JPS63248486A - Spray washer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a spray cleaning device, in particular, a method that uses a low boiling point solvent such as fluorocarbon as a cleaning liquid and sprays it onto an object to be cleaned under pressure to remove dirt. The present invention relates to a spray cleaning device suitable for use in removing.

[Conventional technology]

Conventional equipment that performs cleaning by spraying cleaning liquid under pressure onto the object to be cleaned generally has a spray chamber in which a spray nozzle is placed and a drying chamber in which a heater is installed adjacent to each other. It consists of a total of four chambers arranged in series, with a front chamber and a rear chamber provided to prevent steam from leaking outside the system. Further, a conveyor is provided to convey the object to be cleaned through each chamber, and the object to be cleaned is sequentially carried into each chamber by driving the conveyor.

By the way, in this type of equipment, a low boiling point solvent such as Freon 113 is used as a spray cleaning liquid, but in this case, if air is present in the spray chamber, it will easily vaporize, and the heat of vaporization will be taken away from the object to be cleaned. There was a problem in that the temperature was lowered and moisture in the air condensed on the object to be cleaned.

For these reasons, the applicant has proposed a new spray cleaning device that can improve the drying effect by improving the problems associated with dew condensation, and also improve the recovery rate of cleaning fluid.

As shown in FIG. 3, this device includes a spray tank 10 serving as a cleaning chamber in the center of the main body.2. A cleaning liquid (
(Freon) is injected. Spray tank 10
A liquid receiving tank 16 is connected to the lower part of the spray tank 10 to store a certain amount of cleaning liquid and to receive the cleaning liquid flowing down from the spray tank 10. The cleaning liquid in the liquid receiving tank 16 is a pre-filter 1B.

It is pressurized and supplied to the spray nozzle 12 via the pump 20 and filter 22, and is sprayed from the nozzle 12.

Note that a cooling coil 24 is provided in the liquid receiving tank 16 to liquefy the fluorocarbon.

A steam generation tank 26 as steam generation means is provided adjacent to the liquid receiving tank 16. This steam generation tank 26 contains a part of the cleaning liquid, and is heated by an internal electric heater 28 to evaporate the cleaning liquid. A duct 30 is provided to connect the tank 26 and the spray tank 10, and the duct 30 can be fed through a vent hole 32 provided on the side of the spray tank 10 to fill the spray tank 10 with fluorocarbon vapor. .

Further, an introduction cylinder part 34 for introducing the object to be cleaned 14 is integrally provided on the upper surface of the spray tank 10, and the object to be cleaned 14 is lowered from the upper end inlet opening 36 of the introduction cylinder part 34. and move it to a position facing the spray nozzle 12. A cooling coil 38 is arranged on the inner wall surface of the introduction tube 34 so as not to obstruct the vertical movement of the object 14 to be cleaned, and the interface position of the fluorocarbon vapor filling the spray tank 10 is adjusted to the opening position of the spray tank 10 itself. Steam cooling is performed to prevent steam leakage. A sliding door 40 is provided at the upper end entrance opening 36 of the introduction cylinder 34.
is provided, and is opened and closed only when the object to be cleaned 14 is taken in and out, so that the interior of the spray tank 10 including the introduction cylinder part 34 becomes a sealed space.

In an apparatus having such a configuration, by supplying the cleaning liquid vapor from the cool air generation tank 26, there is no air condensation on the surface of the object to be cleaned 14 because there is no air in the spray tank IO, and by constantly supplying steam, the spray The subsequent object to be cleaned 14 is heated and dried in a short time.Therefore, an advantage is obtained that cleaning and drying can be performed within the spray tank IO.

[Problem that the invention seeks to solve]

However, in the above-mentioned improved apparatus, the cleaning liquid is sprayed in a steam atmosphere, so its temperature easily rises. In particular, when Freon 113 is used as a cleaning liquid, if the temperature of the liquid exceeds 30°C, cavitation will occur in the spray pump 20 and the pump 20 will not be able to perform its full function, so the cleaning liquid will always be kept below 30°C. Therefore, it is necessary to cool the liquid using the cooling coil 24 in the liquid receiving tank 16. The amount of cooling heat depends on the amount of heating by the electric heater '28 in the steam generation tank 26. In this device, an electric heater 28 is used as a heating source for the steam generating tank 26, and measures such as passing cold water through a cooling coil 24 are taken to cool the liquid receiving tank 16, and heating and cooling are They each worked independently. Therefore, although such a device has good recovery performance of the spray liquid, there is a problem in that a large amount of energy is required for heating and cooling the liquid, resulting in high running costs.

