CN201622078U - Frost detection device and heat pump type air conditioner - Google Patents
Frost detection device and heat pump type air conditioner Download PDFInfo
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- CN201622078U CN201622078U CN2009200617701U CN200920061770U CN201622078U CN 201622078 U CN201622078 U CN 201622078U CN 2009200617701 U CN2009200617701 U CN 2009200617701U CN 200920061770 U CN200920061770 U CN 200920061770U CN 201622078 U CN201622078 U CN 201622078U
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- 238000001514 detection method Methods 0.000 title abstract 11
- 238000009434 installation Methods 0.000 claims description 30
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 29
- 239000003507 refrigerant Substances 0.000 claims description 6
- 230000005693 optoelectronics Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 2
- 238000010257 thawing Methods 0.000 abstract description 34
- 238000000034 method Methods 0.000 abstract description 17
- 238000010438 heat treatment Methods 0.000 abstract description 10
- 238000005057 refrigeration Methods 0.000 abstract description 8
- 230000003287 optical effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 10
- 230000004888 barrier function Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
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Abstract
The utility model discloses a frost detection device, which comprises a light emitting device and a light receiving device; the heat pump type air conditioner comprises a frost detection device arranged on a circulating system, wherein the frost detection device comprises a light-emitting device and a light-receiving device, and the frost detection device is connected with a control component through a circuit and converts a detected optical signal into an electric signal to be transmitted to the control component. The frost detection device uses frost as an obstacle of a light beam channel, and changes the intensity of light through shielding and refraction of the light beam, so that the output signal of the light receiving device is changed. The method can be applied to the defrosting control, the frost volume control and the like of the refrigeration appliance. The detection is carried out by a frost detection device, or the double detection is carried out by a pipeline temperature sensor and the frost detection device. The frost detection device is used for detecting the circulating system, whether frost is formed or not can be accurately judged, effective defrosting is carried out, and the heating efficiency of the heat pump of the air conditioner is improved.
Description
Technical field
The utility model belongs to refrigeration technology field, relates in particular to a kind of frost pick-up unit and heat pump type air conditioner.
Background technology
The defrosting of prior art air conditioner control all is to adopt the control that defrosts of sensor frosting situations such as temperature, pressure, wind speed, rotating speed indirectly.In implementation process, because the influence of factors such as system and environment, actual and theory differs bigger, or defrosting not exclusively, or defrosting in advance, and this all reduces the heat pump heating efficiency.
For example, in traditional heat pump type air conditioner, temperature sensor on the employing outdoor heat converter is judged the frosting situation on the outdoor heat converter, temperature sensor starts defrost operation on the outdoor heat converter with being arranged on, simultaneously, defrosting time also is to finish to determine automatically by sensing chamber's Outer Tube temperature or by detecting the schedule time.In this Defrost method, the phenomenon of mistake defrosting appears through regular meeting, promptly in fact on the outdoor heat converter not frost form or have frost to eliminate after also continue defrosting.In order to address the above problem, a lot of companies have all proposed some defrosting modes, but all well do not address this problem, as disclosed utility application CN1164006A on the Chinese patent communique, open day on November 5th, 1997, the applicant is Korea S LG Electronics Inc., this patented claim discloses a kind of Defrost method of heat pump type air conditioner, comprise: the first temperature survey step that is used for the temperature gap TD1 between measuring chamber interior conduit temperature T E1 and the room temperature TR1 after heating operation starts constantly through m1 minute, the defrosting step that each temperature that is used for the second temperature survey step of the temperature gap TD2 between measuring chamber interior conduit temperature T E2 and the room temperature TR2 of process after m2 minute and is used for the first and second temperature survey steps are measured and reference value compare and detect frosting.This utility application is by under the heating operation pattern, rely on interior conduit temperature sensor and indoor temperature transmitter to start defrost operation, defrosting time is by after carrying out difference respectively between two groups of interior conduit temperature that obtain two different time measurements and the indoor temperature, difference once more, compare with a certain setting value then, determine that this utility model of defrosting time will obtain different setting defrosting time sections by setting different fiducial values, so just changed the certain problem of time in traditional Defrost method, the degree of accuracy of defrosting is increased, but still do not solve the heat pump type air conditioner defrosting time along with the frosting situation on the outdoor heat converter, the problem of automatic allotment.
