JP2011031165A - Dehumidifier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dehumidifier that can prevent its dehumidifying rotor from reducing its dehumidifying capacity by controlling the heating action of its heater, and allows the reduction of the number of its parts to reduce its production cost. <P>SOLUTION: The dehumidifier including a dehumidifying means 51 that dehumidifies air introduced from outside, and a heating means 64 that heats and evaporates moisture adsorbed by the dehumidifying means to regenerate the same, is characterized by including: a detecting means 121 for detecting the temperature in the vicinity of the heating means; a room temperature detecting means 122 for detecting the room temperature; and a controller 123 that controls the heating action of the heating means based on the temperature in the vicinity of the heating means detected by the detecting means for detecting the temperature in the vicinity of the heating means, and on the room temperature detected by the room temperature detecting means. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a dehumidification rotor that adsorbs moisture in the air and dehumidifies it, and a dehumidifier equipped with a heater that heats and regenerates the dehumidification rotor.

  Conventionally, when the dehumidifier is used in a state where the room temperature is high, there has been a problem that the dehumidification rotor is deteriorated by heat and the moisture absorption performance is lowered.

  Therefore, in Patent Document 1, when the room temperature is high (35 ° C. or higher), a damper provided rotatably at the inlet of the purge air passage is closed and operation is performed with maximum ventilation of the radiator. A dehumidifier is described in which the temperature falls to enter the operating temperature range of the compressor and the resin heat resistance temperature is entered, so that it can be operated continuously. Also, when the room temperature is low (15 ° C. or lower), the dehumidifier fully opens the damper, maximizes the purge air amount, preheats the adsorbent, and moves to the moisture release unit. It is possible to improve the moisture absorption performance by increasing the amount of moisture adsorbed from the target air and increasing the amount of moisture desorbed from the dehumidified target air in the moisture release portion.

  However, the dehumidifier described in Patent Document 1 has a problem in that the number of parts increases and the manufacturing cost increases because the damper is used to adjust the air flow rate or purge air amount of the radiator.

JP 2006-187721 A

  Moreover, the heater used to heat and regenerate the dehumidification rotor that has adsorbed moisture often uses a heater in which a heating wire is wound around mica from the viewpoint of cost and durability. In this heater, when the energization voltage to the heater fluctuates due to the use of other peripheral electric devices, the heater output fluctuates greatly accordingly. Since the heater output is closely related to the rotor heating temperature, when the heater output increases, the rotor heating temperature also increases.

  Specifically, as shown in FIG. 14, when the energization voltage to the heater shown in graph a increases from 100V to 107V, the heater output shown in graph b also increases from 400W to 460W. As a result, the amount of heat generated by the heater increases and the rotor heating temperature also rises, so the dehumidifying rotor surface temperature shown in graph c rises from 500 ° C. to 575 ° C. When the dehumidifying rotor surface temperature exceeds the heat resistance temperature of the rotor, the dehumidifying rotor is deteriorated by heat and the dehumidifying ability is lowered. In order to prevent this, it is necessary to set the heater heating temperature of the heater low in advance in consideration of changes in the heater output due to fluctuations in the energization voltage.

  When using a dehumidification rotor with low heat resistance that is regenerated by low-temperature heating to reduce the power consumption of the dehumidifier, the temperature is lower than the heat resistance temperature, taking into account changes in the amount of heat generated by the heater due to fluctuations in the energization voltage, as described above. Therefore, there is a problem that the dehumidification capacity of the dehumidification rotor is lowered as a result of lowering the ability to heat and remove the moisture adsorbed from the dehumidification rotor.

  The present invention has been made in view of the above-described conventional problems, and by controlling the heating operation of the heater, it is possible to prevent the dehumidification capacity of the dehumidification rotor from being lowered and reduce the number of parts and the manufacturing cost. It is an object of the present invention to provide a dehumidifier that can be used.

The present invention relates to a dehumidifier having a dehumidifying means for dehumidifying air taken in from the outside, and a heating means for regenerating the dehumidifying means by evaporating the moisture adsorbed on the dehumidifying means by heating.
Heating means ambient temperature detection means for detecting the temperature around the heating means;
Room temperature detection means for detecting room temperature;
Control means for controlling the heating operation of the heating means based on the ambient temperature of the heating means detected by the heating means ambient temperature detection means and the room temperature detected by the room temperature detection means;
It is equipped with.

  Accordingly, it is possible to accurately measure the ambient temperature of the heating unit that depends on the room temperature in consideration of the room temperature, and to accurately control the heating operation of the heating unit based on the ambient temperature.

  As one specific means, the control means estimates the power consumption of the heating means from the ambient temperature and room temperature of the heating means, further estimates the energization voltage to the heating means from the power consumption, and this energization voltage. It is preferable to control the heating operation of the heating means based on the above.

