CN111306654B - Thermoelectric dehumidifying device - Google Patents
Thermoelectric dehumidifying device Download PDFInfo
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- CN111306654B CN111306654B CN201811518802.6A CN201811518802A CN111306654B CN 111306654 B CN111306654 B CN 111306654B CN 201811518802 A CN201811518802 A CN 201811518802A CN 111306654 B CN111306654 B CN 111306654B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
- F24F2003/144—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by dehumidification only
- F24F2003/1446—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by dehumidification only by condensing
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)
- Drying Of Gases (AREA)
Abstract
The invention discloses a thermoelectric dehumidification device, comprising: the thermoelectric element is provided with a cold end surface and a hot end surface, the condensing fin group is connected with the cold end surface, the bottom side of each condensing fin of the condensing fin group is gradually inclined downwards, the heat radiating fin group is connected with the hot end surface, and the fan is arranged between the second air inlet and the heat radiating fin group; through the inclined design of the bottom side of each condensing fin, water drops condensed on the condensing fins after air flow enters the shell can quickly slide off, and the dehumidified low-temperature air flow is mixed with the external air flow entering from the second air inlet and then is pushed by the fan to pass through the heat dissipation fins, so that heat energy on the heat dissipation fins is effectively taken away, and the dehumidification effect of the thermoelectric dehumidification device is improved.
Description
Technical Field
The present invention relates to a thermoelectric dehumidifier, and more particularly, to a thin thermoelectric dehumidifier which is used for indoor dehumidification and has higher dehumidification efficiency than the conventional thermoelectric dehumidifier.
Background
Generally, a conventional dehumidifier uses a compressor to push a refrigerant to circulate in a pipeline including a condenser and an evaporator, liquid and gas changes due to pressure difference, at the evaporator, when the refrigerant is evaporated from liquid to gas in a pipe, the refrigerant absorbs heat, the temperature of air sucked from the outside and flowing through the outside of the pipe is reduced, moisture in the air is condensed into water drops due to temperature reduction and is discharged, and the air after moisture removal cools a high-temperature refrigerant which is just compressed and sent by the compressor at the condenser, so that dry air is heated and then discharged to the outside, and the moisture contained in the air in an indoor space is removed by the way of circulation. However, this dehumidifier must have a considerable volume and weight in order to accommodate the compressor, condenser and evaporator therein, and cannot be used in a small-space wardrobe or shoe chest.
In order to solve the problem of the oversize volume of the dehumidifier, manufacturers replace the design of the compressor with a Thermoelectric Cooling Module (Thermoelectric Cooling Module), as shown in the JPH06-163997 patent publication, please refer to fig. 1, the thermoelectric cooling chip in the thermoelectric device 21 of the publication is to fixedly arrange the N-type semiconductor 24 and the P-type semiconductor 26 connected in series between two thermoelectric conductors 28, and by providing a current to the N-type semiconductor 24 and the P-type semiconductor 26, carriers with energy in the current move to the thermoelectric conductor 28 on the same end face through the serial connection design of the N-type semiconductor 24 and the P-type semiconductor 26 and accumulate on the thermoelectric conductor 28 on the end face, so as to raise the temperature of the thermoelectric conductor 28 on the end face, and becomes a hot end face, and the thermoelectric conductor 28 on the other end face becomes a cold end face because all the carriers with energy in the current are far away from the hot end face. In the design of the dehumidification mechanism, the air flow entering the dehumidification machine firstly passes through the cold end surface of the thermoelectric refrigeration chip to reduce the temperature, so that the water vapor in the air flow is condensed into water drops on the cold end surface and is discharged, and the dehumidified cold air flow passes through the hot end surface of the thermoelectric refrigeration chip to take away the heat energy on the hot end surface and is discharged to the outside.