The purpose of the present invention is to focus on the above-mentioned conventional problems, and while taking advantage of the high drying effect when using a low boiling point solvent such as Freon as a cleaning liquid and the ability to make equipment compact, the present invention aims to reduce heating and cooling of the cleaning liquid. The purpose of this project is to provide spray cleaning equipment that saves energy.

(Means for Solving the Problems) In order to achieve the above object, the spray cleaning device according to the present invention has a built-in spray means for pressurized spraying of a cleaning liquid, and a nearly hermetically sealed device into which the object to be cleaned can be carried. a spray tank; a steam generating tank that is attached to the spray tank and supplies steam obtained by heating the cleaning liquid to the spray tank through a ventilation passage; and a liquid receiving tank that receives and cools the spray liquid from the spray tank. and a heat pump having at least a condenser and an evaporator, and the condenser of the heat pump serves as heating means for the 1-air generation tank. The evaporator of the heat pump is used as a cooling means for the liquid receiving tank.

[For production]

With the above configuration, the heat of the cleaning liquid heated by spraying can be recovered from the liquid receiving tank by the steamer of the heat pump, and can be reused as a heating source through the condenser of the heat pump provided in the steam generating tank. This makes it possible to create a spray cleaning device that incorporates an energy-saving heat recovery system.

〔Example〕

EMBODIMENT OF THE INVENTION Below, the Example of the spray cleaning apparatus based on this invention is described in detail with reference to drawings. It should be noted that the same members as those of the apparatus shown in FIG. 3 are given the same numbers and their explanations will be omitted.

FIG. 1 shows a sectional view of a spray cleaning device according to an embodiment. The main body of the cleaning device includes a spray tank 10 with a built-in spray nozzle 12. Liquid receiving tank 16 located at the bottom of the tank
, the cleaning liquid in the steam generating tank 26 and liquid receiving tank 16, which are adjacent to the spray tank 10 and connected by a duct 30, is transferred to the spray nozzle 1.
It is composed of a pump 20 that pumps the water under pressure to the air pump 2.

In this main configuration, a heat pump 42 is disposed between the liquid receiving tank 16 and the steam generating tank 26 in this embodiment. This heat pump 42 has a compressor 44
, the condenser 46, the expansion valve 48, and the evaporator 50 are connected to the piping 5.
2 are connected in series, and the evaporator 50 is connected to the liquid receiving tank 1.
6, and the condenser 46 is connected to the steam generating tank 2.
It is placed immersed in the cleaning solution No. 6. As a result, the evaporator 50 of the heat pump 42 acts as a cleaning liquid cooling means, and the condenser 46 acts as a heating means.

Because of this configuration, the condenser 46 of the heat pump 42
The fluorocarbon as a cleaning liquid in the steam generation tank 26 heated by the heat of condensation evaporates at about 47° C., and the vapor fills the spray tank 10 through the duct 30 and the vent hole 32. When spray cleaning is started in this steam atmosphere, the fluorocarbon spray liquid is heated by the fluorocarbon vapor, so that the temperature of the fluorocarbon cleaning liquid stored in the liquid receiving tank 16 rises. At this time, since the evaporator 50 of the heat pump 42 is present in the liquid receiving tank 16, it absorbs heat from the fluorocarbon cleaning liquid in the liquid receiving tank 16 for cooling. The heat pump 42 is the compressor 4
4, the heat medium is fed to the condenser 46, and the steam generation tank 26
The heat of condensation heats the Freon liquid in the tank.

According to such an embodiment, a heat recovery system can be constructed between the heat source required for the steam generation tank 26 and the cooling source required for the liquid receiving tank 16 using the heat pump 42,
Energy saving can be achieved while effectively utilizing the correlation that the amount of cooling heat in step 6 depends on the amount of heating of the steam generation tank 26. As a result, compared to the case where heating and cooling are performed independently as in the example shown in FIG. 3, the power consumption can be reduced to about 176 or less, making it possible to achieve effective energy savings.

