CN109827358B - Cooling device, cooling system and control method - Google Patents
Cooling device, cooling system and control method Download PDFInfo
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- CN109827358B CN109827358B CN201910224231.3A CN201910224231A CN109827358B CN 109827358 B CN109827358 B CN 109827358B CN 201910224231 A CN201910224231 A CN 201910224231A CN 109827358 B CN109827358 B CN 109827358B
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- 238000001816 cooling Methods 0.000 title claims abstract description 115
- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000000110 cooling liquid Substances 0.000 claims abstract description 65
- 239000007788 liquid Substances 0.000 claims abstract description 65
- 239000007921 spray Substances 0.000 claims description 27
- 238000004891 communication Methods 0.000 claims description 5
- 238000009833 condensation Methods 0.000 abstract description 14
- 230000005494 condensation Effects 0.000 abstract description 14
- 239000000498 cooling water Substances 0.000 abstract description 14
- 239000003507 refrigerant Substances 0.000 description 39
- 239000002826 coolant Substances 0.000 description 31
- 230000017525 heat dissipation Effects 0.000 description 12
- 230000008569 process Effects 0.000 description 7
- 238000005057 refrigeration Methods 0.000 description 6
- 238000004064 recycling Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 229930195734 saturated hydrocarbon Natural products 0.000 description 1
Abstract
The application provides a cooling device, a cooling system and a control method. The cooling device comprises a controller, a liquid pump, an electric valve, a pipeline and a pressure sensor for detecting the pressure value inside the condenser. The first end of the controller is connected with the electric valve, and the second end of the controller is connected with the pressure sensor. The pipeline comprises a main pipe and a branch pipe communicated with the main pipe, and the electric valve is arranged on the branch pipe, wherein the liquid pump is connected with one end of the main pipe and is used for conveying cooling liquid through the main pipe and sprinkling the cooling liquid on the condenser; the controller is used for outputting a first control signal to the electric valve when receiving a first trigger signal output by the pressure sensor based on the pressure value, and the electric valve is used for opening the valve according to the first control signal, so that the problem that the condensation pressure in the condenser drops rapidly and cannot be started normally due to overlarge cooling water quantity when the cooling device is started in the prior art can be solved.
Description
Technical Field
The invention relates to the technical field of heat exchange, in particular to a cooling device, a cooling system and a control method.
Background
Currently, cooling systems of evaporative condensation technology typically configure a cooling water pump according to how much heat is exchanged. During the start-up of the cooling system, the compressor, condenser and other units need to start up from a low load and then slowly go to full load operation. In the prior art, in the starting process of a unit, a cooling water pump is started in a low-load operation transition stage of a condenser, so that the cooling water quantity is overlarge and is not matched with the load of the unit at present, the condensing pressure in the condenser is rapidly reduced, and the unit is easy to break down, so that the system cannot be started normally.
Disclosure of Invention
The embodiment of the application provides a cooling device, a cooling system and a control method, which can solve the problem that the normal start cannot be realized due to the rapid reduction of the condensation pressure in a condenser caused by the overlarge cooling water quantity when the cooling device is started.
In order to achieve the above objective, the technical solution provided in the embodiments of the present application is as follows:
in a first aspect, embodiments of the present application provide a cooling device, the cooling device comprising: the condenser comprises a controller, a liquid pump, an electric valve, a pipeline and a pressure sensor for detecting the pressure value in the condenser, wherein the first end of the controller is connected with the electric valve, and the second end of the controller is connected with the pressure sensor; the pipeline comprises a main pipe and a branch pipe communicated with the main pipe, and the electric valve is arranged on the branch pipe, wherein the liquid pump is connected with one end of the main pipe and is used for conveying cooling liquid through the main pipe and sprinkling the cooling liquid on the condenser; the controller is used for outputting a first control signal to the electric valve based on the pressure value detected by the pressure sensor, and the electric valve is used for opening the valve according to the first control signal. Based on this, the scheme provided in this embodiment can open the electric valve in the branch pipe during the start-up of the condenser to shunt the coolant in the main pipe, thereby reducing the flow of the coolant showered on the condenser, and after the flow of the coolant showered on the condenser is reduced, reducing the heat dissipation of the coolant to the condenser. Because the condenser can not be taken away a large amount of heat by the coolant, the condensing pressure of the inner cavity of the condenser can not be rapidly reduced, and therefore the problem that the condensing pressure in the condenser is rapidly reduced and can not be normally started due to overlarge cooling water quantity when the cooling device is started in the prior art can be solved.
