CN112665253A - Multi-chamber energy-saving control method and device for refrigeration system and refrigeration system - Google Patents
Multi-chamber energy-saving control method and device for refrigeration system and refrigeration system Download PDFInfo
- Publication number
- CN112665253A CN112665253A CN202011597102.8A CN202011597102A CN112665253A CN 112665253 A CN112665253 A CN 112665253A CN 202011597102 A CN202011597102 A CN 202011597102A CN 112665253 A CN112665253 A CN 112665253A
- Authority
- CN
- China
- Prior art keywords
- preset
- compartment
- opening degree
- heating output
- expansion valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The embodiment of the invention discloses a multi-chamber energy-saving control method and device for a refrigerating system and the refrigerating system, wherein the method comprises the following steps: acquiring the on-off state of each electromagnetic valve in the refrigeration system, the rotating speed of the variable frequency compressor, the actual temperature of each compartment and the heating output quantity of a heater of each compartment; determining the temperature difference between the actual temperature of each chamber and the corresponding preset target temperature, and determining the magnitude relation of the heating output quantity of the heater of each chamber; when the electromagnetic valves corresponding to the chambers are switched on, the rotating speed of the variable frequency compressor is smaller than a preset rotating speed threshold value, the temperature difference is within a preset temperature difference range, and the heating output quantity is larger than a preset heating output quantity threshold value, the current opening degree of the electronic expansion valve corresponding to the chambers is controlled to be reduced by a preset opening degree every preset time according to the size relation of the heating output quantity, and the opening degree of the electronic expansion valve is controlled to be larger than a preset minimum opening degree. The technical scheme provided by the embodiment of the invention can realize energy-saving control of the chamber and reduce energy consumption of the chamber.
Description
Technical Field
The embodiment of the invention relates to a refrigeration technology, in particular to a multi-chamber energy-saving control method and device for a refrigeration system and the refrigeration system.
Background
The refrigeration system, as a system for transferring heat from a substance (or environment) having a relatively high temperature to a substance (or environment) having a relatively low temperature using external energy, exchanges heat through a change in state, and can satisfy various refrigeration demands according to actual demands. In a refrigeration system, such as a multi-compartment refrigeration system, when multiple compartments operate simultaneously, if the flow rate entering each compartment is not reasonably controlled, the situation of excessive flow rate may occur on the basis of meeting the compartment requirements, thereby causing resource waste, and possibly causing problems of uneven flow rate distribution, large energy consumption, temperature fluctuation and the like of the operating compartments. Therefore, it is necessary to perform reliable energy-saving control on each compartment to ensure the energy-saving effect of each compartment.
At present, in the existing multi-compartment energy-saving control method for a refrigeration system, the purpose of saving energy is achieved by closing a sub-refrigeration system reaching a refrigeration temperature, or the refrigerant is transferred and stored, so that the refrigerant of an evaporator is reasonably distributed, and the problems of refrigerant migration and overheating of the refrigerant of the evaporator are solved, so that an energy-saving effect is achieved.
Disclosure of Invention
The embodiment of the invention provides a multi-chamber energy-saving control method and device for a refrigerating system and the refrigerating system, which are used for realizing the energy-saving control of chambers and reducing the energy consumption of the chambers.
In a first aspect, an embodiment of the present invention provides a multi-compartment energy saving control method for a refrigeration system, including:
acquiring the on-off state of each electromagnetic valve in the refrigeration system, the rotating speed of the variable frequency compressor, the actual temperature of each compartment and the heating output quantity of a heater of each compartment; the variable frequency compressor is communicated with the corresponding chambers through passages where the electromagnetic valves are located;
determining the temperature difference between the actual temperature of each compartment and the corresponding preset target temperature according to the actual temperature of each compartment, and determining the magnitude relation of the heating output of the heater of each compartment according to the heating output of the heater of each compartment;
when the electromagnetic valves corresponding to the chambers are switched on, the rotating speed of the variable frequency compressor is smaller than a preset rotating speed threshold value, the temperature difference is within a preset temperature difference range, and the heating output quantity is larger than a preset heating output quantity threshold value, the current opening degree of the electronic expansion valve corresponding to the chambers is controlled to be reduced by a preset opening degree every preset time according to the size relation of the heating output quantity, and the opening degree of the electronic expansion valve is controlled to be larger than a preset minimum opening degree.