Summary of the invention
The purpose of this utility model is to provide a kind of frost pick-up unit and heat pump type air conditioner, can further improve the accuracy to the judgement of frosting, can in time enter and withdraw from Defrost operation, improves the heat pump heating efficiency.
The utility model is achieved through the following technical solutions:
The frost pick-up unit, include luminescent device and light receiving element, by pedestal as support component, described pedestal is provided with luminescent device installation portion, light receiving element installation portion and printed-wiring board (PWB) installation portion, and described luminescent device installation portion, light receiving element installation portion and printed-wiring board (PWB) installation portion are semi-enclosed cavity; Luminescent device and light receiving element are fixed on the pedestal in the corresponding cavity by printed-wiring board (PWB) (63); The lead transmission of electric signal by being connected with printed-wiring board (PWB).
Heat pump type air conditioner includes control assembly, outdoor heat exchanger, outdoor fan, compressor, four-way valve, indoor heat exchanger, indoor fan and restriction device; Described outdoor heat exchanger, compressor, four-way valve, restriction device and indoor heat exchanger are connected to form the circulation system of sealing by refrigerant pipe, and refrigerant circulates in the described circulation system; Wherein, described heat pump type air conditioner also includes the frost pick-up unit that is installed on the circulation system, and described frost pick-up unit is connected with the control assembly circuit, and detected light signal is converted to electric signal is transferred to control assembly.
The beneficial effects of the utility model are as follows:
Heat pump type air conditioner of the present utility model, owing to include the frost pick-up unit that is installed on the circulation system, described frost pick-up unit includes luminescent device and light receiving element, described frost pick-up unit is connected with the control assembly circuit, and detected light signal is converted to electric signal is transferred to control assembly.The principle of work of frost pick-up unit is: utilize the barrier of frost as beam channel, by to the blocking, reflect of light beam, change light intensity, the light receiving element output signal is changed.This device can be applicable to aspects such as the defrosting control, the control of frost volume of refrigerating appliance.Be contained in the position that needs to detect frost during application.Detect by the frost pick-up unit, or by pipeline temperature sensor and frost pick-up unit double check.Control the defrosting of heat pump type air conditioner of the present utility model, can use the frost pick-up unit that the circulation system is detected, effectively set the condition that heat pump type air conditioner entered and withdrawed from defrosting mode.Can accurately whether judge frosting, effectively defrost, improve air conditioner heat pump heating efficiency.Simultaneously, make the heat pump type air conditioner defrosting time along with the frosting situation on the outdoor heat converter, allotment automatically prevents to miss the generation of the phenomenon that defrosts.
Description of drawings
Fig. 1 is defrosting control method control mode one schematic diagram of the utility model heat pump type air conditioner;
Fig. 2 is defrosting control method control mode two schematic diagrams of the utility model heat pump type air conditioner;
Fig. 3 is defrosting control method control mode one process flow diagram of the utility model heat pump type air conditioner;
Fig. 4 is defrosting control method control mode two process flow diagrams of the utility model heat pump type air conditioner;
Fig. 5 is embodiment one circulation system principle schematic of the utility model heat pump type air conditioner;
Fig. 6 is the embodiment two-circulation system principle schematic of the utility model heat pump type air conditioner;
Fig. 7 is the utility model frost pick-up unit structure exploded perspective view;
Fig. 8 is the utility model frost pick-up unit mounting structure synoptic diagram;
Fig. 9 is the utility model frost pick-up unit principle of work synoptic diagram;
Figure 10 is the base structure synoptic diagram of the utility model frost pick-up unit;
Figure 11 is the printed-wiring board (PWB) installation portion structure synoptic diagram of the pedestal of the utility model frost pick-up unit;
Figure 12 is the utility model frost pick-up unit inner structure synoptic diagram;
Figure 13 is the utility model frost pick-up unit sectional structure synoptic diagram;
Figure 14 is the utility model frost pick-up unit perspective view.