With reference to the first aspect, in some optional embodiments, the cooling device further includes a condenser for cooling the refrigerant. Based on this, the cooling device can cool the refrigerant by the condenser so that the refrigerant continues to absorb heat and cool after cooling.
With reference to the first aspect, in some optional embodiments, the cooling device further comprises a compressor in communication with the condenser for compressing the refrigerant. Based on this, the cooling device can compress the refrigerant in a gaseous state or a vapor state through the compressor, so that the compressed refrigerant is convenient to condense and converge into liquid in the condenser, and the refrigerant is convenient to be reused for refrigeration.
With reference to the first aspect, in some optional embodiments, the cooling device further includes a container for containing the cooling liquid, one end of the branch pipe is in communication with the main pipe, and the other end of the branch pipe is in communication with the container, for delivering the cooling liquid split from the main pipe to the container for storage. Based on this, the cooling device stores the diverted coolant through the container, facilitating recycling of the coolant in the container for recycling.
With reference to the first aspect, in some optional embodiments, the cooling device further includes a fan for cooling the condenser, the fan is connected to the third end of the controller, and the controller is further configured to output a second control signal to the fan based on the pressure value detected by the pressure sensor, where the fan is configured to start or stop operating according to the second control signal. Based on this, cooling device can be when the pressure of condenser is too big, opens through the control fan to carry out forced air cooling heat dissipation to the condenser, can improve the heat exchange efficiency of condenser and external world, thereby make the temperature in the condenser can reduce, and then help making the pressure in the condenser resume normally.
With reference to the first aspect, in some optional embodiments, the cooling device further includes a spray head provided with a plurality of spray holes, and the liquid pump is communicated with the spray head through the main pipe, wherein the spray head is used for spraying the cooling liquid on the condenser. Based on this, cooling device can evenly spray the coolant through the shower nozzle for the coolant on condenser surface can take heat away evenly, thereby realizes the heat dissipation evenly. In addition, the spray head can enlarge the spray area for spraying the cooling liquid, can more comprehensively spray the cooling liquid to the surface of the condenser, and is beneficial to increasing the area of the cooling liquid covered on the surface of the condenser, so that the heat exchange efficiency of the condenser and the outside is improved.
With reference to the first aspect, in some optional embodiments, the controller is further configured to output a third control signal to the electric valve based on the pressure value detected by the pressure sensor, where the electric valve is configured to close its own valve according to the third control signal. Based on this, cooling device can close the valve of the motorised valve on the branch pipe after the condenser steady operation to make all coolant liquid shower in the person in charge to the condenser, increase coolant liquid and to the heat dissipation power of condenser, help making coolant liquid to the load phase-match of condenser heat dissipation power and condenser, thereby avoid the condenser to lead to the pressure value in the condenser too big because of the heat that needs to dispel is big and actual heat dissipation power is low after steady operation.
With reference to the first aspect, in some optional embodiments, the liquid pump is connected to a fourth end of the controller, and the controller is further configured to output a fourth control signal to the liquid pump based on the pressure value detected by the pressure sensor, and the liquid pump is configured to start or stop operating according to the fourth control signal. Based on this, the cooling device can start the liquid pump according to the requirement, so that the condenser can normally operate.
With reference to the first aspect, in some optional embodiments, the number of the branch pipes is plural, and plural branch pipes are used to split the cooling liquid in the main pipe respectively. Based on this, cooling device can shunt the coolant liquid in the main pipe according to the demand to make the heat dissipation power to the condenser match with the load of condenser, thereby make the condenser can normal operating.
In a second aspect, an embodiment of the present application further provides a cooling system, including a power supply device and the cooling device, where the power supply device is connected with a controller, a liquid pump, and an electric valve in the cooling device, and is used for supplying power to the cooling device.
In a third aspect, an embodiment of the present application further provides a control method, which is applied to the cooling device, where the method includes:
when the pressure value in the condenser is larger than or equal to a first preset threshold value, controlling a liquid pump to be started, so that the liquid pump sprays cooling liquid to the condenser through a pipeline;
when the pressure value is smaller than or equal to a second preset threshold value, the electric valve is controlled to open the valve of the electric valve, so that the branch pipe branches the cooling liquid in the main pipe, wherein the second preset threshold value is smaller than the first preset threshold value. Based on the above, the method provided by the embodiment can control the heat exchange amount of the condenser based on the pressure value in the condenser, and can open the electric valve in the branch pipe to split the cooling liquid in the main pipe during the working period of the condenser, so that the flow of the cooling liquid sprayed on the condenser is reduced, after the flow of the cooling liquid sprayed on the condenser is reduced, the heat exchange amount of the cooling liquid on the condenser is reduced, the condensation pressure is prevented from being too low, and the problem that the condensation pressure in the condenser is rapidly reduced and cannot be started normally due to the too large cooling water amount when the cooling system is started in the prior art is solved.
