DK178522B1 - Drying room for drying of pelts - Google Patents
Drying room for drying of pelts Download PDFInfo
- Publication number
- DK178522B1 DK178522B1 DKPA201470152A DKPA201470152A DK178522B1 DK 178522 B1 DK178522 B1 DK 178522B1 DK PA201470152 A DKPA201470152 A DK PA201470152A DK PA201470152 A DKPA201470152 A DK PA201470152A DK 178522 B1 DK178522 B1 DK 178522B1
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- Denmark
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- air
- drying
- openings
- flow
- air flow
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Abstract
A drying room for drying of pelts arranged on pelt boards supported on a plurality of mobile drying manifolds is disclosed, the drying room comprises an air conditioning system having a dehumidifying arrangement for dehumidification of an air flow and control means for selectively adjust a rate of a first air flow from air withdrawal openings inside the room and through the dehumidifying arrangement, and direct said first air flow to the air supply openings, the drying room further comprising a plurality of sensor means for detecting the relative humidity and the temperature of air at various positions inside the room and providing a data output accordingly to the control means, the control means being adapted to adjust said flow rate of the first air flow in response to the data output received from the sensor means.
Description
Drying room for drying of pelts
The present invention relates to drying rooms for drying of mink pelts.
Background
Pelts of fur animals need to be dried after the skinning of the animal prior to the pelt being stored and transported for further processing in order to preserve the pelt and prevent mould in the pelt. The drying of the pelts is preferably conducted with an air flow of a temperature around 20° C and a relative humidity of about 50%. A lower relative humidity will accelerate the drying process but may cause encapsulation of moisture in the middle of the layer of skin and a lower quality of the hair of the pelts.
One solution is disclosed in US patent No. 3, 526, 967 where a drying manifold for supporting a plurality of pelt boards with pelts arranged thereon is provided with air conditioning means for supplying a humidified air flow with controlled temperature and humidity to the drying manifolds and from there into the pelt boards where the air flow dries the pelts. A second air conditioning arrangement is provided for supplying a humidified air flow of controlled temperature to the exterior of the pelts.
An alternative solution is provided with the drying aggregate disclosed in international patent application No. WO 2005/026394 where a drying manifold is supported by wheels and is provided with a blower which ventilates air from the surroundings of the drying aggregate into the manifold and from that out through the pelt boards for drying of the pelts. The drying air flow is not humidified or heated at the drying aggregate itself; instead the drying aggregate is placed in a drying room of a preferred temperature and relative humidity, e.g. 18° C and 55%, respectively.
Such rooms are typically ventilated, i.e. provided with means for withdrawing humid air from the room, ventilation openings for allowing fresh air to enter into the room and heaters and humidifiers for maintaining the preferred temperature and relative humidity of the air inside the room.
Description of the invention
The present invention relates to drying room for drying of pelts arranged on pelt boards supported on a plurality of mobile drying manifolds, the drying room comprises an air conditioning system having a plurality of air withdrawal openings inside the room, a plurality of air supply openings inside the room, at least one air intake opening for environmental air from outside of the room, at least one waste air outlet opening arranged outside of the room, a dehumidifying arrangement for dehumidification of an air flow, heating means for heating of an air flow, ventilation means for driving a flow of air in the air conditioning system, and control means for controlling the operation of the air conditioning system so as to selectively adjust a rate of a first air flow from air withdrawal openings inside the room and through the dehumidifying arrangement, and direct said first air flow to the air supply openings, the drying room further comprising a plurality of sensor means for detecting the relative humidity and the temperature of air at various positions inside the room and providing a data output accordingly to the control means, the control means being adapted to adjust said flow rate of the first air flow in response to the data output received from the sensor means. By recirculating a part of the air from within the room after dehumidifying instead of replacing the air with environmental air substantial energy savings can be obtained as heating and humidifying of environmental air can be reduced. The flow rate of the recirculated air flow from the air withdrawal openings via the dehumidifier and back to the room via the air supply openings is adjusted according to the quality of the air inside the drying room as detected by means of the sensors means arranged inside the room.
