JP3029601B2 - Vehicle refrigeration equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerating and refrigerating apparatus for lowering the inside of a freezer to a predetermined low temperature by using a refrigerant.
The present invention relates to a refrigerating and refrigerating apparatus used in a vehicle.

[0002]

2. Description of the Related Art Generally, there is a refrigerating car as a vehicle for transporting frozen foods, fresh foods, and the like. The freezer truck has a freezer for storing and freezing or chilling food and the like, and is equipped with a refrigerating device for keeping the freezer at a predetermined low temperature. FIG. 6 shows a schematic block diagram of a conventional vehicle refrigeration system.

As shown in FIG. 6, a vehicle refrigeration system includes a compressor 5 for compressing a refrigerant while an engine E of an automobile is operating, a compressor 7 for compressing a refrigerant while the engine E of the automobile is stopped, and a compressor 7. Driven motor M
And a heat exchanger 15 for condensing the refrigerant, and a heat exchanger 1
A heat exchanger 17 for evaporating the refrigerant condensed in 5 to cool the freezer 31; and blowers 19 and 21 for blowing air for heat exchange with the heat exchangers 15 and 17, respectively. And a control device 22 for controlling ON / OFF of the compressors 5 and 7 and the rotation speeds of the fans 19 and 21 for adjusting the temperature in the freezer 31. The compressor 5 receives power of the engine E via the clutch 9, and the compressor 7 receives power from the motor M. The power of the motor M is taken from a three-phase 200V commercial power supply. The blowers 19 and 21 are supplied from a commercial power supply via the AC / DC converter 10.
Alternatively, electric power is supplied from the battery B0.

In the vehicle refrigeration system configured as described above, the control valves 11a, 11b
Thus, a circulation path a is formed, and freezing in the freezer is performed in a refrigeration cycle indicated by the circulation path a. That is, in this case, the compression of the refrigerant is performed by the compressor 5.
At this time, the compressor 5 is driven by the engine E, and the rotation speed of the compressor 5 depends on the rotation of the engine E, so that stable operation of the refrigeration apparatus cannot be performed.

On the other hand, it is desirable to stop the engine E during loading / unloading or parking of the vehicle because of problems such as noise and exhaust gas, and stop the engine E when there is a commercial power supply in a parking place or the like. Therefore, the compressor 5 receiving power from the engine E cannot operate. For this reason, when the engine E is stopped, the circulation path b is formed by the control valves 11a and 11b, and the compressor 7 is used instead of the compressor 5. The compressor 7 is driven by a motor M, and power is supplied to the motor M from a three-phase 200 V commercial power supply. However, when there is no commercial power source, the refrigerating device is operated by the compressor 5 by operating the engine E.

[0006]

As described above, in the conventional vehicle refrigeration system, the running of the refrigeration system cannot be performed stably because the rotation speed of the compressor 5 depends on the rotation speed of the engine E during traveling. In addition, two compressors 5 and 7 are required to compress the refrigerant during traveling and during stopping, respectively, which has led to an increase in the size of the refrigeration system for vehicles and an increase in cost. When the vehicle is stopped, it is necessary to stop the engine due to problems such as environmental pollution. However, where there is no supply equipment for supplying three-phase 200V commercial power, the engine E is stopped for cooling even during the stop, and the engine E is idling. It has to be in a state, and there are problems such as exhaust gas, vibration and noise.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a vehicle refrigeration system that can be downsized and that reduces vibration and noise when the vehicle is stopped and cool. An object of the present invention is to provide a refrigerator.

[0008]

According to the present invention, there is provided a vehicle refrigeration apparatus including an electric compressor powered by a motor,
A refrigerating and refrigerating apparatus mounted on a vehicle and used for performing freezing or refrigeration using a refrigerant compressed by the electric compressor. The vehicle refrigeration apparatus includes a setting unit for performing a predetermined setting such as a temperature, a generator driven by the engine of the vehicle, a battery charged by the generator, and a commercial Power input means,
Control means for outputting a command for controlling the operation of the electric compressor based on the setting by the setting means; and electric power using at least one of a commercial power supply or the battery by the generator or the commercial power input means. And an electric power converter for converting the input electric power to electric power for driving the motor of the electric compressor based on a command from the control means, and supplying the electric power to the motor of the electric compressor.

[0009] The vehicle refrigerator may further include display means for displaying a power supply for supplying electric power to the electric compressor.

[0010] The vehicle refrigerator may further include charge control means for controlling continuation or stop of charging of the battery.

