JPH09257326A - Virmier heat pump and its operating method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate bad influence of thermal transfer medium against equipment due to its increased temperature or freezing of the thermal transfer medium and to enable its operation to be smoothly stopped. SOLUTION: Upon acceptance of instruction of stopping operation, a heating device 8 is stopped and at the same time a reciprocating motion of each of displacers 4, 12 is continued under a state in which a first and a second four- way changing-over valves 25, 26 are changed over in such a way that a low temperature side heat exchanger 13, a low temperature side intermediate temperature heat exchanger 15, a high temperature side intermediate temperature heat exchanger 7, a first heat exchanger 19 and a second heat exchanger 20 are connected in series, thereby a temperature adjusting operation for circulating the thermal transfer medium in one circulation passage is performed and the entire system is stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a Wilmie heat pump used for air conditioning such as refrigeration or cooling and heating, and a method of operating the same.

[0002]

2. Description of the Related Art FIG. 4 is a block diagram showing a conventional Vilmier heat pump disclosed in, for example, Japanese Patent Laid-Open No. 61-44254. In the figure, in a high temperature cylinder 1, a high temperature displacer 4 that separates a high temperature space 2 in which a high-pressure working gas such as helium is sealed and a high temperature side intermediate temperature space 3 is provided so as to reciprocate. The high temperature space 2 and the high temperature side intermediate temperature space 3 are connected via a high temperature part heat exchanger 5, a high temperature side regenerator 6 having a heat storage regeneration effect, and a high temperature side middle temperature part heat exchanger 7. The outer wall of the high temperature part heat exchanger 5 is heated by the heating device 8.

In the low temperature cylinder 3, a low temperature displacer 12 for separating a low temperature space 10 and a low temperature side intermediate temperature space 11 is provided so as to be reciprocally movable. The low temperature space 10 and the low temperature side medium temperature space 11 include a low temperature side heat exchanger 13, a low temperature side regenerator 14 having a heat storage regeneration effect, and a low temperature side medium temperature side heat exchanger 1.
It is connected via 5. The high temperature side medium temperature space 3 and the low temperature side medium temperature space 11 are connected by a connecting pipe 16.

The low-temperature pump 17 applies cold heat obtained from the low-temperature heat exchanger 13 to the indoor heat exchanger 19 through the flow path 18.
Alternatively, it is transferred to the outdoor heat exchanger 20. The high temperature pump 21
High temperature side middle temperature part heat exchanger 7 and low temperature side middle temperature part heat exchanger 15
The warm heat obtained from the indoor heat exchanger 1 is passed through the flow path 22.
9 or to the outdoor heat exchanger 20. Indoor fan 23
Supplies the air for transmitting the cold heat or the warm heat conveyed to the indoor heat exchanger 19 to the room. The outdoor fan 24
The air for transmitting the cold heat or the warm heat conveyed to the outdoor heat exchanger 20 to the outside air is supplied.

First and second four-way flow path switching valves 25, 2
Reference numeral 6 circulates the cold heat circulating in the flow path 18 to the indoor heat exchanger 19 and the hot heat circulating in the flow path 22 to the outdoor heat exchanger 20 during the cooling operation, and cools the cold heat circulating in the flow path 18 to the outdoor heat during heating. The heat circulated in the flow path 22 is circulated in the exchanger 20, and is circulated in the indoor heat exchanger 19.

The high temperature displacer 4 and the low temperature displacer 12 are reciprocated by crank mechanisms 27, 28, 29 and a motor (not shown) arranged in the crank space 35. A high temperature displacer seal made of resin or the like is provided on the outer periphery of the high temperature displacer 4 in order to prevent the working gas from directly flowing between the high temperature space 2 and the high temperature side intermediate temperature space 3. Further, the flow of the working gas between the crank space 35 and the high temperature side intermediate temperature space 3 is
It is sealed by a high temperature shaft seal 32 made of resin or the like.

A low temperature displacer seal 33 made of resin or the like is provided on the outer peripheral portion of the low temperature displacer 12 so as to prevent the working gas from directly flowing between the low temperature space 10 and the low temperature side intermediate temperature space 11. There is. The flow of the working gas between the crank space 35 and the low temperature side intermediate temperature space 11 is sealed by a high temperature shaft seal 34 made of resin or the like. In the figure, the arrows along the flow path indicate the flow direction of the heat transport medium during the heating operation.