With reference to the third aspect, in some optional embodiments, the method further includes:
and when the pressure value is greater than or equal to a third preset threshold value, controlling the fan to start to operate so as to radiate the condenser, wherein the third preset threshold value is greater than the first preset threshold value.
With reference to the third aspect, in some optional embodiments, the method further includes:
and when the pressure value is smaller than the third preset threshold value, controlling the fan to stop running.
With reference to the third aspect, in some optional embodiments, the method further includes:
and when the pressure value is larger than the second preset threshold value, controlling the electric valve to close the valve of the electric valve.
In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below. It is to be understood that the following drawings illustrate only certain embodiments of the present application and are therefore not to be considered limiting of its scope, for the person of ordinary skill in the art may derive other relevant drawings from the drawings without inventive effort.
Fig. 1 is a schematic block diagram of a cooling device according to an embodiment of the present application.
Fig. 2 is a second schematic block diagram of a cooling device according to an embodiment of the present application.
Fig. 3 is a block diagram of a cooling device according to an embodiment of the present disclosure.
Fig. 4 is a block schematic diagram of a cooling system according to an embodiment of the present application.
Fig. 5 is a schematic flow chart of a control method according to an embodiment of the present application.
Icon: 10-a cooling system; 100-cooling means; 110-a controller; 120-liquid pump; 130-an electric valve; 140-a pressure sensor; 151-a main pipe; 152-branch pipes; 160-fans; 170-a condenser; 180-container; 190-spray head; 200-power supply device.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
In the description of the present application, the terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.
Currently, cooling systems of evaporative condensation technology typically configure a cooling water pump according to how much heat is exchanged. During the start-up of the cooling system, the compressor, condenser and other units need to start up from a low load and then slowly go to full load operation. In the prior art, in the starting process of a unit, a cooling water pump is started in a low-load operation transition stage of a condenser, so that the cooling water quantity is overlarge and is not matched with the load of the unit at present, the condensing pressure in the condenser is rapidly reduced, and the unit is easy to break down, so that the system cannot be started normally.
In the immediately starting stage of the cooling system, the working condition of the refrigerant in the condenser (such as the flow rate in the condenser, the flow rate in unit time length, and the like, wherein the unit time length can be one second or one minute, and the flow rate is the volume of the refrigerant) is easy to fluctuate greatly.
In view of the above problems, the applicant of the present application has studied for a long time and has proposed the following examples to solve the above problems. Embodiments of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.
Referring to fig. 1, 2 and 3, a cooling device 100 is provided in an embodiment of the present application, which can cool a condenser 170. The cooling device 100 may be applied to an air conditioner to achieve temperature adjustment. In this embodiment, the cooling apparatus 100 may include: a controller 110, a liquid pump 120, an electric valve 130, a pipe, and a pressure sensor 140 for detecting a pressure value inside the condenser 170. A first end of the controller 110 is connected to the electric valve 130, and a second end of the controller 110 is connected to the pressure sensor 140.
The pipe may include a main pipe 151 and a branch pipe 152 communicating with the main pipe 151, and the electric valve 130 is provided on the branch pipe 152. The liquid pump 120 is connected to one end of the main pipe 151, and is used for delivering cooling liquid through the main pipe 151 and spraying the cooling liquid on the condenser 170; the controller 110 is configured to output a first control signal to the electric valve 130 based on the pressure value detected by the pressure sensor 140, and the electric valve 130 is configured to open its own valve according to the first control signal. The first control signal may be a control signal generated by the controller 110 when the pressure value acquired by the pressure sensor 140 is less than or equal to a second preset threshold. The first trigger signal may be a current signal or a voltage signal that characterizes a particular pressure value. The cooling liquid includes, but is not limited to, cooling water and cooling oil.
