JP2600930B2 - Heat exchange equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger that heats a refrigerant with a high-temperature gas and uses the refrigerant in a cooling and heating device.

2. Description of the Related Art There is a refrigerant heating / heating machine as shown in FIG. 5 in which a refrigerant is used as a fluid to be heated and heated by a combustion gas to evaporate and evaporate a liquid refrigerant to carry heat by latent heat and heat.
This is achieved by connecting a heat exchanger 1 between a high-temperature combustion exhaust gas and a refrigerant and a radiator 2 by a closed conduit 3 and by using a refrigerant transfer device 4 such as a refrigerant pump or a compressor provided in the closed conduit 3 to transfer the refrigerant. It is a forced circulation. FIG. 6 shows a conventional example of the heat exchanger 1 (Japanese Patent Application Laid-Open No. Sho 59-107167), in which a plurality of fins 5 are provided on a cylindrical inner peripheral surface of aluminum extending in the horizontal direction. A pipe holding portion 6 and a pipe 7 made of a copper material through which a refrigerant flows are provided in the plane axis direction. The high-temperature combustion exhaust gas from the burner 8 flows horizontally and horizontally to the cylindrical inner surface 9, and the refrigerant This is for heating the refrigerant flowing through the pipe 7 in the horizontal and horizontal direction sent by the transporter 4.

However, in this heating system, an external power is required for transporting the refrigerant, and it is desired that the running cost during the heating operation including the improvement of the heat exchange efficiency be reduced.

Japanese Patent Application Laid-Open No. Sho 63-105395 and Japanese Utility Model Application Laid-Open No. Sho 63-177944 disclose conventional heat exchangers of this type.

In these, two refrigerant passage members each having a large number of refrigerant passages in the vertical direction are used. Further, the flow resistance of the refrigerant is reduced, the flow is divided equally into the two refrigerant passage members, and the combustion exhaust gas of the burner is reduced. The efficiency of heat exchange from water to refrigerant,
It has problems such as smooth heat transfer from the heat transfer fins to the entire refrigerant passage member and uniform temperature, simplification of the configuration of the heat exchange device, and downsizing.

Problems to be Solved by the Invention To reduce the running cost during the heating operation, it is effective to eliminate the external power for transporting the refrigerant and carry out the heat transport without power. When performing refrigerant heating and heating by non-powered heat transfer, the natural circulation force of the gas refrigerant generated by heating the liquid refrigerant is important.

Conventionally, this type of heating device has a configuration like a heat exchanger 1 for heating a refrigerant, as shown in FIGS. 5 and 6, in which a refrigerant flows in a pipe 7 in a horizontal direction and as a continuous passage. As a result, the gas component of the refrigerant in the gas-liquid two-phase mixed state does not flow smoothly toward the outlet due to the heating, causing the refrigerant to stagnate, causing local abnormal overheating or increasing the flow resistance of the refrigerant. Also, the heat exchange rate is low. In addition, since the combustion chamber and the heat exchange section are integrated, the heat exchange amount is not uniform depending on the combustion state, causing local overheating, causing thermal decomposition of the refrigerant or an abnormal temperature rise of the apparatus, thereby causing problems in the reliability performance of the apparatus. .

Further, in the prior art disclosed in JP-A-63-105395 and JP-A-63-179464, refrigerant passage members having a large number of passages are provided on both sides of a combustion chamber. In addition to transmitting heat from the heat transfer fins to each of the refrigerant passage members, the refrigerant passage members have inlet and outlet header tubes communicating with the refrigerant passage members and tubes connecting these left and right header tubes.

In this case, the liquid refrigerant branches from one refrigerant inlet pipe, enters the two left and right inlet header pipes, and is superheated in the process of ascending the passages of the respective refrigerant passage members, forming a gas-liquid two-phase flow and exiting. Blow up into the header tube. From these two outlet headers, they are collected into one refrigerant outlet tube and discharged to the radiator.

As described above, there are large fluctuations in the resistance to the flow of each refrigerant, such as the branch resistance to the flow of the liquid refrigerant, the path resistance of the refrigerant passage member, and the merge resistance due to collision at the point where the refrigerant in the two-phase state of gas and liquid gathers. For this reason, a difference occurs in the flow rate of the refrigerant to the passages of the refrigerant members on both the left and right sides located across the combustion chamber.