  Since the output of the heating means increases and decreases as the energization voltage to the heating means increases and decreases, the heating operation of the heating means can be accurately controlled by controlling the output of the heating means based on the estimated energization voltage.

The heating operation of the heating unit is preferably controlled by switching the output of the heating unit.
Since the heating operation of the heating means is controlled by switching the output of the heating means, the number of parts can be reduced and the manufacturing cost of the dehumidifier can be reduced as compared with the case of controlling by providing other parts such as a damper.

When the energization voltage to the heating unit is smaller than the first threshold, the control unit preferably increases the output of the heating unit.
As a result, the amount of heat generated by the heating means increases and the heating temperature of the dehumidifying means also rises, so that the moisture adsorbed by the dehumidifying means cannot be removed and the dehumidifying ability can be prevented from being lowered.

  When the energization voltage to the heating unit is larger than the second threshold, the control unit preferably reduces the output of the heating unit.

  Thereby, by reducing the calorific value of the heating means, the dehumidifying means heating temperature is also lowered, and it is possible to prevent the dehumidifying means from being deteriorated by heat.

The output of the heating means is preferably controlled by turning on or off the energization of the heating means.
Thus, when the energization voltage to the heating unit is high and the heat generation amount of the heating unit is large, the energization to the heating unit is turned off and the driving time is switched. Therefore, by reducing the heating value of the heating means, the dehumidifying means heating temperature is also lowered, and it is possible to prevent the dehumidifying means from being deteriorated by heat.

Alternatively, the heating operation of the heating unit is preferably controlled by switching the resistance of the heating unit.
Thereby, the heating value of the heating means can be controlled by increasing / decreasing the resistance value of the heating means and increasing / decreasing the amount of heat generated by the heating means inversely proportional to the resistance value.

For example, when the energization voltage to the heating unit is smaller than a first threshold value, the control unit is preferably switched so that the resistance value of the heating unit decreases.
As the resistance value decreases, the amount of heat generated by the heating means inversely proportional to the resistance value increases. Therefore, the amount of heat generated by the heating means is reduced, and the heating temperature of the dehumidifying means is also reduced, so that the moisture adsorbed by the dehumidifying means cannot be removed and the dehumidifying ability can be prevented from being lowered.

On the other hand, when the energization voltage to the heating unit is larger than the second threshold value, the control unit is preferably switched so that the resistance value of the heating unit increases.
As the resistance value increases, the amount of heat generated by the heating means inversely proportional to the resistance value decreases. Therefore, the heating temperature of the dehumidifying means is also lowered, and the dehumidifying means can be prevented from being deteriorated by heat.

  According to the present invention, the output of the heating means can be controlled in accordance with the energization voltage to the heating means. Therefore, when the energization voltage to the heating unit is large and the output of the heating unit is large, the output of the heating unit can be controlled to be within a certain temperature range by preventing the dehumidifying unit from being deteriorated by heat. can do. On the other hand, when the energizing voltage to the heating means is small and the output of the heating means is small, the moisture adsorbed by the dehumidifying means cannot be removed by improving the output of the heating means and the dehumidifying means heating temperature is lowered. It is possible to prevent the dehumidifying ability from being lowered.

  Furthermore, since the heating temperature of the dehumidifying means is controlled by switching the heating operation of the heating means, the number of parts can be reduced and the manufacturing cost of the dehumidifier can be reduced as compared with the case where other parts such as a damper are provided and controlled. it can.

It is a partial fracture perspective view of a dehumidifier concerning the present invention. FIG. 2 is a partially broken perspective view of the dehumidifier viewed from the opposite direction to FIG. 1. It is a perspective view of the partition member of the dehumidifier of FIG. It is a perspective view of the partition member seen from the direction opposite to FIG. It is a front view which shows the state which attached the dehumidification rotor to the dehumidifier of FIG. It is a figure which shows roughly the reproduction | regeneration channel | path of the dehumidifier of FIG. It is the sectional view on the AA line of the radiator of the dehumidifier of FIG. It is a schematic side view which shows the internal structure of the dehumidifier of FIG. It is a flowchart which controls a heater output among the heating operation control of the heater which concerns on this invention. It is a figure which shows the heater ambient temperature, room temperature, and the relationship of heater output control based on these. It is a figure which shows the change of the dehumidification rotor surface temperature at the time of controlling a heater output. It is a flowchart which shows the modification of the heating operation control of the heater of FIG. (A) is a circuit diagram of the heater which connected the heater of a respectively different resistance value in parallel, (b) is a figure which shows the modification of the circuit diagram of (a). It is a figure which shows the change of dehumidification rotor surface temperature by a heater output also changing with the change of the energization voltage to the conventional heater.

  Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 shows a dehumidifier 11 according to an embodiment of the present invention. The dehumidifier 11 includes a dehumidifying passage and a regeneration passage inside the main body 12.

  The main body 12 is obtained by dividing the internal space of a substantially rectangular parallelepiped casing 21 into two front and rear portions by a partition member 41.

  The casing 21 includes a front cover 22 disposed on the upstream side of the dehumidifying passage, a rear cover 23 disposed on the downstream side of the dehumidifying passage, and a top cover 24 disposed on the upper portion thereof.

  On the front surface of the front cover 22, an air inlet 28 made up of a plurality of slits for taking air into the dehumidifier 11 is formed.

  As shown in FIG. 2, a lattice-shaped exhaust port 33 for discharging the air inside the dehumidifier 11 to the outside is formed on the upper surface of the rear cover 23.

  The top cover 24 has a substantially rectangular parallelepiped shape, and a recess 36 reaching the exhaust port 33 of the rear cover 23 is formed on the top surface. An opening / closing plate 38 is rotatably attached to a support shaft 37 on the front cover 22 side of the recess 36. The direction in which the air inside the dehumidifier 11 is exhausted to the outside can be adjusted by rotating the opening / closing plate 38 and disposing it at a predetermined position.

  As shown in FIGS. 3 and 4, the partition member 41 is formed with a circular opening 44 and a rectangular tube portion 45 that is adjacent to the circular opening 44 and is provided so that air can blow through. . A separation wall 46 is provided below the circular opening 44 and the rectangular tube portion 45, and a heat exchanging portion 91, which will be described later, is disposed above the separation wall 46. Is provided with a water storage tank 15 for collecting condensed water.

  A main fan 47 is accommodated on the rear side of the partition member 41. An involute passage 49 for guiding the blown air to the exhaust port 33 is formed around the blowout port 48 of the main fan 47.

  The dehumidification passage is a passage from the intake port 28 to the exhaust port 33, and a dehumidification rotor 51 that adsorbs moisture in the air and a main fan 47 are disposed in the middle.

  For the rotor body 52 of the dehumidifying rotor 51, a ceramic honeycomb adsorbent combined with zeolite, silica gel or the like is used. For example, a dehumidifying rotor having a low heat-resistant temperature (for example, 300 ° C. to 400 ° C.) is used as the adsorbent. The dehumidifying rotor having a low heat-resistant temperature is regenerated at a low temperature such as 200 ° C. to 300 ° C. Therefore, it is possible to reduce the amount of heat generated by the heater 64, which is a heating means for heating and regenerating the rotor body 52, to reduce the power consumption of the dehumidifier 11, and to appropriately control the temperature of the heater 64.

  Further, the dehumidifying rotor 51 is disposed in the circular opening 44 of the partition member 41, and is supported by two rotation support members 58 provided at two locations as shown in FIG. 5, via a drive gear 59a provided at one location. The dehumidification rotor 51 rotates around the center.

  The rotation support member 58 is disposed below the center of the circular opening 44 of the partition member 41 and along the periphery of the circular opening 44 of the partition member 41 so as to support the dehumidification rotor 51. Here, a gear that meshes with the rotor holder 53 and rotates is employed as the rotation support member 58. However, the rotation support member 58 may be a roller as long as it can support the dehumidification rotor 51.

  The drive gear 59 a is fixed to the rotating shaft of the dehumidifying rotor drive motor 59. The dehumidifying rotor drive motor 59 is disposed above the center of the circular opening 44 of the partition member 41 and is disposed along the periphery of the circular opening 44 of the partition member 41 between the dehumidification rotor 51 and a radiator 81 described later. It is installed.

  The main fan 47 is a known sirocco fan.

  The regeneration passage is a passage for removing water adsorbed from the dehumidification rotor 51 and regenerating it, and constitutes a closed loop shown in FIG. In the middle of the regeneration path, a heater unit 61, a radiator 81, and a heat exchanging portion 91 that communicates the heater unit 61 and the radiator 81 are provided. Hereinafter, the air flowing in the regeneration passage is referred to as regeneration air.

  As shown in FIG. 4, the heater unit 61 includes a unit main body 62, a sub fan 63 provided at one end of the unit main body 62, and a heater 64 provided at the other end of the unit main body 62. Yes.

  The unit main body 62 includes a fan case 66 in which the sub fan 63 is disposed, and a hollow rectangular parallelepiped heater case 67 provided along the radial direction of the dehumidifying rotor 51.

  The sub fan 63 is a known sirocco fan, and sucks the regenerated air in the heat exchanging portion 91 and blows it out into the heater unit 61 to circulate the air in the closed loop.

  The heater case 67 faces the surface of the dehumidification rotor 51 from the periphery to the center of the dehumidification rotor 51 and is disposed at a predetermined interval in the radial direction. Of the surface of the dehumidifying rotor 51, a portion corresponding to the 1/8 region faces the heater case 67, and the remaining 7/8 region is open so as to allow ventilation and is located in the dehumidifying passage.

  The heater 64 heats the air passing through the upstream opening 72 and supplies it to the dehumidification rotor 51, and directly heats the dehumidification rotor 51. Thereby, the water | moisture content adsorbed by the dehumidification rotor 51 can be evaporated, and the adsorption | suction capability of the dehumidification rotor 51 can be recovered.

  Here, as described above, a low temperature regeneration type dehumidification rotor that regenerates at a low temperature such as 200 ° C. to 300 ° C. is used as the dehumidification rotor 51. Thereby, the manufacturing cost of the dehumidifier 11 can be reduced.

  The heater 64 generates heat by power supplied from a power source (not shown). Here, a well-known heater is used in which the amount of heat generated changes due to fluctuations in the energization voltage to the heater.

  As shown in FIG. 7, the radiator 81 includes a first radiator section 82 into which heat from the heater 64 flows, a second radiator section 83 into which regenerated air once cooled by the first radiator section 82 flows, The upper part of these two radiator parts 82 and 83 is comprised with the cover body 84 which is a communication part which seals and communicates. The radiator 81 is attached to the rectangular cylindrical portion 45 of the main body 12.

  Each of the radiator portions 82 and 83 includes a plurality of pipes 85 made of a synthetic resin material such as polyethylene or polypropylene. The lower end of the first radiator section 82 communicates with a high temperature air flow passage 105 of a heat exchange section 91 described later, and the lower end of the second radiator section 83 communicates with a low temperature air flow passage 106 of a heat exchange section 91 described later. Yes. The lid 84 is a hollow rectangular parallelepiped with one surface open, and is screwed to the upper plate 86. Accordingly, the regenerative air in the radiator 81 passes from the high-temperature air flow passage 105 through the first radiator 82 that conveys the regenerative air upward, is folded back by the lid 84, and the second radiator that conveys the regenerative air downward. It flows into the part 83 and is conveyed to the low temperature air flow passage 106.

  As shown in FIG. 3, the heat exchanging portion 91 has a hollow tank shape, and is attached below the dehumidifying rotor 51 and the radiator 81 of the main body 12 and above the separation wall 46. Inside the heat exchanging portion 91, a partition wall 104 having the same shape as the side wall 103, a high temperature air flow passage 105 that conveys high temperature air that has passed through the dehumidification rotor 51 from the heater 64 to the radiator 81, and a low temperature that is cooled by the radiator 81. The air is divided into a low-temperature air flow passage 106 that conveys the air to the heating unit 64. The partition wall 104 is made of a metal having high thermal conductivity, and is made of, for example, aluminum.

  One end of the high-temperature air flow passage 105 is opposed to the heater case 67 via the dehumidification rotor 51 and communicates with the rotor cover 111 extending so as to retreat from the surface area of the dehumidification rotor 51, and the other end is The first radiator portion 82 communicates with the first horizontal plane 94. Therefore, the high-temperature regeneration air is conveyed in the direction of the arrow in FIG.

  One end of the low-temperature air flow passage 106 communicates with the second radiator portion 83, and the other end communicates with the heater unit 61.

  Condensed water generated in the radiator 81 drops on the bottom surface of the heat exchanging portion 91 and is drained by its own weight toward the drain port 99 (see FIG. 6) due to the inclination of the bottom surface.

  Next, the dehumidifying operation of the dehumidifier 11 according to the present embodiment will be specifically described.

  When the main fan 47 is driven, the ambient air sucked from the intake port 28 flows toward the dehumidification rotor 51 side and the radiator 81 side which are dehumidification passages.

  In the dehumidifying passage, when the air sucked from the intake port 28 passes through the dehumidifying rotor 51, the contained moisture is adsorbed. Thus, the dried air flows through the involute passage 49 and is discharged into the room from the exhaust port 33 of the rear cover 23.

  In the radiator 81, the air sucked from the intake port 28 passes through the second radiator portion 83 and the first radiator portion 82 in the same manner as described above, exchanges heat with the regenerated air flowing in these radiators 81, and regenerates. Cool the air. The air sucked into the main fan 47 and passing through the radiator 81 is hereinafter referred to as cooling air.

  In the regeneration passage, the sub-fan 63 is driven to flow into the heater case 67. The regenerated air is heated by the heater 64 in the heater case 67 and then passes through the dehumidifying rotor 51.

  When the high-temperature regeneration air passes through the dehumidification rotor 51, the moisture adsorbed on the dehumidification rotor 51 is heated and evaporated. The regenerated air that has passed through the dehumidifying rotor 51 moves vertically down the rotor cover 111 and flows into the first radiator 82 through the high-temperature air flow passage 105.

  The regeneration air that has flowed into the first radiator section 82 is conveyed upward in the pipe 85. When the regeneration air passes through the first radiator section 82, the regeneration air is cooled by heat exchange due to a temperature difference between the regeneration air and the cooling air passing through the radiator 81, and moisture contained in the regeneration air is condensed. The condensed water is drained from the radiator 81 to the drainage passage of the heat exchanging portion 91 and is collected from the drainage port 99 to the water storage tank 15.

  The regeneration air that has flowed out of the first radiator section 82 is folded back by the lid 84 and flows into the second radiator section 83 to exchange heat with the cooling air on the upstream side. Specifically, the regeneration air in the second radiator 83, that is, the regeneration air that has been cooled, exchanges heat with the upstream cooling air, so that the temperature of the regeneration air in the radiator 81 is further reduced to reduce the temperature of the radiator 81. The cooling performance can be improved.

  The regeneration air that has flowed out of the second radiator 83 and flowed into the low-temperature air flow passage 106 is supplied again toward the heater case 67 by the sub fan 63.

  As shown in FIG. 8, a heater thermistor 121, which is a heating means ambient temperature detection means, is disposed on the rear side of the heater 64, and a room temperature thermistor 122, which is a room temperature detection means, is disposed on the front side of the radiator 81. Here, the upstream side of the dehumidifying passage is called the front side, and the opposite direction is called the rear side. However, the arrangement location of the room temperature thermistor 122 is not particularly limited as long as the room temperature can be measured. The heater thermistor 121 and the room temperature thermistor 122 are connected to a control device 123 as control means, and the heater ambient temperature Th detected by the heater thermistor 121 and the room temperature Ts detected by the room temperature thermistor 122 are input to the control device 123. ing. This control device 123 is connected to the heater 64, and controls the output of the heater 64 by switching the output of the heater 64 to three stages of “weak”, “medium”, and “strong”.

  In the dehumidifier during the dehumidifying operation, the control device 123 estimates the heater output based on the heater ambient temperature Th. That is, as the heater output increases, the heater heat generation amount also increases, and the heater ambient temperature Th increases. Based on this, the heater output can be estimated. Moreover, the energization voltage to the heater 64 can be estimated by estimating the heater output. However, since the heater ambient temperature Th is affected by the room temperature Ts, the heater output is estimated from the heater ambient temperature Th in consideration of the room temperature Ts, and the energization voltage to the heater 64 is estimated.

  Specifically, the control device 123 calculates the deviation between the heater ambient temperature Th and the room temperature Ts, that is, Th-Ts, estimates the energization voltage to the heater 64, and then executes the heating operation control of the heater 64. Here, of the heating operation control of the heater 64, the output control of the heater 64 will be described. At the stage where the output control of the heater 64 is started, the dehumidifier 11 is operated with the heater output being “medium”.

  As shown in the flowchart of FIG. 9, first, in step S <b> 1, the control device 123 calculates Th−Ts, and based on this, estimates the power consumption of the heater 64 using a table described later. Then, it progresses to step S2, and the electricity supply voltage to the heater 64 is estimated from the said power consumption using the table mentioned later. If the control device 123 determines in step S3-1 that the energization voltage is 95 V or less, which is the first threshold value, the process proceeds to step 4-1, and the heater output is switched to “strong” for a certain time. And it progresses to step S5, and the control apparatus 123 calculates Th-Ts again, estimates power consumption, progresses to step S6, and estimates an energization voltage. If it is determined in step S7-1 that the energization voltage is 95 V or less, the process returns to step S4-1 to switch the heater output to “strong” again. If it is determined in step S7-1 that the energization voltage is greater than 95V, the process returns to step S1. Thus, when the energization voltage to the heater 64 is lower than 95 V and the heater heat generation amount is small, the heater output is switched to “strong”. Therefore, since the heater heat generation amount increases and the dehumidification rotor heating temperature also rises, the moisture adsorbed by the dehumidification rotor 51 is sufficiently removed, so that it is possible to prevent the dehumidification capability from being lowered.

  If the controller 123 determines in step S8-1 that the energization voltage is between 95V and 105V, the process proceeds to step S9-1, and the process returns to step S1 without switching the heater output.

  If the controller 123 determines in step S10-1 that the energization voltage is 105 V or more, which is the second threshold value, the process proceeds to step S11-1, and the heater output is switched to “weak” for a certain period of time. And it progresses to step S12, and the control apparatus 123 calculates Th-Ts again, estimates power consumption, and estimates the electricity supply voltage to a heater by step S13. If it is determined in step S14-1 that the energization voltage is 105 V or higher, the process returns to step S11-1, and the heater output is switched to “weak” again. If it is determined in step S14-1 that the energization voltage is lower than 105V, the process returns to step S1.

  Accordingly, when the energization voltage to the heater 64 is higher than 105V and the heater heat generation amount is large, the heater output is switched to “weak”. As a result, the amount of heat generated by the heater is reduced, so that the heating temperature of the dehumidifying rotor is also reduced, and the dehumidifying rotor 51 can be prevented from being deteriorated by heat. In addition, since the dehumidifying rotor heating temperature is controlled by switching the heater output, the number of parts can be reduced and the manufacturing cost of the dehumidifier can be reduced as compared with the case of controlling by providing other parts such as a damper.

  Further, since the heating operation of the heater 64 is controlled based on the heater ambient temperature Th and the room temperature Ts, an error in the heater ambient temperature Th can be corrected by the room temperature Ts, and the heating operation of the heater 64 can be accurately controlled. Furthermore, since the output of the heater 64 increases and decreases as the energization voltage to the heater 64 increases and decreases, the heating operation of the heater 64 can be accurately controlled by estimating the energization voltage and controlling the output of the heater 64.

  The estimation of power consumption based on the deviation between the heater ambient temperature Th and the room temperature Ts in the flowchart, the estimation of the energization voltage, and the switching of the heater output will be described using specific numerical values with reference to the table of FIG.

  Hereinafter, a case where the energization voltage to the heater 64 in step S3-1 is determined to be 95 V or less will be described. In step S1, if the heater ambient temperature Th is 45 ° C. and the room temperature Ts is 8 ° C., the value of Th−Ts is 37 ° C., and the control device 123 estimates that the power consumption at this time is 336W. Based on this, in step S2, it is estimated that the energization voltage is 92V. Then, in step S3-1, it is determined that the energization voltage is 95 V or less, the heater output is switched to “strong” in step S4-1, and the heater output rises to 111% shown in Q95. Thus, for example, if the heater ambient temperature Th rises to 61 ° C. and the room temperature is 8 ° C., the value of Th−Ts calculated in step S5 is 53 ° C., and the power consumption is estimated to be 380W. Then, since the energizing voltage to the heater 64 is estimated to be 98V in step S6, it is determined in step S7-1 that the energizing voltage is greater than 95V, and the process returns to step S1. On the other hand, if the heater output temperature is raised to 111% in step S4-1 and the heater ambient temperature Th rises to 53 ° C. and the room temperature is 8 ° C., the value of Th-Ts calculated in step S5 is 45. The power consumption is estimated to be 358 W when the temperature reaches ℃. Then, since the energization voltage is estimated to be 95 V in step S6, it is determined in step S7-1 that the energization voltage is 95 V or less, the process returns to step S4-1, and the heater output is switched to “strong” again. The heater output increases to 104% shown in Q98.

  Hereinafter, a case where the energization voltage to the heater 64 in step S8-1 is determined to be between 95V and 105V will be described. In step S1, if the heater ambient temperature Th is 61 ° C. and the room temperature is 8 ° C., the value of Th−Ts is 53 ° C., and the control device 123 estimates that the power consumption at this time is 380 W. Based on this, in step S2, it is estimated that the energization voltage is 98V. Then, in step S8-1, it is determined that the energization voltage is 95V to 105V, and in step S9-1, the heater output is not switched and is kept constant as indicated by Q100.

  Hereinafter, the case where it is determined that the energization voltage to the heater 64 in step S10-1 is 105 V or higher will be described. In step S1, if the heater ambient temperature Th is 84 ° C. and the room temperature is 1 ° C., the value of Th−Ts is 83 ° C., and the control device 123 estimates that the power consumption at this time is 464 W. Based on this, in step S2, it is estimated that the energization voltage is 108V. Then, in step S10-1, it is determined that the energization voltage is 105 V or higher, the heater output is switched to “weak” in step S11-1, and the heater output is lowered to 89% shown in Q106. Thus, if the heater ambient temperature Th falls to 76 ° C. and the room temperature Ts is 1 ° C., the value of Th−Ts calculated in step S12 is 75 ° C., and the power consumption is estimated to be 442W. Then, since the energization voltage is estimated to be 105V in step S13, it is determined in step S14-1 that the energization voltage is 105V or more, the process returns to step S11-1, and the heater output is switched to “weak” again. , 94% shown in Q103. On the other hand, when the heater output is lowered to 89% in step S11-1, the heater ambient temperature Th decreases to 68 ° C., and if the room temperature is 1 ° C., the value of Th-Ts calculated in step S12 is 67 ° C. The power consumption is estimated to be 420 W. Then, since the energization voltage is estimated to be 102V in step S13, it is determined in step S14-1 that the energization voltage is lower than 105V, and the process returns to step S1.