It will be appreciated that the first flow rate of the coolant delivered by the liquid pump 120 in this embodiment is the same as or similar to the second flow rate of the coolant delivered by the water pump of the prior art refrigeration system in the same unit time. For example, the first flow rate of the coolant delivered by the liquid pump 120 in one minute is the same as or similar to the second flow rate of the coolant delivered by the water pump in the prior art in one minute, where the unit time period may be determined according to the actual situation. Compared with the prior art, the solution provided in this embodiment can open the electric valve 130 in the branch pipe 152 during the start-up of the cooling device 100 to split the cooling liquid in the main pipe 151, so that the flow rate of the cooling liquid showering on the condenser 170 is reduced, and after the flow rate of the cooling liquid showering on the condenser 170 is reduced, the heat exchange amount of the cooling liquid on the condenser 170 is reduced. Since the condenser 170 does not take a large amount of heat away by the cooling liquid, the condensation pressure in the condenser 170 will not drop rapidly, so that the problem that the condensation pressure in the condenser 170 drops rapidly and cannot be started normally due to the excessive cooling water amount when the cooling device 100 is started in the prior art can be solved.
It will be appreciated that a condenser 170 is typically provided with a condenser tube, typically pre-filled (e.g., primed) with refrigerant. The refrigerant may be, but is not limited to, freon, saturated hydrocarbon, and the like. The pressure sensor 140 may detect the pressure in the condenser tube. Generally, in a refrigeration system, a refrigerant is compressed by a compressor in a gaseous or vapor state, the compressed refrigerant is cooled by a condenser 170, and the cooled refrigerant is generally converged into a liquid refrigerant and then flows to an evaporator under the pushing of internal pressure; the liquid refrigerant absorbs external heat (such as air refrigeration) in the evaporator, and at the moment, the liquid refrigerant evaporates into a gaseous state or is in a vapor state and then flows to the compressor; the compressor compresses the delivered refrigerant in a gaseous state or a vapor state, thereby realizing the recycling of the refrigerant. In the evaporative condensation technology, it is generally necessary to cool the refrigerant by a coolant when the condenser 170 cools the refrigerant.
The cooling device 100 provided by the embodiment of the application can be applied to the technical field of evaporative condensation, and can control the pressure of the condenser 170 based on the pressure value acquired by the pressure sensor 140, so as to avoid overlarge pressure or overlarge pressure in the condenser 170.
Specifically, during the initial operation of the condenser 170, the pressure sensor 140 is used to detect the exhaust pressure in the condenser 170 (i.e., the internal pressure value of the condenser 170), and then generate a pressure signal corresponding to the pressure value. The controller 110 may implement cooling control of the condenser 170 based on the pressure signal such that the amount of heat exchange to the condenser 170 matches the actual amount of heat exchange required by the condenser 170.
For example, upon activation of the condenser 170, the controller 110 controls the liquid pump 120 to start operating when the value of the discharge pressure is greater than or equal to a first preset threshold. When the value of the exhaust pressure is less than or equal to the second preset threshold, the controller 110 controls the electric valve 130 to open its own valve, so that the branch pipe 152 branches the cooling liquid in the main pipe 151, where the second preset threshold is less than the first preset threshold, and the first preset threshold and the second preset threshold may be set according to the actual situation, and are not limited specifically herein.
For ease of understanding, the following describes in detail the relationship between the control signal and the preset threshold:
each preset threshold can be set according to actual conditions, wherein the fourth preset threshold is smaller than the second preset threshold, the second preset threshold is smaller than the first preset threshold, and the first preset threshold is smaller than the third preset threshold;
when the pressure value inside the condenser 170 is greater than or equal to the first preset threshold value, the controller 110 may generate a fourth control signal for controlling the liquid pump 120 to start operating;
when the pressure value inside the condenser 170 is less than the fourth preset threshold value, the controller 110 may generate a fourth control signal for controlling the liquid pump 120 to stop operating, wherein the fourth control signal for controlling the liquid pump 120 to stop operating and the fourth control signal for controlling the liquid pump 120 to start operating are generally two different (level) control signals;
when the pressure value inside the condenser 170 is less than or equal to the second preset threshold value, the controller 110 may generate a first control signal for controlling the electric valve 130 to open its own valve;
when the pressure value inside the condenser 170 is greater than or equal to the third preset threshold value, the controller 110 may generate a second control signal for controlling the blower 160 to start operating;
when the pressure value inside the condenser 170 is less than the third preset threshold value, the controller 110 may generate a second control signal for controlling the fan 160 to stop operating, wherein the second control signal for the fan 160 to start operating and the second control signal for the fan 160 to stop operating are generally two different (level) control signals;
when the pressure value inside the condenser 170 is greater than the second preset threshold value, the controller 110 may generate a third control signal for controlling the electric valve 130 to close its own valve.
