JPH053901Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a plate heat exchanger, particularly its heat insulating structure.

Conventional technology Multiple heat transfer plates are stacked together with gaskets interposed between the stand frame and the end frame.
Plate heat exchangers that form alternating flow paths for two types of heat exchange media are used in various industrial fields.

In the above-mentioned plate heat exchanger, steam, hot water, etc. are used as a heating medium for the liquid to be treated.
Also, brine, chilled water, etc. are used as a cooling medium. These heating or cooling media 1
The liquid to be treated 2 that is heated or cooled by heat exchange flows into each of the alternately arranged channels and exchanges heat by heating or cooling.

Problems to be Solved by the Invention In the above-mentioned plate heat exchanger, the number of alternate passages for the heat exchange medium is selected according to its heat exchange capacity. That is, depending on the heat exchange capacity of the heat exchanger, as shown in FIG. Either the flow path configuration should be selected as follows, or one of the above A or B should be
The flow path configuration is selected to increase the number of flow paths. When the flow path configuration illustrated in FIG. 2 is adopted in a conventional plate heat exchanger, the heat transfer plates 3s and 3E adjacent to the stand frame S and the end frame E are connected to the heating medium or cooling medium It is heated to a high temperature or cooled to a low temperature by the exchange of heat. In this case, the heat transfer plate 3s,
In order to reduce heat loss caused by heat radiation or heat absorption in 3E, and to prevent heat radiation to the surrounding environment, the stand frame S and end frame E can be made thicker and larger to increase their heat capacity. Countermeasures have been taken, such as surrounding the main body of the plate heat exchanger with a heat insulating material, but each method is disadvantageous in terms of cost. Furthermore, in terms of operability such as disassembly and inspection, considerable labor is required due to the heavy weight and the installation and removal of the heat insulating material.

The main objective of the present invention is to provide a solution to the problems observed in conventional plate heat exchangers, especially their insulation structure.

Means for Solving the Problems As a means for solving the above problems, the present invention is to stack a plurality of heat transfer plates between the stand frame and the end frame with gaskets in between so that two types of heat exchange media can flow alternately. In a plate heat exchanger formed by forming a passage, a heat transfer plate disposed adjacent to the inside of the stand frame and the end frame is a heat insulating plate, and first and last heat transfer plates are arranged at a predetermined distance from the heat insulating plate. The present invention provides a plate heat exchanger in which heat transfer plates are arranged facing each other and glass fibers or synthetic fibers are filled between the heat insulating plates and the first and final heat transfer plates to form a heat insulating layer.

Function In a heat exchanger formed by a stand frame and an end frame, and heat transfer plates laminated via a gasket, the heat transfer plate placed adjacent to the inside of the stand frame and end frame is Use as a heat insulating plate,
A first and final heat transfer plate is placed facing the heat insulating plate at a predetermined distance, and between the heat insulating plate and the first and final electric heating plate,
The heat loss of the plate heat exchanger is reduced by forming a heat insulating layer filled with glass fibers or synthetic fibers.

Embodiment FIG. 1 is a schematic sectional view of a plate heat exchanger showing a specific example of the present invention, and FIG. 1a is an exploded perspective view showing the specific example of FIG. 1.

In the plate type heat exchanger, a plurality of (1 to n) heat transfer plates P ₁ to _{P o} are stacked between a stand frame S and an end frame E with gaskets 4 interposed therebetween depending on the heat exchange capacity. Therefore, two types of heat exchange media, namely the heating medium or cooling medium 1 and the liquid to be treated 2, flow separately in alternate channels A and B.
It consists of Therefore, the above stand frame S
Insulating plates 11s and 11E are arranged inside the end frame E, and a first heat transfer plate _P1 and a final heat transfer plate P _o are placed at a predetermined distance from the heat insulating plates 11s and 11E. Place them facing each other. The heat insulating plate 11s and the first heat transfer plate thus formed
P ₁ and between the heat insulating plate 11E and the final heat transfer plate P _o , glass fibers or synthetic fibers 12 are filled to form heat insulating layers 13s and 13E.

Since the device of the present invention is constructed as described above,
A heating medium or a cooling medium 1 flowing through a flow path A,
When heat exchange is performed with the liquid to be treated 2 flowing through the flow path B, the heat insulating layers 13s and 13E block heat radiation or heat absorption, contributing to reducing heat loss and preventing heat radiation to the surrounding environment. do. In addition, the heat insulation plate 11
s, 11E is manufactured from a plate-like member having the same dimensions as the heat transfer plates P ₁ to _{P o} , so the heat transfer plates can be used as they are if necessary. Further, in this embodiment, the heat insulating layers 13s and 13E are provided on the stand frame S side and the end frame E side, respectively. A thermal insulation layer can be placed on either side.

Effects of the invention As can be understood from the above explanation, in a plate heat exchanger formed by heat transfer plates laminated via a stand frame, an end frame, and a gasket, the stand frame and end frame A heat transfer plate disposed adjacent to the inside is utilized as a heat insulating plate, and first and final heat transfer plates are disposed facing each other at a predetermined distance from the heat insulating plate, and the heat transfer plate and the first and final heat transfer plates By forming a heat insulating layer filled with glass fiber or synthetic fiber between the heat plate, the heat loss of the plate heat exchanger due to heat radiation or heat absorption is reduced, and the heat transfer to the surrounding environment is reduced. Dissipation can be controlled.
In addition, since the device of the present invention has an extremely simple structure, a heat exchange system with low heat loss can be constructed by only partially modifying a conventional plate heat exchanger.

The present invention reduces the weight of the stand frame and end frame, eliminates the need for heat insulating material, and reduces costs. At the same time, it has a remarkable effect on improving the operability of the plate heat exchanger.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of a plate heat exchanger showing a specific example of the present invention, and FIG. 1a is an exploded perspective view showing the specific example. FIG. 2 is a schematic cross-sectional view of a conventional plate heat exchanger. S... Stand frame, E... End frame, P ₁ , P ₂ ... P _o ... Heat transfer plate, 1... Heating medium or cooling medium, 2... Liquid to be treated, A,
B... Alternate flow path, 4... Gasket, 11s, 1
1E...Insulation plate, 12...Glass fiber or synthetic fiber, 13s, 13E...Insulation layer.

Claims (1)

[Scope of utility model registration request] In a plate heat exchanger in which a plurality of heat transfer plates are stacked between a stand frame and an end frame via gaskets to form alternating flow paths for two types of heat exchange media, the stand frame and A heat transfer plate disposed adjacent to the inside of the end frame is a heat insulating plate, and first and final heat transfer plates are arranged to face each other at a predetermined distance from the heat insulating plate, and the heat transfer plate and the first and final heat transfer plate are arranged opposite to each other at a predetermined distance. A plate heat exchanger characterized by having a heat insulating layer filled with glass fiber or synthetic fiber between the layers.