JPH0614777U - Plate heat exchanger - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a new fixing means for the heat transfer plates 1 superposed on each other instead of the conventional reinforcing plate 8 of the plate heat exchanger,
An object is to provide a rational holding means for the multi-layered heat transfer plate 1. [Structure] Forming the same uneven surface as the heat transfer plate 1 of the plate heat exchanger, and fixing heat transfer plates 9 whose plate thickness is set to be larger than that of the heat transfer plate 1 are attached to both side surfaces to form a multilayer heat transfer. The plate 1 is sandwiched between fixing heat transfer plates 9.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a plate heat exchanger used in various chemical industries and heat appliances.

[0002]

[Prior art]

 With the development of the food industry such as dairy industry and fermentation industry, plate heat exchangers have been introduced as many heat exchangers that perform operations such as rapid heating, cooling, reheating and sterilization required by those industries. Due to its characteristics, it has spread rapidly, and recently it has come to be used in the general chemical industry and heat appliances. Such a plate heat exchanger forms a heat transfer plate with various corrugations and continuous uneven surfaces such as hemispherical shells formed by pressing, and stacks the heat transfer plates in multiple layers to form a heat transfer plate and a heat transfer plate. A fluid channel with a narrow interval is formed between the two, and two types of fluid such as liquid-liquid and liquid-gas are alternately passed through this channel for heat exchange.

A typical conventional plate heat exchanger is shown in FIGS. 2 and 3. Here, the corrugated heat transfer plates (1) are stacked in multiple layers, and alternating fluid channels (2A) and (2B) are formed between the heat transfer plates (1). The fluid inlet (3) and the fluid outlet (4) of the channel (2A) and the fluid inlet (5) and the fluid outlet (6) of the channel (2B) are formed at the four corners of the plate heat exchanger. Openings are formed at the four corners of each heat transfer plate (1) at positions corresponding to the inlets and outlets of these fluids, and these openings are joined to form inlet and outlet passages (7) for the fluid. The inlet / outlet passage (7) is configured to communicate with the fluid inlet / outlet, and different fluids are circulated from the inlet / outlet to the channels (2A) and (2B) for heat exchange. With such a configuration, the plate heat exchanger achieves high thermal efficiency by dramatically increasing the heat transfer area.

[0004]

[Problems to be solved by the device]

 In such a plate heat exchanger, conventionally, a reinforcing plate (8) having a large plate thickness is separately manufactured, and the heat transfer plates (1) that are attached to both side surfaces and are stacked in multiple layers are sandwiched and firmly fixed. Means have been adopted.

The present invention is intended to provide a new fixing means for superposed heat transfer plates (1) in place of the conventional reinforcing plate (8). The purpose of the above is to provide a rational clamping means of (1) and improve various functions of the plate heat exchanger.

[0006]

[Means for Solving the Problems]

 In order to achieve these objects, the plate heat exchanger of the present invention has the same concavo-convex surface as that of the heat transfer plate, and a fixing heat transfer plate whose plate thickness is set larger than that of the heat transfer plate is attached to both sides. It is provided by sandwiching a multi-layer heat transfer plate between fixing heat transfer plates. Examples of the drawings will be specifically described below.

[0007]

【Example】

 FIG. 1 shows an embodiment of the plate heat exchanger of the present invention, which is cut vertically to show a sectional state. The same reference numerals as those of the above-mentioned conventional example indicate the same structure, and the heat transfer plates (1) having corrugated uneven surfaces are superposed in multiple layers to form alternating fluid channels (2A) and (2B). The fluid inlet (3) and outlet (4) of the channel (2A) are formed. Then, a fixing heat transfer plate (9) having a corrugated surface having the same waveform as that of the heat transfer plate (1) and having a plate thickness set to be larger than that of the heat transfer plate (1) is attached to both side surfaces. The multilayer heat transfer plate (1) is sandwiched between the fixing heat transfer plates (9), firmly fixed by welding or other means, and airtightly joined.

[0008]

[Effect of device]

 The plate heat exchanger of the present invention is configured as described above, and instead of the conventional reinforcing plate (8), the same uneven surface as that of the heat transfer plate (1) is formed, and the plate thickness is changed to the heat transfer plate (1). The larger fixed heat transfer plate (9) is installed on both sides, and the fixed heat transfer plate (9) and the adjacent heat transfer plate (1) have fluid channels at both ends. The formed heat transfer plate (9) functions as a heat transfer plate and can be reasonably configured without waste.

Further, the plate thickness of the fixing heat transfer plate (9) is set to be larger than that of the heat transfer plate (1), and the fixing heat transfer plate (9) sandwiches the multilayer heat transfer plate (1) to firmly fix the heat transfer plate (1). It is possible to secure the same mechanical strength as the conventional reinforcing plate (8).

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of a plate heat exchanger of the present invention.

FIG. 2 is a cross-sectional view of a conventional plate heat exchanger.

FIG. 3 is a perspective view of a conventional plate heat exchanger.

[Explanation of symbols]

 1 Heat transfer plate 2A channel 2B channel 9 Fixing heat transfer plate

Claims (2)

[Scope of utility model registration request] 1. A heat transfer plate (1) having a continuous uneven surface.
Are stacked in multiple layers to form fluid channels (2A) and (2B) with a narrow space between the heat transfer plates (1), and two fluids are alternately provided in the channels (2A) and (2B). A plate-type heat exchanger that conducts heat exchange by circulating the heat transfer plate (1), which has the same uneven surface as the heat transfer plate (1) and whose plate thickness is set larger than that of the heat transfer plate (1) ( 9) is attached to both side surfaces, and a plate heat exchanger is configured by sandwiching the heat transfer plate (1) of a large amount between the heat transfer plates for fixation (9). 2. The plate heat exchanger according to claim 1, wherein the continuous uneven surface of the heat transfer plate (1) and the fixing heat transfer plate (9) are formed in a corrugated shape.