KR20080023681A - Cleaning device using water-based cleaning liquid - Google Patents

Abstract

A cleaning device (1) using a water-based cleaning liquid is filled up with steam produced when the liquid is heated to high temperature. Conventionally, heating or drying the cleaning liquid has caused steam leakage, resulting in a large loss of heat energy. To solve this problem, the cleaning device (1) of the invention is provided with pressure difference measuring means (11) for measuring the pressure difference between the pressure in a gas discharge chamber (10) of the cleaning device (1) and the outside air pressure. The amount of discharge gas from the gas discharge chamber (10) is controlled in order that the pressure difference is a predetermined appropriate value, preventing a leakage of excessive steam and enabling the cleaning device to be always operated at an optimum exhaust air flow rate. A heat pump mechanism for recovering the heat of the discharge gas into the cleaning liquid in the cleaning device (1) is installed to re-use the energy dissipated along with the exhaust air. ® KIPO & WIPO 2008

Description

CLEANING DEVICE USING WATER-BASED CLEANING LIQUID}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a technique for saving energy in a washing apparatus using an aqueous washing liquid, particularly a washing apparatus.

Background Art Conventionally, many washing apparatuses using organic solvents have been used to wash machine parts and the like, but switching to an aqueous washing apparatus is actively performed due to environmental regulations.

The water-based cleaning apparatus sprays a water-based cleaning solution into a to-be-cleaned object, or immerses the object into a high-temperature water-based cleaning solution, and adheres the oil or foreign matter to the object to be cleaned. And so on.

In such a washing apparatus, water vapor is filled inside the washing apparatus during washing. This water vapor leaks from the cleaning object inlet or the outlet of the cleaning device, worsens the working environment, and deteriorates the drying performance in the dehydration process or the drying process. For this reason, the water-based washing | cleaning apparatus is normally provided with the exhaust apparatus for exhausting internal water vapor (patent document 1).

Patent document 1; Japanese Laid-Open Patent Publication No. 07-290007 ([0031], Fig. 1)

(Tasks to be solved by the invention)

The first problem of such an aqueous cleaning apparatus is that a large amount of thermal energy is required for heating or drying the cleaning liquid. This heat energy is hardly recovered and disappears, and especially, the heat of vaporization with water vapor discharged from the exhaust of the washing apparatus occupies a large part.

In particular, if the exhaust air volume is increased to reduce the amount of water vapor leaking from the cleaning device or to reduce the humidity inside the cleaning device, not only the running heat energy is increased but also the outside air is cleaned. As a large amount flows into the apparatus to cool the aqueous cleaning liquid, the loss of thermal energy is further increased.

In addition, since the ventilation resistance of the exhaust duct connected to the exhaust device of the cleaning device varies depending on its diameter, length, number of bends, etc., it is difficult to set the exhaust air amount of the exhaust device to an optimum value in advance. In addition, although the exhaust air volume is regulated by a damper or the like installed in the exhaust duct, it is not easy to find the optimum value of the exhaust air volume at the operation site. Therefore, the damper is normally opened so that the exhaust volume is larger than the optimum value. In many cases, an angle is set.

The second problem of the water-based cleaning apparatus is that even if the exhaust air volume can be adjusted to an appropriate amount, it is impossible to prevent the heat energy dissipated by the exhaust.

(Means to solve the task)

The first cleaning device according to the present invention made to solve the first problem, in the cleaning device using an aqueous cleaning liquid,

a) conveying means for conveying the object to be cleaned;

b) a spray nozzle for spraying and cleaning a heated aqueous cleaning liquid onto the object to be cleaned;

c) an air blow nozzle which inhales the air inside the cleaning device to restrict the vicinity of the jet port and blows off the water attached to the object to be cleaned;

d) exhaust means for exhausting air including water vapor in the cleaning apparatus from the exhaust chamber provided in the cleaning object inlet of the cleaning apparatus;

e) a pressure difference measuring means for measuring a pressure difference between the atmospheric pressure of the outside air and the pressure of the exhaust chamber;

and f) control means for controlling the exhaust air volume of the exhaust means based on the atmospheric pressure difference data measured by the pressure difference measurement means.

Here, it is preferable that the said exhaust means exhausts the air containing water vapor from the exhaust chamber provided in the to-be-injected | cleaned object part.

As a conveying means, it is preferable to set it as the conveyor type which has a net shape. In this way, the spray nozzle and the air blow nozzle are installed above and below the conveyor, so that the cleaning liquid can be injected from above and below the object to be cleaned, and the air can be blown out.

It is preferable to provide a plurality of washing | cleaning chambers with a spray nozzle and a dehydration chamber provided with an air blow nozzle, respectively. As a result, more reliable washing and dehydration can be performed.

The control of the exhaust air volume by the exhaust means can be performed by adjusting the rotation speed of the exhaust fan, or can be performed by adjusting the opening angle of the damper provided in the exhaust passage.

The control means preferably controls the air pressure in the exhaust chamber so as to be 5 Pa lower from 0.1 Pa than the atmospheric pressure. Or, it is more preferable to make the atmospheric pressure difference from 0.2 Pa to 2 Pa.

The washing apparatus according to the present invention is provided with a conveying means for conveying the object to be cleaned up and down and back and forth instead of the net conveyor conveying means, and the method to clean the object to be cleaned by immersing it in a cleaning tank having a heater and an ultrasonic generator. May be employed.

In this case, the exhaust means may exhaust the air in the cleaning device instead of or in addition to the exhaust chamber provided in the object to be cleaned, and an exhaust part provided in the object to be cleaned.

The present invention made to solve the second problem is characterized in that in the cleaning device, a heat pump mechanism for recovering the heat of the exhaust gas into the cleaning liquid.

