JPH0783528A - Refrigerator - Google Patents

Abstract

PURPOSE:To obtain a small-sized Billmyer heat pump type refrigerator in which gas flow loss, mechanical loss, vibration and noise are all small. CONSTITUTION:Gases in a high temperature side casing 8 and a low temperature side casing 23 are always circulated in one direction by rotations of feeders 15, 25. Heat in the casing 8 is applied in a high temperature heat exchanger 9 provided integrally with the casing 8 of a high temperature unit, the gas is fed to a first intermediate temperature heat exchanger 11, and heat exchanged as prescribed. Similarly, predetermined heat exchange is conducted in a second intermediate temperature heat exchanger 29 of a low temperature side unit, low temperature gas in the casing 23 pumps heat from a low temperature heat exchanger 27 to obtain necessary low temperature for a refrigerator. Gas pressures in the casings 8, 23 are transmitted to each other through a guide pressure tube 7. Operating gas is always circulated in one direction, the exchangers 9, 11, 27, 29 are respectively provided integrally with the casings 8, 23, and losses are small and sizes can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerating apparatus using a gas cycle in which heat is externally applied to a gas in a circuit by a high temperature heat exchanger and external heat is pumped up and cooled by a low temperature heat exchanger.

[0002]

2. Description of the Related Art As a conventional refrigerating apparatus of this type, a Bilmeier cycle heat pump as disclosed in JP-A-1-137164 is known, and the technique disclosed in this publication is shown in FIG. As described above, the cylinder 70 and the displacer 71 form a working space of gas, and the volume of the working space is changed by the reciprocating motion of the displacer 71 to transfer the working gas. The heat exchangers 75 and 76 are allowed to pass through.

[0003]

However, this conventional Bilmeier cycle heat pump has the following drawbacks.

(1) Since parts such as a displacer, a crankshaft and a connecting rod are required, the device becomes large and heavy.

(2) Vibration and noise are large because of the reciprocating part.

(3) Since the gas passing through the regenerator is a reciprocating flow, the flow loss is large.

(4) Since a friction sliding portion (reference numeral 77, etc.) needs to be sealed, mechanical loss is large.

(5) Since the cylinder and the heat exchanger are provided separately, the size of the device becomes large.

On the other hand, Japanese Patent Laid-Open No. 5-18623 discloses that
A Bilmeier cycle heat pump has been proposed in which the number of cylinders is set to one to reduce the size of the device, but the drive mechanism is complicated and the above-mentioned problems cannot be sufficiently solved.

Therefore, an object of the present invention is to provide a Vilmeier cycle heat pump type refrigerator having a small gas flow loss, small mechanical loss, vibration and noise, and a small refrigerator. is there.

[0011]

In order to achieve the above object, according to the present invention, a high temperature side unit and a low temperature side unit are connected to each other by a pressure guiding tube, and the high temperature side unit includes a high temperature side casing, The high temperature side casing is provided with a transfer body for transferring the gas in the high temperature side casing in one direction by rotation, the high temperature side casing is a high temperature heat exchanger for applying heat to the gas in the high temperature side casing, and the high temperature side casing A first intermediate temperature heat exchanger that extracts heat from the gas is integrally provided,
The low temperature side unit includes a low temperature side casing and a transfer body that transfers gas in the low temperature side casing in one direction by rotation, and the low temperature side casing is cooled by the gas in the low temperature side casing. A heat exchanger and a second intermediate temperature heat exchanger for extracting heat from the gas in the low temperature side casing are integrally provided.

[0012]

According to the present invention, the gas in the high temperature side casing and the gas in the low temperature side casing are always circulated in one direction by the rotation of each transfer body. In the high temperature side unit, heat is applied to the gas in the casing in the high temperature heat exchanger integrally provided in the high temperature side casing, and the gas is passed through the first intermediate temperature heat exchanger to perform the required heat exchange. . Similarly, in the low temperature side unit, the required heat exchange is performed by passing through the second middle heat exchanger, and the low temperature gas is pumped up by the low temperature gas to obtain the low temperature required for the refrigerator. .
The pressures of the gas inside the high temperature side casing and the low temperature side casing are transmitted to each other via a pressure guiding tube.

Moreover, in the present invention, the working gas is always circulated in one direction, and the heat exchangers are integrally provided in the high temperature side casing and the low temperature side casing, respectively, so that the gas flow loss can be reduced. The mechanical loss, vibration and noise can be reduced and the size can be reduced.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A refrigerating apparatus according to an embodiment of the present invention will be described below with reference to FIGS. 1 to 6 of the accompanying drawings. First, referring to FIGS. 1 to 4, a first embodiment of the present invention will be described. The refrigerating apparatus according to the above will be described.