In addition, when the heat exchanger is installed at an angle, the difference in the refrigerant flow rate is further increased. Further, the flow of the combustion flame and the combustion exhaust gas in the combustion chamber also tends to fluctuate, and it is difficult to uniformly heat the refrigerant passage members on both the left and right sides. For this reason, a temperature difference occurs between the refrigerant passage members on both the left and right sides, and thermal decomposition due to overheating of the refrigerant is likely to occur, heat exchange also varies widely and high efficiency cannot be maintained, and deformation and breakage due to thermal stress due to uneven temperature. There is also a problem in durability, such as ease of use.

Further, even if the overheat detection sensors are disposed on one of the left and right sides of the refrigerant passage member, the temperature does not reach the representative temperature of the entire heat exchanger, so that it cannot be safely controlled.

Furthermore, there are practical problems such as a complicated configuration, large processing variations during manufacturing, and extremely high cost.

The present invention solves the above-mentioned problems of the conventional example, uniform overheating of the refrigerant and improvement of heat exchange efficiency, smooth flow of the refrigerant and uniform temperature distribution and safety of the heat exchange device, improvement of durability, configuration. It is intended to simplify, reduce the size, and reduce the cost.

Means for Solving the Problems In order to solve the above-mentioned problems, the heat exchange device of the present invention has a plate-shaped heat transfer partition member, and a vertically parallel heat transfer partition member vertically fixed to and fixed to one surface thereof. A refrigerant passage member having a plurality of passages, an inlet header tube provided on the lower side and an outlet header tube provided on the upper side communicating with the passages, and a space tightly fixed to the other surface of the heat transfer partition member. A vertically divided heat transfer fin, a high-temperature gas passage member covering the heat transfer fin and fixed to the transfer wall member, a combustion chamber connected to the high-temperature gas passage member, and a burner communicating with the combustion chamber; A high-temperature exhaust gas inlet formed in a high-temperature gas passage member that guides the combustion exhaust gas from the burner into the above-described upper and lower heat transfer fins and discharges the exhaust gas passing through the heat transfer fins. Equipped with exhaust, The partition plate of the refrigerant passage member has a configuration in which the plate thickness on the heat fin side is larger than the plate thickness on the side opposite to the heat transfer fin.

Operation The present invention has the above-described configuration, and the refrigerant uniformly flows into each passage by flowing vertically through a plurality of passages provided in parallel with the heat transfer partition member from the inlet header tube to one refrigerant passage member, and at the same time, high temperature. The combustion exhaust gas flows into the heat transfer fins divided vertically from the exhaust gas inlet and flows, and the heat uniformly heats the refrigerant passage member through the heat transfer fins. In addition, the refrigerant passage member has a simplified basic configuration with only one side.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 1 to 4, reference numeral 10 denotes a combustion chamber provided in communication with a burner 8 connected to a fuel supply device, 11 denotes a plate-shaped heat transfer partition member, 12 denotes a high-temperature gas passage member, and an outer periphery thereof is provided. An exhaust gas inlet 13 and an exhaust portion 14 are provided in close contact with the heat transfer partition member 11 and communicate with the combustion chamber 10. 15 is a heat transfer partition member
A refrigerant passage member closely adhered and fixed to one surface of 11 and forms a plurality of vertical passages 16, and this passage 16 is a refrigerant passage member 15.
Are formed by the walls 15a and 15b and the partition plate 15c having a varied thickness.

Reference numeral 17 denotes an inlet header tube fixed to the lower end of the refrigerant passage member 15, and 18 denotes an outlet header tube fixed to the upper end of the refrigerant passage member 15, which connects the inlet tube 19 and the outlet tube 20, respectively, each of which is a refrigerant circuit (shown in the drawing). None). The other end of the inlet header pipe 17 is provided with an oil drain pipe 21 bent downward. The inlet header tube 17 and the outlet header tube 18 are each in communication with a longitudinal passage 16. Reference numerals 22A and 22B denote heat transfer fins which are vertically divided on the other surface of the heat transfer partition member 11 and closely adhered and fixed at intervals, and are formed in a wave shape. Combustion chamber
A heat insulating material 23 that covers the entire outer surface of the 10 that is not in contact with the high-temperature gas passage member 12 is provided.

