CN113251728A - Refrigerating unit control method and device and refrigerating unit - Google Patents
Refrigerating unit control method and device and refrigerating unit Download PDFInfo
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- CN113251728A CN113251728A CN202110572423.0A CN202110572423A CN113251728A CN 113251728 A CN113251728 A CN 113251728A CN 202110572423 A CN202110572423 A CN 202110572423A CN 113251728 A CN113251728 A CN 113251728A
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- heat exchanger
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- indoor heat
- defrosting
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D13/00—Stationary devices, e.g. cold-rooms
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/06—Removing frost
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/005—Mounting of control devices
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- Defrosting Systems (AREA)
Abstract
The invention discloses a refrigerating unit control method and device and a refrigerating unit. Wherein the refrigeration unit comprises an outdoor heat exchanger and at least two indoor heat exchangers, the method comprising: determining that an indoor heat exchanger in the refrigerating unit meets defrosting conditions, and recording as a target heat exchanger; controlling the target heat exchanger to defrost, and controlling other indoor heat exchangers to refrigerate; and controlling whether the target heat exchanger continues defrosting or not according to the indoor temperature. According to the invention, in the defrosting mode, whether the target heat exchanger continues defrosting is timely and reasonably controlled based on the indoor temperature, the indoor temperature exceeding range caused by defrosting can be avoided, and the indoor temperature is kept stable.
Description
Technical Field
The invention relates to the technical field of refrigeration house units, in particular to a control method and device of a refrigerating unit and the refrigerating unit.
Background
A freezer that is used for depositing article (such as bacterin, medicine, food etc.) generally needs the unit to control the temperature and control humidity, and in the refrigeration process, the evaporimeter can frost, when defrosting the evaporimeter, needs the heat release, can lead to the temperature rise in the freezer, influences the effective storage of article. At present, a cold storage needs to be provided with two sets of units for dealing with the conditions of unit failure or defrosting and the like, the temperature precision of the cold storage is kept at 2-8 ℃ through strong current control, but the cost is higher due to the use of the two sets of units.
Disclosure of Invention
The embodiment of the invention provides a refrigerating unit control method and device and a refrigerating unit, and at least solves the problems that in the prior art, defrosting causes temperature rise or defrosting cost is high.
In order to solve the above technical problem, an embodiment of the present invention provides a method for controlling a refrigeration unit, where the refrigeration unit includes an outdoor heat exchanger and at least two indoor heat exchangers, and the method includes: determining that an indoor heat exchanger in the refrigerating unit meets defrosting conditions, and recording as a target heat exchanger; controlling the target heat exchanger to defrost, and controlling other indoor heat exchangers to refrigerate; and controlling whether the target heat exchanger continues defrosting or not according to the indoor temperature.
Optionally, controlling whether the target heat exchanger continues defrosting according to the indoor temperature includes: under the condition that the defrosting exit condition is not met, judging whether the indoor temperature is greater than or equal to a first preset temperature or not; if the indoor temperature is greater than or equal to the first preset temperature, controlling the target heat exchanger to stop defrosting, and recording the defrosting time t1 of the target heat exchanger; judging whether the indoor temperature is less than or equal to a second preset temperature; and if the indoor temperature is less than or equal to the second preset temperature, controlling the target heat exchanger to continue defrosting, wherein the defrosting continuing time of the target heat exchanger does not exceed t2-t1, and t2 represents a preset defrosting time.
Optionally, after determining whether the indoor temperature is less than or equal to a second preset temperature, the method further includes: if the indoor temperature is higher than the second preset temperature and the defrosting stop time of the target heat exchanger is longer than or equal to the dripping time, controlling the target heat exchanger to start refrigerating; and in the refrigeration process of the target heat exchanger, if a preset condition is met, controlling the target heat exchanger to continue defrosting, wherein the continuous defrosting time of the target heat exchanger does not exceed t2-t 1.
Optionally, each indoor heat exchanger is correspondingly provided with at least one detection point, and the detection points are used for detecting temperature; the preset condition comprises at least one of the following conditions: the temperature of any detection point corresponding to the target heat exchanger is less than or equal to the shutdown temperature; and the refrigerating operation of the target heat exchanger exceeds the preset time, and the temperature of all detection points corresponding to the target heat exchanger is less than or equal to the second preset temperature.
Optionally, determining whether the indoor temperature is greater than or equal to a first preset temperature includes: judging whether the temperatures of all indoor detection points are greater than or equal to the first preset temperature, and if so, determining that the indoor temperature is greater than or equal to the first preset temperature; judging whether the indoor temperature is less than or equal to a second preset temperature or not, including: and judging whether the temperatures of all detection points corresponding to the target heat exchanger are less than or equal to the second preset temperature, and if so, determining that the indoor temperature is less than or equal to the second preset temperature.
Optionally, the method further includes: in a refrigeration mode, controlling the indoor heat exchanger to refrigerate according to the temperature of a detection point corresponding to the indoor heat exchanger; in the process of refrigerating any indoor heat exchanger, judging whether the temperature of a detection point in a room is greater than or equal to the refrigerating compensation starting temperature; and if the indoor heat exchanger exists, controlling the indoor heat exchanger in the non-refrigeration state to perform refrigeration compensation according to a preset rule.
Optionally, after controlling the indoor heat exchanger in the non-refrigeration state to perform refrigeration compensation according to a preset rule, the method further includes: in the process of refrigeration compensation, judging whether the temperatures of all detection points in the room are less than or equal to the refrigeration compensation closing temperature; and if the temperature of all the indoor detection points is less than or equal to the refrigeration compensation closing temperature, controlling the indoor heat exchanger in the refrigeration compensation state to stop refrigerating.
Optionally, control other indoor heat exchangers and refrigerate, perhaps, refrigerate according to the indoor heat exchanger of check point temperature control that indoor heat exchanger corresponds under the refrigeration mode, include: if any detection point temperature corresponding to the indoor heat exchanger is detected to be greater than or equal to the starting temperature, the indoor heat exchanger is controlled to start and refrigerate; and if the temperature of any detection point corresponding to the indoor heat exchanger is less than or equal to the shutdown temperature, controlling the indoor heat exchanger to stop refrigerating.
Optionally, the method further includes: and if the indoor heat exchanger is determined to be in fault, refrigerating or defrosting by using other indoor heat exchangers without faults.