[0011] The vehicle refrigeration apparatus may further include a battery state notification means for warning when the battery is overdischarged or overcharged.

Further, in the above-described vehicle refrigeration apparatus,
Normally, switch means for electrically connecting the battery and a circuit to which the battery is connected, and for electrically disconnecting the battery from a circuit to which the battery is connected when the battery is overcharged or overdischarged May be provided. The battery is disconnected from the circuit to which it is connected and charging or discharging is prohibited.

At this time, in the battery state informing means and the switch means, the battery is in an overcharged state when the voltage of the battery is higher than a predetermined upper limit value, and the voltage of the battery is in a predetermined state. The battery may be in an overdischarged state when lower than the lower limit.

In the above refrigeration unit for a vehicle, the power converter includes a first rectifier circuit for converting an AC output from the generator into a DC, and an AC output from the commercial power by the commercial power input means. A rectifier circuit for converting the input DC into an AC, based on the control by the control means. In this case, the first rectifier circuit, the second rectifier circuit, and the battery are connected in parallel and input to the inverter unit.

[0015] In the above-mentioned vehicle refrigeration apparatus, the reactor may include a reactor connected in series with the second rectifier circuit. At this time, a series circuit of the reactor and the second rectifier circuit is connected in parallel with the first rectifier circuit. This reactor increases the power factor when using the commercial power supply as a power supply.

In the above refrigeration system for a vehicle, when the battery is used as a power source, the control means sets an upper limit value to at least one of a continuous operation time, a rotation speed, an operation current or an operation electric power for the electric compressor. May be provided.

In the above-described vehicle refrigeration apparatus, the control means sets an upper limit value of at least one of a rotation speed, an operating current, and an operating power for the electric compressor according to the type of the power supply. Is also good.

In the above refrigeration system for a vehicle, a power source determining means for determining which of the generator, the battery and the commercial power source is used as a power source, and Engine stop means for stopping the engine of the vehicle when a commercial power supply is used as a power supply may be provided. At this time, the power supply determining means may determine whether or not the generator is used as a power supply based on an output voltage of the generator or a frequency of the output voltage or a rotation speed of the engine. Alternatively, the power supply determining means may determine whether or not the commercial power supply is used as a power supply based on a voltage input to the commercial power supply.

In the above vehicle refrigerator, the electric compressor may be a hermetic electric compressor having a built-in motor.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a vehicle refrigeration system according to the present invention will be described with reference to the accompanying drawings.

The refrigeration system for a vehicle according to this embodiment includes a generator driven by an engine of the vehicle, a battery charged by the generator, and a commercial power supply input unit for receiving power from a commercial power supply. Is used as a power source to drive a compressor that compresses the refrigerant. The vehicle refrigeration system supplies power to the compressor from a generator when the vehicle is running, from a commercial power source when commercial power is available, and from a battery when commercial power is unavailable when the vehicle is stopped. Thus, the vehicle refrigeration apparatus can drive the compressor with the electric power from the battery even when the engine is stopped and power is not supplied from the commercial power supply, and can maintain the refrigeration or refrigeration function.

<Configuration of Refrigeration System for Vehicle> FIG. 1 is a block diagram of a refrigeration system for a vehicle according to the present embodiment. The vehicular refrigeration apparatus includes a compressor 13 for compressing the refrigerant, a heat exchanger 15 for condensing the refrigerant, and heat for cooling the freezer 31 by evaporating the refrigerant condensed in the heat exchanger 15. Exchanger 17, a generator G1 driven by an automobile engine E, a battery B1 charged by the generator G1, a commercial power input unit AC for inputting power from a commercial power source, a generator G1, a commercial power input A power converter 18 for converting power supplied from the unit AC or the battery B1 into desired power for driving the compressor 13;
Compressor 13 for adjusting the temperature inside freezer 31
And a control device 23 for controlling the rotation speed of the blowers 19 and 21 and an operation panel 25 for setting and displaying the temperature and the like.
And The compressor 13 is a hermetic electric compressor incorporating a motor 13m and a compression mechanism 13c. The commercial power supply is three-phase 200V AC. A switch SW for opening / closing the battery B1 based on the state of the battery B1 and electrically connecting or disconnecting the battery B1 to / from a circuit to which the battery B1 is connected is connected in series.