This heat pump mechanism,

a) an evaporator installed in the exhaust means for providing heat to the heat medium in the exhaust,

b) compression means for compressing and liquefying the vaporized thermal medium;

c) condensing means for imparting heat of condensation of the liquefied heat medium to the cleaning liquid;

d) The expansion valve or capillary tube which vaporizes a thermal medium can be provided.

Further, in this washing apparatus, between the condensing means and the expansion valve or capillary tube,

a) with exhaust heat exchanger,

b) exhaust heat exchanger cooling means for cooling the exhaust heat exchanger;

c) temperature measuring means for measuring the temperature of the washing liquid flowing through the condensing means;

d) It is preferable to provide heat pump control means for controlling the compression means and the exhaust heat exchanger cooling means corresponding to the measured washing liquid temperature.

Further, in the heat pump control means,

a) temperature storage means for storing the next set temperatures T1 to T4;

Compression means operation start temperature T1

· Exhaust heat exchanger cooling means intermittent operation stop temperature T2

· Exhaust heat exchanger cooling means intermittent operation start temperature T3

· Exhaust heat exchanger cooling means continuous operation start temperature T4

b) comparing the temperature T of the cleaning liquid measured by the temperature measuring means with these set temperatures T1 to T4,

Stops the compression means when T <T1;

Driving the compression means when T1≤T,

When T3≤T <T4, the exhaust heat exchanger cooling means is intermittently operated,

When T4≤T, the exhaust heat exchanger cooling means is continuously operated,

To stop the exhaust heat exchanger cooling means when T <T2 after the exhaust heat exchanger cooling means starts operation.

It is preferable to provide a motion control means.

The set temperatures T1 to T4 memorized in the temperature storage means are assumed to be TW ° C. when the preferred use temperature (standard use temperature) of the aqueous cleaning liquid in the washing apparatus is set to TW ° C.

(TW-45) ° C≤T1≤ (TW-5) ° C

(TW-10) ° C≤T2≤TW ° C

(TW-5) ° C≤T3≤ (TW + 5) ° C

TW ° C≤T4≤ (TW + 10) ° C

0 ° C <T1 <T2 <T3 <T4

It is preferable to set it as.

or,

(TW-20) ° C≤T1≤ (TW-5) ° C

(TW-10) ° C≤T2≤TW ° C

(TW-5) ° C≤T3≤ (TW + 5) ° C

TW ° C≤T4≤ (TW + 10) ° C

0 ° C <T1 <T2 <T3 <T4

You may make it.

On the occasion of the intermittent operation of the exhaust heat exchanger cooling means, the operation control means determines the operation ratio of the exhaust heat exchanger cooling means.

{(T-T3) / (T4-T3)｝ × 100%

It is preferable to set it as.

When the exhaust heat exchanger cooling means is a fan, the operation control means sets the rotation speed R of the fan,

  R = 0 when T <T3

  When T3≤T <T4, R = (T-T3) / (T4-T3) x A x R0

  When T4≤T, R = A × R0

(Where A is a coefficient determined corresponding to the cooling area of the fan, a value of 0.1 to 1.0, and R0 is a rated rotational speed of the fan).

When the compression means for compressing and liquefying the vaporized thermal medium uses a motor, the operation control means may control the rotation speed of the motor continuously or stepwise. The motor can change the rotation speed continuously or stepwise by inverter control or the like. Thus, the motor may be decelerated when the temperature of the cleaning liquid approaches the target temperature, and stopped when the target temperature is reached.

On the other hand, the standard use temperature is generally 50 to 60 ° C, but when oil adheres high and the object to be cleaned can withstand high temperatures, the temperature may be 70 to 80 ° C. In the case of discoloration or oxidization, the temperature may be about 40 ° C.

(Effects of the Invention)

When the air blow is performed by introduction of outside air, air is discharged out of the washing apparatus unless water is discharged above the air for the air blow conveyed into the washing apparatus. In the first cleaning device according to the present invention, since the intake of the air blow is performed from inside the cleaning device, leakage of water vapor can be prevented, and the inside of the cleaning device is not cooled by outside air. In addition, since the exhaust air volume is adjusted by measuring the difference in atmospheric pressure between the atmospheric pressure and the atmospheric pressure of the exhaust chamber, the exhaust apparatus can always be operated at the optimum exhaust air volume even when the operating conditions and the shape of the exhaust duct are changed.

In particular, by adjusting (controlling) the exhaust air volume of the exhaust device so that the air pressure in the exhaust chamber of the cleaning device is lowered from 0.1 Pa to 5 Pa (preferably 0.2 Pa to 2 Pa) than the atmospheric pressure, the effect of preventing drying and leakage of water vapor is improved. The optimum amount of exhaust air can be achieved without harming.

In the second washing apparatus according to the present invention, the heat energy dissipated with the exhaust gas is recovered by an evaporator, and the collected heat energy is heated by the condensing means in the condensing means, thereby greatly reducing the dispersion of the heat energy, thereby reusing the heat energy. Run

Then, the temperature storage means and the operation control means are provided in the heat pump control means, and the operation of the compression means and the exhaust heat exchanger cooling means is controlled as described above in response to the temperature T of the cleaning liquid measured by the temperature measuring means, thereby recovering from exhaust. When the amount of heat is large, excess heat energy can be cooled by the exhaust heat exchanger cooling means, so that the temperature of the cleaning liquid can be easily adjusted, and the temperature fluctuation of the cleaning liquid can also be reduced.

