CN203561118U - Condenser cooling enhancement device of compression-type refrigerating machine - Google Patents
Condenser cooling enhancement device of compression-type refrigerating machine Download PDFInfo
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- CN203561118U CN203561118U CN201320657784.6U CN201320657784U CN203561118U CN 203561118 U CN203561118 U CN 203561118U CN 201320657784 U CN201320657784 U CN 201320657784U CN 203561118 U CN203561118 U CN 203561118U
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Abstract
The utility model discloses a condenser cooling enhancement device of a compression-type refrigerating machine and a control method of the device. The device is mounted at a condenser coil and comprises an air guide hood, an electric ventilator, an air guide plate, a water pump, a sensor group, am MCU (microprogrammed control unit) control module, a water mist jet pipe group, a jet nozzle group and a water pipe, wherein the condenser coil is covered with the air guide hood; the electric ventilator is mounted at one end of the air guide hood; the air guide plate is mounted at the other end of the air guide hood; and the MCU control module is electrically connected onto the electric ventilator, the water pump and the sensor group and controls the operation conditions of the electric ventilator and the water pump by receiving and analyzing temperature signals and pressure signals from sensors. The condenser cooling enhancement device can be used for replacing a cooling water tower and a circulation pipeline system of a water-cooled refrigerating unit and can improve the operation efficiency greatly in an extreme environment when added on an air-cooled refrigerating machine.
Description
Technical field
The present invention relates to condenser heat abstractor technical field, relate in particular to a kind of heat radiation intensifier of the condenser for compression refrigerating machine and control method thereof.
Background technology
The structure of common heat sink and strengths and weaknesses analysis:
The structure of water cooled condenser
Water cooled condenser needs a cover system to support its operation, this system comprises the cooling water tank of parcel condenser radiator coil tube, the cooling water circulation pipeline that connects cooling water tank and cooling tower, feed pump, reserve pump, by-pass valve control and bypass line etc., and the structure of cooling tower is by tower body shell mostly, corrugated filler is inside housed, there is cool water shower pipeline filler top, tower top has electric motor driven flabellum that extraneous air is sucked from cooling tower bottom, realize heat exchange with the hotter cooling water of the corrugated filling surface of flowing through, by cooling water temperature, heated air enters atmosphere from cooling tower top.Cooling water after cooling is sent to cooling water tank by water pump and enters next circulation.
The advantage of water cooled condenser
The benefit of water-cooling pattern is that cooling effect is better.
The shortcoming of water cooled condenser shows:
1, the floor space of system is large, complex structure, and cost is high, and pipeline is longer, and the drive motors power of water pump and fan is larger, and this power consumption does not participate in refrigeration, belongs to idle work.The XX type water chiller of take is example, refrigerating capacity 100KW, if joining the power of scroll compressor is 25KW, suppose roof, cooling tower Ba building, 30 meters of cooling water pump lifts, pump power is 11KW, the installation electrical power of supporting cooling tower fan is 2.5KW, unit total installed capacity electrical power is 38.5KW, and belongs to the water pump of idle work, the power of water tower fan electromotor is 13.5KW, accounts for 35% of installation gross electric capacity.
2, cooling tower fan also can blow to surrounding foam, is called " flying water ", and this " flying water " polluted the legal provisions of some countries and can be punished golden.Low-frequency vibration and the noise of cooling tower tend to cause complaint simultaneously.
When 3, just having installed, radiating efficiency is not bad, but because cooling tower is open type, airborne dust, microorganism and algae, in contacting the process of carrying out heat exchange with cooling water, absorbed in large quantities, with cooling water, enter circulating water line deposition amount reproduction, be attached on the heat-transfer surface of refrigerant pipeline, reduced the efficiency of heat exchange, and As time goes on heat exchange efficiency can accelerate to decline.Due to length and the flexibility of circulating water line various degrees, it is all bad that the effect of pipeline-cleaning is carried out in various trials.In the larger area of sand and dust, cooling tower and pipeline even may silt up and cause refrigeration unit to shut down.