Next, the operation will be described. First, the generation of cold heat and warm heat is performed by the high temperature pump 21 for the high temperature side intermediate temperature heat exchanger 7 and the low temperature side intermediate temperature heat exchanger 15, and the low temperature pump 17 for the low temperature side heat exchanger 13. , Circulate a heat transport medium such as water. Also,
The heating device 8 heats a part of the high temperature cylinder 1 and the surface of the high temperature part heat exchanger 5, and the motor and crank mechanisms 27 to 29 cause the high temperature displacer 4 and the low temperature displacer 12 to reciprocate.

The high temperature space 2 is heated by the heating device 8.
And the working gas temperature in the high temperature side intermediate temperature space 3 becomes slightly higher than the temperature of the heat transport medium circulated by the high temperature pump 21. As a result, the working gas undergoes a pressure fluctuation that is substantially proportional to the temperature difference between the working gas in the high temperature space 2 and the high temperature side intermediate temperature space 3. And the high temperature side medium temperature space 3
Since the low temperature side medium temperature space 11 is connected to the low temperature side medium temperature space 11, the pressure fluctuation of the generated working gas is directly transmitted to the low temperature cylinder 9 side, and the working gas temperature of the low temperature side medium temperature space 11 is changed by the compression work of the working gas. The temperature of the working gas in the high temperature side medium temperature space 3 is almost the same as that of the low temperature side medium temperature space 11 due to the expansion work of the working gas.

In such a state, the high temperature pump 21
The heat transport medium circulated in is heated to the working gas in the high temperature side intermediate temperature part heat exchanger 7 and the low temperature side intermediate temperature part heat exchanger 15, so that the temperature thereof rises, and thereby the heating heat is obtained. . Further, since the heat transport medium circulated by the low temperature pump 17 is cooled to the working gas by the low temperature heat exchanger 13,
Its temperature decreases, which provides cold heat for cooling.

As described above, the hot heat for heating and the cold heat for cooling are generated by the compression or expansion of the working gas, and the expansion or compression of the working gas is generated in proportion to the heating temperature of the high temperature portion. Therefore, after the start of activation, sufficient warm heat or cold heat can be obtained when the temperature of the high temperature portion is sufficiently increased. In addition, the temperature of the high temperature portion is often heated to about 500 ° C. to 800 ° C., depending on the type of material used for the high temperature portion.

Next, the generated warm heat or cold heat is transferred to the indoor heat exchanger 19 as a heat transport medium for carrying cold heat during the cooling operation.
The heat transport medium that conveys the heat is sent to the outdoor heat exchanger 20, the indoor heat exchanger 19 cools the indoor air supplied from the indoor fan 23 by the cold heat that is transported, and the outdoor heat exchanger 20 transports the indoor air. The warm heat is discharged using the outdoor air supplied from the outdoor fan 24. On the other hand, during the heating operation, the indoor heat exchanger 19 uses a heat transport medium that conveys heat.
To the outdoor heat exchanger 20, the indoor heat exchanger 19 heats the indoor air supplied from the indoor fan 23, and the outdoor heat exchanger 20 transfers the cold air to the outdoor heat exchanger 20. The generated cold heat is heated by the outdoor air supplied from the outdoor fan 24.

As described above, since the generated cold heat and warm heat need to be transferred to different heat exchangers during the cooling operation and the heating operation, respectively, the flow paths 18 and 22 are provided in the middle of the flow paths. There are provided a first four-way switching valve 25 and a second four-way switching valve 26 for switching between. Then, during the heating operation, the first and second four-way switching valves 25, 26
Is switched to the route indicated by the solid line, and is switched to the route indicated by the broken line during the cooling operation.

[0014]

In the conventional Vilmier heat pump configured as described above, since heating and cooling are performed by utilizing the heat and cold generated in proportion to the temperature of the high temperature part, the heat and cold A sufficient rise in the temperature of the hot part is required for sufficient generation. From such characteristics,
At the time of the stop operation for ending the heating and cooling operation, the heating device 8
When the reciprocating motion of the high-temperature displacer 4 and the low-temperature displacer 12 is stopped at the same time by stopping the heating of the high-temperature part by the brake device, the heat accumulated in the high-temperature part according to the heat capacity of the high-temperature cylinder 1 etc. 3 and the intermediate temperature space 11 on the low temperature side to raise these temperatures with time, and adversely affect the seals 31, 32, 33, 34 made of resin material such as deterioration, deformation and the like.

