JPH10311612A - Refrigerating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an increase in oil temperature to improve the reliability of a compressor, and to reduce the frequent stops of a refrigerating device by controlling a condenser fan by the signal from an oil temperature detector and the signal from a refrigerant temperature detector. SOLUTION: A fan controller 14 receives the signal from an oil temperature thermister and the signal from a condenser thermister 12 which is a refrigerant temperature detector to control the operation of a condenser fan 13. When the oil temperature of a compressor 2 exceeds the preset upper limit, the operation of a refrigerator 1 is stopped by an oil temperature thermister 9 and the fan controller 14. When the oil temperature detected by the oil temperature thermister 9 exceeds 85 deg.C, the signal to indicate that the oil temperature is abnormally high is transmitted to a refrigerating device controller 10 to forcibly stop the refrigerator 1. When the oil temperature is dropped to 75 deg.C or under, the operation of the refrigerator 1 is re-started, and the condenser fan 13 is normally controlled by the detected signal of the condenser thermister 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerating apparatus, and more particularly to a refrigerating apparatus that prevents a rise in oil temperature in a compressor of a refrigerator and ensures stable operation.

[0002]

2. Description of the Related Art FIG. 3 is a view showing the configuration of a conventional refrigeration system, in which a refrigerator having a compressor and a condenser, an expansion valve,
It is a figure explaining a refrigeration cycle provided with a cooler. FIG.
Wherein 1 is a refrigerator main body, 2 is a compressor for compressing a refrigerant, 3 is a condenser for condensing the refrigerant compressed by the compressor 2,
4 is an expansion valve for expanding the condensed liquid refrigerant, 5 is an expansion valve 4
This is a cooler that evaporates the refrigerant that has passed through.

[0003] Reference numeral 6 denotes a liquid reservoir for temporarily storing the refrigerant liquefied by the condenser before sending it to the expansion valve 4, and for taking the refrigerant in and out in response to a change in load of the cooler 5. Reference numeral 7 denotes a bypass passage (injection pipe) connected from the lower part of the liquid reservoir 6 to the compressor 2.
A pipe for injecting the liquid refrigerant taken out of the liquid reservoir 6 into the compressor 2.

[0004] The refrigerator 1 is surrounded by a machine room panel 8, and has a compressor 2, a condenser 3 and a liquid reservoir 6 in the enclosed box. Further, an expansion valve 4 and a cooler 5 are provided outside the refrigerator 1 to constitute a refrigerator. The refrigerant includes a compressor 2, a condenser 3, a liquid reservoir 6, an expansion valve 4, and a cooler 5.
And these are connected by piping to form a refrigerant cycle.

Further, in FIG. 3, reference numeral 9 denotes an oil temperature thermistor built in the compressor 2 for detecting the oil temperature in the compressor 2. Reference numeral 10 denotes a refrigeration system controller for controlling the operation of the refrigeration system, and reference numeral 11 denotes a liquid back controller.
The oil temperature thermistor 9 is connected to the liquid bag controller 11 by a signal line 11a, and the liquid bag controller 11 is connected to the refrigerator controller 10 by a signal line 11b.

In the conventional oil temperature control in the compressor 2, when the oil temperature reaches a predetermined low or high temperature, the refrigerator 1 is usually stopped. Compressor 2 with refrigerant in liquid state
When the liquid-back state is reached, the oil temperature decreases. At this time, the refrigerant that has returned into the compressor 2 is compressed and generates excessive pressure, which causes a failure of the compressor 2. In order to prevent this, when the oil temperature detected by the oil temperature thermistor 9 is lower than a predetermined temperature, the liquid back controller 11 determines that liquid back is occurring, and sends a signal to the refrigeration system controller 10. Then, the refrigerator 1 is stopped. Then, when the oil temperature rises and the temperature detected by the oil temperature thermistor 9 becomes normal temperature,
The liquid back controller 11 determines that the liquid back state has ended, sends a signal to the refrigeration apparatus controller 10, and operates the refrigerator 1 again. This is control when the oil temperature is low.

On the other hand, when the operation of the compressor 2 is in an overload state, and when the oil remaining in the refrigeration system piping returns to the compressor 2 and the oil holding amount becomes excessive, The oil temperature and the temperature of the motor winding rise and cause a failure of the compressor 2. Therefore, when the temperature detected by the oil temperature thermistor 9 for protecting the compressor 2 is higher than a predetermined temperature, a signal is sent to the refrigeration system controller 10 and the chiller 1
Is to be stopped. This is control when the oil temperature is high. These controls are aimed at protecting the compressor 2.

