JPS6091159A - Air-cooling refrigerator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention provides a cooling device for forming and covering a refrigerated recycle container for refrigeration.
Illzurumonogu, 7
It is suitable for use in automobiles.

Cooling equipment installed in cars, drinking water and refrigerated items
JI Zuru refrigeration equipment has a cooling evaporator and a refrigeration evaporator installed in parallel to provide 1q of refrigeration cycles each with a different evaporation section, and the refrigerant flow to each evaporator is controlled in time. Refrigerant has been supplied by switching. As a result, not all of the refrigerant discharged by the compressor is supplied to the cooling evaporator, resulting in a decrease in cooling efficiency, and the problem is that the evaporator dedicated to cooling with the same capacity of 1 refrigeration unit is used to fill the container, resulting in a decrease in cooling capacity. there were.

The purpose of the present invention is to supply the liquid phase refrigerant in the Akicomulator installed downstream of the cooling evaporator to the refrigeration evaporator to:
lt, the refrigerant compressor is separated into a main suction port that sucks a certain amount of refrigerant and a sub suction port L that sucks the remaining amount of refrigerant.
To provide a refrigeration/cooling device that can reliably maintain the refrigerant flow path passing through the cooling evaporator-3 and the refrigeration evaporator at the set value and ensure a predetermined refrigeration effect. '3J: To provide an air-conditioning/refrigeration device in which both the main compression part and the auxiliary compression part of the compressor can be used for cooling when no freezing is performed, and a high cooling effect can be obtained.

The cooling and refrigerating device of the present invention includes: a compressor having a main suction port and a sub suction port; a condenser installed to convert gas refrigerant discharged from the compressor into liquid refrigerant; The liquid refrigerant is expanded to form a mist refrigerant, and the air-conditioning compressor installed in the air conditioner evaporates the dew-like refrigerant and cools the surrounding air.
A cooling evaporator, an accumulator that divides the refrigerant discharged from the cooling evaporator into gas phase refrigerant and liquid phase refrigerant, and only the gas phase refrigerant from the accumulator is connected to the -1 suction I. A refrigerant suction pipe for cooling, a refrigeration cooling device connected in parallel to the refrigerant suction pipe for cooling so that only the liquid phase refrigerant inside the Akicomulator is expanded and becomes a mist refrigerant; The atomized refrigerant in the device is evaporated! 4. It is composed of a refrigerating evaporator that performs refrigeration, and a refrigerant suction pipe that connects the refrigerating evaporator to the sub-intake.

The cooling and refrigerating device of the present invention based on the above-mentioned four components (exhibits the same effect).

a) A sub-compression section with an independent suction side can be easily realized at a low cost by installing a sub-intake separately from the conventional main inlet installed in a cooling compressor. can.

b) By using the sub-compression section provided in the cooling compressor, it is possible to realize a refrigeration evaporator which has a different evaporation power from the cooling evaporator.

C) Install an electromagnetic button in the middle of the communication pipe that passes through and covers the cooling refrigerant suction piping and the refrigeration refrigerant suction piping to activate the refrigeration side.
l! When it is not available, the communication pipe can be opened using a solenoid valve (a solenoid valve is installed), and the auxiliary compression section of the compressor can be used for cooling, resulting in a large cooling capacity.

d) Compared to the case where the cooling evaporator and the refrigeration evaporator are configured in parallel, more wet refrigerant is supplied to the cooling evaporator and the cooling capacity increases.

Next, the present invention will be explained based on specific examples.

FIG. 1 is a refrigeration one-day diagram showing the configuration of a specific embodiment in which the present invention is applied to a refrigerator/air conditioner for an automobile. The compressor 21 is coupled via an electromagnetic clutch 20 to an auxiliary drive shaft of an engine of an automobile (not shown). The compressor 21 is of a swash plate type with <10 cylinders as described later, of which nine cylinders are used as a main compression section 21a for cooling, and only one cylinder is used as a sub-compression section 21b. In this case, the suction 1-'' of the compressor 21 is the main suction [121C] of the main compression section 21a, and the sub suction [:',
The refrigerant compressed in each of the main compression sections 21aJ3, 1. and the auxiliary compression section 211 is discharged from the outlet 021e. It looks like this.