Reference numerals 24 and 25 denote passages formed in the heat transfer fins 22A and 22B for combustion exhaust gas, and reference numerals 26 and 27 denote exhaust passages formed on both sides of the heat transfer fins 22A and 22B and communicate with the exhaust portion 14.

Further, the heat transfer fins 2 of the partition plate 15c of the refrigerant passage member 15 are provided.
The plate thickness on the 2A, 22B side is larger than the plate thickness on the opposite side to the heat transfer fins 22A, 22B.

In the above configuration, the fuel supplied by the fuel supply device is burned by the burner 8, and the high-temperature exhaust gas generated in the combustion chamber 10 passes through the exhaust gas inlet 13 into the upper and lower divided heat transfer fins 22A and 22B. The air passes through the passages 24 and 25 and is exhausted from the exhaust passages 26 and 27 from the exhaust part 14. The liquid refrigerant that has entered the inlet header pipe 17 through the refrigerant inlet pipe 19 flows from a lower portion of the refrigerant passage member 15 into a plurality of vertical passages 16 and rises. Heat transfer fins 22A, 2
Heat is transferred from 2B to the refrigerant passage member 15 via the heat transfer partition member 11, and the refrigerant in the longitudinal passage 16 of the refrigerant passage member 15 is sufficiently heated. Then, the heated liquid refrigerant starts vaporizing and evaporating, and enters a gas-liquid two-phase state in which bubbles are generated in the liquid. The generated bubbles rise upward from below in the passage 16 provided in the vertical direction by a buoyancy effect, and a bubble pump action is generated. In particular, the exhaust gas exits the exhaust gas inlet 13 from the combustion chamber 10, and then is diverted to the heat transfer fins 22A and 22B which are vertically divided. Exhaust gas is blown out from one exhaust gas inlet to make the temperature and flow of the exhaust gas uniform so that the heat transfer fins 22 are divided vertically.
Since the portions A and 22B are heated, the respective portions of the refrigerant passage member can also be uniformly heated, so that the non-powered heat transfer is reliably performed without locally overheating the refrigerant, and no thermal decomposition of the refrigerant occurs. In particular, in the present invention, the heat is smoothly transferred from the wall 15a to the wall 15b by increasing the thickness of the partition plate 15c of the refrigerant passage member 15 on the heat transfer fins 22A and 22B side. Has a uniform temperature.

Furthermore, heat transfer fins 22A, 2 provided at the upper and lower portions of the passage 16
Along with 2B, the entire surface of the heat transfer partition member 11 also becomes a heat transfer area, absorbs heat more efficiently than the exhaust gas, further heats the refrigerant in the gas-liquid two-phase state in the passage 16, and further increases the natural circulation force. Passage 16
Reaches the upper end of the refrigerant, flows into the outlet header tube 18 and flows out of the refrigerant outlet tube 20 toward the radiator (not shown).

In this way, not only the natural circulation is enhanced by heating from the lower part to the upper part of the vertical passage 16, but also the natural circulation force is further increased by heating the lower part by the heat transfer fins 22B.

Effect of the Invention As described above, the heat exchange device of the present invention is a refrigerant passage having a plate-shaped heat transfer partition member and a plurality of passages parallel to the heat transfer partition member in the vertical and vertical directions which are fixedly attached to one surface thereof. Components,
An inlet header pipe provided on the lower side and an outlet header pipe provided on the upper side communicating with the passage; a heat transfer fin which is closely fixed to the other surface of the heat transfer partition member and is divided into upper and lower parts with an interval; A high-temperature gas passage member that covers the heat fins and is fixed to the heat transfer partition member; a combustion chamber connected to the high-temperature gas passage member; a burner communicating with the combustion chamber; and a combustion exhaust gas from the burner. A high-temperature exhaust gas inlet formed in a high-temperature gas passage member that leads to each of the heat transfer fins divided at intervals, and an exhaust unit that discharges exhaust gas passing through the heat transfer fins, and the refrigerant passage member The thickness of the partition plate on the heat transfer fin side is made larger than the plate thickness on the side opposite to the heat transfer fins, and has the following effects.

