JPH0313774A - Vehicle-borne cooling device - Google Patents

Abstract

PURPOSE:To compact the whole while smoothly flowing an air current by a cooling fan by housing each constitutional equipment of a high pressure unit into a hollow cylindrical body. CONSTITUTION:A cooling fan 17, a driving power supply 7, a condenser 12 and a compressor 11 are disposed successively into a hollow cylindrical body 6 in the axial direction. An air current by the cooling fan 17 can efficiently cools the driving power supply 7, the condenser 12 and the compressor 11 installed into the hollow cylindrical body 6, and a function as a high pressure unit can be displayed sufficiently. Since an opening section 61 formed to the hollow cylindrical body 6 can be shaped in the size of the irreducible minimum of a demand, noises from a constitutional equipment housed the inside are not diffused to the outside. Accordingly, an occupying area can be reduced while cooling efficiency is improved, and the generation of noises can be lowered.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention has the following features: (1) A high-pressure unit consisting of a compressor and an air-cooled condenser, and an evaporator, such as an on-vehicle refrigerator that can be mounted on a passenger car. The present invention relates to an on-vehicle cooling system in which low-pressure units and low-pressure units are provided in isolation from each other (for example, in a trunk room and a passenger seat), and the two units are connected via refrigerant piping.

[Conventional technology]

FIG. 7 is an explanatory diagram showing an example of the configuration of a conventional vehicle-mounted refrigerator. In the figure, 1 is a high pressure unit.

Reference numeral 2 designates low-pressure units, each of which is installed separately in, for example, a trunk room and a passenger seat, and the units 1 and 2 are connected via a refrigerant pipe 3 so that refrigerant (not shown) can be circulated in the direction of the arrow. There is. First, the high pressure unit 1 includes a compressor 11. It is constructed by connecting components such as a condenser 12 and a strainer 13 in series. The condenser 12 is formed, for example, by interposing a large number of cooling fins 12b on a refrigerant pipe 12a formed in a zigzag shape, and air flow from a cooling fan (not shown) is distributed between the cooling fins 12b. The zero-order low-pressure unit 2, which is normally formed in such a manner, is constructed by installing an evaporator 22 in a cabinet 21 provided with a heat insulating material. Incidentally, the evaporator 22 often has two fin tubes, for example, in order to increase the heat transfer area similarly to the condenser 12. The refrigerant pipe 3 includes a discharge pipe 31 and a capillary tube 32 that supply liquid refrigerant, and a suction pipe 33 that transports gaseous refrigerant.

34 is a coupler, and 4 is a partition.

With the above configuration, the gaseous refrigerant is first compressed by the compressor 11 to a high temperature and high pressure state, and then is sent to the condenser 12, where it is condensed into a high pressure liquid by heat exchange, and foreign matter is removed via the strainer 13. Since a constant pressure tX is applied in the zero-order capillary tube 32 that is removed and fed through the discharge pipe 31, a part of the liquid refrigerant is vaporized, and the latent heat of vaporization is taken away, so that the liquid refrigerant is cooled. The cooled refrigerant evaporates in the evaporator 22, thereby removing heat from the inside of the cabinet 21 and lowering the temperature inside the cabinet 21.

It can function as a so-called refrigerator. The gaseous refrigerant then returns to the compressor 11 via the suction pipe 33, where it is compressed again and used for circulation.

[Problem to be solved by the invention]

In the 5CQT type cooling device as described above, the discharge pipe 31 can be arranged along the suction pipe 33, so the high pressure unit 1-1 and the low pressure unit 2 should be installed separated by at least 1 m. Therefore, the high-pressure unit 1 can be built into a frame, for example, to have a compact configuration.

FIGS. 8(a) and 8(b) are a perspective view and a vertical sectional view of a main part showing an example of a conventional high-pressure unit 1, respectively, and the same parts are designated by the same reference numerals as in FIG. 7. at 15
is the frame and pressure! 1m11, drive electric-a7. Holds the cooling fan 17 and condenser 12. The condenser 12 has a portal-shaped longitudinal section and is provided so as to surround other components, and a cover 18 is provided on the outside thereof. 1
Reference numeral 8a denotes an opening through which airflow from the cooling fan 17 can flow. Reference numeral 19 denotes a piping joint, which is provided so that a refrigerant pipe (not shown) can be connected to a low pressure unit (not shown).