As described above, the auxiliary compression section 21b of the compressor 21 of this embodiment uses only one of the 10 cylinders, and the capacity of the compression space is considerably smaller than that of the main compression section 21a. Moreover, each compression part has an independent suction port.
This makes it possible to make the suction force of each compression part independent. Therefore, if the C1 cooling evaporator 24 is connected to the main inlet 21c, and the freezing and refrigerating evaporator 28 is connected to the sub-inlet 21d, the freezing and refrigerating evaporator 28
The internal evaporation pressure can be set to be smaller than the evaporation Fl force within the air conditioner 24. Therefore, the refrigerant temperature in the freezing/refrigerating evaporator 28 can be made lower than the refrigerant temperature in the cooling evaporator 24. For example, for cooling.

The temperature of the refrigerant in the evaporator 24 is not lower than 5° C. in order to prevent the surface of the hood 24a from freezing. On the other hand, if the evaporation pressure of the refrigerant evaporator 28 is lowered to 0.5 kg/cm, the temperature of the refrigerant in the refrigeration evaporator 28 can be lowered to -21°C, and the ice-making function can be changed to the refrigerator m. Is it possible to do so?

The discharge port 21e of the compressor 21 is connected to a condenser 22 installed in a place with good communication with the vehicle, and the discharge side of the condenser 22 is a refrigerant pressure reducing device, in this example a capillary duplex. The cooling evaporator 24 is connected to the cooling evaporator 24, and the cooling evaporator 24 is connected to the cooling evaporator 24 at the downstream side of the gear pillar duplex 23. , a) Through the comulator 25, the suction pipe 4 for the) 9 chambers
5 is connected to the main suction [212ic] of the inspection product 21a.
The refrigerant flowing out from the refrigerant is separated into gas phase refrigerant and liquid phase refrigerant,
Only the gas phase refrigerant is led to the cooling suction pipe 45 from the gas phase refrigerant discharge [] 25a. Freezer/refrigerator section 2G for freezing/refrigerating
is installed downstream from the liquid phase refrigerant discharge r125b that discharges only the liquid phase refrigerant of the accumulator 25 (J and C).
In addition, the refrigerator-freezer section 2G has a constant pressure expansion valve 21, which is a specific example of a device for reducing the discharge of liquid phase refrigerant from the discharge port 251).
It consists of a freezing/refrigerating evaporator 28 connected to this, and two reverse 11 valves that allow the refrigerant waste to pass in only one direction.

The Ijl outlet side of this check valve 29 is connected to the sub-intake port 21d by a freezing/refrigeration suction pipe 46. The constant pressure expansion valve 27 opens when the flow pressure, that is, the set pressure of the freezing and refrigerating evaporator 28 decreases to, for example, 0.5 kg/cn+ or less.

The freezing and refrigeration suction pipe 46 and the cooling suction pipe 45 are communicated through a communication pipe 47.

A solenoid valve 48 is disposed in the communication pipe 47, and when energized, it closes and blocks the flow of refrigerant in the communication pipe 47. Inside the refrigerator-freezer (not shown) which incorporates a refrigerator-freezer generator 28, there is installed a sensor 49 for detecting the cooling state in the refrigerator. This temperature control no. 49 is designed to close after the set temperature (for example, 5° C.). An operating switch 50 of the refrigerator is connected to the temperature sensor 49 in a row of teeth. When the operating switch 50 and the leakage switch 49 are both closed, the solenoid valve 48 is energized and turns on. I'm here. , 51 is a battery during automatic operation.

