TR201707618A2 - Air conditioning unit with current based ice and snow detection and method for operating such an air conditioning unit. - Google Patents

Abstract

The present invention refers to an air conditioning unit (1), in particularly for buildings. The inventive air conditioning unit preferably comprises at least an air conditioning means for heating and/or cooling of air, wherein the air conditioning means comprises a functional fluid and functional means (8, 10), in particular a condenser means (8) for condensing said functional fluid or an evaporator (10) for evaporating said functional fluid or a heat-exchanger for transferring thermal energy from the functional liquid to the surrounding or vice versa, a frost detection means (2) for detecting ice or snow inside or at the outside of the functional means, wherein the frost detection means (2) comprises at least one conductor element (41) for conducting electric energy from a source (70) to an electric energy conducting part (71) of the functional means (8, 10), wherein the conductor element (41) is arranged spaced apart and in close vicinity, in particularly less distance than 10mm, to the electric energy conducting part (71) of the functional means (8, 10), wherein the conductor element (41) and the electric energy conducting part (71) become short-circuited due to growth of ice or snow, and a current measurement and/or detection unit (60) for measuring and/or detecting current flow via the conductor element (41), wherein the measurement and/or detecting unit (60) triggers defrosting in dependency of the measured and/or detected current flow.

Description

DESCRIPTION AIR CONDITIONING UNIT WITH CURRENT BASED ICE AND SNOW DETECTION AND SUCH METHOD FOR OPERATING AN AIR CONDITIONING UNIT The present invention is an air-conditioning unit according to claim 1 and an air-conditioning unit according to claim 14. relates to a method for operating the unit.

Previous Technique In air-conditioning, while the air conditioner is trying to heat, ice in terms of heating mode solving is a big problem, the heat transferred to the outside in the heating mode and the outside of the air conditioner condenser will freeze and heat will not be transferred in this case, heating performance and internal The pressure of the room unit will drop. Therefore, it is very difficult to detect the formation of ice or snow. important and necessary.

Traditionally, temperature sensors (NTCs) are used to initiate defrosting algorithms. It is used to detect cooling conditions, NTC's are ambient and pipe Detects temperature, but humidity for temperatures other than 0°C, 10°C or -10°C cannot be completely precise, as a result of which unsatisfactory results are obtained. can be achieved.

US4305259A describes the cooling of a refrigerator, air conditioner or the like. detecting the amount of ice on the coils and performing a defrosting of the existing ice. occur at regular intervals, when this is not sufficient to confirm its function. prevent future defrosting, therefore defrost heating is necessary a thermistor to limit it to cycles, thus saving electrical energy describes an ice sensor circuit using This is the same amount of ice as the coils. to collect and the defrost cycle control for a certain time interval. by providing energy to melt the ice here and thus reduce the amount of ice formed. by mounting the thermistor on or on coils to determine is being done. 2983/TR Document U83465535A, on the surface of an evaporator Describes an ice detector to detect ice that builds up during the cooling process and the ice detector includes: converting electrical energy into vibrational energy means of sending; receiving means for converting vibrational energy into electrical energy; promise to transmit vibrations from said sending means to said receiving means. a metal wire connecting the transmit and receive means; said wire to said evaporator are positioned adjacent so that ice builds up on the surface in question. reduces the vibration energy in the said receiver vehicle and thus the electricity there causes a decrease in energy output and prevents the defrosting of the evaporator in question. means that responds to said reduction in electrical output energy to start.

Purpose of the Invention Therefore, the object of the present invention is an advanced air conditioning unit and snow and ice. an air-conditioning unit in such a way that its formation can be reliably detected. is to provide a method to operate.

Description of the Invention A cooling unit for the above-mentioned purpose, in particular cooler or according to claim 1 It can be reached by air conditioning unit. The air-conditioning unit, in other words, is a fixed The air conditioning unit is preferably for buildings. The cooling unit, which is the subject of the present invention, especially the air conditioning unit preferably at least for heating and/or cooling the air. includes a conditioning means, wherein the conditioning means is a functional fluid and functional tool, specifically a tool for concentrating that functional fluid condenser means or an evaporator to evaporate said functional fluid or a functional fluid to transmit thermal energy to the environment and vice versa. contains a heat exchanger and contains ice or snow inside or outside the functional vehicle. includes an ice detecting tool to detect to transmit its energy from a source to the electrically energized part of the functional device. comprises at least one conductive element, wherein the conductive element is the electrical element of the functional device. in close proximity to the energy-transmitting part, preferably less than 10 mm and spaced apart, wherein the conductive element and the electrically conductive part 2983/TR is short-circuited by the build-up of ice or snow and current through the conductive element includes a current measurement and/or detection unit to measure and/or detect the flux, where the measuring and/or detection unit is based on the measured and/or detected current flow triggers the defrosting process.

