; in the case where the operating frequency is the minimum frequency, the frequency difference determined by the controller is a positive number.
S023, the controller obtains the weight of the refrigerant in the liquid storage tank corresponding to the frequency difference value.
S024, the controller takes the refrigerant weight of the refrigerant in the liquid storage tank corresponding to the frequency difference as the first target refrigerant weight.
Further, the weight of the refrigerant in the liquid storage tank corresponding to the frequency difference is calculated according to the following formula:
Wherein G is the weight of the refrigerant in the liquid storage tank corresponding to the frequency difference, G 0 is the initial weight of the refrigerant, deltaf is the frequency difference, deltaf 0 is the preset frequency difference, and G is the weight of the refrigerant corresponding to the preset frequency difference.
In this embodiment, taking the preset frequency as the maximum frequency as an example, the smaller the operating frequency is, the smaller the frequency difference is, the larger the weight of the refrigerant added by the initial refrigerant is, the larger the weight of the refrigerant in the liquid storage tank corresponding to the frequency difference is, that is, the larger the weight of the first target refrigerant is, and the more the refrigerant is stored in the liquid storage tank, so that the refrigerant participating in the heat exchange cycle can be reduced and the energy efficiency of the heat exchange system can be improved under the condition that the operating frequency of the compressor is smaller.
Under the condition that the operation frequency is larger, the frequency difference value is larger, the weight of the refrigerant added by the initial refrigerant weight is smaller, the weight of the refrigerant in the liquid storage tank corresponding to the frequency difference value is smaller, namely, the weight of the first target refrigerant is smaller, the refrigerant stored in the liquid storage tank is smaller, and therefore the refrigerant participating in the heat exchange cycle can be increased under the condition that the operation frequency of the compressor is larger, and the energy efficiency of a heat exchange system is improved.
Taking the preset frequency as the minimum frequency as an example, under the condition of smaller operation frequency, the smaller the frequency difference value is, the smaller the refrigerant weight subtracted by the initial refrigerant weight is, the larger the refrigerant weight of the refrigerant in the liquid storage tank corresponding to the frequency difference value is, namely the larger the first target refrigerant weight is, the more the refrigerant is stored in the liquid storage tank, so that the refrigerant participating in the heat exchange cycle can be reduced under the condition of smaller operation frequency of the compressor, and the energy efficiency of the heat exchange system is improved.
Under the condition that the operation frequency is larger, the frequency difference value is larger, the weight of the refrigerant subtracted from the initial refrigerant weight is larger, the weight of the refrigerant in the liquid storage tank corresponding to the frequency difference value is smaller, namely the weight of the first target refrigerant is smaller, the refrigerant stored in the liquid storage tank is smaller, and therefore the refrigerant participating in the heat exchange cycle can be increased under the condition that the operation frequency of the compressor is larger, and the energy efficiency of a heat exchange system is improved.
Optionally, the initial refrigerant weights corresponding to the operation frequency being the maximum operation frequency and the operation frequency being the minimum operation frequency are different, and the initial refrigerant weight corresponding to the operation frequency being the maximum operation frequency is larger than the initial refrigerant weight corresponding to the operation frequency being the minimum operation frequency.
S025, the controller adjusts the actual weight of the refrigerant in the liquid storage tank to the weight of the first target refrigerant.
As shown in fig. 3, where the operating parameters of the compressor include the return air temperature of the compressor, embodiments of the present disclosure provide a flow schematic of a control method for a heat exchange system. The control method for the heat exchange system may be performed in a controller of the heat exchange system.
S031, the controller obtains the operation parameters of the compressor. At this time, the operation parameter of the compressor is the operation frequency of the compressor.
S032, the controller determines a temperature difference between the return air temperature of the compressor and a preset return air temperature.
S033, the controller obtains the weight of the refrigerant in the liquid storage tank corresponding to the temperature difference.