In this embodiment, when the condenser 170 is just started, the internal temperature of the condenser 170 is low, and the exhaust pressure is low, and at this time, the exhaust pressure needs to be continuously increased until the first preset threshold value, and during the process of increasing the exhaust pressure, the condenser 170 does not need to be cooled. Because if the condenser 170 is started to cool the condenser 170, the temperature inside the condenser 170 is reduced, the volume of the refrigerant is reduced after the temperature is reduced, so that the discharge pressure is reduced, and the discharge pressure cannot continuously rise to reach the first preset value. The solution may avoid the above problem by not starting the liquid pump 120 when the condenser 170 is just started, and not starting the liquid pump 120 until the value of the exhaust pressure rises to reach or exceed the first preset threshold value, so as to cool the condenser 170.
After the liquid pump 120 is started, the liquid pump 120 delivers the cooling liquid to the condenser 170 through the main pipe 151, and the delivered cooling liquid is sprayed on the surface of the condenser 170, so that heat of the condenser 170 can be taken away through the flowing cooling liquid, and the temperature of the condenser 170 is prevented from continuously increasing or decreasing. If the cooling capacity of the condenser 170 is too high during this period, that is, when the exhaust pressure of the condenser 170 is less than or equal to the second preset threshold value after the liquid pump 120 is turned on to perform liquid cooling, the cooling capacity of the condenser 170 needs to be reduced (which may be understood as reducing the heat exchange efficiency of the cooling liquid to the condenser 170), at this time, the valve of the electric valve 130 on the branch pipe 152 may be controlled by the controller 110 to open so that the branch pipe 152 can shunt the cooling liquid in the main pipe 151, so that the flow rate of the cooling liquid sprayed on the condenser 170 by the main pipe 151 in a unit time period is reduced, and after the flow rate of the cooling liquid is reduced, the heat taken away from the condenser 170 is reduced, so that the exhaust pressure of the condenser 170 can be raised to a normal threshold range, which may be set according to practical situations, and is not particularly limited herein.
In general, when the branch pipe 152 does not branch the coolant in the main pipe 151, the flow rate of the coolant in the main pipe 151 can be matched with the heat exchange amount of the condenser 170 in the case of full load (full load is understood as the load when the condenser 170 is stably operated). The applicant has found that when the amount of heat exchange of the cooling device 100 matches the amount of heat exchange at full load, if the flow rate per unit time of the coolant in the main pipe 151 decreases, the temperature of the condenser 170 generally increases, and the exhaust pressure increases. Therefore, if the discharge pressure of the condenser 170 is too low after the liquid pump 120 is started, the discharge pressure of the condenser 170 can be raised back and forth by reducing the flow rate of the coolant showering on the condenser 170 for a unit time.
As an alternative embodiment, the cooling device 100 further includes a condenser 170 for cooling the refrigerant.
As can be appreciated, the cooling device 100 can cool the refrigerant by the condenser 170, and can cool and liquefy the refrigerant in a high-temperature and high-pressure state (in which the refrigerant is generally in a gaseous state or a vapor state) to form a low-temperature and low-pressure refrigerant (in which the refrigerant is generally in a liquid state), so that the refrigerant after cooling and liquefaction can absorb heat and refrigerate.
As an alternative embodiment, the cooling apparatus 100 further includes a compressor in communication with the condenser 170 for compressing a refrigerant.
In the present embodiment, the cooling apparatus 100 is capable of compressing a refrigerant in a gaseous or vapor state by a compressor, so that the compressed refrigerant is conveniently condensed into a liquid in the condenser 170, so that the refrigerant can be reused for refrigeration. In addition, the compressor may also power the circulating flow of refrigerant in the drive condenser 170.
It will be appreciated that if the refrigerant in the gaseous or vapor state is not compressed, the internal air pressure is reduced after the condenser 170 cools the refrigerant in the gaseous or vapor state, so that the discharge pressure is insufficient to circulate the refrigerant, and the entire refrigeration system cannot be operated. The compressor provided by the embodiment can compress the refrigerant in a gaseous state or a vapor state, so that the compressed refrigerant can continue to flow with redundant power even after being cooled.
As an alternative embodiment, the cooling device 100 further comprises a container 180 for containing a cooling liquid. One end of the branch pipe 152 is communicated with the main pipe 151, and the other end of the branch pipe 152 is communicated with the container 180 for delivering the coolant branched from the main pipe 151 to the container 180 for storage. Based on this, the cooling device 100 stores the diverted coolant through the container 180, facilitating recycling of the coolant in the container 180 for recycling.