When the thermoelectric cooling chip is not electrified, the cold end face and the hot end face are isothermal, and after the thermoelectric cooling chip is electrified, the energy of the cold end face is carried to the hot end face by carriers in current, so that when the coldness of the cold end face is closer to the temperature of condensed water vapor, the heat energy reduced by the cold end face is accumulated and increased on the hot end face, but the heat energy which can be taken away by the dehumidified cold air flow is limited due to the volume relation, when the temperature difference between the conduction cooling end face and the hot end face is large, the cold end face cannot transfer the heat energy to the hot end face to cool, and the effect of the cold end face condensed water vapor is naturally poor. To improve this drawback, the patent discloses introducing an air flow from the outside before the dehumidified cold air flow enters the hot end face, mixing the cold air flow with the outside air, and then increasing the volume of the air flow, thereby increasing the volume of the air flow capable of transferring the heat energy of the hot end face. The design of this patent publication is that an opening 31 is provided at the front side of the hot end face where the air flow enters, and a cross flow fan 29 is provided at the air outlet where the air flow passes through the hot end face and is then discharged to the outside, and by the suction effect of the cross flow fan 29, the outside air enters the dehumidifier through the opening 31 to become a second air flow, and passes through the hot end face after being mixed with the dehumidified cold air flow, so as to carry away the heat energy of the hot end face. The air flow generated by the cross flow fan 29 in a suction manner is characterized in that the air flow is a bundle of flat and stable air flows, that is, the cross section and the shape of the air flow are fixed, so that the mixed air flow formed by the second air flow and the cold air flow sucked by the cross flow fan 29 is a flat and stable mixed air flow; when the mixed gas flow passes through the hot end face, the heat energy can be taken away by the mixed gas flow only at the intersection of the hot end face and the cross section of the mixed gas flow, so that the heat dissipation effect of the hot end face is still limited, and when the heat dissipation effect of the hot end face is limited, the cooling effect of the cold end face of the thermoelectric refrigeration chip is also limited, so that the efficiency of the cold end face condensed water and gas is poor, and the dehumidification effect is influenced.
In order to increase the contact area between the cold end surface and the hot end surface of the thermoelectric cooling chip and the air stream, the patent discloses that the cold end surface of the thermoelectric cooling chip is connected with a plurality of fins 23, the top side of the fins 23 is connected with the cold end surface, the bottom side of the fins 23 is a free side extending downwards, and the hot end surface of the thermoelectric cooling chip is similarly connected with a plurality of fins 23. When the air flow entering the dehumidifier passes through the fins 23 connected to the cold end face, the air flow lowers the temperature of the air in the air flow by making large-area contact with each of the fins 23, so that the moisture in the air flow condenses into water droplets on the fins 23, and the water droplets slide down in the direction of the free side of the fins 23 by the weight of the water droplets to leave the fins 23. However, since the water droplets on the fins 23 slide on the respective fins, when the water droplets after condensation slide close to the top sides of the fins 23, the water droplets are light in weight and slow in sliding speed, and when the water droplets continuously collide with other condensed water droplets on the same fins in the sliding process and are combined into heavy water droplets, the sliding speed of the water droplets is increased. However, in the process of the water drops sliding slowly, the air flow still passes through the fins 23, and when the air flow passes through the position covered by the water drops, the air flow cannot contact the fins at the position, so that the air flow cannot be cooled smoothly and the water drops are condensed on the fins, and the dehumidification effect of the air flow entering the dehumidifier is still poor.
Disclosure of Invention
In view of the above, the main object of the present invention is to provide a thermoelectric dehumidifying device, which is suitable for being placed in a small gap space for dehumidification, by the design that the casing and the air inlet/outlet are located on the short side of the casing, so that the whole body tends to be a roughly flat cube; the invention utilizes the position of the fan to increase the heat dissipation effect of the hot end surface of the thermoelectric element, so that the cold end surface is kept at a good dehumidification temperature, and the dehumidification capability is improved; and the bottom sides of the condensing fins are gradually inclined downwards along the flowing direction of the air flow and have height difference with the bottom sides between the adjacent condensing fins, so that the sliding and sliding speeds of water drops on the condensing fins are accelerated, the sliding efficiency of the water drops of the condensing fins is improved, and the integral dehumidification effect of the thermoelectric dehumidification device is further improved.
