JPH0427480B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heat exchanger for equipment that heats a refrigerant such as Freon (R-22) and exchanges heat using latent heat.

Conventional configurations and their problems In general, heat exchangers have a configuration in which when the temperature is high on the inlet side, the temperature decreases as the temperature approaches the outlet side. Saturated liquid and superheated steam mix in a chaotic manner, creating an unstable heat exchange behavior.

A conventional example will be briefly explained based on FIGS. 1 and 2.

The figure is a diagram illustrating the principle of a conventional heat exchanger in which the temperature near the inlet is high and the temperature decreases as it approaches the outlet.

In other words, near the inlet of the heat exchanger, the heat medium generally comes in contact with high-temperature exhaust gas, so the heat medium exchanges heat and becomes high temperature, but as it approaches the rear end of the heat exchange, the high-temperature exhaust gas is heat exchanged and the heat energy decreases, and the heat medium is transferred to the heat medium. This also reduces heat exchange and lowers the temperature of the heat medium.

Purpose of the Invention The present invention makes the length of the high-temperature exhaust side passage of a heat exchanger uniform from the inlet side to the outlet to prevent the heat medium from being overheated or underheated, and to keep the heat medium in a state of saturated steam or near the outlet of the heat exchanger. The purpose is to stabilize it by creating a slightly supersaturated state.

Structure of the Invention In order to achieve the above object, the present invention provides a path for passing high-temperature exhaust gas from the fin portion of a heat exchanger directly through the fin portion, and a path for passing high-temperature exhaust gas that has not yet undergone heat exchange through another path within the heat exchanger. A plurality of passages are provided so that the medium is introduced from the heat exchanger to the fin portion and passes therethrough, so that the heat is relatively uniform from the inlet to the outlet of the heat exchanger, so that the medium to be heat exchanged is not overheated or underheated.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 3 to 5.

In the figure, reference numeral 1 indicates a cylindrical heat exchanger body made of a heat-resistant and good thermal conductor, and reference numeral 2 indicates a large number of fins provided on the body. Reference numeral 3 denotes a pipe through which a heat medium passes, which is in close contact with the heat exchanger body 1, and is constructed so as to be continuous from the inlet to the outlet to form one passage. Reference numeral 4 denotes a bottomed cylindrical body fitted inside, and this cylindrical body 4 is provided with a passage 5 in the form of a slit or a plurality of holes. This passageway 5 serves as a passageway for high-temperature exhaust gas. 6 indicates the combustion flame of the burner. 7 is a high-temperature exhaust gas that passes through the fin 2 and the passageway 5.

The action will be explained below.

The high-temperature exhaust gas 7 generated from the burner 6 is transferred to the fin 2
The heat exchanger body 1 and the bottomed cylinder 4 pass through a passageway as shown in the figure to exchange heat with the pipe 3. However, in general, the high temperature exhaust gas is higher at the inlet side of the heat exchanger, and as it passes through the heat exchanger body 1, heat is gradually removed and the temperature decreases, approaching the outlet as shown by line A in Figure 5. The temperature decreases as the temperature increases. Therefore, in this embodiment, in order to introduce the high-temperature exhaust gas 7 that has not yet undergone heat exchange into the fin passage 8 from the middle of the heat exchanger, the exhaust passage passage 5 is branched in the middle of the bottomed cylindrical body 4 to heat the exhaust gas. By incorporating it into the exchange section, the temperature will be distributed as shown by line B in the graph of FIG. 5, with higher areas being lower and lower areas being higher, resulting in a nearly uniform temperature as a whole, resulting in a good heat exchanger.

Effects of the Invention When the heat exchanger of the present invention is used to heat a refrigerant such as R-22 (Freon), it can prevent local overheating and uniformly heat the refrigerant, making it ideal for latent heat heating of the refrigerant. The ratio of superheated steam can be adjusted as desired, and deterioration of the refrigerant due to abnormal overheating can be prevented.

[Brief explanation of drawings]

1 and 2 are a sectional view and characteristic diagram of a conventional heat exchanger, FIG. 3 is a front sectional view of a heat exchanger showing an embodiment of the present invention, and FIG. 4 is a side sectional view of the same, and FIG. Figure 5 shows the characteristic diagram of the same device. DESCRIPTION OF SYMBOLS 1... Heat exchanger body, 2... Fin, 3... Pipe, 4... Cylindrical body, 5... Passing path, 8... Fin passage.

Claims (1)

[Claims] 1. A number of fins of an appropriate height protruding from the inner surface of a cylindrical body made of a heat-resistant and good thermal conductor are provided in the longitudinal direction, and a cylindrical heat-resistant tube with a bottom is fitted so as to be in contact with the tips of the fins, configuring an inner surface of the cylindrical body and between the fin and the heat-resistant cylinder as an exhaust passage;
Further, a heat-conducting pipe through which the medium to be heat exchanged passes is closely attached to the outermost periphery to form a heat exchanger, and one end of the heat-resistant cylinder fitted inside is closed.
High-temperature exhaust gas is passed from the other end through the fin portion as a passage, and a passage is also provided in the middle of the heat-resistant tube, and part of the high-temperature exhaust gas is passed through the passage, and part of the exhaust gas is exchanged through the fin side. A heat exchanger configured to mix with high-temperature exhaust gas and maintain a high temperature state.