The adverse effect on the seal is that even after the heating by the heating device 8 is stopped, the high temperature displacer 4 and the low temperature displacer 12 continue the reciprocating motion until the temperature of the high temperature portion is sufficiently decreased (for several minutes), and the heat is transferred. It can be easily avoided by radiating heat to the outside through the medium. However, during that time, it is necessary to keep the circulation circuit of the heat transport medium including the heat exchangers 19 and 20 and the fans 23 and 24 to perform the same operation as in the steady operation.

If the operation of the heat transport medium and the heat exchanger is stopped and the displacer continues to operate, hot and cold heat continues to be generated. Therefore, the high temperature side middle temperature part heat exchanger 7 and the low temperature side middle temperature part As the temperature of the heat transport medium near the heat exchanger 15 rises, the temperature of the working gas in the high temperature side medium temperature space 3 and the low temperature side medium temperature space 11 also rises, which eventually adversely affects the seals at various places. Further, in the low temperature part heat exchanger 13, the heat transport medium remaining inside may be frozen, and the next startup cannot be performed smoothly.

As described above, in the conventional Vilmier heat pump, it is necessary to continue operating the indoor heat exchanger for several minutes even after shifting to the stop operation, and therefore, the indoor cooling or heating must be continued for a while. There was a problem that it did not happen.

The present invention has been made to solve the above problems, and a Wilmie heat pump and its operating method capable of smoothly stopping the operation without burdening the equipment. Aim to get.

[0019]

A Vilmier heat pump according to a first aspect of the present invention is provided with a high temperature cylinder containing a working gas and a reciprocating motion in the high temperature cylinder. A high-temperature displacer that is divided into a medium-temperature space on the side, a low-temperature cylinder that contains the working gas, and a low-temperature medium-temperature space that is reciprocally provided in the low-temperature cylinder and that communicates the low-temperature cylinder to the low-temperature space and the high-temperature medium-temperature space Low temperature displacer
A high temperature part heat exchanger and a high temperature side middle temperature part heat exchanger connected between the high temperature space and the high temperature side middle temperature space, and a low temperature part heat exchanger connected between the low temperature space and the low temperature side middle temperature space And a heating device provided in the low temperature side middle temperature part heat exchanger and the high temperature part heat exchanger for heating the working gas in the high temperature space, and obtained from each of the middle temperature part heat exchanger and the low temperature part heat exchanger. A first heat exchanger for exchanging one of the cold heat and a second heat exchanger for exchanging the other of the warm heat obtained from each intermediate temperature heat exchanger and the cold heat obtained from the low temperature heat exchanger. A flow path for circulating a heat transport medium between the heat exchanger, each of the intermediate temperature heat exchanger and the low temperature heat exchanger, and the first and second heat exchangers, and a flow path provided in this flow path, Flow path switching means for switching whether to transfer hot heat or cold heat to the first and second heat exchangers; When the operation stop command is received, the heating device is stopped, and the low temperature heat exchanger, the low temperature middle temperature heat exchanger, the high temperature middle temperature heat exchanger, the first heat exchanger and the second heat exchanger are activated. By continuing the reciprocating motion of each displacer in a state in which the flow path switching means is switched so as to be connected in series, the temperature control operation of circulating the heat transport medium in one circulation path is performed, and then the entire operation is stopped. And a control unit.

In the Vilmier heat pump according to the second aspect of the present invention, a bypass means for bypassing a part of the flow passage to stop the circulation of the heat transport medium to the first heat exchanger during the temperature control operation is provided in the flow passage. It is provided.

In the method of operating the Vilmier heat pump according to the third aspect of the present invention, the heating device is stopped after receiving the operation stop command, and the low temperature part heat exchanger, the low temperature side intermediate temperature part heat exchanger, and the high temperature side intermediate temperature. One circulation path by continuing the reciprocating motion of each displacer while switching the flow path switching means so that the partial heat exchanger, the first heat exchanger, and the second heat exchanger are connected in series. After the temperature control operation of circulating the heat transport medium is carried out, the whole is stopped.