To achieve the above object, the present invention discloses a thermoelectric dehumidifying device, which at least comprises a housing, a thermoelectric element, a first air inlet, a second air inlet, an air outlet, a condensing fin set, a heat dissipating fin set and a fan, wherein the shell at least has a first side surface and a second side surface, the first side surface and the second side surface are oppositely arranged with a first distance, and the length of the first side surface in the horizontal direction and the length of the second side surface in the horizontal direction are larger than the distance of the first interval, the thermoelectric element is arranged between the first side surface and the second side surface, an upper air duct and a lower air duct are separated between the first side surface and the second side surface, one end of the upper air duct is communicated with one end of the lower air duct, the thermoelectric element is provided with a cold end surface and a hot end surface, the cold end surface is positioned in the lower air duct, and the hot end surface is positioned in the upper air duct; the first air inlet, the second air inlet and the air outlet are arranged on the shell, wherein the first air inlet is communicated with the other end of the lower air duct, the second air inlet is communicated with the end of the upper air duct, and the air outlet is communicated with the other end of the upper air duct; the condensing fin group comprises a plurality of condensing fins, each condensing fin is approximately parallel to the first side surface and is arranged in the lower air duct at intervals, the top side of each condensing fin is connected to the cold end surface of the thermoelectric element, the bottom side of each condensing fin, which is far away from the cold end surface, is a free side, and the bottom side of each condensing fin is gradually inclined downwards towards the direction far away from the first air inlet; the heat radiating fin group comprises a plurality of heat radiating fins, each heat radiating fin is approximately parallel to the first side face and is arranged in the upper air channel at intervals, the bottom side of each heat radiating fin is connected to the hot end face of the thermoelectric element, and the fan is fixedly arranged in the upper air channel and is positioned between the second air inlet and the heat radiating fin group.
The invention has the advantages that through the structure, the length of the two opposite side surfaces of the shell in the horizontal direction is different from the first distance between the two opposite side surfaces, the air outlet and the air inlet are positioned between the first distances, so that the thermoelectric dehumidification device is in a flat cube and is suitable for being placed in a small gap space for dehumidification, and a fan arranged between the second air inlet and the heat dissipation fin group pushes a rotating airflow mixed by an external air airflow and a dehumidified cold air airflow to pass through the heat dissipation fins, so that the heat energy of the heat dissipation fins and the hot end surfaces of the thermoelectric refrigeration chips can be effectively taken away, and the low temperature of the condensation fins and the dehumidification capability of condensed water drops are kept; in addition, the bottom side of each condensing fin is designed to be gradually inclined downwards along the flowing direction of the air flow, so that the water drops condensed on each condensing fin slide downwards along the downward inclined direction and are combined with the water drops formed by the condensing fin or the adjacent condensing fins as quickly as possible to form heavy water drops, and the water drops slide downwards quickly, so that the dehumidification effect of the air flow entering the dehumidification device is improved.
Drawings
FIG. 1 is a schematic view of a dehumidifier disclosed in JPH06-163997 patent publication.
Fig. 2 is a perspective view of the present invention.
Fig. 3 is a perspective view from another perspective of the present invention.
Fig. 4 is a perspective view of the internal configuration of the present invention.
FIG. 5 is a schematic plan view of the upper duct, the lower duct and the connecting duct of the present invention.
Fig. 6 is a schematic plan view of the internal configuration of the present invention.
FIG. 7 is a perspective view of the thermoelectric element of the present invention connected to a cooling fin set and a condensing fin set.
FIG. 8 is a schematic view of the cross-sectional area of the fan and the cross-sectional area of the cooling fin assembly according to the present invention.
FIG. 9 is a schematic view of the combination of the sliding and touching of the water droplets in the condensing fin set according to the present invention.
Fig. 10 is a partially enlarged schematic view of fig. 9.
Fig. 11 is a schematic view of an air flow path of the dehumidifying apparatus of the present invention.
Fig. 12 is a schematic plan view of an internal configuration according to another embodiment of the present invention.