Optionally, the solenoid valve includes a first solenoid valve and a second solenoid valve, the electronic expansion valve includes a first electronic expansion valve and a second electronic expansion valve, and the chamber includes a first chamber and a second chamber;
when the solenoid valve that each compartment corresponds switches on, the rotational speed of inverter compressor is less than preset rotational speed threshold value, and when the temperature difference was in preset temperature difference scope and heating output volume was greater than preset heating output volume threshold value, according to the big or small relation of heating output volume, the current aperture of the electronic expansion valve that control compartment corresponds reduced preset aperture every preset time, includes:
when r1 is 1 and r2 is 1, Δ T11 ≦ Δ T1 ≦ Δ T12 and Δ T21 ≦ Δ T2 ≦ Δ T22, | T1HMV-T2HMV | > THMV, C _ rpm ≦ Min (comp) + C _ b, T1_ PV ≧ T1_ PV _ dt and T2_ PV ≧ T2_ PV _ dt and | T1_ PV-T2_ PV | >. Δ T _ PV _ dt, T1HMV ≧ K1 ≧ Δ T1HMV _ L or T1HMV ≧ K2 ≧ T1HMV _ H or T2HMV ≧ K3 ≧ T2HMV _ L or T2HMV Δ K4 Δ T2_ H, EV1 ≧ HMV _ H or Δ T24, the first opening of the heating chamber is controlled according to the first or second opening of the first expansion valve (EXV) and second (EXV) and the second (EXV) heating output of the first expansion valve, the second opening, the first expansion valve, the second (EXV) is controlled according to the second opening size, the first opening, the second opening of the first expansion valve; wherein r1 ═ 1 denotes that the first solenoid valve is in an on state, r2 ═ 1 denotes that the second solenoid valve is in an on state, Δ T1 denotes a temperature difference of the first compartment, Δ T11 and Δ T12 are respectively a minimum value and a maximum value of a preset temperature difference range of Δ T1, Δ T2 denotes a temperature difference of the second compartment, Δ T21 and Δ T22 are respectively a minimum value and a maximum value of a preset temperature difference range of Δ T2, T1HMV, T2HMV and THMV are respectively a heating output of the first compartment, a heating output of the second compartment and a preset heating output threshold value, C _ rpm, Min (Comp) and C _ b are respectively an actual rotation speed of the inverter compressor, a preset rotation speed threshold value and a preset rotation speed deviation value, T1_ PV and T1_ PV _ dt denote respectively an actual temperature and a preset temperature value of the first compartment, T2_ T38 _ PV _ dt denotes respectively a temperature of the second compartment, a temperature coefficient of the second compartment, a preset temperature coefficient of 39k 59648 and a preset temperature coefficient of the second compartment, a preset temperature coefficient of the first compartment, a preset temperature coefficient of the inverter 39k 59648, Δ T1HMV _ L and Δ T1HMV _ H respectively represent a preset heating output minimum value and a preset heating output maximum value of the first compartment, Δ T2HMV _ L and Δ T2HMV _ H respectively represent a preset heating output minimum value and a preset heating output maximum value of the second compartment, EV1 and Min (EXV1) respectively represent a current opening degree and a preset minimum opening degree of the first electronic expansion valve, and EV2 and Min (EXV2) respectively represent a current opening degree and a preset minimum opening degree of the second electronic expansion valve.
Optionally, the controlling the opening degree of the first electronic expansion valve or the opening degree of the second electronic expansion valve according to the magnitude relationship between the heating output quantity of the first chamber and the heating output quantity of the second chamber includes:
and if the T1HMV is larger than the T2HMV, controlling the current opening degree of the first electronic expansion valve to be reduced by a preset opening degree every preset time, and controlling the opening degree of the first electronic expansion valve to be larger than a preset minimum opening degree.
Optionally, the controlling the opening degree of the first electronic expansion valve or the opening degree of the second electronic expansion valve according to the magnitude relationship between the heating output quantity of the first chamber and the heating output quantity of the second chamber includes:
and if the T2HMV is larger than the T1HMV, controlling the current opening degree of the second electronic expansion valve to reduce the preset opening degree every preset time, and controlling the opening degree of the second electronic expansion valve to be larger than the preset minimum opening degree.
Optionally, after controlling the opening degree of the first electronic expansion valve or the opening degree of the second electronic expansion valve according to the magnitude relationship between the heating output quantity of the first chamber and the heating output quantity of the second chamber, the method includes:
and controlling the first electromagnetic valve to keep the current conduction state, and simultaneously controlling the second electromagnetic valve to keep the current conduction state.
Optionally, the first solenoid valve and the first electronic expansion valve are in the same passage, and the second solenoid valve and the second electronic expansion valve are in the same passage; the variable frequency compressor is communicated with the first chamber through a passage where the first electromagnetic valve is located, and is communicated with the second chamber through a passage where the second electromagnetic valve is located.
Optionally, each compartment is provided with a corresponding temperature sensor, and the actual temperature of the compartment is obtained by the corresponding temperature sensor.
In a second aspect, an embodiment of the present invention further provides a multi-compartment energy saving control device for a refrigeration system, including:
the information acquisition module is used for acquiring the switching state of each electromagnetic valve in the refrigeration system, the rotating speed of the variable frequency compressor, the actual temperature of each compartment and the heating output quantity of the heater of each compartment; the variable frequency compressor is communicated with the corresponding chambers through passages where the electromagnetic valves are located;
the temperature difference determining module is used for determining the temperature difference between the actual temperature of each compartment and the corresponding preset target temperature according to the actual temperature of each compartment, and determining the magnitude relation of the heating output quantity of the heater of each compartment according to the heating output quantity of the heater of each compartment;
and the energy-saving control module is used for controlling the current opening degree of the electronic expansion valve corresponding to the chambers to be reduced by a preset opening degree at preset time intervals according to the magnitude relation of the heating output quantity and controlling the opening degree of the electronic expansion valve to be larger than a preset minimum opening degree when the electromagnetic valves corresponding to the chambers are switched on, the rotating speed of the variable frequency compressor is smaller than a preset rotating speed threshold value, the temperature difference is within a preset temperature difference range, and the heating output quantity is larger than a preset heating output quantity threshold value.
In a third aspect, an embodiment of the present invention further provides a refrigeration system, including: the refrigeration system comprises a variable frequency compressor, a controller, at least two chambers, at least two electromagnetic valves in one-to-one correspondence with the at least two chambers, and at least two electronic expansion valves in one-to-one correspondence with the at least two chambers, wherein the refrigeration system multi-chamber energy-saving control device is integrated in the controller; the variable frequency compressor, the electromagnetic valve and the electronic expansion valve are all electrically connected with the controller, and the variable frequency compressor is connected with the evaporator of the corresponding compartment through the electromagnetic valve.
Optionally, the compartment includes a temperature sensor, an evaporator and a heater, and the temperature sensor, the evaporator and the heater are all electrically connected to the controller.