4, cooling tower filler is because under the effect of sunlight, air, hot water and microorganism, and aging speed is very fast, so must regularly shut down and change, cost be very high.For user's (as freezer etc.) of ask for something refrigeration system continuous firing, because above-mentioned reason causes, by forced-stopping machine, be unacceptable.
The structure of air cooled condenser
Air cooling refrigeration machine in when work, refrigerant enters the coil pipe condenser from the port of export of compressor with higher temperature and pressure, the motor that is positioned at coil pipe one side drives fan blade, pressure differential is manufactured in both sides at condenser coil, realize forced ventilation, the heat of refrigerant is conducted to the air to the condenser coil of flowing through, the temperature and pressure of refrigerant drops to a certain degree by choke valve and enters evaporator evaporation refrigeration with liquid state, and then refrigerant is got back to suction port of compressor end with gaseous state and entered next circulation.
The advantage of air cooled condenser
Volume is little, and floor space is little, and system is simple, manufactures, installation and operation cost is relatively low, and maintenance workload is little, and in the situation that environment temperature is moderate, reliability is better.
The shortcoming of air cooled condenser shows:
1, the cooling medium of air cooled condenser is air, by air and condenser coil, conduct with radiation and dispel the heat, and the thermal capacity of air only has 1.0*103J/ (kg. ℃), radiating effect depends on that environment temperature is lower than the difference of condenser coil temperature, when this difference is not enough, the air of condenser coil of flowing through can not be taken away enough heats, make the temperature and pressure of condensator outlet end refrigerant higher than ideal operation temperature and pressure, compressor load increases the weight of, and causes power consumption sharply to rise and refrigerating capacity can not correspondingly improve.Under environment temperature levels off to the extreme condition of condenser coil temperature, compressor even may be shut down because of overload.
2, due to traditional condenser layout and the structure defectiveness of fan, make the air flow field irrational distribution on condenser radiator coil tube surface, more or less exist " doing ", be that condenser surface local air flows not smooth and causes radiator local temperature higher, thereby tie down the overall radiating efficiency of condenser.
3, part air cooled condenser is when environment temperature is too high, take direct shower water on condenser (comprising condensed water and external water source that evaporimeter collection comes) to reduce temperature, water consumption is larger, be not suitable for water-deficient area, if recycle shower water, also can run into the problem that water is subject to sand and dust and microbial contamination, increase maintenance, finally still can cause radiating efficiency to decline to a great extent; On the other hand, when environment temperature and humidity are all higher, the evaporation rate of shower water declines, and cooling effectiveness just declines thereupon, and this mode can not solve the problem that under extreme working environment, refrigerating efficiency declines.
Improve the meaning of condenser efficiency
No matter be water cooled condenser or traditional air cooled condenser, at radiating efficiency, decline, refrigerant pressure and temperature is during higher than ideal operation temperature and pressure, and refrigerating efficiency all can decline, and power consumption rises.According to statistics, between given zone in, 1 degree Celsius of the every reduction of evaporator inlet end refrigerant temperature, the power consumption of compressor just reduces by 5%.So refrigerant temperature is controlled in ideal operation temperature range, there is huge energy-saving potential.
Improve the approach of condenser radiating efficiency
According to calorifics principle, the mode of distributing of heat comprises evaporation, convection current, conduction and radiation.
When condenser adopts the heat radiation of water-cooling tower, because specific heat of water capacity is large, and above-mentioned four kinds of radiating modes are all playing a role during system works, so good heat dissipation effect.And when recirculated cooling water is subject to dust and microbial contamination, the incrustation scale that condenser pan tube-surface is formed has hindered refrigerant to conduct heat to cooling water, radiating efficiency is reduced.If can utilize the feature that the thermal capacity of water is larger, do not rely on again cooling tower, can also utilize evaporation, convection current, conduction and radiation to dispel the heat simultaneously, just can increase substantially the radiating efficiency of condenser.
Summary of the invention
The object of the invention is to the problems referred to above weak point, the condenser heat radiation intensifier of compression refrigerating machine is provided, have simple in structure, reliability is high, reduce the advantage of operating cost, can, for replacing cooling tower and the circulating pipe system of water cooled refrigeration unit, while being installed at air cooling refrigeration machine, can increase substantially the operational efficiency in extreme environment.
