JPS6124622B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is capable of transporting and storing frozen foods at the same time as air conditioning, or the freezer can be removed and transported to another location, such as a fishing boat, and the freezer is equipped with a regenerator. The objective is to provide a completely new and innovative portable refrigerated storage that can be used separately from the air conditioning system to maintain appropriate freezing and refrigeration temperatures without special replenishment of ice, etc. An embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

Reference numeral 1 denotes a shaft that is appropriately connected to a prime mover and a clutch (not shown), and includes a rotor 2 having the function of a cooling pump, and a first rotor 4 and a second rotor 5 of a two-stage compression type compressor (hereinafter referred to as a two-stage compressor) 3. are coaxial and are attached so that they can rotate together. The first rotor 4 and the second rotor 5 of the two-stage compressor 3 are shifted in phase by 180 degrees.

Next, the configuration of the air conditioning refrigerant circuit 20 will be explained.

21 is a first condenser, which includes an outlet 22 of the first rotor 4 and a first inlet 23 of the second rotor 5 of the two-stage compressor.
It is located in the middle of the. 24 is the second condenser,
One side is connected to the outlet 25 of the second rotor 5, and the other side is connected to the oil separator 26, respectively.
A liquid tank 27 is provided midway between the oil separator 26 and the first valve 28. A first expansion valve 29 is opened and closed by a temperature sensor 29a, one of which is connected to the first valve 28 and the other to a cooler 31 with an air conditioning fan 30. The cooler 31 is installed inside a house, an automobile, a ship, etc., and contains an air cleaning adsorbent (for example, silica gel, activated carbon, etc.).
Made of zeolite, glass fiber filter, etc. ) is built-in. 32 is a second valve that passes only the high temperature air conditioning refrigerant;
1 and the inlet 33 of the first rotor 4. 34 is a third valve, one of which is connected to the oil separator 26 and the other to the inlet 33 of the first rotor 4. This channel is a channel for collecting separated oil. A fourth valve 35 is provided midway between the outlet 25 of the second rotor 5 and the first branch point 36. Reference numeral 38 denotes a fifth valve through which only the air conditioning refrigerant whose temperature has not become too high is connected, one of which is connected to the second branch point 39 and the other to the second inlet 49 of the second rotor 5. There is.

Next, the configuration of the freezer refrigerant circuit 50 will be explained.

Reference numeral 51 denotes a sixth valve, which is provided midway between the third branch point 52 of the air conditioning refrigerant circuit 20 and the second expansion valve 53, which is opened and closed by the sensor 53a. 54 is a cooler which will be described in detail later, one of which is the second cooler.
The other end is connected to the expansion valve 53 and the other end is connected to the fourth branch point 56 of the air conditioning refrigerant circuit 20 through a seventh valve 55. Reference numeral 57 denotes an eighth valve, which is provided midway between the fifth branch point 58 of the air conditioning refrigerant circuit 20 and the sixth branch point 59 of the freezer refrigerant circuit 50.

The configuration of the cooling circuit 60 is as follows.

This circuit 60 includes a discharge port 61 of the rotor 2 having the function of the cooling pump, the second condenser 24,
The first condenser 21 is then connected to the inlet port 6 of the rotor 2 via a radiator 62.
3 and is configured to circulate.

As shown in FIG. 3, the cooler 54, together with the second expansion valve 53, is fixed to a cooler mounting plate 71 that is fixed by a stopper 70 in the trunk room or cabin of the automobile. . As shown in FIG. 5, the cooler 54 is a double pipe consisting of an inner pipe 54a and an outer pipe 54b, and is provided so as to communicate with the seventh valve 55. 72 is the cooler 5
The cooling plate is fixed to 4. A spring 73 is provided between the cooler mounting plate 71 and the cooling plate 72, and serves to ensure good thermal contact. A bellows 74 is made of a material such as plastic or rubber and is provided to prevent the cooler 54 from coming into direct contact with the outside air, and its both ends are fixed to the cooler mounting plate 71 and the cooling plate 72, respectively. This bellows 74 is used to reduce heat intrusion loss from room temperature, and to provide a degree of freedom to the cooling plate 72 so as to make good thermal contact with a regenerator 85, which will be described later. The temperature sensor 53a of the second expansion valve 53 is provided on the lower surface of the cooling plate 72 and near the cooler 54. Reference numeral 75 denotes a metal fitting fixed to the cooler mounting plate 71.

