JPH053022Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a refrigeration device such as a frozen dessert manufacturing device or an ice manufacturing device.

[Prior art]

One type of refrigeration device is a cooling device that is equipped with a cooling tank that is cooled by a circulating cooling medium driven by a compressor, and a drive mechanism that rotationally drives a stirring blade disposed in the cooling tank. be. Japanese Unexamined Patent Publication No. 59-125848 discloses an ice cream manufacturing device that is an example of the refrigeration device.

In this type of refrigeration equipment, in order to cool and freeze the objects to be cooled, such as ice cream, other frozen dessert dough, and water stored in the cooling tank, a compressor is driven to circulate the cooling medium. This is done by rotating a stirring blade at the same time. Therefore, generally the compressor and stirring blade are interlocked with each other,
In addition, the drive is configured to be stopped.

[Problem that the invention attempts to solve]

By the way, in this type of refrigeration equipment, when the compressor is driven with the stirring blades stopped, the inside of the cooling tank functions as a freezer, so it is possible to cool manufactured ice cream, other frozen desserts, ice, etc. It is possible to freeze and preserve it as it is in the tank. However, in conventional refrigeration equipment,
Such frozen preservation is impossible.

Therefore, the purpose of the present invention is to enable the compressor and stirring blade to be driven in conjunction when freezing the object to be cooled, and to drive only the compressor with a simple operation when preserving the object in a frozen state. To provide a changeable refrigeration device with a simple configuration.

[Means for solving problems]

In order to achieve such an object, the present invention provides a refrigeration system of the type described above, in which a drive circuit for the compressor and a drive circuit for the stirring blades are connected in parallel, and the drive circuit for the stirring blades is connected to the drive circuit for the cooling tank. The cooling tank is characterized by being provided with a switch that operates and closes when the lid covering the upper part is attached in a predetermined direction at the upper part of the cooling tank.

[Functions and effects of the idea]

In this configuration, when the lid that covers the upper part of the cooling tank is attached in a predetermined direction, a switch provided in the drive circuit of the stirring blade is closed, so that the stirring blade and the compressor are driven in conjunction with each other. It is possible,
If the lid is attached in a direction other than the above, the switch is open, so the stirring blades are not driven, and only the compressor can be driven. However, in both the freezing process of objects to be cooled and the process of freezing and preserving frozen items, the upper part of the cooling tank must be covered with a lid, and if the lid is installed in a different direction, the Since it is possible to change to either of the two processes, the change between the two processes is easy and reliable, and can be provided with a simple configuration.

〔Example〕

An embodiment of the present invention will be described below based on the drawings. FIG. 1 shows a refrigeration system according to the present invention. The refrigeration device is used for the ice cream disclosed in Japanese Patent Application No. 61-261653 filed by the present applicant.
It is a refrigeration device that also serves as ice production, and includes a cooling tank 11, a container 12 for ice cream production, an impeller 13, an ice holding frame and impeller for ice production (not shown), and a drive mechanism 20, as well as a compressor 31, a condenser 32, and an evaporator. A cooling pipe 33 is provided. Each of these components is shown in Figures 1 and 2.
As shown in the figure, it is housed within a casing 34.

Compressor 31, condenser 32 and cooling pipe 33
constitutes the refrigeration circuit shown in FIG. A bypass pipe 35d is provided between the connecting pipe 35b and the connecting pipe 35c between the cooling pipe 33 and the capillary tube 36b, and an electromagnetic on-off valve 36c is interposed in the pipe 35d. In such a refrigeration circuit, when the on-off valve 36c is closed, the refrigerant flows through the pipes 35b→35a→35c→35e, and when the on-off valve 36c is opened, the coolant flows through the pipes 35b→35d→3.
Cycle 5c → 35e.

The cooling tank 11 has a cylindrical shape with a bottom, around the outer periphery of which a cooling pipe 33 is wound many times, and is buried in the heat insulating layer 37a and opens upward. In the cooling tank 11, a cylindrical through hole 11a is formed at the center of the bottom thereof, and the through hole 11a communicates with a drain hose 37c via a drain channel 37b. Drain hose 37c
As shown in FIG. 2, the holder 37d is removably fitted into a holder 37d provided on one side of the outer surface of the casing 34.