Description of reference numerals:
1, compressor, 2, four-way valve, 3, outdoor heat exchanger, 4, restriction device, 5, indoor heat exchanger, 6, the frost pick-up unit, 7, temperature sensor, 8, the frosting body, 9, light beam, 61, luminescent device, 62, light receiving element, 63, printed-wiring board (PWB), 64, lead, 65, pedestal, 66, guard, 67, geometrical clamp, 621, light hole, 651, the luminescent device installation portion, 652, the light receiving element installation portion, 653, printed-wiring board (PWB) installation portion, 654, installed surface, 81, frost.
Embodiment
The utility model discloses a kind of heat pump type air conditioner, as Fig. 5,6,7, includes control assembly, outdoor heat exchanger 3, outdoor fan, compressor 1, four-way valve 2, indoor heat exchanger 5, indoor fan and restriction device 4; Described outdoor heat exchanger 3, compressor 1, four-way valve 2, restriction device 4 and indoor heat exchanger 5 are connected to form the circulation system of sealing by refrigerant pipe, and refrigerant circulates in the described circulation system; Wherein, described heat pump type air conditioner also includes the frost pick-up unit 6 that is installed on the circulation system, described frost pick-up unit 6 includes luminescent device 61 and light receiving element 62, described frost pick-up unit 6 is connected with described control assembly circuit, and detected light signal is converted to electric signal is transferred to described control assembly.
Described indoor heat exchanger 5 is provided with temperature sensor.
As Fig. 7,8,10,11,12,13,14, described frost pick-up unit 6 by pedestal 65 as support component, described pedestal 65 is provided with luminescent device installation portion 651, light receiving element installation portion 652 and printed-wiring board (PWB) installation portion 653, and described luminescent device installation portion 651, light receiving element installation portion 652 and printed-wiring board (PWB) installation portion 653 are semi-enclosed cavity; Luminescent device 61 and light receiving element 62 are fixed on the pedestal 65 in the corresponding cavity by printed-wiring board (PWB) 63; Lead 64 transmission of electric signal by being connected with printed-wiring board (PWB) 63.
Described light receiving element 62 is a light receiving surface towards the one side of luminescent device 61, and described pedestal 65 is provided with light hole 621 near the wall at light receiving surface place; Described frost pick-up unit 6 also includes the guard 66 and the geometrical clamp 67 of proofing dust and protecting, and guard 66 is positioned at outside the pedestal 65, is buckled in position between described luminescent device installation portion 651 and the light receiving element installation portion 652; Geometrical clamp 67 is half-twist " U " shape, is clamped on the depression position of described luminescent device installation portion 651 and light receiving element installation portion 652 belows.As shown in Figure 9, pedestal 65 also can adopt transparent material, and in pedestal 65 outsides, light receiving element 62 is provided with light-blocking member 10 towards the one side of luminescent device 61, light-blocking member is provided with light hole 621.
Described guard 66 is and covers shape, and is provided with a plurality of mesh, is positioned at the front of described pedestal 65.
At the back side of described pedestal 65, between luminescent device 61, light receiving element 62, be provided with the installing space of frosting body, described pedestal 65 is provided with the installed surface 654 of frosting body 8.
Described frost pick-up unit 6 another kind of modes are: utilize optoelectronic switch D301F31A, described optoelectronic switch is the U type.
The principle of work of this frost pick-up unit 6 is: as Fig. 8,9, utilize the barrier of frost 81 as beam channel, by to the blocking, reflect of light beam, change light intensity, the light receiving element output signal is changed.This device can be applicable to aspects such as the defrosting control, the control of frost volume of refrigerating appliance.Be contained in the position that needs to detect frost during application.