In addition, in FIG. 1, a container body 54 having a large space volume is provided on the upper surface of the spray tank 10, and this container body 54 has a carry-in side overhang 54A having a carry-in door 56 on the side, and a carry-in side overhang 54A having a carry-in door 56 on the side thereof. 58 is provided. Further, at a position below each of the projecting portions 54A and 54B, there is a carry-in conveyor 60 that conveys the object to be cleaned 14 to the bottom of the carry-in door 56, and a receiving conveyor 60 that transports the object to be cleaned 14 from the carry-out door 58 and takes it out of the system. An unloading conveyor 62 is installed for conveying. On the other hand, inside the container body 54, a conveying device 64 is provided, and a lifting arm 64 having a gripping tool 66 at its tip is provided. The lifting arm 68 guides the object 14 up and down, and guides the object 14 to be cleaned by repeatedly moving up and down and horizontally, as shown by the arrows in the figure, by means of a figure-8 guide machine 70 that horizontally guides the upper end of each lifting guide. let

The container body 54 is equipped with an environmental ventilation device, which blows air from a fan 72 into the interior of the container body 54 through a HEPA filter 74, and from a lower intake port through a duct 76 to the fan 7.
2 is configured to blow into the air.

Next, FIG. 2 shows a spray cleaning device according to a second embodiment. The heat pump 42 is also used as a cooling heat source for the cooling coil 38. That is, a three-way solenoid valve 78 is interposed between the condenser 46 and the expansion valve 48 of the heat pump 42, and a branch pipe 80 is connected to the second expansion valve 8 with respect to the cooling coil 38.
It is connected via 2. Further, the output side of the cooling coil 3 is connected to the input side of the heat pump compressor 44 via a bypass pipe 84 . Furthermore, the spray tank 10 and the introduction cylinder part 34
An opening/closing valve 186 is disposed between the lid 86 and the opening/closing valve 186, and is interlocked with the three-way solenoid valve 78 so that the branch pipe 80 is shut off when the lid 86 is closed, and conversely, the branch pipe 80 side is opened when the lid 86 is opened. ing.

Note that 88 in the figure is an auxiliary cooler provided on the outlet side of the compressor 44 of the heat pump 42.

In such a second embodiment, the recovered heat can also be used as a cooling heat source necessary to prevent freon vapor from leaking from the spray tank 10, and it is possible to improve the cleaning liquid recovery rate while further saving energy. There are advantages that can be achieved.

〔Effect of the invention〕

As explained above, according to the present invention, at least the mutually related cooling heat source of the liquid receiving tank and heating source of the steam generating tank are incorporated into a heat recovery system using a heat pump, thereby reducing power consumption. It is possible to obtain a spray cleaning device that achieves a drying effect when a low boiling point solvent such as fluorocarbon is used as a cleaning liquid, and makes the equipment more compact, while reducing energy consumption and saving energy.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a spray cleaning device according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view of the same device according to a second embodiment, and FIG.
The figure is a sectional view of the advance spray cleaning device. 10--Spray tank, 12--Spray nozzle, 16--Liquid receiving tank, 20--Pump, 26--
Steam generation tank, 42...-71 pump, 46-... condenser, 50...-evaporator. Patent applicant Hitachi Plant Construction Co., Ltd. 1st is 10 varnish 7″ sea 11 42: Heat mener 1
2 Nisdereel 44. Pressure [/J16:Uke;/Z /It 46: ;Cane 142
0: 't'7' 48: MjM well 26:
fλ generation tank 50: 541st base Figure 2

Claims (1)

[Claims] (1) A nearly sealed spray tank that has a built-in spray means for pressurized spraying of a cleaning liquid and into which objects to be cleaned can be carried, and a spray tank attached to the spray tank that heats the cleaning liquid through a ventilation passage. The heat pump includes a steam generating tank that supplies steam to the spray tank, a liquid receiving tank that receives and cools the spray liquid from the spray tank, and a heat pump that has at least a condenser and an evaporator. A spray cleaning device characterized in that: is used as a heating means for the steam generating tank, and an evaporator of the heat pump is used as a cooling means for the liquid receiver.