CN114877576B - Variable frequency compressor control method and device of refrigeration system and refrigeration system - Google Patents

Variable frequency compressor control method and device of refrigeration system and refrigeration system Download PDF

Info

Publication number
CN114877576B
CN114877576B CN202210508797.0A CN202210508797A CN114877576B CN 114877576 B CN114877576 B CN 114877576B CN 202210508797 A CN202210508797 A CN 202210508797A CN 114877576 B CN114877576 B CN 114877576B
Authority
CN
China
Prior art keywords
compartment
preset
electromagnetic valve
t1hmv
temperature difference
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.)
Active
Application number
CN202210508797.0A
Other languages
Chinese (zh)
Other versions
CN114877576A (en
Inventor
周栋
张洪阳
张波
方忠诚
晏刚
鱼剑琳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu Tuomiluo High End Equipment Co ltd
Original Assignee
Jiangsu Tuomiluo High End Equipment Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Jiangsu Tuomiluo High End Equipment Co ltd filed Critical Jiangsu Tuomiluo High End Equipment Co ltd
Priority to CN202210508797.0A priority Critical patent/CN114877576B/en
Publication of CN114877576A publication Critical patent/CN114877576A/en
Application granted granted Critical
Publication of CN114877576B publication Critical patent/CN114877576B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor control arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/025—Compressor control by controlling speed
    • F25B2600/0253—Compressor control by controlling speed with variable speed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The embodiment of the invention discloses a variable frequency compressor control method and device of a refrigeration system and the refrigeration system. The method comprises the following steps: 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; when at least one electromagnetic valve is in a conducting state, if the temperature difference of a corresponding compartment of the electromagnetic valve in the conducting state exceeds a preset first temperature difference threshold value or the heating output of a heater of the corresponding compartment is lower than a preset heating quantity threshold value, controlling the rotating speed of the variable-frequency compressor to rise by a first preset rotating speed value; when at least one electromagnetic valve is in a conducting state, if the temperature difference of the corresponding compartment of the electromagnetic valve in the conducting state is lower than a preset second temperature difference threshold value or the heating output of the heater of the corresponding compartment is higher than a preset target reference value, the rotating speed of the variable-frequency compressor is controlled to be reduced by a second preset rotating speed value. The technical scheme provided by the embodiment of the invention can realize the matching of the actual rotating speed and the actual load of the variable frequency compressor, and reduce the energy consumption.

