JP7199641B2 - mist sprayer - Google Patents

Description

TECHNICAL FIELD The present invention relates to a mist spraying device for spraying mist into a bathroom, and more particularly to a mist spraying device capable of spraying tap water containing electrolyzed water having a sterilizing effect.

2. Description of the Related Art Conventionally, a mist spraying device for spraying tap water or heated tap water into a bathroom has been widely used. For example, as disclosed in Patent Document 1, a mist spraying device is known that heats clean water by heat exchange with warm water heated by a heat source device and sprays high-temperature mist from a mist nozzle.

The mist spraying device of Patent Document 1 is electrolyzed water having a bactericidal action containing hypochlorous acid generated by energizing the tap water by utilizing the fact that the tap water supplied from the tap water contains chlorine. It is equipped with an electrolyzed water generator that generates By spraying tap water containing the electrolyzed water in the bathroom as a mist, the germicidal action of the electrolyzed water can suppress the generation and growth of mold and the like in the bathroom.

JP 2018-82795 A

In order to spray clean water containing electrolyzed water with sufficient sterilization action, it is necessary to adjust the amount of hypochlorous acid produced according to the spray amount from the mist nozzle, that is, the flow rate of the clean water to be sprayed. is necessary. Hypochlorous acid is generated by electrolyzing a portion of the water by energizing between multiple electrodes immersed in tap water, and the amount of hypochlorous acid generated is proportional to the amount of electricity. . Also, the amount of spray from the mist nozzle depends on the supply pressure of tap water.

Since the supply pressure of clean water varies depending on the area and environment where the mist spray device is installed, the supply pressure is set within the specified range specified in the specifications of the mist spray device. are different, the flow rate of clean water sprayed from the mist nozzle is not constant. In addition, since the supply pressure of clean water fluctuates due to the use of clean water at other faucets or the like during spraying, the flow rate of the clean water to be sprayed also fluctuates.

Disposing a flow rate sensor or the like for detecting the flow rate of clean water that is not constant in this manner increases the manufacturing cost of the mist spray device, which is not preferable. Absent. Therefore, in order to ensure a sufficient sterilization effect regardless of the flow rate of clean water, the amount of energization is set according to the maximum flow rate of clean water when the supply pressure is at the upper limit of the predetermined range. Therefore, when the flow rate of the tap water is smaller than the maximum flow rate, an excessive amount of energization is set, resulting in wasteful power consumption and a shortened service life of the electrodes.

SUMMARY OF THE INVENTION An object of the present invention is to provide a mist spraying device capable of adjusting the amount of electricity supplied according to the flow rate of clean water without using a flow rate sensor or the like.

The mist spraying device of the first aspect of the invention comprises a mist nozzle for spraying clean water into a bathroom, a mist water passage for supplying clean water to the mist nozzle, and the mist water passage for heating the clean water. heating means interposed in the mist water passage to generate electrolyzed water containing hypochlorous acid by energizing the water supply; In the mist spraying device having control means, the heating means includes a heat exchanger for heat exchange between hot water circulating with an external heat source machine and tap water, and the electrolyzed water generating means is for energization. The control means adjusts the temperature and flow rate of the hot water to adjust the temperature after heating of the hot water, and either the temperature or the flow rate of the hot water or It is characterized by adjusting the amount of energization between the plurality of electrodes according to the water supply flow rate estimated based on both.

According to the above configuration, the flow rate of the clean water to be sprayed is estimated based on one or both of the temperature and the flow rate of the hot water circulated to heat the clean water, and electrolysis is performed according to the estimated clean water flow rate. It adjusts the amount of energization between the plurality of electrodes of the water generating means. Therefore, it is possible to adjust the amount of energization between the electrodes of the electrolyzed water generating means without using a flow sensor or the like.

The mist spraying device of the invention of claim 2 is characterized in that, in the invention of claim 1, the control means controls the electricity supply according to the water supply flow rate estimated based on the past actual values or current values of the temperature and flow rate of the hot water. It is characterized by adjusting the amount.

According to the above configuration, when the clean water is sprayed without heating, based on the past actual values of the hot water temperature and flow rate, when the clean water is heated and sprayed, the hot water temperature and flow rate Based on the actual value or current value of , the flow rate of the sprayed clean water is estimated, and the amount of energization between the electrodes of the electrolyzed water generating means is adjusted according to the estimated clean water flow rate. Therefore, it is possible to adjust the amount of energization between the electrodes of the electrolyzed water generating means without using a flow sensor or the like.