Heat pump type air conditioner of the present utility model, frost pick-up unit be contained on the outdoor heat exchanger or the pipeline of restriction device 4 and pipe arrangement on the position of frosting easily, installed surface is close to the surface of heat interchanger, pipeline; On the pipeline of refrigeration system, also be provided with temperature sensor 7.For example:
Embodiment one:
As Fig. 5, this device of these frost pick-up unit 6 usefulness is contained in it on pipeline of refrigeration system flow controller outlet in the control of air conditioner automatic defrosting, and installed surface is close to tube-surface.When frost formation and output corresponding signal were arranged between luminescent device, the light receiving element, air conditioner entered the Defrost operation state by controller control.After entering Defrost operation, when fusing of the frost between luminescent device, the light receiving element and output corresponding signal, finish Defrost operation.
Embodiment two:
As Fig. 6, this device of these frost pick-up unit 6 usefulness is contained in it on pipeline of outdoor heat exchanger 3 in the control of air conditioner automatic defrosting, and installed surface is close to tube-surface.When frost formation and output corresponding signal were arranged between luminescent device, the light receiving element, air conditioner entered the Defrost operation state by controller control.After entering Defrost operation, when fusing of the frost between luminescent device, the light receiving element and output corresponding signal, finish Defrost operation.
As the defrosting control method of heat pump type air conditioner as described in embodiment one or the embodiment two, as Fig. 1,3, wherein, the air conditioner heat-production operation is after t1 minute, and the frost pick-up unit promptly detects the circulation system; When the frost pick-up unit detected the circulation system frost is arranged, air conditioner transferred the Defrost operation pattern to; Behind air conditioner Defrost operation t3 minute, the frost pick-up unit detects the circulation system; When the frost pick-up unit detects the circulation system when frostless, air conditioner transfers the heating operation pattern to.
The defrosting control method of heat pump type air conditioner specifically comprises:
Step 1: the defrosting control model begins;
Step 2: control assembly judge the defrost operation mark whether=1, in this way, enter step 3, as not, enter step 8;
Step 3: the frost pick-up unit detects whether finished defrost, in this way, enters step 5, as not, enters step 4;
Step 4: withdraw from the defrosting control model, to step 1;
Step 5: whether the control assembly judgement time-delay 2min time arrives, in this way, enters step 6, as not, enters step 4;
Step 6: the four-way valve of heat pump type air conditioner is opened, outdoor fan starts, and indoor fan normally starts, and enters step 7;
Step 7: the zero clearing of defrost mark enters step 14;
Step 8: control assembly judges whether to satisfy compressor minimum working time, in this way, enters step 10, as not, enters step 9;
Step 9: withdraw from the defrosting control model, to step 1;
Step 10: control assembly judges whether to satisfy accumulated running time, in this way, enters step 11, as not, enters step 9;
Step 11: the frost pick-up unit detects whether frost is arranged, and in this way, enters step 12, as not, enters step 9;
Step 12: the four-way valve of heat pump type air conditioner stops, outdoor fan stops, and indoor fan stops, and enters the Defrost process, enters step 13;
Step 13: control assembly is set defrost operation mark=1, enters step 14;
Step 14: withdraw from the defrosting control model, to step 1.
Control mode one: by single-chip microcomputer signal is carried out processing controls, behind heat pump heating operation certain hour, the continuous certain hour of frost pick-up unit detects frosting and output corresponding signal, and air conditioner enters Defrost operation.After entering Defrost operation, when the frost pick-up unit detects frostless and during output corresponding signal, finishes Defrost operation behind the time-delay certain hour.
The defrosting control method of above-mentioned heat pump type air conditioner is as Fig. 2,4, wherein, when the frost pick-up unit detects the circulation system frost is arranged, the single-chip microcomputer of control assembly is by further analyzing the pipeline variation of temperature, and confirming has frost, air conditioner to transfer the Defrost operation pattern to.
