JP3122983U - Heat exchanger and hot air heater - Google Patents

Abstract

An object of the present invention is to effectively use the energy of exhaust gas.
According to the present invention, an upper smoke chamber is provided inside the upper part of the vessel body, and a lower smoke chamber is provided inside the lower part of the vessel body, between the bottom plate of the upper smoke chamber and the top plate of the lower smoke chamber. Connecting and opening a plurality of tubes to the heat exchange chamber, connecting the upper and lower smoke chambers, installing a large number of fins on the outside of the tube, and connecting smoke tubes to the upper and lower smoke chambers, respectively, The object is achieved by a heat exchanger characterized in that a connecting portion of a connecting duct is provided on one wall of the heat exchange chamber, and a hot air blowing tube is connected to the other wall.
[Selection] Figure 1

Description

  The present invention relates to a heat exchanger and a hot air heater for the purpose of improving the heating efficiency when heating a greenhouse or the like by blowing warm air into a room.

  Conventionally, when heating indoor air, in a method using combustion heat such as gas or fuel oil, it is common to install a hot air fan indoors and let the indoor air pass through the hot air fan to exchange heat. Has been done.

  Usually, the air heated by the hot air fan is guided to a suitable place in the room by a blower duct, blown out from a plurality of air outlets, and heated while being convected.

For efficient use of near-field energy, use the exhaust heat of combustion smoke to heat the air sent to the combustion chamber (improving combustion efficiency) or attach a heat exchanger to the smoke cylinder (use of exhaust heat) ) Has also been proposed.
JP 2003-279005 A Japanese Patent No. 3627216

  In order to improve thermal efficiency in a warm air heater, there is a proposal of mixing a part of exhaust gas with combustion air (Patent Document 1). In addition, there is a proposal of an invention for improving the thermal efficiency by installing an exhaust heat recovery unit in a warm air heater (Patent Document 2).

  The invention is aimed at improving combustion efficiency or effectively using exhaust heat, and is considered to be effective, and there is a possibility of an apparatus that serves as both.

  However, each of the above-mentioned inventions is an invention of a combustor or a warm air machine itself, and is a proposal of a new equipment. Therefore, for a user, there is a problem that an existing facility has to be replaced or largely remodeled. .

  Further, even in a heat exchanger utilizing smoke, there is a problem that a fan for inhaling air to be heated and blowing it out after heating is an essential condition.

  However, the present invention solves the above-mentioned conventional problems without installing a flow fan because the flow force in the heat exchanger is obtained by utilizing the blowing force of the hot air duct.

  That is, this device is provided with an upper smoke chamber inside the upper body, a lower smoke chamber inside the lower body, and a heat exchange chamber between the bottom plate of the upper smoke chamber and the top plate of the lower smoke chamber. A plurality of pipes are connected and opened to connect the upper and lower smoke chambers, and smoke tubes are connected to the upper and lower smoke chambers, respectively, and a connecting duct connecting portion is provided on one wall of the heat exchange chamber, A heat exchanger characterized in that a hot air blowing tube is continuously connected to the other wall, an upper smoke chamber is provided inside the upper part of the vessel, a lower smoke chamber is provided inside the lower part of the vessel, and the upper smoke A plurality of tubes are connected to the heat exchange chamber between the bottom plate of the chamber and the top plate of the lower smoke chamber, the upper and lower smoke chambers are connected, and a large number of fins are installed on the outside of the tube. In addition, a smoke tube is continuously connected to the upper and lower smoke chambers, a connecting duct connecting portion is provided on one wall of the heat exchange chamber, and a hot air blowing tube is continuously connected to the other wall. The upper smoke chamber is provided inside the upper part of the vessel body, the lower smoke chamber is provided inside the lower part of the vessel body, and between the bottom plate of the upper smoke chamber and the top plate of the lower smoke chamber. Connecting and opening a plurality of tubes to the heat exchange chamber, connecting the upper and lower smoke chambers, installing a large number of fins on the outside of the tube, and connecting smoke tubes to the upper and lower smoke chambers, respectively, The heat exchanger is characterized in that a connection duct blow-in port is provided on one wall of the heat exchange chamber, and a hot air blowing tube is continuously provided on the other wall. In addition, the connection between the heat exchanger and the connection duct is a close connection, or the tip nozzle of the connection duct is loosely fitted in the connection hole of the heat exchanger.

  According to another aspect of the present invention, there is provided a warm air heating apparatus characterized in that an intermediate portion of a warm air duct of a warm air machine is connected to a suction port of a heat exchanger according to claim 1 or 2 installed in a smoke cylinder by a connection duct. A hot air heating apparatus characterized in that one of the hot air blowing tubes of the hot air machine and the intake port of the heat exchanger according to claim 1 or 2 installed in the smoke tube are connected by a connecting duct.