This solution is useful because using conductive materials (e.g. rod or ring etc.) It gives full results in terms of detecting ice.

Other preferred embodiments include the following specification sections and/or dependent subject of claims.

According to a preferred embodiment of the present invention, the conductive element has a rod-like It has a shape and is parallel to the electrical energy-conducting part of the functional vehicle. are held. This application can reliably and inexpensively use a conductive rod. It is useful because it can be provided. In addition, due to mechanical positioning, the conductive element and the distance between the functional means can be established very precisely. Conductive the formation of ice or snow in a space between the element and the functional tool, causes an electrical connection to be established between the vehicle and an electrical source, therefore, the current flowing in said connection can be measured.

The conductive element is ring-like according to another preferred embodiment of the present invention. has a shape and is similar to or electrically conductive rod of a functional vehicle. It is arranged around a pipe-like element that transmits energy. This application is a ring element pipe-like or rod-like element of functional device surrounding the circumferential surface of the element in question so that the ice or snow plus It is also useful because it can be detected throughout. This application can also be used for increasing ice or The size of the connection and hence the current flow caused by snow is a predetermined It is useful because it can be analyzed in addiction.

According to another preferred embodiment of the present invention, the conductive element is preferably flat. It has a rod-like shape and is aligned with the electrically conductive part of the functional vehicle. are arranged in such a way that one end of the conductive element and the functional means the distance between the electrical energy transmitting part and the other end of the conductive element 2983/TR the distance between the electrical energy-conducting part of the functional tool is different from each other.

This practice depends on the size of the connection and therefore the flow caused by increased ice or snow. It is useful because its flow can be analyzed in a predetermined dependency. the conductive element has a ring-like shape according to another embodiment of the present invention. has a functional device similar to a rod that conducts electrical energy or non-coaxially around a conducting pipe-like element are held. The size of the connection caused by increased ice or snow and hence the current flow can be analyzed in a predetermined dependency it is useful.

According to another embodiment of the present invention, the conductive element has a heterogeneous structure, where thickness, material composition and/or shape along a longitudinal axis or changes in an environmental direction. One, two, three or more of these features excess and/or shape and/or position and/or size of ice or abdomen This application is useful because it can be affected. The flow of the mind, one of these features, analysis with a predetermined dependence on two, three, or more can be achieved.

Therefore, a conductive rod, ring or any conductive material is preferably a disc unit. It is located at the bottom of the condenser (in the efficient zone of the condenser) and preferably keeping the conductive element close to the condenser at optimum distance and without contact are held by means of plastic holders. As the icing begins, on the conductor bar The condenser is short-circuited due to icing and the conductor bar is not current sensing. Defrosting by sensing current flow from source to ground via circuit starts the algorithm.

Multiple conductive elements according to another preferred embodiment of the present invention are provided and connected to the current measurement and/or detection unit one by one. This application, ice or snowfall in multiple positions and/or multiple functional It is useful because it can be detected on/in the vehicle. In addition, a measurement and/or detection The signals and data provided by the unit are preferably based on each transmission element. can be analysed. In addition, multiple or all conductive elements or conductors 2983/TR predetermined signals or data showing the current flow of all the elements. It can also be considered to be analyzed in some way.

Signals or data provided by the measurement and/or detection unit according to another preferred embodiment, via a predetermined algorithm. is processed, where triggering the defrosting process depends on the processed signals or data. is provided as attached. Signals provided by the measuring and/or detection unit or data preferably depending on the position and/or properties of the respective conductive element is being processed. Features, eg size, shape, material, distance from functional tool etc. can happen.

According to the present invention, the air conditioning unit defrosts one or more functional vehicles. at least one heating means, in particular an electric heating means. This application, since there is no need to lower the power level, the air conditioner It is useful because the output is not affected. Heating device preferably with multiple steps or stepless It will be operated as it will be. Preferably more than one heating device is provided, here at least two heaters can be operated independently of each other, each of the two heating means to the signals provided by the measuring and/or detection means or operated based on data.