Next, in FIG. 3, reference numeral 12 denotes a condenser thermistor for detecting the condensation temperature of the condenser 3. And 1
Reference numeral 3 denotes a condenser fan that blows air to the condenser 3 to improve the condensation performance, and 14 denotes a fan controller that controls the rotation speed of the condenser fan 13. 12a is a signal line for transmitting a signal from the condenser thermistor 12 to the fan controller 14, and 13a is a control line for controlling the condenser fan 13 by the fan controller 14. Also, 12b is
The signal from the condenser thermistor 12 is sent to the refrigeration system controller 10
Signal line. The condenser thermistor 12 is provided on the inlet pipe of the condenser 3 and detects the temperature of the condenser 3. Based on the condensation temperature detected by the condenser thermistor 12, the fan controller 14 determines the condensation load,
The number of rotations of the condenser fan 13 is controlled in accordance with the condensation load. Depending on the season, it can be used in low, medium and high speed modes. Now, when the condensing temperature rises, the rotational speed of the condenser fan 13 increases, and conversely, when the condensing temperature is low, the rotational speed decreases. As an example, in the case of the medium speed mode, the condenser fan 13 is set to 500 r for a condensation temperature of 23 to 53 ° C.
Rotate at pm-1200 rpm.

The control by the fan controller 14 operates the condenser fan 13 at a minimum necessary number of revolutions corresponding to the condensing load so as to reduce the condenser fan 13 and noise generated therefrom. Further, when the condensing temperature becomes high, the condenser fan 13 is rotated at the predetermined full speed of 1200 rpm in order to lower the condensing temperature.
When the condensing temperature and pressure rise and reach a predetermined pressure value set for safety, the refrigerator 1 is stopped.

In FIG. 3, when the load is high during operation of the compressor 2, the temperature and pressure of the refrigerant gas after compression tend to increase. When the temperature of the refrigerant gas discharged from the compressor 2 increases, the pressure of the condenser 3 increases. Therefore, when the pressure increases to the set pressure, the refrigerator 1 is stopped. For this reason, the injection is performed by bypassing the injection pipe 7 from the lower part of the liquid reservoir 6 to the compressor 2. Then, the refrigerant gas is cooled so as not to exceed the set pressure of the condenser 3. This injection control does not directly control the oil temperature in the compressor 2 and the temperature of the motor winding. Therefore, when the oil temperature becomes higher than the predetermined temperature, the refrigerator 1 is stopped.

[0011]

The above-described refrigerator has a structure in which it is surrounded by a machine room panel 12 in order to reduce noise generated from the compressor 2. The compressor 2 is installed in the machine room, and the compressor 2 generates heat.
However, this heat easily accumulates in the machine room, and the temperature in the machine room tends to increase. Under the influence, the oil temperature inside the compressor 2 and the temperature of the motor winding tend to increase, which causes a failure of the compressor 2. Therefore, in order to protect the compressor 2, an upper limit of the oil temperature in the compressor 2 is determined, the temperature is set to, for example, 85 ° C., and control is performed to stop the compressor 2 when the temperature exceeds this temperature. However, there has been a problem that the refrigerator 1 is stopped every time the oil temperature exceeds the upper limit.

The increase in the condensation temperature in the condenser 3 and the increase in the oil temperature in the compressor 2 are in a proportional relationship. However, when the compressor 2 is in an environment where the oil temperature tends to increase, the normal condensation temperature and the oil temperature From the relationship, the oil temperature rises significantly. In order to prevent this oil temperature rise, for example, the fan controller 14
It is conceivable to increase the rotation speed of the condenser fan 13 to slightly lower the condensing temperature and thereby control the oil temperature, but as described above, the condensing temperature is controlled by the compressor 2.
Since it is performed separately from the oil temperature, it cannot be related to the control of the oil temperature. Further, the injection control is performed to prevent a rise in the discharge gas temperature of the compressor 2 and is controlled separately from the oil temperature as described above, and therefore can be related to the control of the oil temperature. Did not.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to prevent the oil temperature from rising, thereby improving the reliability of a compressor, and reducing frequent stoppages of a refrigeration system. .

[0014]

The refrigerating apparatus of the present invention comprises:
A refrigerant cycle including a compressor and a condenser; a condenser fan for cooling the condenser; an oil temperature detector for detecting an oil temperature of the compressor; and a refrigerant temperature detection for detecting a refrigerant temperature entering the condenser. And a condenser fan is controlled by a signal from the oil temperature detector and a signal from the refrigerant temperature detector.

