JP2667487B2 - Air conditioning - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial application field> The present invention relates to a cooling and heating device used as an air conditioner.

<Prior Art> A conventional cooling and heating apparatus includes a pump for exclusively transferring a high-temperature medium from a medium-temperature side heat exchanger for heat radiation and a pump for exclusively transferring a low-temperature medium from a low-temperature side heat exchanger for heat absorption. The operation is performed in a cycle in which the indoor heat exchanger and the outdoor heat exchanger are alternately switched and connected by a switching valve, and is proposed in, for example, JP-A-61-44254.

In this example, the flow resistance in the high temperature medium conduit and the low temperature medium conduit changes during the cooling operation and the heating operation. In many cases, the indoor heat exchanger is independently installed in a remote place.

<Problem to be solved by the invention> However, in such a case, the difference in the flow resistance becomes large. Therefore, in order to transfer the medium corresponding to each cycle, the pumping capacities of the two must be equal. Under these circumstances, excessive pumping capacity is required, which is a factor that reduces the energy efficiency of the device.

In view of the above situation, the present invention reduces the energy consumption of a circulation pump, which is a factor that lowers the energy efficiency of the device, and also employs an inexpensive refrigerator with a small number of parts, and combines it with a simple circuit configuration. The purpose is to provide.

<Means for Solving the Problems> A high-temperature side displacer 1 and a low-temperature side displacer 2 that reciprocate out of phase, and a high-temperature side partitioned by the high-temperature side displacer 1 into a high-temperature room 3 and a medium-temperature room 4 A cylinder 5, a high-temperature side heat exchanger 6 which communicates with the high-temperature chamber 3 and is heated from the outside, a regenerator 7 and a medium-temperature side heat exchanger disposed between the heat exchanger 6 and the medium-temperature chamber 4 8, a low temperature side cylinder 11 divided into a low temperature chamber 9 and a medium greenhouse 10 by the low temperature side displacer 2, a low temperature side heat exchanger 12 arranged between the low temperature chamber 9 and the medium greenhouse 10. A refrigerator is composed of a regenerator 13 and a communication chamber 14 that connects the inside greenhouses 4 and 10 to each other, while the heat radiating heat exchanger 8 and the heat absorbing heat exchanger 12 of the refrigerator 15 are used for indoor heat. In the cooling and heating device connected to the exchanger 16 and the outdoor heat exchanger 17 by piping, the heat radiating heat exchanger 8 The medium that has passed through to the indoor heat exchanger 16 during heating, while leading to the outdoor heat exchanger 17 during cooling, the medium that has passed through the heat absorption heat exchanger 12 to the outdoor heat exchanger 17 during heating, during cooling The first switching valve 18 for guiding to the indoor heat exchanger 16 and the medium passing through the indoor heat exchanger 16 are guided to the heat radiating heat exchanger 8 during heating, and to the heat absorbing heat exchanger 12 during cooling, Outdoor heat exchanger 17
A second switching valve 19 for guiding the medium that has passed through to the heat exchanger 12 for heat absorption during heating and to the heat exchanger 8 for heat radiation during cooling,
The first switching valve 18 passes through the indoor heat exchanger 16 and the second switching valve 19
A circulating pump 28 is provided in a pipe leading to, and a circulating pump 29 is provided in a pipe extending from the first switching valve 18 to the second switching valve 19 through the outdoor heat exchanger 17.

<Operation> The refrigerator 15 of the apparatus of the present invention employs a Bloomier cycle known in the technical field of low temperature engineering, and employs an external heating method in which the working gas is forcibly heated by the high temperature side heat exchanger 6. By doing so, the low temperature medium is taken out from the low temperature side heat absorption heat exchanger 12, the medium temperature medium is taken out from the medium temperature side heat radiation heat exchanger 8, and the low temperature medium is used for cooling and the medium temperature medium is used for heating. That is, during the cooling operation, the switching cycle between the low-temperature side heat absorbing heat exchanger 12 and the indoor side heat exchanger 16 by the switching valves 18 and 19 and the circulating pumps 28 and 29 is performed. A closed cycle connecting the outside heat exchanger 17 is formed to release the heat of the low-temperature medium into the room by the indoor heat exchanger 16 for cooling, and to discharge the heat of the medium-temperature medium outside by the outdoor heat exchanger 17. ,
During the heating operation, the switching valves 18 and 19 are switched to form a closed cycle that connects the heat exchanger 8 for radiating the intermediate temperature side and the indoor heat exchanger 16 with the switching valves and the circulation pumps 28 and 29. The heat of the medium temperature medium is released to the room by the inner heat exchanger 16 to heat the room, and the heat of the low temperature medium is discharged to the outside by the outdoor heat exchanger 17.