Each of said drying manifolds are preferably able to support typically in the range from 100 to 400 pelt boards, normally in the range of 150 to 250 pelt boards, such as about 200.
According to one arrangement of such room, a number of the air withdrawal openings may be directly connected to the waste air outlet whereas the remaining air withdrawal openings are connected to the dehumidifying arrangement from where the withdrawn air flow is recirculated into the drying room. Thus, the arrangement for withdrawing air to the waste air outlet is in this arrangement separated from the dehumidifying arrangement. However, in other embodiments of the present invention, more air withdrawal openings form part of the same withdrawal system from which a part of the air flow is diverted as the first air flow into the dehumidifier.
The control means may further be adapted to selectively adjust a rate of a second air flow from the air intake opening and during operation of the air conditioning system direct said second air flow to the air supply openings, the control means being adapted to adjust said flow rate of the second air flow in response to the data output received from the sensor means. In an alternative arrangement, the low pressure created in the drying room caused by the amount of waste air expelled through the waste air outlet controls the second air flow, possibly assisted by a blower that is not controlled by the control means except in an on/off manner.
The control means are preferably adapted to control the operation of the dehumidifying arrangement and the heating means so as to achieve a desired relative humidity and a desired temperature of the air flow through the air supply openings, i.e. prior to the air flow is being lead into the room through the air supply openings.
The control means are preferably adapted to individually control the flow of air through at least some of said air withdrawal openings in response to data received from the sensor means so that air of a lower quality i.e. with high absolute humidity will be withdrawn and expelled at the waste air outlet, so that the air of higher quality, i.e. with lower absolute humidity either remains in the drying room and is recirculated for drying of pelts by means of blowers arranged on the individual drying manifold or becomes part of said first air flow that is led to the dehumidifying arrangement and is reintroduced into the drying room. These sensor means are preferably arranged in the vicinity of each of the air withdrawal openings that are individually controlled, such as within 100 centimetres from the withdrawal opening. In a particular embodiment, a separate controller is assigned to each of said air withdrawal openings and are adapted to receiving data output from said sensor means in the vicinity of the air withdrawal opening and controlling the flow of air according to the data output. Thus, the controller for each air withdrawal opening may be adapted to operate independently of the remaining controllers.
The flow through each air withdrawal opening may be controlled by means of a valve or throttle or by means of a fan with adjustable rotational speed.
Alternatively, the output data from the plurality of sensor means distributed inside the drying room may be analysed to model the distribution of humidity inside the drying room and may be applied to control the flow through the individual air withdrawal opening.
For this particular embodiment, i.e. with individual control of the air flow through at least some air withdrawal openings, it is preferred that the air withdrawal openings are arranged in two separate flow systems, of which one will only be connected to a waste air outlet opening, whereas the other air withdrawal openings are connected to an inlet of the dehumidifying arrangement where the air from inside the room is dehumidified and possibly admixed with environmental air from the air intake opening and possibly heated by the heating means before being reintroduced into the drying room via the air supply openings.
According to another preferred embodiment, sensor means are provided for each of a plurality of said mobile drying manifolds for sensing relative humidity and temperature of an air flow related to said drying manifold, preferably for each of the mobile drying manifolds within the room. Thereby, data of the air quality inside the drying room are collected at most or all relevant positions; that is where the pelts are being dried.
These sensor means may be provided to sensing relative humidity and temperature of an air flow after it has passed the pelts arranged on pelt boards supported by the mobile drying manifold, either among the pelts on the pelt board or above the pelt boards. According to one particular embodiment, such sensor means are arranged on the mobile drying manifold and will therefore always be present at the correct position with respect to the drying manifold, alternatively, the sensor means are supported elsewhere in the room, such as suspended from the ceiling, above each of the mobile drying manifolds.