Description

Variable frequency compressor control method and device of refrigeration system and refrigeration system
Technical Field
The embodiment of the invention relates to a refrigeration technology, in particular to a variable frequency compressor control method and device of a refrigeration system and the refrigeration system. The invention is a division of 2020115970006.
Background
In the refrigerating system, for the refrigerating system applied to the environment test equipment for battery test, an independent refrigerating system and a fixed-frequency compressor are adopted to control an independent compartment, the rotating speed of the fixed-frequency compressor is limited, the fixed-frequency compressor cannot operate at a high speed under full load or at a low speed under light load, the actual rotating speed of the fixed-frequency compressor is possibly not matched with the actual load, and the working condition is not self-adaptive, so that the energy consumption of the refrigerating system is high. For a refrigeration system employing a variable frequency compressor, such as a parallel circulation refrigeration system, reliable control of the variable frequency compressor is required to ensure low power consumption operation of the refrigeration system.
At present, in the existing variable frequency compressor control method of the refrigeration system, the variation of the control rotating speed is usually fixed when the rotating speed of the variable frequency compressor is regulated, and the rotating speed of the variable frequency compressor is only controlled according to temperature variation or temperature requirements, if the rotating speed of the variable frequency compressor is required to be reduced, the control of the rotating speed of the variable frequency compressor is only related to temperature, the control factor is single, the control reliability of the variable frequency compressor is affected, and the matching degree of the actual rotating speed of the variable frequency compressor and the actual load in the refrigeration system is possibly affected, so that the energy consumption is higher.
Disclosure of Invention
The embodiment of the invention provides a variable frequency compressor control method and device of a refrigeration system and the refrigeration system, so that the actual rotating speed and the actual load of the variable frequency compressor are matched, and the energy consumption is reduced.
In a first aspect, an embodiment of the present invention provides a method for controlling a variable frequency compressor of a refrigeration system, including:
acquiring the switching state of each electromagnetic valve, the actual temperature of each compartment and the heating output quantity of a heater of each compartment in the refrigerating system; the compartments are in one-to-one correspondence with the electromagnetic valves, and the variable frequency compressors are communicated with the corresponding compartments through passages where the electromagnetic valves are positioned; the electromagnetic valve comprises a first electromagnetic valve and a second electromagnetic valve, the compartments comprise a first compartment and a second compartment, and the variable-frequency compressor is connected with the evaporator of the first compartment through a passage where the first electromagnetic valve is positioned and is connected with the evaporator of the second compartment through a passage where the second electromagnetic valve is positioned;
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;
when at least one electromagnetic valve is in a conducting state, if the temperature difference of a corresponding compartment of the electromagnetic valve in the conducting state exceeds a preset first temperature difference threshold value or the heating output of a heater of the corresponding compartment is lower than a preset heating quantity threshold value, controlling the rotating speed of the variable-frequency compressor to rise by a first preset rotating speed value;
when at least one electromagnetic valve is in a conducting state, if the temperature difference of a corresponding compartment of the electromagnetic valve in the conducting state is lower than a preset second temperature difference threshold value or the heating output of a heater of the corresponding compartment is higher than a preset target reference value, controlling the rotating speed of the variable-frequency compressor to be reduced by a second preset rotating speed value;
when at least one electromagnetic valve is in a conducting state, if the temperature difference of the corresponding compartment of the electromagnetic valve in the conducting state is lower than a preset second temperature difference threshold value or the heating output of the heater of the corresponding compartment is higher than a preset target reference value, controlling the rotating speed of the variable frequency compressor to be reduced by a second preset rotating speed value, wherein the method comprises the following steps:
when r1=1 and r2=1, if T1HMV is equal to OR (t1hmv_l, t1hmv_h) and T2HMV is equal to OR (t2hmv_l, t2hmv_h), OR Δt1 is equal to OR less than Δt12 and Δt2 is equal to OR less than Δt22, controlling the rotation speed of the inverter compressor to decrease by a second preset rotation speed value Δrpm2; 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, the values of r1 and r2 are 0 or 1, Δt1 is a temperature difference between an actual temperature of the first chamber and a preset target temperature of the first chamber, Δt12 is a minimum value of a preset temperature difference range of Δt1, Δt2 is a temperature difference between an actual temperature of the second chamber and a preset target temperature of the second chamber, Δt22 is a minimum value of a preset temperature difference range of Δt2, t1HMV, t1hmv_l, and t1hmv_h are the heating output, low target reference value, and high target reference value of the first compartment, respectively, T2HMV, T2hmv_l, and T2hmv_h are the heating output, low target reference value, and high target reference value of the second compartment, respectively, Δrpm2 = Min [ -Rd 1+rd2, 60], rd1 = -r1 INT [ (k3 Δt1) -k4×t1HMV-1], rd 2= -r2 INT [ (k3 Δt2 Δt2×Δt2) -k4×t2HMV-1], and K3 and K4 are coefficients;
or alternatively, the first and second heat exchangers may be,
when r1=1 and r2=0, if T1HMV is equal to OR (t1hmv_l, t1hmv_h) OR Δt1 is equal to OR less than Δt12, controlling the rotation speed of the inverter compressor to be reduced by a second preset rotation speed value Δrpm2; wherein r2=0 indicates that the second solenoid valve is in an open state;
or alternatively, the first and second heat exchangers may be,
when r1=0 and r2=1, if T2HMV is equal to OR (T2 hmv_l, T2 hmv_h) OR Δt2 is equal to OR less than Δt22, controlling the rotation speed of the inverter compressor to be reduced by a second preset rotation speed value Δrpm2; where r1=0 indicates that the first solenoid valve is in an open state.
In a second aspect, an embodiment of the present invention further provides a variable frequency compressor control device of a refrigeration system, including:
the data state acquisition module is used for acquiring the switching state of each electromagnetic valve, the actual temperature of each compartment and the heating output quantity of the heater of each compartment in the refrigerating system; the compartments are in one-to-one correspondence with the electromagnetic valves, and the variable frequency compressors are communicated with the corresponding compartments through passages where the electromagnetic valves are positioned; the electromagnetic valve comprises a first electromagnetic valve and a second electromagnetic valve, the compartments comprise a first compartment and a second compartment, and the variable-frequency compressor is connected with the evaporator of the first compartment through a passage where the first electromagnetic valve is positioned and is connected with the evaporator of the second compartment through a passage where the second electromagnetic valve is positioned;
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;
