CN105571212A - Refrigerating unit, pressure control method and refrigerator car - Google Patents
Refrigerating unit, pressure control method and refrigerator car Download PDFInfo
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- CN105571212A CN105571212A CN201510964991.XA CN201510964991A CN105571212A CN 105571212 A CN105571212 A CN 105571212A CN 201510964991 A CN201510964991 A CN 201510964991A CN 105571212 A CN105571212 A CN 105571212A
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- water
- spray
- condenser
- refrigerant pressure
- liquid level
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/04—Condensers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/04—Details of condensers
- F25B2339/047—Water-cooled condensers
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention aims at providing a refrigerating unit, a pressure control method for the refrigerating unit and a refrigerator car and mainly aims at solving the problem of high-pressure protective shutdown of the refrigerating unit. The pressure of a refrigerant in a condenser is controlled through spraying water on the condenser by using a spraying device. The refrigerating unit comprises a refrigerating loop, a water storage tank, a spraying device, a pressure sensor and a controller, wherein the refrigerating loop comprises a condenser; the spraying device is connected with the water storage tank through a pipeline and is used for spraying water into the condenser; the pressure sensor and the spraying device are both connected with the controller; the pressure sensor is used for acquiring the pressure P of a refrigerant in the condenser; and the controller is used for controlling the spraying device to spray water according to the pressure P of the refrigerant. The pressure control method provided by the invention is used for controlling the spraying device to spray water according to the pressure P of the refrigerant. Through spraying water into the condenser, the problem of high-pressure protective shutdown of the refrigerating unit can be effectively reduced.
Description
Technical field
The present invention relates to refrigerating equipment field, be specifically related to a kind of refrigeration unit and compress control method and refrigerator car.
Background technology
In refrigerating transport vehicle refrigeration unit is run, when compressor rotary speed is higher, when ambient temperature is higher, system pressure is higher, easily triggers high-voltage switch gear protection and shuts down.Especially on refrigerated transportation vehicle low-grade location during abrupt slope; now engine speed is very high; corresponding compressor rotary speed is also very high; and the speed of a motor vehicle is lower; the heat transfer effect of condenser side is bad, frequently can occur the phenomenon that high voltage protective is shut down, and causes temperature in refrigerator carriage to occur fluctuation; affect the quality of REFC, also affect the reliability of refrigeration unit simultaneously.
Summary of the invention
In view of this, the object of the present invention is to provide one can regulate refrigerant pressure in condenser by water spray, the refrigeration unit preventing high voltage protective from shutting down and compress control method and refrigerator car.
For reaching this object, the present invention by the following technical solutions:
A kind of refrigeration unit, comprise refrigerating circuit, described refrigerating circuit comprises condenser; Also comprise storage tank and spray equipment, described spray equipment is connected for being sprayed water to condenser with storage tank by pipeline; Also comprise pressure sensor and controller, described pressure sensor is all connected with described controller with described spray equipment; Described pressure sensor is for obtaining refrigerant pressure P in described condenser; Described controller is used for controlling described spray equipment water spray according to described refrigerant pressure P.
Preferably, in aforesaid refrigeration unit, also comprise water-collecting tray, described water-collecting tray is arranged on the below of described condenser, and connects described storage tank by pipeline.
Preferably, in aforesaid refrigeration unit, also comprise liquid level sensor, described liquid level sensor is connected with described controller, for obtaining the liquid level H in described storage tank; Described controller is used for controlling described spray equipment water spray according to described refrigerant pressure P and liquid level H.
Preferably, in aforesaid refrigeration unit, described spray equipment comprises water pump and spraying mechanism, and described water pump is connected with described control device.
A kind of refrigerator car, it comprises aforesaid refrigeration unit.
A kind of refrigeration unit compress control method, described refrigeration unit comprises refrigerating circuit, and described refrigerating circuit comprises condenser; Described refrigeration unit also comprises storage tank and spray equipment, and described spray equipment is connected for spraying water to condenser by pipeline with storage tank, and described method comprises: obtain refrigerant pressure P in described condenser; Described spray equipment water spray is controlled according to described refrigerant pressure P.
Preferably, in aforesaid refrigeration unit compress control method, described method also comprises: obtain the liquid level H in storage tank; Described spray equipment water spray is controlled according to described refrigerant pressure P and liquid level H.
Preferably, in aforesaid refrigeration unit compress control method, described method comprises: as refrigerant pressure P >=P0, and during liquid level H<H0, spray water to described condenser, wherein P0 is default refrigerant pressure threshold, and H0 is default liquid level threshold value.