Alternatively or additionally, sensor means may be provided to sensing relative humidity and temperature of an air flow before it passes the pelts arranged on pelt boards supported by the mobile drying manifold. The inventor has found that when a blower is installed on each drying manifold for supplying drying air to the pelt boards supported by the manifold, a substantial amount of the drying air is recirculated from the drying air having passed the pelt boards of the same drying manifold and the qualities of that air thus provide information not only about the drying air before it passes the pelt but also on the state of the pelts on the pelt boards of the manifold.
A higher humidity of the drying air of the manifold indicates thus a higher amount of moisture in the pelts supported thereon. In particular, said drying manifolds may each comprises an encapsulation which defines a cavity, said encapsulation comprising an inlet opening for receiving a flow of drying air into the cavity, a support surface with a plurality of board openings suitable for receiving projecting elements of pelt boards for drying of pelts, and a support arrangement for engaging the projecting elements received in the board openings so as to support the pelt board in a predefined angle with respect to the support surface, the board openings being arranged so that said flow of drying air can pass from the cavity out through the board openings and into said pelt boards through projecting elements received in the board openings, wherein the sensor means is provided inside said cavity.
Alternatively or additionally, the sensor means may be provided inside at least one pelt board supported by the mobile drying manifold.
The control means may furthermore be adapted to individually control the flow of air through at least some of said air supply openings in response to data received from the sensor means, so that areas of the drying room or particular drying manifolds may be supplied with e.g. higher amounts of fresh drying air in order to lower the rate of circulation of air within the drying room, i.e. the amount of air that after it has passed a pelt and has taken up moisture from that pelt is drawn back into a drying manifold by a blower arranged on the manifold.
In particular, an air supply opening may be provided for each mobile drying manifold and the control means may be adapted to control the flow of air through the supply openings in response to data received from the sensor means provided for the corresponding mobile drying manifold.
Herein is also disclosed a drying room for drying of pelts arranged on pelt boards supported on a plurality of mobile drying manifolds, the drying room comprises an air conditioning system having a plurality of air withdrawal openings inside the room, at least one waste air outlet opening arranged outside of the room, and ventilation means for driving a flow of air in the air conditioning system, and control means for controlling the operation of the air conditioning system, the drying room further comprising a plurality of sensor means for detecting the relative humidity and the temperature of air at various positions inside the room and providing a data output accordingly to the control means, wherein the control means are adapted to individually control the flow of air through at least some of said air withdrawal openings in response to data received from the sensor means.
These air withdrawal openings are preferably directly connected to the waste air outlet and possible recirculation of withdrawn air that is passed through an dehumidifying arrangement as discussed previously are separately arranged.
Hereby, air of a lower quality i.e. with high absolute humidity may be withdrawn and expelled at the waste air outlet, so that the air of higher quality, i.e. with lower absolute humidity either remains in the drying room and is recirculated for drying of pelts by means of blowers arranged on the individual drying manifold or becomes part of said first air flow that is led to a dehumidifying arrangement and is reintroduced into the drying room.
These sensor means are preferably arranged in the vicinity of each of the air withdrawal openings that are individually controlled, such as within 100 centimetres from the withdrawal opening. In a particular embodiment, a separate controller is assigned to each of said air withdrawal openings and are adapted to receiving data output from said sensor means in the vicinity of the air withdrawal opening and controlling the flow of air according to the data output. Thus, the controller for each air withdrawal opening may be adapted to operate independently of the remaining controllers.
The flow through each air withdrawal opening may be controlled by means of a valve or throttle or by means of a fan with adjustable rotational speed.
Alternatively, the output data from the plurality of sensor means distributed inside the drying room may be analysed to model the distribution of humidity inside the drying room and may be applied to control the flow through the individual air withdrawal opening.