the first control module of the rotational speed, is used for when at least one electromagnetic valve is in the conducting state, if the temperature difference of the corresponding compartment of electromagnetic valve of the conducting state exceeds the first temperature difference threshold value of presetting, or the heating output of the heater of the corresponding compartment is lower than the threshold value of presettingheating amount, then control the rotational speed of the variable-frequency compressor to rise by the first preset rotational speed value;
the rotating speed second control module is used for controlling the rotating speed of the variable-frequency compressor to be reduced by a second preset rotating speed value if the temperature difference of the corresponding compartment of the electromagnetic valve in the on state is lower than a preset second temperature difference threshold value or the heating output of the heater of the corresponding compartment is higher than a preset target reference value when at least one electromagnetic valve is in the on state; the rotation speed second control module is specifically configured to control the rotation speed of the inverter compressor to decrease by a second preset rotation speed value Δrpm2 if t1hmv is greater than OR equal to OR (t1hmv_l, t1hmv_h) and t2hmv is greater than OR equal to OR (t2hmv_l, t2hmv_h), OR Δt1 is less than OR equal to Δt12 and Δt2 is less than OR equal to Δt22 when r1=1 and r2=1; 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, the values of r1 and r2 are 0 or 1, Δt1 is a temperature difference between an actual temperature of the first chamber and a preset target temperature of the first chamber, Δt12 is a minimum value of a preset temperature difference range of Δt1, Δt2 is a temperature difference between an actual temperature of the second chamber and a preset target temperature of the second chamber, Δt22 is a minimum value of a preset temperature difference range of Δt2, t1HMV, t1hmv_l, and t1hmv_h are the heating output, low target reference value, and high target reference value of the first compartment, respectively, T2HMV, T2hmv_l, and T2hmv_h are the heating output, low target reference value, and high target reference value of the second compartment, respectively, Δrpm2 = Min [ -Rd 1+rd2, 60], rd1 = -r1 INT [ (k3 Δt1) -k4×t1HMV-1], rd 2= -r2 INT [ (k3 Δt2 Δt2×Δt2) -k4×t2HMV-1], and K3 and K4 are coefficients; OR when r1=1 and r2=0, if T1HMV is equal to OR (t1hmv_l, t1hmv_h) OR Δt1 is equal to OR less than Δt12, controlling the rotation speed of the inverter compressor to be reduced by a second preset rotation speed value Δrpm2; wherein r2=0 indicates that the second solenoid valve is in an open state; OR when r1=0 and r2=1, if T2HMV is equal to OR (t2hmv_l, t2hmv_h) OR Δt2 is equal to OR less than Δt22, controlling the rotation speed of the inverter compressor to be reduced by a second preset rotation speed value Δrpm2; where r1=0 indicates that the first solenoid valve is in an open state.
In a third aspect, an embodiment of the present invention further provides a refrigeration system, including: the variable frequency compressor, the controller, at least two compartments and at least two electromagnetic valves corresponding to the at least two compartments one by one, wherein the variable frequency compressor control device of the refrigeration system according to the second aspect is integrated in the controller; the variable frequency compressor is electrically connected with the controller, and is connected with the evaporator of the corresponding compartment through a passage where the electromagnetic valve is positioned.
Optionally, the compartment includes a temperature sensor, an evaporator, and a heater, each of which is electrically connected to the controller.
According to the variable frequency compressor control method and device of the refrigerating system and the refrigerating system, the temperature difference between the actual temperature of each compartment and the corresponding preset target temperature is determined according to the obtained actual temperature of each compartment; when at least one electromagnetic valve is in a conducting state, if the temperature difference of a corresponding compartment of the electromagnetic valve in the conducting state exceeds a preset first temperature difference threshold value or the heating output of a heater of the corresponding compartment is lower than a preset heating quantity threshold value, controlling the rotating speed of the variable-frequency compressor to rise by a first preset rotating speed value; when at least one electromagnetic valve is in a conducting state, if the temperature difference of the corresponding compartment of the electromagnetic valve in the conducting state is lower than a preset second temperature difference threshold value or the heating output of the heater of the corresponding compartment is higher than a preset target reference value, the rotating speed of the variable-frequency compressor is controlled to be reduced by a second preset rotating speed value. According to the variable frequency compressor control method and device of the refrigerating system and the refrigerating system, the rotating speed of the variable frequency compressor is controlled to rise by a first preset rotating speed value or fall by a second preset rotating speed value according to the temperature difference of the corresponding compartments of the electromagnetic valve in the on state or the heating output of the heater of the corresponding compartment, so that when the load of at least one compartment is increased, the rotating speed of the compressor is controlled to be reduced or increased according to the temperature difference of each compartment or the heating output of the heater of each compartment, and the actual rotating speed of the variable frequency compressor is matched with the actual load, so that the energy consumption is reduced.
Drawings
Fig. 1 is a flowchart of a control method of a variable frequency compressor of a refrigeration system according to an embodiment of the present invention;
fig. 2 is a flowchart of a control method of a variable frequency compressor of 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 control device for a variable frequency compressor of a refrigeration system according to a third embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Example 1
Fig. 1 is a flowchart of a method for controlling a variable frequency compressor of a refrigeration system according to a first embodiment of the present invention, where the method may be implemented by a variable frequency compressor control device of the refrigeration system, where the device may be implemented by software and/or hardware, and where the device may be integrated into an electronic apparatus, such as a computer, having a function for controlling the variable frequency compressor of the refrigeration system, and the method specifically includes the following steps:
step 110, acquiring the switching state of each electromagnetic valve, the actual temperature of each compartment and the heating output quantity of the heater of each compartment in the refrigeration system.
The compartments are in one-to-one correspondence with the electromagnetic valves, and the variable frequency compressors are communicated with the corresponding compartments through passages where the electromagnetic valves are located. The variable frequency compressor control device of the refrigerating system can respectively acquire the switching state of the electromagnetic valve, the actual temperature of each chamber and the heating output quantity of the heater of each chamber through a port which is arranged on the device and is electrically connected with the electromagnetic valve, a port which is electrically connected with the temperature sensor of each chamber and a port which is electrically connected with the heater of each chamber, so as to control the variable frequency compressor according to the acquired information.
And 120, determining a temperature difference between the actual temperature of each compartment and a corresponding preset target temperature according to the actual temperature of each compartment.