The vehicle refrigeration system includes blowers 19, 2
Battery B2, which is a driving power source for the first battery, a generator G2 driven by the engine E and charging the battery B2, and converts a voltage from the battery B1 to a predetermined voltage to charge the battery B2 when the engine E is stopped. A DC / DC converter 41 is provided. The input of the DC / DC converter 41 is connected to both ends (node a and node b) of a series circuit of the battery B1 and the switch SW.

The control device 23 is connected to an operation panel 25 and a temperature sensor 27 provided in the freezer 31, and transmits setting information set on the operation panel 25 and temperature information in the freezer 31. The control device 23 detects the output voltage of each of the generator G1, the commercial power input unit AC, and the battery B1. The control device 23 also detects an ignition pulse for controlling a spark plug (not shown) of the engine E, and thereby detects the state (the number of revolutions) of the engine E. Further, an antenna 29 is connected to the control device 23, and a remote operation can be performed on the control device 23 by radio or the like using a remote terminal instead of the operation panel 25.

The power converter 18 includes a rectifier circuit D1 for converting an AC output from the generator G1 to DC, a rectifier circuit D2 for converting the power of the commercial power supplied from the commercial power input AC to DC, and a rectifier circuit. D1, D2 or battery B
And an inverter circuit IV for receiving an output from the inverter 1 and converting it into electric power for driving the compressor 13. The rectifier circuit D1 and the rectifier circuit D2 are connected in parallel to the inverter circuit IV, and the battery B1 is also connected in parallel to the inverter circuit IV via the switch SW and the fuel gauge 57. The fuel gauge 57 is for detecting the remaining capacity of the battery B1, and is, for example, an integrated wattmeter.

FIG. 2 shows a detailed configuration of the power converter 18. The rectifier circuits D1 and D2 are configured by a diode bridge composed of three pairs of diodes. Inverter circuit IV includes switching elements Q1 to Q6 and switching elements Q1 to Q6 based on a control signal from control device 23.
To Q6 on / off.
The switching elements Q1 to Q6 are, for example, IGBTs (Insula
ted Gate Bipolar Transister). The inverter circuit IV includes a smoothing capacitor C for smoothing the output from the rectifier circuits D1 and D2, and a charging circuit 53 for charging the smoothing capacitor C. Power conversion device 18 has reactor L. Reactor L is connected in series to the low voltage side terminal of rectifier circuit D2 for commercial power supply, and is inserted so that the series circuit is parallel to rectifier circuit D1 for generator G1. The reason why the reactor L is inserted at such a position is to increase the power factor when the commercial power is used as a power source without affecting the case where the reactor L is supplied with power by the generator G1. is there. Further, the power conversion device 18 includes a current detection unit 55 that detects an operation current of the compressor 13, and an output thereof is input to the control device 23.

FIG. 3 is a diagram showing the operation panel 25.
The operation panel 25 includes a commercial power source, a generator G1, a battery B
1, a display 25a to 25c for displaying which one is used as a power supply, a switch 25d for turning on or off the operation of the vehicle refrigeration apparatus, and a freezer 31.
Display 25e for displaying the temperature and the set temperature, a temperature setting device 25f for setting the temperature of the freezer 31, a switch 25g for displaying the charging operation of the battery B1 and turning on / off the charging, An error notifier 25h for notifying by sound, buzzer or the like when it occurs.
Each display includes light emitting elements of various colors, and the displayed color may be different depending on the state. For example,
In the indicators 25a to 25c indicating the power supply, green may be displayed when the used power is indicated, and red may be displayed when the power supply is abnormal.

<Operation of Refrigeration System for Vehicle> The operation of the refrigeration system configured as described above will be described. In the following, for convenience of explanation, the battery B1 is in a normal state and the switch SW
Is described first as being closed. After that, specific opening / closing control of the switch SW will be described.

On the operation panel 25, switch 2 of the refrigeration system
When 5d is turned on, the control device 23
To detect the temperature in the freezer 31, and control the rotation speed of the compressor 13 so that the temperature in the freezer 31 becomes the temperature set by the temperature setting device 25f. That is,
The control device 23 outputs a rotation command for controlling the compressor 13 to the inverter circuit IV based on the detection value from the temperature sensor 27 and the set value on the operation panel 25. The control unit 51 of the inverter circuit IV controls the opening and closing of the switching elements Q1 to Q6 based on the rotation command, and the generator G converted to DC by the rectifier circuit D1.
The power from the power supply 1, the power from the commercial power supply converted to DC by the rectifier circuit D 2, or the power supplied from the battery B 1 is converted into desired power and supplied to the compressor 13. During operation of the vehicle refrigeration system, the battery B2 is charged by the generator G2 when the engine E is operating, and is charged by the battery B1 when the engine E is stopped.
It is charged via the / DC converter 41. The battery B2 supplies electric power for driving the blowers 19 and 21.