The embodiment of the invention also provides a refrigerating unit control device, the refrigerating unit comprises an outdoor heat exchanger and at least two indoor heat exchangers, and the device comprises: the determining module is used for determining that an indoor heat exchanger in the refrigerating unit meets defrosting conditions and recording the indoor heat exchanger as a target heat exchanger; the first control module is used for controlling the target heat exchanger to defrost and controlling other indoor heat exchangers to refrigerate; and the second control module is used for controlling whether the target heat exchanger continues defrosting or not according to the indoor temperature.
An embodiment of the present invention further provides a refrigeration unit, including: the system comprises an outdoor heat exchanger, at least two indoor heat exchangers and a refrigerating unit control device.
Embodiments of the present invention also provide a computer-readable storage medium having a computer program stored thereon, where the computer program is executed by a processor to implement a refrigeration unit control method according to an embodiment of the present invention.
By applying the technical scheme of the invention, the condition that an indoor heat exchanger in a refrigerating unit meets defrosting conditions is determined, and the condition is recorded as a target heat exchanger; controlling a target heat exchanger to defrost, and controlling other indoor heat exchangers to refrigerate; and controlling whether the target heat exchanger continues defrosting according to the indoor temperature. In the defrosting mode, whether the target heat exchanger continues defrosting is timely and reasonably controlled based on the indoor temperature, the condition that the indoor temperature exceeds the range caused by defrosting can be avoided, and therefore the indoor temperature is stable.
Drawings
FIG. 1 is a flow chart of a method of controlling a refrigeration unit according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a refrigeration unit provided in accordance with a second embodiment of the present invention;
fig. 3 is a schematic view of a refrigerator according to a second embodiment of the present invention;
fig. 4 is a control flowchart of the refrigeration unit in the cooling mode according to the second embodiment of the present invention;
fig. 5A is a control flowchart of the second indoor heat exchanger 12 in the first refrigeration sub-mode according to the second embodiment of the present invention;
fig. 5B is a control flowchart of the first indoor heat exchanger 11 in the second refrigeration sub-mode according to the second embodiment of the present invention;
fig. 6 is a control flowchart of the refrigeration unit in the defrosting mode according to the second embodiment of the present invention;
fig. 7 is a control flow chart of the refrigeration unit in the failure mode according to the second embodiment of the present invention;
fig. 8 is a block diagram of a refrigeration unit control device according to a third embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
Example one
The embodiment provides a control method for a refrigerating unit, which is applicable to a refrigeration house for storing articles (such as vaccines, medicines, foods, and the like), and particularly, a unit adopting a fixed-frequency compressor can accurately control the temperature, so that the temperature is stabilized within a required range. The refrigeration unit in this embodiment includes an outdoor heat exchanger and at least two indoor heat exchangers, and the specific connection of the indoor heat exchangers is not limited in the embodiment of the present invention, as long as the operation can be performed according to the subsequent control logic.
Fig. 1 is a flowchart of a control method for a refrigeration unit according to an embodiment of the present invention, as shown in fig. 1, the method includes the following steps:
s101, determining that an indoor heat exchanger in the refrigerating unit meets defrosting conditions, and recording as a target heat exchanger.
And S102, controlling the target heat exchanger to defrost, and controlling other indoor heat exchangers to refrigerate.
And S103, controlling whether the target heat exchanger continues defrosting according to the indoor temperature.
And (4) detecting whether the defrosting condition is met or not independently aiming at each indoor heat exchanger. And if the indoor heat exchangers in the refrigerating unit meet the defrosting condition (marked as target heat exchangers), the refrigerating unit enters a defrosting mode, and in the defrosting mode, the target heat exchangers are controlled to defrost and other indoor heat exchangers are controlled to refrigerate, and whether the target heat exchangers continue to defrost is controlled according to the indoor temperature. The indoor temperature may be referred to as a refrigerator temperature or a storage temperature. The defrosting mode can be thermal fluorination defrosting, and other defrosting modes such as electric heating defrosting and the like.
The control method of the refrigerating unit of the embodiment determines that an indoor heat exchanger in the refrigerating unit meets defrosting conditions, and records the condition as a target heat exchanger; controlling a target heat exchanger to defrost, and controlling other indoor heat exchangers to refrigerate; and controlling whether the target heat exchanger continues defrosting according to the indoor temperature. Under the defrosting mode, whether the target heat exchanger continues defrosting or not is reasonably controlled in time based on the indoor temperature, and the condition that the indoor temperature exceeds the range due to defrosting can be avoided, so that the stability of the indoor temperature is maintained. And the refrigerating unit comprises an outdoor heat exchanger and at least two indoor heat exchangers, so that the cost is reduced compared with two sets of units which are used for one standby.
In one embodiment, controlling whether defrosting of a target heat exchanger continues according to an indoor temperature includes: under the condition that the defrosting exit condition is not met, judging whether the indoor temperature is greater than or equal to a first preset temperature or not; if the indoor temperature is greater than or equal to the first preset temperature, controlling the target heat exchanger to stop defrosting, and recording the defrosting time t1 of the target heat exchanger; judging whether the indoor temperature is less than or equal to a second preset temperature; and if the indoor temperature is less than or equal to the second preset temperature, controlling the target heat exchanger to continue defrosting, wherein the defrosting continuing time of the target heat exchanger does not exceed t2-t1, and t2 represents the preset defrosting time.
Under the condition that the current target heat exchanger meets the defrosting exit condition, if an indoor heat exchanger is defrosting, the current target heat exchanger meeting the defrosting exit condition is used as other indoor heat exchangers for refrigerating control, and if no indoor heat exchanger is defrosting, the refrigerating unit exits the defrosting mode, enters the refrigerating mode and operates according to the control logic in the refrigerating mode. The defrosting condition and the defrosting exit condition can use the existing common conditions, for example, the defrosting condition can be the refrigerating operation time length, the evaporator coil temperature, the unit pressure, the frost layer thickness and the like, and the defrosting exit condition can be the defrosting time length, the evaporator coil temperature and the like.
The first preset temperature and the second preset temperature may be set according to actual conditions. The values of the first preset temperature and the second preset temperature are both in a preset temperature range, and the preset temperature range refers to an indoor target temperature range, such as 2-8 ℃. The first preset temperature is greater than the second preset temperature. The indoor temperature is greater than or equal to the first preset temperature, which means that the indoor temperature is high, and if defrosting is continued, the indoor temperature is likely to exceed the preset temperature range (such as 2-8 ℃). The indoor temperature is less than or equal to the second preset temperature, which indicates that the indoor temperature is reduced, and defrosting can be continued.