According to a fourth aspect of the present invention, there is provided a method for operating a Vilmier heat pump in which a heat-transporting medium is circulated during a temperature control operation, and the outlet side of the low temperature side middle temperature section heat exchanger or the high temperature side middle temperature section heat exchanger is the first side. It is connected to the inlet side of the second heat exchanger.

In the method of operating the Vilmier heat pump according to the invention of claim 5, the outlet side of the low temperature part heat exchanger is connected to the inlet side of the second heat exchanger in the circulation path of the heat transport medium during the temperature control operation. It is what is done.

According to a sixth aspect of the present invention, there is provided a method for operating a Vilmier heat pump in which the first heat exchanger is an indoor heat exchanger and the second heat exchanger is an outdoor heat exchanger. An indoor fan and an outdoor fan that promote heat exchange are provided near the outdoor heat exchanger, and the operation of the indoor fan is stopped and the operation of the outdoor fan is continued during temperature control operation.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1. 1 is a block diagram showing a Vilmier heat pump according to Embodiment 1 of the present invention. In the figure, in a high temperature cylinder 1, a high temperature displacer 4 that separates a high temperature space 2 in which a high-pressure working gas such as helium is sealed and a high temperature side intermediate temperature space 3 is provided so as to reciprocate. The high temperature space 2 and the high temperature side intermediate temperature space 3 are connected via a high temperature side heat exchanger 5, a high temperature side regenerator 6 and a high temperature side medium temperature part heat exchanger 7. The outer wall of the high temperature part heat exchanger 5 is heated by the heating device 8.

In the low temperature cylinder 3, a low temperature displacer 12 that separates a low temperature space 10 and a low temperature side intermediate temperature space 11 is provided so as to be capable of reciprocating. The low temperature space 10 and the low temperature side medium temperature space 11 are connected via a low temperature side heat exchanger 13, a low temperature side regenerator 14 and a low temperature side medium temperature part heat exchanger 15. The high temperature side medium temperature space 3 and the low temperature side medium temperature space 11 are connected by a connecting pipe 16.

The low-temperature pump 17 applies cold heat obtained from the low-temperature heat exchanger 13 through the flow path 18 to the indoor heat exchanger 19 which is the first heat exchanger or the outdoor heat exchanger which is the second heat exchanger. Transport to 20. The high temperature pump 21 conveys the heat generated from the high temperature side intermediate temperature section heat exchanger 7 and the low temperature side intermediate temperature section heat exchanger 15 to the indoor heat exchanger 19 or the outdoor heat exchanger 20 through the flow path 22. The indoor fan 23 supplies air for transmitting the cold heat or the warm heat conveyed to the indoor heat exchanger 19 to the room. The outdoor fan 24 supplies air for transmitting the cold heat or the warm heat conveyed to the outdoor heat exchanger 20 to the outside air.

The first and second four-way flow path switching valves 25, 26 as flow path switching means circulate the cold heat circulating in the flow path 18 to the indoor heat exchanger 19 and the flow path 22 during the cooling operation. The warm heat is circulated to the outdoor heat exchanger 20, the cold heat circulated in the flow path 18 is circulated to the outdoor heat exchanger 20, and the hot heat circulated in the flow path 22 is circulated to the indoor heat exchanger 19 during heating.

A high-temperature displacer seal made of resin or the like is provided on the outer periphery of the high-temperature displacer 4 in order to prevent the working gas from directly flowing between the high-temperature space 2 and the high-temperature side intermediate-temperature space 3. . Further, on the outer peripheral portion of the low temperature displacer 12, a low temperature displacer seal 33 made of resin or the like is provided to prevent the working gas from directly flowing between the low temperature space 10 and the low temperature side intermediate temperature space 11.
Is provided.

The high temperature displacer 4 and the low temperature displacer 12 are reciprocated by the resonance action of the high temperature spring 36 and the low temperature spring 37, respectively. That is, the drive system of the two displacers 4 and 12 is a so-called free piston system, and the deviation of the reciprocating motion timing and the width of each reciprocating motion can be freely controlled. A drive device 38 is provided on the high temperature displacer 4 side in order to adjust the width and cycle of such reciprocating motion.

The flow of the working gas between the high temperature spring space 39 containing the high temperature spring 36 and the driving device 38 and the high temperature side intermediate temperature space 3 is sealed by a high temperature shaft seal 32 made of resin or the like. The flow of the working gas between the low temperature spring space 40 containing the low temperature spring 37 and the low temperature side intermediate temperature space 11 is sealed by a high temperature shaft seal 34 made of resin or the like. In the figure, the arrow indicates an example of the flow direction of the heat transport medium at the end of the heating operation or the cooling operation.

