JPH07234049A - Ice making machine - Google Patents

Abstract

PURPOSE:To provide an ice making machine capable of effecting the separation of ice quickly while avoiding the generation of overcooling. CONSTITUTION:An ice making machine is provided with a cooling device R, consisting of a compressor 21, a condenser 42, an expansion valve 46 and the evaporation pipe 2 of a cooler 1, and high temperature refrigerant, discharged out of the compressor 21, is condensed in the condenser 42 and is entered the evaporator pipe 2 of the cooler 1 through the expansion valve 46 while ice making water is circulated through the cooler 1 to effect ice making process and the high-temperature refrigerant, discharged out of the compressor 21, is entered the evaporating pipe 2 of the cooler 1 to effect ice separating process. Further, the ice making machine is provided with a fan 22, cooling the condenser 42, a CT sensor 31, detecting the temperature of the condenser 42, an ice making timer, accumulating a predetermined ice making time in the ice making process, and a microcomputer, controlling the operation of the fan 22. The microcomputer stops the fan 22 when the temperature of the condenser 42 is low based on the output of the CT sensor 31 at a time before finishing the ice making time accumulated by the ice making timer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic ice making machine such as a so-called reverse cell type ice making machine or a plate type ice making machine.

[0002]

2. Description of the Related Art Conventionally, this type of ice making machine, particularly an inverse cell type ice making machine, has a large number of downwardly opening ice making machines as shown in, for example, Japanese Utility Model Laid-Open No. 4-52622 (F25C1 / 04). A water tray that can be tilted back and forth is provided below the ice making chamber that divides the small chamber.When the water tray closes the ice making small chamber, the high-temperature high-pressure refrigerant discharged from the compressor is condensed by the condenser. After decompressing with the decompression device, the ice-making water is allowed to flow into the evaporator provided on the outer upper surface of the ice-making chamber to cool the ice-making small chamber and the ice-making water stored in the ice-making water tank is made from the surface of the water tray. While the ice making process is performed by spraying water into the small chamber, the high temperature and high pressure refrigerant from the compressor is directly flown into the evaporator to heat the ice making process while the water tray is opened.

In this case, the condenser is provided with an air-cooling fan, which is operated during the ice making process to accelerate the condensation of the refrigerant and stopped during the ice removing process.

[0004]

Conventionally, the above-mentioned condenser cooling fan has been turned on and off based on the temperature of the condenser in the entire range of the ice making process. Therefore, especially when the ice making process is completed on the verge of turning off the ice making process, At low outside air temperature, the temperature of the condenser becomes too low, so that the temperature and pressure of the refrigerant discharged from the compressor decrease, and it takes a long time for the subsequent deicing process.

If the ice removing process takes a long time, there is a problem that the ice making capacity (ice making efficiency) of the ice making machine is lowered and the ice produced is deformed. Therefore, for example, in Japanese Utility Model Laid-Open No. 62-83160 (F25C5 / 10), when the pressure or temperature of the high-pressure gas refrigerant is low, the fan for cooling the condenser is stopped and the deicing stroke is continued until the temperature rises to a predetermined value. However, this configuration has a problem in that the ice making process becomes too long this time, resulting in overcooling and imposing an excessive load on the equipment.

The present invention has been made to solve the problems of the prior art, and an object of the present invention is to provide an ice making machine capable of quickly removing ice while avoiding the occurrence of supercooling. And

[0007]

That is, an ice making machine of the present invention comprises a cooling device comprising a compressor, a condenser, a decompression device and a cooler, and a high temperature refrigerant discharged from the compressor is condensed by the condenser. Flow into the cooler via the pressure reducing device, and
The ice making water is circulated in the cooler to perform the ice making process, and the high temperature refrigerant discharged from the compressor is allowed to flow into the cooler to perform the ice removing process, and the condenser cooling means for cooling the condenser. And a condenser temperature detection means for detecting the temperature of the condenser, a time limit means for accumulating a predetermined ice making time in the ice making process, and a control means for controlling the operation of the condenser cooling means. The means stops the condenser cooling means when the temperature of the condenser is low based on the output of the condenser temperature detecting means before the time when the ice making time by the time means ends.