The defrosting control method of above-mentioned heat pump type air conditioner is as Fig. 2,4, wherein, when the frost pick-up unit detects the circulation system when frostless, the single-chip microcomputer of control assembly is by further analyzing the pipeline variation of temperature, and the affirmation frost has been changed, and air conditioner transfers the heating operation pattern to.
Described pipeline temperature refers to the temperature at any place of the circulation system, refers in particular to the temperature of evaporator.
Control mode two: signal is carried out processing controls by single-chip microcomputer, behind heat pump heating operation certain hour, the continuous certain hour of frost pick-up unit detects frosting and output corresponding signal, and when the continuous certain hour of temperature sensor detected the pipeline temperature and is lower than setting value, air conditioner entered Defrost operation.After entering Defrost operation, when the frost pick-up unit detects frostless and during output corresponding signal, finish Defrost operation after when time-delay certain hour, the continuous certain hour of temperature sensor detect the pipeline temperature and be higher than setting value.
Below illustrate control mode one and control mode two:
Control mode one example 1. frost pick-up units place on the restriction device export pipeline, and installed surface is close to tube-surface.Temperature sensor places on the pipeline of indoor heat exchanger.When the continuous t1min of frost pick-up unit output frosting signal, and the continuous t2min of temperature sensor is when detecting the refrigeration system pipeline temperature and being lower than T1 ℃, and air conditioner enters Defrost operation.After entering Defrost operation, when the frost pick-up unit detected frostless state and output corresponding signal, time-delay t3min finished Defrost operation.
Control mode one example 2
The frost pick-up unit places the position that forms frost on the pipe arrangement pipeline easily, and installed surface is close to tube-surface.Temperature sensor places on the pipeline of indoor heat exchanger.When the continuous t1min of frost pick-up unit output frosting signal, and the continuous t2min of temperature sensor is when detecting the pipeline temperature and being lower than T1 ℃, and air conditioner enters Defrost operation.After entering Defrost operation, when the frost pick-up unit detected frostless state and output corresponding signal, time-delay t3min finished Defrost operation.
Control mode one example 3. frost pick-up units place on the pipeline of outdoor heat exchanger, and installed surface is close to tube-surface.When the continuous t1min of frost pick-up unit output frosting signal, and the continuous t2min of temperature sensor is when detecting the pipeline temperature and being lower than T1 ℃, and air conditioner enters Defrost operation.After entering Defrost operation, when the frost pick-up unit detects frostless state and output corresponding signal, finish Defrost operation.
Control mode one example 4.
The frost pick-up unit places on the pipeline of outdoor heat exchanger, and installed surface is close to tube-surface.When the continuous t1min output of frost pick-up unit frosting signal, air conditioner enters Defrost operation.After entering Defrost operation, when the frost pick-up unit detects frostless state and output corresponding signal, finish Defrost operation.
Control mode two examples 1. frost pick-up units place on the restriction device export pipeline, and installed surface is close to tube-surface.Temperature sensor places on the pipeline of indoor heat exchanger.When the continuous t1min of frost pick-up unit output frosting signal, and the continuous t2min of temperature sensor is when detecting the refrigeration system pipeline temperature and being lower than T1 ℃, and air conditioner enters Defrost operation.After entering Defrost operation, when the frost pick-up unit detects frostless state and output corresponding signal, and the continuous t3min of temperature sensor finishes Defrost operation when detecting the refrigeration system pipeline temperature and being higher than T2 ℃.
Annotate: time t, temperature T are looked the refrigeration system of concrete type and are determined.
Above-mentioned listed specific implementation is nonrestrictive, and to one skilled in the art, in not departing from the utility model scope, various improvement and the variation carried out all belong to protection domain of the present utility model.