Wherein, the temperature unit can be the temperature of the chamber, and the difference between the actual temperature of the chamber and the corresponding preset target temperature, such as-40 ℃, is taken as the temperature difference of the chamber. The preset target temperatures of the chambers may be the same or different, and specific values of the preset target temperatures may be set according to actual conditions, which are not limited herein.
And 130, when at least one electromagnetic valve is in a conducting state, if the temperature difference of the corresponding compartment of the electromagnetic valve in the conducting state exceeds a preset first temperature difference threshold value or the heating output of the heater of the corresponding compartment is lower than a preset heating quantity threshold value, controlling the rotating speed of the variable frequency compressor to rise by a first preset rotating speed value.
Specifically, taking an example that the refrigerating system comprises a first compartment and a second compartment, the first compartment and the second compartment respectively correspond to a first electromagnetic valve and a second electromagnetic valve, when the first electromagnetic valve is in a conducting state, if the temperature difference of the first compartment exceeds a preset first temperature difference threshold value, such as 0.2 ℃, or the heating output of a heater of the first compartment is lower than a preset heating quantity threshold value, the rotating speed of the variable frequency compressor is controlled to rise by a first preset rotating speed value. The first preset rotational speed value may be a rotational speed value related to a temperature difference of the first compartment.
It should be noted that, specific values of the preset first temperature difference threshold and the preset heating amount threshold may be set according to actual situations, and are not limited herein.
And 140, when at least one electromagnetic valve is in a conducting state, if the temperature difference of the corresponding chamber of the electromagnetic valve in the conducting state is lower than a preset second temperature difference threshold value or the heating output of the heater of the corresponding chamber is higher than a preset target reference value, controlling the rotating speed of the variable frequency compressor to be reduced by a second preset rotating speed value.
Specifically, taking an example that the refrigerating system comprises a first compartment and a second compartment, the first compartment and the second compartment respectively correspond to a first electromagnetic valve and a second electromagnetic valve, when the second electromagnetic valve is in a conducting state, if the temperature difference of the second compartment is lower than a preset second temperature difference threshold value, such as-0.2 ℃, or the heating output of a heater of the second compartment is higher than a preset target reference value, the rotating speed of the variable frequency compressor is controlled to be reduced by a second preset rotating speed value. The second preset rotational speed value may be a rotational speed value related to both the temperature difference of each compartment and the heating output of the heater of each compartment.
It should be noted that, specific values of the preset second temperature difference threshold and the preset target reference value may be set according to actual situations, which is not limited herein.
According to the variable frequency compressor control method of the refrigerating system, according to the temperature difference of the corresponding compartments of the electromagnetic valve in the on state or the heating output of the heater of the corresponding compartments, the rotating speed of the variable frequency compressor is controlled to rise by a first preset rotating speed value or fall by a second preset rotating speed value, so that when the load of at least one compartment is increased, the rotating speed of the compressor is controlled to fall or rise by the temperature difference of each compartment or the heating output of the heater of each compartment, and the actual rotating speed of the variable frequency compressor is matched with the actual load, so that the energy consumption is reduced.
Example two
Fig. 2 is a flowchart of a control method of a variable frequency compressor of a refrigeration system according to a second embodiment of the present invention, and fig. 3 is a schematic structural diagram of a refrigeration system according to a second embodiment of the present invention, where the method may be performed by a variable frequency compressor control device of a refrigeration system, and 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 function of controlling the variable frequency compressor of the refrigeration system, and the method specifically includes the following steps:
step 210, acquiring the switching state of each electromagnetic valve, the actual temperature of each compartment and the heating output quantity of the heater of each compartment in the refrigeration system.
Specifically, referring to fig. 3, the refrigeration system includes a variable frequency compressor 10, a controller 20, at least two compartments 30, and at least two solenoid valves 40 in one-to-one correspondence with the at least two compartments 30, and a variable frequency compressor control device of the refrigeration system is integrated in the controller 20; the inverter compressor 10 is electrically connected to the controller 20, and the inverter compressor 10 is connected to the evaporator 50 of the corresponding compartment 30 through a passage in which the solenoid valve 40 is located. In fig. 3, two compartments 30 are taken as an example, and the variable frequency compressor 10 in the refrigeration system works for the two compartments 30 to realize parallel circulation refrigeration, and the refrigeration system is a parallel circulation refrigeration system. The chamber 30 includes a temperature sensor 70, an evaporator 50, and a heater 80, the temperature sensor 70, the evaporator 50, and the heater 80 are electrically connected to the controller 20, the heater 81 of the first chamber 31 and the heater 82 of the second chamber 32 output heat to the first chamber 31 and the second chamber 32, respectively, the inverter compressor 10 is connected to the evaporator 51 of the first chamber 31 through a passage in which the first solenoid valve 41 is located, and to the evaporator 52 of the second chamber 32 through a passage in which the second solenoid valve 42 is located, and the inverter compressor 10 compresses the sucked gas and then transmits the compressed gas to the condenser 60 through a gas line to be condensed, so that the condensed refrigerant is transmitted to the first chamber 31 through a passage in which the first solenoid valve 41 is located, and is transmitted to the second chamber 32 through a passage in which the second solenoid valve 42 is located. The inverter compressor control device integrated in the controller 20 obtains the on-off state of the first solenoid valve 41 through a port electrically connected with the first solenoid valve 41, obtains the on-off state of the second solenoid valve 42 through a port electrically connected with the second solenoid valve 42, and can also obtain the temperature of the first compartment 31 and the temperature of the second compartment 32 through the temperature sensor 71 of the first compartment 31 and the temperature sensor 72 of the second compartment 32, respectively, so as to control the inverter compressor 10.
Step 220, determining a temperature difference between the actual temperature of each compartment and a corresponding preset target temperature according to the actual temperature of each compartment.
Wherein, the temperature unit can be the temperature of the chamber, and the difference between the actual temperature of the chamber and the corresponding preset target temperature, such as-40 ℃, is taken as the temperature difference of the chamber. The preset target temperatures of the chambers may be the same or different, and specific values of the preset target temperatures may be set according to actual conditions, which are not limited herein.
In step 230, when r1=1 and r2=1, if Δt1 is greater than or equal to Δt11 or T1HMV is less than or equal to THMV or Δt2 is greater than or equal to Δt21 or T2HMV is less than or equal to THMV, the rotational speed of the variable frequency compressor is controlled to increase by a first preset rotational speed value Δrpm1.