As an alternative embodiment, the liquid pump 120 may draw the cooling liquid from the container 180 through a pipe, then convey it through the main pipe 151, and then shower the conveyed cooling liquid on the surface of the condenser 170. Wherein the cooling liquid showered on the surface of the condenser 170 may flow back into the container 180.
The principle of the cooling liquid reflux can be as follows: for example, the condenser 170 is disposed at the top of the container 180, and a through hole is formed at the top of the container 180, so that the cooling sprayed on the surface of the condenser 170 can flow back into the container 180, wherein the area of the top of the container 180 can be larger than the area of the plane of the top of the condenser 170 projected onto, so that the sprayed cooling liquid can flow back into the container 180 as completely as possible, and the cooling liquid can be recycled.
As an alternative embodiment, the cooling device 100 further comprises a fan 160 for cooling the condenser 170. The fan 160 is connected to the third terminal of the controller 110, and the controller 110 is further configured to output a second control signal to the fan 160 based on the pressure value detected by the pressure sensor 140, where the fan 160 is configured to start or stop operating according to the second control signal.
As can be appreciated, when the controller 110 detects that the pressure value inside the condenser 170 in the condenser 170 is excessively large through the pressure sensor 140, the fan 160 is controlled to start to perform air cooling on the condenser 170, thereby reducing the exhaust pressure inside the condenser 170. For example, the controller 110 detects that the pressure value is greater than or equal to a third preset threshold value through the pressure sensor 140, generates a second control signal for starting the blower 160, and transmits the second control signal to the blower 160. Upon receiving the second control signal, the blower 160 is started to enhance the cooling effect on the condenser 170.
Based on this, when the pressure of the condenser 170 is too high, the cooling device 100 can control the fan 160 to be turned on so as to perform air cooling and heat dissipation on the condenser 170, so that the heat exchange efficiency between the condenser 170 and the outside can be improved, the temperature in the condenser 170 can be reduced, and the pressure in the condenser 170 can be recovered to be normal.
Optionally, after the controller 110 detects that the pressure value is smaller than the second preset threshold value through the pressure sensor 140, it means that heat dissipation to the condenser 170 through the fan 160 is not needed at this time. At this point, the controller 110 may generate a second control signal for turning off the blower 160, and the blower 160 may cease operation upon receiving the second control signal indicative of turning off the blower 160.
As an alternative embodiment, the cooling device 100 further includes a spray head 190 provided with a plurality of spray holes, and the liquid pump 120 is communicated with the spray head 190 through the main pipe 151, wherein the spray head 190 is used to spray the cooling liquid on the condenser 170. Based on this, the cooling device 100 can uniformly spray the cooling liquid through the spray head 190, so that the cooling liquid on the surface of the condenser 170 can uniformly take away heat, thereby uniformly achieving heat dissipation. In addition, the spray head 190 can enlarge the spray area of the sprayed cooling liquid, can spray the cooling liquid to the surface of the condenser 170 more comprehensively, and is beneficial to increasing the area of the cooling liquid covered on the surface of the condenser 170, thereby improving the heat exchange efficiency between the condenser 170 and the outside.
As an alternative embodiment, the controller 110 is further configured to output a third control signal to the electric valve 130 based on the pressure value detected by the pressure sensor 140, and the electric valve 130 is configured to close its own valve according to the third control signal. As can be appreciated, the controller 110 may generate a third control signal for controlling the electric valve 130 to close its own valve when the pressure value inside the condenser 170 is greater than the second preset threshold value. Based on this, after the condenser 170 stably operates, the cooling device 100 may close the valve of the electric valve 130 on the branch pipe 152, so that all the cooling liquid in the main pipe 151 is sprayed to the condenser 170, increasing the heat exchange amount of the cooling liquid on the condenser 170, and helping to make the heat exchange amount of the cooling liquid on the condenser 170 match with the load of the condenser 170, so as to avoid that the actual cooling efficiency of the condenser 170 is low due to large heat required to be dissipated after the condenser 170 stably operates, thereby resulting in an excessive pressure value in the condenser 170.
As an alternative embodiment, the liquid pump 120 is connected to the fourth terminal of the controller 110, and the controller 110 is further configured to output a fourth control signal to the liquid pump 120 based on the pressure value detected by the pressure sensor 140, and the liquid pump 120 is configured to start or stop operating according to the fourth control signal. As can be appreciated, the controller 110 can generate a fourth control signal for controlling the liquid pump 120 to begin operation when the pressure value in the chamber of the condenser 170 is greater than or equal to the first preset threshold value; when the pressure value in the chamber of the condenser 170 is less than a fourth preset threshold value, which is less than the first preset threshold value, the controller 110 may generate a fourth control signal for controlling the liquid pump 120 to stop operating. Based on this, the cooling device 100 may activate the liquid pump 120 as needed to enable the condenser 170 to operate normally.