The mist spraying device of the invention of claim 3 is the invention of claim 1 or 2, further comprising a flow rate adjustment valve for adjusting the flow rate of the hot water, wherein the control means is proportional to the opening of the flow rate adjustment valve. It is characterized in that the amount of energization is adjusted so as to

According to the above configuration, reflecting that the larger the flow rate of the clean water to be heated and sprayed, the larger the flow rate of the circulated hot water, the flow rate is proportional to the opening of the flow control valve, which is proportional to the flow rate of the circulated hot water. The amount of energization between the electrodes of the electrolyzed water generating means is adjusted. Therefore, it is possible to adjust the energization amount between the plurality of electrodes of the electrolyzed water generating means according to the estimated water supply flow rate.

The mist spraying device of the invention of claim 4 is, in the invention of any one of claims 1 to 3, a first temperature sensor for detecting the temperature of the hot water supplied to the heat exchanger; further comprising a second temperature sensor for detecting the temperature of the hot water after the heat exchange with, the control means is proportional to the temperature difference obtained by subtracting the temperature detected by the second temperature sensor from the temperature detected by the first temperature sensor It is characterized in that the amount of energization is adjusted so as to

According to the above configuration, it is proportional to the difference in temperature of the circulating hot water before and after the heat exchange, reflecting that the larger the difference in temperature before and after the heat exchange in the heat exchanger of the circulating hot water, the larger the flow rate of the clean water to be heated. The amount of energization between the electrodes of the electrolyzed water generating means is adjusted as follows. Therefore, it is possible to adjust the energization amount between the plurality of electrodes of the electrolyzed water generating means according to the estimated water supply flow rate.

According to the mist spraying device of the present invention, the amount of energization can be adjusted according to the flow rate of clean water without using a flow rate sensor or the like.

1 is a system configuration diagram of a bathroom equipped with a mist spraying device according to an embodiment of the present invention; FIG. 1 is a configuration diagram of a mist spraying device according to an embodiment of the present invention; FIG.

EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing this invention is demonstrated based on an Example.

First, the system configuration of the bathroom 1 will be described based on FIG.
A heat source machine 2 for supplying hot water to a bathroom 1 is installed outdoors. In the vicinity of the ceiling of the bathroom 1, the air taken from the bathroom 1 is warmed by the heat of hot water supplied from the external heat source device 2 as shown by arrow A, and the air is blown as shown by arrow B to heat the bathroom 1. A ceiling cassette type bathroom heater 3 is installed. The heat source device 2 may have a function of heating tap water to supply hot water to the hot water tap 21, the shower 22, and the bathtub 23 in the bathroom 1, a function of reheating the hot water in the bathtub 23, and the like. Further, the heat source device 2 may also be configured to supply hot water and heat to areas other than the bathroom 1 .

The bathroom heater 3 is equipped with a plurality of mist nozzles 3a for spraying tap water into the bathroom 1. - 特許庁Further, the bathroom heater 3 is equipped with a mist unit 11 having a heating means for heating the water supplied from the water supply passage 5 connected to the water supply by utilizing the heat of the hot water supplied from the heat source device 2. . The mist spraying device 10 is configured by connecting the mist unit 11 to the plurality of mist nozzles 3 a through the mist water passages 13 .

The heat source device 2 is, for example, a combustion-type heat source device that supplies hot water heated by using the combustion heat of fuel. There may be. The heat source machine 2 is connected with a heating forward passage 6 for supplying heated hot water to the bathroom heater 3 and a heating return passage 7 for returning the warm water used for heating by the bathroom heater 3. - 特許庁Although not shown, hot water is circulated between the heat source device 2 and the bathroom heater 3 through the heating forward passage 6 and the heating return passage 7 by, for example, a built-in pump of the heat source device 2 or the like.

Next, the bathroom heating device 3 and the mist spray device 10 will be described with reference to FIG.
The bathroom heater 3 includes a heating heat exchanger 3c for heat exchange between hot water supplied from the heat source device 2 and the air in the bathroom 1, and a blower fan 3d. The bathroom heater 3 drives the blower fan 3d to blow the air in the bathroom 1 to the heating heat exchanger 3c, and performs a heating operation in which the air warmed by the heating heat exchanger 3c is blown to the bathroom 1. .