In order to achieve the above object, the present invention is by the following technical solutions:
The condenser heat radiation intensifier of compression refrigerating machine, is arranged on condenser coil place, and described condenser coil is divided into arrival end and the port of export, and it comprises:
Kuppe, is sheathed on condenser periphery, and its inside is provided with the circulation road connecting toward the other end from one end;
Electrically ventilating machine, it is fixed on circulation road one end;
Air baffle, it is fixed on the circulation road other end, and is provided with several for coordinating opening and the baffle plate of Air Flow;
Water smoke device, described water smoke device comprises water pump, nozzle sets, jet spray pipe group and water pipe; Described water pump, it is provided with water inlet and delivery port; Jet spray pipe group, its air baffle end that is fixed on circulation road is inner, the jet spray pipe of some parallel connections, consists of; Described nozzle sets, its air baffle end that is fixed on circulation road is inner, several nozzles, consists of, and each nozzle correspondence is arranged on jet spray pipe; Water pipe, its one end delivery port set with described water pump is connected, and the other end is connected with described jet spray pipe;
Sensor group, by the first temperature sensor that is arranged on described arrival end, is arranged on the second temperature sensor of the described port of export, and the pressure sensor composition that is arranged on described delivery port;
MCU control module, it is electrically connected at described electrically ventilating machine, water pump, power module, input module, the first temperature sensor, the second temperature sensor and pressure sensor.
MCU (Micro Control Unit) Chinese is micro-control unit, claims again one chip microcomputer (Single Chip Microcomputer) or single-chip microcomputer.
Described circulation road from electrically ventilating machine end toward air baffle end be divided into successively first area for electrically ventilating machine is installed, for the second area of condenser is installed, for the 3rd region of jet spray pipe and nozzle sets is installed.The trizonal distribution of described circulation road has determined the direction of cooling blast, improves cooling effect.
Described circulation road is shrunk to annular letter road from second area gradually toward electrically ventilating machine end, is conducive to improve cooling effect.
Described air baffle is connected by buckle structure with described kuppe, or is bolted to connection.
Angle between described injection stream direction and described condenser pan end surfaces, between 0 ° of-180 ° of degree, is conducive to improve cooling effect.
The condenser heat radiation intensifier control method of compression refrigerating machine, is characterized in that step is:
A1, described MCU control module judge whether compression refrigerating machine starts shooting, if proceed to steps A 2;
A2, described the first temperature sensor and described the second temperature sensor are surveyed respectively the refrigerant temperature of the set entrance and exit of described condenser, proceed to steps A 3;
A3, described MCU control module receive the temperature signal of the first temperature sensor and the second temperature sensor, the internal processor of described MCU control module is analyzed judgement to temperature signal, if temperature is lower than default low temperature line, proceed to so A4, if temperature is higher than low temperature line and lower than the highest preset temperature line, proceed to so A5, if temperature, higher than the highest preset temperature line, proceeds to A6 so;
A4, described MCU control module are sent air-cooled signal to described electrically ventilating machine, and electrically ventilating machine starts running;
A5, described MCU control module are sent water-cooled signal to described water pump, and water pump runs well, and described MCU control module is sent air-cooled signal to described electrically ventilating machine, and electrically ventilating machine runs well;
A6, described MCU control module are sent and are strengthened water-cooled signal to described water pump, and water pump accelerated service strengthens hydraulic pressure, and described MCU control module is sent and strengthened air-cooled signal, electrically ventilating machine accelerated service augmented flow to described electrically ventilating machine.
The condenser heat radiation intensifier control method of compression refrigerating machine of the present invention, it regulates the ruuning situation of water pump and electrically ventilating machine according to actual temperature situation, to reach the radiating effect of efficient energy-saving.
It is simple in structure that the present invention adopts said structure to have, with low cost, and reliability is high, reduces the advantage of operating cost; Be used for transforming water cooled refrigeration unit, while replacing cooling tower and water circulation system, can increase substantially the efficiency of this class refrigerator system, while being installed at air cooling refrigeration machine, can increase substantially operational efficiency and reliability in extreme environment.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also derive other similar accompanying drawings according to these accompanying drawings.