Next, the operation will be described. In the present embodiment in which the crank mechanism is not used for the reciprocating motion of the displacers 4 and 12, other than the displacer motion method,
The generation of cold heat and warm heat and the method of utilizing those heat are the same as in the conventional example. The operation of the free piston method will be described below.

A high temperature pump 21 is used for the high temperature side middle temperature heat exchanger 7 and the low temperature side medium temperature heat exchanger 15, and a low temperature pump 17 is used for the low temperature side heat exchanger 13 to transfer heat such as water. Circulate the medium. Also, the heating device 8
Part of the high temperature cylinder 1 and the surface of the high temperature part heat exchanger 5 are heated by the high temperature spring 36 by the drive device 38.
When the high temperature displacer 4 on which the resonance motion due to is applied is reciprocated, the temperature of the working gas in the high temperature space 2 rises, and the temperature of the working gas in the high temperature side intermediate temperature space 3 is slightly higher than the temperature of the heat transport medium circulated by the high temperature pump 21. It becomes temperature.

As a result, the working gas undergoes a pressure fluctuation substantially proportional to the temperature difference between the working gas in the high temperature space 2 and the high temperature side intermediate temperature space 3. Since the high temperature side medium temperature space 3 and the low temperature side medium temperature space 11 are connected by the connecting pipe 16, the generated pressure fluctuation of the working gas is directly transmitted to the low temperature cylinder 9 side, and the low temperature space 10 and the low temperature side medium temperature space 11 are transmitted. The pressure difference between the low temperature spring space 40 and the low temperature spring space 40 acts on the low temperature displacer 12, and the low temperature displacer 12 reciprocates by the resonance action of the low temperature spring 37.

The low-temperature displacer 1 thus constructed
Due to the effect of the reciprocating movement of 2 and the pressure fluctuation of the working gas, the working gas temperature of the low temperature side intermediate temperature space 11 rises to the same level as the working gas temperature of the high temperature side intermediate temperature space 3 in the compression work stroke.
Further, the temperature of the working gas in the low temperature working space 10 is lower than that of the low temperature side middle temperature space 11 which is cooled by the expansion work process of the working gas.

In such a state, the high temperature pump 21
The heat transport medium circulated in is heated to the working gas in the high temperature side intermediate temperature part heat exchanger 7 and the low temperature side intermediate temperature part heat exchanger 15, so that the temperature thereof rises, and thereby the heating heat is obtained. . Further, since the heat transport medium circulated by the low temperature pump 17 is cooled to the working gas by the low temperature heat exchanger 13,
Its temperature decreases, which provides cold heat for cooling.

Next, the generated warm heat or cold heat is transferred to the indoor heat exchanger 19 as a heat transport medium for carrying cold heat during the cooling operation.
The heat transport medium that conveys the heat is sent to the outdoor heat exchanger 20, the indoor heat exchanger 19 cools the indoor air supplied from the indoor fan 23 by the cold heat that is transported, and the outdoor heat exchanger 20 transports the indoor air. The warm heat is discharged using the outdoor air supplied from the outdoor fan 24. On the other hand, during the heating operation, the indoor heat exchanger 19 uses a heat transport medium that conveys heat.
To the outdoor heat exchanger 20, the indoor heat exchanger 19 heats the indoor air supplied from the indoor fan 23, and the outdoor heat exchanger 20 transfers the cold air to the outdoor heat exchanger 20. The generated cold heat is heated by the outdoor air supplied from the outdoor fan 24.

As described above, since the generated cold heat and hot heat need to be transferred to different heat exchangers during the cooling operation and the heating operation, respectively, there is a flow path in the middle of each flow path 18, 22. There are provided a first four-way switching valve 25 and a second four-way switching valve 26 for switching between. Then, during the heating operation, the first and second four-way switching valves 25, 26
Is switched to the route indicated by the solid line, and is switched to the route indicated by the broken line during the cooling operation.