<Embodiment> An embodiment of the present invention will be described with reference to the drawings. Reference numeral 20 denotes a rotating rod 22 that rotates clockwise about a rotating shaft 21, and a swinging rod pivotally supported by a tip 23 of the rotating rod. A crank portion composed of the moving rods 24 and 25 is housed in the machine room 26 of the refrigerator 15.

Then, the refrigerator 15 has a phase of 7
The high-temperature side displacer 1 and the low-temperature side displacer 2 that reciprocate at 0 °, the high-temperature side cylinder 5 that is divided into the high-temperature chamber 3 and the middle greenhouse 4 by the high-temperature side displacer 1, and the high-temperature chamber 3 A high temperature side heat exchanger 6, a heat accumulator 7 and a middle temperature side heat radiation heat exchanger 8 which are sequentially arranged over the middle greenhouse 4 and a low temperature side sprayer 2 are divided into a low temperature chamber 9 and a middle greenhouse 10. Low-temperature side cylinder 11 and low-temperature chamber 9
From the low temperature side endothermic heat exchanger 12 and the regenerator 13 and the auxiliary medium temperature side heat exchanger 27, which are sequentially arranged over the middle greenhouse 10 and the communication chamber 14 that connects the two middle greenhouses 4 and 10. I have it.

The role of both displacers 1 and 2 is to move the enclosed working gas (helium gas, nitrogen gas, etc.) between the high temperature chamber 3 and the middle greenhouse 4, and between the low temperature chamber 9 and the middle greenhouse 10. Since it does not compress or expand the working gas, there is an advantage that precise processing is not required and vibration is reduced during operation.

28 is a circulating pump dedicated to the indoor side provided between the first switching valve 18 and the indoor heat exchanger 16, and 29 is an outdoor circulating pump provided between the second switching valve 18 and the outdoor heat exchanger 17. A first four-way switching valve 18 that alternately guides a medium temperature medium and a low temperature medium to an indoor heat exchanger 16 with an indoor fan 30 and an outdoor heat exchanger 17 with an outdoor fan 31 by a pump, and an indoor side A second four-way direction in which the medium-temperature medium and the low-temperature medium that have exchanged heat between the heat exchanger 16 and the outdoor heat exchanger 17 are alternately switched to and guided to the auxiliary medium-temperature side heat exchanger 27 and the low-temperature side heat-absorption heat exchanger 12. The switching valve 19 is provided in the middle temperature pipe 32 and the low temperature pipe 33, and the outdoor unit 35 and the indoor unit are provided.
36 are connected by an extension connection pipe 37.

As described above, when the high temperature side heat exchanger 6 is heated to about 700 ° C. by the burner 34 and the rotary shaft 21 is driven by a small output motor (not shown), the high temperature side displacer 1 descends from the position shown in the figure. At the same time, the low temperature side displacer 2 located at the top dead center as shown in the drawing starts to move to the left. High temperature side displacer 1
When it reaches the bottom dead center and starts to rise again, the working gas in the high temperature chamber 3 is pushed out by the high temperature side displacer 1,
Heated to about 700 ° C. by the burner 34 passes through the regenerator 7. When the working gas, which has accumulated high heat in the heat storage device 7 and the temperature of which has dropped, passes through the heat exchanger 8 for radiating heat on the intermediate temperature side, the heat exchanger 8 and the auxiliary heat medium side heat exchanger 27 connected to the heat exchanger 8 High temperature piping
The medium in 32 is heat-exchanged to raise the temperature of this medium to about 80 ° C., and the working gas whose temperature has dropped moves to the middle greenhouse 4.