Further, in the refrigeration apparatus according to the present invention, a signal from the oil temperature detector is provided until the temperature detected by the oil temperature detector exceeds a first predetermined temperature and falls below a second predetermined temperature. By controlling the condenser fan, until the temperature detected by the oil temperature detector falls below the second predetermined temperature until it exceeds the first predetermined temperature, by the signal from the refrigerant temperature detector The condenser fan is controlled.

Further, the refrigerating apparatus of the present invention further includes a machine room for storing at least the compressor and the condenser, and a ventilation fan for ventilating the machine room, and a signal from the oil temperature detector. The ventilation fan is controlled by the following. Further, the refrigeration apparatus of the present invention is characterized in that the condenser fan and the ventilation fan are controlled by a signal from the oil temperature detector and a signal from the refrigerant temperature detector.

Further, the refrigerating apparatus of the present invention further comprises a liquid reservoir of the condenser, and a bypass which can control a flow from the liquid reservoir to a suction side of the compressor. Injection to the compressor is controlled by a signal. Further, the refrigeration apparatus of the present invention performs the injection when the temperature detected by the oil temperature detector reaches a predetermined temperature, and stops the injection when the temperature detected by the oil temperature detector reaches another predetermined temperature. It is characterized by doing so.

Further, the refrigerating apparatus of the present invention has a refrigerant cycle including a compressor and a condenser, an oil temperature detector for detecting an oil temperature of the compressor, and a machine for storing at least the compressor and the condenser. And a ventilation fan for ventilating the machine room, wherein the ventilation fan is controlled by a signal from the oil temperature detector. Also, the refrigeration apparatus of the present invention includes a refrigerant cycle including a compressor, a condenser, and a liquid reservoir of the condenser, an oil temperature detector for detecting an oil temperature of the compressor, and A bypass that can control the flow to the suction side of the container,
The injection from the reservoir to the compressor is controlled by a signal from the oil temperature detector. Further, the refrigeration apparatus of the present invention performs the injection when the detected temperature of the oil temperature detector reaches a predetermined temperature, and performs the injection when the detected temperature of the oil temperature detector reaches another predetermined temperature. It is characterized in that it is stopped.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. Note that the same reference numerals as those in FIG. 3 described as the related art indicate the same or corresponding parts. Embodiment 1 FIG. 1 and 2 are diagrams showing Embodiments 1 to 3 of the present invention together. FIG. 1 is a diagram showing a configuration of a refrigeration apparatus, and FIG. 2 is a flowchart showing control of the refrigeration apparatus. In FIG. 1, 1 is a refrigerator as a main body of the refrigerator,
2 is a compressor, 3 is a condenser, 4 is an expansion valve, 5 is a cooler, 6
Is a liquid reservoir, and 7 is a bypass pipe. The refrigerator 1 stores a compressor 2, a condenser 3, a liquid reservoir 6, and the like in a machine room surrounded by a machine room panel 8. Further, an expansion valve 4 and a cooler 5 are provided outside the refrigerator 1 to constitute a refrigerator. Then, the compressor 2, the condenser 3, the liquid reservoir 6, the expansion valve 4, and the cooler 5
Constitute a refrigerant cycle.

Reference numeral 9 denotes an oil temperature detector for detecting the oil temperature in the compressor 2, and more specifically, an oil temperature thermistor. 1
Reference numeral 0 denotes a refrigeration system controller for controlling the operation of the entire refrigeration system, and reference numeral 11 denotes a liquid back controller. 11a is a signal line connecting the oil temperature thermistor 9 and the liquid back controller 11, and 11b is a signal line connecting the liquid back controller 11 and the refrigeration system controller 10.

Reference numeral 12 denotes a refrigerant temperature detector for detecting the temperature of the refrigerant entering the condenser 3, and more specifically, a condenser thermistor. 13 is a condenser fan, and 14 is a fan controller for controlling the condenser fan 13. The condenser thermistor 12 and the fan controller 14 are connected by a signal line 12a, and the fan controller 14 and the condenser fan 13 are connected by a control line 13a. Also,
The condenser thermistor 12 and the refrigeration system controller 10 are connected by a signal line 12b. The above configuration is the same as the conventional one, and the operation of this part is the same as the conventional one.
Detailed description is omitted.

