WO2017048200A1

WO2017048200A1 - Double plated heat exchanger

Info

Publication number: WO2017048200A1
Application number: PCT/TH2015/000059
Authority: WO
Inventors: Nopparat Thipchuwong
Original assignee: Nopparat Thipchuwong
Priority date: 2015-09-18
Filing date: 2015-09-18
Publication date: 2017-03-23
Also published as: PH12018500588A1; US20190041135A1; CN108027214A

Abstract

A heat exchanger comprises double-plated material with good heat conductivity and endurance in the shape of drum with convex wall or cylinder or rectangular shape having inlet(s) for first fluid to be cooled to flow into space between the double layer and out through outlet(s). A plurality of heat exchangers are connected through an inlet tubing where first fluid flows into each heat exchanger and flows out through a connecting outlet tubing. Heat exchange is made between the first fluid and large volume of second fluid the heat exchanger immersed in, where the term fluid covering all types of liquids and gases. The present design efficiently allows heat exchange while clogging is avoided. Installation of elements within heat exchanger to cause change in direction of flow of first fluid increases rate of heat transfer. The disclosed heat exchanger is used as condenser in air-conditioner either in building or in vehicle.

Description

TITLE OF INVENTION

DOUBLE PLATED HEAT EXCHANGER

TECHNICAL FIELD AND INDUSTRIAL APPLICABILITY FOR THE INVENTION

[0001] The present invention relates to a double plated heat exchanger. Field of the Invention

[0002] Efficient heat changing of refrigerant for air-conditioning system is disclosed.

Description of Related Art

[0003] The present invention relates to double plated heat exchanger(s) used to cause decrease in temperature of one fluid which flows into by exchanging heat with a second fluid the heat exchanger immerses in.

BACKGROUND OF THE INVENTION

[0004] The heat exchanger especially the plate type available at present mostly are designed as a closed system both from the higher temperature side and the lower temperature side as a stack-type with multiple plurality of plates (U.S.Patent Nos. 4,688,631 & 9,093,729). The interposition of joints between the successive plates being open in parts to connect the intermediate spaces or gaps created between two plates, with fluid inlet and return collectors. This creates great friction results in too much energy required for pumping limiting volume of fluid to flow into the system. Clogging also occurs easily due to calcium sediment, especially when water is used for cooling. This causes decrease in rate of water flow and thus rate of heat exchange reduced

[0005] The structure design in addition to the presence of such joints limit the utilization of said heat exchangers. As the system is closed, it is very difficult to avoid clogging and to clean up. In addition, the complicate system requires higher technology for manufacturing and the cost of production is too expensive unnecessarily Nonetheless, the use of this type of heat exchanger is limited due to many problems created by the structure designed. [0006] The present invention, the double-layer heat exchanger therefore is designed to overcome all the problems cited regarding the manufacturing, operation and cost saving both on production and energy consumption. The present invention is designed as open system where the first fluid to be cooled flows into the heat exchanger and exchanges heat with large volume of second fluid the heat exchanger immersed in, where the term fluid covering all types of liquids and gases.

SUMMARY OF THE INVENTION

[0007] A heat exchanger comprises double-plated material with good heat conductivity and endurance in the shape of drum with convex wall or cylinder or rectangular shape having inlet(s) for first fluid to be cooled to flow into space between the double layer and out through outlet(s). Multiple heat exchangers are connected through an inlet tubing where first fluid flows into each heat exchanger and flows out through a connecting outlet tubing. Adding element(s) to change direction of flow of fluid in the double layer causes increase in rate of heat exchange. Heat exchange is made between the first 'fluid' and large volume of second fluid the heat exchanger immersed in and where the term fluid covering all types of liquids and gases. The disclosed heat exchanger is used as condenser in air-conditioner either in building or in vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0008]

Figure 1 shows an isometric view of a drum-shape double-plated heat exchanger.

Figure 2 shows a longitudinal sectional view of the drum-shape double-plated heat exchanger.

Figure 3 shows an isometric view of a cylindrical double-plated heat exchanger.

Figure 4 shows the isometric view of a cylindrical double-plated heat exchanger with improvement.

Figure 5 shows an isometric view of a rectangular plated heat exchanger.

Figure 6 shows the welding points between tray and plate.

Figure 7 shows the connection between multiple rectangular plated heat exchangers. Figure 8 shows the isometric view of a rectangular plated heat exchanger mounted with fins.

Figure 9 shows cross-sectional view along line T-T' of the rectangular plated heat

exchanger showing fins.

Figure 10 shows a version with increase surface area of the rectangular plated heat

exchanger.

Figure 11 shows a setting utilization of the rectangular plated heat exchanger to

exchange heat against air.

Figure 12 shows a setting utilization of the rectangular plated heat exchanger to

exchange heat against water

Figure 13 shows a setting utilization of the cylindrical heat exchanger to exchange heat against water.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Figure 1 shows the isometric view of heat exchanger 1. The heat exchanger is a double plated drum made of material of good heat conductivity and remarkable endurance. The outer layer B and inner layer A have clearance C in between to allow fluid to be cooled flowing through. Rings D and E made of the same kind of material are welded at each end having holes 3 and 4 connected to tubes 5 and 6 at each end, respectively.

[0010] Figure 2 is longitudinal section view of the heat exchanger 1. This drum structure with convex wall allows great strength to withstand the pressure of pumping fluid through into the space between the double layer besides making it easier for manufacturing. Flowing of fluid into the heat exchanger 1 through tube 5 and out through tube 6 allow cooling of the first fluid when the heat exchanger 1 is immersed in a second fluid. Thus, the heat exchange is made against fluid outside the double layer heat exchanger 1. If not immersed in water or in any fluid, then the heat exchange is made against air. The term fluid herein covers all types of liquids and gases. [0011] In another embodiment, Figure 3 shows a cylindrical heat exchanger 2 instead of convex wall of the drum yet also having rings D and E welded at each end. Fluid or refrigerant to be cooled is pumped through tube 5 into space between wall A and wall B and out through tube 6. The heat exchanger is immersed in fluid to exchange heat.

[0012] To increase the rate of heat exchange, a half circle element F and G is mounted inside between wall A and wall B as shown in Figure 4, where element F is mounted at a distance one-third of the total length of the cylinder from ring D and element G is mounted at a distance one-third of the total length from ring E. Element F is mounted in a manner that its half point aligned with hole 3 having its ends pointed up, while element G having its half point aligned with hole 4 and its ends pointed down. Elements F and G are made of same kind of material as the heat exchanger. More of these elements may be installed likewise to change direction of flow and allow better movement of fluid as to increase the rate of heat transfer before leaving the heat exchanger depending on the length of the heat exchanger. Similarly, these elements are optionally installed in the drum-type heat exchanger to improve rate of heat exchange. Element(s) causing change in direction of fluid flow within the heat exchanger can be modified to be of any shape yet function to result in the same outcome. [0013] Thus, installing elements) within heat exchanger to change direction of flow of fluid increases rate of heat transfer to make the system more efficient.

[0014] Figure 5 shows a different embodiment with similar concept. Heat exchanger 10 comprises tray 11 made of endurable material with good heat conductivity having many protrusions 17 on its surface. The top of protrusion(s) 17 is welded to plate 12 of the same material as tray 11 as shown in Figure 6 at point(s) W. Tray 11 is sealed tightly to plate 12 along its edge having holes 13 and 15. The fluid to be cooled is pumped into the space within through tube 14 and hole 13 and out through hole 15 and tube 16. [0015] A plurality of heat exchangers are connected to each other through tube 20 as shown in Figure 7, where fluid to be cooled can flow into these many heat exchangers at one time to make cooling most efficient. [0016] Heat exchange is improved further by having fins 21 structure on outer surface of tray 11 and plate 12 as the isometric view shown in Figure 8 and the cross-section view along line T-T' in Figure 9.

[0017] Figure 10 shows increasing area for heat exchange by forming curve on tray 22 and plate 23 where edge of tray 22 is sealed to plate 23 tightly by welding having inlet 24 for fluid to flow in and flow out through outlet 26.

[0018] The heat exchanger as described is used as condenser in air conditioner to exchange heat against air as shown in Figure 11. Figure 11 is top view of an air- conditioning system having fan 31 at the front part, each heat exchange 10 is placed between wall 7 having space 8 between tray 11 and wall 7 while space 9 is between plate 12 and the next wall 7. Spaces 8 and 9 allow air to flow through from back to front when fan 31 is turned on. The operation starts when compressor 30 and fan 31 turn simultaneously on. Compressor 30 compresses refrigerant into each heat exchanger 10 through tube 20 while air flows from back to front and causes heat exchange between the refrigerant and air. The refrigerant is condensed and cooled down and flows out through tube 25 to cooling coil.

[0019] Heat exchange between refrigerant and water is possible as shown in Figure 12. Heat exchangers 10 are immersed in water in water reservoir 36 where the heat exchangers 10 are connected via tube 20 to each other. Refrigerant to be cooled is pumped into heat exchanger 10 by compressor through tube 20 and exchanges heat with water in reservoir 36. Water in reservoir 36 is very cold as pump 32 pumps water into tube 33 to be sprayed by sprinkler 34 to drip down onto equipment 35 where as it drips down the temperature of water decreases to dew point as air is passed through equipment 35 from back to front while fan 31 is on. The very cold water droplets drip down back into reservoir 36 to cool down refrigerant in heat exchanger 10. The cycle is then complete. [0020] The heat exchanger of the present invention, therefore, can be used for heat exchange either between the refrigerant against air as in Figure 11 or against cold water as in Figure 12.

[0021] The heat exchanger 1 or 2 can be used for heat exchange of the refrigerant either against air or water similarly, as shown in Figure 13 where heat transfer from refrigerant is made against very cold water.

[0022] It will be understood that modifications can be made in the above description without departing from the scope of this invention by one of ordinary skill in the art. It is accordingly intended that all matter contained in the above description be interpreted as descriptive and illustrative rather than in a limiting sense.

[0023] It is also to be understood that the following claims are intended to cover all of the generic and specific features of the invention as described herein, and all statements of the scope of the invention which, as a matter of language, might be said to fall therebetween.

Claims

CLAIMS:

1. A heat exchanger comprises double-plated material with good heat conductivity and endurance, having inlet(s) for first fluid to be cooled to flow into space between the double layer and out through outlet(s).

2. A heat exchanger of claim 1 in the shape of drum with convex wall.

3. A heat exchanger of claim 1 in the shape of cylinder.

4. A heat exchanger of claim 1 in the shape of rectangular.

5. A heat exchanger of claim 1 where heat exchange is made between said first fluid and large volume of a second fluid said heat exchanger immersed in, where the term fluid covering all types of liquids and gases.

6. A heat exchanger of claim 1 is used as condenser in air-conditioning system.

7. A plurality of heat exchanger of claim 1 which are connected through tubing and used as condenser in air-conditioning system.

8. A heat exchanger of claim 1 where installation of element(s) within to change direction of flow of fluid causes increase in rate of heat transfer.