KR20020033010A - mounting method of refrigerant pipe for auger-type ice machine - Google Patents

Abstract

PURPOSE: To provide a method for fixing a refrigerant pipe in an auger type ice making machine in which a brazing work having a superior working efficiency can be carried out and a heat exchanging efficiency enabling ice of superior stable quality to be manufactured is improved. CONSTITUTION: Each of both released ends 2-1, 2-2 of a refrigerant pipe 2 wound around an opening 1-1 of an ice-making cylinder 1 and an outer circumference of the ice-making cylinder 1 in a close helical manner is closely closed and protected by a covering member comprised of a metallic cap 4 of superior heat-resistance characteristic and either a tube or a tape 3. Then, the pipe is fully immersed in a soldering tank A set and monitored at a melted metal temperature higher than a melting point of solder 5, thereby brazing the refrigerant pipe 2 against the ice making cylinder 1 and fixed to it.

Description

Mounting method of refrigerant pipe for auger-type ice machine

The present invention relates to a method for fixing a refrigerant pipe to an auger ice maker, and more particularly to a fixing method for soldering a refrigerant pipe spirally recommended on the outer circumference of an ice maker tube to an ice maker tube. It is about.

The conventional method of soldering and fixing a refrigerant pipe to an ice-making pipe includes a spiral space between an adjacent pipe and an ice-making pipe so that the recommended cross section closely adheres to each other (up and down) along a refrigerant pipe having a circular cross section. Melting temperature of the soldering iron (melting point) after the molten lead is introduced into the solder through the spiral end opening (hereinafter referred to as the former), or when the refrigerant pipe is recommended to the icemaking tube, the soldering pipe is wound together in the spiral space. A method of heating and soldering (hereinafter referred to as the latter) has been used.

Here, in the case of fixing the refrigerant pipe to the outer circumference of the ice making tube by soldering, all the spiral spaces existing between the adjacent pipe and the ice making tube close to each other along the spiral of the refrigerant pipe having a circular cross section must be buried. In addition to improving the heat exchange efficiency of the furnace, the entire ice making tube can be cooled uniformly. That is, only in this way, the ice layer which freezes and grows on the inner peripheral surface of an ice making pipe can be made into the quality state without growth nonuniformity.

In the method of fixing the refrigerant pipe by the former, lead injected from the spiral one end opening of the spiral space is introduced and cured so that the entire spiral space is buried. In this case, in particular, lead is fixed to the refrigerant pipe made of copper pipe, but since lead is not attached to the ice making pipe made of stainless steel, it is difficult to completely bury the entire spiral space. In the latter method of fixing the refrigerant pipe, when the hot-melted lead is attached to an ice making tube made of stainless steel such as the former, it vertically falls out of the spiral space and flows out. As a result, there is a cavity in which both the former and the latter are not buried with lead in the entire surface of the spiral space.

Therefore, according to the conventional fixing method, it becomes a factor that lowers the heat exchange efficiency (heat transfer performance) transmitted from the refrigerant pipe to the ice making tube by the cavity in the entire surface of the helical space, and furthermore, due to the non-uniformity of heat transfer Not only the capacity is significantly lowered, there is a problem that it is impossible to continuously form a stable high quality ice layer on the inner circumferential surface of the ice making tube.

In addition, as there is a space remaining without being buried with lead, the water generated by condensation becomes ice by stopping the refrigeration cycle, and furthermore, the refrigerant pipe is pressurized by the growing ice mass, thereby preventing the refrigerant from passing through. It is a factor that causes problems. That is, it is a great cause of reducing the ice making ability. As a result, in addition to the conventional maintenance and inspection, the refrigerating unit must be replaced in order to repair the ice maker, and the maintenance and management of such a large cost is required. It is a problem in the sense of.

In addition, in the conventional fixing method (soldering operation) by the former and the latter, embedding the entire spiral space invisible from the outside with lead not only requires a lot of labor and skill, but also takes time. Along with the problem of poor work stability, it is a factor that causes an increase in manufacturing costs.

The present invention has been made in view of such a conventional problem, and provides a method for fixing a refrigerant pipe to an auger ice maker which aims to improve heat exchange efficiency to make ice of stable quality by making soldering work with good working efficiency. Its purpose is to.

In order to achieve the above object, the present invention, the open end of the ice making pipe and the open end of the refrigerant pipe recommended in close contact with the outer periphery of the ice making pipe, each sealed protection by a heat resistant coating member, in this state lead It is characterized in that the refrigerant pipe is fixed to the ice making pipe by immersing it in a lead container set to a melting temperature higher than the melting point.