Specifically, r1=1 indicates that the first solenoid valve 41 is in an on state, r2=1 indicates that the second solenoid valve 42 is in an on state, the values of r1 and r2 are 0 or 1, Δt1 is a temperature difference between the actual temperature of the first chamber 31 and the preset target temperature of the first chamber 31, Δt11 is a maximum value of a preset temperature difference range of Δt1, Δt2 is a temperature difference between the actual temperature of the second chamber 32 and the preset target temperature of the second chamber 32, Δt21 is a maximum value of a preset temperature difference range of Δt2, T1HMV is a heating output of the first chamber 31, T2HMV is a heating output of the second chamber 32, THMV is a preset heating output threshold value, Δrpm 1=min_r1_int (k1+1) +r2_int (k2+1) —Δt1, and K1 and K2 are coefficients. When r1=1 and r2=1, Δrpm1 is associated with Δt1 and Δt2, Δrpm 1=min [ -INT (k1×Δt1+1+k2×Δt2+1) |, 100]. When r1=1 and r2=1, if Δt1 is 2, Δt2 is 5, K1 and K2 are both 0.6, Δrpm 1=min [ -INT (6.2) |, 100], INT represents rounding, i.e. Δrpm1 is 6; if Δt1 is 100 and Δt2 is 200, Δrpm 1=min [ -INT (182) |, 100], i.e. Δrpm1 is 100, the unit may be r/s. That is, when both the first solenoid valve 41 and the second solenoid valve 42 are turned on, if Δt1 is equal to or greater than Δt11 or T1HMV is equal to or less than THMV or Δt2 is equal to or greater than Δt21 or T2HMV is equal to or less than THMV, the rotational speed of the inverter compressor 10 is controlled to be increased by a first preset rotational speed value Δrpm1.
And step 240, when r1=1 and r2=0, if Δt1 is greater than or equal to Δt11 or T1HMV is less than or equal to THMV, controlling the rotation speed of the variable frequency compressor to rise by a first preset rotation speed value Δrpm1.
Wherein r2=0 indicates that the second electromagnetic valve 42 is in an off state, that is, when the first electromagnetic valve 41 is in an on state and the second electromagnetic valve 42 is in an off state, if Δt1 is greater than or equal to Δt11 or T1HMV is less than or equal to THMV, the rotational speed of the inverter compressor 10 is controlled to increase by a first preset rotational speed value Δrpm1, at which time Δrpm 1=min [ -INT (k1×Δt1+1) [ -100 ]. The value corresponding to THMV, for example, 1.0%, may be 1.0% of the specific value of the set heating amount, and the specific value of the set heating amount may be set according to the actual situation, which is not limited herein.
And step 250, when r1=0 and r2=1, if Δt2 is greater than or equal to Δt21 or T2HMV is less than or equal to THMV, controlling the rotation speed of the variable frequency compressor to rise by a first preset rotation speed value Δrpm1.
Wherein r1=0 indicates that the first electromagnetic valve 41 is in an off state, that is, when the first electromagnetic valve 41 is in an off state and the second electromagnetic valve 42 is in an on state, if Δt2 is greater than or equal to Δt21 or T2HMV is less than or equal to THMV, at this time Δrpm 1=min [ -INT (k2×Δt2+1) —100], the rotational speed of the inverter compressor 10 is controlled to rise by a first preset rotational speed value Δrpm1.
In step 260, when r1=1 and r2=1, if T1HMV is equal to OR (t1hmv_l, t1hmv_h) and T2HMV is equal to OR (t2hmv_l, t2hmv_h), OR Δt1 is equal to OR less than OR equal to Δt12 and Δt2 is equal to OR less than OR equal to Δt22, the rotation speed of the inverter compressor is controlled to be reduced by a second preset rotation speed value Δrpm2.
Specifically, r1=1 indicates that the first solenoid valve 41 is in an on state, r2=1 indicates that the second solenoid valve 42 is in an on state, the values of r1 and r2 are 0 or 1, Δt1 is the temperature difference between the actual temperature of the first chamber 31 and the preset target temperature of the first chamber 31, Δt12 is the minimum value of the preset temperature difference range of Δt1, Δt2 is the temperature difference between the actual temperature of the second chamber 32 and the preset target temperature of the second chamber 32, Δt22 is the minimum value of the preset temperature difference range of Δt2, t1HMV, t1hmv_l and t1hmv_h are the heating output of the first chamber 31, the low target reference value and the high target reference value, and t2hmv_l and t2hmv_h are the heating output of the second chamber 32, the low target reference value and the high target reference value, respectively, and the value of t1hmv_l is smaller than the value of t1hmv_h, Δ1 hmv=Δ1_h, Δ1_r1_r1_r1_r1_r1=Δ1+Δ1+d1+d1_r1+d1_r1+d1. When r1=1 and r2=1, rd1 is related to Δt1 and T1HMV, rd 1= -INT [ (k3×Δt1×Δt1) -k4×Δt1HMV-1], rd 2= -INT [ (k3×Δt2×Δt2) -k4×t2HMV-1], and K3 and K4 are coefficients. When r1=1 and r2=1, if Δt1 is 0.2, Δt12 is-0.2, T1HMV is 10%, Δt2is 0.3, Δt22 is-0.2, T2HMV is 20%, K3 and K4 are 1000 and 20, respectively, then Rd 1= -INT (5) = -5, rd2= -INT (22) = -22, Δrpm 1=min [ -27 ] is 100], i.e. Δrpm1 is 27, the unit may be r/s. That is, when both the first solenoid valve 41 and the second solenoid valve 42 are turned on, if T1HMV is equal to OR (T1 HMV_L, T1 HMV_H) and T2HMV is equal to OR (T2 HMV_L, T2 HMV_H), OR DeltaT1 is equal to OR less than-0.2 and DeltaT2 is equal to OR less than-0.2, the rotation speed of the inverter compressor 10 is controlled to be reduced by a second preset rotation speed value Deltarpm 2.
In addition, T1HMV is equal to OR greater than OR (T1 HMV_L, T1 HMV_H) represents that T1HMV is equal to OR greater than T1HMV_L OR T1HMV is equal to OR greater than T1HMV_H, such as when T1 PV is equal to OR greater than T_dH (heating deviation discrimination temperature value, which may range from-40 ℃ to +45 ℃ with 10 ℃ default), it may be judged whether T1HMV is greater than OR equal to T1HMV_L (T1 HMV_L may range from 0 to 50% with 3% default); when T1_PV < T_dH, it can be determined whether T1HMV is greater than or equal to T1HMV_H (T1 HMV_H can range from 0 to 50%, default 10%); similarly, T2HMV ≡OR (T2 HMV_L, T2 HMV_H) means that T2HMV ≡T2HMV_L OR T2HMV ≡T2HMV_H, for example, when T2 PV ≡T_dH, it can be judged whether T2HMV is greater than OR equal to T2HMV_L (T2 HMV_L may range from 0 to 50%, default 3%); when T2_PV < T_dH, it may be determined whether T2HMV is greater than or equal to T2HMV_H (T2 HMV_H may range from 0 to 50%, 10% by default).
Step 270, when r1=1 and r2=0, if T1HMV is equal to OR (t1hmv_l, t1hmv_h) OR Δt1 is equal to OR less than Δt12, controlling the rotation speed of the inverter compressor to decrease by a second preset rotation speed value Δrpm2.
Where r2=0 indicates that the second electromagnetic valve 42 is in an off state, that is, when the first electromagnetic valve 41 is in an on state and the second electromagnetic valve 42 is in an off state, if T1HMV is equal to or greater than Δt1HMV or Δt1 </Δt12, the rotational speed of the inverter compressor 10 is controlled to drop by a second preset rotational speed value Δrpm2, where Δrpm2 = Min [ -INT [ (k3×Δt1×Δt1) -k4×t1HMV-1 ]. 60].
Step 280, when r1=0 and r2=1, if T2HMV is equal to OR (t2hmv_l, t2hmv_h) OR Δt2 is equal to OR less than Δt22, controlling the rotation speed of the inverter compressor to decrease by a second preset rotation speed value Δrpm2.
Where r1=0 indicates that the first solenoid valve 41 is in an off state, that is, when the first solenoid valve 41 is in an off state and the second solenoid valve 42 is in an on state, if T2HMV is equal to or greater than Δt2HMV or Δt2 </Δt22, the rotational speed of the inverter compressor 10 is controlled to drop by a second preset rotational speed value Δrpm2, where Δrpm2 = Min [ -INT [ (k3×Δt2×Δt2) -k4×t2HMV-1]. 60].
According to the variable frequency compressor control method of the refrigerating system, according to the temperature difference of the corresponding compartments of the electromagnetic valve in the on state or the heating output of the heater of the corresponding compartments, the rotating speed of the variable frequency compressor is controlled to rise by a first preset rotating speed value or fall by a second preset rotating speed value, so that when the load of at least one compartment is increased, the rotating speed of the compressor is controlled to fall or rise by the temperature difference of each compartment or the heating output of the heater of each compartment, and the actual rotating speed of the compressor is matched with the actual load, so that the energy consumption is reduced.
