Circulating cooling device for reflow ovens and hardening ovens

Abstract

To provide a cooling device with low power consumption, which eliminates high-temperature waste heat and makes water-cooled piping rust-resistant and requires little maintenance when cooling objects in a reflow furnace and a hardening furnace. [Solution] The heat of vaporization of water is used to lower the temperature of the object, and the vaporized water 11 with its increased temperature is returned to the radiator 17, which is then blown with air at a constant indoor temperature by a fan 18 to cool the water in the radiator 17, which is then sent to the object to cool it. Coolant and antifreeze are used for the cooling water, and the piping is rust-resistant, reducing maintenance. A conveyor is also installed on top of this cooling device, making it possible to efficiently use the space required for the main unit.

Description

[Technical field]

[0001] This invention relates to a cooling circulation device that uses liquid to cool objects to be heated in reflow ovens and hardening ovens. [Background technology]

[0002] The objects to be heated in the reflow oven and hardening oven are cooled by indirectly coming into contact with cold water after heat treatment. The water, whose temperature has risen after cooling, is cooled in a chiller device that uses a refrigerant. Cooling in this manner can result in various problems, such as a large amount of power consumption, high temperatures inside the room, which requires an exhaust device or exhaust duct, or hot air being emitted, which can cause environmental problems. Proposals have been made to solve these problems (for example, Patent Document 1).

[0003] [Patent Document 1] Japanese Patent Application Publication No. 11-132692 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in Patent Document 1, the supply of cooling water from an external source is necessary, which causes the device to become large. In order to solve the above problem, the present invention aims to provide a cooling device for use in a reflow furnace and a hardening furnace that efficiently cools an object after heat treatment using the heat of vaporization of water, efficiently cools and circulates a liquid containing water, thereby eliminating the need to replenish cooling water from the outside, thereby downsizing the cooling device and efficiently cooling while maintaining a good environment. [Means for solving the problem]

[0005] This invention uses the principle of lowering the temperature by the heat of vaporization of water (antifreeze water) without using a refrigerant to cool hot objects in reflow ovens and hardening ovens. After cooling the hot object, the vaporized water (antifreeze water) is returned to the radiator through a pipe, and room temperature of 25 to 28 degrees Celsius is blown onto the radiator by a fan to cool the vaporized water (antifreeze water) that has returned to the radiator, and the cooled water (antifreeze water) is sent to the object again, cooling the object using a circulation method. Since the operation cools the water (antifreeze water) without using a refrigerant, it does not require electricity to operate the refrigerant and can be operated with very little electricity. Since the circulating water uses coolant or antifreeze water, rust is less likely to occur in the water (antifreeze water) path. In addition, since the structure does not use a refrigerant, it does not generate high heat, so there is no need for a duct for waste heat, and the installation space can be used meaningfully by installing equipment such as a conveyor on top, eliminating the need for wasted installation space. The cooling system structure is carbon-free and easy to install. Effect of the Invention

[0006] According to this device, when using cold water as a cooling method for objects in a reflow oven or hardening oven with the above structure, the heat is removed from the object by vaporizing the water (antifreeze water) without using a refrigerant, and the vaporized water (antifreeze water) is returned to the radiator and cooled by a fan again to cool the object. Antifreeze water is used for the circulating water (antifreeze water), and the power consumption during operation is less than 1kWh, which saves power. In addition, there is no high temperature heat generation, so no exhaust duct is required. In addition, the cooling device is designed to prevent rust and other issues from occurring in the cold water path of the equipment because antifreeze liquid is used. [Brief description of the drawings]

[0007] [Figure 1] One embodiment of the present invention [Diagram 2] Implementation of the present invention [Diagram 3] Conveyor installation diagram of this invention [Figure 4] Chiller unit installation diagram [Diagram 5] Installation diagram of the conveyor-equipped cooling device of this invention DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] The cooling device of this invention uses the evaporation of water to lower the temperature of the object, and is equipped with a conveyor belt, etc., making it easy to install. EXAMPLES

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0010] FIG. 1 is a diagram showing the cooling device 107 of the present invention. The components are explained below. The water supplied through the water supply inlet 24 at the top is mixed with antifreeze. By mixing the antifreeze, the water passage pipes and the radiator are protected from rust and other damage. An operation panel 25 is located on the front for controlling the water temperature, water level, fan switching, fan error, and water level warnings. A filter 26 is installed at the indoor cold air intake 14 to prevent dirt from the cooling radiator 17 and fan 18, and air that has risen several degrees is released from the bottom of the device. The water inlet and outlet 27 from the device can be installed in four locations: front, back, left, and right. The amount of water can be adjusted by opening the adjustment door 28.

[0011] FIG. 2 is a diagram showing the structure of the present invention. This is a water tank 10 installed in the present device. Cold water (antifreeze water) is stored in the water tank 10. The cold water (antifreeze water) from the water tank 10 is sent to the object 22 to be cooled in the reflow oven and hardening oven by the discharge pump 19, and the cold water (antifreeze water) is sent to the water cooling section 20 of the object 22 to cool it, and the object is cooled by the force of the water 21 vaporized from the cooling water (antifreeze water). The water 11 that has absorbed the heat returns to the radiator 17 in the cooling case 16, and the radiator is cooled in the radiator by the cold air 14 conditioned in the room by the cooling fan 18, and the vaporized water (antifreeze water) is returned to the water (antifreeze water) before vaporization, and the cooled water (antifreeze water) 12 is returned to the water tank 10 and stored, and the cold water (antifreeze water) is circulated.

[0012] Figure 3 shows the installation of a conveyor 101 to effectively utilize the wasted installation space of the present invention. The conveyor 101 is installed above the cooling device of the present invention, and serves as part of the transport system, so that the cooling device of the present invention can be installed near the reflow oven or hardening oven that it uses. In addition, since it does not blow out hot air, no duct is required.

[0013] FIG. 4 shows the installation of a reflow oven and hardening oven 100 in a chiller device. A conveyor 101 for carrying in and carrying out products is installed at the rear or front of the reflow oven and hardening oven 100. The chiller device 102 is installed near the reflow oven and hardening oven 100. To cool the internal equipment of the chiller device, air is drawn in 104 from the side of the device and exhausted 105 from the opposite side. To cool the chiller device, hot air 103 at 55 to 70 degrees is exhausted from the top of the device. To exhaust the hot air 103, an exhaust duct 110 must be installed above the device. Therefore, space is required to install the device and the exhaust duct.

[0014] FIG. 5 shows the installation of the cooling device 107 of the present invention in a reflow furnace and a curing furnace 100. In addition, since the cooling operation is performed by utilizing the evaporation of water, no hot air is discharged from the device, and an exhaust duct 110 is not required. In order to return the evaporated water, the cooled air 108 in the room is drawn into the device, and the air 109 discharged from the device, which has risen by several degrees, is exhausted. In addition, the exhaust is not exhausted from the side like a chiller device, but toward the floor, lowering the temperature and improving the indoor environment. In addition, when installing the cooling device 107, a mounting conveyor 106 is installed on the top, and the rear or front is used for product removal and loading. The cooling device is installed under the mounting conveyor. In installation, since it is a cooling device with a conveyor attached, no unnecessary installation space is required. [Explanation of symbols]

[0015] 10. Aquarium 11. Water that absorbs heat (antifreeze water) (including vaporized water) 12 - Cooled water (antifreeze water) (from vapor to liquid) 13 - Sprayed cooled water (antifreeze water) 14...Cold wind 15...Exhaust 16 Cooling case 17 Radiator 18. Cooling fan 19. Discharge pump 20...Water cooling section of the object to be cooled 21 - Evaporated water 22...Inside of the object to be cooled 23. Hot Part 24...Water inlet 25 Operation panel 26. Anti-soiling filter 27 Water inlet and outlet 28...Adjusting door 100··Reflow oven and hardening oven 101··Conveyor 102 Chiller unit 103·Hot air 104 Intake 105··Exhaust 106··Installation conveyor 107...Cooling device 108: Cold air 109... Air has risen by several degrees 110··Exhaust duct

Claims

1. a water tank for storing liquid; a discharge pump for transporting the liquid from the water tank to the cooling unit; pipes connecting the cooling unit and the water tank to form a circulation path; and a radiator equipped with a cooling fan connected to a part of the pipe between the cooling unit and the water tank, wherein the liquid transported from the water tank through the circulation circuit by the discharge pump cools the object after heat treatment placed in the cooling unit by utilizing the heat of vaporization of water in the liquid, and the liquid after cooling is transported through the circulation circuit together with water vapor, cooled by the radiator, and transported to the water tank for circulating.

2. 2. The cooling device for use in a reflow oven and a hardening oven according to claim 1, wherein the liquid is a coolant or an antifreeze.

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