As an alternative embodiment, the number of the branch pipes 152 is plural, and the plurality of branch pipes 152 are used to branch the coolant in the main pipe 151, respectively. Based on this, the cooling device 100 may split the cooling liquid in the main pipe 151 according to the need so that the amount of heat exchange to the condenser 170 matches the load of the condenser 170, thereby enabling the condenser 170 to operate normally.
It should be noted that the control signal (refer to any one of the first control signal to the fourth control signal) may be a level signal, such as a high level signal or a low level signal. The control signal may be a current signal corresponding to a current value or a voltage signal corresponding to a voltage value. Wherein when the pressure values are different, the control signals are also different. For example, for a current signal, the greater the pressure value, the greater the current value of the current signal. When the pressure value is at each preset threshold (the first preset threshold to the third preset threshold), the corresponding current signals are three different current values respectively. Similarly, when the control signal is a voltage signal, the control signal is similar to a current signal, and will not be described herein.
The pressure signal may be one current signal corresponding to a current value or one voltage signal corresponding to a voltage value. In general, the pressure value is linearly related to the current value of the current signal or the voltage value of the voltage signal, that is, the pressure value can be determined by detecting the magnitude of the current value or the voltage value.
In this embodiment, the controller 110 may be an integrated circuit chip with signal processing capability. The controller 110 may be a general purpose processor. For example, the processor may be a central processing unit (Central Processing Unit, CPU), digital Signal Processor (DSP), application Specific Integrated Circuit (ASIC), field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present application. For example, the controller 110 may be an STM32 series single-chip microcomputer.
Referring to fig. 4, a cooling system 10 is also provided in an embodiment of the present application. The cooling system 10 may include the power supply apparatus 200 and the cooling device 100 described above. The power supply device 200 is connected with the controller 110, the liquid pump 120 and the electric valve 130 in the cooling apparatus 100, and is used for supplying power to the cooling apparatus 100 so that the cooling apparatus 100 can normally operate. The power supply device 200 may be a battery module formed by connecting a plurality of unit batteries in series, parallel or a combination of series and parallel, or be a generator set (such as a diesel generator). The unit cell may be, but is not limited to, a lithium ion battery, a lead storage battery, or the like.
Alternatively, the cooling device 100 may be connected to a utility grid, which supplies the cooling device 100 with power.
Referring to fig. 5, the embodiment of the present application further provides a control method applied to the cooling device 100. The steps of the control method are performed or implemented by the cooling device 100. The method may include:
step S310, when the pressure value in the condenser 170 is greater than or equal to a first preset threshold value, controlling the liquid pump 120 to be started, so that the liquid pump 120 sprays cooling liquid to the condenser 170 through a pipeline;
in step S320, when the pressure value is less than or equal to the second preset threshold, the electric valve 130 is controlled to open its own valve, so that the branch pipe 152 branches the cooling liquid in the main pipe 151, where the second preset threshold is less than the first preset threshold.
It is to be understood that, for convenience and brevity of description, the specific working process of the control method described above may refer to the corresponding control process of each controller 110 in the cooling device 100, and will not be described in detail herein.
Based on this, the method provided in this embodiment can control the heat exchange amount of the condenser 170 based on the pressure value in the condenser 170, and can open the electric valve 130 in the branch pipe 152 to split the cooling liquid in the main pipe 151 when the cooling device 100 is started, so that the flow of the cooling liquid showered on the condenser 170 is reduced, and after the flow of the cooling liquid showered on the condenser 170 is reduced, the heat dissipation amount of the cooling liquid on the condenser 170 is reduced, so as to avoid the problem that the condensation pressure is excessively low, and thus the cooling device 100 in the prior art cannot be started normally due to the rapid decrease of the condensation pressure in the condenser 170 caused by the excessive cooling water amount when the cooling device 100 is started.
As an alternative embodiment, the method may further comprise: when the pressure value is greater than or equal to a third preset threshold, the fan 160 is controlled to start to operate so as to radiate heat from the condenser 170, wherein the third preset threshold is greater than the first preset threshold.
As an alternative embodiment, the method may further comprise: when the pressure value is less than the third preset threshold value, the fan 160 is controlled to stop operating.
As an alternative embodiment, the method may further comprise: when the pressure value is greater than the second preset threshold value, the electric valve 130 is controlled to close the valve.