Description of reference numerals:
21: thermoelectric device
23: fin
24: n-type semiconductor
26: p-type semiconductor
28: thermoelectric conductor
29: cross flow fan
31: opening part
100: thermoelectric dehumidifying device
10: shell body
101: first side surface
1011: length of
102: second side surface
1021: length of
103: third side
104: the fourth side
105: upper air duct
106: lower air duct
107: connecting air duct
108: first guide plate
109: second guide plate
110: third guide plate
20: thermoelectric element
201: cold end face
202: hot end face
30: a first air inlet
40: second air inlet
50: air outlet
60: condensing fin group
601: long condensing fin
601 a: top side
601 b: bottom side
602: short condensing fin
602 a: top side
602 b: bottom side
70: radiating fin group
701: bottom side
80: fan with cooling device
d 1: first interval
d 2: fin gap
d 3: height difference
A: air flow
B: low temperature air flow
C: ambient air flow
D: mixed gas flow
E: hot air flow
Detailed Description
In order to clearly illustrate the present invention, a number of embodiments will now be described in detail with reference to the accompanying drawings.
Referring to fig. 2 to 8, the thermoelectric dehumidifying apparatus 100 of the present invention at least includes a housing 10, a thermoelectric device 20, a first air inlet 30, a second air inlet 40, an air outlet 50, a condensing fin set 60, a heat dissipating fin set 70 and a fan 80, wherein the first air inlet 30, the second air inlet 40 and the air outlet 50 are disposed in the housing 10, and the thermoelectric device 20, the condensing fin set 60, the heat dissipating fin set 70 and the fan 80 are disposed in the housing 10.
The casing 10 at least includes a first side 101, a second side 102, a third side 103 and a fourth side 104, wherein the first side 101 and the second side 102 are oppositely disposed at a first distance d1, a horizontal length 1011 of the first side 101 and a horizontal length 1021 of the second side 102 are greater than the distance d1, the third side 103 and the fourth side 104 are disposed between the first side 101 and the second side 102 and are respectively connected with the first side 101 and the second side 102, in this embodiment, a ratio between the length 1011(1021) and the first distance d1 is 3:1 to 4:1, so that the casing 10 is a slightly flat cube, and is favorable for being placed in a small-gap space such as a wardrobe, a shoe cabinet and the like; the air outlet 50 and the first air inlet 30 are disposed on the third side 103 in a vertical parallel manner, and the second air inlet 40 is disposed on the fourth side 104.
Referring to fig. 2 to 6, the thermoelectric element 20 is disposed between the first side 101 and the second side 102, and is divided into an upper air duct 105 and a lower air duct 106 adjacent to each other up and down in an area surrounded by the first side 101, the second side 102, the third side 103, and the fourth side 104 of the housing 10, one end of the upper air duct 105 is connected to one end of the lower air duct 106 and is connected to two ends of a connecting air duct 107, respectively, wherein a plurality of first baffles 108 are disposed along a peripheral wall of the connecting air duct 107, so that the connecting air duct 107 is hollow and has two open ends, one end of each of the connecting air ducts is connected to one end of the upper air duct 105, and the other end of each of the connecting air ducts is connected to one end of the lower air duct 106, so as to communicate the upper air duct 105 and the lower air duct 106, and guide an air flow from the lower air duct 106 to the upper air duct 105, and in this embodiment, the connecting duct 107 is disposed adjacent to the fourth side 104.
A second baffle plate 109 is arranged between the first air inlet 30 of the third side surface 103 and the other end of the lower air duct 106 to communicate the first air inlet 30 with the lower air duct 106 and guide the air flow from the first air inlet 30 to the lower air duct 106; a third baffle 110 is disposed between the air outlet 50 of the third side 103 and another end of the upper duct 105 to connect the air outlet 50 and the upper duct 105, and guide the air flow from the upper duct 105 to the air outlet 50.
Referring to fig. 6 and 8, the fan 80 is fixedly disposed in the upper air duct 105 adjacent to the fourth side surface 104 and located between the second air inlet 40 and the heat dissipating fin set 70, wherein the air flow cross-sectional area of the fan 80 is substantially the same as the cross-sectional area of all the heat dissipating fins 701 arranged in parallel, so that the air flow pushed by the fan 80 can just completely pass through the plurality of heat dissipating fins 701, thereby improving the utilization rate of the air flow of the fan 80 and reducing the waste in efficiency.