  Next, the output control of the heater 64 executed with the passage of time will be described with reference to FIG. First, when the heater ambient temperature Th shown in the graph A is 80 ° C. and the room temperature Ts shown in the graph B is 20 ° C., the Th-Ts is 60 ° C., and the controller 123 applies the energization voltage as shown in the graph C. Is estimated to be 100V. At this time, the control device 123 maintains the heater output at 400 W as shown in the graph D. Thereby, the surface temperature of the dehumidification rotor 51 shown to the graph E can be maintained at 500 degreeC. Then, as indicated by point P1, when the heater ambient temperature Th rises to about 85 ° C. and the room temperature Ts is 20 ° C., Th-Ts is 65 ° C., and the controller 123 increases the energization voltage to about 101V. It is estimated that At this time, the control device 123 lowers the heater output increased with the increase of the energization voltage from 460 W to 94% and lowers it to 432 W. Thereby, the raise of the surface temperature of the dehumidification rotor 51 can be suppressed to 540 degreeC from 575 degreeC shown in the graph c of FIG.

  When the operating time of the dehumidifier 11 elapses and reaches the point P2, when the heater ambient temperature Th is about 84 ° C. and the room temperature Ts is 20 ° C., Th-Ts is 64 ° C. Estimated to be about 101V. At this time, the control device 123 keeps the heater output constant at 384 W. Thereby, since the heater output is kept low, the surface temperature of the dehumidifying rotor 51 can be gradually decreased from 540 ° C.

  Subsequently, as indicated by point P3, when the heater ambient temperature Th is about 76 ° C. and the room temperature Ts becomes 20 ° C., Th-Ts is 56 ° C., and the controller 123 estimates that the energization voltage is about 98V. . At this time, the control device 123 increases the heater output from 384 W to 104% and raises the heater output to 400 W.

  As indicated by point P4, when the heater ambient temperature Th is about 78 ° C. and the room temperature Ts is 20 ° C., Th-Ts is 58 ° C., and the controller 123 estimates that the energization voltage is about 99V. . At this time, the control device 123 keeps the heater output at 384 W.

  As indicated by point P5, when the heater ambient temperature Th is about 78 ° C. and the room temperature Ts is 20 ° C., Th-Ts is 58 ° C., and the controller 123 estimates that the energization voltage is about 100V. At this time, the controller 123 keeps the heater output at 400W.

  However, the heater output control according to the present invention is not limited to the above embodiment. For example, in the above embodiment, when it is determined in step S3-1 that the energization voltage is 95 V or less, the heater output is switched to “strong” for a certain time in step S4-1, but in step S3-1. When it is determined that the energization voltage is equal to or lower than a predetermined value, a mode of notifying the user of a low voltage error may be employed. Specifically, when the heater ambient temperature Th is 29 to 36 ° C., the room temperature Ts is 1 to 8 ° C., the Th-Ts is 21 to 35 ° C., and the estimated power consumption is 291 W to 330 W, the estimation is performed in step S3-1. If the energized voltage is 91V or less, low voltage error notification may be performed as shown in Q88.

  Similarly, if it is determined in step S10-1 that the energization voltage is 105 V or higher, the heater output is switched to “weak” for a certain time in step S11-1, but the energization voltage is predetermined in step S11-1. If it is determined that the value is equal to or greater than the value, a form of notifying the user of a high voltage error may be employed. Specifically, when the heater ambient temperature Th is 93 to 100 ° C., the room temperature Ts is 1 to 8 ° C., the Th-Ts is 85 to 99 ° C., and the estimated power consumption is 470 W to 509 W, the estimation is performed in step S10-1. If the energized voltage is 108V or higher, a high voltage error notification may be performed as shown in Q111.

  In the embodiment, the heater output is switched to “weak” or “strong” as the heating operation control of the heater 64. However, the heater 64 is turned on or off while the heater output is kept constant, and the heater 64 drive time is changed. By controlling the above, the heating operation of the heater may be controlled. In the flowchart shown in FIG. 12, when the control device 123 determines in step S3-2 that the energization voltage is 97 V or less, the process proceeds to step S4-2, and the heater 64 is kept on. Then, the energization voltage is estimated again, and when the controller 123 determines that the energization voltage is 97 V or less in step S7-2, the process returns to step S4-2, and the heater 64 is kept on. If the controller 123 determines in step S7-2 that the energization voltage is greater than 97V, the process returns to step S1.

  If the controller 123 determines in step S8-2 that the energization voltage is between 97V and 103V, the process proceeds to step S9-2, and the heater 64 drive time is switched to a cycle of 106 seconds on and 14 seconds off. Then, the process returns to step S1.

  If the controller 123 determines in step S10-2 that the energization voltage is 103V or higher, the process proceeds to step S11-2, and the driving time of the heater 64 is switched to a cycle of 93 seconds on and 27 seconds off. And it progresses to step S12, and the control apparatus 123 calculates Th-Ts again, estimates power consumption, and estimates the electricity supply voltage to a heater by step S13. When the controller 123 determines that the energization voltage is 103 V or higher in step S14-2, the process returns to step S11-2, and the driving time of the heater 64 is switched again to a cycle of 93 seconds on and 27 seconds off. If the controller 123 determines in step S14-2 that the energization voltage is lower than 103V, the process returns to step S1.