Optionally, the controller obtains a weight of the refrigerant in the liquid storage tank corresponding to the temperature difference, including:
and under the condition that the temperature difference is larger than a first preset temperature difference, the controller determines that the weight of the first refrigerant is the weight of the refrigerant in the liquid storage tank corresponding to the temperature difference.
And under the condition that the temperature difference is smaller than or equal to the first preset temperature difference and is larger than the second preset temperature difference, the controller determines that the weight of the second refrigerant is the weight of the refrigerant in the liquid storage tank corresponding to the temperature difference.
And under the condition that the temperature difference is smaller than or equal to the preset temperature difference, the controller determines that the weight of the third refrigerant is the weight of the refrigerant in the liquid storage tank corresponding to the temperature difference.
Wherein, the first refrigerant weight is greater than the second refrigerant weight, and the second refrigerant weight is greater than the third refrigerant weight.
Optionally, the preset return air temperature is the return air temperature of the corresponding compressor when the refrigerating capacity of the heat exchange system is maximum.
In this embodiment, when the temperature difference is greater than the first preset temperature difference, that is, the return air temperature increases, the refrigerant is insufficiently cooled in the evaporator, and the heating effect of the heat exchange system decreases. At this time, the weight of the first refrigerant is determined to be the weight of the refrigerant in the liquid storage tank corresponding to the temperature difference, namely, the weight of the refrigerant stored in the liquid storage tank is increased, the amount of the refrigerant participating in the heat exchange cycle is reduced, and the refrigerant can be fully cooled in the evaporator, so that the return air temperature is reduced, and the heat exchange effect of the heat exchange system is improved.
In case the temperature difference is smaller than the second preset temperature difference, i.e. the return air temperature is reduced, the refrigerant insufficiently cooled in the evaporator is reduced. At this time, the weight of the third refrigerant is determined to be the weight of the refrigerant in the liquid storage tank corresponding to the temperature difference, namely, compared with the other two cases, the weight of the refrigerant stored in the liquid storage tank is reduced, the amount of the refrigerant participating in the heat exchange cycle is increased, and the heat exchange effect of the heat exchange system is improved.
In this embodiment, the refrigerant in the liquid storage tank can be adjusted in a grading manner through a plurality of temperature difference intervals, so that when the change of the amount of the refrigerant participating in the heat exchange cycle is large, the load of components (such as a compressor, a throttling device and the like) in the heat exchange system is increased, and the operation stability and the service life of the heat exchange system are improved.
S034, the controller takes the weight of the refrigerant in the liquid storage tank corresponding to the temperature difference as the weight of the first target refrigerant.
S035, the controller adjusts the actual weight of the refrigerant in the liquid storage tank to the first target weight of the refrigerant.
In this embodiment, the operation state of the heat exchange system can be obtained by the temperature difference between the return air temperature and the preset return air temperature, so as to obtain the weight of the refrigerant in the liquid storage tank corresponding to the temperature difference, and adjust the actual weight of the refrigerant in the liquid storage tank to be the first target weight of the refrigerant, thereby adjusting the weight of the refrigerant participating in the heat exchange cycle and improving the energy efficiency of the heat exchange system.
In some alternative embodiments, the controller calculates the actual weight of the refrigerant in the fluid reservoir as follows:
S041, the controller determines the weight of the liquid refrigerant and the weight of the gaseous refrigerant in the liquid storage tank.
Under normal conditions, the refrigerant in the liquid storage tank is in a gas-liquid coexisting state, and the weight of the liquid refrigerant and the weight of the gaseous refrigerant are respectively determined in the embodiment, so that the accuracy of the obtained actual weight of the refrigerant in the liquid storage tank is improved.
S042, the controller determines the actual weight of the refrigerant in the liquid storage tank according to the weight of the liquid refrigerant and the weight of the gaseous refrigerant.