The configuration of the compressor 21 is shown in FIG. 2d3 and FIG.
It is a swash plate type that converts to In the case of a 10-cylinder engine, there are five screws, and when the 11 side of each piston is in the LL contraction stroke, it is the suction stroke of 1°. is shirt 1-1
It is fixed with a key and rotates together with shirts 1 to 1.
The swash plate 5 is a piston whose surface ir+i is coded with 1-71'' J, and the resin-based plate 1.
Avoid reciprocating motion. 6 is a cylinder button C which overcomes the movement of the column 11i of the piston 5.

21c is a gas phase refrigerant discharge port 25a of the Akicomulator 25
A main suction port 21d communicates with the refrigerant evaporator 28 to introduce refrigerant into the cylinder block G, and a sub suction port 21e communicates with the evaporator 28 for freezing and refrigerating the refrigerator to introduce refrigerant into the cylinder 71J6.
8 is a housing 8, which is a main housing 8a that covers the outer circumference of the cylinder tab 6, and a flap between the electromagnetic clutch 20. The opposite side of the font housing 81+ is made up of a glued housing 8c, etc., and a cylinder block 6 is connected to the C cylinder block 6 via a through bolt port 1 to hole (not shown).
It is fixed. , 9a is the suction bow installed in the valve play 1-9, and the suction bow 1-19b is the discharge bow installed in the valve play 1-9. 10a is a suction valve made of an elastic metal plate, and 101) is a discharge valve made of an elastic metal plate.

The housing 8 includes a rear housing 8 as shown in FIG.
A main suction chamber 8d for cooling refrigerant, a sub suction chamber 8e for freezing and refrigerating refrigerant, and a discharge chamber 8f are formed in C. In addition, in Fig. 3, broken lines a,
9a and 91) respectively indicate the positions of the cylinders, and 9a and 91) respectively indicate the suction bow 1- and the discharge bow 1~ installed on the valve plate 1. The suction chamber 8e is provided independently from the main suction chamber 8d for cooling refrigerant by the rear housing 8G. An auxiliary suction port 21d ffN is opened in the auxiliary suction chamber 8e, and the refrigerant sucked from the auxiliary suction port 21d passes through the suction holes 1 to 0a and is compressed by C inside the cylinder block 6 as shown in FIG. .

The cold ts introduced through the main suction port 21c is once guided through the refrigerant inflow pipe J: inside the cylinder block 6, is discharged into the main suction chamber 8d from the suction refrigerant discharge 1::I6b, and is sucked from the suction bows 1 to 9a. be done. The refrigerant compressed in the sub-compression section 21b and the main compression section 21a inside the other cylinder is
From the discharge chamber 8 from the discharge bows 1 to 9b via the discharge valve 101)
r, and the gap 6c between port 1-53 and port 1-hole 55
It passes through and is discharged from the discharge port 21e.

Next, the operation of the above embodiment will be explained.

FIG. 4 is a Mollier diagram of a refrigeration cycle to explain Takeda. 1 no-cycle of the solid line 60 in the figure indicates the state of the refrigerant in the refrigeration cycle for cooling, and is an operating characteristic curve.
A broken line 61 is an operating characteristic curve of a refrigeration cycle. A current is passed through the field coil of the electromagnetic clutch 20, and due to its action, the driving force of 121 engine is compressed I! I
21, the compressor rotates and compresses the frozen gas. At this time, turn on the refrigerator operation switch 50,
If the temperature inside the refrigerator is 5° C. or higher, the solenoid valve 48 is closed, and the refrigerant for cooling and the refrigerant for refrigerating and freezing are compressed from the main suction [] 21c and the sub-intake 21d, respectively.
21, and the main compression part 21a (E-+A>
and is compressed in the sub compression section 21b (1→B). The compressed refrigerant gases are combined, discharged from the compressor 21, and liquefied in the condenser 22 (A→C, B10).