  With the above configuration, when the energization voltage to the heater 64 is high and the amount of heat generated by the heater is large, the driving time of the heater 64 is switched to be shortened. Therefore, by reducing the heat generation amount of the heater, the heating temperature of the dehumidifying rotor is also reduced, and the dehumidifying rotor 51 can be prevented from being deteriorated by heat.

Further, as the heating operation control of the heater 64, a configuration in which the resistance value of the heater 64 is switched can be adopted. As shown in FIG. 13A, the heater 64 used here includes a first heater 131a having a resistance of 22.2Ω, a second heater 132a having a resistance of 25.0Ω, and a third heater having a resistance of 28.6Ω. A heater 133a is connected in parallel. Moreover, the voltage of the power supply 134 connected to these heaters 131a, 132a, 133a is 100V. In this heater 64, the first relay 131b connected in series with the first heater 131a is turned on, and the second relay 132b connected in series with the second heater 132a and the third relay connected in series with the third heater 133a. By turning off the relay 133b, the heating operation of the heater can be “strong”. At this time, the heater heat generation amount W = 100 ² /22.2=450 W. Next, the heating operation of the heater 64 can be set to “medium” by turning on the second relay 132b and turning off the first relay 131b and the third relay 133b. At this time, the heater heat generation amount W = 100 ² /25.0=400 W. The heating operation of the heater 64 can be made “weak” by turning on the third relay 133b and turning off the first relay 131b and the second relay 132b. At this time, the heater heat generation amount W = 100 ² /28.6=350 W. The heater 64 is set to “medium” during normal operation.

  In FIG. 13A, the heating value of the heater is controlled by switching to the first heater 131a, the second heater 132a, or the third heater 133a having different resistance values. However, as shown in FIG. By connecting the fourth heater 135a and the fifth heater 136a having the same 200Ω and the sixth heater 137a having a resistance value of 28.6Ω in parallel, the fourth relay 135b, the fifth relay 136b, or the sixth relay 137b is switched. A configuration for switching the resistance may also be adopted.

In the heater 64, the fourth relay 135b, the fifth relay 136b, and the sixth relay 137b are turned on, so that the heating operation of the heater 64 can be “strong”. At this time, the heater heating value ^{W = 100 2/200 + 100} 2/200 + 100 2 /28.0=450W. Next, the heating operation of the heater can be set to “medium” by turning on the fifth relay 136b and the sixth relay 137b and turning off the fourth relay 135b. At this time, the heater heating value ^{W = 100 2/200 + 100} 2 /28.6=400W. Then, by turning on the sixth relay 137b and turning off the fourth relay 135b and the fifth relay 136b, the heating operation of the heater 64 can be made “weak”. At this time, the heater heat generation amount W = 100 ² /28.6=350 W. Thereby, the heating operation of the heater 64 can be switched between “weak”, “medium”, and “strong” in the same manner as described above.

11 Dehumidifier 51 Dehumidification rotor (dehumidification means)
64 Heater (heating means)
121 heater thermistor (heating means ambient temperature detection means)
122 Room temperature thermistor (room temperature detection means)
123 Control device (control means)

Claims (9)

In a dehumidifier having dehumidifying means for dehumidifying air taken in from the outside, and heating means for regenerating the dehumidifying means by evaporating the moisture adsorbed on the dehumidifying means by heating,
Heating means ambient temperature detection means for detecting the temperature around the heating means;
Room temperature detection means for detecting room temperature;
Control means for controlling the heating operation of the heating means based on the ambient temperature of the heating means detected by the heating means ambient temperature detection means and the room temperature detected by the room temperature detection means;
A dehumidifier characterized by comprising:   The control means estimates the power consumption of the heating means from the ambient temperature and room temperature of the heating means, further estimates an energization voltage to the heating means from the power consumption, and heats the heating means based on the energization voltage. The dehumidifier according to claim 1, wherein the operation is controlled.   The dehumidifier according to claim 2, wherein the heating operation of the heating unit is controlled by switching an output of the heating unit.   The dehumidifier according to claim 3, wherein the control means increases the output of the heating means when the energization voltage to the heating means is smaller than a first threshold value.   The dehumidifier according to claim 3 or 4, wherein when the energization voltage to the heating unit is larger than a second threshold value, the control unit decreases the output of the heating unit.   The dehumidifier according to claim 1 or 2, wherein the heating operation of the heating unit is controlled by turning on or off the energization of the heating unit.   The dehumidifier according to claim 2, wherein the heating operation of the heating unit is controlled by switching a resistance value of the heating unit.   The dehumidifier according to claim 7, wherein when the energization voltage to the heating unit is smaller than a first threshold, the control unit switches so that the resistance value of the heating unit decreases.   The dehumidifier according to claim 7 or 8, wherein when the energization voltage to the heating unit is greater than a second threshold, the control unit switches so that the resistance value of the heating unit increases.

Images