Next, when ending the heating or cooling operation,
The controller (not shown) that receives the operation stop command stops the heating device 8 and the indoor fan 23, and
Either one of the four-way switching valve 25 and the second four-way switching valve is switched to form a flow path of the heat transport medium as indicated by an arrow in the figure, for example. That is, as the circulation flow path of the heat transport medium, the high temperature side middle temperature section heat exchanger 7, the low temperature side middle temperature section heat exchanger 15, the low temperature section heat exchanger 13, the indoor heat exchanger 1
9 and the outdoor heat exchanger 20 are connected in series, and the heat transfer medium for warm heat transfer and the heat transfer medium for cold heat transfer, which are circulated in different flow paths during cooling operation or heating operation, are in the same flow path. It will circulate in. In addition, the drive device 38 for the pumps 17, 21, the outdoor fan 24, and the displacers 4, 12
The operation will continue.

As described above, when the indoor fan 23 is stopped in a state in which the circulation flow path of the heat transport medium is one series flow path, heating or cooling of the room by the indoor heat exchanger 19 is almost performed. I don't know. If the reciprocating motion of the high-temperature displacer 4 and the low-temperature displacer 12 is continued until the temperature of the high-temperature (heating) portion is sufficiently reduced thereafter, hot and cold heat will continue to be generated, but the outdoor fan 24 will continue to operate to keep the outdoor heat The heat exchanger 20 adjusts the temperature of the heat transport medium using the outside air, and prevents the temperature rise and freezing of the heat transport medium, which adversely affects the equipment.

The temperature adjustment operation after such an operation stop command may be completely stopped, for example, when the temperature of the high temperature space 2 or the high temperature side middle temperature heat exchanger 7 becomes equal to or lower than a set value.
In some cases, there is also a method of stopping the operation after a set time has elapsed after the operation stop command is issued.

Although it is possible to use a flow path opposite to the arrow in the drawing as the serial flow path as described above, as shown by the arrow in the drawing, the high temperature side intermediate temperature heat exchanger 7 or the low temperature side intermediate temperature is exchanged. By connecting the outlet side of the partial heat exchanger 15 to the inlet side of the outdoor heat exchanger 20, it is possible to convey the circulating heat transport medium to the outdoor heat exchanger 20 at the highest temperature, and to radiate heat to the outside air. Is improved, and the cooling operation of the high temperature (heating) portion can be completed quickly.

Embodiment 2 Next, FIG. 2 is a configuration diagram showing an operating method of the Wilmie heat pump according to the second embodiment of the present invention. Since the configuration of the device and the operation during the cooling / heating operation are the same as those in the first embodiment, only the operation during the operation stop will be described here.

In this example, when the cooling operation or the heating operation is ended, the indoor fan 23 is stopped at the same time as the operation end command to immediately stop the cooling and heating for the room, as in the first embodiment. Either one of the four-way switching valve 25 and the second four-way switching valve 26 is switched to circulate the heat transport medium carrying cold heat and the heat transport medium carrying warm heat in the same flow path. At that time, the heat transport medium is transferred from the high temperature pump 21 to the low temperature side intermediate temperature heat exchanger 15, the high temperature side intermediate temperature heat exchanger 7, the four-way switching valve 25, the indoor heat exchanger 19, the four-way switching valve 26, and the low temperature pump. It circulates in the route returning to the high temperature pump 21 again via 17, the low temperature part heat exchanger 13, the four-way switching valve 25, the outdoor heat exchanger 20, and the four-way switching valve 26.

When the heat transport medium is circulated through such a route, the low temperature side heat exchanger 13 has a low temperature side medium temperature part heat exchanger 15
And the high temperature heat transport medium heated by the high temperature side intermediate temperature heat exchanger 7 is conveyed. Therefore, especially when the outside air is at a low temperature, freezing of the heat transport medium in the low temperature heat exchanger 13 is prevented, and the next startup can be smoothly performed.

Embodiment 3 Next, FIG. 3 is a configuration diagram showing a Vilmier heat pump according to a third embodiment of the present invention. In the figure, the heat transfer medium circulation path is provided with a three-way switching valve 30 as a bypass means for bypassing a part of the heat transfer medium to stop the circulation of the heat transfer medium to the indoor heat exchanger. Further, in the figure, the arrow indicates an example of the flow direction of the heat transport medium at the end of the operation. Other configurations are the same as those in the first embodiment.