Container 12 for producing ice cream is cooling tank 11
It has a cylindrical shape with a bottom similar to that of the cooling tank 11, and is sized so that a predetermined circumferential gap is formed between the cooling tank 11 and 12 when housed in the cooling tank 11. The container 12 has a cylindrical projection 12a projecting upward from the center of the bottom thereof. Thereby, a predetermined circumferential gap is maintained between the container 12 and the inner periphery of the cooling tank 11 within the cooling tank 11.
The impeller 13 for ice cream production is formed by integrally forming two blades 13b and 13c in upper and lower stages on the outer periphery of a rotating shaft 13a.
A circular recess 13d that fits into the protrusion 12a of the container 12 is formed at the lower end of the container 12a. Also,
A prismatic projection 13e is provided at the upper end of the rotating shaft 13a.
The projection 13e is fitted into a recess 23a of a large diameter gear 23 of a drive mechanism 20, which will be described later. This impeller 13 is inside the container 12,
The recess 13d is fitted into the projection 12a of the container 12, and the projection 13e is fitted into the recess 23a of the large-diameter gear 23, which is positioned and rotatably supported. As shown in FIG. 1, the outer edge of each blade 13b, 13c
It faces close to the inner periphery 12b of.

The drive mechanism 20 includes a drive motor 21 and a small diameter gear 22
As shown in FIG.
a, and its drive shaft 21a protrudes from the small diameter opening 34b of the upper plate 34a. This drive shaft 2
An adapter 21b is fitted to 1a, and the adapter 21b protrudes from the small diameter opening 34b so as to be rotatable together with the drive shaft 21a. adapter 21b
has a rectangular cylindrical shape. The small-diameter gear 22 is provided with an angular recess 22a opening downward in its central boss portion, and is fitted into the adapter 21b of the motor 21 so as to be detachable and rotatable therewith, and is positioned on the upper surface side of the upper plate 34a. do. The large-diameter gear 23 is provided with an angular recess 23a that opens downward in its central boss portion, and has teeth portions 23b on its outer periphery. The recess 23a of the large-diameter gear 23 fits into the protrusion 13e of the impeller 13, and when the impeller 13 is supported in the container 12, it is located above the large-diameter opening 34c of the upper plate 34a and is opposed to the impeller 13. It is designed to be detachable and rotatable. Further, in this state, the teeth 23b of the large diameter gear 23 mesh with the teeth 22b on the outer periphery of the small diameter gear 22.

Reference numeral 38 in FIG. 1 is a lid that covers the upper end of the casing 34. The lid 38 is removably fitted to the upper peripheral edge of the casing 34, and the large diameter gear 23 is inserted into the recess 38a. Central protrusion 23
c and rotatably supports the gear 23.

As shown in FIG. 4, the lid body 38 has permanent magnets 38b and 38c embedded in two predetermined locations on its lower surface, respectively. When the lid body 38 is attached to the upper end of the casing 34 in the predetermined direction shown in FIG. These switches S1 and S2 are closed.

FIG. 5 shows the electric control circuit of the refrigeration system, and in the control circuit, TM1, a1,
TM1・a2, TM1・a3, TM1・b indicate the three normally open contacts and one normally closed contact that the freezing timer TM1 has, and each of these contacts operates at the same time as the timer starts. The recovery time can be adjusted by manual operation of the timer. Also, TM
2・a1, TM2・a2, TM2・a3 are the three normally open contacts of the ice release timer TM2 that melts the ice.These operate at the same time as the timer starts, and their return time is determined by manual operation of the timer. It can be adjusted by S1 and S2 are the above reed switches,
It is a permanently open type. R1 and R2 are the coil parts of the relay, R1・a1, R1・a2 are the normally open contacts of relay R1, and R2・a1, R2・a2 are the relay R2
is a normally open contact, and R2.b is its normally closed contact.

In order to produce ice cream using this freezing device, first, the drain hose 37c is fitted into the holder 37d as shown in FIG. A container 12 filled with ice cream batter is placed in the cooling tank 11. Next, the small diameter gear 22 of the drive mechanism 20 is fitted and assembled into the adapter 21b of the motor 21, and the protrusion 13 of the impeller 13 is inserted into the recess 23a of the large diameter gear 23.
e and assemble the impeller 13 to the large-diameter gear 23, and then insert the impeller 13 in this state into the container 12.
erected inside. The impeller 13 has its rotating shaft 13
The recess 13d of the container 12 is connected to the protrusion 12a of the bottom of the container
By fitting into the container 12, it is positioned and rotatably supported within the container 12. Finally, by attaching the lid 38 to the upper peripheral edge of the casing 34 in a predetermined direction, the refrigeration system is set in the state shown in FIG. In this state, both reed switches S1 and S2 are closed, and then the freezing timer
Set TM1 to 30 minutes, for example. This results in
Each contact of freezing timer TM1 operates, and the contact TM
1・a1 to TM1・a3 are closed, and contact TM1・
b opens, and contacts R1 and a of each relay R1 and R2
1, R1・a2, R2・a1, R2・a2 are closed, and contact R2・b is opened. As a result, the refrigeration lamp L1 lights up, and the fan motor FM and motor 2
1. The compressor 31 is started and the buzzer B is energized.