Here, as the covering member, a heat shrinkable tube and a tape, a metal cap, and the like which shrink as a heating is used, and a heat shrinkable tube and a tape are applied to both open ends of the refrigerant pipe and then applied by applying hot air. To close and seal both open ends. In addition, a metal cap is inserted into the opening of the ice making tube or a sealing material such as an O-ring is interposed between the inner circumference of the opening of the metallic cap and the ice making tube, and the metal cap is attached to the opening to close and seal the opening of the ice making tube. It is.

In addition, in this invention, the said molten metal temperature is set to 250-300 degreeC with respect to 50% lead. That is, the melt temperature of 250 to 300 ° C. is a case where the ice making tube and the refrigerant pipe are immersed in the lead container in a normal temperature state, and this limit when the ice making tube and the refrigerant pipe are immersed in a state where the ice tube and the refrigerant pipe are heated to an appropriate temperature in advance. There is no.

According to such technical means, the opening of the ice making tube is closed-sealed with a coating member such as a metal cap, and further, both open ends of the refrigerant pipe spirally recommended around the ice making tube are covered with a coating member such as a heat shrinkable tube or tape. Closed and sealed and immersed in the lead container. Then, as the ice making tube and the refrigerant pipe are heated by the heat of the lead set at 250 to 300 ° C., the lead flows into the entire spiral space between the adjacent refrigerant pipe and the ice making tube. The entire spiral space is completely buried. As the lead which completely buried the helical space is heated and the oiliness becomes good, it is well adhered to the ice making pipe and the refrigerant pipe, so that it does not flow out of the helical space even when pulled out of the lead container. It is cured while being kept buried. Accordingly, the refrigerant pipe is fixed to the outer periphery of the ice making tube in a state where the spiral space is completely buried with lead.

That is, oiliness is obtained by selecting a suitable proxy for heating and dipping of the ice making pipe and the refrigerant pipe by dipping.

In addition, this immersion facilitates the soldering operation and improves the fixing workability of the refrigerant pipe. Furthermore, lead is attached to the entire outer surface of the refrigerant pipe having good oiliness in a film state, and the outer surface of the refrigerant pipe is surrounded by a lead film. Therefore, it is possible to effectively and reliably prevent the water generated by the condensation during the ice making operation from intruding into the ice making pipe from the refrigerant pipes in close contact with each other.

1A to 1B illustrate an example of a method of immersing and fixing a refrigerant pipe to an auger ice maker of the present invention.

Figure 1a is a perspective view showing a state in which a refrigerant pipe is immersed in a lead container ice making pipe recommended (卷 裝).

1B is an enlarged longitudinal sectional view of the main portion thereof;

2 is a perspective view showing a state in which a refrigerant pipe is soldered to an ice making tube.

** Explanation of symbols for main parts of drawings **

A; Lead box 1; Ice maker

1-1; Opening 2; Refrigerant pipe

2-1,2-2; Open end 3; Tube or tape (cover member)

4 ; Metal caps (covering members) 5; lead

6; Spiral space 7; Sealing material

8 ; stopper

Hereinafter, a specific embodiment of the fixing method according to the present invention will be described based on the accompanying drawings.

1 is a perspective view showing an example of a fixing method according to the present invention, in which one open end of an ice making tube 1 and both open ends of a refrigerant pipe 2 recommended to be closely adhered to the outer circumference of the ice making tube 1. (2-1) (2-2) are each sealed and protected by a heat resistant coating member, and in that state, at least the molten lead 5 is immersed in the stored lead container A, which is set at a suitable molten temperature above the melting point. (2) is fixed to the ice-making pipe (1).

In the present invention, when the refrigerant pipe (2) immersing the recommended ice making tube (1) in close contact with the lead container (A) at room temperature, it is important to set and manage the molten metal temperature of the lead container (A) in the range of 250 ~ 300 ℃ Do.

The reason for this is that when the molten metal temperature is 250 ° C. or lower, heat is deprived of the coolant pipe 2 and the ice making tube 1 at normal temperature so that the lead is hardened without introducing lead into the spiral space 6. In this case, the problem of hardening etc. is eliminated by the method of increasing the immersion time to the lead container A, but the new problem of productivity falls is caused. When the molten metal temperature exceeds 300 ° C., the viscosity of the lead 5 is lost, and when leaded out of the lead container A, lead introduced into the spiral space 6 flows out of the space 6 to generate a gap. Done.