Furthermore is disclosed a drying manifold comprising an encapsulation which defines a cavity, said encapsulation comprising an inlet opening for receiving a flow of drying air into the cavity, an upward-facing support surface with a plurality of board openings suitable for receiving projecting elements of pelt boards for drying of pelts, and a support arrangement for engaging the projecting elements received in the board openings so as to support the pelt board in a substantially right angle with respect to the support surface, the board openings being arranged so that said flow of drying air can pass from the cavity out through the board openings and into said pelt boards through projecting elements received in the board openings, the drying manifold further comprising at least four wheels by means of which the encapsulation is supported, a blower unit for driving a flow of drying air through the inlet opening, and sensor means for detecting the humidity of the flow of drying air and the temperature of the flow of drying air and providing a data output accordingly.
With the sensor means arranged on the mobile drying manifold itself, it can be ensured that the output data obtained always will be obtained at the correct position with respect to the board openings regardless of the placement of the mobile drying manifold and the output data will thus always be comparable to other obtained output data and may therefore be used for control of e.g. the air conditioning system of a drying room with high confidence.
The board openings and support arrangement are preferably suited for cooperating with projecting elements of pelt boards having a rectangular cross section and side lengths of about 20 millimeters and a longitudinal extent of 50 to 70 millimeters.
The drying aggregate may comprise one or more sets of sensors, e.g. a set inside the cavity as well as a set above the support surface so that it during operation of the drying aggregate will detect the quality of the drying air after it has being applied for drying of the pelts arranged on the pelt boards.
The drying aggregate comprises preferably transmitter means arranged for wireless transmission of said data output.
The sensor means may be arranged to detect the humidity and the temperature of the flow of drying air outside of the cavity at a distance from the support surface, such as in the range of 30 to 180 centimetres, preferably in the range of 60 to 150 centimetres, the distance being measured in the same direction as the pelt boards extend from the support surface, typically above the support surface.
The support surface of the drying manifold is preferably suitable for receiving projecting elements of in the range of 100 to 400, preferably in the range of 150 to 250 pelt boards.
A plurality of such drying manifolds may be used in a drying room, where mink pelt are arranged on pelt boards supported by said drying manifolds, where a flow rate of air withdrawn from inside the drying room, passed through a dehumidifying arrangement and supplied back to the inside of the room by means of an air conditioning system is controlled in response to the data output received from the sensor means of the drying manifolds. Also, the drying manifold may be used with the drying room as discussed above.
Yet further is disclosed a pelt board for drying of a pelt, the pelt board comprising an inlet for a flow of drying air connected to openings in a pelt support surface so as to provide said drying air to the skin side of the pelt arranged on the pelt board, the pelt board comprising sensor means for detecting the humidity of the flow of drying air and the temperature of the flow of drying air and provide a data output accordingly.
A pelt board with sensor means arranged inside to measure the qualities of the drying air flowing out to dry the pelt arranged on the pelt board can be used with all known arrangements for drying of pelts to provide reliable data about the drying air to control means of e.g. a drying room or a system for supplying drying air to drying manifolds. The pelt boards may in use be distributed according to a system, e.g. one or two such pelt boards for each drying manifold where the remaining pelt boards are standard pelt boards without sensor means, or the pelt boards with sensor means may constitute a certain fraction of the total number of pelt boards, such as 2 to 4%, so that a satisfactory distribution of pelt boards with sensor means is sufficiently statistical ensured by random selection of pelt boards for e.g. filling drying manifolds.
The transmitter means are preferably arranged for wireless transmission of said data output, e.g. by a standard data exchange protocol, in particular such as short distances data exchange protocols using short-wavelength UHF radio waves in the ISM band from 2.4 to 2.485 GHz, e.g. the so-called Bluetooth protocol.
Furthermore, the pelt board preferably comprises machine-readable identification means which can be read wirelessly, such as Radio Frequency Identification (RFID). Alternatives could be barcodes, colour codes etc. that can be read by a machine to identify that a particular pelt board is situated on an identified drying manifold or another arrangement to support the pelt board.
It is also advantageous that the pelt board comprises a chargeable electric battery for providing electric power to the sensor means and possibly transmitter and machine-readable identification means as well as means for receiving wireless charging of the electric battery, such as by inductive charging means.