Preferably, in aforesaid refrigeration unit compress control method, described method comprises: as liquid level H >=H0, spray water to described condenser.
Preferably, in aforesaid refrigeration unit compress control method, described method comprises: as liquid level H >=H0, to spray water and continue to obtain liquid level H with first flow Q1 to described condenser; When being judged as in water spray and/or when liquid level rises after water spray, increase spray flow.
Preferably, in aforesaid refrigeration unit compress control method, described method comprises: as refrigerant pressure P >=P0, to spray water and continue to obtain refrigerant pressure in described condenser with the 3rd flow Q3 to described condenser; When detecting in water spray and/or when refrigerant pressure does not decline after water spray, increase spray flow.
Preferably, in aforesaid refrigeration unit compress control method, described method comprises: as refrigerant pressure P >=P0, and during liquid level H<H0, to spray water and continue to obtain refrigerant pressure in described condenser with the 3rd flow Q3 to described condenser; When being judged as in water spray and/or when refrigerant pressure does not decline after water spray, increase spray flow.
The invention has the beneficial effects as follows:
1, this refrigeration unit is by condenser water spray, effectively reduces the pressure of refrigerant in condenser, effectively avoids the phenomenon frequently occurring that high voltage protective is shut down, and guarantees that refrigeration unit is normal, reliability service.
2, because the water be sprayed on condenser can take away a large amount of heat of condenser surface, enhance condenser heat transfer effect, reduce the temperature of condenser, the efficiency of unit operation can be promoted, save the energy.
3, when this refrigeration unit is applied to refrigerator car, in refrigerator carriage, temperature remains stable, guarantees the quality of REFC.
Accompanying drawing explanation
By referring to the description of accompanying drawing to the embodiment of the present invention, above-mentioned and other objects, features and advantages of the present invention will be more clear, in the accompanying drawings:
Fig. 1 is the composition structure chart of the embodiment one of the refrigeration unit of the application.
Fig. 2 is the flow chart of the embodiment two of the compress control method of the refrigeration unit of the application.
Fig. 3 is the flow chart of the embodiment three of the compress control method of the refrigeration unit of the application.
Detailed description of the invention
Based on embodiment, present invention is described below, but the present invention is not restricted to these embodiments.In hereafter details of the present invention being described, detailedly describe some specific detail sections.Do not have the description of these detail sections can understand the present invention completely for a person skilled in the art yet.In order to avoid obscuring essence of the present invention, known method, process, flow process, element do not describe in detail.
Embodiment one
Embodiment one relates to a kind of refrigeration unit, and specifically as shown in Figure 1, it comprises refrigerating circuit, and refrigerating circuit comprises evaporimeter 1, condenser 3; Refrigeration unit also comprises storage tank 5 and spray equipment, spray equipment comprises the water pump 7 and spraying mechanism 8 that are connected successively by pipeline and storage tank 5, water pump in storage tank 5 can be delivered to spraying mechanism 8 by water pump 7, the setting that spraying mechanism 8 is relative with condenser 3, for spraying water to condenser 3, spraying mechanism 8 is preferably arranged on the top of condensation 3, and it can comprise one or more nozzle; Refrigeration unit also comprises pressure sensor 9 and controller 10, and described pressure sensor 9 is all connected with described controller with water pump 7; Pressure sensor is for obtaining refrigerant pressure P in condenser 3; Controller 10 is for controlling water pump 7 and then controlling spray equipment water spray according to described refrigerant pressure P.When being judged as that the refrigerant pressure P in condenser is more than or equal to default refrigerant pressure threshold P0, namely during refrigerant pressure P >=P0, controller 10 can control described water pump 7 and open, and sprayed water to condenser by spraying mechanism 8, because the water be sprayed on condenser 3 can take away a large amount of heat in condenser 3 surface, enhance condenser 3 heat transfer effect, reduce the temperature of condenser 3, and then the refrigerant pressure in condenser 3 can be effectively reduced.Preferably, controller 10 can control water pump 7 and sprays water to condenser 3 with different flows.
Preferably, refrigeration unit is also included in the liquid level sensor 6 for detecting liquid level H in storage tank 5 arranged in storage tank 5, liquid level sensor 6 is connected with controller 10, and controller 10 is for controlling described spray equipment water spray according to described refrigerant pressure P and liquid level H.Concrete control method can be introduced below.
Preferably, refrigeration unit also comprises water-collecting tray 4, and described water-collecting tray 4 is arranged on the below of described condenser 3, and connects described storage tank 5 by pipeline, and water accumulating disc can be collected spray to the cooling water of condenser 3 and send storage tank 5 back to and recycle.