The liquefied refrigerant is evaporated in the cooling evaporator 24 (D-+E) by the action (C→D) of the sharp tube 23, which is a pressure reducing device. Here, the vapor phase refrigerant of saturated gas ([: point) and the liquid phase refrigerant of saturated liquid (point G) are separated in the Akicomulator 25, and the vapor phase refrigerant is discharged from the vapor phase refrigerant discharge port 25a for cooling. The flow is sucked into the main suction port 21C of the flow compressor 21 through the suction pipe 45 and compressed (F→△). The liquid phase refrigerant is discharged from the liquid phase refrigerant I11 outlet 25b, the pressure is reduced by the constant pressure expansion valve 27 which is a pressure reducing device (G-+1-1), and the liquid phase refrigerant is evaporated in the freezing and refrigerating evaporator 28 (1''→I). The refrigerant discharged from the evaporator 28 for freezing and refrigeration passes through the suction pipe 46 for freezing and refrigeration through a check valve 29 to the auxiliary suction port 2 of the compressor 21.
1d and is compressed (1-+8>. Here, point CΔ is the state of the refrigerant at the discharge port C of the main compression section 21a, point 8 is the state of the refrigerant at the discharge port of the sub-compression section 211), and point 0 is the state of the refrigerant at the discharge port of the sub-compression section 211. The state of the refrigerant on the high pressure side of the key I7 pillar rib 23, the 0 point is the state of the refrigerant on the discharge side of the key pillar duplex 23, the E point is the state of the refrigerant at the suction port to the agicomulator 25, and the 1 point is the state of the refrigerant in the accumulator 25. The state of the refrigerant at the gas phase refrigerant discharge port 25a,
Point G is the liquid phase refrigerant 11 outlet 25 of Ar 1-L mulrator 2.
b ``C'' represents the state of the refrigerant, 14 represents the state of the refrigerant on the high pressure side of the constant pressure expansion valve 27, and ■ represents the frozen state of Tagawa LJ'C' of the constant pressure expansion valve 27. From the setting of 27, the evaporation power of the refrigeration evaporator 28 is set to 0.5 kg.
/cm, it is possible to maintain the refrigerant temperature at -21°C and perform the ice-making function. Also 1-1
Because the difference between the [points] and one point is large, the compression capacity is low.

Here, set the temperature inside the refrigerator (for example, 5℃)
When the temperature drops below, the wet water 49 will leak, the solenoid valve 48 will be de-energized, the C1 communication pipe 47 will be disconnected, and the cold W for cooling will be turned off.
At the same time, the refrigerant is introduced from the main suction IJ 21 G into the main compression part 21a of the compressor 21 through the cooling suction pipe 45, and at the same time, the refrigerant passes from the communication pipe 47 through the freezing and refrigerating suction pipe 46.
It is introduced into the sub-compression section 211) from the sub-intake port 21d, and all of the compressors 21 (all 10 cylinders in this embodiment) can be used for cooling.

In addition, in this case, the suction pressure of the sub compression section 21b increases J-
At the same time, the reversing valve 729 closes and the refrigeration evaporator 2
When the pressure inside the valve 8 starts to rise, the constant pressure expansion valve 27 closes. In this way, by closing the valves at both ends, the pressure of the refrigerant in the evaporator 28 for freezing and refrigerating is maintained at a pressure (1) lower, and a low humidity state is maintained for a while.

In addition, in the automatic air conditioner, the compressor 21 is maintained and controlled by various signals as is well known, but when the compressor 21 is stopped due to this maintenance control, the evaporation in the cooling evaporator 24 is Although the pressure gradually increases, the pressure inside the freezing and refrigerating evaporator 28 does not rise in the same way as above.

The present invention is not limited to the seventh embodiment, and can be modified in various ways as described below.

1) The auxiliary compression section 211) of the FF compressor 21 does not have a single cylinder capacity, and can be increased as needed. For example, 1
The two cylinders behind cylinder 0 are used as the sub-compression section 211), and the remaining 8
The cylinder may be used as the main compression section 21a. In addition, by increasing the capacity of the auxiliary compression section 211, the refrigeration cold R
Capacity is also improved, making it possible to apply it to refrigeration equipment during freezing.