Example III
Fig. 4 is a block diagram of a control device for a variable frequency compressor of a refrigeration system according to a third embodiment of the present invention, where the device includes a data state obtaining module 310, a temperature difference determining module 320, a rotational speed first control module 330, and a rotational speed second control module 340; the data state obtaining module 310 is configured to obtain a switching state of each electromagnetic valve, an actual temperature of each compartment, and a heating output of a heater of each compartment in the refrigeration system; the compartments are in one-to-one correspondence with the electromagnetic valves, and the variable frequency compressors are communicated with the corresponding compartments through passages where the electromagnetic valves are positioned; the temperature difference determining module 320 is configured to determine a temperature difference between the actual temperature of each compartment and a corresponding preset target temperature according to the actual temperature of each compartment; the rotation speed first control module 330 is configured to control, when at least one solenoid valve is in a conducting state, the rotation speed of the inverter compressor to increase by a first preset rotation speed value if a temperature difference of a compartment corresponding to the solenoid valve in the conducting state exceeds a preset first temperature difference threshold, or a heating output of a heater of a corresponding compartment is lower than a preset heating output threshold; the rotation speed second control module 340 is configured to control the rotation speed of the inverter compressor to decrease by a second preset rotation speed value if the temperature difference of the compartment corresponding to the solenoid valve in the on state is lower than a preset second temperature difference threshold value or the heating output of the heater of the compartment corresponding to the solenoid valve is higher than a preset target reference value when the at least one solenoid valve is in the on state.
On the basis of the embodiment, the electromagnetic valve comprises a first electromagnetic valve and a second electromagnetic valve, the compartments comprise a first compartment and a second compartment, and the variable-frequency compressor is connected with the evaporator of the first compartment through a passage in which the first electromagnetic valve is positioned and is connected with the evaporator of the second compartment through a passage in which the second electromagnetic valve is positioned; the rotation speed first control module 330 includes a rotation speed first control unit, where the rotation speed first control unit is configured to control the rotation speed of the inverter compressor to rise by a first preset rotation speed value Δrpm1 if Δt1 is greater than or equal to Δt11 or T1HMV is greater than or equal to THMV or Δt2 is greater than or equal to Δt21 or T2HMV is greater than or equal to THMV when r1=1 and r2=1; 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, values of r1 and r2 are 0 or 1, Δt1 is a temperature difference between an actual temperature of the first chamber and a preset target temperature of the first chamber, Δt11 is a maximum value of a preset temperature difference range of Δt1, Δt2 is a temperature difference between an actual temperature of the second chamber and a preset target temperature of the second chamber, Δt21 is a maximum value of a preset temperature difference range of Δt2, T1HMV is a heating output of the first chamber, T2HMV is a heating output of the second chamber, THMV is a preset heating output threshold value, Δrpm 1=min [. Cndot.r 1×int (k1×Δt1) +r2×Δt2+1) ×int (k2×Δt2+1) ×l, 100, and K1 and K2 are coefficients.
Preferably, the first rotational speed control module 330 includes a second rotational speed control unit, where the second rotational speed control unit is configured to control the rotational speed of the variable frequency compressor to increase by a first preset rotational speed value Δrpm1 if Δt1 is greater than or equal to Δt11 or T1HMV is less than or equal to THMV when r1=1 and r2=0; where r2=0 indicates that the second solenoid valve is in an open state.
Preferably, the rotation speed first control module 330 includes a rotation speed third control unit, where the rotation speed third control unit is configured to control the rotation speed of the inverter compressor to rise by a first preset rotation speed value Δrpm1 if Δt2 is greater than or equal to Δt21 or T2HMV is less than or equal to THMV when r1=0 and r2=1; where r1=0 indicates that the first solenoid valve is in an open state.
In one embodiment, the solenoid valve comprises a first solenoid valve and a second solenoid valve, the compartments comprise a first compartment and a second compartment, and the variable frequency compressor is connected with the evaporator of the first compartment through a passage in which the first solenoid valve is located and with the evaporator of the second compartment through a passage in which the second solenoid valve is located; the rotation speed second control module 340 includes a rotation speed fourth control unit, which is configured to control the rotation speed of the inverter compressor to decrease by a second preset rotation speed value Δrpm2 if T1HMV is greater than OR equal to OR (T1 hmv_l, T1 hmv_h) and T2HMV is greater than OR equal to OR (T2 hmv_l, T2 hmv_h), OR Δt1 is less than OR equal to Δt12 and Δt2 is less than OR equal to Δt22, when r1=1 and r2=1; 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, the values of r1 and r2 are 0 or 1, Δt1 is a temperature difference between an actual temperature of the first chamber and a preset target temperature of the first chamber, Δt12 is a minimum value of a preset temperature difference range of Δt1, Δt2 is a temperature difference between an actual temperature of the second chamber and the preset target temperature, Δt22 is a minimum value of a preset temperature difference range of Δt2, t1HMV, t1hmv_l, and t1hmv_h are the heating output of the first compartment, the low target reference value, and the high target reference value, respectively, T2HMV, T2hmv_l, and T2hmv_h are the heating output of the second compartment, the low target reference value, and the high target reference value, respectively, Δrpm2 = Min [ -Rd 1+ Rd2, 60], T1hmv_l is less than T1hmv_h, rd1 = -r1 INT [ (K3 × Δt1) -K4 × T1HMV-1], rd2 = -r2 × Δt2 [ (K3 × Δt2 ] HMV-1], and K3 and K4 are coefficients, respectively.
Preferably, the rotation speed second control module 340 includes a rotation speed fifth control unit, where the rotation speed fifth control unit is configured to control the rotation speed of the inverter compressor to drop by a second preset rotation speed value Δrpm2 if T1HMV is equal to OR (t1hmv_l, t1hmv_h) OR Δt1 is equal to OR less than Δt12 when r1=1 and r2=0; where r2=0 indicates that the second solenoid valve is in an open state.
Preferably, the rotation speed second control module 340 includes a rotation speed sixth control unit, where the rotation speed sixth control unit is configured to control the rotation speed of the inverter compressor to drop by a second preset rotation speed value Δrpm2 if T2HMV is equal to OR (t2hmv_l, t2hmv_h) OR Δt2 is equal to OR less than Δt22 when r1=0 and r2=1; where r1=0 indicates that the first solenoid valve is in an open state.
The variable frequency compressor control device of the refrigeration system provided by the embodiment and the variable frequency compressor control method of the refrigeration system provided by any embodiment of the invention belong to the same invention conception, have corresponding beneficial effects, and the technical details not elaborated in the embodiment are detailed in the variable frequency compressor control method of the refrigeration system provided by any embodiment of the invention.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements, combinations, and substitutions can be made by those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.