[0008]

According to the ice making machine of the present invention, the control means cools the condenser when the temperature of the condenser is low based on the output of the condenser temperature detecting means before the time when the ice making time by the time limit means ends. Since the means is stopped, it is possible to increase the temperature or pressure of the refrigerant discharged from the compressor, particularly at the time of entering the ice-freezing process such as when the outside temperature is low.

Therefore, the ice making process can be quickly completed to improve the ice making capacity, and the deformation of the ice can be prevented. In addition, since it does not affect the start of the ice removal process, the ice making time by the time limit means is not extended, and therefore the occurrence of supercooling is also eliminated, and the equipment may be damaged by an excessive load. It can be prevented.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 is an electric circuit diagram of a control device 20 of an ice making machine I of the present invention, and FIG. 2 is an ice making machine I in a state where a water tray 5 is in a horizontal closed position.
3 is a side view of the ice making section of FIG. 3, FIG. 3 is a side view of the ice making section of the ice making machine I with the water tray 5 in the inclined open position, and FIG. 4 is a refrigerant circuit diagram of the cooling device R of the ice making machine I.

2 and 3, the ice making machine I of the embodiment is shown.
Is a so-called reverse cell type ice making machine, which has a large number of downwardly opening ice making chambers 1A therein, and a cooler 1 provided with an evaporation pipe 2 of a cooling device R on an outer surface of an upper wall thereof, Figure 2
At a predetermined horizontal closing position such as shown above, each ice making chamber 1A is closed from below with a sufficient margin, and a water tray 5 having a fountain hole and a return hole (not shown) corresponding to each ice making chamber 1A is formed on the surface.
And a water tank 6 fixed to the water tray 5 and communicating with the return hole, and water in the water tank 6 is ejected from the fountain hole through a water supply pipe 7 and a distribution pipe (not shown) to form each ice making chamber 1A. A circulation pump 9 for circulating the water tray 5, a drive device 11 including a reduction gear motor 10 having a high gear ratio capable of rotating the water tray 5 in a tilting and returning directions, and a water tray 5 when the water supply solenoid valve 12 of FIG. 4 is opened. And a water level switch WLSW which operates by a float provided in the water tank 6 and detects a predetermined full water level of the water tank 6, and the like.

Then, the mounting plate 1 fixed to the support beam 15
An output shaft of the reduction motor 10 supported by the first and second arms 17 </ b> A and 1 </ b> A extending in mutually opposite directions.
7B is connected to the drive cam 17, and the coil spring 18 is attached to the end of the first arm 17A of the drive cam 17.
The other end of the water tray 5 is connected to the side portion of the water tray 5, and the rear portion of the water tray 5 is supported by the rotating shaft 19.

The ASW is a contact-type water tray position detection switch for detecting the horizontal closed position and the tilted open position of the water tray 5 by opening and closing the contacts. The water tray position detection switch ASW is in a positional relationship in which the first and second arms 17A and 17B of the drive cam 17 come into contact with each other, and when the drive cam 17 rotates counterclockwise in FIG. When the water tray 5 is in the tilt open position, the second arm 17B abuts on the water tray position detection switch ASW as shown in FIG. 3, whereby the contact of the water tray position detection switch ASW is closed and the return side. Is switched and inverted.

When the drive cam 17 rotates clockwise in the figure due to the reverse rotation of the deceleration motor 10, the first arm 17A detects the position of the water tray when the water tray 5 is in the horizontal closed position as shown in FIG. The switch contacts the switch ASW, whereby the contact of the water dish position detection switch ASW is opened and switched and inverted to the tilting side.

The above are the components provided on the ice making section side of the ice making machine I. On the machine room side of the ice making machine I, the compressor 21, the auxiliary condenser 41 and the condenser of the cooling device R as shown in FIG. A container 42 and the like are provided. Next, the refrigerant circulation in the cooling device R will be described with reference to the refrigerant circuit diagram of FIG.
The high-temperature and high-pressure gas refrigerant discharged from 1 is the auxiliary condenser 4
After flowing into 1 and radiating heat, it returns to the compressor 21 once, and is discharged again to reach the three-way pipe 43. The refrigerant discharged from one outlet of the three-way pipe 43 is air-cooled and condensed in the condenser 42, passes through the liquid receiver 44 and the dryer 45, and then the expansion valve 4 as a pressure reducing device.
Up to 6.