Claims (10)
1. frost pick-up unit, it is characterized in that: include luminescent device (61) and light receiving element (62), by pedestal (65) as support component, described pedestal (65) is provided with luminescent device installation portion (651), light receiving element installation portion (652) and printed-wiring board (PWB) installation portion (653), and described luminescent device installation portion (651), light receiving element installation portion (652) and printed-wiring board (PWB) installation portion (653) are semi-enclosed cavity; Luminescent device (61) and light receiving element (62) are fixed on pedestal (65) by printed-wiring board (PWB) (63) and go up in the corresponding cavity.
2. frost pick-up unit as claimed in claim 1 is characterized in that: lead (64) transmission of the electric signal of described frost pick-up unit (6) by being connected with printed-wiring board (PWB) (63).
3. frost pick-up unit as claimed in claim 2 is characterized in that: described light receiving element (62) is a light receiving surface towards the one side of luminescent device (61), and described pedestal (65) is provided with light hole (621) near the wall at light receiving surface place.
4. frost pick-up unit as claimed in claim 3, it is characterized in that: described frost pick-up unit (6) also includes the guard (66) and the geometrical clamp (67) of proofing dust and protecting, guard (66) is positioned at outside the pedestal (65), is buckled in position between described luminescent device installation portion (651) and the light receiving element installation portion (652); Geometrical clamp (67) is " U " shape of half-twist, is clamped on the depression position of described luminescent device installation portion (651) and light receiving element installation portion (652) below.
5. frost pick-up unit as claimed in claim 4 is characterized in that: described guard (66) is and covers shape, and is provided with a plurality of mesh, is positioned at the front of described pedestal (65).
6. frost pick-up unit as claimed in claim 5 is characterized in that: the back side in described pedestal (65) is positioned at the installing space that is provided with the frosting body between luminescent device (61), the light receiving element (62).
7. frost pick-up unit as claimed in claim 5 is characterized in that described pedestal (65) is provided with the installed surface (654) of frosting body (8).
8. frost pick-up unit as claimed in claim 3 is characterized in that: described frost pick-up unit (6) utilizes optoelectronic switch D301F31A, and described optoelectronic switch is the U type.
9. heat pump type air conditioner includes control assembly, outdoor heat exchanger (3), outdoor fan, compressor (1), four-way valve (2), indoor heat exchanger (5), indoor fan and restriction device (4); Described outdoor heat exchanger (3), compressor (1), four-way valve (2), restriction device (4) and indoor heat exchanger (5) are connected to form the circulation system of sealing by refrigerant pipe, and refrigerant circulates in the described circulation system; It is characterized in that: described heat pump type air conditioner also include be installed on the circulation system as any one described frost pick-up unit (6) in the claim 1 to 8, described frost pick-up unit (6) is connected with described control assembly circuit, and detected light signal is converted to electric signal is transferred to described control assembly.
10. heat pump type air conditioner as claimed in claim 9 is characterized in that: described indoor heat exchanger (5) is provided with temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200617701U CN201622078U (en) | 2009-08-04 | 2009-08-04 | Frost detection device and heat pump type air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200617701U CN201622078U (en) | 2009-08-04 | 2009-08-04 | Frost detection device and heat pump type air conditioner |
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| Publication Number | Publication Date |
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| CN201622078U true CN201622078U (en) | 2010-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009200617701U Expired - Lifetime CN201622078U (en) | 2009-08-04 | 2009-08-04 | Frost detection device and heat pump type air conditioner |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101988839A (en) * | 2009-08-04 | 2011-03-23 | 珠海格力电器股份有限公司 | Ice frost detection device, heat pump type air conditioner and defrosting 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 |
-
2009
- 2009-08-04 CN CN2009200617701U patent/CN201622078U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101988839A (en) * | 2009-08-04 | 2011-03-23 | 珠海格力电器股份有限公司 | Ice frost detection device, heat pump type air conditioner and defrosting control method thereof |
| CN101988839B (en) * | 2009-08-04 | 2012-09-19 | 珠海格力电器股份有限公司 | Ice frost detection device, heat pump type air conditioner and defrosting 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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| C14 | Grant of patent or utility model | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20101103 Effective date of abandoning: 20090804 |