In the present embodiment, when the defrosting exit condition is not satisfied, if the indoor temperature is greater than or equal to the first preset temperature, the target heat exchanger is controlled to stop defrosting; if after stopping changing the frost, indoor temperature is less than or equal to the second and predetermines the temperature, then control target heat exchanger continues to change the frost, through the aforesaid according to indoor temperature to the reasonable control of changing the frost progress, can be with indoor temperature stabilization in predetermineeing the temperature range, avoid indoor temperature to rise and influence the effective storage of article. Meanwhile, the defrosting time is recorded and controlled, and unnecessary excessive defrosting can be avoided.
Further, after determining whether the indoor temperature is less than or equal to the second preset temperature, the method further includes: if the indoor temperature is higher than the second preset temperature and the defrosting stop time of the target heat exchanger is longer than or equal to the dripping time, controlling the target heat exchanger to start refrigerating; in the refrigeration process of the target heat exchanger, if a preset condition is met, the target heat exchanger is controlled to continue defrosting, and the continuous defrosting time of the target heat exchanger does not exceed t2-t 1.
The dripping time refers to the shortest shutdown time between the defrosting stop and the next starting and cooling. After stopping defrosting, the defrosting stop time is more than or equal to the dripping time, and then refrigeration is carried out, so that the evaporator for defrosting can be ensured to be cooled down, and the heat for defrosting the evaporator is prevented from being directly blown out by the fan. In the refrigeration process of the target heat exchanger, the preset condition is met, the temperature is low enough, and defrosting can be continuously carried out.
According to the defrosting method and the defrosting device, after the target heat exchanger stops defrosting, if the water dripping time is exceeded and the indoor temperature is not reduced to the second preset temperature, the target heat exchanger starts to refrigerate, so that the temperature is reduced as soon as possible to continue defrosting, defrosting is fully performed on the basis that the room temperature does not exceed the preset temperature range, and the defrosting effect is guaranteed.
In this embodiment, each indoor heat exchanger may be correspondingly provided with at least one temperature detection point (referred to as a detection point for short), and a temperature sensor may be disposed at the detection point. Specifically, the indoor heat exchanger can be divided into regions, each indoor heat exchanger corresponds to one region, and at least one detection point is arranged in the region corresponding to each indoor heat exchanger. The distribution of the detection points in the area can be determined according to the size of the area space, and the detection points which are uniformly distributed can better reflect the temperature condition in the area. It should be noted that the average value of the temperatures of all the detection points corresponding to a certain indoor heat exchanger may also be used as the area temperature corresponding to the indoor heat exchanger, and the unit may be controlled to perform cooling and defrosting according to the area temperature.
The preset condition comprises at least one of the following conditions: the temperature of any detection point corresponding to the target heat exchanger is less than or equal to the shutdown temperature; the refrigerating operation of the target heat exchanger exceeds the preset time, and the temperature of all detection points corresponding to the target heat exchanger is less than or equal to a second preset temperature. Satisfying at least one of the above conditions indicates that defrosting can be continued.
In an optional embodiment, determining whether the indoor temperature is greater than or equal to a first preset temperature includes: and judging whether the temperatures of all the indoor detection points are greater than or equal to a first preset temperature, and if so, determining that the indoor temperature is greater than or equal to the first preset temperature. And if the temperature of any indoor detection point is lower than the first preset temperature, determining that the indoor temperature is lower than the first preset temperature. This embodiment carries out the judgement of first default temperature based on all indoor check point temperatures, can be comparatively accurate reasonable reflect the whole condition of indoor temperature, when indoor temperature is whole higher, can not continue to change the frost, provides the guarantee for accurate control by temperature change.
In an optional embodiment, determining whether the indoor temperature is less than or equal to a second preset temperature includes: and judging whether the temperatures of all detection points corresponding to the target heat exchanger are less than or equal to a second preset temperature, and if so, determining that the indoor temperature is less than or equal to the second preset temperature. And if the temperature of any detection point corresponding to the target heat exchanger is higher than the second preset temperature, determining that the indoor temperature is higher than the second preset temperature. This embodiment carries out the judgement that the temperature was preset to the second based on the check point temperature that the target heat exchanger corresponds, can be comparatively accurate reasonable reflect the regional temperature condition that the target heat exchanger corresponds, when this temperature reduces to a certain extent, can continue to change the frost, provides the guarantee for accurate control by temperature change.
Of course, for more precise control, the second preset temperature may be determined based on all the indoor detection point temperatures, so as to perform control according to the overall situation of the indoor temperature.
In one embodiment, a refrigeration compensation function is provided, when the indoor temperature cannot be reduced in the process of refrigerating by the indoor heat exchanger, the refrigeration compensation can be started, and the starting condition of the indoor heat exchanger in the non-refrigeration state is changed into the refrigeration compensation starting temperature. Specifically, in the refrigeration mode, the indoor heat exchanger is controlled to refrigerate according to the temperature of a detection point corresponding to the indoor heat exchanger; in the process of refrigerating any indoor heat exchanger, judging whether the temperature of a detection point in a room is greater than or equal to the refrigerating compensation starting temperature; and if the indoor heat exchanger exists, controlling the indoor heat exchanger in the non-refrigeration state to perform refrigeration compensation according to a preset rule.
The preset rule is a refrigeration compensation opening rule of the indoor heat exchanger in an uncooled state, and the preset rule comprises the number of openings, the opening priority and the like.
The embodiment performs refrigeration compensation based on the detection point temperature and the refrigeration compensation starting temperature, and can ensure that the indoor temperature is quickly stabilized to a preset temperature range.
Further, after controlling the indoor heat exchanger in the non-refrigeration state to perform refrigeration compensation according to a preset rule, the method further comprises the following steps: in the process of refrigeration compensation, judging whether the temperatures of all detection points in the room are less than or equal to the refrigeration compensation closing temperature; and if the temperature of all the indoor detection points is less than or equal to the refrigeration compensation closing temperature, controlling the indoor heat exchanger in the refrigeration compensation state to stop refrigerating.
The refrigeration compensation opening temperature and the refrigeration compensation closing temperature are both in a preset temperature range, the refrigeration compensation closing temperature is smaller than the refrigeration compensation opening temperature, and the refrigeration compensation opening temperature is closer to the upper limit value of the preset temperature range. When the condition of refrigeration compensation closing is met, the related indoor heat exchangers are controlled to stop refrigeration in time, so that the energy consumption of the unit is reduced on the basis of maintaining stable temperature.
