JPH0725579Y2 - Refrigeration equipment for land transportation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a refrigerating device such as a refrigerating vehicle for land transportation.

[Conventional technology]

FIG. 3 shows a conventional refrigerating apparatus which divides the inside of the freezer into two chambers and cools and refrigerates each chamber to each temperature. Third
In the figure, reference numeral 2 is a compressor which is driven by a dedicated or traveling engine 1, a commercial power source, or the like. 3 is a condenser, 4 is a blower for blowing outside air to the condenser 3, 9, 10
Is a two chamber formed by a partition wall 14 that branches from the condenser 3 and has solenoid valves 5 and 6 and expansion valves 7 and 8 interposed therebetween and partitions the interior of the freezer 13 by an evaporator connected in parallel, that is, the first chamber.
13a and 2nd chamber 13b, respectively. 11, 12 are blowers for sending air into the room corresponding to the evaporators 9 and 10, 17 and 18 are sensors for detecting the temperature in each room, and 22 is a control device for inputting signals from the sensors 17 and 18. It controls the solenoid valves 5 and 6 and the engine 1.

The high-temperature and high-pressure refrigerant gas discharged from the compressor 2 enters the condenser 3 and is condensed there by exchanging heat with the outside air sent by the blower 4 to become a liquid refrigerant.

Next, the liquid refrigerant is distributed and guided to the evaporators 9 and 10 through the solenoid valves 5 and 6 and the expansion valves 7 and 8 and is sent there by the blowers 11 and 12 in the first and second chambers 13a and 13b. By cooling the air, it vaporizes and becomes a refrigerant gas. Then, this refrigerant gas is merged and then sucked by the compressor 2 and compressed again.

Under the action of the refrigerant circuit, for example, when the temperature in the first chamber 13a reaches the upper limit temperature by a command from the control device 22, the solenoid valve 5 is opened to allow the refrigerant to flow through the evaporator 9 to perform the cooling operation. When the temperature is started and reaches the lower limit temperature, the solenoid valve 5 is closed, the refrigerant guided to the evaporator 9 is shut off, and the cooling operation is stopped.

With this, the room temperature is controlled.
The same temperature control as in the first chamber 13b is performed in the second chamber 13b.

Further, FIG. 4 shows another conventional example, in which a single evaporator 9 connected in series from a capacitor 3 is provided inside a freezer 13 in a first chamber 13b formed by a partition wall 14, The partition 14 is provided with the air in the first chamber 13a and the second chamber 13b.
A ventilation blower 23 is installed for sending the air inside. In FIG. 4, the same members as those in FIG. 3 are designated by the same reference numerals.

Thus, the control device 24 to which the signals from the respective sensors 17 and 18 are input
Command to start or stop the engine 1 in the first chamber 13a to start or stop the refrigeration system, and in the second chamber 13b to start or stop the ventilation blower 23 to control the respective room temperatures. Has become.

[Problems to be solved by the device]

The above-mentioned conventional refrigeration equipment for land transportation has the following problems to be solved.

That is, in the conventional refrigeration system shown in FIG. 3, each chamber 13a,
Since the evaporators 9 and 10 are provided for each 13b, the number of equipment is increased, and the number of construction steps of the refrigerant pipe connected to the evaporators 9 and 10 is increased, resulting in an increase in cost. Further, it is not easy to properly distribute the amount of the refrigerant flowing to each evaporator 9 and 10, and when one of the solenoid valves 5 (or 6) is closed, the refrigerant and the refrigeration in the evaporator 9 (or 10) are closed. Since the machine oil is accumulated, the amount of the refrigerant flowing in the refrigeration system is insufficient, and the amount of the refrigeration machine oil in the compressor 2 is also insufficient, so that the refrigeration system cannot operate smoothly and efficiently.

On the other hand, in the refrigerating apparatus shown in FIG.
As a result of giving priority to the temperature control in the first chamber 13a in which the second chamber 13a is arranged, the second chamber 13b is influenced by the indoor temperature of the first chamber 13a, so that the indoor temperature cannot be accurately controlled. However, there was a problem that the temperature could not be lowered.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a refrigerating apparatus that enables independent temperature control of a plurality of chambers by a single evaporator.

