JPS6354591A - Heat exchanger - Google Patents

Abstract

PURPOSE:To obtain a heat exchanger of compact construction and a high efficiency in a heat exchanger unit for an air conditioner by providing a heat exchanger which forms a heat transfer tube in a spiral shape at the air intake section on the inside of a centrifugal blower. CONSTITUTION:A heat exchanger unit 3 is received in the air intake section 11 of a centrifugal blower 2. This heat exchanger unit 3 is provided with a heating medium tube 5 which pierces upwards and downwards through disc shaped fins 4 stacked in many layers with an opening in the central section of each fin 4 in such a fashion as a twig winds through a wicker basket and which is connected spirally from the outer periphery to the central section. And, the heat exchanging medium 10 flows in from the spiral outer peripheral section of the heating medium pipe 5 and flows spirally and flows out from the central section. On the other hand the air is sucked in from an air suction section 11 and passes through the heat exchanger 3 and exchanges heat with the heat exchanging medium 10 in a counter flow manner and then discharged from a discharge opening 9. With this arrangement the space can be effectively used and the heat exchange efficiency is raised.

Description

[Detailed description of the invention] 〔Technical field〕 The present invention relates to a heat exchanger unit.

[Background technology]

The conventional technology will be explained using figures. In the heat exchanger unit 1 shown in FIG. 5, 2 is a centrifugal blower, and 3 is a heat exchanger, which includes fins 4 and heat medium pipes 5 through which a heat exchange medium 10 flows.

In the centrifugal blower, 6 is a body part, 7 is a central air suction part, 8 is a blade driving motor, and 9 is a spiral air outlet. As shown in the figure, the air passes through the heat exchanger 3, exchanges heat with the heat exchange medium 10 flowing inside the heat medium pipe 5, is sucked into the body part 6 from the air suction part 7, and is drawn from the discharge port 9. Spit out. However, as is clear from the figure, the air suction section 7 does not need to be hollow, and this space has not been utilized effectively.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned circumstances, and is intended to provide a heat exchanger unit that effectively utilizes the air suction section 7 of the centrifugal blower 2.

[Disclosure of the invention]

The present invention provides a heat exchanger unit 1 for an air conditioner using a centrifugal blower 2, characterized in that a heat exchanger 3 is arranged in an air suction section 7 inside the centrifugal blower 2. Furthermore, in the heat exchanger unit, the tube 5 through which the heat exchange medium 10 for exchanging heat with air is formed into a spiral shape, thereby enabling highly efficient heat exchange. A detailed explanation will be given below with reference to the drawings.

1 and 2 show an embodiment of the present invention. A heat exchanger unit 3 is housed inside the air suction part 7 of the centrifugal blower 2.

The fins 4 of the heat exchanger unit 3 are disc-shaped and have an opening in the center. It has many layers. The opening in the center forms the air suction part II. The heat medium pipe 5 is arranged so as to penetrate through the fins 4. The heat medium pipe 5 passes through the fins 4 in a folded manner and is connected in a spiral manner from the outer portion to the center portion while moving up and down. The heat exchange medium 10 flowing inside the heat medium pipe 5 enters from the outer peripheral portion of the fin 4, exchanges heat with the air while moving up and down, flows into the center portion in a spiral shape, and exits from the heat exchanger 3. Arrow 10 indicates this. Air is sucked in from the air suction section 11, passes through the heat exchanger 3 (passes between the superimposed fins 4), where it exchanges heat with the heat exchange medium 10, and is discharged from the outlet 9 by means of vanes (not shown). Spit out. At this time, since the air and the heat exchange medium 10 flow in opposite directions, highly efficient heat exchange is possible.

FIGS. 3 and 4 show an embodiment in which the fins 4 of the heat exchanger 3 housed inside the air suction portion 7 are provided in a radial shape instead of in a multilayer disc shape. The fins 4 are rectangular and are provided radially from the center. A disk-shaped partition plate 12 having an opening in the center is covered with the fin 4, and air is sucked in from the air suction part 11 formed by the opening, and the fin 4
The air flows through the gap to the outer circumferential portion, and is sucked into the blade portion (not shown) of the centrifugal blower 2. The heat medium pipe 5 spirally passes through the fins 4 from the outer circumferential portion and reaches the center. The heat exchange medium 10 enters from the outer periphery, flows spirally toward the center while exchanging heat with air, and exits the heat exchanger 3. As in FIG. 1, the air and the heat exchange medium 10 are in countercurrent flow at this time, allowing highly efficient heat exchange. In this case, a disk-shaped partition plate 12 having an opening in the center is placed over the top of the heat exchanger 3 to prevent air drift.

2 and 4 are top views of the heat exchanger 3 of the embodiment of FIGS. 1 and 3, respectively. Air is sucked in from the central air suction part 1 and flows to the outer periphery. Thick arrows indicate air flow.

FIG. 4 shows a case where the partition plate 12 is removed. Heat medium pipe 5
are spirally connected from the outer periphery to the center as shown in the figure. The heat exchange medium 10 is transferred from the outer periphery to the heat exchanger 3.
The air enters the air, passes through the inside of the heat medium pipe 5, and exits near the air suction section 11.

〔Effect of the invention〕

As described above, in the present invention, in a heat exchanger unit using a centrifugal blower, by disposing the heat exchanger in the air suction portion 7 inside the centrifugal blower 2, it has been effectively utilized. The space that was previously absent in the air suction section 7 can be utilized to provide a more compact heat exchanger unit. Furthermore, if the tube 5 through which the fluid that exchanges heat with the air passes is formed into a spiral shape, the heat exchange medium 10 can be transferred to the air suction section 7. Since the air and the heat exchange medium 10 flow in a spiral shape from the outer periphery to the center, the air and the heat exchange medium 10 form opposing flows, making it possible to provide an excellent heat exchanger unit that enables more efficient heat exchange.

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 are diagrams showing one embodiment of the present invention.
The figure is a perspective view, FIG. 2 is a top view, FIGS. 3 and 4 are views showing other embodiments of the present invention, FIG. 3 is a perspective view, FIG. 4 is a top view, and FIG. FIG. 2 is a perspective view showing a conventional example. ■... Heat exchanger unit, 2... Centrifugal blower, 3... Heat exchanger, 4... Fin, 5... Heat Medium pipe, 7.11...Air suction part, 8...Motor, 9...
Air outlet, 10...Heat exchange medium, 12.
・・・・・・Partition plate,

Claims (1)

[Claims] 1) A heat exchanger unit using a centrifugal blower in an air conditioner, characterized in that a heat exchanger 3 is disposed in an air suction portion 7 inside the centrifugal blower 2. . 2) The heat exchanger unit according to claim 1, wherein the tube 5 through which the heat exchange medium 10 for exchanging heat with air passes has a spiral shape.