For example, the indoor heat exchanger a is just started to perform cooling, but the indoor temperature is not reduced, the temperature is already raised to the cooling compensation starting temperature, and the indoor heat exchanger B can be started to perform cooling compensation. For another example, when the indoor heat exchanger a performs refrigeration, the ambient temperature thereof has been reduced, but the ambient temperature of the indoor heat exchanger B is less affected by the refrigeration, and has been raised to the refrigeration compensation starting temperature, at this time, the indoor heat exchanger B also needs to be started to perform refrigeration compensation.
Other indoor heat exchangers of control refrigerate under the mode of defrosting, perhaps, refrigerate according to the indoor heat exchanger of check point temperature control that indoor heat exchanger corresponds under the mode of refrigerating, include: if any detection point temperature corresponding to the indoor heat exchanger is detected to be greater than or equal to the starting temperature, the indoor heat exchanger is controlled to start and refrigerate; and if the temperature of any detection point corresponding to the indoor heat exchanger is less than or equal to the shutdown temperature, controlling the indoor heat exchanger to stop refrigerating.
The indoor heat exchangers can be respectively provided with corresponding starting temperatures and shutdown temperatures, and all the indoor heat exchangers can use uniform starting temperatures and shutdown temperatures. The values of the starting temperature and the shutdown temperature are both in a preset temperature range, and the starting temperature is greater than the shutdown temperature. The refrigeration compensation closing temperature is greater than the shutdown temperature and is closer to the value of the startup temperature; the refrigeration compensation starting temperature is greater than the starting temperature.
This embodiment is based on check point temperature, start temperature and shutdown temperature, can rationally effectively control indoor heat exchanger and refrigerate, guarantees that indoor temperature does not surpass and predetermines the temperature range, maintains the temperature stability. In addition, in consideration of the possible difference of the temperatures of the detection points, if the temperature of the detection point a corresponding to the indoor heat exchanger is first reduced to the shutdown temperature, the temperature of the detection point a can be further reduced in the process of waiting for the temperature of other detection points corresponding to the indoor heat exchanger to be reduced to the shutdown temperature, and the temperature of the detection point a is probably lower than the preset temperature range, which is not beneficial to accurate temperature control.
It should be noted that, in practical application, whether each indoor heat exchanger meets the starting temperature condition or not may be detected according to a preset sequence, and if the current indoor heat exchanger does not meet the starting temperature condition, whether the next indoor heat exchanger meets the starting temperature condition or not may be detected, and if the current indoor heat exchanger meets the starting temperature condition, whether the next indoor heat exchanger meets the starting temperature condition or not may not be detected, so that the simultaneous opening of multiple indoor heat exchangers is avoided, and the energy consumption is reduced. Or whether each indoor heat exchanger meets the starting temperature condition or not can be detected simultaneously, if two or more indoor heat exchangers meet the starting temperature condition, the indoor heat exchanger with the high priority can be selected according to the preset priority to perform refrigeration preferentially, and the energy consumption can be reduced as well. Similarly, whether each indoor heat exchanger satisfies the condition of changing frost can also be detected according to the order of predetermineeing, and current indoor heat exchanger does not satisfy the condition of changing frost, then detects next indoor heat exchanger and whether satisfies the condition of changing frost, if current indoor heat exchanger satisfies the condition of changing frost, then can not go to detect next indoor heat exchanger and whether satisfy the condition of changing frost to it leads to indoor temperature to surpass and predetermines the temperature range to avoid a plurality of indoor heat exchangers to change frost simultaneously.
In one embodiment, the method may further include: and if the indoor heat exchanger is determined to be in fault, other indoor heat exchangers which are not in fault are utilized for refrigerating or defrosting so as to maintain the indoor temperature to be stable. For example, if the unit outputs a fault signal, the indoor heat exchangers may be respectively started to operate according to a preset sequence, so as to determine which indoor heat exchanger has a fault. And if the indoor heat exchangers are all in fault, controlling the refrigerating unit to stop.
Example two
The present embodiment describes the above-mentioned refrigeration unit control method with reference to a specific example, however, it should be noted that this specific example is only for better describing the present application and should not be construed as a limitation to the present application. The same or corresponding terms as those of the above-described embodiments are explained, and the description of the present embodiment is omitted.
In this embodiment, a one-to-two refrigeration unit is taken as an example, that is, the refrigeration unit includes an outdoor heat exchanger and two indoor heat exchangers, and for the refrigeration unit, during refrigeration, the indoor heat exchangers are used as evaporators, and the indoor heat exchangers can also be called air coolers. As shown in fig. 2, the refrigerating unit includes: indoor set and off-premises station, the off-premises station includes: the system comprises a compressor 1, a standby compressor 2, a four-way valve 3, an outdoor heat exchanger 4 (which can be a finned condenser), a liquid storage tank 5, a drying filter 6, a vapor-liquid separator 15, an air suction filter 16 (bidirectional), an air suction stop valve 17, a liquid supply stop valve 18, a high-pressure sensor 19, a low-pressure sensor 20, an exhaust temperature sensing bulb 21 and an air suction temperature sensing bulb 22. The indoor unit includes: a first indoor heat exchanger 11, a second indoor heat exchanger 12, a first electronic expansion valve 7, a second electronic expansion valve 9, a first solenoid valve 8, a second solenoid valve 10, a first three-way valve 13, and a second three-way valve 14. Spare compressor 2 can be installed or not install, if install spare compressor 2, can be under the condition of compressor 1 trouble, with the refrigerant circulation system of spare compressor 2 access unit in, guarantee unit normal use.
As shown in fig. 3, the schematic diagram of the refrigeration storage is that each indoor heat exchanger corresponds to two detection points, and a temperature sensing bulb is installed at each detection point and used for detecting the temperature of the refrigeration storage. Specifically, the first indoor heat exchanger 11 corresponds to the first bulb 21 and the third bulb 23, and the second indoor heat exchanger 12 corresponds to the second bulb 22 and the fourth bulb 24. The first bulb 21 is installed at the return air of the first indoor heat exchanger 11, and the second bulb 22 is installed at the return air of the second indoor heat exchanger 12. The positions of the third bulb 23 and the fourth bulb 24 may be specifically arranged according to the design of the refrigerator, for example, the third bulb 23 is installed above the shelf opposite to the first indoor heat exchanger 11, and the fourth bulb 24 is installed above the shelf opposite to the second indoor heat exchanger 12. By collecting the temperature of the thermal bulb, the unit is controlled to be started and stopped and defrosting is carried out according to the temperature. If the electric heating defrosting mode is used, the pipeline connection of the refrigerating unit can be simpler, and the two indoor heat exchangers are connected in parallel.