Specifically, the actual weight of the refrigerant in the liquid storage tank can be obtained by adding the weight of the liquid refrigerant and the weight of the gaseous refrigerant
Further, the controller determines the weight of the liquid refrigerant in the liquid storage tank, including calculating the weight of the liquid refrigerant according to the following formula:
G1＝S*ρ1*H1
Wherein G 1 is the weight of the liquid refrigerant in the liquid storage tank, S is the cross-sectional area of the cavity of the liquid storage tank, ρ 1 is the density of the liquid refrigerant, and H 1 is the height of the liquid refrigerant in the liquid storage tank.
Optionally, a liquid level sensor is arranged in the liquid storage tank to obtain the height of the liquid refrigerant in the liquid storage tank.
Optionally, the controller determines the weight of the gaseous refrigerant in the liquid storage tank, including calculating the weight of the gaseous refrigerant according to the following formula:
Wherein G 2 is the weight of the gaseous refrigerant in the liquid storage tank, S is the cross-sectional area of the liquid storage tank cavity, P is the pressure value at the top of the liquid storage tank, T is the temperature of the gaseous refrigerant in the liquid storage tank, R is the gas constant, H 1 is the height of the liquid refrigerant in the liquid storage tank, and H is the total height of the liquid storage tank cavity.
Optionally, a temperature sensor and a pressure sensor are further arranged in the liquid storage tank so as to obtain the temperature of the gaseous refrigerant in the liquid storage tank and the pressure value of the gaseous refrigerant. The pressure sensor is arranged at the upper end part of the liquid storage tank.
In this embodiment, the densities of the gaseous refrigerants are different at different temperatures and pressures, for example, the density value of the R290 refrigerant at 30 ℃ and 1Mpa is 500kg/m3; the density at 25℃and 1MPa was 492kg/m3. Different refrigerants and corresponding physical parameter tables such as temperature, pressure, density and the like can be implanted into the controller through a program, and the density of the gaseous refrigerant is determined through the detected temperature of the gaseous refrigerant and the pressure value at the top of the liquid storage tank. The pressure value at the top of the liquid storage tank is the pressure value of the gaseous refrigerant. Thus, the accuracy of obtaining the weight of the gaseous refrigerant in the liquid storage tank is improved.
Fig. 4 is a flow chart of another control method for a heat exchange system according to an embodiment of the present disclosure. The control method for the heat exchange system may be performed in a controller of the heat exchange system.
And S051, the controller determines the second target refrigerant weight of the refrigerant in the liquid storage tank when the heat exchange system is in the current operation mode.
Optionally, the current operating mode includes one or more of a normal on operating mode, a normal off operating mode, a power off operating mode, and a power off sleep operating mode.
Under the condition that the current operation mode comprises a normal opening operation mode, the controller determines a second target refrigerant weight of the refrigerant in the liquid storage tank according to the operation parameters of the compressor.
And under the condition that the current operation mode comprises a normal shutdown operation mode, the controller determines that the fourth refrigerant weight is the second target refrigerant weight.
Under the condition that the current operation mode comprises a power-off operation mode, the controller determines a second target refrigerant weight of the refrigerant in the liquid storage tank according to the operation parameters of the compressor.
And under the condition that the current operation mode comprises a power-off dormant operation mode, the controller determines that the weight of the fifth refrigerant is the weight of the second target refrigerant.
Wherein the weight of the fourth refrigerant is less than or equal to the weight of the fifth refrigerant. Optionally, the third refrigerant weight is greater than the fourth refrigerant weight, and the third refrigerant weight is greater than the fifth refrigerant weight.