The set temperatures T1 to T4 can be determined as follows. When the reference operating temperature of the aqueous cleaning liquid of the cleaning device is TW ° C,

(TW-45) ° C≤T1≤ (TW-5) ° C

(TW-10) ° C≤T2≤TW ° C

(TW-5) ° C≤T3≤ (TW + 5) ° C

TW ° C≤T4≤ (TW + 10) ° C

0 ° C <T1 <T2 <T3 <T4

Alternatively, when the reference operating temperature of the aqueous cleaning liquid of the washing apparatus is TW 占 폚,

(TW-20) ° C≤T1≤ (TW-5) ° C

(TW-10) ° C≤T2≤TW ° C

(TW-5) ° C≤T3≤ (TW + 5) ° C

TW ° C≤T4≤ (TW + 10) ° C

0 ° C <T1 <T2 <T3 <T4

May be set.

1 is a schematic configuration diagram of a cleaning device according to an embodiment of the present invention;

2 is an enlarged view of a washing chamber and a dehydration chamber of a washing apparatus according to one embodiment of the present invention;

3 is a schematic structural diagram showing another method of controlling the exhaust air volume of the exhaust means according to the embodiment of the present invention;

4 is a schematic configuration diagram of a separate cleaning device of one embodiment of the present invention;

5 is a schematic structural diagram showing another method of controlling the exhaust air volume of the exhaust means in one embodiment of the present invention;

6A is a schematic configuration diagram of a washing apparatus incorporating a heat pump according to one embodiment of the present invention;

6B is a schematic configuration diagram of a washing apparatus incorporating a heat pump according to one embodiment of the present invention;

6C is a schematic configuration diagram of a cleaning apparatus incorporating a heat pump according to one embodiment of the present invention;

7 is a schematic configuration diagram of another heat pump which is one embodiment of the present invention.

(Explanation of the sign)

1---Cleaning device

2---Slot

3---Outlet (取 出口)

4---Cleaning device

5---Washed object

10---Exhaust Room

11---Differential pressure gauge

12---Exhaust Room

13---Differential pressure gauge

20---Control Means

21---Computation Unit

22---Inverter

23---Servo Control Unit

24---Servo Motor

25---FLOW ADJUSTMENT DAMPER

26---Damper

50---Exhaust Duct

51---Exhaust Fan

70---Bounce Net

71---Front and rear conveying mechanism

72---Up and down transport mechanism

100---1st cleaning room

101---Cleaning Fluid Tank

102---Heater

103---Pump

104---Spray Nozzle

105---Ultrasonic Generator

106---Heat Exchanger

108---Intermediate Cleaning Tank

109---Final Wash Tank

110---1st Dehydration Room

111---Blower

112---Air Blow Intake Duct

113---Air Blow Nozzle

200---2nd cleaning room

201---Cleaning Fluid Tank

205---Ultrasonic Generator

210---Second Dehydration Room

220---Final Cleaning Room

231---Servo Control Unit

232---Servo Control Unit

241---Servo Motor

242---Servo Motor

251---Air Flow Adjustment Damper

252---FLOW ADJUSTMENT DAMPER

261---Damper

262---Damper

300---Drying Room

301---Intake vent

302---Hot Air Fan

303---Hot Air Heater

304---Outlet

501---Exhaust Duct

502---Exhaust Duct

600---Heat Pump Mechanism

601---Compression means (compressors)

602---Condensing means

603---Expansion valve or capillary tube

604---Evaporator

605---Circulation Pump

606---Exhaust Heat Exchanger

607---Cooling Fan

608---Water supply temperature measuring instrument (temperature sensor) (T)

609---Heat Pump Control

EMBODIMENT OF THE INVENTION Hereinafter, the Example of this invention is described based on drawing.

Example  One

1 is a schematic configuration diagram of a washing apparatus according to a first embodiment of the present invention, and FIG. 2 is a detailed view of the washing chamber and the dehydration chamber.

The washing | cleaning apparatus 1 of Example 1 is a net conveyor conveyance type | mold, and it is made to perform each process of washing | cleaning, dehydration, and drying, moving the to-be-cleaned object 5 by the conveying net 70. FIG. The exhaust chamber 10, the first cleaning chamber 100, the first dehydration chamber 110, and the second cleaning chamber 200 between the inlet 2 and the outlet 3 in the conveyance order of the object to be cleaned 5. ), The second dehydration chamber 210 and the drying chamber 300 are arranged in this order. In addition, this structure is an example and it does not matter even if the number and order of a washing | cleaning chamber, a dehydration chamber, and a drying chamber change.

The exhaust chamber 10 is provided with a differential pressure gauge 11 to measure the difference between the atmospheric pressure outside the atmosphere and the atmospheric pressure in the exhaust chamber. The measurement data is transmitted to the control device 20, and the optimum exhaust air volume is calculated by the calculation device 21 included therein. The data of the calculated optimum exhaust air volume is sent to the inverter 22 in the control apparatus 20, and the inverter 22 controls the rotation speed of the exhaust fan 51 which is an exhaust means based on the data. The exhaust fan 51 is provided in the middle of the exhaust duct 50 provided between the exhaust chamber 10 and the outside of the washing apparatus, and rotates to discharge air in the exhaust chamber 10 to the outside. As a result, the air in the exhaust chamber is exhausted out of the washing apparatus at the optimum flow rate.

A cleaning liquid tank 101 is disposed below the first cleaning chamber 100, and a heater 102 for heating the cleaning liquid is provided inside the cleaning liquid tank 101. The first cleaning liquid pipe extends upward from the lower side of the cleaning liquid tank 101, and the first cleaning liquid pipe is arranged to eject from the upper and lower portions of the conveying net 70 in the first cleaning chamber 100 toward the conveying net 70. It is connected to the spray nozzle 104. The pump 103 is provided in the middle of the 1st cleaning liquid piping. As a result, the aqueous cleaning liquid in the cleaning liquid tank 101 heated by the heater 102 is delivered to the pump 103, and is sprayed on the conveying net 70 from the spray nozzle 104 disposed above and below the conveying net 70. It is injected into the to-be-cleaned object 5 of the above, and it returns to the washing | cleaning liquid tank 101 by a water collecting duct.