As shown in FIGS. 1 and 2, the refrigerating apparatus 1 according to the first embodiment includes a high temperature side unit 3 and a low temperature side unit 5, and a guide connecting the high temperature side unit 3 and the low temperature side unit 5. It is composed of a pressure tube 7. A working gas (hereinafter simply referred to as “gas”) such as a helium (He) gas is enclosed in each unit 3, 5.

The high temperature unit 3 includes a high temperature casing 8
And a transfer body 15 for transferring the gas in the high temperature side casing 8 in one direction by rotation.
Is integrally provided with a high temperature heat exchanger 9 for applying heat to the gas in the high temperature side casing 8 and a first intermediate temperature heat exchanger 11 for taking out heat from the gas in the high temperature side casing 8.
The high temperature side casing 8 is formed in a cylinder shape, and the rotating shaft 15a of the transfer body 15 is axially supported by the central axis of the cylinder, and the rotating shaft 15a is driven by the motor 16. The drive of the motor 16 is controlled by the motor controller 17. The transfer body 15 is formed to have a substantially semicircular cross section, and slides along the inner peripheral surface of the cylinder to transfer the gas enclosed in the casing.

FIG. 3 shows the high temperature side casing 8 and the transfer body 1.
As shown in FIG.
A large number of fins 18 are formed in a donut shape on the inside of, and a large number of slits 19 are formed in the transfer body 15 so as to correspond to the fins 18.
It is arranged so as to be inserted into the casing 9 to enhance the heat conduction efficiency between the high temperature side casing 8 and the gas. Further, a heat insulating material 20 is interposed between the high temperature heat exchanger 9 and the first intermediate temperature heat exchanger 11, and a portion of the high temperature side casing 8 between the high temperature heat exchanger 9 and the first intermediate temperature heat exchanger 11 is provided. Is insulated.

The high temperature heat exchanger 9 is integrally provided in a part of the high temperature side casing 8, and is formed in the vertical half of the cylinder of the high temperature side casing 8 in this embodiment. In the high temperature side heat exchanger 9, a heating wire 10 is embedded in the high temperature side casing 8, and the casing 8 itself is heated by the supply of electric power from the power supply device 12 to heat the gas in the casing 8. . The high-temperature heat exchanger 9 is not limited to be heated by a heating wire, but may be one that forms a passage in the casing 8 and causes a heat medium to flow through the passage to heat the passage.

The first intermediate temperature heat exchanger 11 is integrally provided on the other part of the casing 8. In the present embodiment, it is formed on the remaining vertical half of the cylinder of the casing 8, and the cylinder 8 part is formed. Passage holes 14 for the heat medium are formed to exchange heat with the casing 8 itself as a medium.

A load such as an indoor heater or a water heater is connected to the first intermediate temperature heat exchanger 11, but in the present embodiment, it is connected to the indoor heater 21 and the heat medium in the passage hole 14 is The gas in the cylinder 8 is heated by the heat and is circulated. A fan 22 for blowing air is arranged in the vicinity of the indoor heater 21.

The low temperature side unit 5 includes the low temperature side casing 2
3 and a transfer body 25 that transfers the gas in the low temperature side casing 23 in one direction by rotation, the low temperature side casing 23 is a low temperature heat exchanger 27 that is cooled by the gas in the low temperature side casing, A second intermediate temperature heat exchanger 29 that takes out heat from the gas in the low temperature side casing 23 is integrally provided.

The low temperature side casing 23 is formed in the same cylinder shape as the high temperature side casing 8, the rotary shaft 25a of the transfer body 25 is rotatably supported by the center axis of the cylinder, and the rotary shaft 25a is driven by a motor 26. Has been done.
The drive of the motor 26 is controlled by the motor controller 17 described above.

The transfer body 25 has a substantially semicircular cross section, and slides along the inner peripheral surface of the cylinder to transfer the gas enclosed in the casing. The low temperature side casing 23 and the transfer body 25 have the same configuration as the high temperature side casing 8 and the transfer body 15 shown in FIG.

The low temperature heat exchanger 27 comprises the low temperature side casing 2
In this embodiment, the cooling medium passage hole 3 is provided in the vertical half of the cylinder of the low temperature side casing 23.
0 is formed, and heat is exchanged using the low temperature side casing 23 itself as a medium. This device draws external heat in the low temperature heat exchanger 27,
It contributes to cooling as a refrigerator. The low-temperature heat exchanger 27 is connected to the indoor unit 28 of the cooling device in this embodiment, and the refrigerant flowing through the refrigerant passage hole 30 is circulated between the indoor unit 28 and the refrigerant.