The switching of the power supply to the compressor 13 will be described below. First, a case where the vehicle is running, that is, the engine E is operating will be described. In this case, in the vehicle refrigeration system, the generator G1 is driven by the engine E, and the AC voltage generated by the generator G1 is input to the rectifier circuit D1. In the rectifier circuit D1, an AC voltage from the generator G1 is converted into a DC voltage and input to the inverter circuit IV. In the inverter circuit IV, the electric power from the rectifier circuit D1 is converted into desired electric power based on a rotation command from the control device 23, and is applied to the motor 13m of the compressor 13. At the same time, the battery B1 is charged with the power generated by the generator G1.

Next, consider the case where the vehicle is stopped, that is, the engine E is stopped. When commercial power (three-phase, 200 V) is supplied, the voltage supplied from the commercial power via the commercial power input AC is converted into a DC voltage in the rectifier circuit D2 and input to the inverter circuit IV. The inverter circuit IV converts the electric power input via the rectifier circuit D2 into desired electric power based on a rotation command from the control device 23 and applies the electric power to a desired motor 13m to drive the compressor 13. At the same time, the battery B
1 is charged with electric power from a commercial power supply.

When the electric power is not supplied from the commercial power supply while the engine E is stopped, the DC voltage from the battery B1 is input to the inverter circuit IV. The inverter circuit IV converts the electric power input from the battery B1 into the control device 2
The electric power is converted into a desired electric power based on the rotation command from the motor 3 and is applied to the motor 13m of the compressor to drive the compressor 13.

As described above, in the vehicle refrigeration system of the present embodiment, the generator G1, the commercial power supply (commercial power input section AC) and the battery B1 are connected in parallel to the inverter circuit IV. No means for switching the power supply of the compressor 1 is used, and one of these power supplies that applies a voltage to the inverter circuit IV is the compressor 1
3 is supplied as power to drive the inverter circuit IV. That is, while the engine E is operating and the generator G1 is generating power, the compressor 13 is driven by the power from the generator G1, and when the engine E is stopped and there is no power supply from the generator G1, Is connected, the compressor 13 is driven by electric power from the commercial power supply (commercial power input unit AC), and when no electric power is supplied from both the generator G1 and the commercial power supply, the compressor 13 is driven by the battery B1. I do. Therefore,
When the engine E is stopped, the vehicle refrigeration apparatus can be operated without depending on the commercial power supply. Also,
Since each power supply is input to the inverter circuit IV in parallel, it is possible to supply power from a plurality of power supplies, thereby improving the refrigeration capacity. For example, immediately after the refrigerating apparatus is started, the load on the compressor 13 is large,
In addition, when the engine E runs at a low speed and the power generation capacity is insufficient, power is automatically supplied from the battery B1.

In the vehicle refrigeration system of this embodiment,
In order to protect the compressor 13 and a circuit that controls the compressor 13 and prevent overdischarge of the battery B1, the compressor 13
The upper limit value is set for the rotation speed, operating current, operating power, etc. of the compressor 1 within a range not exceeding these upper limit values.
3 is to be driven. In particular, the vehicle refrigeration system of the present embodiment changes these upper limits in accordance with the type of power supply. In practice, the control device 23
From the detected value and the input voltage to the compressor 13,
The operating current and operating power of the compressor 13 are calculated, these values are compared with the set upper limits, and the switching of the switching elements Q1 to Q6 is controlled so that the operating current and operating power do not exceed those upper limits. Thus, the rotation command is output to the control unit 51.

Hereinafter, using the flowchart of FIG.
The process of setting the rotation speed of the compressor 13, the operating current, and the upper limit of the operating power will be described. Note that the following process starts with the activation of the vehicle refrigeration apparatus, and is repeatedly executed at predetermined timings while the vehicle refrigeration apparatus is operating.

As shown in FIG. 4, the control unit 23 determines whether the power supply for supplying power to the compressor 13 is the battery B1 (S1). Here, a method of determining the type of power supply will be described.