The air blow nozzle 113 is arrange | positioned above and below the conveyance net 70 of the 1st dehydration chamber 110. As shown in FIG. The upper and lower air blow nozzles 113 are connected to the blower 111 which is a blowing means, and the intake side of the blower is opened into the first dehydration chamber 110 by the intake duct 112. Accordingly, the air in the first dehydration chamber 110 is blown up and down by the air blow nozzle 113 to the object to be cleaned, so that the water droplets of the cleaning liquid attached to the object to be cleaned are removed from the first cleaning chamber 100. do.

The to-be-cleaned object 5 on the conveyance net 70 which passed through the 1st washing chamber 100 and the 1st dehydration chamber 110 is the 2nd washing chamber 200 and the 2nd dehydration chamber 210. As it passes through, the structures and operations of the second cleaning chamber 200 and the second dehydration chamber 210 are the same as those of the first cleaning chamber 100 and the first dehydration chamber 110.

The to-be-cleaned object on the conveyance net 70 which passed through the 1st washing chamber 100, the 1st dehydration chamber 110, the 2nd washing chamber 200, and the 2nd dehydration chamber 210 is finally a drying chamber. Enter 300. In the drying chamber 300, a blowing port 304 that blows up and down the conveying net 70 is provided, and a pipe in which the inlet port 301 is opened into the drying chamber 300 is connected thereto. The hot air fan 302 and the hot air heater 303 are disposed in this pipe, and the air sucked in the drying chamber 300 is heated by the hot air heater 303, and the conveying net 70 is provided from the upper and lower jet ports 304. It will be flushed with the rinse of water.

The object to be cleaned and dried in this way is carried out from the outlet 3 of the washing apparatus.

In the washing apparatus of the present embodiment having the above structure, the air volume of the exhaust fan 51 for exhausting the air in the exhaust chamber 10 to the outside is controlled so that the air pressure in the exhaust chamber 10 is lowered from 0.1 Pa to 5 Pa lower than the atmospheric pressure. It is important to do. If the pressure difference is less than 0.1 Pa, water vapor filled in the cleaning chambers 100 and 200 passes through the exhaust chamber 10 and may leak from the inlet 2. Moreover, the water vapor of the 2nd washing | cleaning chamber 200 may flow into the 2nd dehydration chamber 210 or the drying chamber 300, and it may become a cause which a dryness falls. On the other hand, if the air pressure difference exceeds 5 Pa, the amount of air discharged from the exhaust chamber 10 increases, and a large amount of thermal energy is dissipated to the outside along with the exhaust. Moreover, since the outside air which flows in from the inlet 2 increases and the wind speed of the air which flows in becomes large, a part of outside air passes through the exhaust chamber 10, and flows in into the 1st washing chamber 100. FIG. Thereby, the washing | cleaning liquid injected from the spray nozzle 104 becomes cooling, and the operation rate of the heater 102 becomes high and energy consumption increases. On the other hand, the more preferable range of the pressure difference is 0.2 to 2 Pa.

Therefore, the controller 20 measures the difference between the atmospheric pressure and the atmospheric pressure difference between the exhaust chamber 10, and increases the rotation speed of the exhaust fan 51 when the pressure difference becomes less than 0.1 Pa (or less than 0.2 Pa). The frequency of the inverter 22 is increased so as to increase the frequency of the inverter 22, and the frequency of the inverter 22 is reduced to reduce the rotation speed of the exhaust fan 51 when the pressure difference exceeds 5 Pa (or 2 Pa). In this way, the energy consumed by the washing apparatus can be made the lowest by controlling the difference between the atmospheric pressure and the atmospheric pressure of the exhaust chamber 10 to always be in the range of 0.1 Pa to 5 Pa (or 0.2 Pa to 2 Pa).

In addition, as described above, the air blower in the first dehydration chamber 110 and the second dehydration chamber 210 intakes the air inside the washing apparatus, and the air blow in the air. Is preferably performed. When air blow is performed by introducing outside air, it is necessary to exhaust the amount of air or more into the washing apparatus, so that the amount of exhaust air increases, and the heat energy scattered with the exhaust increases. On the other hand, if the air inside the cleaning apparatus is inhaled and air blow is performed in the air as in the above-described embodiment, it is not necessary to increase the exhaust, and it is possible to prevent the increase of thermal energy scattering by the exhaust.

Example  2

3 is a schematic configuration diagram showing another method of controlling the exhaust air volume of the exhaust means, which is the second embodiment of the present invention.

The pressure difference data measured by the differential pressure gauge 11 is processed in the computing device 21 of the control device 20 as in the first embodiment. In this embodiment, in order to control the exhaust air volume, an air volume adjustment damper is provided on the ejection side of the exhaust fan 51 serving as the exhaust means. The opening angle of the damper 26 inside the air volume adjusting damper mechanism 25 is adjusted by the servomotor 24 having an angle adjusting function. The movement of the servomotor 24, that is, the opening angle of the damper 26, is controlled by the servo control unit 23 based on the command of the computing device 21. By adjusting the opening angle of the damper 26, it is the same as that of Example 1 to control so that the difference of atmospheric pressure and atmospheric pressure of the exhaust chamber 10 may always be in the range of 0.1 Pa to 5 Pa (or 2 Pa to 2 Pa).

Example  3

4 is a schematic configuration diagram of a separate cleaning device of a third embodiment of the present invention.