Claims (4)

1. A method of controlling a variable frequency compressor of a refrigeration system, comprising:
acquiring the switching state of each electromagnetic valve, the actual temperature of each compartment and the heating output quantity of a heater of each compartment in the refrigerating system; the compartments are in one-to-one correspondence with the electromagnetic valves, and the variable frequency compressors are communicated with the corresponding compartments through passages where the electromagnetic valves are positioned; the electromagnetic valve comprises a first electromagnetic valve and a second electromagnetic valve, the compartments comprise a first compartment and a second compartment, and the variable-frequency compressor is connected with the evaporator of the first compartment through a passage where the first electromagnetic valve is located and is connected with the evaporator of the second compartment through a passage where the second electromagnetic valve is 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;
when at least one electromagnetic valve is in a conducting state, if the temperature difference of a corresponding compartment of the electromagnetic valve in the conducting state is lower than a preset second temperature difference threshold value or the heating output of a heater of the corresponding compartment is higher than a preset target reference value, controlling the rotating speed of the variable-frequency compressor to be reduced by a second preset rotating speed value;
when at least one electromagnetic valve is in a conducting state, if the temperature difference of the corresponding chamber of the electromagnetic valve in the conducting state is lower than a preset second temperature difference threshold value, or the heating output of the heater of the corresponding chamber is higher than a preset target reference value, controlling the rotating speed of the variable frequency compressor to be reduced by a second preset rotating speed value, including:
when r1=1 and r2=1, if T1HMV is equal to OR (t1hmv_l, t1hmv_h) and T2HMV is equal to OR (t2hmv_l, t2hmv_h), OR Δt1 is equal to OR less than Δt12 and Δt2 is equal to OR less than Δt22, controlling the rotation speed of the inverter compressor to decrease by a second preset rotation speed value Δrpm2; wherein r1=1 indicates that the first electromagnetic valve is in a conducting state, r2=1 indicates that the second electromagnetic valve is in a conducting state, r1 and r2 have values of 0 or 1, Δt1 is a temperature difference between an actual temperature of the first chamber and a preset target temperature of the first chamber, Δt12 is a minimum value of a preset temperature difference range of Δt1, Δt2 is a temperature difference between an actual temperature of the second chamber and a preset target temperature of the second chamber, Δt22 is a minimum value of a preset temperature difference range of Δt2, t1HMV, t1hmv_l, and t1hmv_h are the heating output, the low target reference value, and the high target reference value of the first compartment, respectively, T2HMV, T2hmv_l, and T2hmv_h are the heating output, the low target reference value, and the high target reference value of the second compartment, respectively, Δrpm2 = Min [ -Rd 1+ Rd 2-, 60], rd1 = -r1 [ -INT [ (K3 = - Δt1 # ] -T1 # -T1 HMV-1), rd2 = -r2 [ -K3 # -T2 # ] T2 #, K3, and K4 are coefficients;
or alternatively, the first and second heat exchangers may be,
when r1=1 and r2=0, if T1HMV is equal to OR (t1hmv_l, t1hmv_h) OR Δt1 is equal to OR less than Δt12, controlling the rotation speed of the inverter compressor to be reduced by a second preset rotation speed value Δrpm2; wherein r2=0 indicates that the second solenoid valve is in an open state;
or alternatively, the first and second heat exchangers may be,
when r1=0 and r2=1, if T2HMV is equal to OR (T2 hmv_l, T2 hmv_h) OR Δt2 is equal to OR less than Δt22, controlling the rotation speed of the inverter compressor to be reduced by a second preset rotation speed value Δrpm2; wherein r1=0 indicates that the first solenoid valve is in an open state.
2. A variable frequency compressor control apparatus of a refrigeration system, comprising:
the data state acquisition module is used for acquiring the switching state of each electromagnetic valve, the actual temperature of each compartment and the heating output quantity of the heater of each compartment in the refrigerating system; the compartments are in one-to-one correspondence with the electromagnetic valves, and the variable frequency compressors are communicated with the corresponding compartments through passages where the electromagnetic valves are positioned; the electromagnetic valve comprises a first electromagnetic valve and a second electromagnetic valve, the compartments comprise a first compartment and a second compartment, and the variable-frequency compressor is connected with the evaporator of the first compartment through a passage where the first electromagnetic valve is located and is connected with the evaporator of the second compartment through a passage where the second electromagnetic valve is 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;
the rotating speed second control module is used for controlling the rotating speed of the variable-frequency compressor to be reduced by a second preset rotating speed value if the temperature difference of the corresponding compartment of the electromagnetic valve in the on state is lower than a preset second temperature difference threshold value or the heating output of the heater of the corresponding compartment is higher than a preset target reference value when at least one electromagnetic valve is in the on state; the rotation speed second control module is specifically configured to control the rotation speed of the variable frequency compressor to decrease by a second preset rotation speed value Δrpm2 if T1HMV is greater than OR equal to OR (t1hmv_l, t1hmv_h) and T2HMV is greater than OR equal to OR (t2hmv_l, t2hmv_h), OR Δt1 is less than OR equal to Δt12 and Δt2 is less than OR equal to Δt22 when r1=1 and r2=1; wherein r1=1 indicates that the first electromagnetic valve is in a conducting state, r2=1 indicates that the second electromagnetic valve is in a conducting state, r1 and r2 have values of 0 or 1, Δt1 is a temperature difference between an actual temperature of the first chamber and a preset target temperature of the first chamber, Δt12 is a minimum value of a preset temperature difference range of Δt1, Δt2 is a temperature difference between an actual temperature of the second chamber and a preset target temperature of the second chamber, Δt22 is a minimum value of a preset temperature difference range of Δt2, t1HMV, t1hmv_l, and t1hmv_h are the heating output, the low target reference value, and the high target reference value of the first compartment, respectively, T2HMV, T2hmv_l, and T2hmv_h are the heating output, the low target reference value, and the high target reference value of the second compartment, respectively, Δrpm2 = Min [ -Rd 1+ Rd 2-, 60], rd1 = -r1 [ -INT [ (K3 = - Δt1 # ] -T1 # -T1 HMV-1), rd2 = -r2 [ -K3 # -T2 # ] T2 #, K3, and K4 are coefficients; OR when r1=1 and r2=0, if T1HMV is equal to OR (t1hmv_l, t1hmv_h) OR Δt1 is equal to OR less than Δt12, controlling the rotation speed of the inverter compressor to be reduced by a second preset rotation speed value Δrpm2; wherein r2=0 indicates that the second solenoid valve is in an open state; OR when r1=0 and r2=1, if T2HMV is equal to OR (t2hmv_l, t2hmv_h) OR Δt2 is equal to OR less than Δt22, controlling the rotation speed of the inverter compressor to be reduced by a second preset rotation speed value Δrpm2; wherein r1=0 indicates that the first solenoid valve is in an open state.
3. A refrigeration system, comprising: the variable frequency compressor, the controller, at least two compartments and at least two electromagnetic valves corresponding to the at least two compartments one by one, wherein the variable frequency compressor control device of the refrigeration system as claimed in claim 2 is integrated in the controller; the variable frequency compressor is electrically connected with the controller, and the variable frequency compressor is connected with the evaporator of the corresponding compartment through a passage where the electromagnetic valve is located.
4. A refrigeration system as set forth in claim 3 wherein said compartment includes a temperature sensor, an evaporator and a heater, said temperature sensor, said evaporator and said heater each being electrically connected to said controller.
CN202210508797.0A 2020-12-28 2020-12-28 Variable frequency compressor control method and device of refrigeration system and refrigeration system Active CN114877576B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210508797.0A CN114877576B (en) 2020-12-28 2020-12-28 Variable frequency compressor control method and device of refrigeration system and refrigeration system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202210508797.0A CN114877576B (en) 2020-12-28 2020-12-28 Variable frequency compressor control method and device of refrigeration system and refrigeration system
CN202011597000.6A CN112665251B (en) 2020-12-28 2020-12-28 Control method and device for variable-frequency compressor of refrigerating system and refrigerating system

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CN202011597000.6A Division CN112665251B (en) 2020-12-28 2020-12-28 Control method and device for variable-frequency compressor of refrigerating system and refrigerating system

Publications (2)

Publication Number Publication Date
CN114877576A CN114877576A (en) 2022-08-09
CN114877576B true CN114877576B (en) 2024-01-02

Family

ID=75410301

Family Applications (2)

Application Number Title Priority Date Filing Date
CN202210508797.0A Active CN114877576B (en) 2020-12-28 2020-12-28 Variable frequency compressor control method and device of refrigeration system and refrigeration system
CN202011597000.6A Active CN112665251B (en) 2020-12-28 2020-12-28 Control method and device for variable-frequency compressor of refrigerating system and refrigerating system

Family Applications After (1)

Application Number Title Priority Date Filing Date
CN202011597000.6A Active CN112665251B (en) 2020-12-28 2020-12-28 Control method and device for variable-frequency compressor of refrigerating system and refrigerating system

Country Status (1)

Country Link
CN (2) CN114877576B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115717805B (en) * 2022-11-18 2023-11-07 江苏拓米洛高端装备股份有限公司 Control method and device of refrigerating system and refrigerating system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106247737A (en) * 2016-09-08 2016-12-21 江苏白雪电器股份有限公司 Double temperature double control refrigeration system and double between room refrigerator and control method thereof
CN106907874A (en) * 2017-02-28 2017-06-30 海信（山东）冰箱有限公司 A kind of control method of refrigerator and its refrigeration system
CN111071798A (en) * 2018-10-19 2020-04-28 伸和控制工业股份有限公司 Air conditioner and floating type conveying unit for substrate with air conditioner
CN111854281A (en) * 2019-04-24 2020-10-30 夏普株式会社 Refrigerator with a door

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02161262A (en) * 1988-12-14 1990-06-21 Sharp Corp Multi-room air conditioning apparatus
JP3818286B2 (en) * 2003-10-09 2006-09-06 松下電器産業株式会社 Heating system and vending machine
CN108302864A (en) * 2018-01-23 2018-07-20 海信（山东）冰箱有限公司 A kind of multi-cycle refrigeration system and its method for diagnosing faults
CN109855256B (en) * 2019-02-22 2021-03-16 广东欧科空调制冷有限公司 Air conditioning system evaporation temperature control method and device and air conditioning system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106247737A (en) * 2016-09-08 2016-12-21 江苏白雪电器股份有限公司 Double temperature double control refrigeration system and double between room refrigerator and control method thereof
CN106907874A (en) * 2017-02-28 2017-06-30 海信（山东）冰箱有限公司 A kind of control method of refrigerator and its refrigeration system
CN111071798A (en) * 2018-10-19 2020-04-28 伸和控制工业股份有限公司 Air conditioner and floating type conveying unit for substrate with air conditioner
CN111854281A (en) * 2019-04-24 2020-10-30 夏普株式会社 Refrigerator with a door

Also Published As

Publication number Publication date
CN112665251A (en) 2021-04-16
CN112665251B (en) 2022-06-17
CN114877576A (en) 2022-08-09

Similar Documents

Publication Publication Date Title
US20170241690A1 (en) Compressor Capacity Modulation System For Multiple Compressors
US20090324428A1 (en) System and method for detecting a fault condition in a compressor
MX2013009487A (en) Cascade floating intermediate temperature heat pump system.
CN104653444A (en) Method and device for controlling starting of variable-frequency air conditioner
CN105333563A (en) Refrigeration control method and device and air conditioner
CN110319541B (en) Unloading adjustment control method of large-displacement variable-frequency multi-split system
JP2010078272A (en) Air-conditioning and refrigerating system
CN106839640A (en) The control method of double refrigeration system refrigerators, control device and double refrigeration system refrigerators
CN114877576B (en) Variable frequency compressor control method and device of refrigeration system and refrigeration system
CN110195920A (en) A kind of heat-exchange system and its control method and air conditioner
CN110617206B (en) Exhaust control method and device for two-stage compressor, controller and air conditioner
CN210900104U (en) Miniature data center
CN108224823A (en) Full load air-conditioning device and its control method
Binneberg et al. Reduction in power consumption of household refrigerators by using variable speed compressors
CN108800467A (en) Control method, device and the air-conditioning with it of air-conditioning
CN112665255A (en) Multi-compartment top layer mode control method and device for refrigeration system and refrigeration system
CN114779858B (en) Method, device, equipment and storage medium for starting sample analysis device
CN103759395A (en) Adjusting system adapting to working condition changes of air conditioner
US10551105B2 (en) Multi-stage control for electromechanical heating, ventilation, and air conditioning (HVAC) unit
CN114811892A (en) Variable frequency air conditioner and control method and control device thereof
CN111854201B (en) Refrigerator equipment, refrigerating system and control method of refrigerating system
CN114136033A (en) Natural cooling system working mode switching method and system and natural cooling system
CN114183884A (en) Double-module refrigerating system, air conditioner and control method of air conditioner
CN113446670A (en) Method for controlling running frequency of compressor
CN110542229A (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
CB02 Change of applicant information

Address after: 215300 plants A6, a7, a8 and B10, No. 8, Huacheng Road, Lujia Town, Kunshan City, Suzhou City, Jiangsu Province

Applicant after: Jiangsu Tuomiluo High-end Equipment Co.,Ltd.

Address before: 215300 plants A6, a7, a8 and B10, No. 8, Huacheng Road, Lujia Town, Kunshan City, Suzhou City, Jiangsu Province

Applicant before: JIANGSU TOLIMO ENVIRONMENT TESTING EQUIPMENT Co.,Ltd.

CB02 Change of applicant information
GR01 Patent grant
GR01 Patent grant