Next, the characteristic portion of the first embodiment will be described. 9a is a signal line newly provided for transmitting a signal from the oil temperature thermistor 9 to the fan controller 14. The fan controller 14 differs from the conventional one in that it receives a signal from the oil temperature thermistor 9. The fan controller 14 is configured to control the operation of the condenser fan 13 in response to a signal from the oil temperature thermistor and a signal from the condenser thermistor 12.

FIG. 2 is a flowchart showing the control of the oil temperature by the oil temperature thermistor 9 and the fan controller 14. First, if the oil temperature of the compressor 2 exceeds the set upper limit, the operation of the refrigerator 1 is stopped as in the conventional case.
In the flowchart of FIG. 2, steps 4 to 7 correspond to this state. In order to maintain the reliability of the compressor 2, the oil temperature detected by the oil temperature thermistor 9 sets the upper limit of the oil temperature to, for example, 85 ° C. If the oil temperature exceeds this temperature (step 4 in FIG. 2), the same as the conventional control is performed. Then, a signal indicating that the oil temperature is high and abnormal is sent to the refrigeration system controller 10, and the chiller 1 is forcibly stopped (step 5 in FIG. 2). Then, when the oil temperature drops to 75 ° C. or lower after the stop (Step 6 in FIG. 2), the operation of the refrigerator 1 is restarted, and the condenser fan 13 is controlled normally by the detection of the condenser thermistor 12 (FIG. Step 7 of 2).

However, in this embodiment, the following control is performed in order to avoid such an increase in the oil temperature and the accompanying shutdown of the refrigerator 1. In the flowchart of FIG. 2, steps 1 to 3 and 8 correspond to this. First, the oil temperature of the compressor 2 is detected by the oil temperature thermistor 9 for the purpose of preventing the refrigerator 1 from stopping due to an increase in the oil temperature of the compressor 2 (Step 1 in FIG. 2).

When the oil temperature reaches a first predetermined temperature, for example, 80 ° C. (step 2 in FIG. 2), the condenser fan 13 is operated at full speed (step 3 in FIG. 2). In this case, the oil temperature is 80
℃ until controlled by the condenser thermistor 12,
Even if the condenser fan 13 is under normal rotation speed control,
When the oil temperature exceeds 80 ° C., a signal from the oil temperature thermistor 9 is received, a signal is sent from the fan controller 14, and the condenser fan 13 is set to rotate at full speed. This prevents an increase in oil temperature due to an increase in condensation temperature. The condensation temperature and the pressure drop due to the full-speed rotation of the condenser fan 13 are small, and the effects on the refrigeration cycle are small because of the short time.

Next, when the oil temperature detected by the oil temperature thermistor 9 drops to a second predetermined temperature, for example, 75 ° C. (step 8 in FIG. 2), this control is released and the normal condenser thermistor 12 The process returns to the control of the fan controller 14 (Step 7 in FIG. 2). As described above, according to the refrigeration apparatus of this embodiment, when the oil temperature of the compressor 2 rises, the oil temperature can be controlled by controlling the condensation temperature of the refrigerant in the condenser 3. Became. That is, it is possible to prevent the oil temperature from rising, improve the reliability of the compressor 2, and reduce the frequent stoppage of the refrigeration system.

Embodiment 2 FIG. Embodiment 2 of the present invention
Are also shown in FIG. The features of the second embodiment will be described. In FIG. 1, 15 is a refrigerator 1
Machine room ventilation fan 1 attached to machine room panel 8
5 is shown. A control line 15 a controls the machine room ventilation fan 15 by the fan controller 14. The compressor 2 is placed in the machine room, and the heat generated from the compressor 2 raises the temperature in the machine room and further raises the oil temperature in the compressor 2. Therefore, in order to prevent the oil temperature from rising, the condenser fan 13 and the machine room ventilation fan 15 are individually controlled by a signal sent from the fan controller 14 to perform a blowing operation.

In this control, the machine room temperature is set to a predetermined temperature, for example, such that the oil temperature detected by the oil temperature thermistor 9 does not exceed the set upper limit, for example, 85 ° C. described in the first embodiment. When the temperature exceeds 60 ° C., the heat inside the machine room is exhausted. Now, when the temperature in the machine room exceeds 60 ° C., a signal is sent from the fan controller 14 to rotate the machine room ventilation fan 15 to discharge heat from the machine room. When the temperature in the machine room falls below the set value, the machine room ventilation fan 15 is stopped.