According to another preferred embodiment of the present invention, the conductive medium is at least one positioned via an electrically insulated holding element, where insulating holding element less than 10'58/m (siemens per meter) especially 10'68/m” less or less than 10'7S/m or less than 10'BS/m has. Therefore, the electrical conductivity of the holding element is preferably made of ice or snow. lower than electrical conductivity. minimum between the conductive element and the electrically energized part of the functional device. distance is less than 5mm according to another preferred embodiment of the present invention, especially less than 3 mm or less than 2 mm or less than 1 mm, especially 0.001 Between mm and 10 mm or between 0.1 mm and 5 mm or between 0.5 mm and 3 mm are in between. 2983/TR For the above-mentioned purpose furthermore, a fixed air-conditioning unit according to claim 14. accessed by a method to operate. The above-mentioned method is preferably the most It includes at least the following steps: An air conditioner for heating and cooling the air provision of means, where the conditioning agent is a functional fluid and functional vehicle, in particular a condenser or a valve to concentrate the functional fluid in question. an evaporator or functional fluid to evaporate the functional fluid in question. a heat exchanger to transmit thermal energy from the fluid to the environment and vice versa includes a device for detecting ice or snow inside and outside the functional vehicle. providing an ice detecting tool, wherein the ice detecting tool is from a source to a functional tool at least one conductive element for transmitting electrical energy to the electrically conducting element where the conductive element is connected to the electrically conductive part of the functional device. at close range, especially at a distance of less than 10 mm and intermittently are arranged, to provide heated air to heat a predetermined area operation of the air-conditioning device, where the conductive element and the electrical energy-conducting the piece is short-circuited by a build-up of ice or snow, flowing through the conductive element measuring and/or detecting the current by means of a current measuring and/or detection unit, triggering the defrosting process based on the measured and/or detected current flow.

Therefore, the current invention is to detect ice and snow using any conductive material. According to another embodiment of the present invention, defrosting is a functional vehicle. causes a decrease in the level of work. This application is connected to another heating device. It is useful because it is not needed.

Air conditioners are the main application of this invention. Furthermore, the invention preferably includes any It can be used in other defrosting application areas.

Other benefits, objects and features of the present invention are examples of components of the invention. will be explained through the following explanation of the attached figures. At least the function Components of systems, devices, and methods according to inventions that essentially overlap may be marked with the same reference mark, wherein such components are in the figures in question does not have to be marked or explained. 2983/TR The invention is described below by way of example only, according to the accompanying drawings.

Brief Description of Figures Figure ta shows a connection between a source and an outdoor unit of an air conditioning unit. shows the electrical connection schematically, where the connection is increased ice or short circuit between a rod-like conductive element and the outdoor unit through snow is established as; Figure 1b is a refrigerated unit of an outdoor unit of a source and an air-conditioning unit. schematically shows an electrical connection between a ring-shaped conductive element and outer connection through increasing ice or snow it is installed as a short circuit between the unit; Figure 2a schematically illustrates a preferred arrangement in an air conditioning device. wherein a rod-like conductive element is a rod-like a gap between the conductive element and a functional means of the air conditioning unit It is organized in such a way that; and Figure 2b illustrates another preferred arrangement in an air conditioner. shows schematically, where multiple rod-like conductors element, rod-like conductive elements and a are arranged such that gaps exist between the functional agents, where Each conductive element has different properties as examples.

Detailed Description of Figures Figure 1a shows a outer part (20) of an air conditioning unit (1). at least one the conductive element (41) is arranged in the immediate vicinity of the outer part (20). ice or snow ice or snow between outer piece (20) and conductive element (41) creates a link. Therefore, the current is transmitted to the outer part through the conductive element (41). (20) is flowable and the outer part (20) is preferably connected to the ground. a source of wisdom (70) is provided by. Between the source (70) and the conductive element (41) preferably the most A minor current limiter (40) and a current measuring and/or detecting unit (60) are provided. 2983/TR The current measuring and/or detection unit is preferably closer to the source (70) than the current limiter (40). closely held.

