JPH04306495A - Washing device for plate type heat exchanger - Google Patents

Abstract

PURPOSE:To permit efficient washing of the heat transfer surfaces of the plates of a plate pack, consisting of a plurality of superposed plates, from the outside of the pack without dismantling it and eliminate the possibility of damaging of the plates upon working. CONSTITUTION:The title device is constituted so that an oscillator 16 is abutted against the end face 3a of a plate pack 3 to oscillate said oscillator 16 by a high-frequency wave generating means 15 into the direction of superposing of plates 11 and transfer the high-frequency oscillation to respective plates 11 to remove scales and the like adhered to the surfaces of the plates 11.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device for plate heat exchangers used in air conditioning systems and the like.

0002

[Prior Art] Generally, in this type of heat exchanger, a plate pack is constructed by stacking a plurality of metal corrugated plates forming independent heat transfer surfaces with an elastic gasket in between. It is held in place by bolts etc. between the head and follower that make up the frame.
The corrugated grooves between the plates create a turbulent flow of the heat exchange medium, such as hot water or cold water, to improve heat transfer performance.

0003

[Problems to be Solved by the Invention] By the way, in the above heat exchanger, scale and the like mixed in the heat exchange medium adhere to the surface (heat transfer surface) of the plate, and when this increases, the heat transfer performance deteriorates. It will bring. For this reason, conventionally, an operator periodically disassembles the plate pack and cleans each plate while brushing to remove scale. However, disassembling the plate pack for plate cleaning in this way is time-consuming and troublesome, and there is also the risk of inadvertently damaging the plates.

The present invention was made in view of the above circumstances, and provides a plate heat exchanger that can automatically clean the plates without requiring manual disassembly work and without damaging the plates. is intended to provide.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a plate pack that elastically contacts the end face of a plate pack formed by holding a plurality of plates in an overlapping state via an elastic gasket, and a vibrator configured to be slidable in the overlapping direction; and a high-frequency vibration generating means that slides and drives the vibrator in the overlapping direction to impart high-frequency vibration to each plate via the vibrator. It is equipped with the following.

[0006]

[Operation] According to the present invention, when the high-frequency vibration generating means is activated, the vibrator that is in elastic contact with the end face of the plate pack vibrates at high frequency in the stacking direction of the plates, and the vibration is transmitted to the plates. Therefore, scale attached to the plates can be effectively removed without disassembling the plate pack, and the plates will not be damaged due to vibration cleaning.

[0007]

Embodiments Hereinafter, embodiments of the present invention will be explained based on the drawings.

FIGS. 1 and 2 are a side view and a plan view, respectively, showing a cleaning device for a plate heat exchanger in an installed state according to an embodiment of the present invention.

In FIGS. 1 and 2, a plate heat exchanger 1 generally includes a frame 2, a plate pack 3 held by the frame 2, and a plurality of bolts 4 and nuts 5 for tightening the plate pack. Consisting of 6 is the head, 7
A follower 8 and 9 are respectively installed between the head 6 and the column 10 to sandwich the plate pack 3 from the front and rear directions between the head 6 and the follower 7.
It is a carrying bar and a guide bar that support the frame 2, and together with the head 6, follower 7, column 10, etc., constitutes the frame 2.

As shown in FIG. 4, the plate pack 3 is constructed by stacking a plurality of plates 11 made of, for example, thin stainless steel plates into a corrugated shape, with a rubber gasket 12 interposed between each plate 11. Each of the plates 11 forms an independent heat transfer surface. The above plate pack 3 is attached to the above head 6.
The head 6 and the follower 7 are sandwiched between the head 6 and the follower 7, and are attached to the frame 2 side by tightening the head 6 and the follower 7 with a tightening bolt 4 and a nut 5.