Next, the operation will be described. The generation of cold energy and hot energy and the method of using cold energy and hot energy during steady operation are the same as in the first and second embodiments. In this example, when the cooling operation or the heating operation is to be ended, the indoor fan 23 is simultaneously operated at the same time as the operation end command, as in the first and second embodiments.
Is immediately stopped to stop the cooling and heating of the room, and at least one of the first four-way switching valve 25 and the second four-way switching valve 26 is switched to separate the heat transport medium that was transporting the cold heat and the warm heat. The heat transport medium being conveyed is circulated in the same flow path. At that time, the circulation of the heat transport medium is bypassed by the three-way switching valve 30 and the circulation of the heat transport medium to the indoor heat exchanger 19 is stopped, whereby the heating operation or the cooling operation for the room is completely stopped.

Therefore, even during the cooling operation of the high temperature (heating) portion, it is possible to completely stop the cooling and heating of the room,
The effect on the room temperature can be eliminated and more comfortable air conditioning can be provided.

Although the three-way switching valve 30 is used as the bypass means in the above-described third embodiment, another valve structure or a plurality of valve structures may be used as long as flow path switching that bypasses the indoor heat exchanger 19 is possible. A combination of valves may be used.

Further, in each of the embodiments, an example of the cooling and heating air conditioning system has been described, but the Vilmier heat pump of the present invention can be applied to a cooling and refrigerating system and a hot water supply system having similar configurations, and similar effects can be obtained. To be
Furthermore, in each of the above embodiments, the drive device 38 and the spring 3 are used.
Although the displacers 4 and 12 are reciprocally moved by 6 and 37, the crank mechanism as shown in FIG. 4 can be used, and the effect of the temperature control operation can be obtained.

[0051]

As described above, the Vilmier heat pump of the first aspect of the invention does not stop the whole immediately after the operation stop command, but performs the temperature control operation and then stops the whole. As a result, it is possible to prevent the adverse effect on the equipment due to the temperature rise of the heat transport medium and the freezing of the heat transport medium, and to smoothly stop the operation.

In the Vilmier heat pump of the second aspect of the present invention, the flow passage is provided with a bypass means for bypassing a part of the flow passage during the temperature control operation to stop the circulation of the heat transport medium to the first heat exchanger. Therefore, the heat exchange in the first heat exchanger can be stopped immediately after the operation stop command, and the influence of the temperature control operation can be prevented from affecting the first heat exchanger side.

In the method of operating the Vilmier heat pump according to the third aspect of the present invention, the temperature control operation is performed and the whole is stopped immediately after the operation stop command is issued. It is possible to prevent the adverse effect on the equipment due to the temperature rise and the freezing of the heat transport medium, and to smoothly stop the operation.

According to a fourth aspect of the present invention, there is provided a method for operating a Vilmier heat pump in which a heat-transporting medium is circulated during a temperature control operation, and the outlet side of the low-temperature side intermediate-temperature heat exchanger or the high-temperature side intermediate-temperature heat exchanger is set to the first side. Since it is connected to the inlet side of the second heat exchanger, the hottest heat transport medium in the circulation passage is sent to the second heat exchanger in operation, the heat dissipation effect is improved, and the cooling operation of the high temperature part is performed. Can be completed quickly.

According to a fifth aspect of the present invention, there is provided a method for operating a Vilmier heat pump in which a heat transfer medium circulation path is used during temperature control operation, and the outlet of the low temperature heat exchanger is connected to the inlet of the second heat exchanger. Therefore, the hottest heat transport medium in the circulation channel is sent to the low temperature heat exchanger, and especially when the outside air is low, it is possible to effectively prevent freezing of the heat transport medium in the low temperature heat exchanger. Therefore, the next startup can be performed more smoothly.

In the method of operating the Vilmier heat pump according to the sixth aspect of the present invention, the operation of the indoor fan is stopped and the operation of the outdoor fan is continued during the temperature control operation. Therefore, a command to stop the heating operation or the cooling operation for the room is issued. At the same time, it can be stopped and comfortable air conditioning can be provided.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a Vilmier heat pump according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing an operating method of a Vilmier heat pump according to a second embodiment of the present invention.

FIG. 3 is a configuration diagram showing a Vilmier heat pump according to a third embodiment of the present invention.

FIG. 4 is a configuration diagram showing an example of a conventional Vilmier heat pump.