During this time, the low-temperature side displacer 2 continues to move to the left, and the working gas pushed out from the middle greenhouse 10 and the working gas moved to the middle greenhouse 4 are mixed and the auxiliary medium-temperature side heat exchanger 27 and the regenerator 13 are stored. Then, the working gas flows into the low-temperature chamber 9 through the heat exchanger 12 for absorbing heat on the low-temperature side, and in this low-temperature chamber 9 having a large internal volume, the pressure of the working gas drops and the temperature drops. After that, when the low-temperature side displacer 2 reaches the bottom dead center and starts moving rightward again, when the low-temperature working gas is pushed out of the low-temperature chamber 9 and passes through the low-temperature side endothermic heat exchanger 12, low-temperature piping
33 This medium exchanges heat with the medium to cool this medium to about -10 ° C, and the cold heat is stored in the regenerator 13.
Flow into.

The regenerator 7 is for increasing the operating efficiency by heating and cooling the working gas from the medium temperature room 4 to the high temperature room 3 and the regenerator 13 when the working gas moves from the medium temperature room 10 to the low temperature room 9. .

As described above, in the high-temperature side heat exchanger 6, the working gas is externally heated by the parner 34 so as to maintain the high temperature, and in the middle-temperature side heat radiation heat exchanger 8, the working gas is externally controlled so that the temperature of the working gas becomes constant. A refrigerator 15 using a so-called Plumier cycle in which a low temperature part is generated by cooling and moving both displacers 1 and 2 in such a state is used, and the heat absorption in this low temperature part is cooled by the heat exchanger 12 for low temperature side absorption. In addition, the heat generated by the heat exchanger 8 for heat dissipation on the intermediate temperature side is used for heating.

That is, during the cooling operation, the first and second four-way switching valves 18, 19 are set to the solid line state so that the low temperature medium cooled in the low temperature side heat absorption heat exchanger 12 is cooled by the low temperature pipe 33 → First
The four-way switching valve 18 → circulation pump 28 → the indoor heat exchanger 16−the second four-way switching valve 19−the low-temperature side heat-absorbing heat exchanger 12 forms a closed cycle that flows in an annular manner. In addition to cooling the room, the high-temperature medium heated from the auxiliary medium-temperature heat exchanger 27 through the medium-temperature heat-dissipating heat exchanger 8 is connected to a high-temperature pipe.
32 → first four-way switching valve 18 → circulation pump 29 → outdoor heat exchanger 17 → second four-way switching valve 19 → auxiliary intermediate-temperature heat exchanger 27 to form a closed cycle that flows annularly and outdoor heat exchange The heat is exhausted to the outside of the room by the vessel 17.

Further, during the heating operation, by switching the first and second four-way switching valves 18 and 19 to the broken line state, the auxiliary intermediate temperature side heat exchanger 27 passes through the intermediate temperature side heat radiation heat exchanger 8 as shown by the broken line arrow. The heated high-temperature medium is supplied to the high-temperature pipe 32 → the first four-way switching valve 18 → the circulation pump 28 → the indoor heat exchanger 16 → the second four-way switching valve 19 →
While forming a closed cycle that flows in an annular shape with the auxiliary intermediate temperature side heat exchanger 27 to heat the room by the indoor side heat exchanger 16, the low temperature medium cooled by the low temperature side heat absorption heat exchanger 12 is a low temperature pipe.
33 → first four-way switching valve 18 → circulation pump 29 → outdoor heat exchanger
17 → the second four-way switching valve 19 → the low-temperature side heat-absorbing heat exchanger 12 forms a closed cycle that flows in an annular manner, and the outdoor-side heat exchanger 17 discharges heat to the outside.

The circulation pump 28 may be provided in a pipe path from the switching valve 18 to the switching valve 19 via the indoor heat exchanger 16, but the indoor unit
It is not preferable from the viewpoint of noise on the 36 side, and it is preferable to install it on the outdoor unit 35 side.

In addition, when the circulation pump 28 is provided between the switching valve 19 and the extension connection pipe 37, if the flow resistance in the extension connection 37 or in the indoor heat exchanger 16 increases, the suction negative pressure increases, and air bubbles are generated. It is not desirable to cause the pump performance to deteriorate, and the positions illustrated as the embodiments of the present invention are optimal.

The circulation pump 29 located in the outdoor unit 35 is
It may be provided in a conduit from the switching valve 18 to the switching valve 19 via the outdoor heat exchanger 17, but in consideration of the above-described reduction in pump performance due to generation of bubbles due to large flow resistance, the present invention is implemented. The position shown as an example is optimal.