The control device 23 detects the output voltage of the generator G1 and the commercial power supply input section AC, and determines from which power is supplied to the inverter circuit IV. For example, when the voltage from generator G1 is higher than a predetermined value, control device 23 determines that power is being supplied by generator G1. Alternatively, when the frequency of the output voltage of the generator G1 is higher than a predetermined value, it is determined that the voltage is being supplied by the generator G1. Similarly, when the output voltage of commercial power input section AC is higher than a predetermined value (a predetermined value different from the predetermined value of generator G1), control device 23 determines that power is being supplied from the commercial power supply. When both the voltage from the generator G1 and the voltage from the commercial power input unit AC are lower than the respective predetermined values, the control device 23 determines that power is being supplied from the battery B1. Alternatively, the state (the number of revolutions) of the engine E may be detected, and when the engine E is stopped and the voltage from the commercial power input unit AC is low, it may be determined that the battery B1 is used as the power supply. At this time, the control device 23 displays on the operation panel 25 a power indicator 25a, 25b or 2 that is determined to be used as a power source.
5c is turned on.

If the result of determination in step S1 is that the power source is battery B1, an upper limit value for battery B1 is set (S4), and the routine returns.

Specifically, the upper limit of the operating power is set to 800
W or the upper limit of the operating current is set to 3.3 A, or the upper limit of the rotation speed is set to 3000 rpm. Further, in this case, the upper limit of the continuous operation time of the compressor is also set. That is, the time during which the battery B1 can be continuously operated after being used as a power source (for example, 30 minutes to 6 hours).
0 minutes). This is because the size, weight, cost, and the like of the battery B1 are limited because the battery B1 is mounted on a vehicle, so that the capacity is also limited. Therefore, in the vehicle refrigeration apparatus of the present embodiment, particularly when the battery B1 is used as a power source, the compressor can be driven within the limited capacity of the battery B1, not from the viewpoint of protection of the compressor or the like. As described above, the upper limit values of the operation time, the operation current, and the like are set. In this case, an upper limit may be set for at least one of the operation time, the operation current, and the like.

If the power source is not the battery B1, it is determined whether the power source is the generator G1 (S2). If the result of the determination is that the power source is the generator G1, an upper limit is set for the generator G1 (S5), and the routine returns. Specifically, the upper limit of the operating power is 2500 W, the upper limit of the operating current is 10.4 A, or the upper limit of the rotational speed is 90.
Set to 00 rpm.

If the power source is not the generator G1, it is determined whether the power source is a commercial power source (S3). If the result of the determination is that the power supply is a commercial power supply, the upper limit value for the case of the commercial power supply is set (S6), and the routine returns. Specifically, the upper limit of the operating power is 2000 W, the upper limit of the operating current is 8.3 A, or the upper limit of the rotational speed is 7000 r.
pm. As described above, the control device 23 changes the upper limit value such as the number of revolutions according to the type of the power supply. In this case, an upper limit may be set for at least one of the operating current, the operating power, and the like.

The charge / discharge control of the battery B1 (that is, the opening / closing control of the switch SW) for protecting the battery B1 from overcharge or overdischarge will be described below. The controller 23 determines the remaining amount of the battery B1 based on the output from the fuel gauge 57, and when the remaining amount is lower than the predetermined range, opens the switch SW so as to prohibit the discharge. Switch SW to prohibit charging when higher than
To release. Thereby, the life of the battery B1 can be extended. When the battery B1 is in the discharge prohibition state, the battery indicator 25c and the error indicator 25h on the operation panel 25 are turned on. When the battery B1 is in the charge prohibition state, the charge indicator 25g and the error indicator are turned on. By lighting 25h, the occupant is notified that the battery B1 is in the state of prohibition of discharging or charging.

The control device 23 may control the opening and closing of the switch SW as follows in order to protect the battery B1 from overcharge or overdischarge based on the voltage of the battery B1. That is, the control device 23 monitors the voltage of the battery B1, and normally closes the switch SW, but determines that the battery is overcharged when the voltage of the battery B1 becomes higher than a predetermined upper limit. Switch SW is opened to protect the switch. When the voltage of the battery B1 becomes lower than a predetermined lower limit, it is determined that the battery is overdischarged, and the switch SW is opened.

Further, the controller 23 monitors the output voltage of the commercial power supply input section AC, and when it is determined that power is supplied from the commercial power supply, an ignition circuit or the like connected to the engine E (see FIG. (Not shown), the engine E may be automatically stopped.