According to the multi-chamber energy-saving control method and device for the refrigeration system and the refrigeration system, the on-off state of each electromagnetic valve in the refrigeration system, the rotating speed of the variable frequency compressor, the actual temperature of each chamber and the heating output quantity of the heater of each chamber are obtained; the variable frequency compressor is communicated with the corresponding chambers through passages where the electromagnetic valves are located; determining the temperature difference between the actual temperature of each compartment and the corresponding preset target temperature according to the actual temperature of each compartment, and determining the magnitude relation of the heating output of the heater of each compartment according to the heating output of the heater of each compartment; when the electromagnetic valves corresponding to the chambers are switched on, the rotating speed of the variable frequency compressor is smaller than a preset rotating speed threshold value, the temperature difference is within a preset temperature difference range, and the heating output quantity is larger than a preset heating output quantity threshold value, the current opening degree of the electronic expansion valve corresponding to the chambers is controlled to be reduced by a preset opening degree every preset time according to the size relation of the heating output quantity, and the opening degree of the electronic expansion valve is controlled to be larger than a preset minimum opening degree. According to the multi-compartment energy-saving control method and device for the refrigeration system and the refrigeration system provided by the embodiment of the invention, when the electromagnetic valves corresponding to the compartments are switched on, the rotating speed of the variable frequency compressor is smaller than the preset rotating speed threshold value, the temperature difference is within the preset temperature difference range, and the heating output quantity is larger than the preset heating output quantity threshold value, the current opening degree of the electronic expansion valve corresponding to the compartment is controlled to be reduced by the preset opening degree every preset time according to the magnitude relation of the heating output quantity, and the opening degree of the electronic expansion valve is controlled to be larger than the preset minimum opening degree, so that the compartment flow is reduced, the energy-saving control of the compartments is realized, and the energy consumption of.
Drawings
Fig. 1 is a flowchart of a multi-compartment energy-saving control method for a refrigeration system according to an embodiment of the present invention;
fig. 2 is a flowchart of a multi-compartment energy saving control method for a refrigeration system according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a refrigeration system according to a second embodiment of the present invention;
fig. 4 is a block diagram of a multi-compartment energy-saving control device of a refrigeration system according to a third embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a flowchart of a multi-compartment energy-saving control method for a refrigeration system according to an embodiment of the present invention, where this embodiment is applicable to energy-saving control of each compartment of the refrigeration system, and the method may be implemented by a multi-compartment energy-saving control apparatus for a refrigeration system, where the apparatus may be implemented by software and/or hardware, and the apparatus may be integrated in an electronic device, such as a computer, having a multi-compartment energy-saving control function for a refrigeration system, and the method specifically includes the following steps:
and step 110, acquiring the on-off state of each electromagnetic valve in the refrigeration system, the rotating speed of the variable frequency compressor, the actual temperature of each compartment and the heating output quantity of the heater of each compartment.
The electromagnetic valves correspond to the chambers one to one, corresponding preset target temperatures are arranged in the chambers, and the variable frequency compressor is communicated with the corresponding chambers through passages where the electromagnetic valves are located. Each compartment is provided with a corresponding temperature sensor, and the multi-compartment energy-saving control device of the refrigeration system can obtain the actual temperature of the compartment through a port which is arranged on the multi-compartment energy-saving control device and electrically connected with the temperature sensors of the compartments.
And step 120, determining the temperature difference between the actual temperature of each compartment and the corresponding preset target temperature according to the actual temperature of each compartment, and determining the magnitude relation of the heating output of the heater of each compartment according to the heating output of the heater of each compartment.
The temperature unit may be celsius, the preset target temperatures of the chambers may be the same or different, and the specific values of the preset target temperatures may be set according to actual conditions, which is not limited herein.
And step 130, when the electromagnetic valves corresponding to the chambers are switched on, the rotating speed of the variable frequency compressor is less than a preset rotating speed threshold value, the temperature difference is within a preset temperature difference range, and the heating output quantity is greater than a preset heating output quantity threshold value, controlling the current opening degree of the electronic expansion valve corresponding to the chambers to be reduced by a preset opening degree at preset time intervals according to the size relation of the heating output quantity, and controlling the opening degree of the electronic expansion valve to be greater than a preset minimum opening degree.
Specifically, for example, the refrigeration system includes two chambers, namely a first chamber and a second chamber, the first chamber and the second chamber respectively correspond to a first solenoid valve and a second solenoid valve, the first chamber and the second chamber respectively correspond to a first electronic expansion valve and a second electronic expansion valve, the first solenoid valve and the first electronic expansion valve are in the same passage, and the second solenoid valve and the second electronic expansion valve are in the same passage. For example, when the first electromagnetic valve and the second electromagnetic valve are both turned on, the rotation speed of the inverter compressor is less than a preset rotation speed threshold, the temperature difference of the first compartment and the temperature difference of the second compartment are both within a preset temperature difference range, and the heating output quantity of the first compartment is greater than a preset heating output quantity threshold, if the heating output quantity of the first compartment is greater than the heating output quantity of the second compartment, the current opening degree of the first electronic expansion valve is controlled to be reduced by a preset opening degree every preset time, and the opening degree of the first electronic expansion valve is controlled to be greater than a preset minimum opening degree, so that the flow of the first compartment is reduced, the energy-saving control of the first compartment is realized, and the energy consumption of the compartment is reduced.
In the multi-compartment energy-saving control method for the refrigeration system provided by this embodiment, when the electromagnetic valves corresponding to the compartments are turned on, the rotation speed of the inverter compressor is less than the preset rotation speed threshold, the temperature difference is within the preset temperature difference range, and the heating output is greater than the preset heating output threshold, according to the magnitude relationship of the heating output, the current opening of the electronic expansion valve corresponding to the compartment is controlled to decrease the preset opening every preset time, and the opening of the electronic expansion valve is controlled to be greater than the preset minimum opening, so as to decrease the compartment flow, implement energy-saving control of the compartments, and thus reduce energy consumption of the compartments.