[Means for Solving the Problems]

Means for Solving the Problems The present invention provides a freezer having two or more chambers formed by movable partition walls, a single evaporator for cooling air in some or all of the chambers of the freezer, and an evaporator in the same as means for solving the above problems. A plurality of blowers that circulate and blow the air in the room, each independent ventilation path that guides air that is sucked from each room by each blower and passes through the evaporator and is blown into the same room, and each room A refrigeration apparatus for land transportation, comprising: a temperature detecting means disposed in the air conditioner; and a control device for inputting a signal from the temperature detecting means to start or stop the blower corresponding to the room. Is to provide.

[Action]

Since the present invention is constructed as described above, it has the following effects.

When the temperature in each room formed by partitioning the inside of the freezer reaches the set upper limit temperature, the temperature detecting means detects it and responds to the room by the command of the control device input the signal. The blower is activated and the cooling operation is started. When the room temperature reaches the set lower limit temperature, the temperature detecting means and the control device stop the blower corresponding to the room and the cooling operation is stopped.

Under the cooling operation, the air passages are independently formed for each blower, so that the air in the room sucked by the blower is cooled in the process of passing through the air passage and passing through the evaporator to become cool air, and this blower is used. It is blown out only in the room corresponding to. As a result, the inside of each room is not interfered with each other and the cooling operation is independently performed to control the room temperature.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a block diagram of a refrigerating apparatus according to this embodiment, and FIG. 2 is a schematic sectional view of the freezer. The same components as those of the conventional example are designated by the same reference numerals, and the description thereof will be omitted.

In both figures, the refrigeration system of the embodiment is driven by an engine 1 to compress a refrigerant gas to a high temperature and high pressure, a condenser 3 to condense and liquefy the refrigerant gas by blowing outside air by a blower 4, and an expansion to adiabatically expand the refrigerant liquid. The valve 7 and a single evaporator 9 that exchanges heat with the air in the freezer 13 to evaporate the refrigerant are sequentially connected. Freezer 13
Is provided with a partition wall 14 that can be fixed or movable to partition the inside of the compartment, and the partition wall 14 can be used to partition the first chamber 13a and the second chamber 13a.
A chamber 13b is formed. Further, an evaporator 9 is arranged above the first chamber 13a and the second chamber 13b above the freezer 13, and the blowers 11a, 11b for blowing the air in the chambers 13a, 13b to the evaporator 9. , 11c, 11d are provided in four units. Further, a partition plate 15 for partitioning between the blowers 11a to 11d and partitioning the flow of air passing through the evaporator 9 is attached, whereby the inside of the first chamber 13a (or the second chamber) via the blowers 11a to 11d. Ventilation paths 16a, 16b, 16c, 16d for the air that is sucked from (inside 13b) and passes through the evaporator 9 and is blown out into the inside of the first chamber 13a (or inside of the second chamber 13b) are the blowers 11a to 11a.
Each is formed independently in d. Reference numerals 17 and 18 denote sensors for detecting the respective room temperatures provided in the first chamber 13a and the second chamber 13b, and signals from these sensors 17 and 18 are control devices 20.
Is input to the blower 11 and the engine 1 is controlled to start or stop according to a command from the controller 20.

The temperature inside the first chamber 13a is controlled as follows. When the indoor temperature reaches the preset upper limit temperature, the blowers 11a and 11b corresponding to the first chamber 13a are activated by a command from the control device 20 and the cooling operation is started.
As a result, the air in the first chamber 13a is sucked by the blowers 11a and 11b, flows through the ventilation passages 16a and 16b, and is heat-exchanged and cooled in the process of passing through the evaporator 9 to become cold air.
The air is blown into the chamber 13a to cool the chamber. When the room temperature reaches the preset lower limit temperature, the control device
The blower 11a, 1 corresponding to the first chamber 13a by the command from 20
1b is stopped and the cooling operation is stopped. And blower 11
After the a and 11b are stopped, when the indoor temperature gradually rises due to the intrusion of heat from the outside into the first chamber 13a, the heat generated by the freezing object, etc., and the upper limit temperature is reached, the blowers 11a and 11b are restarted. . Also in the second chamber 13b, when the room temperature reaches the upper limit temperature and the lower limit temperature set independently for the room, respectively, a control device
According to the command of 20, the blower 11c, 1 as in the case of the first chamber 13a
1d is activated or deactivated to control the temperature.