Fig. 1 is structural representation of the present invention;
Fig. 2 is circuit module schematic diagram of the present invention;
Fig. 3 is step schematic diagram of the present invention.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1 to Figure 3, the condenser of compression refrigerating machine of the present invention heat radiation intensifier, is arranged on condenser coil 4 places, and described condenser coil 4 is divided into arrival end and the port of export, and it comprises:
Kuppe 1, is sheathed on condenser periphery, and its inside is provided with the circulation road connecting toward the other end from one end;
Electrically ventilating machine 3, it is fixed on circulation road one end;
Air baffle 2, it is fixed on the circulation road other end, and is provided with several for coordinating opening and the baffle plate of Air Flow;
Water pump 8, it is provided with water inlet and delivery port;
Power module;
Input module;
Sensor group, by the first temperature sensor that is arranged on described arrival end, is arranged on the second temperature sensor of the described port of export, and the pressure sensor composition that is arranged on described delivery port;
MCU control module, it is electrically connected at electrically ventilating machine, water pump, power module, input module, the first temperature sensor 10, the second temperature sensor 11 and pressure sensor 12;
Jet spray pipe group, its air baffle end that is fixed on circulation road is inner, several nozzles 5, consists of, and each nozzle 5 correspondence is arranged on jet spray pipe 6;
Water pipe 7, its one end delivery port set with described water pump is connected, and the other end is connected with described jet spray pipe 6;
Nozzle sets, its air baffle end that is fixed on circulation road is inner, several nozzles 5, consists of, and each nozzle correspondence is arranged on jet spray pipe.
In order to eliminate the recirculating zone of cooling blast and " the doing " on condenser, make cooling effect better, described circulation road is shrunk to annular letter road from the second area that condenser is installed gradually toward electrically ventilating machine end.
For easy disassembly, described air baffle 2 is connected by buckle structure with described kuppe 1, or is bolted to connection.
Described circulation road from electrically ventilating machine end toward air baffle end be divided into successively first area for electrically ventilating machine 3 is installed, for the second area of condenser 4 is installed, for the 3rd region of nozzle sets is installed.
Described nozzle 5 jet directions become suitable angle with described condenser coil.
In order to control more accurately hydraulic pressure, described pressure sensor is arranged on the set delivery port of described water pump 8, and described pressure sensor and described MCU control module 9 are electrically connected.Described pressure sensor is for surveying the hydraulic pressure value after water pump 8 pressurizations, and being conducive to more energy-conservation mode is that condenser 4 carries out cooling work.
As shown in Figure 3, the condenser of compression refrigerating machine heat radiation intensifier control method, the steps include:
A1, described MCU control module 9 judge whether compression refrigerating machine starts shooting, if proceed to steps A 2;
A2, described the first temperature sensor 10 and described the second temperature sensor 11 are surveyed respectively the refrigerant temperature of described condenser 4 set entrance and exits, proceed to steps A 3;
A3, described MCU control module 9 receive the temperature signal of the first temperature sensor 10 and the second temperature sensor 11, the built-in processor of described MCU control module 9 is analyzed judgement to temperature signal, if temperature is lower than default low temperature line, proceed to so A4, if temperature is higher than low temperature line and lower than the highest preset temperature line, proceed to so A5, if temperature, higher than the highest preset temperature line, proceeds to A6 so;
A4, described MCU control module 9 are sent air-cooled signal to described electrically ventilating machine 3, and electrically ventilating machine 3 starts running;
A5, described MCU control module 9 are sent water-cooled signal to described water pump 8, and water pump 8 runs well, and described MCU control module 9 is sent air-cooled signal to described electrically ventilating machine 3, and electrically ventilating machine 3 runs well;
A6, described MCU control module 9 are sent and are strengthened water-cooled signal to described water pump 8, and water pump 8 accelerated services strengthen hydraulic pressure, and described MCU control module 9 is sent and strengthened air-cooled signal, electrically ventilating machine 3 accelerated service augmented flows to described electrically ventilating machine 3.
The condenser heat radiation intensifier control method of compression refrigerating machine of the present invention, it regulates the ruuning situation of water pump and electrically ventilating machine according to actual temperature situation, to reach the radiating effect of efficient energy-saving.