The second intermediate temperature heat exchanger 29 is the first heat exchanger 1
As in the case of No. 1, it is integrally provided in a part of the low temperature side casing 23, and in this embodiment, a passage hole 31 for the heat medium is formed in approximately half of the cylinder of the low temperature side casing 23. The casing 23 itself is used as a medium for heat exchange.

A load such as an indoor heater or a water heater is connected to the second intermediate temperature heat exchanger 29, but in the present embodiment, it is connected to the indoor heater 21 which is common to the first intermediate temperature heat exchanger. , And also circulates to the indoor heater 21 after passing through the first medium temperature heat exchanger.

The pressure guiding tube 7 connects the high temperature side casing 8 and the low temperature side casing 23 in the first intermediate temperature heat exchanger 11 and the second intermediate temperature heat exchanger 29, and the inside of each casing 8, 23 is connected. It is transmitting gas pressure.

Next, the operation of this embodiment will be described.

In this embodiment, the gas in the casings 8 and 23 is unidirectionally transferred by the transfer members 15 and 25 as shown by the arrow in FIG. The operation of each unit will be described below for each heat transfer state with reference to FIGS. 4 and 5.

(1) In (1) of FIG. 4, the heat radiation state of the first intermediate temperature heat exchange unit 11 in the high temperature side unit is shown.

In this state, in the high temperature side unit 3, the gas is located in the first heat exchanger 11 in the right half of the high temperature side casing 8, and the heat of the gas is transmitted through the wall of the high temperature side casing 8. It is transferred to the heat medium flowing through the passage hole 14 and heats the heat medium. This heat medium is circulated to the heater 21 and contributes to heating.

Here, in the low temperature side unit 5, since the second medium temperature heat exchanger 29 radiates heat and the gas in the low temperature side casing 23 is heated, the internal pressure of the low temperature side unit 5 rises,
The temperature also rises. The high pressure in the low temperature side unit 5 is the pressure guiding tube 7
Is transmitted to the high temperature side unit 3 via, and the internal pressure and temperature of the high temperature side unit 3 rise.

Then, the heat of the gas heated to a high temperature in the first intermediate temperature heat exchanger 11 on the high temperature side is radiated.

(2) In (2) of FIG. 4, the heat radiation state of the second intermediate temperature heat exchanger 29 in the low temperature side unit 5 is shown.

In this state, in the high temperature unit 3, the high temperature heat exchanger 9 radiates heat and the gas absorbs heat, so that the temperature of the gas in the high temperature casing 8 rises and the pressure is increased. The high pressure in the high temperature side casing is transmitted to the low temperature side unit 5 via the pressure guiding pipe 7, and the internal pressure and temperature in the low temperature side casing rise.

The second medium temperature heat exchanger 29 absorbs heat and the heat of the gas is radiated. The second medium-temperature heat exchanger 29 is connected to a heater common to the first medium-temperature heat exchanger 11 on the high temperature side, and the temperature of this load-side medium rises.

(3) In (3) of FIG. 4, the endothermic state of the gas in the high temperature heat exchanger 9 in the high temperature side unit 3 is shown.

In this state, in the low temperature side unit 5, since the low temperature heat exchanger 27 absorbs the gas heat, the internal pressure of the low temperature side unit 3 decreases and becomes low pressure, and the temperature also decreases. The low pressure of the low temperature side unit 5 is transmitted to the high temperature side unit 3 via the pressure guiding pipe 7, whereby the internal pressure and temperature of the high temperature side casing 8 decrease.

In the high temperature heat exchanger 9 of the high temperature side unit 3, heat is generated by the heating wire 10 and the gas in the high temperature side casing absorbs heat.

(4) In (4) of FIG. 4, the heat absorption state of the low temperature heat exchanger 27 in the low temperature side unit 5 is shown.

In this state, in the high temperature unit 3, the first intermediate temperature heat exchanger 11 absorbs heat, the temperature of the gas drops, and the pressure drops. The low pressure of the high temperature side unit 3 is transmitted to the low temperature side unit 5 via the pressure guiding pipe 7, whereby the internal pressure and temperature of the low temperature side unit 5 decrease.

In the low temperature heat exchanger 27 of the low temperature side unit 5, heat is absorbed from the refrigerant flowing through the refrigerant passage hole 30 and the cooled refrigerant is supplied to the indoor unit of the cooling device. As a result, the refrigerator operates.

In this apparatus, the above steps (1) to (4) are repeated.

According to this embodiment, however, the gas is always circulated in one direction, and since a rotor or the like for changing the volume is not required, the flow loss of the gas can be reduced and the mechanical loss can be reduced. The optical loss can be reduced and the size can be reduced.