Example two
Fig. 2 is a flowchart of a multi-compartment energy-saving control method for a refrigeration system according to a second embodiment of the present invention, where this embodiment is applicable to energy-saving control of each compartment of the refrigeration system, and the method may be executed by a multi-compartment energy-saving control device for a refrigeration system, where the device may be implemented by software and/or hardware, and the device may be integrated in an electronic device, such as a computer, having a multi-compartment energy-saving control function for a refrigeration system, and the method specifically includes the following steps:
and step 210, acquiring the on-off state of each electromagnetic valve in the refrigeration system, the rotating speed of the variable frequency compressor, the actual temperature of each compartment and the heating output quantity of the heater of each compartment.
The chambers are provided with corresponding preset target temperatures, and the preset target temperatures set by the chambers can be the same or different. Fig. 3 is a schematic structural diagram of a refrigeration system according to a second embodiment of the present invention, referring to fig. 3, the refrigeration system includes an inverter compressor 10, a controller 20, at least two compartments 30, at least two solenoid valves 40 corresponding to the at least two compartments one to one, and at least two electronic expansion valves 50 corresponding to the at least two compartments one to one, and a multi-compartment control device of the refrigeration system is integrated in the controller 20; the electromagnetic valve 40 and the electronic expansion valve 50 are both electrically connected to the controller 20, and the inverter compressor 10 is connected to the evaporator 60 of the corresponding compartment 30 through a passage in which the electromagnetic valve 40 is located. The controller 20 is also electrically connected to the inverter compressor 10 and can control the rotation speed of the inverter compressor 10. Fig. 3 exemplifies that the refrigeration system includes two compartments 30, and the inverter compressor 10 in the refrigeration system works for the two compartments 30 to realize parallel cycle refrigeration, i.e., the parallel cycle refrigeration system. The compartment 30 includes a temperature sensor 70, an evaporator 60 and a heater 80, and the temperature sensor 70, the evaporator 60 and the heater 80 are all electrically connected with the controller 20; the heater 81 of the first compartment 31 and the heater 82 of the second compartment 32 output heat to the first compartment 31 and the second compartment 32, respectively, to meet the compartment requirements. The first electromagnetic valve 41 and the first electronic expansion valve 51 are in the same passage, the second electromagnetic valve 42 and the second electronic expansion valve 52 are in the same passage, the inverter compressor 10 is connected with the evaporator 61 of the first compartment 31 through the passage where the first electromagnetic valve 41 is located and is connected with the evaporator 62 of the second compartment 32 through the passage where the second electromagnetic valve 42 is located, the inverter compressor 10 compresses sucked gas and transmits the compressed gas to the condenser 90 through a gas pipeline for condensation, so that the condensed refrigerant is transmitted to the first compartment 31 through the passage where the first electromagnetic valve 41 is located and is transmitted to the second compartment 32 through the passage where the second electromagnetic valve 42 is located. The multi-compartment energy-saving control device of the refrigeration system integrated in the controller 20 may acquire the temperature of the corresponding compartment 30 through the temperature sensor 70, and may also acquire the on-off state of each solenoid valve 40 and the current opening degree of each electronic expansion valve 50 to perform energy-saving control on each compartment 30.
And step 220, determining the temperature difference between the actual temperature of each compartment and the corresponding preset target temperature according to the actual temperature of each compartment, and determining the magnitude relation of the heating output of the heater of each compartment according to the heating output of the heater of each compartment.
The temperature unit may be celsius, the preset target temperatures of the chambers may be the same or different, and the specific values of the preset target temperatures may be set according to actual conditions, which is not limited herein.
Step 230, controlling the first preset electronic opening degree (HMV) 3 [ HMV ] L or T2 [ HMV ] 4 [ HMV ] H or T2 [ HMV ] 4642 [ delta ] T _ H, EV1 ] Δ T1 [ delta ] T12 ] Δ T2 [ delta ] T22 ], if the first preset electronic opening degree (HMV 573) is greater than the first preset electronic opening degree (HMV 573) Δ T2, if the first preset electronic opening degree (HMV) Δ T19 [ delta ] T8 [ delta ] T22 ] Δ T1HMV ] THMV, if the first preset electronic opening degree (HMV) C _ rpm [ delta ] Min + C _ b ], if the first preset electronic opening degree (T1 _ PV) T1_ PV _ dt [ delta ] T2_ PV ] T2_ PV _ dt [ delta ] T1_ PV 19 _ T2_ PV [ delta ] Δ T _ PV _ dt, if the first preset electronic opening degree (HMV) Δ HMV 3 [ delta ] HMV ] Δ T4 [ delta ] HMV ] Δ T H, EV1 ] Δ HMV ] Δ T4 [ delta ] HMV ] Δ T465 ] or the first preset electronic opening degree (HMV [ delta ] Min [ delta ] HMV 4624 [ delta ] HMV ] is greater than the preset electronic opening degree (HMV).
Wherein r1 ═ 1 denotes that the first solenoid valve 41 is in the on state, r2 ═ 1 denotes that the second solenoid valve 42 is in the on state, Δ T1 denotes the temperature difference of the first compartment 31, Δ T11 and Δ T12 denote the minimum value and the maximum value, respectively, of the preset temperature difference range of Δ T1, Δ T2 denotes the temperature difference of the second compartment 32, Δ T21 and Δ T22 denote the minimum value and the maximum value, respectively, of the preset temperature difference range of Δ T2, T1HMV, T2HMV, and THMV denote the heating output of the first compartment 31, the heating output of the second compartment 32, and the preset heating output threshold value, C _ rpm, Min (Comp), and C _ b denote the actual rotational speed of the inverter compressor 10, the preset rotational speed threshold value, and the preset rotational speed, T1_ PV and T1_ PV _ dt denote the actual temperature of the first compartment 31, the preset temperature value, T2_ PV _ dt, and T2_ dt denote the actual temperature value, and the preset temperature difference of the second compartment 32, respectively, k1, K2, K3 and K4 are coefficients, Δ T1HMV _ L and Δ T1HMV _ H respectively represent a preset heating output minimum value and a preset heating output maximum value of the first compartment 31, Δ T2HMV _ L and Δ T2HMV _ H respectively represent a preset heating output minimum value and a preset heating output maximum value of the second compartment 32, EV1 and Min (EXV1) respectively represent a current opening degree and a preset minimum opening degree of the first electronic expansion valve 51, and EV2 and Min (EXV2) respectively represent a current opening degree and a preset minimum opening degree of the second electronic expansion valve 52.