Optionally, the fourth refrigerant weight is less than or equal to 5g, and/or the fifth refrigerant weight is less than or equal to 5g. The operation mode of the heat exchange system is a closed or dormant operation mode, and the refrigerant in the liquid storage tank is emptied, so that the refrigerant in the heat exchange system can participate in heat exchange circulation when the heat exchange system operates again, and then the amount of the refrigerant participating in the heat exchange circulation is reduced according to the operation parameters of the compressor. Therefore, when the engine is started up each time, only the amount of the refrigerant participating in the heat exchange cycle is reduced, and the accuracy of the refrigerant participating in the heat exchange cycle is improved. And the refrigerant stored in the liquid storage tank can be stored at the side of the compressor when the heat exchange system is shut down or dormant, so that the refrigerant at the side of the compressor is increased when the heat exchange system just starts to operate, and the quantity of the refrigerant participating in the heat exchange cycle is more. Therefore, more refrigerant is stored in the liquid storage tank when the heat exchange system just starts to operate, the quantity of the refrigerant participating in the heat exchange system is less, and the shutdown of the heat exchange system is caused. For example, when the heat exchange system starts to operate under the ultralow temperature working condition, the quantity of the refrigerant in the liquid storage tank is large, and the condition that the compressor cannot operate due to the fact that the refrigerant in the compressor is small is reduced. In the embodiment, when the heat exchange system is stopped or dormant, the refrigerant in the liquid storage tank is recovered to the side of the compressor, so that the running stability of the compressor when the compressor is started can be improved, and the running stability and reliability of the heat exchange system are improved.
Because the liquid storage tank is communicated with the heat exchange loop, the refrigerant in the liquid storage tank cannot be completely emptied, and therefore, when the heat exchange system stops running, a small amount of refrigerant is stored in the liquid storage tank. In this embodiment, the fourth refrigerant weight and the fifth refrigerant weight may be determined according to the actual emptying capacity of the liquid storage tank in the heat exchange system, or may be determined by a person skilled in the art according to experience or limited experiments, as long as the refrigerant stored in the liquid storage tank does not affect the operation of the compressor when the compressor is started, and the present invention is not limited herein.
Optionally, the controller determines that the operation mode of the heat exchange system is a power-off sleep operation mode when the heat exchange system is powered off and powered on after power-off in the operation process and a remote control instruction is not received within a preset time.
And under the condition that the heat exchange system is powered on after being powered off in the operation process and a remote control instruction is received within a preset time, the controller determines that the operation mode of the heat exchange system is a power-off working operation mode.
Alternatively, the preset time may range from 1 minute to 5 minutes, for example, the preset time may be 1 minute, 2 minutes, 3 minutes, 4 minutes, or 5 minutes.
S052, the controller obtains the real-time weight value of the refrigerant in the liquid storage tank.
S053, the controller adjusts the actual weight of the refrigerant in the liquid storage tank to the weight of the second target refrigerant according to the real-time weight value.
Optionally, the controller determines a magnitude relationship between the real-time weight value and the preset weight value when the heat exchange system is in the normal shutdown operation mode.
And under the condition that the real-time weight value is larger than the preset weight value, the controller reduces the actual weight of the refrigerant in the liquid storage tank to the second target weight of the refrigerant. Therefore, when the heat exchange system is shut down, the refrigerant quantity in the liquid storage tank can be reduced, and the reliability and the operation stability of the compressor are improved when the compressor operates again.
The preset weight value is a weight value corresponding to the weight of the second target refrigerant.
Optionally, the controller determines a magnitude relationship between the real-time weight value and a preset weight value when the heat exchange system is in a power-off sleep mode of operation.
And under the condition that the real-time weight value is larger than the preset weight value, the controller reduces the actual weight of the refrigerant in the liquid storage tank to the second target weight of the refrigerant. Therefore, when the heat exchange system is dormant, the refrigerant quantity in the liquid storage tank can be reduced, and the reliability and the operation stability of the compressor are improved when the compressor operates again.
Optionally, the controller determines a magnitude relationship between the real-time weight value and the preset weight value when the heat exchange system is in the power-off operation mode.
And under the condition that the real-time weight value is larger than the preset weight value, the controller reduces the actual weight of the refrigerant in the liquid storage tank to the second target weight of the refrigerant.