  In another aspect of the present invention, a blow pipe is provided on the right or left of the warm air generation chamber of the warm air machine, and the blow pipe and the suction port of the heat exchanger according to claim 1, 2 or 3 interposed in the smoke cylinder. It is a hot air heating device characterized by being connected by a connecting duct, comprising: an intermediate part of a hot air duct of a hot air machine; and a suction port of a heat exchanger according to claim 1, 2 or 3 interposed in a smoke cylinder. It connects with a connection duct, A damper is provided in the both sides of the connection duct connection part of the said warm air duct.

  In the above, since the heat exchanger does not require a fan, the motor and the rotating blades associated therewith are unnecessary, and there is an advantage that the structure is simplified and the weight and cost are reduced.

  According to the warm air heating device, the room temperature can be made uniform by blowing hot air, blowing from the heat exchanger, and heat convection of hot air (air having a high temperature rises). In a large greenhouse, it is common to install a plurality of indoor air flow fans, but if this device is used and the position of the outlet is appropriately arranged, the number of flow fans can be reduced, or It is also possible to eliminate it.

  In addition, an appropriate guide can be attached to the hot air outlet to apply a fluid force to the indoor air to cause forced flow.

  According to this device, there is an effect that heating of the greenhouse can be performed with high thermal efficiency by effectively using existing facilities or installing a heat exchanger without a fan.

  Moreover, there is an effect that the existing equipment can be used as it is (only a new connection duct is installed) to improve the thermal efficiency.

  In addition, in the case of a new installation, there is an effect that a heat efficiency equal to or higher than that can be improved by a light and inexpensive heat exchanger without a fan.

  The intermediate part of the warm air duct of the warm air machine and the suction port of the heat exchanger installed in the smoke cylinder were connected by a connecting duct. Therefore, a part of the warm air flowing in the connecting duct is sucked into the heat exchanger (forcibly blown), is heat-exchanged and blown into the room as heated hot air. In the above, when a part of the warm air in the warm air duct (for example, 49 ° C.) is blown into the heat exchanger and blown to 62.2 ° C., a recovery temperature difference of 13.2 ° C. is expected.

The recovery temperature difference varies greatly depending on the temperature of hot air, the amount of blowing (for example, 18.8 m ³ / min) and the smoke temperature.

  However, as a general theory, although it differs depending on the temperature difference between the smoke temperature and the blown air and the air volume, the larger the temperature difference and the larger the air volume, the larger the total recovered heat.

  Referring to FIG. 1 (a), an embodiment of the present invention will be described. The base of the connecting duct 3 is connected to the base of the hot air duct 2 of the warm air machine 1, and the tip of the connecting duct 3 is sucked into the heat exchanger 5. Connect to mouth 4.

  In the above embodiment, when warm air is sent to the warm air duct 2 of the warm air machine 1 as indicated by arrows 6 and 6, it is also sent to the connecting duct 3 as indicated by arrow 7 and flows as it is, and the heat exchanger 5 Then, the air enters the heat exchanger 5 as indicated by an arrow 8. Smoke chambers 9, 9 a are provided above and below in the heat exchanger 5, and the smoke chambers 9, 9 a are communicated with each other by circular tubes 10, and a large number of fins projecting to the outside of the circular tubes 10, 10. The thermal efficiency is improved by 10a, and it is discharged into the room as indicated by arrows 18 and 19.

  On the other hand, the exhaust gas in the stack 11 rises as indicated by arrows 12, 13, and 14. At this time, the exhaust heat of the smoke is recovered by the circular tube 10 and the fin 10a. In the figure, 21 is a burner, and 22 is a ventilation fan.

  As described above, since the warm air flowing in the duct is branched by the connecting duct 3 and blown into the heat exchanger 5, a suction fan for sucking the heat exchanger 5 becomes unnecessary.

  In the embodiment, as shown in FIG. 2C, when the nozzle 15 is connected to the tip of the connection duct 3 and the nozzle 15 faces the central portion of the suction port 4 of the heat exchanger 5, the nozzle Since the warm air blown out from 15 as indicated by an arrow 8 sucks indoor air into the heat exchanger 5 as indicated by arrows 16, 17 and 18, in the heat exchanger 5, from the connecting duct 3 Heat exchange is performed as a mixed gas of hot air (for example, 50 ° C.) and indoor air (for example, 25 ° C.) (for example, 33 ° C., if the ratio of indoor air 2 to hot air 1 is set). Since the heat exchange efficiency in this case is higher as the temperature difference is larger, more heat of the exhaust gas can be recovered.

  Referring to FIG. 1B, another embodiment of the present invention will be described. One of the plurality of blowing tubes 20a, 20b, and 20c of the warm air blower 1 is connected to the base end of the connecting duct 3 to 20c. 3 is connected to the heat exchanger 5.