Referring back to fig. 7, in the present embodiment, the condensing fin set 60 may be formed by integrally molding a structure in which the top sides 601a of the long condensing fins 601 and the top sides 602a of the short condensing fins 602 are connected to each other and the long condensing fins 601 and the short condensing fins 602 are arranged in parallel and at intervals in a staggered manner, so as to transmit the temperature of the cold end surface 201 to each long condensing fin 601 and each short condensing fin 602 by closely attaching the top sides to the cold end surface 201; similarly, the heat dissipating fin set 70 may also be formed by integrally molding a structure in which the bottom sides 701a are connected to each other and each heat dissipating fin 701 is disposed in parallel at an interval, so as to conduct the temperature of the hot end surface 202 to each heat dissipating fin 701 by the close contact between the bottom sides and the hot end surface 202.
In addition, referring to fig. 6, in the present embodiment, the bottom sides 601b of the long condensing fins 601 and the bottom sides 602b of the short condensing fins 602 are gradually inclined downward from the vicinity of the first air inlet 30 toward the direction away from the first air inlet 30, that is, the bottom sides 601b of the long condensing fins 601 and the bottom sides 602b of the short condensing fins 602 are inclined downward along the direction of the air flow, which can form the bottom sides 601b of the long condensing fins 601 and the bottom sides 602b of the short condensing fins 602 as bottom sides gradually inclined downward, or connect the long condensing fins 601 and the short condensing fins 602 with horizontal bottom sides with the cold end surface 201 at an inclined angle to form a state with gradually inclined downward bottom, and can also connect the long condensing fins 601 and the short condensing fins 602 with horizontal bottom sides with the thermoelectric element 20 and then place them in the casing 10 at an inclined angle with the horizontal line of the thermoelectric dehumidifying apparatus 100, and the bottom sides 601b of the long condensation fins 601 and the bottom sides 602b of the short condensation fins 602 are formed in a gradually downwardly inclined state.
Referring to fig. 5 to 11, the air flow a containing moisture enters the housing 10 through the first air inlet 30 and is guided by the second air guiding plate 109 to flow to the lower air duct 106. When the air flow a enters the condensing fin group 60 disposed in the lower air duct 106, since the air flow a with higher temperature contacts the long and short condensing fins 601, 602 with low temperature, the air flow a and the condensing fins 601, 602 generate energy exchange, so that the temperature of the air flow a is gradually lowered, when the temperature is lowered to a specific temperature, the moisture contained in the air flow a is saturated, the air temperature is slightly lower, the moisture condenses, at this time, the temperature is called the dew point temperature, the moisture in the air flow a condenses into small water drops on each condensing fin 601, 602, the water drops are driven by the air flow a, the bottom sides 601b, 602b inclined downward along each condensing fin 601, 602 slide and coalesce downward toward the fourth side 104, and finally slide off each condensing fin 601, 602 and leave the condensing fin group 60 to remove moisture in the air flow a. The low-temperature air flow B from which moisture is removed flows to the upper air duct 105 along the connecting air duct 107 connected to the lower air duct 106, and is sucked by the fan 80 to flow toward the fin group 70 located in the upper air duct 105. Since the fan 80 is disposed between the second air inlet 40 and the heat dissipating fin assembly 70, the fan 80 sucks the low-temperature air flow B and also sucks an external air flow C entering from the second air inlet 40, so that the low-temperature air flow B and the external air flow C are mixed into a mixed air flow D and blown toward the heat dissipating fin assembly 70. When the mixed airflow D passes through the heat dissipating fin set 70, the mixed airflow D contacts and sweeps over the surface of each heat dissipating fin 701 to take away the heat energy on each heat dissipating fin 701, and thereby the temperature of the mixed airflow D is increased to be a hot airflow E which escapes from the air outlet 50 provided on the third side 103.