Under the above cooling operation, since the ventilation paths 16a to 16d are independently formed for each of the blowers 11a to 11d, the blower 11
The air in the room sucked by a to 11 d is
The air flows through a to 16d and is blown out into the room corresponding to each of the blowers 11a to 11b.

Therefore, for example, the blowers 11a and 11b corresponding to the inside of the first chamber 13a do not blow the cold air into the second chamber 13b but blow only into the first chamber 13a, and as a result, the first chamber 13a and the second chamber 13b are separated from each other. They are not interfered with each other, and are independently and accurately controlled at an arbitrary temperature.

Next, the blowers 11a-1 corresponding to the first chamber 13a and the second chamber 13b
When all 1d are stopped, the engine 1 is stopped by the command of the control device 20 and the operation of the refrigeration system is stopped. After that, when at least one of the rooms reaches the upper limit temperature, the engine 1 is started, the operation of the refrigeration system is started, and at the same time, the blowers 11a to 11d corresponding to the room are started to perform the cooling operation.

Further, the partition wall 14 can be moved according to the capacity of the freezing object in each room, for example, by moving the partition wall 14 to the point a in FIG.
The sizes of the chamber 13a and the second chamber 13b can be changed. Also in this case, since the ventilation passages 16a to 16d are formed independently for each of the blowers 11a to 11d, the temperature control of each chamber is performed independently. The partition 14 can be moved to point B in FIG. 2 to form a chamber 13c for storing so-called dry cargo, which does not require cooling or freezing, and cold air is not blown into this chamber 13c. As described above, the refrigerating apparatus of this example has an advantage that the two chambers formed in the freezer 13 can be controlled at arbitrary temperatures by the single evaporator 9.

In this embodiment, the case where the inside of the freezer 13 is divided into two chambers by the partition wall 14 has been described, but the present invention is not limited to this, and two or more partition walls 14 may be provided to form a plurality of chambers. Also in that case, the temperature of each chamber is controlled independently of each other by the same operation as described above.

[Effect of device]

Since the present invention is configured as described above, it has the following effects.

That is, according to the refrigerating apparatus of the present invention, a freezer having two or more chambers formed by partition walls, a single evaporator for cooling the air in the freezer, and a plurality of blowers for blowing air to the evaporator are provided. Since each blower has an independent ventilation path and a control device for starting or stopping the blower corresponding to the temperature condition in each room is provided, the air in each room does not interfere with each other Since it is cooled to 2, the temperature of each of the two or more chambers can be controlled to an arbitrary temperature with a single evaporator.

Also, since only one evaporator is used, construction costs,
Plumbing costs are low.

In addition, the problem of imbalance in the amount of refrigerant, the amount of oil, etc. that occurs when using a plurality of evaporators is eliminated.

[Brief description of drawings]

FIG. 1 is a block diagram of a refrigerating apparatus for land transportation according to an embodiment of the present invention, FIG. 2 is a schematic sectional view of a freezer used in the above embodiment, and FIG. 3 is a block diagram of a conventional refrigerating apparatus for land transportation. , 4th
FIG. 1 is a configuration diagram showing another conventional refrigeration system. 9 ... Evaporator, 11a, 11b, 11c, 11d ... Blower, 13 ...
… Freezer, 13a …… 1st chamber, 13b …… 2nd chamber, 14 …… Partition wall, 15
...... Partition plates, 16a, 16b, 16c, 16d …… Ventilation path, 17, 18 …… Sensor (temperature detection means) 20 …… Control device.

Claims (1)

[Scope of utility model registration request] 1. A freezer having two or more chambers formed by movable partition walls, a single evaporator for cooling the air in a part or all of the chambers of the freezer, and an air inside the chamber for the evaporator. A plurality of blowers that circulate, and each independent ventilation path that guides the air that is sucked from each room by each blower and passes through the evaporator and is blown into the same room, and is installed in each room. A refrigerating apparatus for land transportation, comprising: a temperature detecting means; and a control device for inputting a signal from the temperature detecting means to start or stop the corresponding blower in the room.