  In the heat exchanger 5, as in the first embodiment, the exhaust gas rises in the smoke cylinder 11, heat is exchanged by the circular tube 10 and the fin 10a, the heated air is discharged into the room, and the exhaust gas is discharged from the smoke cylinder 11a. As shown in FIG. 14, it is discharged to the outside.

  The heat recovery in the above embodiment is the same as that in the first embodiment, and detailed description is omitted.

  3 and 4, a blow pipe 24 or 24 a is provided on the left or right of the hot air generation chamber of the warm air machine 1, and the base end of the connecting duct 3 is provided on the blow pipe 24 or 24 a. Are connected to each other, and the leading end of the connecting duct 3 is connected to the suction port 4 of the heat exchanger 5, in which 23 is a controller.

  In the said Example, the warm air of a warm air production | generation chamber enters into the heat exchanger 5 through the connection duct 3 as shown by the arrow 25 from the blowing pipe 24, heat-exchanges, and is discharge | released indoors like the arrow 26. The

  In the embodiment of FIG. 4, dampers 27 and 27a are provided in the hot air ducts 2 and 2 with the connecting portion of the connecting duct 3 interposed therebetween, and the amount of air flowing through the connecting duct 3 is controlled by opening and closing the dampers 27 and 27a. can do. The controller is used to automatically control the temperature and air volume of the hot air.

(A) The front view which abbreviate | omitted a part of Example of this invention, (b) The front view which abbreviate | omitted a part of other Example similarly. (A) An enlarged side view in which a part of the heat exchanger is also broken, (b) A partially enlarged view in which a part showing the attachment part of the connecting duct is broken, and (c) One of the other embodiments. A partially enlarged view with the part cut off. (A) The front view which abbreviate | omitted a part of other Example similarly, (b) The side view of another Example similarly. The front view which abbreviate | omitted a part of other Example similarly.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hot air machine 2 Hot air duct 3 Connection duct 4 Suction port 5 Heat exchanger 9, 9a Smoke chamber 10 Circular tube 11 Smoke cylinder 15 Nozzle

Claims (7)

  An upper smoke chamber is provided inside the upper part of the vessel, a lower smoke chamber is provided inside the lower part of the vessel, and a plurality of tubes are connected to the heat exchange chamber between the bottom plate of the upper smoke chamber and the top plate of the lower smoke chamber. The upper and lower smoke chambers are connected to each other, smoke tubes are connected to the upper and lower smoke chambers, a connecting duct connecting portion is provided on one wall of the heat exchange chamber, and the other wall is heated. A heat exchanger characterized in that a wind blowing tube is continuously provided.   An upper smoke chamber is provided inside the upper part of the vessel, a lower smoke chamber is provided inside the lower part of the vessel, and a plurality of tubes are connected to the heat exchange chamber between the bottom plate of the upper smoke chamber and the top plate of the lower smoke chamber. And connecting the upper and lower smoke chambers, installing a large number of fins on the outside of the tubular body, connecting smoke tubes to the upper and lower smoke chambers, and one wall of the heat exchange chamber, respectively. A heat exchanger characterized in that a connecting portion of a connecting duct is provided and a hot air blowing tube is continuously provided on the other wall.   An upper smoke chamber is provided inside the upper part of the vessel, a lower smoke chamber is provided inside the lower part of the vessel, and a plurality of tubes are connected to the heat exchange chamber between the bottom plate of the upper smoke chamber and the top plate of the lower smoke chamber. And connecting the upper and lower smoke chambers, installing a large number of fins on the outside of the tubular body, connecting smoke tubes to the upper and lower smoke chambers, and one wall of the heat exchange chamber, respectively. The heat exchanger is characterized in that the connection duct is provided with a blowing port, and one of the hot-air blowing cylinders is connected to the other wall.   The heat exchanger according to claim 1, 2, or 3, wherein the heat exchanger and the connection duct are connected closely or a tip nozzle of the connection duct is loosely fitted in a connection hole of the heat exchanger.   The intermediate part of the warm air duct of the warm air machine or one of the warm air blowing cylinders and the intake port of the heat exchanger according to claim 1, 2 or 3 interposed in the smoke cylinder are connected by a connecting duct. Hot air heating device.   A blow pipe is provided on the right or left of the hot air generation chamber of the warm air machine, and the blow pipe and the suction port of the heat exchanger according to claim 1, which are interposed in the smoke cylinder, are connected by a connecting duct. A hot air heater characterized by   The intermediate part of the warm air duct of the warm air machine and the suction port of the heat exchanger according to claim 1, 2 or 3 interposed in the smoke cylinder are connected by a connecting duct, and both sides of the connecting duct connecting part of the hot air duct The warm air heating device according to claim 1, wherein a damper is provided in the air heater.

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