The following describes specific control of the refrigerating machine group shown in fig. 2 in the cooling mode, the defrosting mode, or in the case of a failure.
As shown in fig. 4, a control flow chart of the refrigeration unit in the cooling mode includes the following steps:
and S401, entering a cooling mode.
S402, determining whether the temperature of the first thermal bulb 21 or the third thermal bulb 23 is greater than or equal to the starting temperature of the first indoor heat exchanger 11, if so, entering S403, and if not, entering S410.
And S403, starting and cooling the first indoor heat exchanger 11. Specifically, in fig. 2, if the first indoor heat exchanger 11 meets the startup condition, the first three-way valve 13 connects the outdoor unit with the first electronic expansion valve 7, the first electronic expansion valve 7 and the first solenoid valve 8 are opened, and the second three-way valve 14, the second electronic expansion valve 9 and the second solenoid valve 10 are closed. The refrigerant flowing out of the outdoor unit sequentially passes through the first three-way valve 13 and the first electronic expansion valve 7 and then enters the first indoor heat exchanger 11, and then the refrigerant flowing out of the first indoor heat exchanger 11 flows back to the outdoor unit through the first electromagnetic valve 8.
S404, determining whether the temperature of the first thermal bulb 21 or the third thermal bulb 23 is less than or equal to the shutdown temperature of the first indoor heat exchanger 11, if so, entering S409, and if not, entering S405.
S405, judging whether any temperature of the first thermal bulb 21, the second thermal bulb 22, the third thermal bulb 23 and the fourth thermal bulb 24 is larger than or equal to the refrigeration compensation starting temperature, if so, entering S406, otherwise, returning to S404.
And S406, starting the second indoor heat exchanger 12 for refrigeration compensation.
S407, it is determined whether the temperatures of the first thermal bulb 21, the second thermal bulb 22, the third thermal bulb 23, and the fourth thermal bulb 24 are all less than or equal to the refrigeration compensation shutdown temperature, if yes, S408 is entered, and if not, the determination of the refrigeration compensation shutdown temperature is continued.
S408, the second indoor heat exchanger 12 is stopped, i.e., the refrigeration compensation is stopped. And then returns to S404.
S409, the first indoor heat exchanger 11 is stopped, that is, cooling is stopped. And then returns to S402.
S410, determine whether the temperature of the second thermal bulb 22 or the fourth thermal bulb 24 is greater than or equal to the starting temperature of the second indoor heat exchanger 12, if yes, go to S411, if no, return to S402.
And S411, starting the second indoor heat exchanger 12 for refrigeration. Specifically, in fig. 2, if the second indoor heat exchanger 12 meets the startup condition, the second three-way valve 14 connects the outdoor unit with the second electronic expansion valve 9, the second electronic expansion valve 9 and the second solenoid valve 10 are opened, and the first three-way valve 13, the first electronic expansion valve 7 and the first solenoid valve 8 are all closed. The refrigerant flowing out of the outdoor unit sequentially passes through the second three-way valve 14 and the second electronic expansion valve 9 and then enters the second indoor heat exchanger 12, and then the refrigerant flowing out of the first indoor heat exchanger 11 flows back to the outdoor unit through the second electromagnetic valve 10.
S412, it is determined whether the temperature of the second thermal bulb 22 or the fourth thermal bulb 24 is less than or equal to the shutdown temperature of the second indoor heat exchanger 12, if so, the process proceeds to S417, and if not, the process proceeds to S413.
S413, determining whether any temperature of the first thermal bulb 21, the second thermal bulb 22, the third thermal bulb 23, and the fourth thermal bulb 24 is greater than or equal to the refrigeration compensation starting temperature, if so, proceeding to S414, otherwise, returning to S412.
And S414, starting the first indoor heat exchanger 11 to perform refrigeration compensation.
S415, it is determined whether the temperatures of the first thermal bulb 21, the second thermal bulb 22, the third thermal bulb 23, and the fourth thermal bulb 24 are all less than or equal to the cooling compensation shutdown temperature, if yes, S416 is entered, and if no, the determination of the cooling compensation shutdown temperature is continued.
S416, the first indoor heat exchanger 11 is stopped, that is, the refrigeration compensation is stopped. And then returns to S412.
S417, the second indoor heat exchanger 12 is stopped, that is, cooling is stopped. And then returns to S402.
Under the normal refrigeration mode, the temperature of each detection point in the cold storage is detected respectively, the on-off control of the indoor heat exchanger is carried out according to the detected temperature, the temperature in the cold storage is ensured to be within a preset temperature range, and the refrigeration compensation function is provided, so that the temperature is controlled to be within the preset temperature range in time after the cold storage is started.
In a refrigeration mode, if refrigeration compensation is needed, both the first indoor heat exchanger 11 and the second indoor heat exchanger 12 are started, one path of refrigerant flowing out of the outdoor unit sequentially passes through the first three-way valve 13 and the first electronic expansion valve 7 and then enters the first indoor heat exchanger 11, the refrigerant flowing out of the first indoor heat exchanger 11 flows back to the outdoor unit through the first electromagnetic valve 8, the other path of refrigerant sequentially passes through the second three-way valve 14 and the second electronic expansion valve 9 and then enters the second indoor heat exchanger 12, the refrigerant flowing out of the second indoor heat exchanger 12 flows back to the outdoor unit through the second electromagnetic valve 10, and the two indoor heat exchangers are connected in parallel for refrigeration operation.
And under the defrosting mode, controlling the indoor heat exchangers meeting the defrosting condition to defrost, and controlling other indoor heat exchangers to refrigerate. In the defrosting mode, the cooling control of the other indoor heat exchangers may be referred to as a "cooling sub-mode". Specifically, in this embodiment, the first indoor heat exchanger 11 corresponds to the second refrigeration sub-mode, and the second indoor heat exchanger 12 corresponds to the first refrigeration sub-mode, which will be described in detail below.
As shown in fig. 5A, a control flow chart of the second indoor heat exchanger 12 in the first cooling sub-mode includes the following steps:
s501, entering a first refrigeration sub-mode.
S502, determine whether the temperature of the second thermal bulb 22 or the fourth thermal bulb 24 is greater than or equal to the starting temperature of the second indoor heat exchanger 12, if yes, go to S503, if not, continue to determine the starting temperature.
And S503, starting the second indoor heat exchanger 12 for cooling.
S504, determine whether the temperature of the second thermal bulb 22 or the fourth thermal bulb 24 is less than or equal to the shutdown temperature of the second indoor heat exchanger 12, if yes, go to S505, and if not, continue to determine the shutdown temperature.