The refrigerant throttled by the expansion valve 46 flows into the evaporation pipe 2 to evaporate and absorb heat from the cooler 1 to cool it. And this evaporation pipe 2
The refrigerant that has exited is returned to the compressor 21 via the accumulator 47. In addition, the expansion valve 46 is connected from the other outlet of the three-way valve 43.
A hot gas pipe 48 in which a hot gas solenoid valve 23 is provided is connected to the outlet side of the hot gas solenoid valve 23, and a high temperature and high pressure gas refrigerant (hot gas) discharged from the compressor 21 with the hot gas solenoid valve 23 open. ) Is directly supplied to the evaporation pipe 2.

Next, in the control device 20 of FIG. 1, the following circuits are connected to the power supply AC via the operation switch 35. That is, the compressor 21 constituting the cooling device R is connected in series with the relay R1, and the condenser cooling fan 22 as a condenser cooling means for cooling the condenser 42 of the cooling device R is connected in series with the relay R2. Has been done.

The circulation pump 9 is connected in series with a relay R3, the hot gas solenoid valve 23 is connected in series with a relay R7, and the water supply solenoid valve 12 is connected in a relay R4.
And are connected in series. Further, the reduction motor 10 is connected in series with the relay R5 and the switching relay R6. The switching relay R6 is closed to the contact a side to rotate the deceleration motor 10 in the forward direction and switched to the contact b side to rotate the deceleration motor 10 in the reverse direction.

These relays R1 to R7 are controlled by a general-purpose microcomputer 25 as a control means. The water level switch WLSW and the water tray position detection switch ASW are connected to the input of the microcomputer 25, and the ice storage switch BSW that closes the contacts when a predetermined full ice amount in the ice storage (not shown) is detected is connected. . Further, the input of the microcomputer 25 is an ET sensor 26 for detecting the temperature of the cooler 1, and a CT sensor 31 as a condenser temperature detecting means for detecting an outlet temperature of the condenser 42 (temperature of the condenser 42). A WT sensor 51 for detecting the water temperature in the water tank 6 and an AT sensor 52 for detecting the outside air temperature are connected, and a forced water supply switch 53 for forcibly supplying water by the water supply solenoid valve 12 and a forced disconnection. Forced deicing switch 55 for ice
Further, a feed switch 54 for switching the display of the display 29 described later and for fast-forwarding the time is connected. The forced water supply switch 53, the forced ice removal switch 55, and the feed switch 54 are arranged side by side on the substrate in this order.

A monitor 27 and a display unit 29 are connected to the output of the microcomputer 25, and the display unit 29 is composed of a 7-segment 2-digit LED.
Further, the microcomputer 25 has, for example, EEPRO.
A memory 30 composed of M is connected, and the memory 30 continues to retain the stored contents even if the power supply to the ice making machine I is cut off, and erases the stored contents by a clear operation described later.

Next, a flow chart showing a program of the microcomputer 25 of FIGS. 5, 6 and 10.
The operation of the ice making machine I will be described based on the operation process charts of the ice making machine I shown in FIGS. 7 to 9. After installing the ice maker I, or because it has not been used for a long time, or due to an instantaneous power failure, the power supply AC
After the power is cut off, the operation switch 35 is closed again and the ice making machine I
It is assumed that the power is turned on (ON). At this time water tray 5
The position of is not fixed, the horizontal blocking position (Fig. 2)
Or, it is in an inclined open position (FIG. 3) or an inclined state in the middle thereof, and the inclined state may be in the middle of tilting or in the middle of returning.

However, such a state can be discriminated into two types by the open / closed state of the contact of the water tray position detection switch ASW. That is, when the contact of the water tray position detection switch ASW is open and is on the tilt side, the water tray 5 is in the horizontal closed position or in the middle of tilting, and the contact of the water tray position detection switch ASW is closed and is on the return side. At one time, the water tray 5 is in the inclined open position or in the middle of returning.