Referring to fig. 9 and 10, in the present embodiment, the bottom sides 601b of the long condensing fins 601 and the bottom sides 602b of the short condensing fins 602 are gradually inclined downward from the vicinity of the first air inlet 30 toward the direction away from the first air inlet 30, and when the air flow a contacts each condensing fin 601, 602 and condenses water drops on each condensing fin 601, 602, the weight of the water drops carries the water drops to slide downward along each condensing fin 601, 602, and at the same time, the water drops are pushed by the flow of the air flow a to slide along the inclined bottom side of each condensing fin 601, 602, so as to accelerate the water drops to slide downward toward the direction away from the first air inlet 30 toward the fourth side 104 and toward the direction away from the first air inlet 30. When the water drops on the short condensing fins 602 slide to the bottom side 602b thereof, the water drops contact and coalesce with the water drops on the long condensing fins 601, and the water drops are combined into water drops with larger volume due to the surface tension of the water drops, and accelerate on the long condensing fins 601 to the direction of the fourth side surface 104 and slide downwards to slide from the bottom side of the long condensing fins 601, so that the water drops can quickly leave each condensing fin 601, 602, and further the speed of the water drops condensed by each condensing fin 601, 602 is increased, once the water drops leave the condensing fins 60, the refrigeration capacity of the thermoelectric element 20 is not consumed, and the condensing fins 60 can continuously exert the cooling effect, so as to increase the dehumidification effect on the air flow a. The design that long and short condensing fins are arranged alternately is adopted to increase the chance that the condensed water on the short condensing fins is collected on the long condensing fins, for example, when 6 short condensing fins are separated by 5 long condensing fins, the water drops generated by condensation of 11 condensing fins are easy to be collected on 5 (about half of the total number of condensing fins) long condensing fins at the bottom end, the speed of the water drop for increasing the volume is accelerated, and the sliding and falling of the water drops are accelerated.
It should be noted that, during the process of sliding but not reaching the bottom sides 601b, 602b, if the water drops touch the water drops on the adjacent condensing fins, they are combined into larger water drops, so as to accelerate the subsequent sliding speed, so that the water drops can rapidly leave each condensing fin 601, 602.
In order to show the above-mentioned influence of the fin gap d2 and the height difference d3 between each of the condensing fins 601, 602 on the dehumidification effect, the following table shows the dehumidification capacity measured after the operation of the thermoelectric conversion dehumidification device under the conditions of the same indoor space, the same indoor humidity and the same room temperature by using different condensing fin gaps d2 and adjacent long and short condensing fins with different height differences d3, expressed as the weight of water drops produced per hour. Wherein the peripheral volume (height about 38mm, width about 40mm, length 40mm) and the condensing fin thickness (1.0 to 1.3mm) of the condensing fin group 60 are maintained constant, so that the total condensing fin number is reduced as the fin gap d2 is increased; and the height difference d3 is the amount of shortening of the short condensing fins 602 relative to the long condensing fins 601, tested at 0 to 5 mm. The average height of each set of long and short fins is kept consistent (for example, when d3 is 2mm, the long condensing fins are 39mm, the short condensing fins are 37mm, and the average height is 38mm, and the total surface area of the condensing fins with the height equal to 38mm is kept equivalent for comparison).
In each of the above experiments of different total condensing fin numbers caused by different fin gaps, the dehumidification water amounts of adjacent condensing fins having height differences are all better than the dehumidification water amounts of equal-height designs of condensing fins having height differences of 0, wherein the dehumidification water amount of the adjacent condensing fins having height differences d3 between 2mm and 4mm is the most, and the optimum condensation efficiency of the adjacent long and short condensing fins having height differences d3 between 2mm and 4mm is shown.
In addition, referring to fig. 8 again, in the present embodiment, the fan 80 is disposed between the second air inlet 40 and the heat dissipating fin set 70, that is, before the mixed air flow D contacts the heat dissipating fin set 70, so that the mixed air flow D is pushed by the fan 80 in a pushing manner to pass between each heat dissipating fin 701, and when the mixed air flow D passes through, it contacts each heat dissipating fin 701 to perform a heat exchange function, and the difference between the air flow flowing in a sucking manner and the air flow flowing in a pushing manner is that the air flow generated in the sucking manner is a stable air flow, and the air flow pushed in the pushing manner is a swirling air flow due to the rotation of the fan blades, so that, in the present embodiment, when the mixed air flow D enters between each heat dissipating fin 701, if the sucking manner is adopted, the contact area between the stable mixed air flow and each heat dissipating fin 701 is limited, so that the heat energy taken away from each heat dissipating fin 701 is also limited, and the heat dissipating effect of each heat dissipating fin 701 is not ideal; in this embodiment, due to the pushing manner, the contact area between the generated swirling mixed airflow D and each of the heat dissipation fins 701 is large, and the effect of taking away heat energy is ideal, so that the heat dissipation effect between each of the heat dissipation fins 70 and the hot end surface 202 of the thermoelectric element 20 can be increased, the cold end surface 201 of the thermoelectric element 20 is kept at a certain low-temperature condensed water droplet, and the dehumidification efficiency is further improved.