S505, the second indoor heat exchanger 12 stops cooling.
As shown in fig. 5B, a control flowchart of the first indoor heat exchanger 11 in the second cooling sub-mode includes the following steps:
and S511, entering a second refrigeration sub-mode.
S512, determining whether the temperature of the first thermal bulb 21 or the third thermal bulb 23 is greater than or equal to the starting temperature of the first indoor heat exchanger 11, if so, entering S513, and if not, continuing to determine the starting temperature.
And S513, starting the first indoor heat exchanger 11 for cooling.
And S514, judging whether the temperature of the first thermal bulb 21 or the third thermal bulb 23 is less than or equal to the shutdown temperature of the first indoor heat exchanger 11, if so, entering S515, and if not, continuing to judge the shutdown temperature.
S515, the first indoor heat exchanger 11 stops cooling.
As shown in fig. 6, a control flow chart of the refrigeration unit in the defrosting mode includes the following steps:
s601, determining whether the first indoor heat exchanger 11 satisfies a defrosting condition, if yes, going to S602, and if no, going to S611.
And S602, defrosting the first indoor heat exchanger 11, and enabling the second indoor heat exchanger 12 to enter a first refrigeration sub-mode.
And S603, judging whether the defrosting exit condition is met, if so, entering S605, and if not, entering S604.
S604, judging whether the temperatures of the first thermal bulb 21, the second thermal bulb 22, the third thermal bulb 23 and the fourth thermal bulb 24 are all larger than or equal to a first preset temperature, if so, entering S606, otherwise, returning to S603.
And S605, exiting the defrosting mode and entering a refrigerating mode.
And S606, stopping defrosting of the first indoor heat exchanger 11, and recording the defrosting time period t 1.
S607, determining whether the temperatures of the first thermal bulb 21 and the third thermal bulb 23 are both less than or equal to the second predetermined temperature, if yes, going to S608, if no, going to S609.
And S608, continuing defrosting by the first indoor heat exchanger 11 for a period of time not exceeding t2-t1, wherein t2 represents a preset defrosting time period. Then, the routine proceeds to S603 to continue the judgment of the defrosting exit condition.
And S609, judging whether the defrosting stop time is more than or equal to the dripping time, if so, entering S610, otherwise, returning to S607.
S610, the first indoor heat exchanger 11 starts cooling. And then proceeds to S607 to continue the judgment of the second preset temperature.
And S611, defrosting the second indoor heat exchanger 12, and enabling the first indoor heat exchanger 11 to enter a second refrigeration sub-mode.
And S612, judging whether a defrosting exit condition is met, if so, entering S614, and if not, entering S613.
S613, determining whether the temperatures of the first thermal bulb 21, the second thermal bulb 22, the third thermal bulb 23 and the fourth thermal bulb 24 are all greater than or equal to a first preset temperature, if yes, entering S615, otherwise, returning to S612.
And S614, exiting the defrosting mode and entering a refrigerating mode.
And S615, stopping defrosting of the second indoor heat exchanger 12, and recording the defrosting time t 1.
S616 determines whether the temperatures of the second thermal bulb 22 and the fourth thermal bulb 24 are both less than or equal to the second predetermined temperature, if so, the process proceeds to S617, and if not, the process proceeds to S618.
And S617, continuing defrosting by the second indoor heat exchanger 12 for a period of time not exceeding t2-t1, wherein t2 represents a preset defrosting time period. Then, the routine proceeds to S612 to continue the judgment of the defrosting exit condition.
And S618, judging whether the defrosting stop time is greater than or equal to the dripping time, if so, entering S619, otherwise, returning to S616.
S619, the second indoor heat exchanger 12 starts cooling. Then, the process proceeds to S616 to continue the determination of the second preset temperature.
As shown in fig. 7, which is a control flow chart of the refrigeration unit in the failure mode, when the refrigeration unit enters a failure state, the first indoor heat exchanger 11 or the second indoor heat exchanger 12 is turned on to determine which indoor heat exchanger has no failure, so as to perform unit operation control and maintain temperature stability.
The method comprises the following steps:
and S701, the refrigerating unit detects a fault and enters a fault mode.
S702, judging whether the fault is recovered, if so, entering S703, and if not, entering S704.
And S703, entering a cooling mode.
S704, determining whether the first indoor heat exchanger 11 has a fault after being started, if so, proceeding to S705, and if not, proceeding to S710.
S705, the operation enters the first cooling sub-mode, and cooling is performed by the second indoor heat exchanger 12.
And S706, judging whether the defrosting condition is met, if so, entering S707, and if not, continuously judging whether the defrosting condition is met.
S707, the second indoor heat exchanger 12 enters a defrosting mode.
And S708, judging whether a defrosting exit condition is met or not or judging whether the temperatures of the first thermal bulb 21, the second thermal bulb 22, the third thermal bulb 23 and the fourth thermal bulb 24 are all larger than or equal to a first preset temperature or not, if so, entering S709, and if not, continuously and repeatedly judging.
S709, the second indoor heat exchanger 12 exits defrosting and enters the first cooling sub-mode.
S710, the second cooling sub-mode is performed, and the first indoor heat exchanger 11 is used to perform cooling.
And S711, judging whether the defrosting condition is met, if so, entering S712, and if not, continuously judging whether the defrosting condition is met.
S712, the first indoor heat exchanger 11 enters a defrosting mode.
S713, judging whether a defrosting exit condition is met or not or judging whether the temperatures of the first thermal bulb 21, the second thermal bulb 22, the third thermal bulb 23 and the fourth thermal bulb 24 are all larger than or equal to a first preset temperature or not, if yes, entering S714, and if not, continuing to repeatedly judge.
And S714, the first indoor heat exchanger 11 exits defrosting and enters a second refrigeration sub-mode.
In the defrosting mode, if the first indoor heat exchanger 11 meets the defrosting condition, the four-way valve 3 is switched (the ports D and E are connected) to defrost, the first indoor heat exchanger 11 is used as a condenser, the refrigerant flowing out of the outdoor unit enters the first indoor heat exchanger 11 through the first electromagnetic valve 8, and the refrigerant flowing out of the first indoor heat exchanger 11 sequentially returns to the outdoor unit through the first electronic expansion valve 7 and the first three-way valve 13.