After air-conditioning system start, electric-control system starts compressor, refrigerant enters condenser 4 with the gaseous state of HTHP, the electrically ventilating machine 3 being contained in circulation road starts exhausting, water pump 8 is transported to jet spray pipe 6 by water by water pipe 7 with suitable pressure and ejects from nozzle 5, form jet spray, because condenser 4 is by wind scooper 1 and air baffle 2 parcels, so the interior formation of wind scooper 1 is less than the low-pressure area of ambient pressure, outside air is forced through air baffle 2 guiding and accelerates and mix with jet spray under the effect of pressure differential, and the whole condenser 4 that leads equably, water smoke forms one deck moisture film as thin as a wafer at condenser 4, in condenser 4, the heat of refrigerant is by conduction, evaporation, the air that the comprehensive function of radiation and convection current is blown and jet spray absorb and are entered atmosphere by electrically ventilating machine 3, the temperature and pressure of refrigerant drops to after suitable degree, by the road and choke valve, enter evaporimeter and carry out heat exchange with needing the medium of refrigeration, arrival end with gaseous state inflow compressor enters next circulation again.
The refrigerant temperature signal that electric-control system detects by the first temperature sensor 10 of condenser inlet end that MCU control module 9 is received and the second heat sensor 11 of the port of export, contrast with MCU control module 9 internal program setting values, send the rotating speed that control signal improves or reduce electrically ventilating machine 3, and control in the same way the flow of water pump 8, reach and both guarantee that refrigerant temperature is in ideal operation temperature range, again the object of water-saving and electricity-saving to greatest extent.
When environment temperature on the low side, the refrigerant temperature that the first temperature sensor 10 that the MCU control module 9 of electric-control system receives and the second temperature sensor 11 detect, when process is contrasted lower than ideal operation temperature range with programmed values, MCU control module 9 is controlled water pump 8 and is reduced rotating speed, reduce the output flow of water pump 8, to reduce water consumption and power consumption.The refrigerant temperature detecting under this operating mode, when process is contrasted still lower than ideal operation temperature range with programmed values, MCU control module 9 will stop the work of water pump 8, only by electrically ventilating machine 3, dispels the heat.
When environment temperature higher, the first temperature sensor 10 that the MCU control module 9 of electric-control system receives, the refrigerant temperature that the second temperature sensor 11 detects, when process is contrasted higher than ideal operation temperature range with programmed values, MCU control module 9 is controlled water pump 8 and is accelerated, the output flow of water pump 8 will be strengthened, or improve the rotating speed of electrically ventilating machine 3 simultaneously, with heat radiation usefulness.
The feature of electric-control system is, the refrigerant temperature signal that electric-control system detects by the first temperature sensor 10 of condenser 4 arrival ends that MCU control module 9 is received and the second temperature sensor 11 of the port of export, contrast with programmed values, send the rotating speed that control signal improves or reduce electrically ventilating machine 3, and by the flow of MCU control module 9 control water pumps 8, reach and both guarantee that refrigerant temperature is in ideal operation temperature range, again the object of water-saving and electricity-saving to greatest extent.
The installation position of described electrically ventilating machine is equipped with two kinds of selections, the first position is chosen as: the first area parts at described electrically ventilating machine place are arranged on the air baffle end of described kuppe, now described electrically ventilating machine plays blowing effect, the second position is chosen as: described electrically ventilating machine is arranged on the air baffle other end of described kuppe, now described electrically ventilating machine plays draft effect, namely the first area parts at described electrically ventilating machine place both can be arranged on one end of circulation road, also can be arranged on the other end of circulation road.
It is simple in structure that the present invention adopts said structure to have, with low cost, reliability is high, reduce the advantage of operating cost, be used for transforming water cooled refrigeration unit, while replacing cooling tower and water circulation system, can increase substantially the efficiency of this class refrigerator system, while being installed at air cooling refrigeration machine, can increase substantially operational efficiency and reliability in extreme environment.
The foregoing is only preferred embodiment of the present invention; not in order to limit the present invention, the present invention is equally applicable to other corresponding radiators, within the spirit and principles in the present invention all; any modification of doing, be equal to replacement, improvement etc., within protection scope of the present invention all should be included in.