<Effects of the Invention> As described above, the cooling / heating device of the present invention provides a circulation pump 28 in a dedicated pipe for transferring a medium to the indoor heat exchanger 16 in both the cooling operation and the heating operation, and Since a circulation pump is provided in a dedicated pipe for transferring the medium to the outdoor heat exchanger 17, the most suitable pump can be selected for each dedicated pipe. Therefore, according to the length of the extension connection pipe 37 connected to the indoor heat exchanger 16, only the circulation pump 28 may be changed to one having a performance suitable for it.

As described above, the circulation pump most suitable for the device can be selected, so that the energy consumption can be reduced and the cooling and heating device can be energy efficient.

[Brief description of the drawings]

The drawing is a piping diagram showing an embodiment of the present invention. 1 ... High temperature side displacer, 2 ... Low temperature side displacer, 3 ... High temperature chamber, 4,10 ... Medium greenhouse, 5 ... High temperature side cylinder, 6 ... High temperature side heat exchanger, 7 ... Heat storage Bowl, 8
...... Medium temperature side heat dissipation heat exchanger, 9 ...... Low temperature chamber, 11 ...... Low temperature side cylinder, 12 ...... Low temperature side heat absorption heat exchanger, 13 ...... Regenerator, 14 ...... Communication chamber, 15 ...... Freezing Machine, 16 …… Indoor heat exchanger, 17 …… Outdoor heat exchanger, 18 …… First switching valve, 19 ……
Second switching valve, 28, 29 ... Circulation pump.

 ───────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takeshi Yokoyama 27, Fukadadai, Yokosuka City, Kanagawa Prefecture (72) Inventor Toshihiro Hoshida 1-3-1 Yadacho, Kita-ku, Nagoya-shi, Aichi Prefecture (72) Inventor Fumio Terada Osaka 2-18-18 Keihanhondori, Moriguchi City, Sanyo Electric Co., Ltd. (72) Inventor Panshin Oshima 2-18-18 Keihanhondori, Moriguchi City, Osaka Prefecture, Osaka (72) Inventor Takashi Nakazato, Osaka 2-18-18 Keihanhondori, Moriguchi City Sanyo Electric Co., Ltd. (72) Inventor Junji Matsue 2-18-18 Keihanhondori, Moriguchi City, Osaka Prefecture Sanyo Electric Co., Ltd. (72) Ryoichi Uenono Moriguchi, Osaka Prefecture 2-18, Keihanhondori, Ichi, Sanyo Electric Co., Ltd. (56) Reference JP-A-61-44254 (JP, A)

Claims (1)

(57) [Claims] 1. A high-temperature-side displacer and a low-temperature-side displacer that reciprocate out of phase, a high-temperature-side cylinder that is divided into a high-temperature chamber and a middle greenhouse by the high-temperature-side displacer, and communicates with this high-temperature chamber. A high temperature side heat exchanger heated from the outside, a heat storage device and a middle temperature side heat exchanger arranged between this heat exchanger and the middle temperature device, and a low temperature side displacer to divide into a low temperature chamber and a middle greenhouse. Low temperature side cylinder,
A low-temperature side heat exchanger and a regenerator, which are arranged between the low-temperature chamber and the middle greenhouse, and a communication chamber that connects the middle-greenhouses to each other, constitute a refrigerator, while radiating heat exchange of the refrigerator. In a cooling and heating device in which a heat exchanger and an endothermic heat exchanger are connected to an indoor heat exchanger and an outdoor heat exchanger by piping, the medium passing through the heat radiating heat exchanger is cooled to the indoor heat exchanger during heating. At the same time as guiding to the outdoor heat exchanger, the first switching valve for guiding the medium that has passed through the heat absorbing heat exchanger to the outdoor heat exchanger during heating and to the indoor heat exchanger during cooling, and indoor heat exchange The medium that has passed through the heat exchanger is guided to the heat radiating heat exchanger during heating and to the heat absorbing heat exchanger during cooling, and the medium that has passed through the outdoor heat exchanger is transferred to the heat absorbing heat exchanger during heating and heat radiating during cooling. A second switching valve for guiding to the exchanger, and the second switching valve from the first switching valve through the indoor heat exchanger. Air and wherein a conduit leading to the valve, in that a respective circulation pump in the conduit and extending from the first switching valve via the outdoor heat exchanger to the second switching valve.