If the second indoor heat exchanger 12 enters the first refrigeration sub-mode to start refrigeration, that is, the first indoor heat exchanger 11 meets the defrosting condition, and the second indoor heat exchanger 12 meets the refrigeration condition, at this time, the four-way valve 3 (the connection ports D and C) is restored, the refrigerant discharged from the compressor 1 enters the outdoor heat exchanger 4 through the four-way valve 3, the refrigerant flowing out of the outdoor unit enters the first indoor heat exchanger 11 through the first three-way valve 13, the refrigerant flowing out of the first indoor heat exchanger 11 sequentially passes through the second three-way valve 14 and the second electronic expansion valve 9 and then enters the second indoor heat exchanger 12, and the refrigerant flowing out of the second indoor heat exchanger 12 returns to the outdoor unit through the second electromagnetic valve 10. That is, the first indoor heat exchanger 11 functions as a condenser to dissipate heat and defrost, and the second indoor heat exchanger 12 functions as an evaporator to cool.
In the defrosting mode, if the second indoor heat exchanger 12 meets the defrosting condition, the four-way valve 3 is switched (the ports D and E are connected) to defrost, the second indoor heat exchanger 12 is used as a condenser, the refrigerant flowing out of the outdoor unit enters the second indoor heat exchanger 12 through the second electromagnetic valve 10, and the refrigerant flowing out of the second indoor heat exchanger 12 returns to the outdoor unit through the second electronic expansion valve 9 and the second three-way valve 14 in sequence.
If the first indoor heat exchanger 11 enters the second refrigeration sub-mode to start refrigeration, that is, the second indoor heat exchanger 12 meets the defrosting condition, and the first indoor heat exchanger 11 meets the refrigeration condition, at this time, the four-way valve 3 (the ports D and E are connected) is controlled, the refrigerant flowing out of the outdoor unit enters the second indoor heat exchanger 12 through the second electromagnetic valve 10, the refrigerant flowing out of the second indoor heat exchanger 12 sequentially passes through the second electronic expansion valve 9 and the second three-way valve 14 and then enters the first indoor heat exchanger 11, and the refrigerant flowing out of the first indoor heat exchanger 11 returns to the outdoor unit through the first three-way valve 13. That is, the second indoor heat exchanger 12 functions as a condenser to dissipate heat and defrost, and the first indoor heat exchanger 11 functions as an evaporator to cool.
This embodiment is according to storehouse temperature change chemical control indoor heat exchanger, controls unit refrigeration and defrosting operation, guarantees that every check point temperature does not all exceed preset temperature range, utilizes control logic to realize incessant refrigeration, realizes accurate accuse temperature, maintains the temperature stability.
EXAMPLE III
Based on the same inventive concept, the present embodiment provides a refrigeration unit control device, which can be used to implement the refrigeration unit control method described in the above embodiments. The device may be implemented in software and/or hardware, and may generally be integrated into a controller of the refrigeration unit. The refrigeration unit includes an outdoor heat exchanger and at least two indoor heat exchangers.
Fig. 8 is a block diagram of a refrigeration unit control apparatus according to a third embodiment of the present invention, and as shown in fig. 8, the apparatus includes:
the determining module 81 is used for determining that an indoor heat exchanger in the refrigerating unit meets defrosting conditions and recording the indoor heat exchanger as a target heat exchanger;
the first control module 82 is used for controlling the target heat exchanger to defrost and controlling other indoor heat exchangers to refrigerate;
and the second control module 83 is used for controlling whether the target heat exchanger continues defrosting according to the indoor temperature.
Optionally, the second control module 83 includes:
the first judgment unit is used for judging whether the indoor temperature is greater than or equal to a first preset temperature or not under the condition that the defrosting exit condition is not met;
the first control unit is used for controlling the target heat exchanger to stop defrosting if the indoor temperature is greater than or equal to the first preset temperature, and recording defrosting time t1 of the target heat exchanger;
the second judging unit is used for judging whether the indoor temperature is less than or equal to a second preset temperature or not;
and the second control unit is used for controlling the target heat exchanger to continue defrosting if the indoor temperature is less than or equal to the second preset temperature, and the defrosting continuing time of the target heat exchanger does not exceed t2-t1, wherein t2 represents a preset defrosting time.
Optionally, the second control module 83 further includes: the third control unit is used for controlling the target heat exchanger to start refrigeration if the indoor temperature is higher than the second preset temperature and the defrosting stop time of the target heat exchanger is longer than or equal to the dripping time; and in the refrigeration process of the target heat exchanger, if a preset condition is met, controlling the target heat exchanger to continue defrosting, wherein the continuous defrosting time of the target heat exchanger does not exceed t2-t 1.
Optionally, each indoor heat exchanger is correspondingly provided with at least one detection point, and the detection points are used for detecting temperature. The preset condition comprises at least one of the following conditions: the temperature of any detection point corresponding to the target heat exchanger is less than or equal to the shutdown temperature; and the refrigerating operation of the target heat exchanger exceeds the preset time, and the temperature of all detection points corresponding to the target heat exchanger is less than or equal to the second preset temperature.
Optionally, the first determining unit is specifically configured to: and judging whether the temperatures of all indoor detection points are greater than or equal to the first preset temperature, and if so, determining that the indoor temperature is greater than or equal to the first preset temperature.
Optionally, the second judging unit is specifically configured to: and judging whether the temperatures of all detection points corresponding to the target heat exchanger are less than or equal to the second preset temperature, and if so, determining that the indoor temperature is less than or equal to the second preset temperature.
Optionally, the apparatus may further include:
the third control module is used for controlling the indoor heat exchanger to refrigerate according to the temperature of a detection point corresponding to the indoor heat exchanger in a refrigeration mode;
the first judgment module is used for judging whether the temperature of a detection point in a room is greater than or equal to the refrigeration compensation starting temperature or not in the process of refrigerating any indoor heat exchanger;
and the fourth control module is used for controlling the indoor heat exchanger in the non-refrigeration state to perform refrigeration compensation according to a preset rule if the indoor heat exchanger exists.
Optionally, the apparatus further comprises:
the second judgment module is used for judging whether the temperatures of all indoor detection points are less than or equal to the refrigeration compensation closing temperature in the refrigeration compensation process after controlling the indoor heat exchanger in the non-refrigeration state to perform refrigeration compensation according to the preset rule;
and the fifth control module is used for controlling the indoor heat exchanger in the refrigeration compensation state to stop refrigeration if the temperatures of all the indoor detection points are less than or equal to the refrigeration compensation closing temperature.