Preferably, refrigeration unit also comprises the drip tray 2 being located at base of evaporator, and drip tray 2 is connected with water accumulating disc 4 or storage tank 5 by pipeline, condensed water also can be collected in storage tank 5.
Refrigeration unit in the present embodiment; be provided with spray equipment; controller 10 can carry out spray cooling according to refrigerant pressure P or according to the situation control spray equipment of refrigerant pressure P and liquid level H to condenser 3; effectively can reduce the temperature of condenser 3, reduce the probability that refrigeration unit high voltage protective is shut down.
Embodiment two
Embodiment two relates to a kind of compress control method of the refrigeration unit be applied in embodiment one, and flow chart is see Fig. 2, and it specifically comprises the following steps:
Step S10, refrigeration unit start runs;
Step S11, controller 10 obtains the refrigerant pressure P in condenser 3 by pressure sensor 9;
Step S12, controller 10 judges whether refrigerant pressure P is more than or equal to P0, and wherein P0 is default refrigerant pressure threshold; If P >=P0, then forward step S13 to, otherwise, return step S11.When being judged as that refrigerant pressure P is more than or equal to refrigerant pressure threshold P0, spray cooling is performed, when refrigerant pressure P is less than refrigerant pressure threshold P0 to condenser, illustrate that refrigerant pressure P is not high, do not need water spray, can using water wisely, avoid frequently adding water to storage tank, also can avoid water pump frequent starting.
Step S13, controller 10 controls water pump and sprays water to condenser with the second flow Q2, and again obtains the refrigerant pressure P in condenser while water spray or after water spray terminates; Preferably, controller controls water pump with the second flow Q2 to the condenser water spray T3 time, and T3 is the 3rd default time threshold;
Step S14, controller judge this water spray in or water spray after refrigerant pressure compare this water spray before refrigerant pressure whether have decline; If decline, then forward step S12 to, if do not decline, then forward step S15 to.In present embodiment, said decline to refer in water spray or after water spray, refrigerant pressure is less than the refrigerant pressure before this water spray.If to be judged as in this water spray or after water spray, refrigerant pressure is more than or equal to the refrigerant pressure before this water spray, then to illustrate that this water spray does not play the effect of step-down, now forward step S15 to; If to be judged as in this water spray or after water spray, refrigerant pressure is less than the refrigerant pressure before this water spray, then illustrate that water spray serves the effect of step-down, so now rotates back into step S12.
Step S15, controller control water pump 7 increases the spray flow to condenser, and in water spray or after water spray terminates, again obtain the refrigerant pressure P in condenser, then forwards step S14 to; Preferably, controller controls water pump with the spray flow increased to the condenser water spray T4 time, and T4 is the 4th default time threshold.The object so done is sprayed water to condenser with the second flow Q2 in step s 13; the refrigerant pressure P of condenser does not decline; illustrate that the effect of water-spraying control is bad; may occur that high voltage protective is shut down; need the refrigerant pressure P reduced as soon as possible in condenser, therefore need to cool condenser with larger spray flow.
If the refrigerant pressure P in condenser continues to rise or maintain an equal level, and does not decline, then execution step S14 capable of circulation, S15, constantly increases the spray flow of water injector, improves radiating effect.
By the execution S12-S15 of circulation, the refrigerant pressure P of condenser controls to P<P0 the most at last, controls refrigerant pressure in condenser, reduce the object that high voltage protective is shut down to reach.
Embodiment three
Embodiment three relates to a kind of compress control method of the refrigeration unit be applied in embodiment one, and flow chart is see Fig. 3, and it specifically comprises the following steps:
Step S20, refrigeration unit start runs;
Step S21, controller by the refrigerant pressure P in pressure sensor acquisition condenser, obtains liquid level H storage tank in by liquid level sensor by controller 10;
Step S22, controller 10 judges whether liquid level H is more than or equal to H0, and wherein H0 is default liquid level threshold value; If H >=H0, then go to step S23, otherwise, go to step S26.The object of step S22 first detects the liquid level H in storage tank, if H >=H0, illustrates that the water yield in storage tank is sufficient, directly can carry out water spray step-down to condenser; If H<H0, illustrate that the water in storage tank is not too sufficient, then need optionally to carry out water spray step-down with using water wisely.Concrete mode can be described below.