It should be noted that, for convenience and brevity of description, the specific working process of the control method described above may refer to the corresponding control process of each controller 110 in the cooling device 100, and will not be described in detail herein.
In summary, the present application provides a cooling device, a cooling system and a control method. The cooling device comprises a controller, a liquid pump, an electric valve, a pipeline and a pressure sensor for detecting the pressure value in the cavity of the condenser. The first end of the controller is connected with the electric valve, and the second end of the controller is connected with the pressure sensor. The pipeline comprises a main pipe and a branch pipe communicated with the main pipe, and the electric valve is arranged on the branch pipe, wherein the liquid pump is connected with one end of the main pipe and is used for conveying cooling liquid through the main pipe and sprinkling the cooling liquid on the condenser; the controller is used for outputting a first control signal to the electric valve when receiving a first trigger signal output by the pressure sensor based on the pressure value, and the electric valve is used for opening the valve according to the first control signal. Based on this, the scheme that this embodiment provided can be when cooling device starts, opens the motorised valve in the branch pipe to shunt the coolant liquid in the main pipe, thereby make the flow of the coolant liquid of shower on the condenser reduce, after the flow of the coolant liquid of shower to the condenser reduces, just can reduce the heat dissipation capacity of coolant liquid to the condenser. Because the condenser can not be taken away a large amount of heat by the coolant, the condensation pressure in the condenser can not drop rapidly, so the problem that the condensation pressure in the condenser drops rapidly and cannot be started normally due to overlarge cooling water quantity when the cooling device is started in the prior art can be solved.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims (9)
1. A cooling device, characterized in that the cooling device comprises: the system comprises a controller, a liquid pump, an electric valve, a pipeline and a pressure sensor for detecting the internal pressure value of a condenser, wherein the first end of the controller is connected with the electric valve, and the second end of the controller is connected with the pressure sensor;
the pipeline comprises a main pipe and a branch pipe communicated with the main pipe, and the electric valve is arranged on the branch pipe, wherein the liquid pump is connected with one end of the main pipe and is used for conveying cooling liquid through the main pipe and sprinkling the cooling liquid on the condenser; the controller is used for outputting a first control signal to the electric valve based on the pressure value detected by the pressure sensor, and the electric valve is used for opening a valve of the electric valve according to the first control signal;
the cooling device further comprises a container for containing the cooling liquid, the container is arranged below the condenser, one end of the branch pipe is communicated with the main pipe, the other end of the branch pipe is communicated with the container, and the cooling liquid split from the main pipe is conveyed to the container for storage.
2. The cooling device according to claim 1, further comprising a fan for cooling the condenser, the fan being connected to a third end of the controller, the controller further being configured to output a second control signal to the fan based on the pressure value detected by the pressure sensor, the fan being configured to start operation or stop operation according to the second control signal.
3. The cooling device of claim 1, further comprising a spray head provided with a plurality of spray holes, the liquid pump being in communication with the spray head through the main pipe, wherein the spray head is configured to spray the cooling liquid onto the condenser.
4. A cooling device according to any one of claims 1-3, wherein the liquid pump is connected to a fourth terminal of the controller, the controller being further adapted to output a fourth control signal to the liquid pump based on the pressure value detected by the pressure sensor, the liquid pump being adapted to start or stop operation in accordance with the fourth control signal.
5. A cooling system comprising a power supply device and a cooling apparatus according to any one of claims 1-4, said power supply device being connected to a controller, a liquid pump, an electrically operated valve in said cooling apparatus for powering said cooling apparatus.
6. A control method, characterized by being applied to the cooling apparatus according to any one of claims 1 to 4, comprising:
when the internal pressure value of the condenser is larger than or equal to a first preset threshold value, controlling a liquid pump to be started, so that the liquid pump sprays cooling liquid to the condenser through a pipeline;
when the pressure value is smaller than or equal to a second preset threshold value, the electric valve is controlled to open the valve of the electric valve, so that the branch pipe branches the cooling liquid in the main pipe, wherein the second preset threshold value is smaller than the first preset threshold value.
7. The method of claim 6, wherein the method further comprises:
and when the pressure value is greater than or equal to a third preset threshold value, controlling the fan to start to operate so as to radiate the condenser, wherein the third preset threshold value is greater than the first preset threshold value.
8. The method of claim 6, wherein the method further comprises:
and when the pressure value is smaller than a third preset threshold value, controlling the fan to stop running.
9. The method of claim 6, wherein the method further comprises:
and when the pressure value is larger than the second preset threshold value, controlling the electric valve to close the valve of the electric valve.
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