(1) The present invention is directed to a configuration in which a refrigerant passage member is provided on both left and right sides of a combustion chamber, and an inlet / outlet header tube is provided in each of them, and a tube for assembling the inlet / outlet header tube is provided. Since one refrigerant passage member provided with a plurality of passages parallel to the heat transfer partition is heated from one side thereof through the heat transfer fins, even if the heat exchange device is inclined, each passage from one inlet header tube is provided. And the refrigerant is not evenly heated. In addition, a uniform bubble pump effect is exhibited in each passage.

Further, since one refrigerant passage member is uniformly heated by the exhaust gas, thermal stress is suppressed, and deformation and breakage do not occur. For example, safe detection by one overheat detection sensor is also possible.

(2) By making the thickness of the partition plate of the refrigerant passage member on the heat transfer fin side larger than the thickness of the partition plate on the side opposite to the heat transfer fin, the heat transferred from the heat transfer fin and the heat transfer partition member is reduced. The heat is sufficiently transmitted also to the wall (15b) located on the opposite side of the refrigerant passage member from the heat transfer fins. As a result, the temperature of the entire refrigerant passage member becomes uniform, the refrigerant in the passage can be efficiently heated, the thermal stress is suppressed, deformation and breakage are prevented, and overheating due to a partial temperature difference and thermal decomposition of the refrigerant are prevented. Is prevented.

(3) Unpowered heat transfer becomes possible by the bubble pump action by the rising bubble flow, and heating with low running cost can be performed.

(4) The number of outlet header tubes is also one, and the flow resistance is reduced, so that a smooth refrigerant flow is possible.

(5) Heat transfer fins which are divided into upper and lower portions are provided at positions facing the refrigerant passage member via the heat transfer partition members, and the exhaust gas is divided and passed through each of the heat transfer fins so that the refrigerant passage member has It can be heated uniformly from the bottom to the top.

(6) The configuration of the refrigerant passage member is greatly simplified with only one side, and the size and processing during assembly are small, the variation in assembly is small, the quality is improved, and the cost is reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a heat exchanger showing one embodiment of the present invention,
FIG. 2 is a sectional view of the refrigerant passage member, FIG. 3 is an exploded perspective view of the heat exchange device of FIG. 1, FIG. 4 is a sectional view of an exhaust gas passage portion of the heat exchange device of FIG. The figure is a circuit configuration diagram of a conventional refrigerant heating / heating machine, and FIG. 6 is an external perspective view of a conventional heat exchanger. 8 burner, 10 combustion chamber, 11 heat transfer partition member,
12 ... High temperature gas passage member, 13 ... Exhaust gas inlet, 14 ...
Exhaust part, 15: refrigerant passage member, 15c: partition plate, 16 ...
Passages, 22A, 22B ... heat transfer fins.

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Tatsunori Sakuratake 1006 Kadoma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Koichiro Yamaguchi 1006 Kadoma Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. In-company (56) References JP-A-1-217150 (JP, A)

Claims (1)

(57) [Claims] 1. A refrigerant passage member having a plate-like heat transfer partition member, a plurality of passages vertically and vertically parallel to the heat transfer partition member fixedly attached to one surface thereof, and a lower side communicating with the passage. A heat transfer fin which is closely fixed to the other surface of the heat transfer partition member, is divided into upper and lower spaces at intervals, and covers the heat transfer fin. A high-temperature gas passage member fixed to the hot partition member, a combustion chamber connected to the high-temperature gas passage member, a burner communicating with the combustion chamber, and a combustion exhaust gas from the burner divided into upper and lower parts with an interval. A high-temperature exhaust gas inlet formed in a high-temperature gas passage member that leads to each of the heat transfer fins, and an exhaust unit that exhausts exhaust gas passing through the heat transfer fin, and heat transfer of a partition plate of the refrigerant passage member. The fin side thickness is set to the heat transfer fin Heat exchanger device thicker than the thickness of the contralateral.