In this state, the cooling medium flows through the pipe line 35b→3.
5a→35c→35e are rotated in order to cool the cooling tank 11, while the impeller 13 rotates to stir the ice cream dough. As the cooling progresses in the cooling tank 11, the water present in the circumferential gap between the cooling tank 11 and the container 12 freezes, and the two are combined and integrated with minimum ice pressure. At the same time, the container 12 is prevented from turning while maintaining heat conduction between the two 11 and 12. Also. container 1
Ice cream dough is frozen and gradually grows on the inner periphery 12b inside the ice cream 2, and this frozen material is successively scraped off by the impeller 13. After a predetermined period of time has passed, all of the ice cream dough in the container 12 freezes and turns into ice cream, and the cooling timer TM
Several minutes before the time set in step 1 has elapsed, contacts TM1 and a3 of the timer return to open, and at the same time, contacts R2 and a1, R2 and a2 of relay R2,
R2・b returns and each contact R2・a1, R2・a
2 is opened, and contact R2.b is closed. As a result, the driving of the motor 21 and the compressor 31 is stopped, and at the same time, the electromagnetic on-off valve 36c is opened. After several minutes have passed, all remaining contacts of freezing timer TM1 are restored, and contacts TM1・a1, TM1・a
2 is open and TM1.b is closed. At the same time, each contact R1/a1, R1/a2 of relay R1 returns to open. As a result, the freezing lamp L1 goes out, the fan motor FM stops, the on-off valve 36c closes, and the buzzer B sounds a chime for several seconds. This signals the completion of freezing. At this point, the compressor 31 is ready to start.

To freeze and preserve the finished ice cream in the cooling tank 11, move the lid 38 in the left-right opposite position as shown in FIG. Install it in the direction. In this installed state, the reed switches S1 and S2 are not closed, the motor 21 is not driven even if the refrigeration timer TM1 is set, and the compressor 31 is not driven.
Only driven. As a result, the ice cream in the cooling tank 11 is frozen and preserved.

Further, if it is desired to immediately take out the ice cream together with the container from the cooling tank 11, the ice removal timer TM2 is set for several minutes. As a result, the ice release timer TM
2 contacts TM2・a1 to TM1・a3 operate and close, and at the same time each contact of relay R2 operates and each contact R1・a1, R2・a2 closes and contact R2・b opens. . As a result, the de-icing lamp L2
is lit, the compressor 31 is started, the on-off valve 36c is opened, and the buzzer B is energized. In this state, the cooling medium is sent in the form of hot gas to the cooling tank 11 in order to circulate through the pipes 35b→35c→35e, and melts the ice between the tank 11 and the container 12. However, after several minutes have passed, each contact point of ice release timer TM2
TM2・a1~TM2・a3 returned and opened,
At the same time, each contact of relay R2 returns and each contact R
2・a1, R2・a2 are open and contact R2・b
is closed. As a result, the ice-off lamp L2 goes out, the compressor 31 stops, the on-off valve 36c closes, and the buzzer B sounds a chime for several seconds. This informs that the container 12 can be removed from the cooling tank 11.

As described above, in this embodiment, the compressor 31 and the motor 21 (impeller 13) are driven in conjunction with each other by attaching the cover body 38 to the casing 34 in a predetermined direction, and the cover body 38 can be attached in a direction other than the above. By attaching the compressor to the compressor 31, only the compressor 31 is driven. Therefore, the change between the freezing process and the frozen storage process is easy and reliable, and the structure is simple. In particular, as in this embodiment, both gears 22 and 23 driven by the motor 21 are connected to the casing 34.
For those located at the upper end, both gears 22,
Since gear 23 is not driven, the present invention uses both gears 2 and 2.
It is also effective as a means to prevent jamming between 2 and 23.

[Brief explanation of the drawing]

FIG. 1 is a partially longitudinal front view of a refrigeration device according to an embodiment of the present invention, FIG. 2 is a side view of the same, FIG. 3 is a refrigeration circuit diagram of the device, and FIG. 4 is a bottom view of a lid body. FIG. 5 is an electrical control circuit diagram of the device. Explanation of symbols, 11...Cooling tank, 12...Container,
13... Impeller, 20... Drive mechanism, 31...
...Compressor, 34...Casing, 38...Lid,
38b, 38c...Magnet, S1, S2...Reed switch.

Claims (1)

[Scope of utility model registration request] In a refrigeration system comprising a cooling tank that is cooled by a circulating cooling medium driven by a compressor, and a drive mechanism that rotationally drives a stirring blade disposed in the cooling tank, the compressor is driven. When the circuit and the drive circuit for the stirring blade are connected in parallel, and a lid for covering the top of the cooling tank is attached to the drive circuit for the stirring blade in a predetermined direction at the top of the cooling tank. A refrigeration device characterized by being provided with a switch that operates to close.