JPH0894283A - Plate type heat exchanger - Google Patents

Abstract

PURPOSE: To provide a plate type heat exchanger in which the lower part of a medium exit/entrance port of a lower side is reinforced by a rib without raising the position of the exit/entrance port to improve its pressure resistance, the entire height is low, the weight is hardly changed, and maintenance work such as transporting, disassembling and reassembling can be facilitated. CONSTITUTION: A plate type heat exchanger comprises ribs 8 for reinforcing frames 1a, 2, and a base plate 11 of an integral structure in which both right and left sides are continuously mounted at the lower end of a fixed side frame 1a having medium exit/entrance ports 5, 6.

Description

Detailed Description of the Invention

[0001]

[Industrial field of use] In recent years, since the living space is enlarged, the space of the machine room is narrowed, and the size of machinery installed inside is required to be as small as possible.
In addition, the pressure of water for air conditioning circulating inside the building has become high due to the height of the building. The present invention relates to a plate heat exchanger suitable for installation in such a building, and more particularly to an improved structure of a base plate of a fixing frame for reducing the height dimension of the heat exchanger. Is.

[0002]

2. Description of the Related Art In this type of plate heat exchanger, it is necessary to have a strength enough to withstand the pressure of the medium. Especially in a large-sized plate heat exchanger for high pressure, it is important to secure the strength of the frame.

Conventionally, as an example of securing strength, as shown in FIG. 2B, tightening bolts 7 on both sides for tightening between a fixed frame 1 and a movable frame (not shown).
In addition, tightening bolts 7a and 7b may be provided at the upper and lower ends. In addition, for the same purpose, as shown in FIG. 2A, a fixed frame 1 and a movable frame (not shown).
The ribs 8 may be provided on and to reinforce. Further, there is a method of increasing the plate thickness of the frame.

[0004]

In the conventional method of FIG. 2B, when the plate type heat exchanger is installed or disassembled at the installation location, the tightening bolts 7a at the upper and lower end portions are tightened or disassembled.
7b is difficult to handle, and the cost is increased due to an increase in the number of bolts. Further, in the method of FIG. 2A, it is necessary to provide a rib 8a on the fixed side frame 1 between the lower portion of the medium entrance / exit 6 on the lower side and the base plate 4 to reinforce, and a mounting space for this rib 8a. In order to ensure the above, it is necessary to increase the position height H1 of the medium entrance / exit 6 on the lower side, and the height H of the entire heat exchanger becomes high, which may make installation difficult at the installation location. Further, when the plate thickness of the frame is increased, weight increase and material cost increase, and it becomes difficult to handle the plate heat exchanger. The base plate 4 for stationary installation of the conventional plate heat exchanger has been attached to the frame at a required position of the foundation bolt, for example, divided into left and right sides.

An object of the present invention is to solve the above problems of the prior art and to improve pressure resistance by reinforcing the lower part of the lower medium entrance / exit with ribs without raising the position of the lower media entrance / exit. The overall height is low and the weight is almost unchanged,
It is an object of the present invention to provide a plate heat exchanger that can easily perform maintenance work such as transportation, disassembly, and reassembly.

[0006]

In order to achieve the above object, the present invention relates to a plate type heat exchanger in which a frame is reinforced by ribs, and an integrated structure in which the left and right sides are continuous to the lower end of a fixed side frame having a medium inlet / outlet port. It has a base plate attached.

[0007]

According to the present invention having the above structure, the base plate having an integral structure plays a role of a rib for reinforcing the lower part of the lower medium entrance / exit, so that the space between the lower part of the conventional lower media entrance / exit and the base plate is reduced. The rib that had to be installed in the can be omitted. Therefore, without increasing the height of the medium entrance / exit on the lower side, the lower part of the medium entrance / exit on the lower side is reinforced with ribs to improve pressure resistance, and the overall height is low,
The weight is almost unchanged, and the number of tightening bolts used is not increased. As a result, maintenance work such as transportation, disassembly, and reassembly can be easily performed.

[0008]

1 (A) and 1 (B) are a front view and a side view of a plate heat exchanger showing an embodiment of the present invention. In the figure, 1a is a fixed side frame, 2 is a moving side frame, 3
Is a heat transfer plate, 5 is an upper medium inlet / outlet, 6 is a lower medium inlet / outlet, 7 is a tightening bolt, 8 is a rib, 9 is a rear pillar, 10 is an upper guide bar, 11 is a base plate, 12 is a lower part. The guide bar 13 indicates a tightening nut.