The high voltage unit 1 having the above configuration is normally installed in the trunk 51 of a passenger car 5 as shown in FIG. 9, for example. Since the external outline of unit l is a rectangular parallelepiped, trunk 5
This increases the volume occupied by the trunk 51, reducing the capacity of the trunk 51. In addition, the cooling fan 1 shown in FIG. 8(b)
7 is.

Although each component including the condenser 12 is cooled by the airflow, the circulation of the airflow is not necessarily performed smoothly, resulting in low cooling efficiency and lowering the efficiency of the high-pressure unit 1 as a whole. Furthermore, as shown in FIGS. 8(a) and 8(b), since the opening 18a is formed large in order to cool and radiate heat from the high-pressure, high-temperature refrigerant in the condenser 12, the operation of the compressor 11 and the cooling fan 17 is prevented. There are problems such as the sound being dissipated to the outside and causing noise. Furthermore, the compressor 11
However, a vibratory compressor is often used.

As shown in Fig. 10, the conventional type is supported by two upper and lower coil springs lla, so vibrations and
Noise is transmitted through the coil spring lla to the frame 15 and the cover 18 shown in FIGS. 8(a) and 8(b).
There is a problem in that the noise is transmitted to the outside, and in some cases, it is further amplified due to resonance and the noise is dissipated to the outside.

The present invention solves the problems existing in the above-mentioned prior art, occupies a small volume, and has high cooling efficiency.

Another object of the present invention is to provide an on-vehicle cooling device equipped with a quiet high-pressure unit that generates little noise.

[Means to solve the problem]

In order to achieve the above object, first, in the first invention, a high pressure unit consisting of a compressor and an air-cooled condenser and a low pressure unit 7) consisting of an evaporator are provided in isolation from each other, and a single unit is provided. A high-pressure unit is formed by installing a compressor, a cooling fan, a condenser, and a driving power source in the axial direction in a hollow cylinder formed by opening both ends in an on-vehicle cooling system that is connected through refrigerant piping. However, the cooling fan is configured so that the airflow flows in the axial direction of the hollow cylindrical body. A technical method was adopted.

Next, in a second invention, in addition to the technical means in the first invention, a buffer material made of a heat-resistant elastic material is interposed between at least the compressor and the hollow cylinder.

Constructed to prevent generation of vibration and noise.

Added a technical means.

Furthermore, in the third invention, a high pressure unit consisting of a compressor and an air-cooled condenser and a low pressure unit consisting of an evaporator are provided in isolation from each other, and the two units are connected via a refrigerant pipe. In the in-vehicle cooling system,
A condenser is formed by providing a spiral refrigerant pipe made of a material with a high thermal conductivity in close contact with the surface of a hollow cylinder made of a material with a high thermal conductivity. machines to form a high pressure unit.

A technical method was adopted.

[For production]

With the above configuration, in the first invention.

By housing each component of the high-pressure unit in a hollow cylinder, the whole can be made compact, and
This can be expected to have the effect of smoothing the air flow caused by the cooling fan.

Next, in the second aspect of the present invention, in addition to the above-mentioned effect, it can be expected to have an effect of blocking the transmission of vibration between the compressor and the hollow cylindrical body.

Furthermore, in the third invention, it is expected that the high-pressure unit will be made more compact, and the heat exchange effect in the condenser can be increased, so that the efficiency of the high-pressure unit can be expected to be improved.

〔Example〕

FIG. 1 is a perspective view of main parts showing a first embodiment of the present invention,
Identical parts are indicated by the same reference numerals as in FIGS. 7 to 10. In FIG. 1, 6 is a hollow cylinder, 2 is made of, for example, an iron-based material, and has a circular cross-sectional shape. An opening 61 is provided. Note that the hollow cylinder 6 is shown in a transparent state to facilitate understanding. Reference numeral 62 denotes a mounting member, which is appropriately fixed to the outer periphery of the hollow cylindrical body 6. Inside the hollow cylindrical body 6.