The cleaning device 4 of Example 3 is of an immersion ultrasonic wave type, and conveys the object to be cleaned 5 by the front and rear conveyance mechanism 71 and the up and down conveyance mechanism 72, and washes and dehydrates it. Each process will run. The first cleaning chamber 100, the second cleaning chamber 200, and the dehydration chamber 110 are arranged between the inlet 2 and the outlet 3 of the object to be cleaned in this order. The heaters 102 and 202 and the ultrasonic wave generators 105 and 205 are provided in the aqueous cleaning liquid tanks 101 and 201 of the first cleaning chamber 100 and the second cleaning chamber 200. The object to be cleaned 5 is first immersed in the cleaning liquid tank 101 by the upper and lower conveyance mechanism 72 in the first cleaning chamber 100, and then ultrasonically cleaned in the cleaning liquid heated to 50 to 60 ° C. by the heater 102. It is cleaned. When the washing | cleaning in it is complete | finished, it is pulled up from the up-and-down conveying mechanism 72, and is sent to the 2nd washing | cleaning chamber 200 by the front-back conveying mechanism 71, and similarly immersed in the washing | cleaning liquid tank 201, and ultrasonically washes. Thus, when the washing is finished, the object to be cleaned is pulled up and conveyed to the dehydration chamber 110 by the front and rear conveyance mechanism 71. Here, air is blown out from the air blow nozzle 113 provided up and down to the to-be-cleaned object, and a washing | cleaning liquid is removed. The air of this air blow nozzle 113 is also drawn in from the intake duct 112 provided in the washing | cleaning apparatus. In addition, this structure is one example, It does not matter even if the number and order of washing | cleaning chamber and dehydration chamber differ.

An exhaust chamber 10 and an exhaust chamber 12 are provided in the inlet 2 and the outlet 3 of the washing apparatus, respectively, and the exhaust chambers 10 and 12 are provided for exhausting to the outside of the washing apparatus 4. Exhaust ducts 501 and 502 are connected. Air volume adjustment damper mechanisms 251 and 252 are disposed in the middle of both of these exhaust ducts 501 and 502, respectively. The dampers 261 and 262 are provided inside each of the air volume adjustment damper mechanisms 251 and 252. Both of the exhaust ducts 501 and 502 join in the middle and open to the outside of the cleaning device 4, and an exhaust fan 51 serving as the exhaust means is provided therein.

Example  4

5 is a schematic configuration diagram showing a method of controlling the exhaust air volume of the exhaust means in the cleaning apparatus of the third embodiment.

Differential pressure gauges 11 and 13 are provided in the exhaust chamber 10 on the inlet port 2 side and the exhaust chamber 12 on the outlet port 3 side, respectively, to measure the atmospheric pressure between the atmospheric pressure and the atmospheric pressure difference in the exhaust chambers 10 and 12. do. The data measured by the differential pressure gauges 11 and 13 is transmitted to the control device 20, and the optimum air volume is calculated by the computing device 21 therein. The calculated optimum air volume data is sent to the inverter 22, and the inverter 22 controls the rotation speed of the exhaust fan 51 based on the data. The data of the optimum air volume is also sent to the servo control units 231 and 232 in the control device 20, so that both the servo control units 231 and 232 operate the servo motors 241 and 242 to exhaust the air ducts 501 and 502. Intake air volume is adjusted by adjusting the opening angles of the dampers 261 and 262 on (). At this time, the air pressure in the exhaust chamber 10 on the inlet 2 side and the exhaust chamber 12 on the outlet 3 side is controlled to be 5 Pa (or 2 Pa from 0.2 Pa) lower than 0.1 atmosphere atmospheric pressure.

Example  5

6A is a schematic configuration diagram of a washing apparatus incorporating a heat pump, which is a fourth embodiment of the present invention. The heat pump mechanism 600 of the cleaning apparatus of this embodiment includes a compressor 601 which is a compression means for compressing the vaporized heat medium, a condenser 602 which is a condensation means for applying condensation heat of the liquefied heat medium to the cleaning liquid, The expansion valve 603 which vaporizes a thermal medium, and the evaporator 604 which provides the heat medium in exhaust gas to a thermal medium are connected in this order, and are comprised.

The heat medium compressed in the compressor 601 is pumped to the condenser 602. The cleaning liquid of the cleaning liquid tank 101 is fed to the condenser 602 by the circulation pump 605, heated by the heat of condensation of the heat medium, and returned to the cleaning liquid tank 101. The heat medium via the condenser 602 is vaporized through the expansion valve 603, and then reaches the evaporator 604, absorbs heat from the exhaust and is compressed again by the compressor 601. The exhaust air blown from the exhaust fan 51 to the evaporator 604 is discharged out of the washing apparatus by applying heat to the heat medium in the evaporator 604.

In the washing apparatus of this embodiment, the heat energy (mainly evaporation heat of the washing liquid) that has been scattered outside the apparatus together with the exhaust gas is recovered by the evaporator 604 of the heat pump mechanism 600, and can be reused for heating the washing liquid. As the evaporation of the cleaning liquid increases, the thermal energy recovered from the exhaust also increases, so that a good thermal efficiency system can be constructed. Therefore, it is possible to reduce the operation rate of the heater 102 that has been used for heating the cleaning liquid until now, and energy saving can be achieved as the whole cleaning apparatus.

On the other hand, as shown in FIG. 6B, the washing | cleaning liquid from the condenser 602 can also be used by turning to the some washing | cleaning liquid tank 101,109. As a result, the recovered heat can be used more efficiently.