Next, the configuration of the portable freezer 80 will be explained based on FIG. 4. Reference numeral 83 denotes an inner tank of the hollow heat storage material container 81 made of a good heat conductor such as aluminum, and a heat insulating space 84 is provided between the outer tank 82 and the inner tank 83.
is formed. Inner tank 8 of this heat storage material container 81
Inside 3 is used as a space for storing objects to be cooled such as food. 85 is the inner tank 83 of the heat storage material container 81
A bowl-shaped regenerator installed at the bottom of the inside, for example -
It contains water, which has a high specific heat between 30℃ and 0℃, a mixture of water and ethylene glycol, other liquids, and metal powder. 86 is a heat insulating lid. The heat storage material container 81 has an internal space 87 below, and when used as a single item, a removable bellows 89 is attached and a heat insulating plug 90 is screwed. Reference numeral 91 denotes a locking portion fixed to the lower part of the outer tank 82 of the heat storage material container 81.

In the above configuration, the case where various spaces or rooms are cooled will be explained first.

When the shaft 1 is rotated through a prime mover (not shown) and a clutch, a rotor 2 for cooling fluid and a rotor 2 for refrigerant are rotated.
The first rotor 4 and the second rotor 5 of the stage compressor 3 rotate integrally. For this reason, the air conditioning refrigerant (freon or other single substance or mixture) is first compressed in the first rotor 4 and then flows from the inlet 33 to the outlet 22.
On the way there, it is intermediately cooled in the first condenser 21, then enters the second rotor 5 through the inlet 23, is recondensed inside, is sent to the outlet 25, and is further transferred to the second condenser 24.
The oil is further cooled and sent to the oil separator 26. Here, the oil component of the air conditioning refrigerant is separated, and this is passed through the third valve 34 to the inlet 3 of the first rotor 4.
Returned to 3. Furthermore, the air conditioning refrigerant is sent to the expansion valve 29 from the first valve 28 via the liquid tank 27, and if the temperature is high according to the action of the temperature sensor 29a, the air conditioning refrigerant opens and the air conditioning fan 30 in the room or in the car is opened. A cooler 31 with an air cleaning adsorbent (for example, made of silica gel, activated carbon, zeolite, glass fiber filter, etc.) is raised to cool the room. If the room becomes too cool, the temperature sensor 29a operates and the expansion valve 29
closes. The air conditioning refrigerant, which has cooled the room and has become warm, is returned to the inlet 33 of the first rotor 4 through the second valve 32, and is recirculated together with the separated oil component. Further, the still cold air conditioning refrigerant remaining after cooling the room is returned from the second branch point 39 through the fifth valve 38 to the second inlet 49 of the second rotor 5, and is recirculated from the middle.

Subsequently, when it is desired to cool the inside of the freezer 80, the air conditioning refrigerant cooled as described above is transferred from the air conditioning refrigerant circuit 20 to the freezer refrigerant circuit 5 by opening the sixth valve 51.
Just run it to 0. This refrigerant is further supplied to the second expansion valve 53
2 and 3, and is opened when the temperature is high due to the action of the temperature sensor 53a.
It flows in order through the inner pipe 54a and outer pipe 54b of the cooler 54 shown in detail in the figure, and cools the inside of the freezer 80 (the regenerator 85 thereof) by cooling the cooling plate 72. When there is no regenerator 85, it is also possible to fill it with water and make ice.

If the inside of the freezer 80 is cooled too much,
The expansion valve 53 is closed by the temperature sensor 53a. The refrigerant that has cooled the inside of the freezer 80 and has become warm flows through the refrigerant flow path b of the outer pipe 54b, passes through the sixth branch point 59, the eighth valve 57, and then flows through the fifth branch of the air conditioning refrigerant circuit 20. From point 58 to the second
It is returned to the second inlet 49 of the rotor 5 and recirculated from the middle. At this time, the cooler 54 and the valves 51, 55
The inner tube 54a is made of metal, rubber containing metal wire, or plastic material, so that the same effect as a heat exchanger can be obtained. For example, the liquid tank 27, the sixth
Since the valve 51 is located, for example, in the engine room of a passenger car, the temperature of the refrigerant is 30 to 45°C when it exits from the sixth valve 51 in the summer, but the temperature of the refrigerant at the inlet 92 of the expansion valve 53 in the trunk is high. The length of the tube passing through a is 4 to 5 m, and a temperature drop of about 10°C can be obtained experimentally.

If the freezing temperature on the freezer side is lowered without requiring much cooling in the refrigerator, the refrigerant exiting the cooler 31 in the air conditioning refrigerant circuit 20 is passed through the fifth valve 38 from the second branch point 39. Return to the inlet 49 of the second rotor 5. As a result, the expansion ratio between the first expansion valve 29 and the fifth valve 38 becomes smaller, and the amount of refrigeration is reduced. In other words, if the enthalpy at each pressure is H (the subscript numbers are the same as in Figure 1) and the flow rate of the refrigerant is M, then the amount of refrigeration Q is Q=M・△H, so (H ₃₃ - H ₂₈ )M>>(H ₅₈ - _{H 28} )M.