2) In this embodiment, the compressor 21 uses a multi-cylinder type divided into a main compression section 21a and a sub-compression section 21b;
T! First, compression (by changing the refrigerant flow ratio between the cooling suction pipe 45 and the freezing/refrigeration suction pipe 4G of the suction section 21), a multi-cylinder compressor other than the J type can also be applied.

3) As a pressure reducing device, in addition to the capillary tube 23 and the constant pressure expansion valve 27, a normal thermal expansion valve, a solenoid valve, a fixed throttle valve, an orifice throttle valve, or any of the following pressure reducing devices may be used. It may also be used.

4) Temperature Ron 4-49, which detects the temperature inside the refrigerator, detects the surface temperature of the evaporator 28 for freezing and refrigeration. This can be done in the same way as b.

5) The present invention (J, limited to automobile use, domestic use 1b)
It can be applied to factory cooling equipment.

6) In addition to the compressor having the above-described structure, the present invention provides a system in which, after introducing the suction refrigerant into the swash plate chamber, the refrigerant is introduced into the suction chamber of the housing 8 through the gaps between the bolt holes 5 of ports 1 to 53 (in the above embodiment). After that, the compressed refrigerant is introduced into the discharge chamber (8f part in the example).
Even if a compressor having a structure similar to that shown in section 8d of the above embodiment is used, there will be no J, let alone no C.

[Brief explanation of drawings]

All the drawings show an actual example of the present invention. Fig. 1 is a refrigeration (Noikl diagram), Fig. 2 is a cross-sectional view of the refrigerant circuit a5 of the compressor in the axial direction, and Fig. 3 is a △-△ cross-section of Fig. 2. Figure 4 is a seven-linyl diagram of refrigeration → Noikle.・Main intake port 2
1d...Sub suction 1] 22...Condenser 23...Capillary tube 24...Cold 1/j river evaporator 2j
)...Accumulator 21...Constant pressure expansion valve 28.
・・Evaporator for freezing and refrigeration 29・・Reverse 1F valve 45・・
・Suction piping for cooling 46... Suction piping for freezing and refrigeration 4
7...Communication pipe 48...Electric V41ft Agent Ken Ishiguro-3rd

Claims (1)

[Claims] 1) A compressor equipped with a main suction port and a sub suction port, and a device configured to convert gas refrigerant discharged from the compressor into liquid refrigerant.
), a cooling pressure reducing device provided to expand the liquid refrigerant into atomized refrigerant, and a cooling evaporator that evaporates the atomized refrigerant to cool the surrounding air. And, the refrigerant discharged from the cooling evaporator is divided into gas phase refrigerant and liquid phase refrigerant! a cooling refrigerant suction pipe that connects only the gas phase refrigerant from the accumulator to the main suction port; and a cooling refrigerant suction pipe that connects only the gas phase refrigerant from the accumulator to the main suction port, and the cooling refrigerant that connects only the liquid phase refrigerant inside the accumulator to a mist refrigerant. A refrigeration pressure reducing device installed in parallel with the suction pipe, and a refrigeration evaporator that performs refrigeration by evaporating atomized refrigerant from the refrigeration pressure reducing device, and the refrigeration evaporator is connected to the sub-intake. A cooling and refrigeration system consisting of a refrigerant and suction pipe connected to the mouth. 2) The compressor is a multi-cylinder compressor, and comprises a main compression part connected to the main suction port and a sub-compression part connected to the sub-intake. The cooling and refrigerating device according to item 1. 3) A patent characterized in that the refrigerant suction pipe for refrigeration is provided with a valve arranged so as to prevent the refrigerant from passing in only one direction from the evaporator for refrigeration to the suction side of the sub-compression section. The cooling and refrigerating device according to claim 1. 4) A communication pipe provided so that the refrigerant suction pipe for refrigeration and the refrigerant suction pipe for cooling are communicated with each other, and an electromagnetic valve provided in J for opening and closing the communication pipe. A cooling and refrigerating device according to claim 1, characterized in that: