CN116379660A - Control method of refrigerating system and refrigerating system - Google Patents

Control method of refrigerating system and refrigerating system Download PDF

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Publication number
CN116379660A
CN116379660A CN202310504712.6A CN202310504712A CN116379660A CN 116379660 A CN116379660 A CN 116379660A CN 202310504712 A CN202310504712 A CN 202310504712A CN 116379660 A CN116379660 A CN 116379660A
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China
Prior art keywords
compressor
refrigeration
temperature
control method
controlling
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Pending
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CN202310504712.6A
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Chinese (zh)
Inventor
杨存杰
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Jiangsu Tuomiluo High End Equipment Co ltd
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Jiangsu Tuomiluo High End Equipment Co ltd
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Priority to CN202310504712.6A priority Critical patent/CN116379660A/en
Publication of CN116379660A publication Critical patent/CN116379660A/en
Pending legal-status Critical Current

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    • 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
    • F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/07—Details of compressors or related parts
    • F25B2400/077—Compressor control units, e.g. terminal boxes, mounted on the compressor casing wall containing for example starter, protection switches or connector contacts
    • 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 control method of a refrigeration system and the refrigeration system, wherein the method comprises the steps of receiving a refrigeration control instruction and controlling a first compressor to perform refrigeration work on a target object based on the refrigeration control instruction; judging whether the valve step of an electronic expansion valve of the refrigeration system is contracted to a preset expansion valve step value or not; if yes, the first compressor is turned off, and the second compressor is started to maintain the current refrigeration temperature of the target object. According to the method and the device, the high-power compressor is controlled to refrigerate by using the temperature deviation, the temperature is kept constant when the low-power compressor is started according to the valve step of the electronic expansion valve, the technical problem that the temperature is too high or the process phenomenon easily occurs due to the fact that the set temperature value is simply used for switching the high-low-power compressor in the prior art is solved, and the technical effects that the temperature is too high or the process phenomenon can be avoided, the temperature is too high, and energy is saved are achieved.

Description

Control method of refrigerating system and refrigerating system
Technical Field
The embodiment of the invention relates to the technical field of refrigeration systems, in particular to a control method of a refrigeration system and the refrigeration system.
Background
For the large and small compressors of the refrigerating system of the environmental test equipment, the existing switching condition is that IS (inner signal) signals are used, when the temperature of the large compressor is reduced, the small compressor is started after the temperature reaches a set value, the large compressor is normally closed for 600s in a set delay, and the small compressor is directly started to maintain the constant temperature after the temperature reaches the set temperature in a temperature raising stage.
In the cooling stage, particularly when the load is large, two problems are easy to occur in the switching mode, and the problem of overlarge temperature return occurs. When the load stores a large amount of heat, the small compressor is started after the temperature reaches a set value, the large compressor is turned off for 600 seconds after the time delay, and the large compressor is turned off after 600 seconds, the refrigerating capacity output by the small compressor is far lower than the heat released by the interior of the load, and at the moment, the temperature returning phenomenon can occur or the condition that the temperature of the small compressor is not reduced to the set value for a long time after the temperature returning is performed; another is the problem of overshoot. When the load is small, because it is not a requirement for controlled refrigeration; when the temperature reaches, the large compressor is operated for 600S with minimum valve step delay, the cold energy is continuously supplied, the box temperature is continuously reduced, the actual temperature is lower than the set temperature, the phenomenon is called temperature overshoot, when the overshoot problem occurs, the PID (proportion-integral-derivative) adjustment electric heating output is increased, the power consumption is increased, the large compressor is closed after 600S is reached, the PID readjusts the refrigerating output and the heating output after the small compressor is switched to operate, a new balance is achieved, and a small temperature return phenomenon occurs in the adjustment process.
Disclosure of Invention
The embodiment of the invention provides a control method of a refrigerating system and the refrigerating system, which solve the technical problem that the temperature return is overlarge or the process phenomenon is easy to occur caused by simply using a set temperature value to switch a large compressor and a small compressor in the prior art.
The embodiment of the invention provides a control method of a refrigerating system, which comprises a first compressor, a second compressor, two evaporators, two condensers and two electronic expansion valves, wherein the power of the first compressor is higher than that of the second compressor, and the first compressor and the second compressor are respectively connected with one condenser, one electronic expansion valve and one evaporator in sequence; the control method comprises the following steps:
receiving a refrigeration control instruction, and controlling the first compressor to perform refrigeration on a target object based on the refrigeration control instruction;
judging whether the valve step of an electronic expansion valve of the refrigeration system is contracted to a preset expansion valve step value or not;
if yes, the first compressor is turned off, and the second compressor is started to maintain the current refrigeration temperature of the target object.
Further, controlling the first compressor to perform a cooling operation based on the cooling control instruction includes:
judging whether the current temperature value of the target object is larger than a preset temperature threshold value or not;
if yes, controlling the first compressor to work by a proportional-integral-derivative control method based on the refrigeration control instruction by utilizing a temperature deviation, wherein the temperature deviation is the difference value between the current temperature value of the target object and the preset temperature threshold value;
and if not, controlling the first compressor to work by utilizing the temperature deviation and the superheat degree of the refrigerating system.
Further, based on the refrigeration control command, controlling the operation of the first compressor by a proportional-integral-derivative control method using a temperature deviation includes:
acquiring a target refrigeration temperature in the refrigeration control instruction;
and calculating by the proportional-integral-derivative control method based on the target refrigeration temperature and the temperature deviation to obtain the corresponding expansion valve step and the refrigeration capacity of the first compressor.
Further, controlling the operation of the first compressor using the temperature deviation and the superheat of the refrigeration system together includes:
acquiring the superheat degree of a refrigerant in the refrigeration system;
determining a valve step reduction speed of an electronic expansion valve based on the superheat degree, wherein the electronic expansion valve is an electronic expansion valve connected with the first compressor;
and controlling the valve step contraction of the electronic expansion valve based on the valve step contraction speed, and simultaneously controlling the first compressor to work by a proportional-integral-derivative control method by utilizing the temperature deviation.
Further, the control method further includes:
and in the working process of the second compressor, if the refrigeration control instruction is received again, closing the second compressor, and restarting the first compressor to perform refrigeration work based on the refrigeration control instruction.
Further, before controlling the operation of the first compressor by a proportional-integral-derivative control method using a temperature deviation based on the cooling control command, the control method further includes:
and calculating the temperature deviation between the current temperature value and the preset temperature threshold value.
Further, the refrigerating output range of the first compressor is 5-7HP, and the refrigerating output range of the second compressor is 2-3HP.
Further, the refrigerating capacity of the first compressor is 6HP, and the refrigerating capacity of the second compressor is 2HP.
The embodiment of the invention also provides a refrigerating system, which is characterized in that the refrigerating system executes the control method of the refrigerating system in any embodiment; the refrigerating system comprises a first compressor and a second compressor, the power of the first compressor is larger than that of the second compressor, the refrigerating system further comprises two evaporators, two condensers and two electronic expansion valves, and the first compressor and the second compressor are respectively connected with one condenser, one electronic expansion valve and one evaporator in sequence.
The embodiment of the invention discloses a control method of a refrigeration system and the refrigeration system, wherein the method comprises the steps of receiving a refrigeration control instruction and controlling a first compressor to perform refrigeration work on a target object based on the refrigeration control instruction; judging whether the valve step of an electronic expansion valve of the refrigeration system is contracted to a preset expansion valve step value or not; if yes, the first compressor is turned off, and the second compressor is started to maintain the current refrigeration temperature of the target object. According to the method and the device, the high-power compressor is controlled to refrigerate by using the temperature deviation, the temperature is kept constant when the low-power compressor is started according to the valve step of the electronic expansion valve, the technical problem that the temperature is too high or the process phenomenon easily occurs due to the fact that the set temperature value is simply used for switching the high-low-power compressor in the prior art is solved, and the technical effects that the temperature is too high or the process phenomenon can be avoided, the temperature is too high, and energy is saved are achieved.
Drawings
Fig. 1 is a block diagram of a refrigeration system according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method of controlling a refrigeration system according to an embodiment of the invention;
fig. 3 is a flowchart of another control method of a refrigeration system according to an embodiment of the 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.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and in the drawings are used for distinguishing between different objects and not for limiting a particular order. The following embodiments of the present invention may be implemented individually or in combination with each other, and the embodiments of the present invention are not limited thereto.
Fig. 1 is a block diagram of a refrigeration system according to an embodiment of the present invention. As shown in fig. 1, the refrigeration system includes a first compressor 10 and a second compressor 20, the first compressor 10 has a higher power than the second compressor 20, and the refrigeration system further includes two evaporators 30, two condensers 40 and two electronic expansion valves 50, and the first compressor 10 and the second compressor 20 are connected to one condenser 40, one electronic expansion valve 50 and one evaporator 30, respectively, in sequence. As shown in fig. 1, the two evaporators 30 are arranged together, but do not interfere with each other during operation, and the two condensers 40 are also arranged together, and do not interfere with each other during operation.
Fig. 2 is a flowchart of a control method of a refrigeration system according to an embodiment of the present invention.
As shown in fig. 2, the control method of the refrigeration system specifically includes the following steps:
s101, receiving a refrigeration control instruction, and controlling the first compressor to perform refrigeration operation on a target object based on the refrigeration control instruction.
Specifically, in the working process of the refrigeration system, a user can send a refrigeration control instruction to the refrigeration system through the man-machine interaction module so as to set the target refrigeration temperature of the refrigeration system. After receiving the refrigeration control instruction, the refrigeration system controls the high-power first compressor to cool the target object based on the target instruction temperature in the instruction. In the embodiment of the invention, the target object may be the internal environment of the test box, the temperature of the internal environment of the test box is adjusted by using the refrigerating system, or other environments requiring refrigeration by using a compressor, which is not limited herein.
S102, judging whether the valve step of an electronic expansion valve of the refrigeration system is contracted to a preset expansion valve step value.
Specifically, in the process of cooling the target object by the first compressor, when the temperature gradually decreases, the temperature of the target object gradually approaches to a preset temperature threshold, at this time, the demand of the refrigerating capacity decreases, the valve step of the electronic expansion valve gradually contracts correspondingly, the valve step of the electronic expansion valve is detected in real time, and whether the valve step of the electronic expansion valve contracts to the preset valve step value of the expansion valve is judged, so as to judge whether the second compressor with low power needs to be started to work.
And S103, if so, turning off the first compressor, and starting the second compressor to maintain the current refrigeration temperature of the target object.
Specifically, if the judgment result is that the valve step of the electronic expansion valve is contracted to the preset expansion valve step value, for example, the preset expansion valve step value is set to 75step, when the valve step of the electronic expansion valve is smaller than 75step, the operation of the second compressor is switched to start the temperature constant mode, the purpose of saving energy is achieved, and the valve step of the electronic expansion valve is used as a switching basis, so that a more stable entering constant stage can be realized. Otherwise, if the judgment result is that the valve step of the electronic expansion valve is not contracted to the preset expansion valve step value, the first compressor is continuously used for refrigerating.
According to the method and the device, the high-power compressor is controlled to refrigerate by using the temperature deviation, the temperature is kept constant when the low-power compressor is started according to the valve step of the electronic expansion valve, the technical problem that the temperature is too high or the overshoot phenomenon easily occurs due to the fact that the temperature value is simply set to switch the high-power compressor and the low-power compressor in the prior art is solved, and the technical effects that the temperature is too high or the overshoot phenomenon can be avoided, and energy is saved are achieved.
On the basis of the above technical solutions, fig. 3 is a flowchart of another control method of a refrigeration system according to an embodiment of the present invention, as shown in fig. 3, S101, controlling a first compressor to perform refrigeration based on a refrigeration control instruction, specifically includes the following steps:
s301, judging whether the current temperature value of the target object is larger than a preset temperature threshold value.
Specifically, in the working process of the refrigeration system, the current temperature value of the target object is required to be acquired first, and then the current temperature value is compared with a preset temperature threshold value, so that whether the target object is in a high-temperature section or a low-temperature section currently is judged, and whether the participation of the superheat degree is required in the working process of the refrigeration system is determined.
And S302, if so, controlling the first compressor to work by using a proportional-integral-derivative control method based on the refrigeration control instruction and utilizing the temperature deviation, wherein the temperature deviation is the difference value between the current temperature value of the target object and the preset temperature threshold value.
Specifically, if the current temperature value is higher than the preset temperature threshold value, indicating that it is in a high temperature section at this time, the first compressor is controlled by a PID (proportional-integral-derivative) control method using the temperature deviation. Specifically, the temperature deviation is used as an input amount of PID control, and the cooling capacity of the first compressor is outputted by PID control based on the total cooling demand of the target object.
Optionally, at S302, before controlling the operation of the first compressor by the proportional-integral-derivative control method using the temperature deviation based on the refrigeration control command, the control method further includes: and calculating the temperature deviation between the current temperature value and the preset temperature threshold value.
Specifically, in order to meet the subsequent control requirement of the refrigeration system, after comparing the current temperature value with the preset temperature threshold value, the current temperature value and the preset temperature threshold value need to be subjected to difference to obtain the temperature deviation between the current temperature value and the preset temperature threshold value for standby.
And S303, if not, controlling the first compressor to work by utilizing the temperature deviation and the superheat degree of the refrigerating system.
Specifically, if the current temperature value is lower than the preset temperature threshold value, it indicates that the temperature is in a low temperature section at this time, and the first compressor needs to be controlled by utilizing the superheat degree of the refrigeration system in addition to the temperature deviation and the PID control, where the superheat degree refers to the difference between the superheat temperature and the saturation temperature of the refrigerant under the same evaporation pressure.
Optionally, S302 specifically includes:
acquiring a target refrigeration temperature in a refrigeration control instruction;
and calculating by a proportional-integral-derivative control method based on the target refrigeration temperature and the temperature deviation to obtain the corresponding expansion valve step and the refrigeration capacity of the first compressor.
Specifically, after a refrigeration control instruction is received, a target refrigeration temperature carried in the refrigeration control instruction is obtained, then a refrigeration demand is determined based on the target refrigeration temperature, and finally a valve step of the electronic expansion valve and the refrigeration capacity required to be output by the first compressor are obtained through calculation of the refrigeration demand and the temperature deviation.
Optionally, S303 specifically includes:
acquiring the superheat degree of a refrigerant in a refrigeration system;
determining a valve step reduction speed of an electronic expansion valve based on the superheat degree, wherein the electronic expansion valve is an electronic expansion valve connected with a first compressor;
the valve step contraction of the electronic expansion valve is controlled based on the valve step contraction speed, and the first compressor is controlled to operate by a proportional-integral-derivative control method by utilizing the temperature deviation.
Specifically, if the current temperature value is lower than the preset temperature threshold value, the current temperature value is in a low temperature section at the moment, the superheat degree of the refrigerant in the refrigeration system is required to be obtained, specifically, a pressure transmitter exists between an evaporator and a compressor in the refrigeration system, a pressure signal generated by the pressure transmitter can be correspondingly converted into the evaporation temperature of the refrigeration system in a saturated state, a temperature sensor also exists at the outlet of the evaporator, and the difference value between the temperature value detected by the temperature sensor and the evaporation temperature is the superheat degree of the refrigerant.
After the superheat degree of the refrigerant is obtained, the superheat degree is compared with a preset superheat degree threshold value, and the valve step reduction speed of the electronic expansion valve is determined according to the comparison result, so that the valve step reduction speed is utilized to control the valve step shrinkage of the electronic expansion valve, and meanwhile, the temperature deviation is utilized to control the first compressor to work through a proportional-integral-differential control method. The electronic expansion valve is an electronic expansion valve connected to the first compressor.
Optionally, the control method of the refrigeration system further includes:
and when the second compressor receives the refrigeration control instruction again in the working process of the second compressor, the second compressor is turned off, and the first compressor is restarted to perform refrigeration based on the refrigeration control instruction.
Specifically, in the constant-temperature refrigeration process of the second compressor, if the user sends refrigeration control refrigeration to the refrigeration system again through the man-machine interaction module, the second compressor with low power is controlled to be closed, and the first compressor with high power is started to execute refrigeration action on the target object based on the refrigeration control instruction.
Optionally, the refrigerating output range of the first compressor is 5-7HP, and the refrigerating output range of the second compressor is 2-3HP.
Specifically, in order to realize a high-power cooling and low-power constant-temperature refrigeration mode, so as to realize an energy-saving effect, the power of the first compressor and the power of the second compressor need to be set to different machine types, generally, the first compressor can be set, the refrigerating capacity range of the first compressor is 5-7HP, and the refrigerating capacity range of the second compressor is 2-3HP.
Preferably, the refrigerating capacity of the first compressor is 6HP, and the refrigerating capacity of the second compressor is 2HP.
By way of example, the first compressor may be set to have a cooling capacity of 6HP and the second compressor may be set to have a cooling capacity of 2HP, wherein 1HP means that the cooling capacity of the compressor is 2500w and 6HP means that the cooling capacity of the compressor is 15kw.
The embodiment of the invention also provides a refrigerating system, and the refrigerating system executes the control method of the refrigerating system in any embodiment; as shown in fig. 1, the refrigeration system includes a first compressor 10 and a second compressor 20, the first compressor 10 has a higher power than the second compressor 20, and further includes two evaporators 30, two condensers 40 and two electronic expansion valves 50, and the first compressor 10 and the second compressor 20 are connected to one condenser 40, one electronic expansion valve 50 and one evaporator 30, respectively, in sequence.
The refrigerating system provided by the embodiment of the invention uses the control method of the refrigerating system in the above embodiment, so the refrigerating system provided by the embodiment of the invention also has the beneficial effects described in the above embodiment, and is not repeated here.
In the description of embodiments of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Finally, it should be noted that the foregoing description 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 changes, rearrangements and substitutions as will now become apparent to 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 (9)

1. The control method of the refrigerating system is characterized in that the refrigerating system comprises a first compressor and a second compressor, the power of the first compressor is larger than that of the second compressor, the refrigerating system further comprises two evaporators, two condensers and two electronic expansion valves, and the first compressor and the second compressor are respectively connected with one condenser, one electronic expansion valve and one evaporator in sequence; the control method comprises the following steps:
receiving a refrigeration control instruction, and controlling the first compressor to perform refrigeration on a target object based on the refrigeration control instruction;
judging whether the valve step of an electronic expansion valve of the refrigeration system is contracted to a preset expansion valve step value or not;
if yes, the first compressor is turned off, and the second compressor is started to maintain the current refrigeration temperature of the target object.
2. The method of controlling a refrigeration system according to claim 1, wherein controlling the first compressor to perform a refrigeration operation based on the refrigeration control instruction comprises:
judging whether the current temperature value of the target object is larger than a preset temperature threshold value or not;
if yes, controlling the first compressor to work by a proportional-integral-derivative control method based on the refrigeration control instruction by utilizing a temperature deviation, wherein the temperature deviation is the difference value between the current temperature value of the target object and the preset temperature threshold value;
and if not, controlling the first compressor to work by utilizing the temperature deviation and the superheat degree of the refrigerating system.
3. The control method of a refrigeration system according to claim 2, wherein controlling the operation of the first compressor by a proportional-integral-derivative control method using a temperature deviation based on the refrigeration control command includes:
acquiring a target refrigeration temperature in the refrigeration control instruction;
and calculating by the proportional-integral-derivative control method based on the target refrigeration temperature and the temperature deviation to obtain the corresponding expansion valve step and the refrigeration capacity of the first compressor.
4. The method of controlling a refrigerant system as set forth in claim 2, wherein controlling operation of said first compressor utilizing said temperature deviation and a superheat of said refrigerant system together includes:
acquiring the superheat degree of a refrigerant in the refrigeration system;
determining a valve step reduction speed of an electronic expansion valve based on the superheat degree, wherein the electronic expansion valve is an electronic expansion valve connected with the first compressor;
and controlling the valve step contraction of the electronic expansion valve based on the valve step contraction speed, and simultaneously controlling the first compressor to work by a proportional-integral-derivative control method by utilizing the temperature deviation.
5. The control method of a refrigeration system according to claim 1, characterized in that the control method further comprises:
and in the working process of the second compressor, if the refrigeration control instruction is received again, closing the second compressor, and restarting the first compressor to perform refrigeration work based on the refrigeration control instruction.
6. The control method of a refrigeration system according to claim 2, wherein before controlling the operation of the first compressor by a proportional-integral-derivative control method using a temperature deviation based on the refrigeration control instruction, the control method further comprises:
and calculating the temperature deviation between the current temperature value and the preset temperature threshold value.
7. The method of controlling a refrigeration system according to claim 1, wherein the first compressor has a refrigerating output range of 5 to 7HP and the second compressor has a refrigerating output range of 2 to 3HP.
8. The method for controlling a refrigeration system according to claim 7, wherein the cooling capacity of the first compressor is 6HP and the cooling capacity of the second compressor is 2HP.
9. A refrigeration system, characterized in that it performs the control method of the refrigeration system according to any one of the preceding claims 1 to 8; the refrigerating system comprises a first compressor and a second compressor, the power of the first compressor is larger than that of the second compressor, the refrigerating system further comprises two evaporators, two condensers and two electronic expansion valves, and the first compressor and the second compressor are respectively connected with one condenser, one electronic expansion valve and one evaporator in sequence.
CN202310504712.6A 2023-05-06 2023-05-06 Control method of refrigerating system and refrigerating system Pending CN116379660A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310504712.6A CN116379660A (en) 2023-05-06 2023-05-06 Control method of refrigerating system and refrigerating system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310504712.6A CN116379660A (en) 2023-05-06 2023-05-06 Control method of refrigerating system and refrigerating system

Publications (1)

Publication Number Publication Date
CN116379660A true CN116379660A (en) 2023-07-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310504712.6A Pending CN116379660A (en) 2023-05-06 2023-05-06 Control method of refrigerating system and refrigerating system

Country Status (1)

Country Link
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