Claims (5)
1. the condenser of compression refrigerating machine heat radiation intensifier, is arranged on condenser coil place, and described condenser coil is divided into arrival end and the port of export, it is characterized in that comprising:
Kuppe, is sheathed on condenser periphery, and its inside is provided with the circulation road connecting toward the other end from one end;
Electrically ventilating machine, it is fixed on circulation road one end;
Air baffle, it is fixed on the circulation road other end, and is provided with several for coordinating opening and the baffle plate of Air Flow;
Water smoke device, described water smoke device comprises water pump, nozzle sets, jet spray pipe group and water pipe; Described water pump, it is provided with water inlet and delivery port; Jet spray pipe group, its air baffle end that is fixed on circulation road is inner, the jet spray pipe of some parallel connections, consists of; Described nozzle sets, its air baffle end that is fixed on circulation road is inner, several nozzles, consists of, and each nozzle correspondence is arranged on jet spray pipe; Water pipe, its one end delivery port set with described water pump is connected, and the other end is connected with described jet spray pipe;
Sensor group, by the first temperature sensor that is arranged on described arrival end, is arranged on the second temperature sensor of the described port of export, and the pressure sensor composition that is arranged on described delivery port;
MCU control module, it is electrically connected at described electrically ventilating machine, water pump, power module, input module, the first temperature sensor, the second temperature sensor and pressure sensor.
2. the condenser of compression refrigerating machine heat radiation intensifier according to claim 1, is characterized in that: described circulation road from electrically ventilating machine end toward air baffle end be divided into successively first area for electrically ventilating machine is installed, for the second area of condenser is installed, for the 3rd region of jet spray pipe and nozzle sets is installed.
3. the condenser of compression refrigerating machine heat radiation intensifier according to claim 2, is characterized in that: described circulation road is shrunk to annular letter road from second area gradually toward electrically ventilating machine end.
4. the condenser of compression refrigerating machine heat radiation intensifier according to claim 1, is characterized in that: described air baffle is connected by buckle structure with described kuppe, or is bolted to connection.
5. the condenser of compression refrigerating machine heat radiation intensifier according to claim 1, is characterized in that: the angle between described injection stream direction and described condenser pan end surfaces is between 0 ° of-180 ° of degree.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320657784.6U CN203561118U (en) | 2013-10-23 | 2013-10-23 | Condenser cooling enhancement device of compression-type refrigerating machine |
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| CN201320657784.6U CN203561118U (en) | 2013-10-23 | 2013-10-23 | Condenser cooling enhancement device of compression-type refrigerating machine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103557643A (en) * | 2013-10-23 | 2014-02-05 | 珠海风合节能科技开发有限公司 | Condenser heat dissipation enhancing device for compression refrigerating machine and control method thereof |
| US10941955B2 (en) | 2017-10-27 | 2021-03-09 | Dometic Sweden Ab | Systems, methods, and apparatuses for providing communications between climate control devices in a recreational vehicle |
| US11254183B2 (en) | 2017-08-25 | 2022-02-22 | Dometic Sweden Ab | Recreational vehicle, cooling device, controlling system and method for controlling the cooling device |
-
2013
- 2013-10-23 CN CN201320657784.6U patent/CN203561118U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103557643A (en) * | 2013-10-23 | 2014-02-05 | 珠海风合节能科技开发有限公司 | Condenser heat dissipation enhancing device for compression refrigerating machine and control method thereof |
| US11254183B2 (en) | 2017-08-25 | 2022-02-22 | Dometic Sweden Ab | Recreational vehicle, cooling device, controlling system and method for controlling the cooling device |
| US11919363B2 (en) | 2017-08-25 | 2024-03-05 | Dometic Sweden Ab | Recreational vehicle, cooling device, controlling system and method for controlling the cooling device |
| US10941955B2 (en) | 2017-10-27 | 2021-03-09 | Dometic Sweden Ab | Systems, methods, and apparatuses for providing communications between climate control devices in a recreational vehicle |
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Granted publication date: 20140423 Termination date: 20201023 |