Specifically, when T1_ PV is greater than or equal to T _ dH (T _ dH is a preset target temperature), Δ T1HMV _ L is associated, i.e., the T1HMV and K1 × Δ T1HMV _ L are compared in size; when T1_ PV < T _ dH, the correlation Δ T1HMV _ H, i.e. T1HMV and K2 × Δ T1HMV _ H, are of comparable size; when T2_ PV is larger than or equal to T _ dH, the correlation delta T2HMV _ L, namely T2HMV, is compared with the needed K3 delta T2HMV _ L; when T2_ PV < T _ dH, the correlation Δ T2HMV _ H, i.e. T2HMV, is of a greater magnitude than K4 × Δ T2HMV _ H. When the above conditions of this step are satisfied, the current opening degree of the first electronic expansion valve 51 may be controlled to decrease by a preset opening degree every preset time, and the opening degree of the first electronic expansion valve 51 may be controlled to be greater than a preset minimum opening degree, so as to decrease the flow rate of the first compartment 31, implement energy saving control of the first compartment 31, and reduce energy consumption of the first compartment 31.
Specific values of Δ T11, Δ T12, THMV, Min (Comp), C _ b, T1_ PV _ dt, T2_ PV _ dt, Δ T _ PV _ dt, K1, K2, K3, K4, Δ T1HMV _ L, Δ T2HMV _ L, Min (EXV1), Min (EXV2), a preset time, a preset opening degree, and a preset minimum opening degree may be set according to actual conditions, and are not limited herein.
When the above conditions of this step are satisfied, the current opening degree of the second electronic expansion valve 52 may be controlled to decrease by a preset opening degree every preset time, and the opening degree of the second electronic expansion valve 52 is controlled to be greater than a preset minimum opening degree, so as to decrease the flow rate of the second compartment 32, implement energy saving control of the second compartment 32, and reduce energy consumption of the second compartment 32.
And 240, controlling the first electromagnetic valve to keep the current conduction state, and simultaneously controlling the second electromagnetic valve to keep the current conduction state.
Specifically, after the opening degree of the first electronic expansion valve 51 is adjusted, the first electromagnetic valve 41 may be controlled to maintain the current conduction state; likewise, after the opening degree of the second electronic expansion valve 52 is adjusted, the second solenoid valve 42 may be controlled to maintain the current conduction state.
In the multi-compartment energy-saving control method for the refrigeration system provided by this embodiment, when the electromagnetic valves corresponding to the compartments are turned on, the rotation speed of the inverter compressor is less than a preset rotation speed threshold, the temperature difference is within a preset temperature difference range, and the heating output is greater than a preset heating output threshold, if the heating output of the first compartment is greater than the heating output of the second compartment, the current opening of the first electronic expansion valve is controlled to decrease by a preset opening every preset time, and the opening of the first electronic expansion valve is controlled to be greater than a preset minimum opening; and if the heating output quantity of the second compartment is greater than the heating output quantity of the first compartment, controlling the current opening degree of the second electronic expansion valve to reduce the preset opening degree every preset time, and controlling the opening degree of the second electronic expansion valve to be greater than the preset minimum opening degree so as to reduce the flow of each compartment and realize energy-saving control of the compartments, thereby reducing the energy consumption of the compartments.
EXAMPLE III
Fig. 4 is a block diagram of a multi-compartment energy-saving control device of a refrigeration system according to a third embodiment of the present invention, where the device includes an information obtaining module 310, a temperature difference determining module 320, and an energy-saving control module 330; the information obtaining module 310 is configured to obtain a switching state of each electromagnetic valve in the refrigeration system, a rotation speed of the variable frequency compressor, an actual temperature of each compartment, and a heating output of a heater of each compartment; the variable frequency compressor is communicated with the corresponding chambers through passages where the electromagnetic valves are located; the temperature difference determining module 320 is configured to determine a temperature difference between the actual temperature of each compartment and the corresponding preset target temperature according to the actual temperature of each compartment, and determine a magnitude relation of the heating output of the heater of each compartment according to the heating output of the heater of each compartment; the energy-saving control module 330 is configured to, when the electromagnetic valves corresponding to the compartments are turned on, the rotation speed of the inverter compressor is less than a preset rotation speed threshold, the temperature difference is within a preset temperature difference range, and the heating output is greater than a preset heating output threshold, control the current opening of the electronic expansion valve corresponding to the compartment to decrease by a preset opening every preset time according to the magnitude relationship of the heating output, and control the opening of the electronic expansion valve to be greater than a preset minimum opening.