In the above description, the controller 23 detects the generator G1, the voltage of the commercial power supply (commercial power input AC) and the voltage of the battery B1, the remaining amount of the battery B1, etc. Although the setting of the upper limit of the power and the like and the control of the charging and discharging of the battery B1 are performed, these controls can also be performed by the control unit 51 of the power converter 18.
That is, as shown in FIG. 5, the voltage of the generator G1, the commercial power supply (commercial power input unit AC), and the battery B1 are sent to the control unit 51 of the power converter 18 by the voltage detection units 61, 63, and 65, respectively. Via the battery B1
By inputting the value detected for the remaining amount of
The control performed in step 3 can also be performed by the control unit 51.

As described above, the refrigeration system for a vehicle according to the present embodiment can provide a refrigeration or refrigeration function without operating the engine E even when commercial power is not supplied when the vehicle is stopped. Thereby, it is possible to cope with environmental problems such as noise and exhaust gas. Also, compressor 1
By using a hermetic electric compressor for 3, there is no leakage of refrigerant, and the effect on the environment can be reduced. Further, since freezing or refrigeration can be performed by only one compressor 13, weight and cost can be reduced and space can be saved as compared with a conventional compressor. Further, since the compressor 13 can be separated from the engine E, there is no influence of vibration and the like, and reliability, durability, and freedom of mounting position are increased. In addition, since the rotation of the compressor 13 is controlled by the inverter circuit IV, the compressor 13 can be operated without depending on the rotation speed of the engine E, so that the refrigeration apparatus can always be operated stably. Further, rapid temperature control is possible even immediately after the vehicle starts, and when the load of the refrigeration system is small, by controlling the capacity (rotational speed) of the compressor to be small, the problem of overcooling can be eliminated and power consumption can be prevented. Also,
Since there is no need to switch the circulation path of the refrigerant between when the vehicle is running and when the vehicle is stopped as in the related art, the compressor can be continuously operated without performing any special switching operation even when the running state changes to the stopped state.

[0047]

According to the vehicle refrigeration apparatus of the present invention,
Even when commercial power is not supplied when the vehicle is stopped, a refrigeration or refrigeration function can be provided without operating the engine. Thereby, it is possible to cope with environmental problems such as noise and exhaust gas. Also, by using a hermetic electric compressor for the compressor, there is no refrigerant leakage,
It can also respond to environmental issues. Furthermore, since freezing or refrigeration is performed by only one compressor, weight and cost can be reduced and space can be saved as compared with a conventional compressor.

Further, according to the vehicle refrigeration apparatus of the present invention, the power source supplying the electric power is displayed. This allows
The power source that supplies power to the electric compressor can be confirmed.

According to the vehicle refrigeration apparatus of the present invention, the continuation or stop of charging of the battery can be controlled, so that the durability of the battery can be increased.

Further, according to the vehicle refrigeration apparatus of the present invention, by further comprising a battery state notifying means,
You can know the state of the battery.

Further, according to the vehicle refrigeration apparatus of the present invention, when the battery is overcharged or overdischarged, the battery can be protected by disconnecting the battery from the peripheral circuit and prohibiting charging or discharging.

According to the vehicle refrigeration system of the present invention, the state of overcharge or overdischarge of the battery is detected by monitoring the voltage of the battery. The battery state can be confirmed and the battery can be protected based on the state thus detected.

Further, according to the vehicle refrigerator of the present invention, in the power converter, the first rectifier circuit for rectifying the power from the generator and the second rectifier circuit for rectifying the power from the commercial power supply. And the battery are input to the inverter unit in parallel. As a result, electric power output from any of the generator, the commercial power supply, and the battery is supplied to the electric compressor, so that a means for switching these power supplies is not required. Power can also be supplied.

Further, according to the vehicle refrigeration apparatus of the present invention, the reactor is connected in series with the second rectifier circuit for rectifying the power from the commercial power supply, and this series circuit is connected to the power converter by the power converter. It is connected in parallel with a first rectifier circuit for rectifying power. Thus, the reactor has no effect when the generator is used as the power supply, and increases the power factor when using the commercial power supply as the power supply.

According to the vehicle refrigeration apparatus of the present invention, when a battery is used as a power source, the upper limit is set to at least one of the continuous operation time, the number of revolutions, the operation current, and the operation power for the electric compressor. Set a value. Thus, the electric compressor can be driven even with a battery having a limited capacity.

Further, according to the vehicle refrigeration apparatus of the present invention, the control means sets the upper limit value of at least one of the rotation speed, the operating current, and the operating power for the electric compressor in accordance with the type of the power supply. Set. Thereby, the compressor can be suitably operated according to the capacity of the power supply.