Therefore, in order to establish the fixing method (soldering method) of the present invention, it is important to set and manage the molten metal temperature of the lead container A at 250 to 300 ° C in the case of 50% lead, and more preferably 260 to 280 ° C.

That is, the melt temperature of 250 to 300 ° C. is a case where the ice making pipe 1 and the refrigerant pipe 2 are immersed in the lead of the lead container A at room temperature, and the ice making pipe 1 and the refrigerant pipe 2 are previously It is not necessary to apply this limit when immersing in a heated state. For example, when the ice making pipe 1 and the refrigerant pipe 2 are immersed in the lead container A while heated close to the melting temperature (melting point) of the lead 5, the melting point of the lead or higher melting temperature is higher. It is desirable to.

The covering member is formed at the opening 1-1 side of the ice making tube 1 which is immersed so that the lead 5 is not drawn into the ice making tube 1 and the refrigerant pipe 2 when the coating member is immersed in the lead container A. It serves to close and seal both open ends (2-1) and (2-2) of the refrigerant pipe (2), and to cover and protect the surface portion where the lead (5) is unnecessary. It consists of a heat-shrinkable tube or tape (3), a metal cap (4), or the like, which has a high heat resistance and a heat shrinkage with respect to the temperature of, and the open ends (2-1) (2-2) of the refrigerant pipe (2) After the heat-shrinkable tube or tape 3 is applied, hot air is applied and the two open ends 2-1 and 2-2 are hermetically sealed by the tube or tape 3.

The opening 1-1 of the ice making tube 1 has a state in which the metal cap 4 is wound around and the sealing member 7, such as an O-ring, is connected to the inner circumference of the opening of the metal cap 4 and the ice making tube ( 1) is interposed between them, and the metal cap 4 is inserted and coupled to close the seal (see FIGS. 1A and 1B).

In addition, one open end 2-1 of the refrigerant pipe 2 is completely closed by a tube or tape 3, and the refrigerant pipe 2 is leaded in a state in which the surface thereof is covered with the tube or tape 3. When heated by the heat of (5), the expansion air in the pipe (2) is to be discharged to the outside. In addition, the other open end 2-2 of the refrigerant pipe 2 immersed in lead 5 is provided with a stopper 8 made of a heat resistant rubber material or the like, and is covered with a tube or tape 3 thereon. Seal (see Figure 1b).

Therefore, the refrigerant pipe 2 of the present invention is bent to have an inner diameter smaller than the outer diameter of the ice making tube 1, and then assembled and coupled to the outer circumference of the ice making tube 1 in a spirally expanded state. It is recommended to assemble in close contact with the outer periphery in the strong repulsion action (helical tension action) occurring in the recommended direction on the outer periphery of 1).

In addition, when the refrigerant pipe 2 is recommended to be assembled on the outer circumference of the ice making pipe 1, a fulcrum suitable for immersion is applied to the spiral inner circumferential surface of the refrigerant pipe 2 and the outer circumferential surface of the ice making pipe 1 to be immersed and heated. Good oiliness is obtained in the refrigerant pipe 2 and the ice making tube 1 to be used.

Next, the fixing method by immersing the ice-making pipe 1 of the refrigerant pipe 2 will be described. The metal cap 4 and the sealing material 7 are provided at one end opening 1-1 of the ice-making pipe 1. The opening 1-1 is closed-closed in such a way as to be interposed therebetween, and the one open end 2-1 of the refrigerant pipe 2 is opened by the tube or tape 3 and the other open end 2-2. Is covered with a stopper 8 with a tube or tape 3, and in this state, the molten metal temperature is immersed in a lead container A managed in a range of 250 to 300 DEG C with 50% lead (state of FIG. 1A). ). Then, as the ice making pipe 1 and the refrigerant pipe 2 are heated by the heat of lead that is set and managed at 250 to 300 ° C. in the delivery container A, the refrigerant pipe 2 and the ice making pipe 1 adjacent to each other in close contact with each other. Lead is rapidly introduced into the spiral space 6 therebetween to completely bury the entire spiral space 6. At this time, lead is reliably introduced into the inner corner portion of the spiral space 6 in contact with the ice making tube 1 by the capillary shape to completely bury the entire spiral space 6.