On the basis of the above embodiment, the solenoid valve includes a first solenoid valve and a second solenoid valve, the electronic expansion valve includes a first electronic expansion valve and a second electronic expansion valve, and the compartment includes a first compartment and a second compartment; the energy saving control module 330 comprises an opening control unit for controlling a first opening of the first expansion valve 2 or the second expansion valve 2 according to a first heating output (e.g. first opening of the first expansion valve 2 or second opening of the first expansion valve 2) and a second opening of the second expansion valve 2 or third expansion valve (e.g. second opening of the first expansion valve 2 or third expansion valve) when r1 is 1 and r2 is 1, Δ T11 ≦ Δ T1 ≦ Δ T12 and Δ T21 ≦ Δ T2 ≦ Δ T22, | T1HMV-T2HMV | > THMV, C _ rpm ≦ Min (comp) + C _ b, T1_ PV ≧ T1_ PV — dt and T2_ PV ≧ T2_ PV ≧ T _ PV | >, and | T1_ PV-T2_ PV | > Δ T _ PV ≧ T _ dt, T1HMV ≧ Δ K1 ≧ HMV _ L or T1HMV ≧ K2 ≧ Δ T1HMV _ H or T2HMV 3 ≧ Δ T2_ m 4624 ≧ Δ T2 ≧ HMV _ 4624; wherein r1 ═ 1 denotes that the first solenoid valve is in an on state, r2 ═ 1 denotes that the second solenoid valve is in an on state, Δ T1 denotes a temperature difference of the first compartment, Δ T11 and Δ T12 are respectively a minimum value and a maximum value of a preset temperature difference range of Δ T1, Δ T2 denotes a temperature difference of the second compartment, Δ T21 and Δ T22 are respectively a minimum value and a maximum value of a preset temperature difference range of Δ T2, T1HMV, T2HMV and THMV are respectively a heating output of the first compartment, a heating output of the second compartment and a preset heating output threshold value, C _ rpm, Min (Comp) and C _ b are respectively an actual rotation speed of the inverter compressor, a preset rotation speed threshold value and a preset rotation speed deviation value, T1_ PV and T1_ PV _ dt denote respectively an actual temperature and a preset temperature value of the first compartment, T2_ T38 _ PV _ dt denotes respectively a temperature of the second compartment, a temperature coefficient of the second compartment, a preset temperature coefficient of 39k 59648 and a preset temperature coefficient of the second compartment, a preset temperature coefficient of the first compartment, a preset temperature coefficient of the inverter 39k 59648, Δ T1HMV _ L and Δ T1HMV _ H respectively represent a preset heating output minimum value and a preset heating output maximum value of the first compartment, Δ T2HMV _ L and Δ T2HMV _ H respectively represent a preset heating output minimum value and a preset heating output maximum value of the second compartment, EV1 and Min (EXV1) respectively represent a current opening degree and a preset minimum opening degree of the first electronic expansion valve, and EV2 and Min (EXV2) respectively represent a current opening degree and a preset minimum opening degree of the second electronic expansion valve. The first electromagnetic valve and the first electronic expansion valve are in the same passage, and the second electromagnetic valve and the second electronic expansion valve are in the same passage; the variable frequency compressor is communicated with the first chamber through a passage where the first electromagnetic valve is located, and is communicated with the second chamber through a passage where the second electromagnetic valve is located.
Preferably, the opening degree control unit includes a first opening degree control subunit, and the first opening degree control subunit is configured to, if T1HMV > T2HMV, control the current opening degree of the first electronic expansion valve to decrease by a preset opening degree every preset time, and control the opening degree of the first electronic expansion valve to be greater than a preset minimum opening degree.
Preferably, the opening degree control unit includes a second opening degree control subunit, and the second opening degree control subunit is configured to, if T2HMV > T1HMV, control the current opening degree of the second electronic expansion valve to decrease by a preset opening degree every preset time, and control the opening degree of the second electronic expansion valve to be greater than a preset minimum opening degree.
Preferably, the energy-saving control module 330 further includes a state control unit, and the state control unit is configured to control the first electromagnetic valve to maintain the current conduction state, and simultaneously control the second electromagnetic valve to maintain the current conduction state.
The refrigeration system multi-chamber energy-saving control device provided by the embodiment and the refrigeration system multi-chamber energy-saving control method provided by any embodiment of the invention belong to the same inventive concept, have corresponding beneficial effects, and detailed technical details in the embodiment are not shown in the refrigeration system multi-chamber energy-saving control method provided by any embodiment of the invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A multi-chamber energy-saving control method for a refrigerating system is characterized by comprising the following steps:
acquiring the on-off state of each electromagnetic valve in the refrigeration system, the rotating speed of the variable frequency compressor, the actual temperature of each compartment and the heating output quantity of a heater of each compartment; the variable frequency compressor is communicated with the corresponding chambers through passages where the electromagnetic valves are located;
determining the temperature difference between the actual temperature of each compartment and the corresponding preset target temperature according to the actual temperature of each compartment, and determining the magnitude relation of the heating output of the heater of each compartment according to the heating output of the heater of each compartment;
when the electromagnetic valves corresponding to the chambers are switched on, the rotating speed of the variable frequency compressor is smaller than a preset rotating speed threshold value, the temperature difference is within a preset temperature difference range, and the heating output quantity is larger than a preset heating output quantity threshold value, the current opening degree of the electronic expansion valve corresponding to the chambers is controlled to be reduced by a preset opening degree every preset time according to the size relation of the heating output quantity, and the opening degree of the electronic expansion valve is controlled to be larger than a preset minimum opening degree.