Further, if cooling of the freezer 80 is not necessary,
Naturally, it will be a normal air conditioner.

Furthermore, in order to cool the refrigerant used for at least one of the air conditioning and the freezer, water, oil, or water and a liquid such as ethylene glycol methanol or the like discharged from the rotor 2 having the function of a cooling pump are used. From the discharge port 61, the mixed liquid passes from the second condenser 24 (for condensing refrigerant) to the first condenser 21, is further cooled by a radiator 62 at the front of the automobile, and returns to the intake port 63. In this system, the radiator 62 is a liquid and atmosphere, and the second condenser 24 is a liquid and two-phase flow (condensation process).
Each has higher heat transfer efficiency and can be made smaller and lighter.

By the way, the freezer 80 can be easily removed from the state shown in FIG. 2 by removing the metal fitting 75 from the locking portion 91. As shown in FIG. 4, the heat storage material container 8
A bellows 89 is installed in the internal space 87 below the refrigerator 1, and then a heat insulating plug 90 is screwed on to form a portable freezer 80 as a single item. In this case, the inside of the freezer 80 may be cooled in advance by the method described above.

Note that the first valve 28, the second valve 32, and the fifth valve
38. The number of the sixth valves 51 is reduced by using a three-way valve or a four-way valve driven by manual, electromagnetic, fluid, etc., for example.
Control can be simplified. Furthermore, as shown in FIG. 1, when reducing the amount of refrigeration on the freezer 50 side and increasing the amount of air conditioning, the eighth valve 57 and the second valve 32 are opened, and the seventh valve 50 is opened.
5. This can be done by closing the fifth valve 38. In these methods, when the expansion ratio is halved, the amount of refrigeration is also approximately halved.

As described above, according to the present invention, the following effects can be obtained.

(1) The locking part provided on the outer tank of the heat storage material container and the metal fitting of the cooler as the external mating part are designed to be removable, and the metal fitting and the locking part are locked to By bringing the cooler into contact with the regenerator in the internal space formed below the heat storage material container, it functions as a freezer without having a refrigeration cycle machine, and the metal fittings and locking parts can be removed. This makes it a portable freezer that can be easily carried around.

(2) When the metal fitting and the locking part are locked,
By bringing the cooler and the regenerator into close contact with each other, the cooling and heat transfer surfaces of both devices can easily have a contact surface structure with a large heat transfer effect.

(3) When transporting the freezer with the metal fittings and the locking portion disengaged, the refrigerating capacity can be maintained for a long time even during transport by attaching a heat insulating stopper and a heat insulating lid.

(4) The portable freezer of the present invention has a wide range of uses. For example, when used in a car, it can be installed by simply branching the car cooler piping, and since it is portable, it is easy to transport. Since the regenerator is provided, the refrigerating function can be maintained for a long time even when the engine is stopped or during transportation.

[Brief explanation of the drawing]

The figures all show one embodiment of the portable freezer of the present invention. Figure 1 is an overall flow path diagram, Figure 2 is a central vertical sectional view showing the installation state of the portable freezer, and Figure 3 is a portable freezer. Figure 4 is a central vertical cross-sectional view of the other handle with the freezer removed, Figure 4 is a central vertical cross-sectional view showing the portable freezer as a single item, and Figure 5 is the arrow X in Figure 1.
FIG. 3 is an enlarged cross-sectional view of the double pipe taken along the X′ line. 52: Cooler, 71: Cooler mounting plate, 72: Cooling plate, 75: Metal fittings, 80: Portable freezer, 81:
Heat storage material container, 82: Outer tank, 83: Inner tank, 84: Heat insulation space, 85: Cool storage device, 86: Heat insulation lid, 8
7: Internal space, 89: Bellows, 90: Heat insulation plug,
91: Locking part.

Claims (1)

[Claims] 1. A hollow heat storage material container made of a good thermal conductor;
A heat insulating space formed between an outer tank of the heat storage material container and an inner tank for storing the object to be cooled, a heat storage device provided at the bottom of the inner tank, and a heat storage material provided at the top of the heat storage material container. a heat insulating lid, an internal space formed below the heat storage material container, a bellows removably hanging from the internal space, a heat insulating plug screwed into the lower interior of the outer tank, and A portable freezer comprising a locking part provided on an outer tank of the heat storage material container. 2. In the portable freezer according to claim 1, after the bellows and the heat insulating plug are removed, the locking portion provided on the outer tank of the heat storage material container and the cooler as an external mating attachment portion are removed. The portable freezer is configured such that the cooler is brought into contact with the regenerator in an internal space formed below the heat storage material container by being locked with a metal fitting.