And under the condition that the real-time weight value is smaller than the preset weight value, the controller increases the actual weight of the refrigerant in the liquid storage tank to the second target weight of the refrigerant.
In this embodiment, after the heat exchange system is powered off and powered on, the indoor temperature changes, and the operation parameters of the compressor change according to the indoor temperature. At this time, the weight (i.e. the preset weight value) of the second target refrigerant is determined again through the operation parameters of the compressor, so that the refrigerant stored in the liquid storage tank is matched with the operation parameters of the compressor, the reasonability of the refrigerant quantity participating in the heat exchange cycle is improved, and the operation effect of the heat exchange system is improved.
Illustratively, the controller reduces the actual weight of the refrigerant in the liquid storage tank to a second target refrigerant weight, comprising: the controller controls the first solenoid valve to close, the second solenoid valve to open, and the third solenoid valve to close. Therefore, the refrigerant in the liquid storage tank can flow into the compressor through one end of the liquid storage tank and the second electromagnetic valve under the suction action of the compressor, so that the actual weight of the refrigerant in the liquid storage tank is reduced.
The controller increases the actual weight of the refrigerant in the liquid storage tank to the second target weight of the refrigerant, and the controller comprises: the controller controls the first solenoid valve to open, the second solenoid valve to close, and the third solenoid valve to open. Therefore, the refrigerant between the condenser and the throttling device can flow into the liquid storage tank through the first electromagnetic valve, and the actual weight of the refrigerant in the liquid storage tank is increased. And the second electromagnetic valve is closed, so that the condition that the refrigerant in the liquid storage tank is sucked by the compressor is reduced, and the efficiency of increasing the refrigerant in the liquid storage tank is improved. And opening the third electromagnetic valve to enable the heat exchange system to normally operate.
In some alternative embodiments, the control method further comprises: the controller adjusts an operation mode of the compressor according to the actual pressure value and the real-time weight value.
Optionally, the controller determines a magnitude relationship between the real-time weight value and the preset weight value when the heat exchange system is in the normal shutdown operation mode.
And under the condition that the real-time weight value is larger than the preset weight value, the controller controls the compressor to start to work.
And under the condition that the real-time weight value is smaller than or equal to the preset weight value, the controller controls the compressor to be closed.
Further, under the condition that the real-time weight value is larger than the preset weight value, the controller also controls the first electromagnetic valve to be closed, the second electromagnetic valve to be opened and the third electromagnetic valve to be closed.
Therefore, the refrigerant in the liquid storage tank can flow into the compressor through one end of the liquid storage tank and the second electromagnetic valve under the suction action of the compressor, so that the refrigerant in the liquid storage tank is reduced.
And under the condition that the real-time weight value is smaller than or equal to the preset weight value, the controller also controls the first electromagnetic valve to be closed, the second electromagnetic valve to be closed and the third electromagnetic valve to be opened. Therefore, the evaporator can be communicated with the air return end of the compressor, so that when the compressor runs again, the refrigerant in the evaporator can be directly sucked, and the working stability and reliability of the compressor are improved.
Optionally, the controller determines a magnitude relationship between the real-time weight value and a preset weight value when the heat exchange system is in a power-off sleep mode of operation.
And under the condition that the real-time weight value is larger than the preset weight value, the controller controls the compressor to start to work.
And under the condition that the real-time weight value is smaller than or equal to the preset weight value, the controller controls the compressor to be closed.
Optionally, the controller controls the compressor to start working when the heat exchange system is in the power-off working operation mode.
As shown in connection with fig. 6, an embodiment of the present disclosure provides a control apparatus for a heat exchange system, including a processor (processor) 100 and a memory (memory) 101. Optionally, the apparatus may further comprise a communication interface (Communication Interface) 102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 may communicate with each other via the bus 103. The communication interface 102 may be used for information transfer. The processor 100 may call logic instructions in the memory 101 to perform the control method for the heat exchange system of the above-described embodiments.