When the temperature rise in the machine room rises in a short time and the oil temperature rises remarkably, the machine room ventilation fan 15 continues to operate, and when the oil temperature reaches 80 ° C., the condenser fan 13 also rotates. In addition, the temperature in the machine room and the oil temperature can be reduced. Furthermore, in an environment where the temperature in the machine room is always high and the oil temperature is likely to rise, the machine room ventilation fan 15 may be set to rotate constantly to lower the temperature in the machine room. As described above, according to this embodiment, it is possible to suppress a rise in the temperature inside the machine room, and thereby suppress a rise in the oil temperature of the compressor 2.

Embodiment 3 Embodiment 3 of the present invention
Are also shown in FIG. The features of the third embodiment will be described. In FIG. 1, 16 is a solenoid valve, 1
Reference numeral 7 denotes a bypass passage (injection piping) that communicates with the suction piping of the compressor 2 from the lower part of the liquid reservoir 7 through the electromagnetic valve 16.
It is. Reference numeral 17a denotes a control line for controlling the opening and closing of the solenoid valve 17 by a signal from the refrigeration system controller 10.

When the oil temperature exceeds a predetermined upper limit temperature of 80 ° C., a signal is sent from the oil temperature thermistor 9 to the refrigeration system controller 10. The refrigeration system controller 10 includes:
A control signal is sent to the solenoid valve 16 to open the solenoid valve 16. As a result, the refrigerant liquid flows from the liquid reservoir 6 through the pipe 17 and
Flows into the suction pipe of the, and performs injection. As a result, the intake gas temperature of the compressor 2 decreases, and the oil temperature and the winding temperature also decrease. When the temperature detected by the oil temperature thermistor 9 drops to another predetermined temperature, the injection is stopped.

In the conventional injection control, the compressor 2
The first object is to lower the discharge gas temperature. At this time, since the oil temperature and the winding were not directly cooled in the compressor 2, these temperature controls could not be directly performed.
However, according to this embodiment, injection can be performed for controlling the oil temperature in the compressor 2 and the winding temperature. Thus, the oil temperature detected by the oil temperature thermistor 9 can be controlled so as not to exceed 85 ° C., which is the upper limit for maintaining the reliability of the compressor 2.

The operation of the bypass pipe 7 is the same as the conventional one. That is, when the operating load of the compressor 2 increases and the temperature of the condenser 3 increases, and the pressure thereof increases, the liquid
Liquid refrigerant is injected into the compressor 2 from below, and the refrigerant gas is cooled so that the condenser 3 does not exceed the set pressure.

Embodiments 1 to 3 of the present invention described above
Have a common purpose of preventing an increase in the oil temperature of the compressor 2 and ensuring a stable operation of the refrigerator 1. Therefore, when the means of these embodiments are operated in combination, the effect is further enhanced. First, if the injection control of the liquid refrigerant and the control of the condenser fan 13 are simultaneously performed, the effect is enhanced. Further, when the control of the machine room fan 15 and the above-described injection control are combined, the effect is enhanced. Further, when the control of the condenser fan 13, the control of the machine room fan 15, and the injection control are combined at the same time, the effect is further enhanced.

[0035]

As described above, according to the present invention, since the condenser fan is controlled by detecting the oil temperature of the compressor, the condensing temperature can be appropriately controlled in response to an increase in the oil temperature. As a result, a refrigeration apparatus that prevents an increase in oil temperature can be obtained. Also,
According to the present invention, when the detected oil temperature increases, the condenser fan is controlled by the signal from the oil temperature detector, and when the detected oil temperature decreases, the condenser fan is controlled by the refrigerant temperature. Since the control is performed, it is possible to obtain a refrigerating apparatus that prevents an increase in oil temperature, prevents a compressor from malfunctioning, and reduces the number of times that the refrigerator stops.

Further, according to the present invention, since a ventilation fan is provided in the machine room storing the compressor and the condenser, a refrigerating apparatus having an additional effect of preventing an increase in oil temperature by ventilation can be obtained. Further, according to the present invention, since both the condenser fan and the ventilation fan are controlled by the signal from the oil temperature detector and the signal from the refrigerant temperature detector, the rise in the oil temperature is more effectively prevented. Thus, a refrigeration apparatus that can be used is obtained.

Further, according to the present invention, a bypass is provided from the liquid reservoir of the condenser to the suction side of the compressor so that the liquid refrigerant is injected into the compressor when the oil temperature rises. Thus, a refrigeration apparatus that can further prevent an increase in oil temperature can be obtained. Further, according to the present invention, since the injection of the liquid refrigerant is controlled in accordance with the temperature detected by the oil temperature detector, a refrigeration apparatus that can more effectively prevent the oil temperature from rising can be obtained. .