Referring to fig. 12, another embodiment of the present invention is different from the above embodiments in that a plurality of thermoelectric elements 20 disposed in a casing 10 may be connected in series or in parallel, and in this embodiment, two thermoelectric elements 20 are connected in series, wherein the cold end surfaces 201 of the two thermoelectric elements 20 are connected to a condensing fin set 60, and the hot end surfaces 202 of the two thermoelectric elements 20 are connected to a heat dissipation fin set 70, so as to perform dehumidification by using the two thermoelectric elements 20. Of course, the condensing fin group 60 and the radiating fin group 70 may be divided into a plurality of groups, and the fins may be appropriately disposed in a staggered manner in the airflow direction to exhibit a heat exchange effect with the passing airflow.
Through the structure, the invention has the following beneficial effects:
(1) after the air flow enters the thermoelectric dehumidification device, the gradually downward inclined design of the bottom side of each condensing fin is utilized to drive water drops condensed on each condensing fin to rapidly slide towards the fourth side surface direction and downward along the air flow direction and inclination, and meanwhile, the height difference of the bottom sides of two adjacent condensing fins is utilized to enable the water drops on the adjacent condensing fins to be mutually contacted and combined, so that the water drops are easily converged to the long fins to form water drops with larger volume, and then the water drops rapidly slide off the condensing fins; since the water droplets rapidly slide on the condensing fins, the position of the condensing fin where the water droplet is generated can quickly contact the air stream and re-condense out another water droplet and slide, thereby increasing the efficiency of condensing the water droplets to increase the dehumidification effect on the air stream passing through the condensing fin.
(2) The dehumidified low-temperature air flow and the external air flow are mixed into a mixed air flow, the mixed air flow is pushed by the fan to pass through the radiating fin group and is discharged from the air outlet, and the mixed air flow is pushed by the fan, so that the flow section of the mixed air flow is a rotating air flow which is not fixed in area and can change in shape at any time, and when the mixed air flow passes through the radiating fin group, the mixed air flow can generate a large contact area with each radiating fin, and heat energy on each radiating fin can be effectively taken away. Under the condition that the heat dissipation effect of each heat dissipation fin is better, the temperature of the hot end face of the thermoelectric element connected with the heat dissipation fin group is reduced, so that the energy of the cold end face of the thermoelectric element can be moved to the hot end face again, the low temperature of the cold end face is maintained, and the cold end face can conduct the low temperature to each condensation fin, so that the condensation water drops of each condensation fin can be favorably condensed.
(3) The invention makes use of the design that the horizontal length difference between two adjacent side surfaces of the shell and the air inlet and outlet are positioned on the side surface with shorter horizontal length, so that the thermoelectric dehumidification device is suitable to be placed in an indoor space with small gap, thereby achieving the purpose that the thermoelectric dehumidification device can be thinned.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications to the application of the present invention as described in the specification and claims should be considered as included in the scope of the present invention.