Further, the logic instructions in the memory 101 described above may be implemented in the form of software functional units and may be stored in a computer readable storage medium when sold or used as a stand alone product.
The memory 101 is a computer readable storage medium that can be used to store a software program, a computer executable program, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 100 executes the functional applications and data processing by running the program instructions/modules stored in the memory 101, i.e. implements the control method for the heat exchange system in the above-described embodiments.
The memory 101 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, at least one application program required for a function; the storage data area may store data created according to the use of the terminal device, etc. Further, the memory 101 may include a high-speed random access memory, and may also include a nonvolatile memory.
The embodiment of the disclosure provides a heat exchange system, which further comprises the control device for the heat exchange system. A controlling means for heat transfer system installs in the heat transfer circuit. The mounting relationships described herein are not limited to placement within the heat exchange circuit, but include mounting connections to other components of the heat exchange system, including but not limited to physical, electrical, or signal transmission connections, etc. Those skilled in the art will appreciate that the control means for the heat exchange system may be adapted to the available heat exchange circuits, thereby enabling other possible embodiments.
Embodiments of the present disclosure provide a computer-readable storage medium storing computer-executable instructions configured to perform the above-described control method for a heat exchange system.
Embodiments of the present disclosure may be embodied in a software product stored on a storage medium, including one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of a method according to embodiments of the present disclosure. While the aforementioned storage medium may be a non-transitory storage medium, such as: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may involve structural, logical, electrical, process, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. Moreover, the terminology used in the present application is for the purpose of describing embodiments only and is not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a," "an," and "the" (the) are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this disclosure is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, when used in the present disclosure, the terms "comprises," "comprising," and/or variations thereof, mean that the recited features, integers, steps, operations, elements, and/or components are present, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising one …" does not exclude the presence of other like elements in a process, method or apparatus that includes the element. In this context, each embodiment may be described with emphasis on the differences from the other embodiments, and the same similar parts between the various embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method sections disclosed in the embodiments, the description of the method sections may be referred to for relevance.
Those of skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. The skilled artisan may use different methods for each particular application to achieve the described functionality, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. It will be clearly understood by those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the embodiments disclosed herein, the disclosed methods, articles of manufacture (including but not limited to devices, apparatuses, etc.) may be practiced in other ways. For example, the apparatus embodiments described above are merely illustrative, and for example, the division of the units may be merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form. The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to implement the present embodiment. In addition, each functional unit in the embodiments of the present disclosure may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than that disclosed in the description, and sometimes no specific order exists between different operations or steps. For example, two consecutive operations or steps may actually be performed substantially in parallel, they may sometimes be performed in reverse order, which may be dependent on the functions involved. Each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (10)
1. The control method for the heat exchange system is characterized in that the heat exchange system comprises a heat exchange loop and a refrigerant adjusting branch, the heat exchange loop comprises a compressor, a condenser, a throttling device and an evaporator which are sequentially connected through refrigerant pipelines, a first end of a liquid storage tank of the refrigerant adjusting branch is connected with a return air end of the compressor, and a second end of the liquid storage tank is connected with the refrigerant pipeline between the condenser and the throttling device; the control method comprises the following steps:
Acquiring operation parameters of a compressor;
Determining a first target refrigerant weight of the refrigerant in the liquid storage tank according to the operation parameters of the compressor;
and adjusting the actual weight of the refrigerant in the liquid storage tank to the weight of the first target refrigerant.
2. The control method of claim 1, wherein the operating parameters of the compressor include an operating frequency of the compressor or a return air temperature of the compressor;
determining a first target refrigerant weight of the refrigerant in the liquid storage tank according to the operation parameters of the compressor, including:
determining a frequency difference between an operating frequency of the compressor and a preset frequency;
Obtaining the weight of the refrigerant in the liquid storage tank corresponding to the frequency difference value;
Taking the weight of the refrigerant in the liquid storage tank corresponding to the frequency difference as the weight of a first target refrigerant;
Or alternatively
Determining a temperature difference between the return air temperature of the compressor and a preset return air temperature;
obtaining the weight of the refrigerant in the liquid storage tank corresponding to the temperature difference;
And taking the weight of the refrigerant in the liquid storage tank corresponding to the temperature difference as the weight of the first target refrigerant.