The bathroom heater 3 includes a bathroom temperature sensor 3e for detecting the temperature of the bathroom 1, a humidity sensor 3f for detecting the humidity in the bathroom 1, a blower fan 3d, various sensors, a heat source device 2, a mist spray device 10, and the like. A heating controller 3g that is communicably connected and controls heating operation and the like is provided. The bathroom heater 3 may be provided with an exhaust port 3h for exhausting the air in the bathroom 1 and a ventilation fan 3i.

A heating forward passage 6 and a heating return passage 7 are connected to a heat transfer tube having a plurality of fins of the heating heat exchanger 3c. The bathroom heater 3 has a thermal valve 6 a for opening and closing the heating passage 6 , and a hot water outlet temperature sensor 6 b (first temperature sensor) for detecting the temperature of hot water supplied from the heat source device 2 . The bathroom heater 3 also has a heating return temperature sensor 7a for detecting the temperature of hot water flowing through the heating return passage 7 after heat exchange with the air in the bathroom 1 in the heating heat exchanger 3c. The thermal valve 6a, the hot water supply temperature sensor 6b, and the heating return temperature sensor 7a are also communicably connected to the heating controller 3g.

The mist spraying device 10 has a mist water passage 13 for supplying clean water supplied from the water supply passage 5 to the mist unit 11 to the plurality of mist nozzles 3a. The plurality of mist nozzles 3a each have an on-off valve for switching between spraying and spraying stop.

The mist unit 11 has a heating means 14, an electrolytic device 15 (electrolyzed water generating means), and an on-off valve 16 (solenoid valve). A heating means 14 is interposed in the mist water passage 13 to heat the clean water in the mist water passage 13 . The electrolyzer 15 is interposed in the mist water passage 13 to generate electrolyzed water containing hypochlorous acid by energizing clean water in the mist water passage 13 . The on-off valve 16 is opened during mist spraying and closed when spraying is stopped. The heating means 14 and the electrolytic device 15 are installed in series in the mist water passage 13, but are installed in parallel and connected by a distribution valve or a plurality of on-off valves to supply clean water to one or both of them. A distribution means may be configured.

The heating means 14 is a mist that exchanges heat between hot water in a bypass passage 8 that bypasses a heating heat exchanger 3c that is branched from a heating forward passage 6 and connected to a heating return passage 7, and clean water in a mist water passage 13. It has a heat exchanger 14a for On the upstream side of the mist heat exchanger 14a in the bypass passage 8, a flow rate adjustment valve 14b for adjusting the flow rate of hot water circulated between the mist heat exchanger 14a and the heat source device 2 is arranged. . A hot water return temperature sensor 14c (second temperature sensor) for detecting the temperature of the hot water after heat exchange in the mist heat exchanger 14a is disposed downstream of the mist heat exchanger 14a in the bypass passage 8. ing.

A mist water temperature sensor 13a for detecting the temperature of tap water sprayed from the plurality of mist nozzles 3a is arranged downstream of the mist heat exchanger 14a in the mist water passage 13. As shown in FIG. The on-off valve of the mist nozzle 3a, the on-off valve 16 of the mist unit 11, the flow control valve 14b, the mist water temperature sensor 13a, the warm water return temperature sensor 14c, the electrolytic device 15, etc. are also used as control means for the mist spraying device 10, and the heating controller 3g communicatively connected to

The heating controller 3g is connected to a bathroom operation terminal R1 and an outside bathroom operation terminal R2 for starting and stopping a heating operation, a hot water mist operation, etc., which will be described later, and setting the temperature. In addition, the mist spraying device 10 may have a dedicated controller as a control means, and may be connected to the heating controller 3g and the controller of the heat source device 2 for communication, and may be configured to cooperate with these. It may be configured to be used as control means for the mist spray device 10 .

The electrolytic device 15 has a plurality of electrodes (not shown) that are immersed in clean water flowing through the mist water passage 13, and electrolyzes a portion of the clean water by energizing the electrodes. Since the tap water supplied from the tap water contains chlorine (chloride ions), electrolyzed water containing hypochlorous acid is generated by electrolyzing the tap water. The amount of hypochlorous acid contained in electrolyzed water is expressed as the effective chlorine concentration, and the generated electrolyzed water has an effective chlorine concentration of about 10 ppm at maximum, but the higher the effective chlorine concentration, the stronger the sterilization effect against mold and the like. . The clean water containing the generated electrolyzed water having a bactericidal action is sprayed into the bathroom 1 from a plurality of mist nozzles 3a.