A plurality of such pelt boards may be used in a drying room, where mink pelt are arranged on said pelt boards supported by drying manifolds, where a flow rate of air withdrawn from inside the drying room, passed through a dehumidifying arrangement and supplied back to the inside of the room by means of an air conditioning system is controlled in response to the data output received from the sensor means of the pelt boards.
In particular, a plurality of such pelt boards may be used in a drying room as discussed herein.
Description of preferred embodiments
In a preferred embodiment, a drying room according to the present invention comprises room for 10 to 40 mobile drying manifolds, i.e. equipped with wheels, wherein each drying manifold is provided with a blower unit for blowing air from the surroundings into a cavity of the drying manifold and out through the 200 board openings in the upright-facing support surface where pelt boards with pelts arranged thereon are supported. Each drying manifold has sensor means for detecting the relative humidity and the temperature of the drying air inside the cavity and transmitting these data to a central control unit of the drying room. In a particular embodiment, these data also comprises information about the physical location of the drying manifold to enable selective supply of air through the individual air supply openings of the drying room according to the requirements found by the central control unit from said data.
The air conditioning system of the drying room comprises a dedicated waste air system comprising a plurality of air withdrawal openings near a ceiling part of the drying room, wherein the degree of opening of each air withdrawal opening is controlled in accordance with temperature and relative humidity sensor means arranged adjacent to each of the air withdrawal openings in order to ensure that primarily air with the highest moisture content is removed from the drying room through these air withdrawal openings and out to the environment outside the drying room through a waste air outlet. A common waste air blower is arranged to drive the air flow through these air withdrawal openings and out through the waste air outlet. The operation of the waste air blower is controlled by the central control unit.
A second set of air withdrawal openings are arranged in the walls of the drying room for withdrawal of air to be recycled to the drying room after passing a dehumidifying arrangement, being mixed with a flow of environmental air from the outside of the room and passing a heater for heating this flow of drying air, if necessary, before the air is entered into the drying room through a plurality of air supply openings, preferably arranged scattered throughout the room.
The central control unit utilises the data from the sensor means of the drying manifold, i.e. the data for the actual drying air, to control the quality of the air flow that is supplied into the room by means of the air supply openings as well as the operation of the waste air blower in order to achieve satisfactory air quality of the drying air inside the cavities of the drying manifolds, i.e. with a temperature about 20° C and a RF of about 50% while at the same time save energy by recycling air from the second set of the air withdrawal openings, which is warmer than the average air from the environment as well as more humid. In the alternative, where all air supplied to the drying room was obtained from the environment, the supply air would in general require heating as well as moistening, which requires evaporation of water, in order to obtain the required quality of the air supply flow to the drying room.
Claims (10)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DKPA201470152A DK178522B1 (en) | 2014-03-26 | 2014-03-26 | Drying room for drying of pelts |
| DKPA201670023A DK178822B1 (en) | 2014-03-26 | 2016-01-15 | Taner for drying |
| DK201670049 DK178730B1 (en) | 2014-03-26 | 2016-01-29 | Drying manifolds for drying of pelts |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DKPA201470152A DK178522B1 (en) | 2014-03-26 | 2014-03-26 | Drying room for drying of pelts |