3. The control method according to claim 2, wherein obtaining the refrigerant weight of the refrigerant in the liquid storage tank corresponding to the frequency difference value includes calculating the refrigerant weight of the refrigerant in the liquid storage tank corresponding to the frequency difference value according to the following formula:
Wherein G is the weight of the refrigerant in the liquid storage tank corresponding to the frequency difference, G 0 is the initial weight of the refrigerant, deltaf is the frequency difference, deltaf 0 is the preset frequency difference, and G is the weight of the refrigerant corresponding to the preset frequency difference.
4. The control method according to claim 1, wherein the actual weight of the refrigerant in the liquid storage tank is calculated as follows:
Determining the weight of liquid refrigerant and the weight of gaseous refrigerant in the liquid storage tank;
and determining the actual weight of the refrigerant in the liquid storage tank according to the weight of the liquid refrigerant and the weight of the gaseous refrigerant.
5. The control method of claim 4, wherein determining the weight of the liquid refrigerant in the liquid storage tank comprises calculating the weight of the liquid refrigerant according to the formula:
G1＝S*ρl*H1
Wherein G 1 is the weight of the liquid refrigerant in the liquid storage tank, S is the cross-sectional area of the cavity of the liquid storage tank, ρ 1 is the density of the liquid refrigerant, and H 1 is the height of the liquid refrigerant in the liquid storage tank;
and/or the number of the groups of groups,
Determining the weight of the gaseous refrigerant in the liquid storage tank, wherein the weight of the gaseous refrigerant is calculated according to the following formula:
Wherein G 2 is the weight of the gaseous refrigerant in the liquid storage tank, S is the cross-sectional area of the liquid storage tank cavity, P is the pressure value at the top of the liquid storage tank, T is the temperature of the gaseous refrigerant in the liquid storage tank, R is the gas constant, H 1 is the height of the liquid refrigerant in the liquid storage tank, and H is the total height of the liquid storage tank cavity.
6. The control method according to any one of claims 1 to 5, characterized by further comprising:
determining the weight of a second target refrigerant of the refrigerant in the liquid storage tank when the heat exchange system is in the current operation mode;
obtaining a real-time weight value of a refrigerant in the liquid storage tank;
And adjusting the actual weight of the refrigerant in the liquid storage tank to the weight of the second target refrigerant according to the real-time weight value.
7. The control method according to claim 6, wherein adjusting the actual weight of the refrigerant in the liquid storage tank to the second target refrigerant weight based on the real-time weight value, comprises:
Reducing the actual weight of the refrigerant in the liquid storage tank to the weight of the second target refrigerant under the condition that the real-time weight value is larger than the preset weight value; and/or the number of the groups of groups,
And under the condition that the real-time weight value is smaller than the preset weight value, increasing the actual weight of the refrigerant in the liquid storage tank to the weight of the second target refrigerant.
8. The control method according to claim 6, characterized by further comprising:
And adjusting the operation mode of the compressor according to the real-time weight value.
9. A control device for a heat exchange system comprising a processor and a memory storing program instructions, wherein the processor is configured to perform the control method for a heat exchange system according to any one of claims 1 to 8 when the program instructions are run.
10. A heat exchange system, comprising:
The heat exchange loop comprises a compressor, a condenser, a throttling device and an evaporator which are sequentially connected through refrigerant pipelines;
the first end of the liquid storage tank of the refrigerant adjusting branch is connected with the air return end of the compressor, and the second end of the liquid storage tank is connected with a refrigerant pipeline between the condenser and the throttling device;
The control device for a heat exchange system of claim 9, connected to a heat exchange circuit.
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