Claims (8)
1. A thermoelectric dehumidification apparatus, comprising:
the shell is provided with at least a first side surface and a second side surface, wherein the first side surface and the second side surface are oppositely arranged at a first interval, the horizontal direction length of the first side surface and the horizontal direction length of the second side surface are greater than the distance of the first interval, the shell is also provided with a third side surface and a fourth side surface which are oppositely arranged, and the third side surface and the fourth side surface are respectively connected with the first side surface and the second side surface;
the thermoelectric element is arranged between the first side surface and the second side surface, an upper air duct and a lower air duct are separated between the first side surface and the second side surface, and one end of the upper air duct is communicated with one end of the lower air duct; the thermoelectric element is provided with a cold end surface and a hot end surface, the cold end surface is positioned in the lower air duct, the hot end surface is positioned in the upper air duct, and the cold end surface has a dew point temperature;
the first air inlet is arranged on the third side surface of the shell and communicated with the other end of the lower air channel;
the second air inlet is arranged on the fourth side face of the shell and communicated with one end of the upper air duct;
the air outlet is arranged on the third side surface of the shell and is communicated with the other end of the upper air channel;
a condensing fin group including a plurality of long condensing fins and a plurality of short condensing fins, each of the long condensing fins and each of the short condensing fins being adjacently disposed in the lower air duct in parallel with the first side surface and being staggered, a fin gap being provided between the adjacent long condensing fins and the short condensing fins, a top side of each of the long condensing fins and a top side of each of the short condensing fins being connected to the cold end surface, each of the long condensing fins and each of the short condensing fins having the same dew-point temperature as the cold end surface, a bottom side of each of the long condensing fins and a bottom side of each of the short condensing fins being free sides, and the bottom side of each of the long condensing fins and the bottom side of each of the short condensing fins being inclined downward toward a direction away from the first air inlet, the bottom sides of the adjacent long condensing fins and the bottom sides of the adjacent short condensing fins have a height difference;
the heat radiating fin group at least comprises a plurality of heat radiating fins, each heat radiating fin is arranged in the upper air channel in parallel with the first side surface and arranged at intervals, and the bottom side of each heat radiating fin is connected with the hot end surface;
a fan fixedly arranged in the upper air channel and positioned between the second air inlet and the radiating fin group to push a mixed air flow entering through the second air inlet and the lower air channel to enter the upper air channel, so that the mixed air flow generates rotation and blows to the radiating fin group, the contact area between the mixed air flow and the radiating fins of the radiating fin group is increased through the rotation of the mixed air flow, the radiating effect of the radiating fins is increased, and a heat energy of the cold end surface of the thermoelectric element is transferred to the hot end surface, so that the cold end surface, each long condensing fin and each short condensing fin are maintained at the dew point temperature;
when an air flow entering from the first air inlet contacts each long condensing fin and each short condensing fin and condenses a water drop on each long condensing fin and each short condensing fin through the dew point temperature of the cold end face, the water drop accelerates the water drop to slide along the inclined bottom side of each long condensing fin and the inclined bottom side of each short condensing fin respectively by the weight of the water drop and the air flow; through the height difference between the bottom sides of the adjacent long condensing fins and the bottom sides of the short condensing fins, when the water drops of the short condensing fins slide to be in contact coalescence with the water drops of the adjacent long condensing fins and are combined into a water drop with larger volume, the water drop on the short condensing fins leaves the short condensing fins, the water drop with larger volume on the adjacent long condensing fins accelerates to slide away from the long condensing fins along the inclined bottom sides, and the efficiency of water drop recondensation of each short condensing fin and each long condensing fin is increased through the accelerated sliding and the separation of each water drop on each short condensing fin and each long condensing fin.
2. The thermoelectric dehumidification device according to claim 1, wherein the fin gap is 1.5 to 3.5 mm.
3. The thermoelectric dehumidification device according to claim 1, wherein a difference in height between a bottom side of each of the long condensation fins and a bottom side of each of the short condensation fins is 2 to 4 mm.
4. The thermoelectric dehumidifying device according to claim 1, wherein the housing further comprises a connecting duct which is hollow and open at both ends, and both ends of the connecting duct are respectively communicated with the one end of the upper duct and the one end of the lower duct, so that the upper duct and the lower duct are communicated with each other through the connecting duct.
5. The thermoelectric dehumidification device according to claim 4, wherein the housing further comprises a plurality of first baffles disposed along a peripheral wall of the connecting duct.
6. The thermoelectric dehumidification device according to claim 1, wherein the housing further comprises a second baffle disposed between and communicating the first air inlet and the lower air duct.
7. The thermoelectric dehumidification device according to claim 1, wherein the housing further comprises a third baffle disposed between and communicating the air outlet and the upper duct.
8. The thermoelectric dehumidifying device of claim 1, wherein a sectional area of an air supply of the fan corresponds to a sectional area of a plurality of the heat dissipating fins arranged in parallel.
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| CN201811518802.6A CN111306654B (en) | 2018-12-12 | 2018-12-12 | Thermoelectric dehumidifying device |
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| CN201811518802.6A CN111306654B (en) | 2018-12-12 | 2018-12-12 | Thermoelectric dehumidifying device |
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| CN111306654A (en) | 2020-06-19 |
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