2. The multi-chamber energy-saving control method of the refrigerating system according to claim 1, wherein the solenoid valve comprises a first solenoid valve and a second solenoid valve, the electronic expansion valve comprises a first electronic expansion valve and a second electronic expansion valve, and the chamber comprises a first chamber and a second chamber;
when the electromagnetic valves corresponding to the chambers are switched on, the rotating speed of the variable frequency compressor is smaller than a preset rotating speed threshold value, the temperature difference is within a preset temperature difference range, and the heating output quantity is larger than a preset heating output quantity threshold value, the current opening degree of the electronic expansion valve corresponding to the chambers is controlled to be reduced by a preset opening degree every preset time according to the size relation of the heating output quantity, and the method comprises the following steps:
controlling a first opening of the expansion valve (EXV). DELTA.T 2HMV _ L or T2 HMV.DELTA.K 4 HMV _ H, EV1 > Min (EXV). DELTA.T 24, the first opening of the expansion valve (EXV). DELTA.T 11 ≦ Δ T12 and Δ T21 ≦ Δ T2 ≦ Δ T22, | T1HMV-T2HMV | > THMV, C _ rpm ≦ Min (Comp) + C _ b, T1_ PV ≧ T1_ PV _ dt and T2_ PV ≧ T2_ PV _ dt and | T1_ PV-T2_ PV | >. Δ T _ PV _ dt, T1HMV ≧ K1 Δ T1HMV _ L or T1HMV ≧ K2 ≧ T1HMV _ H or T2HMV ≧ K3 _ HMV ≧ T2HMV _ L or T2HMV ≧ K4 Δ T2HMV _ H, EV1 ≧ HMV _ Min 5, or the first opening of the first expansion valve (EXV) and the second expansion valve (EXV). Wherein r1 ═ 1 indicates that the first solenoid valve is in an on state, r2 ═ 1 indicates that the second solenoid valve is in an on state, Δ T1 indicates a temperature difference of the first compartment, Δ T11 and Δ T12 respectively indicate a minimum value and a maximum value of a preset temperature difference range of Δ T1, Δ T2 indicates a temperature difference of the second compartment, Δ T21 and Δ T22 respectively indicate a minimum value and a maximum value of a preset temperature difference range of Δ T2, T1HMV, T2HMV and THMV respectively indicate a heating output of the first compartment, a heating output of the second compartment and a preset heating output threshold, C _ rpm, Min (Comp) and C _ b respectively indicate an actual rotation speed, a preset rotation speed threshold and a preset rotation speed of the inverter compressor, T1_ PV and T1_ PV respectively indicate an actual temperature of the first compartment and a preset temperature deviation of the second compartment PV _ 28 _ T2_ 2 respectively, k1, K2, K3 and K4 are coefficients, Δ T1HMV _ L and Δ T1HMV _ H respectively represent a preset heating output minimum value and a preset heating output maximum value of the first compartment, Δ T2HMV _ L and Δ T2HMV _ H respectively represent a preset heating output minimum value and a preset heating output maximum value of the second compartment, EV1 and Min (EXV1) respectively represent a current opening degree and a preset minimum opening degree of the first electronic expansion valve, and EV2 and Min (EXV2) respectively represent a current opening degree and a preset minimum opening degree of the second electronic expansion valve.
3. The multi-compartment energy-saving control method for the refrigeration system according to claim 2, wherein the controlling the opening degree of the first electronic expansion valve or the opening degree of the second electronic expansion valve according to the magnitude relationship between the heating output quantity of the first compartment and the heating output quantity of the second compartment comprises:
and if the T1HMV is larger than the T2HMV, controlling the current opening degree of the first electronic expansion valve to be reduced by a preset opening degree every preset time, and controlling the opening degree of the first electronic expansion valve to be larger than a preset minimum opening degree.
4. The multi-compartment energy-saving control method for the refrigeration system according to claim 2, wherein the controlling the opening degree of the first electronic expansion valve or the opening degree of the second electronic expansion valve according to the magnitude relationship between the heating output quantity of the first compartment and the heating output quantity of the second compartment comprises:
and if the T2HMV is larger than the T1HMV, controlling the current opening degree of the second electronic expansion valve to be reduced by a preset opening degree every preset time, and controlling the opening degree of the second electronic expansion valve to be larger than a preset minimum opening degree.
5. The multi-compartment energy-saving control method for a refrigeration system according to claim 2, wherein after controlling the opening degree of the first electronic expansion valve or the opening degree of the second electronic expansion valve according to the magnitude relationship between the heating output quantity of the first compartment and the heating output quantity of the second compartment, the method comprises:
and controlling the first electromagnetic valve to keep the current conduction state, and simultaneously controlling the second electromagnetic valve to keep the current conduction state.
6. The multi-compartment energy-saving control method of a refrigerating system according to claim 2, wherein the first solenoid valve and the first electronic expansion valve are in the same passage, and the second solenoid valve and the second electronic expansion valve are in the same passage; and the variable frequency compressor is communicated with the first chamber through a passage where the first electromagnetic valve is located and is communicated with the second chamber through a passage where the second electromagnetic valve is located.
7. The refrigerant system multi-compartment energy-saving control method as set forth in claim 1, wherein each compartment is provided with a corresponding temperature sensor, and the actual temperature of the compartment is obtained by the corresponding temperature sensor.
8. A multi-chamber energy-saving control device of a refrigerating system is characterized by comprising:
the information acquisition module is used for acquiring the switching state of each electromagnetic valve in the refrigeration system, the rotating speed of the variable frequency compressor, the actual temperature of each compartment and the heating output quantity of the heater of each compartment; the variable frequency compressor is communicated with the corresponding chambers through passages where the electromagnetic valves are located;
the temperature difference determining module is used for determining the temperature difference between the actual temperature of each compartment and the corresponding preset target temperature according to the actual temperature of each compartment, and determining the magnitude relation of the heating output quantity of the heater of each compartment according to the heating output quantity of the heater of each compartment;
and the energy-saving control module is used for controlling the current opening degree of the electronic expansion valve corresponding to the chambers to reduce the preset opening degree at preset intervals according to the magnitude relation of the heating output quantity when the electromagnetic valves corresponding to the chambers are switched on, the rotating speed of the variable frequency compressor is smaller than a preset rotating speed threshold value, the temperature difference is within a preset temperature difference range, and the heating output quantity is larger than a preset heating output quantity threshold value, and controlling the opening degree of the electronic expansion valve to be larger than a preset minimum opening degree.
9. A refrigeration system, comprising: the refrigeration system multi-chamber energy-saving control device of claim 8 is integrated in the controller; the variable frequency compressor, the electromagnetic valve and the electronic expansion valve are all electrically connected with the controller, and the variable frequency compressor is connected with the evaporator of the corresponding compartment through the electromagnetic valve.