Step S23, controller 10 controls water pump and sprays water to condenser with first flow Q1, and again obtains the refrigerant pressure P in condenser while water spray or after water spray terminates; Preferably, controller controls water pump with first flow Q1 to the condenser water spray T1 time, and T1 is default very first time threshold value;
Step S24, controller judges whether the liquid level before this water spray of comparing of the liquid level in this water spray or after water spray in storage tank has rising; If rise, then forward step S25 to, otherwise forward step S22 to.In present embodiment, said rising specifically to refer in water spray or liquid level after water spray in storage tank is greater than the liquid level before this water spray.If to be judged as in this water spray or after water spray, liquid level is greater than the liquid level before this water spray, then to illustrate that the flow of the water inlet of storage tank is greater than spray flow, have water to overflow the danger of storage tank, now forward step S25 to; If be judged as this water spray in or water spray after liquid level be less than or equal to this water spray before liquid level, then rotate back into step S22.
Step S25, controller controls water pump to be increased to condenser spray flow, and again obtains the liquid level H in storage tank in water spray or after water spray terminates, and then forwards step S24 to; Preferably, controller controls water pump with the spray flow increased to the condenser water spray T2 time, and T2 is the second default time threshold.The object so done is after spraying water to condenser with first flow Q1 in step S23, liquid level H in storage tank does not decline, illustrate that spray flow is less than the flow of inlet water of storage tank, storage tank may be full of and overflow, and needs to improve spray flow to reduce the liquid level in water tank.
If the liquid level H in storage tank continues to rise, then execution step S24 capable of circulation, S25 constantly increases water injector spray flow, improves the water yield of storage tank, and then reduces the liquid level in storage tank as early as possible.
Step S26, controller 10 judges whether refrigerant pressure P is more than or equal to P0, and wherein P0 is default refrigerant pressure threshold; If P >=P0, then forward step S27 to, otherwise, return step S21.In step S22, as liquid level H<H0, illustrate that the water in storage tank is not too sufficient, when being now only judged as that refrigerant pressure P is more than or equal to threshold value P0, spray cooling is performed to condenser, when refrigerant pressure P is less than threshold value P0, illustrate that refrigerant pressure P is not high, do not need water spray, can using water wisely, avoid frequently adding water to storage tank, also can avoid water pump frequent starting.
Step S27, controller 10 controls water pump 7 and sprays water to condenser with the second flow Q3, and again obtains the refrigerant pressure P in condenser while water spray or after water spray terminates; Preferably, controller controls water pump 7 with the second flow Q3 to the condenser water spray T3 time, and T3 is the second default time threshold;
Step S28, controller judge this water spray in or water spray after refrigerant pressure compare this water spray before refrigerant pressure whether have decline; If decline, forward step S26 to, otherwise forward step S29 to.In present embodiment, said decline to refer in water spray or after water spray, refrigerant pressure is less than the refrigerant pressure before this water spray.If to be judged as in this water spray or after water spray, refrigerant pressure is more than or equal to the refrigerant pressure before this water spray, then to illustrate that this water spray does not play the effect of step-down, now forward step S29 to; If to be judged as in this water spray or after water spray, refrigerant pressure is less than the refrigerant pressure before this water spray, then illustrate that water spray serves the effect of step-down, so now rotates back into step S26.
Step S29, controller controls water pump to be increased to condenser spray flow, and again obtains the refrigerant pressure P in condenser in water spray or after water spray terminates, and then forwards step S28 to; Preferably, controller controls water pump with the spray flow increased to the condenser water spray T4 time, and T4 is the second default time threshold.The object so done is after spraying water to condenser with the 3rd flow Q3 in step s 27; the refrigerant pressure P of condenser does not decline; illustrate that the effect of water-spraying control is bad; may occur that high voltage protective is shut down; need the refrigerant pressure P reduced as soon as possible in condenser, therefore need to cool condenser with larger flow.
If the refrigerant pressure P in condenser continues to rise or maintain an equal level, and does not decline, then execution step S28 capable of circulation, S29, constantly increases the flow of water injector water spray, improves radiating effect.
In the present embodiment, by considering the liquid level in storage tank and the refrigerant pressure in condenser, can controlling the refrigerant pressure in condenser in conjunction with the water yield situation in storage tank, avoid the liquid level in storage tank too low or too high, also can avoid waste water resource simultaneously, reach the object of water saving.
Embodiment four
Embodiment four relates to a kind of refrigerator car, and it adopts the refrigeration unit in embodiment one to freeze, and temperature in refrigerator carriage can be made to remain stable, guarantee the quality of REFC.
In addition, it should be understood by one skilled in the art that the accompanying drawing provided at this is all for illustrative purposes, and accompanying drawing is not necessarily drawn in proportion.