The heat transfer plate 3 has upper and lower guide bars 10 and 1 between the fixed side frame 1a and the movable side frame 2.
2 is guided and supported by 2 to be laminated, and tightened at multiple points on both left and right sides with tightening bolts 7 and tightening nuts 13,
The heat exchange medium flow paths are alternately formed between the heat transfer plates 3 and 3.

A total of four medium inlets and outlets 5 and 6 are formed above and below the fixed-side frame 1a, and a plurality of medium inlets and outlets 5 and 6 are formed on the fixed-side frame 1a at equal or appropriate intervals. The ribs 8 are provided (the drawing shows three cases), and one rib 8 is provided above the medium inlet / outlet 5 on the upper side. Then, a base plate 11 having a continuous structure on the left and right sides is attached to the lower end of the stationary frame 1a, and this base plate 11 also serves as a reinforcing rib in the lower part of the medium entrance / exit 6 on the lower side.

The movable side frame 2 has a fixed side frame 1
Although a rib similar to that of the fixed frame 1a is provided, a medium entrance / outlet unlike the fixed side frame 1a is not provided. Therefore, the rib installation interval is not limited to that of the fixed side frame 1a, and the upper and lower guide bars 10 in FIG. , 12 at appropriate intervals.

The structure of the plate heat exchanger according to the embodiment of the present invention is as described above.
One of the media to be heat-exchanged with each other, for example, flows in from one (left) of the medium inlet / outlet 5 on the upper side of the fixed-side frame 1a, passes through one flow path between the heat transfer plates 3 and 3, and is on the lower side. Of the medium inlet / outlet 6 of the fixed side frame 1a, the other medium flows in from the other (right) of the medium inlet / outlet 6 on the lower side of the stationary frame 1a, and the other flow path between the heat transfer plates 3 and 3 is It flows out from the other (right) of the medium entrance / exit 5 on the upper side. Flow paths of media to be mutually heat-exchanged are alternately formed between the heat transfer plates 3 and 3, and heat is exchanged via the heat transfer plate 3 while passing through the respective flow paths.

High pressure acts on each of the heat transfer plates 3, 3 and between the fixed side frame 1a and the movable side frame 2 by allowing each medium to flow at high pressure through the flow paths of the mediums to be heat-exchanged with each other. , This is received by the tightening bolts 7 and the tightening nuts 13 on both sides. In this case, the fixed frame 1a and the movable frame 2 are formed with the ribs 8, respectively, so that they resist the high pressure and are prevented from being deformed, thereby preventing the leakage of the medium. Particularly, since the base plate 11 having a continuous structure on both left and right sides is attached to the lower end of the stationary frame 1a, the base plate 11 can also serve as a reinforcing rib in the lower portion of the lower medium entrance / exit 6. . Therefore, the space for providing the reinforcing rib between the lower part of the medium entrance / exit 6 on the lower side and the lower end of the fixed side frame 1a can be omitted, and the height can be reduced accordingly.

[0014]

According to the present invention, the lower part of the medium entrance / exit on the lower side is reinforced by ribs without increasing the height of the media entrance / exit on the lower side to improve the pressure resistance, and the overall height is low. It is possible to provide a plate heat exchanger that does not increase the number of tightening bolts used, has almost no change in weight, and can easily perform maintenance work such as transportation, disassembly, and reassembly.

[Brief description of drawings]

1A and 1B are a front view and a side view of a plate heat exchanger showing an embodiment of the present invention.

2A and 2B are front views of a plate heat exchanger showing two conventional examples.

[Explanation of symbols]

 1a Fixed side frame 2 Moving side frame 3 Heat transfer plate 5 Medium inlet / outlet 6 on the upper side 6 Medium inlet / outlet on the lower side 7 Tightening bolt 8 Rib 11 Base plate

Claims (1)

[Claims] 1. A plate heat exchanger in which a frame is reinforced by ribs, wherein a fixed-side frame having a medium inlet / outlet is provided with a base plate having an integral structure continuous on both left and right sides, and is attached to the lower end. vessel.