And as shown in FIG. 6C, when three or more washing liquid tanks are provided in series, you may circulate between each washing liquid tank so that a washing liquid can be used as a medium of heat exchange with the following path | route. For example, first, the cleaning liquid is fed to the heat pump mechanism 600 from the cleaning liquid tank 101 disposed on the inlet 2 side. As a result, the cleaning liquid is heated by heat exchange in the heat pump mechanism 600. The washing liquid heated in this way is transferred to the heat exchanger 106 provided in the final washing liquid tank 109 arranged on the outlet 3 side, and the washing liquid accumulated in the final washing liquid tank 109 is heated by the heat. The cleaning liquid, which is a thermal medium, is then passed through the intermediate cleaning liquid tank 108 sandwiched between the cleaning tank 101 on the inlet 2 side and the final cleaning liquid tank 109 on the outlet 3 side. It is returned to the tank 101. In this way, by heating only the cleaning liquids of the cleaning liquid tank 101 and the final cleaning liquid tank 109 at both ends, the cleaning liquid of the intermediate cleaning liquid tank 108 sandwiched therebetween becomes difficult to cool. As a result, it is easy to keep the temperature of all the washing liquid tanks constant, or the recovered heat can be used more efficiently. On the other hand, this configuration is one example, and the heat exchanger 106 provided with the cleaning liquid from the final cleaning liquid tank 109 on the outlet 3 side to the heat pump 600 and installed in the cleaning liquid tank 101 on the inlet 2 side. ) May be returned to the original final cleaning liquid tank 109 via a), and the number or order of the cleaning chamber, the heat exchanger, and the dehydration chamber may be different. In addition, the case where three or more washing liquid tanks are provided in series here means only that arrangement | positioning of a washing liquid tank is in series.

In addition, this embodiment can be combined with the structure of Example 3 from Example 1 mentioned above. In the above embodiment, the effect of reducing the amount of heat energy dissipated from the washer is obtained by optimizing the amount of exhaust air, but since the required amount of exhaust must be performed, the dissipation of heat accompanying it is inevitable. Thus, by combining this embodiment, it becomes possible to recover heat from exhaust, and further energy saving can be performed.

On the other hand, the expansion valve 603 constituting the heat pump mechanism 600 may be replaced by a capillary tube. In particular, in the case of a small heat pump, the heat pump control can be simplified by using the capillary tube, and the cost can be reduced.

On the other hand, when the expansion valve 603 is used, it is possible to control according to the heat load situation, which is suitable for a relatively large system.

Example  6

7 is a schematic structural diagram of another heat pump as a fifth embodiment of the present invention.

The heat pump mechanism 600 of the present embodiment includes a compressor 601 which is a compression means for compressing the vaporized heat medium, a condenser 602 which is a condensation means for applying condensation heat of the liquefied heat medium to the cleaning liquid, and an exhaust heat exchanger. 606, the expansion valve 603 which vaporizes a heat medium, and the evaporator 604 which gives heat of exhaust gas to a heat medium are connected in this order, and are comprised. In the exhaust heat exchanger 606, a cooling fan 607 as the exhaust heat exchanger cooling means is provided adjacent thereto, and the exhaust heat exchanger 606 is air cooled. Then, a temperature sensor (T) 608 is provided as a means for measuring the water supply temperature of the cleaning liquid supplied to the condenser 602. On the other hand, the expansion valve 603 may be replaced by a capillary tube.

The compressor 601 and the cooling fan 607 are controlled by the heat pump controller 609 based on the measurement data of the temperature sensor T 608. The following four control temperature setting values are stored in the heat pump controller 609 as operation control conditions of the compressor 601 and the cooling fan 607.

  Compression means operation start temperature T1

  · Exhaust heat exchanger cooling means intermittent operation stop temperature T2

  · Exhaust heat exchanger cooling means intermittent operation start temperature T3

  · Exhaust heat exchanger cooling means continuous operation start temperature T4

These T1-T4 are compared with the temperature T of the washing | cleaning liquid supplied to a condenser, and operation control of the compressor 601 and the cooling fan 607 is performed on the following conditions.

  When T <T1, the compressor (compression means) is stopped.

  The compressor (compression means) is operated when T1?

  The cooling fan (exhaust heat exchanger cooling means) is intermittently operated when T3≤T <T4.

  When T4≤T, the cooling fan (exhaust heat exchanger cooling means) is continuously operated.

  • The cooling fan (exhaust heat exchanger cooling means) is stopped when T <T2 is reached after the cooling fan (exhaust heat exchanger cooling means) starts operation.

In this embodiment, the compressor and the cooling fan are controlled based on the water supply temperature T of the cleaning liquid.

The compressor is stopped at a temperature at which the water supply temperature T is lower than T1 in order to prevent the heat medium temperature from becoming too low and freezing the pipes. And when T becomes T1 or more, operation | movement of a compressor is started and heat recovery from exhaust is performed. Then, when T reaches the temperature range of T3 or more and less than T4, since the amount of heat of exhaust gas is anticipated to heat too much the temperature of a washing | cleaning liquid, an intercooling fan is run and the temperature of a thermal medium is lowered by an exhaust heat exchanger. . Here, the intermittent operation means alternating operation of one second operation, one second stop, or the like. Moreover, it can also control by operating at low speed using an inverter instead of intermittent operation.

When the water supply temperature T becomes equal to or higher than T4, the temperature rise of the thermal medium is prevented by continuously operating or cooling the cooling fan. If the cooling fan is not operated when T is equal to or larger than T3 or T4, the temperature of the heat medium rises, and the washing liquid temperature exceeds the preferable temperature range. By performing such control, heating of the washing | cleaning liquid by a heat pump can be performed stably.

In the intermittent operation of this cooling fan (exhaust heat exchanger cooling means), the operation ratio of the fan is changed.