Therefore, when the operation switch 35 is closed and the power supply AC is turned on (ON), the microcomputer 25 determines the state of the water tray position detection switch ASW in step S1 and the contact is open to the tilting side. If there is (Fig. 7
Situation. The water tray 5 is in the horizontal closed position or in the middle of tilting),
In step S2, the relay R5 is closed and the switching relay R
6 is closed to the contact a side, the deceleration motor 10 is normally rotated, and the water tray 5 is tilted. Then, in step S4, the state of the water tray position detection switch ASW is discriminated again, and if it is still on the tilt side, the process returns to step S2 to continue tilting. The water tray 5 comes to the predetermined tilt open position, and the water tray position detection switch AS
When the contact point of W is closed and reversed to the return side, the microcomputer 25 proceeds from step S4 to step S5 and this time closes the switching relay R6 to the contact point b side, and the deceleration motor 10
Reverse and start the return movement of the water tray 5.

Next, in step S6, the microcomputer 25 determines whether or not it is 15 seconds before the water tray 5 is completely closed (horizontal closed position). The state of the ASW is judged, and if it is still on the backward movement side, the procedure returns to step S5 to continue the backward movement. Then, 15 seconds before, the process proceeds from step S6 to step S7, the relay R4 is closed and the water supply solenoid valve 12 is opened (ON). When the water supply solenoid valve 12 is opened, water is sprayed from the sprinkler 13 onto the surface of the water tray 5, and mainly through the return hole to the water tank 6.
Will be supplied with water. Next, in step S8, the water level switch WL
It is determined by SW whether or not the water level in the water tank 6 has reached a predetermined full water level, and if not, the process proceeds to step S9.

After that, when the water tray 5 is in the horizontal closed position (FIG. 2) and the contact of the water tray position detection switch ASW is opened and inverted to the tilting side, the microcomputer 25 returns from step S9 to step S6. Therefore, the return movement of the water tray 5 is stopped.

On the other hand, when the contact of the water tray position detection switch ASW is closed and is on the backward movement side when the power source AC is turned on (the situation of FIG. 7. The water tray 5 is in the inclined open position or the backward movement position). During the movement), the microcomputer 25 proceeds from step S1 to step S3 to close the relay R5, close the switching relay R6 to the contact b side, reverse the deceleration motor 10, and move the water tray 5 back. After that, the process proceeds to step S6, and thereafter, the return movement is continued until the water dish position detection switch ASW is reversed to the tilt side in step S9 as described above, and the water dish 5 is similarly stopped at the horizontal closed position.

Thus, the microcomputer 25 determines the state of the water tray 5 according to the open / closed state of the contact of the water tray position detection switch ASW when the power is turned on (ON), and the water tray 5
If it is judged that the horizontal closing position or the tilting is in progress, the water tray 5
Is temporarily tilted and then returned to a predetermined horizontal closing position, and when it is judged that the water tray 5 is in the tilt open position or in the middle of returning, the water tray 5 is moved back to the horizontal closing position. Position. In any case, according to the ice making machine I of the present invention, after the power is turned on, the water tray 5 is always initialized to the horizontal closed position.

After that, when the water level switch WLSW detects the full water level in the water tank 6, the routine proceeds from step S8 to step S10 in FIG.
Stop 2 (OFF). Next, the microcomputer 25 proceeds to step S12 and relays R3 and R3.
7 is closed, the circulation pump 9 is operated (ON), and the hot gas solenoid valve 23 is opened (ON).

When the circulation pump 9 is operated, the water in the water tank 6 is sprayed from the fountain hole into the ice making chamber 1A, and is circulated in the route returning from the return hole to the water tank 6. As a result, the dust and water stains accumulated or attached in the circulating water passage are washed, and the dust clogging the fountain hole is also removed.

Next, the microcomputer 25 determines in step S13 whether or not the count of the timer as its function is 30 seconds, and if not, the process returns to step S12 to continue the cleaning. After such cleaning is performed for 30 seconds, the microcomputer 25 executes step S
From 13 to step S14, the relay R1 is closed, the compressor 21 is started, and at the same time, the following ice removing process is performed.

In this ice removal process, the microcomputer 2
Numeral 5 opens the relays R2 and R3, stops the condenser cooling fan 22 and the circulation pump 9, closes the relays R5 and R7, closes the switching relay R6 to the contact a side, and causes the deceleration motor 10 to rotate normally. , Tilt the water tray 5. Further, since the hot gas solenoid valve 23 is opened, the high-temperature high-pressure gas refrigerant (hot gas) discharged from the compressor 21 is circulated through the evaporation pipe 2 to heat the cooler 1.

When the water tray 5 is tilted to a predetermined tilt open position (fully opened) as shown in FIG. 3, the second arm 17B of the drive cam 17 contacts the water tray position detection switch ASW and is returned to the return side. Since it is inverted, the microcomputer 2
5 opens the relay R5 to stop the deceleration motor 10 and stop the tilting of the water tray 5. When the water tray 5 is at the inclined open position, the circulating water in the water tank 6 is drained to a drainage section (not shown) located immediately below the water tank 6. The temperature of the cooler 1 taken in by the ET sensor 26 is, for example, +9.
It is judged whether the temperature is higher than the completion temperature of ice removal such as ℃, and if it is higher, the relay R5 is closed and the switching relay R
6 to the contact b to rotate the deceleration motor 10 in the reverse direction,
To move upwards.

When the water tray 5 returns to a predetermined horizontal closed position (fully closed) as shown in FIG. 2 by such a returning movement, the drive cam 1
1st arm 17A of 7 is a water tray position detection switch ASW
The microcomputer 25 opens the relays R5 and R7, closes the hot gas solenoid valve 23, and stops the deceleration motor 10 to stop the return movement of the water tray 5. Then, the microcomputer 25 proceeds to step S15 to close the relay R1 and operate the compressor 21 to shift to the following ice making process. It should be noted that the microcomputer 25 closes the relay R4 15 seconds before the water tray 5 is completely closed to close the water supply solenoid valve 1.
2 is opened, and water supply to the water tank 6 is started as described above.

FIG. 10 shows the operation of the microcomputer 25 during the ice making process. In the ice making process, the refrigerant discharged from the compressor 21 is condensed and liquefied by the auxiliary condenser 41 and the condenser 42 as described above, is squeezed by the expansion valve 46, is then supplied to the evaporation pipe 2, and is evaporated there. Cool the cooler 1. Further, the microcomputer 25 uses the relay R2
Also, the relay R4 is closed to operate the condenser cooling fan 22 while supplying water, and the relay R3 is closed to operate the circulation pump 9 to drive the water in the water tank 6 from the fountain holes to the respective ice making chambers 1.
Circulate to A.

After that, the microcomputer 25 judges whether or not the water level switch WLSW is closed, a predetermined amount of water is supplied to the water tank 6, and the water level switch WLSW detects a predetermined full water level and closes the relay R4. The water supply solenoid valve 12 is opened and the water supply is stopped. In addition, in step S20 of FIG. 10, the microcomputer 25 takes in the water temperature in the water tank 6 based on the output of the WT sensor 51 and determines whether the water temperature has reached, for example, + 3 ° C. or lower for 3 seconds. Then, it waits until this condition is satisfied, and if the condition is satisfied, the microcomputer 25 proceeds to step S21, and starts the integration of the ice making timer as a time limit means having its function. Next, in step S22, the integrated value of the ice-making timer is equal to the integrated time TS-
It is determined whether or not 3 minutes have been reached, and if not, the integration of the ice making timer is continued in step S21.

By the ice making operation, the ice making chamber 1 of the cooler 1
Ice is gradually generated in A. Then, three minutes before the integration of the ice making timer is completed, the microcomputer 25 advances from step S22 to step S23,
The temperature of the condenser 42 is taken in based on the output of the CT sensor 31, and it is determined whether the temperature of the condenser 42 is + 20 ° C. or lower.

When the result in step S23 is NO, the microcomputer 25 proceeds to step S24, and this time judges whether the temperature of the condenser 42 is + 35 ° C. or lower. If not here either, the microcomputer 25 proceeds from step S24 to step S25, and the condenser temperature is +4.
It is determined whether the temperature is 5 ° C. or lower, and if it is also negative here, step S
At 34, it is judged whether or not the integration of the 3-minute timer, which the microcomputer 25 also has as its function, has elapsed 3 minutes after the step S22, and if not, wait for 3 minutes.

When 3 minutes have passed, that is, when the ice making time TS of the ice making timer at this place has passed, the microcomputer 25 proceeds to step S16 of FIG. 6 to open the relays R2 and R3 to cool the condenser. Fan of 22
And the circulation pump 9 is stopped. Next, the relays R5 and R7 are closed, the switching relay R6 is closed to the contact a side, the deceleration motor 10 is normally rotated, the tilting of the water tray 5 is started, and the hot gas solenoid valve 23 is opened to evaporate. The high-temperature high-pressure gas refrigerant (hot gas) is circulated in the pipe 2 to heat the cooler 1 and the ice-making chamber 1A shifts to the ice-freezing step.

This ice removing process is executed in the same manner as described above. Then, during this ice removal process, the microcomputer 25 determines whether or not the ice storage switch BSW is closed. If a predetermined amount of ice is stored in the ice storage (not shown), the microcomputer 25 proceeds to step S17 and relays R1 and relays. R7 is opened, the operation of the compressor 21 is stopped, and the ice storage process is started. After that, the ice in the ice storage decreases and the ice storage switch BSW
Is maintained until it is closed, and when the ice storage switch BSW is closed, the ice making process is executed again.

On the other hand, when the outside air temperature is low, such as in winter, and the temperature of the condenser has dropped to + 20 ° C. or lower 3 minutes before the integration of the ice making timer is completed in the ice making process, The microcomputer 25 proceeds from step S23 to step S26 and opens the relay R2 to stop the condenser cooling fan 22. And step S2
In step 7, it is determined whether or not the integrated value of the 3-minute timer that the microcomputer 25 also has as its function has passed 3 minutes after step S22. If not, wait 3 minutes before the step S16 is terminated. Proceed to the ice process.

That is, when the temperature of the condenser 42 is + 20 ° C. or lower 3 minutes before the ice-making time TS elapses, the microcomputer 25 condenses for 3 minutes until the ice-making time TS elapses thereafter. The fan 22 for cooling the vessel is stopped, and the ice-removing process is started as the ice-making time elapses.

If the temperature of the condenser is higher than + 20 ° C. but lower than + 35 ° C., the microcomputer 2
In step 5, the process proceeds from step S24 to step S28, and it is determined whether the integrated value of the 1-minute timer that the microcomputer 25 has as its function has passed 1 minute after step S22. wait. And
After one minute, the microcomputer 25 makes a step S
29, the relay R2 is opened in the same manner as described above, and the condenser cooling fan 22 is stopped. Next, in step S30, it is determined whether or not the integrated value of the 2-minute timer that the microcomputer 25 also has as its function has passed 2 minutes after step S28. Proceed to the ice removal step of step S16.

That is, if the temperature of the condenser 42 is higher than + 20 ° C. and lower than + 35 ° C. 3 minutes before the ice-making time TS elapses, the microcomputer 25 sets 1
2 minutes before the ice-making time TS elapses
The condenser cooling fan 22 is stopped for one minute, and the ice removing process is started as the ice making time elapses.

Further, when the temperature of the condenser is higher than + 35 ° C. but lower than + 45 ° C., the microcomputer 2
In step 5, the process proceeds from step S25 to step S31, and it is determined whether the integrated value of the two-minute timer that the microcomputer 25 has as its function has passed two minutes after step S22. wait. And
After 2 minutes, the microcomputer 25 performs step S
In step 32, the relay R2 is opened and the condenser cooling fan 22 is stopped as described above. Next, in step S33, it is determined whether or not the integrated value of the 1-minute timer, which the microcomputer 25 also has as a function, has passed 1 minute after step S31. If not, wait 1 minute. Proceed to the ice removal step of step S16.

That is, if the temperature of the condenser 42 is higher than + 35 ° C. and lower than + 45 ° C. 3 minutes before the ice-making time TS elapses, the microcomputer 25 sets 2
1 minutes after the lapse of time until the ice making time TS elapses thereafter
The condenser cooling fan 22 is stopped for one minute, and the ice removing process is started as the ice making time elapses.

As described above, according to the present invention, the microcomputer 25 detects the output of the CT sensor 31 at 3 minutes before the ice making time TS by the ice making timer ends.
When the temperature of the condenser 42 is low, the condenser cooling fan 22 is stopped. Therefore, in particular, at the time of entering the ice-freezing process when the outside temperature is low, the temperature or pressure of the high-temperature refrigerant discharged from the compressor 21 can be increased.

Therefore, the subsequent ice removing process can be quickly completed, the ice making capacity of the ice making machine I can be improved, and the ice deformation can be prevented. Further, since it does not affect the start of the ice removing process, the ice making time TS by the ice making timer is not extended,
Therefore, the occurrence of overcooling in the cooler 1 is also eliminated, and it is possible to prevent damage to other devices due to an excessive load caused thereby.

In particular, in the embodiment, the time for stopping the fan 22 is changed according to the temperature of the condenser 42, and the fan 22 is stopped for a long time when the temperature is low and short when the temperature is relatively high. It is possible to stabilize the temperature of the condenser 42 at the time of entering the stroke and prevent it from becoming higher than necessary. Further, since the temperature of the condenser 42 is raised immediately before the end of the ice making process, it is possible to speed up the ice removing process without impairing the cooling capacity of the evaporation pipe 2 of the cooler 1 in the ice making process. .

Although the so-called reverse cell type ice making machine has been described in the embodiment, the present invention is not limited to the so-called plate type or downflow type ice making machine.

[0050]

As described above in detail, according to the present invention, when the temperature of the condenser is low based on the output of the condenser temperature detecting means at the time before the ice making time by the time limiting means is finished. Since the condenser cooling means is stopped, it is possible to increase the temperature or pressure of the refrigerant discharged from the compressor, particularly at the time of entering the ice-freezing process, such as when the outside temperature is low.

Therefore, the ice making process can be quickly completed to improve the ice making ability and deformation of the ice can be prevented. In addition, since it does not affect the start of the ice removal process, the ice making time by the time limit means is not extended, and therefore the occurrence of supercooling is also eliminated, and the equipment may be damaged by an excessive load. It can be prevented in advance.

[Brief description of drawings]

FIG. 1 is an electric circuit diagram of a control device for an ice making machine according to the present invention.

FIG. 2 is a side view of an ice making chamber portion of the ice making machine with the water tray in a horizontal closed position.

FIG. 3 is a side view of an ice making chamber portion of the ice making machine in a state where the water tray is in the inclined open position.

FIG. 4 is a refrigerant circuit diagram of the cooling device of the ice making machine of the present invention.

FIG. 5 is a flowchart showing a program of a microcomputer.

FIG. 6 is a flow chart showing a program of the same microcomputer.

FIG. 7 is an operation process diagram of the ice maker.

FIG. 8 is likewise an operation process chart of the ice maker.

FIG. 9 is also an operation process chart of the ice making machine.

FIG. 10 is a flowchart showing a program of a microcomputer for explaining the operation during the ice making process.

[Explanation of symbols]

 I Ice Maker R Cooling Device 1 Cooler 1A Ice Making Room 2 Evaporating Pipe 5 Water Dish 10 Deceleration Motor 20 Controller 21 Compressor 22 Fan 25 Microcomputer 31 CT Sensor 42 Condenser 46 Expansion Valve

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Hideyuki Katayanagi 2-5-5 Keihan Hondori, Moriguchi City, Osaka Prefecture Sanyo Electric Co., Ltd. (72) Inventor Yukio Takase 2-5 Keihan Hondori, Moriguchi City, Osaka Prefecture No. 5 Sanyo Electric Co., Ltd.

Claims (1)

[Claims] 1. A cooling device comprising a compressor, a condenser, a decompression device and a cooler, wherein the high temperature refrigerant discharged from the compressor is condensed in the condenser, and the high temperature refrigerant is discharged to the cooler via the decompression device. In the ice making machine, the cooling water is circulated in the cooler to perform the ice making process, and the high temperature refrigerant discharged from the compressor is made to flow into the cooler to perform the ice removing process. A cooling means for cooling the condenser, a condenser temperature detecting means for detecting the temperature of the condenser, a time limit means for accumulating a predetermined ice making time in the ice making step, and a control for controlling the operation of the condenser cooling means. Means for controlling the cooling of the condenser when the temperature of the condenser is low based on the output of the condenser temperature detecting means before the time when the ice making time by the timing means ends. Stop means An ice machine characterized by that.