Figure 1b shows a similar structure to Figure 1a. However, the conductive element (41) is in the form of a ring and consists of a tube or piston or rod-like element (71). is located around it. One or more electrically isolated grips intermediary (72) conductive element (41) pipe or piston or rod-like element (71) keeps it at a certain distance. Ring (41) through connection (44) with a weld (70) electrically connected, where a current limiter (40) and/or a current measuring device and the fixing unit (60) is preferably arranged between the source (70) and the ring (41).

Thus, the connection between the current conducting element 41 and the functional tool is established. It can be measured as soon as it is installed, in other words, it can be detected.

Therefore, the main concept of this invention, especially on the functional device (condenser, exchanger, evaporator coil, etc.) is to detect ice anywhere, that is, the conductive element(s), especially the conductive rod or ring is used to detect. When ice build-up starts on the condenser, the conductor element, i.e. rod or ring, is very close to this material, therefore is short-circuited by icing and the current flows from the source to the ground. It is detected by a circuit that can detect it. Therefore, at least one functional vehicle, especially condenser or evaporator etc. `indicating that there is ice on it provided as a signal or data output.

Figure 2a is a schematic view of a cross-sectional view of a part of an air conditioning unit (1). shows as. A rod-like or ring-like conductive element (41) is a arranged in the condenser 8, where an electrically isolated holding The means (54) positions the conductive means (41) at a certain distance (49) from the condenser (8).

Figure 2b shows as an example that multiple conductive elements (41, 42, 43) can be provided. shows. Preferably, all conductive elements or multiple conductive elements or most of the conductive elements are connected to the same source and/or current measurement and detection unit.

However, each conductive element has a separate connection and a separate source, current It is also possible to connect it to a limiter and a current measuring and/or detection unit. same type 2983/TR It is also possible to provide more than one conductive element. One type of these is associated with Figure 1a. while another type is described in relation to Figure 1b. Moreover, every type, with a heterogeneous distance profile relative to the functional means of the air conditioning unit (1) can be edited. Another type of conductor is that the surface of the respective conductive element may be varied. preferably different electrical conductivity and/or surface strength and/or multiple materials with wetting properties and/or surface shape contains.

Therefore, the present invention relates in particular to an air conditioning unit 1 for buildings.

The air conditioning unit, which is the subject of the present invention, is preferably used for heating the air and/or includes at least one air conditioning means for cooling, wherein the air conditioning means is a functional fluid and functional tool (8, 10), especially the functional fluid in question a condenser means ( 8) or the functional fluid in question to concentrate to evaporate from an evaporator (10) or functional fluid to the environment or full Conversely, it contains a heat exchanger to transmit thermal energy and is a functional vehicle. includes an ice detection tool (2) for detecting ice or snow inside or outside, wherein the ice detecting means (2) transmits electrical energy from a source (70) to the functional means (8, 10). at least one conductive element (41) for transmitting electrical energy to the part (71) that transmits energy wherein the conductive element (41) conducts electrical energy of the functional means (8, 10). part 71, preferably less than 10 mm, and spaced apart in which the conductive element (41) and the electrical energy-conducting part (71) is short-circuited by the build-up of ice or snow, and through the conductive element (41) a current measurement and/or detection unit (60) for measuring and/or detecting the current flow wherein the measuring and/or detecting unit (60) measures the measured and/or detected current. It triggers the defrosting process depending on the flow.

List of reference numbers air conditioning unit condenser evaporator disc piece current limiting conductive element other conductive element additional conductive element connection for transmitting electrical energy first material second material third material space alternative space first end of conductive element second end of conductive element current measurement and/or detection unit refrigerated part of functional vehicle insulating element heating medium

Claims (15)

1. Air conditioning unit (1), in particularly for buildings, at least comprising an air conditioning means for heating and/or cooling of air, wherein the air conditioning means comprises a functional fluid and functional means (8, 10), in particular a condenser means (8) for condensing said functional fluid or an evaporator (10) for evaporating said functional fluid or a heat-exchanger for transferring thermal energy from the functional quuid to the surrounding or vice versa, a frost detection means (2) for detecting ice or snow inside or at the outside of the functional means, wherein the frost detection means (2) comprises at least one conductor element (41) for conducting electric energy from a source (70) to an electric energy conducting part (71) of the functional means (8, 10), and wherein the conductor element (41) is arranged spaced apart and in close vicinity, in particularly less distance than 10mm, to the electric energy conducting part (71) of the functional means (8, 10), wherein the conductor element (41) and the electric energy conducting part (71) become short-Circuited due to growth of ice or snow, and a current measurement and/or detection unit (60) for measuring and/or detecting current flow via the conductor element (41), wherein the measurement and/or detecting unit (60) triggers defrosting in dependency of the measured and/or detected current flow.