Meanwhile, should be appreciated that example embodiment is provided, to make the disclosure be comprehensive, and its scope is fully conveyed to those skilled in the art.A lot of specific detail (such as the example of particular elements, equipment and method) is presented to provide thorough understanding of the disclosure.It will be apparent to one skilled in the art that and do not need to adopt specific detail, example embodiment can be implemented with much different forms, and example embodiment should not be understood to limit the scope of the present disclosure.In some example embodiments, well-known device structure and well-known technology are not described in detail.
Claims (12)
1. a refrigeration unit, comprises refrigerating circuit, and described refrigerating circuit comprises condenser; Also comprise storage tank and spray equipment, described spray equipment is connected for being sprayed water to condenser with storage tank by pipeline; It is characterized in that: also comprise pressure sensor and controller, described pressure sensor is all connected with described controller with described spray equipment; Described pressure sensor is for obtaining refrigerant pressure P in described condenser; Described controller is used for controlling described spray equipment water spray according to described refrigerant pressure P.
2. refrigeration unit as claimed in claim 1, it is characterized in that: also comprise water-collecting tray, described water-collecting tray is arranged on the below of described condenser, and connects described storage tank by pipeline.
3. refrigeration unit as claimed in claim 1, it is characterized in that: also comprise liquid level sensor, described liquid level sensor is connected with described controller, for obtaining the liquid level H in described storage tank; Described controller is used for controlling described spray equipment water spray according to described refrigerant pressure P and liquid level H.
4. refrigeration unit as claimed in claim 1, it is characterized in that: described spray equipment comprises water pump and spraying mechanism, described water pump is connected with described control device.
5. a refrigerator car, it comprises the refrigeration unit according to any one of claim 1-4.
6. a refrigeration unit compress control method, described refrigeration unit comprises refrigerating circuit, and described refrigerating circuit comprises condenser; Described refrigeration unit also comprises storage tank and spray equipment, and described spray equipment is connected for spraying water to condenser by pipeline with storage tank, it is characterized in that: described method comprises:
Obtain refrigerant pressure P in described condenser;
Described spray equipment water spray is controlled according to described refrigerant pressure P.
7. refrigeration unit compress control method as claimed in claim 6, is characterized in that: described method also comprises:
Obtain the liquid level H in storage tank;
Described spray equipment water spray is controlled according to described refrigerant pressure P and liquid level H.
8. refrigeration unit compress control method as claimed in claim 7, is characterized in that: described method comprises:
As refrigerant pressure P >=P0, and during liquid level H<H0, spray water to described condenser, wherein P0 is default refrigerant pressure threshold, and H0 is default liquid level threshold value.
9. refrigeration unit compress control method as claimed in claim 7, is characterized in that: described method comprises:
As liquid level H >=H0, spray water to described condenser.
10. refrigeration unit compress control method as claimed in claim 7, is characterized in that: described method comprises:
As liquid level H >=H0, to spray water to described condenser with first flow Q1 and continue to obtain liquid level H;
When being judged as in water spray and/or when liquid level rises after water spray, increase spray flow.
11. refrigeration unit compress control methods as claimed in claim 6, is characterized in that: described method comprises:
As refrigerant pressure P >=P0, to spray water to described condenser with the second flow Q2 and continue to obtain refrigerant pressure in described condenser;
When being judged as in water spray and/or when refrigerant pressure does not decline after water spray, increase spray flow.
12. refrigeration unit compress control methods as claimed in claim 7, is characterized in that: described method comprises:
As refrigerant pressure P >=P0, and during liquid level H<H0, to spray water to described condenser with the 3rd flow Q3 and continue to obtain refrigerant pressure in described condenser;
When being judged as in water spray and/or when refrigerant pressure does not decline after water spray, increase spray flow.
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| CN201510964991.XA CN105571212B (en) | 2015-12-18 | 2015-12-18 | A kind of refrigeration unit and compress control method and refrigerator car |
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| CN201510964991.XA CN105571212B (en) | 2015-12-18 | 2015-12-18 | A kind of refrigeration unit and compress control method and refrigerator car |
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| CN105571212A true CN105571212A (en) | 2016-05-11 |
| CN105571212B CN105571212B (en) | 2018-08-07 |
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| CN110960151A (en) * | 2018-09-29 | 2020-04-07 | 添可智能科技有限公司 | Cleaning machine and cleaning method thereof |
| CN113212110A (en) * | 2021-06-23 | 2021-08-06 | 珠海格力电器股份有限公司 | Method, device and system for optimizing working environment of refrigerating unit of refrigerator car |
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| CN105571212B (en) | 2018-08-07 |
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