  {(T-T3) / (T4-T3)｝ × 100%

It is preferable to set it as.

For example, when T = 53 ° C, T3 = 52 ° C, and T4 = 55 ° C, the operating ratio of the fan is

  (53-52) / (55-52) x 100% = 33%

That is, it is preferable to set it to 0.67 second operation and 1.33 second stop.

Or without running intermittent operation, the rotation speed R of the fan,

   R = 0 when T <T3

   When T3≤T <T4, R = (T-T3) / (T4-T3) x A x R0

   When T4≤T, R = A × R0

(However, A may be a coefficient determined corresponding to the cooling area of the fan, and a value of 0.1 to 1.0. R0 may be the rated rotational speed of the fan.). This is stable as a system, and it has the effect of extending the life of a fan and a motor, and reducing noise at the time of operation.

When said set temperature T1-T4 set the reference use temperature of the aqueous washing | cleaning liquid of a washing | cleaning apparatus as TW degreeC,

  (TW-45) ° C≤T1≤ (TW-5) ° C

  (TW-10) ° C≤T2≤TW ° C

  (TW-5) ° C≤T3≤ (TW + 5) ° C

  TW ℃ ≤T4≤ (TW + 10) ℃

  0 ° C <T1 <T2 <T3 <T4

If it is set to, the washing apparatus can be stably controlled.

More preferably, for T1,

  (TW-20) ° C≤T1≤ (TW-5) ° C

Set to.

For example, when the reference operating temperature TW of the aqueous cleaning liquid of the washing apparatus is set to 55 ° C,

  10 ℃ ≤T1≤50 ℃

  45 ℃ ≤T2≤55 ℃

  50 ℃ ≤T3≤60 ℃

  55 ℃ ≤T4≤65 ℃

More preferably

  35 ℃ ≤T1≤50 ℃

  45 ℃ ≤T2≤55 ℃

  50 ℃ ≤T3≤60 ℃

  55 ℃ ≤T4≤65 ℃

Set to.

Claims (27)