10. The refrigerant system as set forth in claim 9, wherein said compartment includes a temperature sensor, an evaporator and a heater, said temperature sensor, said evaporator and said heater all being electrically connected to said controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011597102.8A CN112665253A (en) | 2020-12-28 | 2020-12-28 | Multi-chamber energy-saving control method and device for refrigeration system and refrigeration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011597102.8A CN112665253A (en) | 2020-12-28 | 2020-12-28 | Multi-chamber energy-saving control method and device for refrigeration system and refrigeration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112665253A true CN112665253A (en) | 2021-04-16 |
Family
ID=75410250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011597102.8A Pending CN112665253A (en) | 2020-12-28 | 2020-12-28 | Multi-chamber energy-saving control method and device for refrigeration system and refrigeration system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112665253A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114911286A (en) * | 2022-05-07 | 2022-08-16 | 江苏拓米洛环境试验设备有限公司 | PID control coefficient determination method, device, equipment and medium |
| CN115355637A (en) * | 2021-06-29 | 2022-11-18 | 江苏拓米洛环境试验设备有限公司 | Control method and device for multi-chamber electronic expansion valve of refrigeration system and refrigeration system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1548892A (en) * | 2003-05-22 | 2004-11-24 | 乐金电子(天津)电器有限公司 | Clean internal shell for pickles refrigerator |
| JP2009277080A (en) * | 2008-05-15 | 2009-11-26 | Fuji Electric Retail Systems Co Ltd | Vending machine |
| JP2010014384A (en) * | 2008-07-07 | 2010-01-21 | Sanden Corp | Cooling and heating device |
| JP2013190906A (en) * | 2012-03-13 | 2013-09-26 | Panasonic Corp | Automatic vending machine |
| CN107228529A (en) * | 2017-07-07 | 2017-10-03 | 河南瑞凌科技有限公司 | A kind of family expenses ex situ freeze dryer |
| CN109990536A (en) * | 2017-12-13 | 2019-07-09 | Lg电子株式会社 | Refrigerator |
-
2020
- 2020-12-28 CN CN202011597102.8A patent/CN112665253A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1548892A (en) * | 2003-05-22 | 2004-11-24 | 乐金电子(天津)电器有限公司 | Clean internal shell for pickles refrigerator |
| JP2009277080A (en) * | 2008-05-15 | 2009-11-26 | Fuji Electric Retail Systems Co Ltd | Vending machine |
| JP2010014384A (en) * | 2008-07-07 | 2010-01-21 | Sanden Corp | Cooling and heating device |
| JP2013190906A (en) * | 2012-03-13 | 2013-09-26 | Panasonic Corp | Automatic vending machine |
| CN107228529A (en) * | 2017-07-07 | 2017-10-03 | 河南瑞凌科技有限公司 | A kind of family expenses ex situ freeze dryer |
| CN109990536A (en) * | 2017-12-13 | 2019-07-09 | Lg电子株式会社 | Refrigerator |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115355637A (en) * | 2021-06-29 | 2022-11-18 | 江苏拓米洛环境试验设备有限公司 | Control method and device for multi-chamber electronic expansion valve of refrigeration system and refrigeration system |
| CN115355637B (en) * | 2021-06-29 | 2023-09-15 | 江苏拓米洛高端装备股份有限公司 | Control method and device for multi-chamber electronic expansion valve of refrigeration system and refrigeration system |
| CN114911286A (en) * | 2022-05-07 | 2022-08-16 | 江苏拓米洛环境试验设备有限公司 | PID control coefficient determination method, device, equipment and medium |
| CN114911286B (en) * | 2022-05-07 | 2023-07-07 | 江苏拓米洛高端装备股份有限公司 | PID control coefficient determining method, device, equipment and medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112665254B (en) | Control method and device for multi-chamber electronic expansion valve of refrigeration system and refrigeration system | |
| CN112665253A (en) | Multi-chamber energy-saving control method and device for refrigeration system and refrigeration system | |
| US20130025304A1 (en) | Loading and unloading of compressors in a cooling system | |
| CN105674610B (en) | A kind of method for controlling flow of refrigerant system and refrigerator | |
| CN103348202B (en) | Control the method for the double suction air compressor being used for refrigeration system | |
| MX2013009487A (en) | Cascade floating intermediate temperature heat pump system. | |
| CN108613453B (en) | Refrigerating module for refrigerator and control method thereof | |
| CA2868282A1 (en) | Hvac control system and method | |
| CN111140984A (en) | Water multi-connected central air conditioner control method, computer readable storage medium and air conditioner | |
| CN105180587A (en) | Refrigerator and control method thereof | |
| WO2013096902A1 (en) | Centralized multi-function heat exchange system | |
| CN109084433A (en) | Capacity output control, equipment and the medium of air conditioner indoor unit | |
| CN203687437U (en) | Refrigerating system with refrigerating capacity adjusting function and environmental laboratory | |
| CN113457752A (en) | Control method of alternating damp-heat test chamber and alternating damp-heat test chamber | |
| CN112665248B (en) | Multi-chamber flow control method and device of refrigeration system and refrigeration system | |
| CN108224823A (en) | Full load air-conditioning device and its control method | |
| CN112665251B (en) | Control method and device for variable-frequency compressor of refrigerating system and refrigerating system | |
| CN112665255A (en) | Multi-compartment top layer mode control method and device for refrigeration system and refrigeration system | |
| GB2578022A (en) | Refrigeration air conditioning system | |
| CN112665249A (en) | Multi-chamber control method and device for refrigeration system and refrigeration system | |
| WO2018145619A1 (en) | Refrigerator control method and refrigerator | |
| CN114992803A (en) | Control method and device for air supply and enthalpy increase of heat pump air conditioner and heat pump air conditioner | |
| CN114087738A (en) | Control method and device of air conditioner, storage medium and air conditioner | |
| CN110542229A (en) | air conditioner, control method and device thereof, and computer-readable storage medium | |
| CN110542227A (en) | Air conditioner, control method and device thereof, and computer-readable storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210416 |
|
| RJ01 | Rejection of invention patent application after publication |