2. Air conditioning unit according to claim 1, characterized in that the conductor element (41) has a rod-like shape and is arranged in paraIIeI to the electric energy conducting part (71) of the functional means (8, 10).

3. Air conditioning unit according to claim 1, characterized in that the conductor element (41) has a ring-like shape and is arranged around an electric energy conducting rod-like or electric energy conducting pipe-Iike member of the functional means.

4. Air conditioning unit according to claim 1, characterized in that the conductor element (41) has a preferably straight rod-Iike shape and is arranged in an aligned manner to the electric energy conducting part (71) of the functional means (8, 10), wherein the distance between one end (50) of the conductor element (41) and the electric energy conducting part (71) of the functional means (8, 10) and the distance between another end (52) of the conductor element (41) and the electric energy conducting part (71) of the functional means (8, 10) differ from each other.

5. Air conditioning unit according to claim 1, characterized in that the conductor element (41) has a ring-like shape and is arranged in a none-coaxial manner around an electric energy conducting rod-Iike or electric energy conducting pipe- like member of the functional means (8, 10).

6. Air conditioning unit according to any of the proceeding claims, characterized in that the conductor element (41) has a heterogenous structure, wherein the thickness, material composition and/or shape varies along a longitudinal axis or a circumferential direction.

7. Air conditioning unit according to any of the proceeding claims, characterized in that multiple conductor elements are provided and individually connected to the current measurement and/or detection unit.

8. Air conditioning unit according to any of the proceeding claims, characterized in that signals or data provided by the measurement and/or detecting unit (60) are processed by means of a predefined algorithm, wherein triggering of defrosting is caused in dependency of the processed signals or data.

9. Air conditioning unit according to claim 8, characterized in that signals or data provided by the measurement and/or detecting unit (60) are processed in dependency of the position and/or features of the respective conductor element (41 ).

10. Air conditioning unit according to any of the proceeding claims, characterized in that the air conditioning unit (1) comprises at least one heating means (74), in particularly an electric heating means, for defrosting of one or multiple functional means (8, 10).

11. Air conditioning unit according to claim 10, characterized in that multiple heating means (74) are provided, wherein at least two heating means (74) can be operated independently from each other, wherein each of said two heating means is operated in dependency of the signals or data provided by the current measurement and/or detection unit (60).

12. Air conditioning unit according to any of the proceeding claims, characterized in that the conducting means (41) is positioned by means of at least one electrically isolated holding member, wherein the isolated holding member has an electrical conductivity of less than 10'5S/m (siemens per meter), in particular of less than 10'68/m or of less than 10'7S/m or of less than 1O'SS/m.

13. Air conditioning unit according to any of the proceeding claims, characterized in that the minimal distance between the conductor element (41) and the electric energy conducting part (71) of the functional means is below 5mm, in particular below 3mm or below 2mm or below 1 mm.

14. Method for operating a stationary air conditioning unit, Providing an air conditioning means (1) for heating and cooling of air, wherein the air conditioning means (1) comprises a functional fluid and functional means (8, 10), in particular a condenser means (8) for condensing said functional fluid or an evaporator (10) for evaporating said functional fluid or a heat-exchanger for transferring thermal energy from the functional quuid to the surrounding or vice versa, Providing a frost detection means (2) for detecting ice or snow inside or at the outside of the functional means (8, 10), wherein the frost detection means (2) comprises at least one conductor element (41) for conducting electric energy from a source (70) to an electric energy conducting part of the functional means (8, 10), wherein the conductor element (41) is arranged spaced apart and in close vicinity, in particularly below a distance of 10mm, to the electric energy conducting part of the functional means, Operating the air conditioning means (1) to provide heated air for heating a predefined wherein the conductor element (41) and the electric energy conducting part become short- circuited due to growth of ice or snow, Measuring and/or detecting by means of a current measurement and/or detection unit (60) current flowing through the conductor element (41 ), Triggering defrost operation in dependency of the measured and/or detected current flow.

15. Method according to claim 14, characterized in that the defrost operation causes a reduction of the operation level of the functional means (8,