Cooling fan 17. Drive power supply7. A condenser 12 and a compressor 11 are arranged in sequence in the axial direction. Note that the drive power source 7 is electrically connected to a motor (not shown) that drives the cooling fan 17 and the compressor 11. Further, the airflow generated by the cooling fan 17 is formed to flow in the axial direction within the hollow cylinder 6 from one opening 61 toward the other opening (not shown).

With the above configuration, the airflow caused by the cooling fan 17 is controlled by the driving IIT source provided inside the hollow cylindrical body 6. , the i* compressor 12 and the compressor 11 can be efficiently cooled, respectively, and the function of the high-pressure unit 1 can be fully exhibited. In addition, since the opening 61 provided in the hollow cylinder 6 can be formed to the minimum required size, noise from the components housed inside will not be dissipated to the outside. 62, it is possible to attach it to the upper part of the trunk 5I, for example, as shown in FIG.

A sufficient effective space within the trunk 51 can be secured.

FIG. 3(a) is a vertical cross-sectional view of a main part showing a second embodiment of the present invention, and FIG. 3(b) is a cross-sectional view taken along the line A-A in FIG. In FIGS. 3(a) and 3(b), which are indicated by the same reference numerals as in FIG. .65 are each a buffer material, compressor 1
1 and the partition member 63 and the inner surface of the hollow cylinder 6. Note that the dimensions of the partition member 63 and the cushioning materials 64 and 65 are made smaller than the cross-sectional internal contour dimensions of the hollow cylindrical body 6, so that the airflow caused by the cooling fan 17 can smoothly flow inside the hollow cylindrical body 6. The zero-order cushioning material 64,65 is preferably selected as follows: For example, the zero-order cushioning material 64,65 is a tube or bag made of a material with high heat resistance and sealing properties such as PTFE (polytetrafluoroethylene), and is filled with fluorocarbon gas, engine oil, etc. It can be formed by enclosing a chemically stable fluid with low thermal expansion.

With the above configuration, even if the cushioning material 64°65 is interposed in the hollow cylindrical body 6, the air flow by the cooling fan 17 is not affected at all, so that the effects of the first embodiment can be naturally achieved. I can do it.

In addition to these, with the configuration shown in FIGS. 3(a) and (b),
Even when a vibrating compressor is used as the drive motor for the compressor 11, the vibration is absorbed by the buffer material 64, 65, so it is not transmitted to the hollow cylindrical body 6, and vibration and noise can be significantly reduced. . Furthermore, there is no need to interpose the coil spring 11a as shown in FIG. 1O, which not only simplifies the structure, but also allows the compressor 11, including the drive motor, to be installed in any direction, vertically or horizontally.

FIG. 4 is a vertical cross-sectional view of a main part showing a third embodiment of the present invention, and the same parts are the same as those of the first and second embodiments shown in FIG. 1 and FIGS. 3(a) and (b). In FIG. 4, which are indicated by the same reference numerals, the hollow cylindrical body 6 is made of a material with high thermal conductivity, such as copper, and has a circular cross-sectional shape.The zero-order refrigerant pipe 12a is formed in a spiral shape. Then, it is wrapped tightly around the outer surface of the hollow cylinder 6. Reference numeral 66 denotes a mounting member, which is provided within the hollow cylindrical body 6 and supports the compressor 11. Note that one end of the refrigerant pipe 12a is connected to the discharge pipe 11b of the compressor 11.
The other end is connected to the discharge pipe 31 via the strainer 13. Airflow is caused to flow through the inner and outer surfaces of the hollow cylindrical body 6 by a cooling fan (not shown), and the hollow cylindrical body 6 is formed to function as a condenser together with the refrigerant pipe 12a.