Further, according to the vehicle refrigeration system of the present invention, it is determined which of a generator, a battery, and a commercial power supply is used as a power source, and based on the determination result,
The engine of the vehicle may be stopped when the power supply is a commercial power supply. Thus, when the commercial power supply is used as the power supply, the engine is automatically stopped, thereby realizing energy saving and pollution prevention.

Further, according to the vehicle refrigeration apparatus of the present invention, the electric compressor may be constituted by a hermetic electric compressor which does not leak refrigerant, and may be used for environmental problems such as ozone depletion and global warming. Can respond.

[Brief description of the drawings]

FIG. 1 is a block diagram of a vehicle refrigeration apparatus according to the present invention.

FIG. 2 is a block diagram showing details of a power converter.

FIG. 3 is a diagram showing an operation panel.

FIG. 4 is a flowchart showing a setting process of upper limit values of the number of times of operation of a compressor, an operating current, and the like.

FIG. 5 is a block diagram showing an example of a power converter different from FIG. 2;

FIG. 6 is a block diagram of a conventional vehicle refrigeration system.

[Explanation of symbols]

 Reference Signs List 13 Compressor 13m Compressor drive motor 18 Power conversion device 23 Control device 25 Operation panel 25a to 25h Display / switch AC commercial power input unit B1 Battery D1, D2 Rectifier circuit G1 Generator E Engine IV Inverter circuit L Reactor SW switch.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Norio Yoshida 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Inventor Minoru Fukumoto 1006 Odaka Kadoma Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. (72) Inventor Teruo Nakagawa 1006 Kadoma, Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Inventor Katsue Sasaki 3777, Kamikawa, Kamikawa, Kawachi-gun, Tochigi Pref. Inventor Nobuo Baba 3777, Kamikawa, Kamimikawa-cho, Kawachi-gun, Tochigi Pref.Tochigi Works (72) Inventor Kuri Tsuchiya 3-11 Senbon Midoricho, Numazu-shi, Shizuoka Pref.Toyodensan Co., Ltd. (56) References JP Hei 1-285756 (JP, A) Japanese Utility Model 4-75728 (JP, U) Japanese Utility Model 5-12216 (JP, U) Japanese Utility Model Hei 2-67864 (JP, U) Open flat 4-50389 (JP, U) (58 ) investigated the field (Int.Cl. ^7, DB name) F25D 11/00 - 16/00 F25D 29/00

Claims (14)