Further, since there is no reciprocating portion, vibration and noise are small, and the passing gas is a unidirectional flow, and since it is not a reciprocating flow, the flow loss is small compared to the conventional reciprocating flow, and the friction slide of a displacer or the like Since there is no moving part, no seal is required, so that the structure can be simplified.

Further, since the gas flows only in the casings 8 and 23 and does not require a gas circuit as in the conventional case, the structure is simple and the device can be downsized.

Further, in the present embodiment, since the regenerative heat exchanger is not used, the structure can be easily and downsized.

Next, a refrigerating apparatus 41 according to a second embodiment of the present invention will be described with reference to FIGS. 5 and 6, but in the second embodiment, the high temperature side casing and the low temperature side casing are integrated into one unit. It is configured to form one cylinder. Since the other parts are substantially the same as those of the refrigeration system 1 according to the first embodiment described above, the same parts as those of the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

In the refrigerating apparatus 41 according to the second embodiment, the high temperature side casing 8 has a cylinder shape, the low temperature side casing 23 has a similar cylinder shape, and these are stacked to form an integral cylinder shape. A heat insulating material is interposed as a partition wall 43 between the cylinders, and the low temperature unit 3
The high temperature side unit 5 is thermally insulated, and a part of the partition wall is cut out, and the cutout 45 forms a pressure guiding portion (pressure guiding tube).

According to the second embodiment, since the high temperature unit and the low temperature unit are formed in one casing, the structure can be further simplified and downsized.

Further, since the pressure guiding tube 7 is formed inside the casing by notching the partition wall inside the casing, the structure can be further simplified and the size can be reduced.

The present invention is not limited to the above-mentioned embodiments, but can be variously modified without departing from the gist of the present invention.

For example, in the present invention, the regenerative heat exchanger is not essential, but the regenerative heat exchanger may be provided in a part of the casing or the transfer body.

[0054]

According to the refrigerating apparatus of the present invention, the high temperature side unit and the low temperature side unit are connected to each other by a pressure guiding tube,
Since the gas in each casing is circulated in one direction by each transfer body, a rotor or the like for changing the volume is not required, so the gas flow loss can be reduced, the mechanical loss is small and the size is small. Can be

Further, since there is no reciprocating portion, vibration and noise are small, and the gas passing through the regenerator (first and second regenerator units) is a unidirectional flow, not a reciprocating flow, so a conventional reciprocating flow is used. The flow loss is smaller than that of the above, and since there is no friction sliding portion such as a displacer, a seal is not required, so that the structure can be simplified.

Furthermore, since the working gas is always circulated in one direction and the heat exchangers are integrally provided in the high temperature side casing and the low temperature side casing, respectively, the gas flow loss can be reduced and the mechanical loss is reduced. Small, reducing the number of parts,
The weight can be reduced and the size can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a schematic configuration of a refrigerating apparatus according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the casing shown in FIG.

FIG. 3 is a perspective view showing a part of the casing shown in FIG.

FIG. 4 is a diagram for explaining the operation of the present embodiment.

FIG. 5 is a perspective view showing a schematic configuration of a refrigerating apparatus according to a second embodiment of the present invention.

6 is a vertical cross-sectional view of the casing shown in FIG.

FIG. 7 is a diagram showing a configuration of a conventional refrigeration system using a Bilmeier heat pump.

[Explanation of symbols]

 1 Refrigerating apparatus according to the first embodiment 3 High temperature side unit 5 Low temperature side unit 7 Pressure guide tube 8 High temperature side casing 9 High temperature heat exchanger 11 First medium temperature heat exchanger 15 Transfer body 23 Low temperature side casing 25 Transfer body 27 Low temperature heat exchanger 29 Second Medium Temperature Heat Exchanger 41 Refrigerating Apparatus According to Second Embodiment

Claims (1)

[Claims] 1. A high temperature side unit and a low temperature side unit are connected to each other by a pressure guiding tube, and the high temperature side unit is a high temperature side casing and a transfer for transferring gas in the high temperature side casing in one direction by rotation. And a first intermediate temperature heat exchanger for extracting heat from the gas in the high temperature side casing, wherein the high temperature side casing integrally provides a high temperature heat exchanger for applying heat to the gas in the high temperature side casing. The low temperature side unit includes a low temperature side casing and a transfer body that transfers the gas in the low temperature side casing in one direction by rotation, and the low temperature side casing is cooled by the gas in the low temperature side casing. A refrigerating apparatus comprising a low temperature heat exchanger and a second intermediate temperature heat exchanger for taking out heat from the gas in the low temperature side casing, integrally.