Further, according to the present invention, a ventilation fan is provided in the machine room storing the compressor and the condenser, and the ventilation fan is independently controlled by a signal from the oil temperature detector. A refrigeration apparatus that can prevent an increase in oil temperature by ventilation can be obtained. Further, according to the present invention, a bypass which can control the flow from the liquid reservoir of the condenser to the suction side of the compressor is provided, and the injection of the liquid refrigerant to the compressor is controlled by a signal from the oil temperature detector. Because it was
A refrigeration apparatus capable of preventing an increase in oil temperature by injection is obtained.

Further, according to the present invention, the injection of the liquid refrigerant is controlled in accordance with the temperature detected by the oil temperature detector, so that the refrigeration can further effectively prevent the oil temperature from rising even by the injection alone. A device is obtained. Thus, according to the present invention, it is possible to provide a highly reliable refrigeration apparatus that can be used by a user with peace of mind.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a refrigeration apparatus according to Embodiments 1 to 3 of the present invention.

FIG. 2 is a flowchart for explaining an operation of oil temperature control of a compressor in the refrigeration apparatus according to Embodiment 1 of the present invention.

FIG. 3 is a diagram showing a configuration of a conventional refrigeration apparatus.

[Explanation of symbols]

1 refrigerator, 2 compressor, 3 condenser, 4 expansion valve, 5
Cooler, 6 reservoir, 7 bypass (injection pipe), 8 machine room panel, 9 oil temperature detector (oil temperature thermistor), 10 refrigeration system controller, 11 liquid back controller, 12 condensation temperature detector (condenser) Thermistor), 13 condenser fan, 14 fan controller, 15 machine room ventilation fan, 16 solenoid valve, 17 bypass line (injection piping).

Claims (9)

[Claims] 1. A refrigerant cycle including a compressor and a condenser, a condenser fan for cooling the condenser, an oil temperature detector for detecting an oil temperature of the compressor, and a refrigerant temperature entering the condenser. A refrigeration apparatus comprising: a refrigerant temperature detector for detecting; and controlling the condenser fan based on a signal from the oil temperature detector and a signal from the refrigerant temperature detector. 2. The condenser fan is controlled by a signal from the oil temperature detector until the temperature detected by the oil temperature detector exceeds a first predetermined temperature and falls below a second predetermined temperature. The condenser fan is controlled by a signal from the refrigerant temperature detector until the temperature detected by the oil temperature detector falls below the second predetermined temperature and exceeds the first predetermined temperature. 2. The method according to claim 1, wherein
A refrigeration apparatus according to claim 1. 3. A machine room for storing at least the compressor and the condenser, and a ventilation fan for ventilating the machine room, wherein the ventilation fan is controlled by a signal from the oil temperature detector. The refrigeration apparatus according to claim 1 or 2, wherein the refrigeration system is configured as described above. 4. The refrigeration apparatus according to claim 3, wherein the condenser fan and the ventilation fan are controlled by a signal from the oil temperature detector and a signal from the refrigerant temperature detector. 5. A compressor according to claim 1, further comprising a liquid reservoir of said condenser, and a bypass passage capable of controlling a flow from said liquid reservoir to a suction side of said compressor, wherein a signal from said oil temperature detector is supplied to said compressor. The refrigeration apparatus according to any one of claims 1 to 4, wherein the injection is controlled. 6. The injection is performed when the temperature detected by the oil temperature detector reaches a predetermined temperature, and the injection is stopped when the temperature detected by the oil temperature detector reaches another predetermined temperature. The refrigeration apparatus according to claim 5, wherein: 7. A refrigerant cycle including a compressor and a condenser, an oil temperature detector for detecting an oil temperature of the compressor, a machine room for storing at least the compressor and the condenser, and A refrigerating apparatus, comprising: a ventilation fan for performing ventilation; and controlling the ventilation fan based on a signal from the oil temperature detector. 8. A refrigerant cycle including a compressor, a condenser and a reservoir of the condenser, an oil temperature detector for detecting an oil temperature of the compressor, and a suction side of the compressor from the reservoir. A refrigerating apparatus, comprising: a bypass passage capable of controlling flow to the compressor; and controlling injection from the liquid reservoir to the compressor by a signal from the oil temperature detector. 9. The injection is performed when the temperature detected by the oil temperature detector reaches a predetermined temperature, and the injection is stopped when the temperature detected by the oil temperature detector reaches another predetermined temperature. The refrigeration apparatus according to claim 8, wherein