Whether the spiral space 6 is completely buried with lead can be confirmed by the worker himself by the bubbles generated as the air in the space 6 rises toward the liquid surface of the lead. The worker pulls up the ice-making pipe from the delivery container A at the time a bubble rises.

The lead which completely buried the helical space 6 is applied to the ice making pipe 1 and the refrigerant pipe 2 to which the appropriate proximal is applied so that the immersion heating is applied, and does not flow out to the outside.

Therefore, the lead 5 pulled up from the lead container A after immersion is hardened in a state in which the spiral space 6 is completely buried with the metal wire 9 without flowing out from the spiral space 6 in a vertical drop. Accordingly, the refrigerant pipe 2 is fixed to the outer circumference of the ice making tube 1 in the state where the spiral space 6 is completely buried with lead (see enlarged view of FIG. 2).

Further, lead 5 is attached to the outer surface of the coolant pipe 2 which has been immersed and heated to have a good oiliness, and the outer surface of the coolant pipe 2 is surrounded by the lead film 5-1. This makes it possible to effectively prevent water generated by condensation due to ice making from invading into the ice-making pipe 1 side between the refrigerant pipes 2 adjacent to each other (see the enlarged view of FIG. 2). .

On the other hand, the coating member is not limited to the above-described heat-shrinkable tube or tape 3 and the metal cap 4, but a refrigerant pipe 2 having heat resistance to lead that is managed at least at 250 to 300 占 폚. As long as it can be sealed so that lead may not be drawn in the both open ends (2-1) (2-2) of the and the opening (1-1) of the ice-making pipe (1).

As described above, the fixing method of the refrigerant pipe according to the auger ice maker of the present invention is configured as described above has the following effects.

The openings of the ice making pipes and the outer circumference of the ice making pipes are immersed in a sealed lid sealed with a relatively heat-resistant coating member without reducing both open ends of the refrigerant pipe spirally recommended. In addition, as the ice making pipe and the refrigerant pipe are effectively heated by the heat of lead set at 250 to 300 ° C. of the lead container, lead is introduced into the entire spiral space between the adjacent refrigerant pipe and the ice making pipe, which is in close contact with each other. Bury completely. The lead, which is buried in the entire spiral space, is attached to the ice-making tube and the refrigerant pipe having a good oiliness suitable for immersion heating and immersion so that lead does not flow out of the spiral space drawn from the lead container. It is cured while being kept buried. Accordingly, the refrigerant pipe is fixed to the outer circumference of the ice making tube while the spiral space is completely immersed with lead.

Further, immersion enables soldering to the entire helical space not visible from the outside, thereby improving solderability. In addition, stable soldering is possible.

Further, by immersion, lead is attached to the entire outer surface of the refrigerant pipe in the form of a film, and the outer surface of the refrigerant pipe is surrounded by a lead film. Accordingly, it is possible to effectively prevent the water generated by the condensation due to the ice making operation from entering between the refrigerant pipes in close contact with each other.

Therefore, it is possible to solder and fix the refrigerant pipe to the ice making tube in a state where the spiral space is completely immersed with lead, and the heat conduction area from the refrigerant pipe to the ice making tube is significantly increased as compared with the conventional ice making machine. It is possible to improve the heat exchange efficiency. In addition, the uniformity of heat transfer significantly improves the ice making ability, and it is possible to efficiently and continuously generate a stable, high quality ice layer on the inner circumferential surface of the ice making tube.

Therefore, according to the fixing method of the present invention, the refrigerant pipe which completely buried the spiral space between the adjacent pipe and the ice-making pipe with lead along the spiral of the spiral refrigerant pipe is strongly fixed to the outer surface of the ice-making pipe, In addition to improving the heat exchange efficiency by increasing the area, it is possible to cool the entire ice pipe uniformly and efficiently without biasing to one side, and it is possible to continuously manufacture stable high quality ice by improving the ice making ability.

Claims (2)

The openings of the ice making pipe and the open ends of the refrigerant pipes recommended in close contact with the outer circumference of the ice making pipe are respectively sealed with a heat resistant coating member, and in that state, at least lead is immersed in a lead container set to a melting temperature of at least the melting point. A method of fixing a refrigerant pipe to an auger ice maker, characterized in that the pipe is fixed to an ice making pipe. 2. The method of fixing a refrigerant pipe to an auger ice maker according to claim 1, wherein the molten metal temperature of the lead container is set within a range of 250 to 300 deg.