Reference numeral 13 denotes a cleaning device for the plate 11, and its main body 14 is attached to the tightening bolt 4 in the frame 2, as shown in FIG. Reference numeral 15 denotes an ultrasonic vibration generator fixed to the main body 14 as a high-frequency vibration generating means. 16 is in contact with one side end surface 3a of the plate pack 3, and in the overlapping direction of the plates 11 (
It is a vibrator configured to be able to reciprocate in the direction of arrow X),
It is connected to the vibration rod 15a of the ultrasonic vibration generator 15, so that vibrations when driven by the ultrasonic vibration generator 15 are applied to the plate pack 3. 17 is a patch plate disposed on the main body 14, 18
is interposed between the main surface of this backing plate 17 and the side surface of the vibrator 16, so that the vibrator 16 is connected to the end surface 3a of the plate pack 3.
It is a cushioning material that presses elastically against the surface, and rubber or leaf springs are used. Reference numeral 19 denotes a screw body attached to the main body 14 to adjust the contact pressure of the vibrator 16 to the plate pack 3.

In such a configuration, the vibration frequency of the ultrasonic vibration generator 15 is set to, for example, several KHz to 100 KH.
When the ultrasonic vibration generator 15 is operated with the ultrasonic vibration generator 15 set in the range of z, the vibrator 16 vibrates in the direction of the arrow X at the above frequency via the vibrating rod 15a. Since this vibrator 16 is in elastic contact with the end surface 3a of the plate pack 3, the ultrasonic vibration is transmitted to each plate 11 in the plate pack 3. That is, each plate 11 mentioned above
Since the plates 11 are only tightened together via the rubber gasket 13, each of the plates 11 will vibrate in the same direction and at the same frequency due to vibrations in the above frequency range. This ultrasonic vibration of the plates 11 causes a cavity phenomenon in the medium such as hot water or cold water flowing between the plates 11, and also produces an agitation effect, which removes scales attached to the surfaces of the plates 11. It will be torn off.

As a result, the plates 11 can be automatically cleaned without disassembling the plate pack 3, and the cleaning work is saved. Furthermore, since there is no need to disassemble the plate pack 3, the risk of accidentally damaging the plate 11 is eliminated.

Note that if the position of the backing plate 17 is varied by operating the screw body 19 and the contact pressure between the vibrator 16 and the plate pack 3 is finely adjusted using the cushioning material 18, each of the ultrasonic vibrations can be adjusted. The transmission efficiency to the plate 11 side can be increased.

By the way, in the above embodiment, the ultrasonic vibration generator 15 is used as the high-frequency vibration generating means, but if the plate 11 is given high-frequency vibrations, the ultrasonic vibration generator can be used. It is not limited to 15.

[0016]

As described above, according to the present invention, a vibrator that elastically contacts the end face of a plate pack made of a plurality of stacked plates is subjected to high-frequency vibration in the stacking direction by a high-frequency vibration generating means. Since this high frequency vibration is transmitted to each plate, it is possible to effectively remove scale etc. attached to the heat transfer surface of the plates without disassembling the plate pack.
The fear of damaging the plate during cleaning work can also be eliminated.

[Brief explanation of drawings]

FIG. 1 is a side view showing an installed state of a cleaning device for a plate heat exchanger according to an embodiment of the present invention.

FIG. 2 is a plan view showing the configuration of the cleaning device in a mounted state.

FIG. 3 is an enlarged top view showing the configuration of the cleaning device.

FIG. 4 is an explanatory diagram of a plate.

[Explanation of symbols]

3 Plate pack 3a End face 11 Plate 12 Elastic gasket 15 High frequency vibration generation means 16 Vibrator

Claims (1)

[Claims] [Claim 1] A vibrator configured to elastically contact the end face of a plate pack formed by holding a plurality of plates in a stacked state with an elastic gasket in between, and to be able to slide in the stacking direction. A cleaning device for a plate heat exchanger, comprising: a vibrator; and high-frequency vibration generating means for vibrating and driving the vibrator in the overlapping direction to apply high-frequency vibration to each plate via the vibrator.