Generally, the concentration of available chlorine in electrolyzed water is proportional to the amount of current flowing between the electrodes. Since the clean water flowing through the mist water passage 13 is energized, the effective chlorine concentration is proportional to the current value at the time of energization and inversely proportional to the flow rate of the clean water. Therefore, in order to obtain a sufficient sterilization effect, the heating controller 3g adjusts the current value as the amount of energization according to the flow rate of the tap water. It should be noted that the energization may be intermittent for the generation of electrolyzed water. In this case, the amount of energization is adjusted by adjusting the current value, the energization time, and the non-energization time.

Next, the warm water mist operation for spraying heated clean water will be described.
When the hot water mist operation is started, the heating controller 3g transmits information such as the temperature of hot water for the hot water mist operation to the heat source device 2 to operate the heat source device 2 to circulate the hot water. Further, the heating controller 3g opens the on-off valve 16 of the mist water passage 13 and the on-off valves of the plurality of mist nozzles 3a, and sprays clean water heated by the mist heat exchanger 14a from the plurality of mist nozzles 3a. Let The bathroom heater 3 may perform the heating operation simultaneously with the hot water mist operation. When the warm water mist operation is stopped, the heating controller 3g sets the flow control valve 14b to the closed opening degree and closes the on-off valve 16 and the like. If the heating operation is not performed, the heat source device 2 is also stopped.

During the hot water mist operation, the heating controller 3g detects the temperature detected by the mist water temperature sensor 13a, which detects the temperature of clean water after heating, based on the temperature detected by the hot water outgoing temperature sensor 6b and the temperature detected by the hot water return temperature sensor 14c. The flow rate of hot water circulated through the mist heat exchanger 14a is adjusted by adjusting the degree of opening of the flow regulating valve 14b so as to obtain a preset temperature. For example, when the temperature of the hot water is low immediately after the hot water mist operation is started, the opening of the flow control valve 14b is increased, and when the temperature of the hot water stabilizes, the opening of the flow control valve 14b is adjusted based on each detected temperature.

At this time, the heating controller 3g determines the temperature difference (difference in temperature between forward and return hot water) obtained by subtracting the temperature sensed by the hot water return temperature sensor 14c from the temperature sensed by the hot water forward temperature sensor 6b, and the opening degree of the flow control valve 14b. Based on the corresponding flow rate of hot water, the amount of heat used to heat the tap water flowing through the mist water passage 13 is calculated. The flow rate of hot water corresponding to the degree of opening of the flow rate control valve 14b is determined in advance by testing or the like, and the heating controller 3g stores a correspondence table or the like between the degree of opening and the flow rate.

In general, tap water fluctuates seasonally within a range of about 0 to 30°C, but since it is unlikely to fluctuate greatly instantaneously, it is regarded as a constant temperature (for example, 15°C) and flows through the mist water passage 13. Based on the amount of heat used to heat the clean water, the heating controller 3g estimates the flow rate of clean water flowing through the mist water passage 13 (clean water flow rate). The heating controller 3g updates and stores actual values such as the estimated water supply flow rate of the hot water mist operation, the flow rate of the hot water, and the temperature difference between the incoming and outgoing hot water. The temperature of the clean water that is regarded as constant may be changed according to the season, and if the heat source device 2 is a hot water supply device, the detected temperature of the water supply temperature sensor normally provided can be used as the temperature of the clean water.

Next, the cold water mist operation in which clean water is sprayed without being heated will be described.
When the cold water mist operation is started, the on-off valve 16 of the mist water passage 13 and the on-off valves of the plurality of mist nozzles 3a are opened, and the tap water supplied from the water supply is sprayed from the plurality of mist nozzles 3a. When the cold water mist operation is stopped, the heating controller 3g closes the on-off valve 16 and the like.