| DK201470152 | 2014-03-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DK201470152A1 DK201470152A1 (en) | 2015-05-18 |
| DK178522B1 true DK178522B1 (en) | 2016-05-09 |
Family
ID=53190473
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DKPA201470152A DK178522B1 (en) | 2014-03-26 | 2014-03-26 | Drying room for drying of pelts |
| DKPA201670023A DK178822B1 (en) | 2014-03-26 | 2016-01-15 | Taner for drying |
| DK201670049 DK178730B1 (en) | 2014-03-26 | 2016-01-29 | Drying manifolds for drying of pelts |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DKPA201670023A DK178822B1 (en) | 2014-03-26 | 2016-01-15 | Taner for drying |
| DK201670049 DK178730B1 (en) | 2014-03-26 | 2016-01-29 | Drying manifolds for drying of pelts |
Country Status (1)
| Country | Link |
|---|---|
| DK (3) | DK178522B1 (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2262057A (en) * | 1938-03-07 | 1941-11-11 | William S Shaw | Drying apparatus |
| US2370422A (en) * | 1942-09-22 | 1945-02-27 | Claude R Wickard | Dehydrator |
| US3075297A (en) * | 1958-10-27 | 1963-01-29 | Argabrite | Apparatus for processing leather |
| US3313038A (en) * | 1964-01-09 | 1967-04-11 | Bolz Pelting Service Inc | Pelt drying frame |
| SU1359303A1 (en) * | 1985-01-07 | 1987-12-15 | Ленинградское Проектно-Конструкторское И Технологическое Бюро Легкой Промышленности | Drier for fur skins |
| RU2027768C1 (en) * | 1990-06-15 | 1995-01-27 | Авиационный комплекс им.С.В.Ильюшина | Fur skin drying device |
| DK200201831A (en) * | 2002-11-27 | 2004-05-28 | Majgaard Invest Aps | Stand for drying pelt animal skins has sandwich structure with front side surfaces and first and second side surfaces providing effective aeration facilities for driving of skins pressed onto it |
| WO2005026394A1 (en) * | 2003-09-16 | 2005-03-24 | Majgaard Invest Aps | Method and system for drying out the leather side of a pelt stretched out and fixed in this position on a pelt board |
| KR20120036010A (en) * | 2010-10-07 | 2012-04-17 | 대림산업 주식회사 | Heat and humidity controlled ventilation system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3526967A (en) * | 1969-01-21 | 1970-09-08 | Robert E Bolz | Pelt drying system |
| DK176518B1 (en) * | 2006-01-24 | 2008-06-30 | Dansk Mink Papir As | Device for full or partial emptying / filling of a dryer unit with upright expansion tanks. |
-
2014
- 2014-03-26 DK DKPA201470152A patent/DK178522B1/en not_active IP Right Cessation
-
2016
- 2016-01-15 DK DKPA201670023A patent/DK178822B1/en not_active IP Right Cessation
- 2016-01-29 DK DK201670049 patent/DK178730B1/en not_active IP Right Cessation
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2262057A (en) * | 1938-03-07 | 1941-11-11 | William S Shaw | Drying apparatus |
| US2370422A (en) * | 1942-09-22 | 1945-02-27 | Claude R Wickard | Dehydrator |
| US3075297A (en) * | 1958-10-27 | 1963-01-29 | Argabrite | Apparatus for processing leather |
| US3313038A (en) * | 1964-01-09 | 1967-04-11 | Bolz Pelting Service Inc | Pelt drying frame |
| SU1359303A1 (en) * | 1985-01-07 | 1987-12-15 | Ленинградское Проектно-Конструкторское И Технологическое Бюро Легкой Промышленности | Drier for fur skins |
| RU2027768C1 (en) * | 1990-06-15 | 1995-01-27 | Авиационный комплекс им.С.В.Ильюшина | Fur skin drying device |
| DK200201831A (en) * | 2002-11-27 | 2004-05-28 | Majgaard Invest Aps | Stand for drying pelt animal skins has sandwich structure with front side surfaces and first and second side surfaces providing effective aeration facilities for driving of skins pressed onto it |
| WO2005026394A1 (en) * | 2003-09-16 | 2005-03-24 | Majgaard Invest Aps | Method and system for drying out the leather side of a pelt stretched out and fixed in this position on a pelt board |
| KR20120036010A (en) * | 2010-10-07 | 2012-04-17 | 대림산업 주식회사 | Heat and humidity controlled ventilation system |
Also Published As
| Publication number | Publication date |
|---|---|
| DK178822B1 (en) | 2017-02-27 |
| DK201670023A1 (en) | 2016-01-25 |
| DK201470152A1 (en) | 2015-05-18 |
| DK201670049A1 (en) | 2016-02-08 |
| DK178730B1 (en) | 2016-12-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PBP | Patent lapsed |
Effective date: 20190326 |