(57) [Claims] 1. A refrigerating and refrigerating apparatus mounted on a vehicle and provided with an electric compressor that uses a motor as a power source and performs freezing or refrigeration using a refrigerant compressed by the electric compressor. Setting means for performing the predetermined setting, a generator driven by the engine of the vehicle, a battery charged by the generator, a commercial power input means for taking in power from a commercial power supply, Based on the setting, control means for outputting a command for controlling the operation of the electric compressor, and the generator, the commercial power input means and the battery are directly connected in parallel, and the generator, the commercial power Power is input using at least one of the batteries as a power source, and the input power is used to drive a motor of the electric compressor based on a command from the control means. And a power converter that converts the power into a power and supplies the power to the motor of the electric compressor. In the power converter, one that outputs the highest voltage among the generator, the commercial power supply, and the battery is used as a power supply. A refrigeration device for a vehicle. 2. The refrigeration system for a vehicle according to claim 1, further comprising a charge control unit for setting stop or continuation of charging of said battery. 3. The vehicle refrigeration apparatus according to claim 1, further comprising a battery state notification unit that issues a warning when the battery is in an overcharged or overdischarged state. For refrigeration equipment. 4. The vehicle refrigeration apparatus according to claim 1, wherein the battery is normally electrically connected to a circuit to which the battery is connected, and the battery is in an overcharged or overdischarged state. A refrigeration unit for a vehicle, comprising: switch means for sometimes electrically disconnecting the battery from a circuit to which the battery is connected. 5. The vehicle refrigeration apparatus according to claim 3, wherein the battery is overcharged when the voltage of the battery is higher than a predetermined upper limit, and the voltage of the battery is a predetermined value. An over-discharge state when the lower limit value is lower than the lower limit of the vehicle. 6. The vehicle refrigeration apparatus according to claim 1, wherein the power converter includes a first rectifier circuit that converts an AC output from the generator into a DC, and a power supply from the commercial power input unit. A second rectifier circuit for converting an AC output into a direct current; and an inverter unit for converting the input direct current into an alternating current under the control of the control means, wherein the first rectifier circuit, the second rectifier circuit, A refrigeration unit for a vehicle, wherein the batteries are connected in parallel and input to the inverter unit. 7. The vehicle refrigeration apparatus according to claim 6, further comprising a reactor connected in series with the second rectifier circuit, wherein a series circuit of the reactor and the second rectifier circuit includes: A vehicle refrigeration unit connected in parallel with the first rectifier circuit. 8. A refrigerating and refrigerating apparatus mounted on a vehicle for use in a vehicle, comprising: an electric compressor that uses a motor as a power source, and performs freezing or refrigeration using a refrigerant compressed by the electric compressor. Setting means for performing the predetermined setting, a generator driven by the engine of the vehicle, a battery charged by the generator, a commercial power input means for taking in power from a commercial power supply, Based on the setting, control means for outputting a command for controlling the operation of the electric compressor, and inputting electric power using at least one of a commercial power supply or the battery by the generator or the commercial power input means, The input electric power is converted into electric power for driving the motor of the electric compressor based on a command from the control means, and supplied to the motor of the electric compressor. A refrigeration unit for a vehicle, comprising: a power conversion device; and a display unit that displays a power supply that supplies power to the electric compressor. 9. A refrigerating and refrigerating apparatus mounted on a vehicle and provided with an electric compressor that uses a motor as a power source and performs freezing or refrigeration using a refrigerant compressed by the electric compressor. Setting means for performing the predetermined setting, a generator driven by the engine of the vehicle, a battery charged by the generator, a commercial power input means for taking in power from a commercial power supply, Based on the setting, control means for outputting a command for controlling the operation of the electric compressor, and inputting electric power using at least one of a commercial power supply or the battery by the generator or the commercial power input means, The input electric power is converted into electric power for driving the motor of the electric compressor based on a command from the control means, and supplied to the motor of the electric compressor. A power conversion device, wherein the control means, when the battery is used as a power supply, a continuous operation time for the electric compressor, a rotation speed,
A refrigeration unit for a vehicle, wherein an upper limit value is provided for at least one of an operating current and an operating power. 10. A refrigerating and refrigerating apparatus mounted on a vehicle for use in a vehicle, comprising: an electric compressor that uses a motor as a power source, and performs freezing or refrigeration using a refrigerant compressed by the electric compressor. Setting means for performing the predetermined setting, a generator driven by the engine of the vehicle, a battery charged by the generator, a commercial power input means for taking in power from a commercial power supply, Based on the setting, control means for outputting a command for controlling the operation of the electric compressor, and inputting electric power using at least one of a commercial power supply or the battery by the generator or the commercial power input means, The input power is converted into power for driving the motor of the electric compressor based on a command from the control means, and supplied to the motor of the electric compressor. A vehicle, wherein the control means sets an upper limit value for at least one of a rotation speed, an operating current, and an operating power for the electric compressor in accordance with a type of the power supply. For refrigeration equipment. 11. A refrigerating and refrigerating apparatus mounted on a vehicle for use in a vehicle, wherein the refrigerating or refrigerating apparatus includes an electric compressor using a motor as a power source, and performs freezing or refrigeration using a refrigerant compressed by the electric compressor. Setting means for performing the predetermined setting, a generator driven by the engine of the vehicle, a battery charged by the generator, a commercial power input means for taking in power from a commercial power supply, Based on the setting, control means for outputting a command for controlling the operation of the electric compressor, and inputting electric power using at least one of a commercial power supply or the battery by the generator or the commercial power input means, The input power is converted into power for driving the motor of the electric compressor based on a command from the control means, and supplied to the motor of the electric compressor. A power conversion device, a power supply determining unit that determines which one of the generator, the battery, and the commercial power supply is used as a power supply, and a power supply based on the determination result from the power supply determining unit. And an engine stopping means for stopping the engine of the vehicle when used as a vehicle. 12. The vehicular refrigeration apparatus according to claim 11, wherein the power source determining unit is configured to control the power of the generator based on an output voltage of the generator or a frequency of the output voltage or a rotation speed of the engine. A refrigeration unit for a vehicle, which determines whether or not it is used as a vehicle. 13. The vehicle refrigeration apparatus according to claim 11, wherein the power source determining unit determines whether or not the commercial power source is used as a power source based on a voltage input to the commercial power source. A refrigeration unit for vehicles. 14. The vehicle refrigeration apparatus according to claim 1, wherein the electric compressor is a hermetic electric compressor having a built-in motor. Freezing and refrigeration equipment.