Next, an electrolyzed water mist operation for spraying clean water containing electrolyzed water generated by the electrolyzer 15 will be described.
Electrolyzed water mist operation is performed when cleaning the bathroom 1 or the like in order to suppress the generation and propagation of mold by using the bactericidal action of the electrolyzed water. When the electrolyzed water mist operation is started, the opening/closing valve 16 of the mist water passage 13 and the opening/closing valves of the plurality of mist nozzles 3a are opened as in the cold water mist operation. At the same time, the clean water flowing through the mist water passage 13 is energized in the electrolytic device 15 to generate electrolyzed water having a sterilizing action, and the clean water containing the electrolyzed water is sprayed from the plurality of mist nozzles 3a.

The heating controller 3g stores actual values such as the water flow rate estimated during the hot water mist operation in the past, the temperature difference between the hot water going and returning, and the hot water flow rate. Therefore, the heating controller 3g assumes that the actual value of the water supply flow rate is the same as the flow rate of the water supply during the electrolyzed water mist operation this time, and energizes the electrolytic device 15 so as to be proportional to the actual value of the water supply flow rate. Adjust quantity. As a result, even if the water supply flow rate cannot be estimated from the hot water flow rate, etc., because the water supply is not heated, there is less power consumption and less power consumption compared to when the amount of electricity is set according to the maximum flow rate of the water supply. It is possible to suppress the shortening of the service life of the electrode, and to maintain the effective chlorine concentration of the electrolyzed water regardless of the flow rate of the tap water, thereby ensuring a constant sterilization effect.

The heating controller 3g can also adjust the energization amount of the electrolytic device 15 so as to be proportional to the water supply flow rate, which can be estimated to some extent from the actual value of the difference in temperature between forward and return hot water or the actual value of the flow rate of hot water. In addition, the water flow rate is estimated from the amount of heat used for heating the water, which is calculated based on the actual value of the temperature difference and the actual value of the flow rate of the hot water. can also be adjusted. Therefore, even if the water supply flow rate cannot be estimated from the hot water flow rate, etc., because the water supply is not heated, the water supply flow rate estimated based on the actual values of the hot water temperature and flow rate during the past hot water mist operation can be used. The amount of energization can be adjusted.

In the electrolyzed water mist operation, it is also possible to spray heated clean water containing electrolyzed water, as in the hot water mist operation. The heating controller 3g adjusts the amount of electricity supplied to the electrolytic device 15 based on the stored actual value of the water supply flow rate, the actual value of the temperature difference between the incoming and outgoing hot water, and the actual value of the hot water flow rate, as in the case of no heating. can be adjusted. As a result, compared to the case where the energization amount is set according to the maximum flow rate of the clean water, wasteful power consumption and shortening of the service life of the electrodes can be suppressed, and the electrolyzed water can be discharged regardless of the flow rate of the clean water. A constant bactericidal action can be secured by maintaining the effective chlorine concentration.

In addition, the heating controller 3g adjusts the flow rate of hot water circulated in the mist heat exchanger 14a in order to spray the heated clean water containing electrolyzed water, as in the hot water mist operation. is adjusting the adjustment. Therefore, the current water supply flow rate can be estimated, and the amount of electricity supplied to the electrolytic device 15 can be adjusted so as to be proportional to the estimated current water supply flow rate. Since the energization amount is adjusted according to the estimated current water flow rate, compared to the case where the energization amount is set according to the maximum water flow rate, wasteful power consumption and shortening of the service life of the electrodes can be suppressed. , it is possible to maintain a constant sterilization action by maintaining the effective chlorine concentration of the electrolyzed water. In particular, since the water supply pressure in the water supply passage 5 was lowered due to the use of water supply (for example, the use of the shower 22) at the same time as the hot water mist operation in the past, the actual value of the water supply flow rate is stored. useful when When the electrolyzed water mist operation is stopped, the heating controller 3g closes the on-off valve 16 and the like of the mist water passage 13 that has been opened, and stops energization of the electrolytic device 15. FIG.

The action and effects of the present invention will be described.
The mist spraying device 10 estimates the flow rate of the clean water to be sprayed based on one or both of the temperature and the flow rate of the hot water to be circulated, and energizes the electrodes of the electrolytic device 15 according to the estimated clean water flow rate. Adjust quantity. Therefore, it is possible to adjust the amount of energization between the plurality of electrodes of the electrolytic device 15 according to the flow rate of tap water without using a flow rate sensor or the like. As a result, compared to the case where the energization amount is set according to the maximum flow rate of the clean water, wasteful power consumption and shortening of the service life of the electrodes can be suppressed, and the electrolyzed water can be discharged regardless of the flow rate of the clean water. A constant bactericidal action can be secured by maintaining the effective chlorine concentration.