With the above configuration, the gaseous refrigerant compressed to high temperature and high pressure by the compressor 11 is cooled by the condenser constituted by the hollow cylinder 6 and the refrigerant pipe 12a, and the condensed and liquefied refrigerant is passed through the strainer 13. can be discharged into the discharge pipe 31. As a result, compared to conventionally used wire type, fan type, or pipe-on-sheet type condensers, it is easy to manufacture and can be expected to have extremely high heat exchange efficiency.
This figure and FIG. 6 are enlarged vertical cross-sectional views of essential parts showing a modification of the third embodiment of the present invention shown in FIG. 4, respectively. FIG. 5 shows an example in which the refrigerant pipe 12a is embedded in a groove 67 provided on the outer surface of the hollow cylinder 6, and FIG.
This is an example in which the groove 67 is embedded in the inner surface of the groove 67. In either example, the operation is the same as that shown in FIG. 4 above.

In the above embodiment, the case where the cross-sectional contour shape of the hollow cylinder was circular was described, but the effect is the same when other geometric shapes other than a circle such as a square, a polygon, and an ellipse are used. The arrangement order of the high-pressure unit components in the zero-order hollow cylindrical body is not particularly limited, and can be freely selected as long as the airflow by the cooling fan can flow in the axial direction of the hollow cylindrical body. However, it is preferable to install the AM device on the upstream side of the airflow.Furthermore, the material forming the buffer material in the second invention may be other than hollow bodies and fluids, in short, other materials may be used as long as they have heat resistance and vibration absorption properties. The constituent materials can be selected. In the above embodiments, the low-pressure unit is a refrigerator, but it may also be a small freezer, or it may be used as an air-conditioning device that supplies cold air into passenger seats.

〔Effect of the invention〕

Since the present invention has the structure and operation as described above,
You can expect the following effects.

(1) By accommodating the equipment constituting the high-pressure unit within the hollow cylinder, the entire unit can be made extremely compact, and the occupied space can be made extremely small.

(2) Since the components are housed in a hollow cylinder, airflow by the cooling fan is extremely smooth.

The functionality of the high pressure unit can be improved.

(3) Since the opening provided in the hollow cylinder can be small, quiet operation is possible without dissipating noise to the outside.

(4) By providing a buffer member inside the hollow cylinder, 5
Not only can noise be further reduced, but also vibration transmission can be blocked.

[Brief explanation of drawings]

FIG. 1 is a perspective view of essential parts showing a first embodiment of the present invention. FIG. 2 is an explanatory diagram showing an example of an installed state of the device shown in FIG. 1, and FIG. Main part longitudinal sectional view showing an example, No. 3
Figure (b) is a sectional view taken along line A-A in Figure 3 (a),
5 and 6 are enlarged longitudinal sectional views of essential parts showing a modification of the third embodiment of the invention shown in FIG. 4, respectively, FIG. 7 is an explanatory diagram showing an example of the configuration of a conventional in-vehicle refrigerator, FIGS. The figure is an explanatory view showing an example of a conventional device installed, and FIG. 10 is an explanatory view showing an example of a conventional vibrating compressor. 1: High pressure unit 2: Low pressure unit, 3: Refrigerant piping,
6: Hollow cylindrical body, 12a: Refrigerant pipe, 17: Cooling fan, 6
4,65: Cushioning material.

Claims (3)

[Claims] (1) A vehicle cooling system in which a high-pressure unit consisting of a compressor and an air-cooled condenser and a low-pressure unit consisting of an evaporator are provided in isolation from each other, and both units are connected via refrigerant piping. A compressor, a cooling fan, a condenser, and a driving power source are installed in the axial direction in a hollow cylinder formed with both ends open to form a high-pressure unit, and the airflow by the cooling fan flows in the axial direction of the hollow cylinder. An in-vehicle cooling device characterized by being configured to. (2) The in-vehicle cooling device according to claim (1), wherein a buffer material made of a heat-resistant elastic material is interposed between at least the compressor and the hollow cylinder to prevent generation of vibration and noise. (3) An on-vehicle cooling system in which a high-pressure unit consisting of a compressor and an air-cooled condenser and a low-pressure unit consisting of an evaporator are provided in isolation from each other, and both units are connected via refrigerant piping. In this method, a condenser is formed by providing a spiral refrigerant pipe made of a material with a high thermal conductivity in close contact with the surface of a hollow cylinder made of a material with a high thermal conductivity. An on-vehicle cooling device characterized in that a compressor is disposed in a high-pressure unit.