Optionally, the first control module 82 and the third control module each include:
the fourth control unit is used for controlling the indoor heat exchanger to start and refrigerate if the temperature of any detection point corresponding to the indoor heat exchanger is detected to be greater than or equal to the starting temperature;
and the fifth control unit is used for controlling the indoor heat exchanger to stop refrigerating if the temperature of any detection point corresponding to the indoor heat exchanger is less than or equal to the shutdown temperature.
Optionally, the apparatus may further include: and the sixth control module is used for determining that the indoor heat exchanger has a fault, and refrigerating or defrosting by using other indoor heat exchangers without faults.
The device can execute the method provided by the embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method. For technical details that are not described in detail in this embodiment, reference may be made to the method provided by the embodiment of the present invention.
Example four
The present embodiment provides a refrigeration unit, including: an outdoor heat exchanger, at least two indoor heat exchangers, and a refrigeration unit control apparatus as described in the above embodiments. This refrigerating unit can be according to indoor temperature change reasonable control room heat exchanger, controls unit refrigeration and defrosting operation, guarantees that every check point temperature all does not exceed and predetermines the temperature range, utilizes control logic to realize incessant refrigeration, realizes accurate accuse temperature, maintains the temperature stability.
EXAMPLE five
The present embodiment provides a computer-readable storage medium having stored thereon a computer program that, when executed by a processor, implements the refrigeration unit control method as described in the above embodiments.
EXAMPLE six
The present embodiment provides an electronic device, including: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to implement the refrigeration unit control method as described in the above embodiments.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (12)
1. A refrigeration unit control method, wherein the refrigeration unit includes an outdoor heat exchanger and at least two indoor heat exchangers, the method comprising:
determining that an indoor heat exchanger in the refrigerating unit meets defrosting conditions, and recording as a target heat exchanger;
controlling the target heat exchanger to defrost, and controlling other indoor heat exchangers to refrigerate;
and controlling whether the target heat exchanger continues defrosting or not according to the indoor temperature.
2. The method of claim 1, wherein controlling whether defrosting of the target heat exchanger continues according to the indoor temperature comprises:
under the condition that the defrosting exit condition is not met, judging whether the indoor temperature is greater than or equal to a first preset temperature or not;
if the indoor temperature is greater than or equal to the first preset temperature, controlling the target heat exchanger to stop defrosting, and recording the defrosting time t1 of the target heat exchanger;
judging whether the indoor temperature is less than or equal to a second preset temperature;
and if the indoor temperature is less than or equal to the second preset temperature, controlling the target heat exchanger to continue defrosting, wherein the defrosting continuing time of the target heat exchanger does not exceed t2-t1, and t2 represents a preset defrosting time.
3. The method of claim 2, after determining whether the indoor temperature is less than or equal to a second preset temperature, further comprising:
if the indoor temperature is higher than the second preset temperature and the defrosting stop time of the target heat exchanger is longer than or equal to the dripping time, controlling the target heat exchanger to start refrigerating;
and in the refrigeration process of the target heat exchanger, if a preset condition is met, controlling the target heat exchanger to continue defrosting, wherein the continuous defrosting time of the target heat exchanger does not exceed t2-t 1.
4. The method according to claim 3, wherein each indoor heat exchanger is correspondingly provided with at least one detection point for detecting temperature;
the preset condition comprises at least one of the following conditions:
the temperature of any detection point corresponding to the target heat exchanger is less than or equal to the shutdown temperature;
and the refrigerating operation of the target heat exchanger exceeds the preset time, and the temperature of all detection points corresponding to the target heat exchanger is less than or equal to the second preset temperature.
5. The method of claim 2, wherein determining whether the indoor temperature is greater than or equal to a first predetermined temperature comprises: judging whether the temperatures of all indoor detection points are greater than or equal to the first preset temperature, and if so, determining that the indoor temperature is greater than or equal to the first preset temperature;
judging whether the indoor temperature is less than or equal to a second preset temperature or not, including: and judging whether the temperatures of all detection points corresponding to the target heat exchanger are less than or equal to the second preset temperature, and if so, determining that the indoor temperature is less than or equal to the second preset temperature.
6. The method of claim 1, further comprising:
in a refrigeration mode, controlling the indoor heat exchanger to refrigerate according to the temperature of a detection point corresponding to the indoor heat exchanger;
in the process of refrigerating any indoor heat exchanger, judging whether the temperature of a detection point in a room is greater than or equal to the refrigerating compensation starting temperature;
and if the indoor heat exchanger exists, controlling the indoor heat exchanger in the non-refrigeration state to perform refrigeration compensation according to a preset rule.
7. The method as claimed in claim 6, wherein after controlling the indoor heat exchanger in the non-cooling state to perform the cooling compensation according to the preset rule, the method further comprises:
in the process of refrigeration compensation, judging whether the temperatures of all detection points in the room are less than or equal to the refrigeration compensation closing temperature;
and if the temperature of all the indoor detection points is less than or equal to the refrigeration compensation closing temperature, controlling the indoor heat exchanger in the refrigeration compensation state to stop refrigerating.
8. The method as claimed in claim 1 or 6, wherein controlling other indoor heat exchangers to perform refrigeration, or controlling the indoor heat exchangers to perform refrigeration according to the detection point temperatures corresponding to the indoor heat exchangers in the refrigeration mode comprises:
if any detection point temperature corresponding to the indoor heat exchanger is detected to be greater than or equal to the starting temperature, the indoor heat exchanger is controlled to start and refrigerate;
and if the temperature of any detection point corresponding to the indoor heat exchanger is less than or equal to the shutdown temperature, controlling the indoor heat exchanger to stop refrigerating.
9. The method of any one of claims 1 to 7, further comprising:
and if the indoor heat exchanger is determined to be in fault, refrigerating or defrosting by using other indoor heat exchangers without faults.
10. A refrigeration unit control apparatus, the refrigeration unit including an outdoor heat exchanger and at least two indoor heat exchangers, the apparatus comprising:
the determining module is used for determining that an indoor heat exchanger in the refrigerating unit meets defrosting conditions and recording the indoor heat exchanger as a target heat exchanger;
the first control module is used for controlling the target heat exchanger to defrost and controlling other indoor heat exchangers to refrigerate;
and the second control module is used for controlling whether the target heat exchanger continues defrosting or not according to the indoor temperature.
11. A refrigeration unit, comprising: an outdoor heat exchanger, at least two indoor heat exchangers, and the refrigeration unit control of claim 10.
12. A computer-readable storage medium, on which a computer program is stored, wherein the program, when executed by a processor, implements a refrigeration unit control method as set forth in any of claims 1-9.
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| CN113251728B (en) | 2022-05-10 |
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