Further, the heating controller 3g estimates the water flow rate based on past performance values or current values of the temperature and flow rate of the hot water to be circulated, and adjusts the amount of electricity supplied to the electrolytic device 15 according to the water flow rate. Therefore, in either case of spraying clean water containing electrolyzed water without heating it or when it is heated and sprayed, the amount of energization between the plurality of electrodes of the electrolytic device 15 is adjusted according to the flow rate of clean water. be able to.

The heating controller 3g adjusts the flow rate of hot water to be circulated through the mist heat exchanger 14a by adjusting the opening of the flow control valve 14b, and energizes the electrolytic device 15 in proportion to the opening of the flow control valve 14b. Adjust quantity. Therefore, reflecting the fact that the larger the flow rate of circulating hot water is, the larger the flow rate of the clean water to be heated and sprayed is, the electrolytic device 15 is adjusted to be proportional to the opening of the flow control valve 14b, which is proportional to the flow rate of circulating hot water. It is possible to adjust the amount of energization between the plurality of electrodes.

The heating controller 3g adjusts the amount of energization so as to be proportional to the temperature difference (difference in temperature between forward and return hot water) obtained by subtracting the temperature sensed by the warm water return temperature sensor 14c from the temperature sensed by the hot water forward temperature sensor 6b. Therefore, the greater the difference in temperature between before and after heat exchange in the circulating hot water mist heat exchanger 14a, the greater the flow rate of the clean water to be heated. The amount of energization between the electrodes of device 15 can be adjusted.

The bathroom heater 3 provided with the mist nozzle 3a may be of a wall-mounted type, and the mist unit 11 is configured separately from the bathroom heater 3 and heats by circulating hot water between it and the heat source machine 2. It may be connected so as to spray clean water from the mist nozzle 3a. In addition, those skilled in the art can implement various modifications to the above-described embodiments without departing from the scope of the present invention, and the present invention includes such modifications.

1: bathroom 2: heat source device 3: bathroom heating device 3a: mist nozzle 3c: heating heat exchanger 3g: heating controller (control means)
5: water supply passage 6: passage for heating 6b: temperature sensor for hot water (first temperature sensor)
7: Heating return passage 8: Bypass passage 10: Mist spray device 11: Mist unit 13: Mist water passage 13a: Mist water temperature sensor 14: Heating means 14a: Heat exchanger for mist (heat exchanger)
14b: flow control valve 14c: warm water return temperature sensor (second temperature sensor)
15: electrolyzer (electrolyzed water generating means)

Claims (4)

a mist nozzle for spraying clean water into a bathroom; a mist water passage for supplying clean water to the mist nozzle; a heating means interposed in the mist water passage for heating the clean water; electrolyzed water generating means interposed in the mist water passage for generating electrolyzed water containing hypochlorous acid by energizing the mist spraying device having a control means for controlling the spraying of clean water,
The heating means comprises a heat exchanger for exchanging heat between hot water circulating with an external heat source and tap water,
The electrolyzed water generating means comprises a plurality of electrodes immersed in clean water for energization,
The control means adjusts the temperature and flow rate of the hot water to adjust the temperature of the tap water after heating, and according to the tap water flow rate estimated based on one or both of the temperature and flow rate of the hot water A mist spraying device, wherein an amount of electricity between the plurality of electrodes is adjusted. 2. The mist spraying device according to claim 1, wherein the control means adjusts the energization amount in accordance with a water supply flow rate estimated based on past actual values or current values of the temperature and flow rate of the hot water. . Further comprising a flow rate adjustment valve for adjusting the flow rate of the hot water,
3. A mist spraying device according to claim 1, wherein said control means adjusts said amount of electricity in proportion to the degree of opening of said flow control valve. Further comprising a first temperature sensor for detecting the temperature of the hot water supplied to the heat exchanger and a second temperature sensor for detecting the temperature of the hot water after heat exchange with the heat exchanger,
4. The controller according to any one of claims 1 to 3, wherein the control means adjusts the amount of energization so as to be proportional to a temperature difference obtained by subtracting the temperature detected by the second temperature sensor from the temperature detected by the first temperature sensor. or the mist spraying device according to item 1.

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