a) conveying means for conveying the object to be cleaned; b) a spray nozzle which sprays and washes the aqueous cleaning liquid heated to the object to be cleaned; c) an air blow nozzle which sucks air inside the cleaning apparatus and blows off the water attached to the object to be cleaned; d) exhaust means for evacuating air, including water vapor inside the scrubber; e) barometric pressure differential measuring means for measuring a pressure difference between the atmospheric pressure of the outside air and the pressure of the exhaust chamber; and f) controlling means for controlling the exhaust air volume of the exhaust means based on the atmospheric pressure difference data measured by the pressure difference measurement means. The cleaning apparatus using an aqueous cleaning liquid according to claim 1, wherein said exhaust means exhausts from an exhaust chamber provided in the object to be cleaned of the cleaning apparatus. The washing apparatus according to claim 1 or 2, wherein the conveying means is a net conveyor, and spray nozzles and air blow nozzles are provided above and below the net conveyor. The cleaning apparatus using an aqueous cleaning liquid according to any one of claims 1 to 3, wherein a plurality of cleaning chambers provided with spray nozzles and a dehydration chamber provided with air blow nozzles are respectively provided. The cleaning apparatus using an aqueous cleaning liquid according to any one of claims 1 to 4, wherein the control of the exhaust air volume is performed by the rotation speed of the exhaust fan. The cleaning apparatus using an aqueous cleaning liquid according to any one of claims 1 to 4, wherein the control of the exhaust air volume is performed by an opening angle of a damper provided in the exhaust passage. The cleaning apparatus using an aqueous cleaning liquid according to any one of claims 1 to 6, wherein the control means controls the exhaust air volume of the exhaust means so that the air pressure in the exhaust chamber is 0.1 to 5 Pa lower than the atmospheric pressure. . The cleaning device using an aqueous cleaning liquid according to any one of claims 1 to 6, wherein the control means controls the exhaust air volume of the exhaust means so that the air pressure in the exhaust chamber is 0.2 to 2Pa lower than the atmospheric pressure of the outside air. . a) conveying means for conveying the object to be cleaned up and down and back and forth, b) a cleaning liquid tank having a heater and an ultrasonic generator for holding an aqueous cleaning liquid; c) an air blow nozzle which sucks air inside the cleaning apparatus and blows off the water attached to the object to be cleaned; d) exhaust means for evacuating air, including water vapor inside the scrubber; e) barometric pressure differential measuring means for measuring a pressure difference between the atmospheric pressure of the outside air and the pressure of the exhaust chamber; and f) controlling means for controlling the exhaust air volume of the exhaust means based on the atmospheric pressure difference data measured by the pressure difference measurement means. The cleaning apparatus using an aqueous cleaning liquid according to claim 9, wherein said exhaust means exhausts from an exhaust chamber provided in the object to be cleaned of the cleaning apparatus. The cleaning device using an aqueous cleaning liquid according to claim 9 or 10, wherein said exhaust means exhausts from an exhaust chamber provided in the object to be cleaned of the cleaning device. The cleaning device using an aqueous cleaning liquid according to any one of claims 9 to 11, wherein the control of the exhaust air volume is performed by the rotation speed of the exhaust fan. The cleaning apparatus according to any one of claims 9 to 11, wherein the control of the exhaust air volume is performed by an opening angle of a damper provided in the exhaust passage. The cleaning device using an aqueous cleaning liquid according to any one of claims 9 to 13, wherein the control means controls the exhaust air volume of the exhaust means so that the air pressure in the exhaust chamber is 0.1 to 5 Pa lower than the atmospheric pressure. . The cleaning apparatus using an aqueous cleaning liquid according to any one of claims 9 to 13, wherein the control means controls the exhaust air volume of the exhaust means so that the air pressure in the exhaust chamber is 0.2 to 2 Pa lower than the atmospheric pressure of the outside air. . The cleaning apparatus using an aqueous cleaning liquid according to any one of claims 1 to 15, wherein the exhaust means includes a heat pump mechanism for recovering heat of exhaust gas into the cleaning liquid. a) conveying means for conveying the object to be cleaned; b) a cleaning liquid tank for holding an aqueous cleaning liquid, c) cleaning means for cleaning the object to be cleaned with a heated aqueous cleaning liquid; d) exhaust means for evacuating air, including water vapor inside the scrubber; e) A washing apparatus using an aqueous washing liquid, comprising a heat pump mechanism for recovering heat of exhaust gas into the washing liquid. The method of claim 16 or 17, wherein the heater pump mechanism, a) an evaporator installed in the exhaust means for providing heat to the heat medium in the exhaust, b) compression means for compressing and liquefying the vaporized thermal medium; c) condensing means for imparting heat of condensation of the liquefied heat medium to the cleaning liquid; d) A washing apparatus using an aqueous washing liquid, comprising an expansion valve or a capillary tube for vaporizing the heat medium. The method of claim 18, a) two or more tanks holding the cleaning liquid are provided; b) a heat exchanger is installed in at least one of the cleaning liquid tanks, while no heat exchanger is provided in the other cleaning liquid tanks, and the cleaning liquid is fed to the heat pump mechanism from the cleaning liquid tank in which the heat exchanger is not installed. A washing apparatus using an aqueous washing liquid, characterized in that a washing liquid circulation mechanism is provided for returning the heated washing liquid to an original washing liquid tank via a heat exchanger of a washing liquid tank provided with a heat exchanger. The method of claim 19, a) three or more cleaning liquid tanks are installed in series; b) A heat exchanger is installed in the cleaning liquid tank disposed at one end of the cleaning liquid tanks, while a heat exchanger is not installed in the cleaning liquid tank disposed at the other end, and the cleaning liquid is transferred from the cleaning liquid tank disposed at the other end. And a washing liquid circulation mechanism for feeding liquid to the apparatus and returning the washing liquid heated by the heat pump mechanism to the original washing liquid tank via the heat exchanger of the washing liquid tank provided with the heat exchanger. The method according to any one of claims 18 to 20, wherein between the condensing means and the expansion valve or capillary tube, a) with exhaust heat exchanger, b) exhaust heat exchanger cooling means for cooling the exhaust heat exchanger; c) temperature measuring means for measuring the temperature of the washing liquid flowing through the condensing means; and d) a heat pump control means for controlling the compression means and the exhaust heat exchanger cooling means corresponding to the measured cleaning liquid temperature. The method of claim 21, wherein the heat pump control means, a) temperature storage means for storing the next set temperatures T1 to T4;   Compression means operation start temperature T1   · Exhaust heat exchanger cooling means intermittent operation stop temperature T2   · Exhaust heat exchanger cooling means intermittent operation start temperature T3   · Exhaust heat exchanger cooling means continuous operation start temperature T4 b) comparing the temperature T of the cleaning liquid measured by the temperature measuring means with these set temperatures T1 to T4,   Stops the compression means when T <T1;   Driving the compression means when T1≤T,   When T3≤T <T4, the exhaust heat exchanger cooling means is intermittently operated,   When T4≤T, the exhaust heat exchanger cooling means is continuously operated,   Stop the exhaust heat exchanger cooling means when T &lt; T2 after the exhaust heat exchanger cooling means starts operation. A washing apparatus using an aqueous washing liquid, comprising an operation control means. The set temperature T1 to T4 stored in the temperature storage means when the reference use temperature of the aqueous cleaning liquid of the washing apparatus is TW 占   (TW-45) ° C≤T1≤ (TW-5) ° C   (TW-10) ° C≤T2≤TW ° C   (TW-5) ° C≤T3≤ (TW + 5) ° C   TW ° C≤T4≤ (TW + 10) ° C   0 ° C <T1 <T2 <T3 <T4 The washing | cleaning apparatus using the aqueous washing | cleaning liquid characterized by the above-mentioned. The set temperature T1 to T4 stored in the temperature storage means when the reference use temperature of the aqueous cleaning liquid of the washing apparatus is TW 占   (TW-20) ° C≤T1≤ (TW-5) ° C   (TW-10) ° C≤T2≤TW ° C   (TW-5) ° C≤T3≤ (TW + 5) ° C   TW ° C≤T4≤ (TW + 10) ° C   0 ° C <T1 <T2 <T3 <T4 The washing | cleaning apparatus using the aqueous washing | cleaning liquid characterized by the above-mentioned. The operating ratio of the exhaust heat exchanger cooling means according to any one of claims 22 to 24, wherein the operation control means controls the operation ratio of the exhaust heat exchanger cooling means in the intermittent operation of the exhaust heat exchanger cooling means.   ｛(T-T3) / (T4-T3)｝ × 100% The washing | cleaning apparatus using the aqueous washing | cleaning liquid characterized by the above-mentioned. The exhaust heat exchanger cooling means is a fan, and the operation control means measures the rotational speed R of the fan.   R = 0 when T <T3   When T3≤T <T4, R = (T-T3) / (T4-T3) x A x R0   When T4≤T, R = A × R0 (However, A is a coefficient determined corresponding to the cooling area of the fan, and a value of 0.1 to 1.0. R0 is the rated rotational speed of the fan.) A washing apparatus using an aqueous cleaning liquid, characterized in that the control. 27. The cleaning method according to any one of claims 22 to 26, wherein the compression means uses a motor, and the operation control means controls the rotation speed of the motor continuously or stepwise. Device.

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