[Explanation of symbols]

1 high temperature cylinder, 2 high temperature space, 3 high temperature side medium temperature space, 4 high temperature displacer, 5 high temperature part heat exchanger, 7
High temperature side medium temperature part heat exchanger, 8 Heating device, 9 Low temperature cylinder, 10 Low temperature space, 11 Low temperature side medium temperature space, 12
Low temperature displacer, 13 Low temperature heat exchanger, 15 Low temperature intermediate temperature heat exchanger, 18, 22 Flow paths, 19 Indoor heat exchanger (first heat exchanger), 20 Outdoor heat exchanger (Second heat exchanger)
Heat exchanger), 23 indoor fans, 24 outdoor fans,
25, 26 four-way switching valve (flow path switching means), 30 three-way switching valve (bypass means).

Claims (6)

[Claims] 1. A high-temperature cylinder for containing a working gas, a high-temperature displacer provided in the high-temperature cylinder so as to be capable of reciprocating motion, and a high-temperature displacer for dividing the inside of the high-temperature cylinder into a high-temperature space and a high-temperature-side intermediate-temperature space, A low-temperature cylinder, a low-temperature displacer provided in the low-temperature cylinder so as to reciprocate, and dividing the low-temperature cylinder into a low-temperature space and a low-temperature intermediate-temperature space communicating with the high-temperature intermediate-temperature space; the high-temperature space and the high-temperature side. A high temperature part heat exchanger and a high temperature side middle temperature part heat exchanger connected between the middle temperature space and a low temperature part heat exchanger and a low temperature side connected between the low temperature space and the low temperature side middle temperature space. A medium temperature part heat exchanger, a heating device provided in the high temperature part heat exchanger for heating the working gas in the high temperature space, and heat and low temperature obtained from each of the middle temperature part heat exchangers. A first heat exchanger for exchanging any one of cold heat obtained from the partial heat exchanger, and either hot heat obtained from each of the intermediate temperature heat exchangers and cold heat obtained from the low temperature heat exchangers A heat transfer medium is circulated between the second heat exchanger that performs heat exchange on the other side, the intermediate temperature heat exchangers and the low temperature heat exchangers, and the first and second heat exchangers. A flow path, flow path switching means provided in the flow path for switching between heating and cooling of the hot heat and the cold heat to the first and second heat exchangers; While the apparatus is stopped, the low temperature part heat exchanger, the low temperature side intermediate temperature part heat exchanger, the high temperature side intermediate temperature part heat exchanger, the first heat exchanger and the second heat exchanger are connected in series. With the flow path switching means switched as described above, By continuing the reciprocating motion of the support, after performing the temperature regulating operation for circulating the heat transfer medium in one circulation passage, Vuilleumier heat pump, characterized in that a control unit that stops the whole. 2. A bypass means for bypassing a part of the flow path to stop the circulation of the heat transport medium to the first heat exchanger during the temperature control operation is provided in the flow path. The Vilmier heat pump according to claim 1. 3. A high-temperature cylinder, a high-temperature displacer provided in the high-temperature cylinder so as to be capable of reciprocating movement, and dividing the high-temperature cylinder into a high-temperature space and a high-temperature side intermediate-temperature space, a low-temperature cylinder, and a reciprocating motion in the low-temperature cylinder A low temperature displacer that is movably provided and divides the inside of the low temperature cylinder into a low temperature space and a low temperature side intermediate temperature space communicating with the high temperature side intermediate temperature space, and is connected between the high temperature space and the high temperature side intermediate temperature space. A high temperature part heat exchanger and a high temperature side intermediate temperature part heat exchanger, a low temperature part heat exchanger and a low temperature side intermediate temperature part heat exchanger connected between the low temperature space and the low temperature side intermediate temperature space, and the high temperature part Any of a heating device provided in a heat exchanger for heating the working gas in the high temperature space, a warm heat obtained from each of the intermediate temperature heat exchangers and a cold heat obtained from the low temperature heat exchangers One of the first heat exchanger for exchanging heat, and the second heat exchange for exchanging the other of the warm heat obtained from each of the intermediate temperature heat exchangers and the cold heat obtained from the low temperature heat exchangers. A flow path for circulating a heat transport medium between the heat exchanger, the medium temperature heat exchangers, the low temperature heat exchangers, and the first and second heat exchangers, A Vilmier heat pump provided with a flow path switching means for switching which of the hot heat and the cold heat to be conveyed to the first and second heat exchangers, the heating device is stopped after receiving an operation stop command. In addition, the low temperature section heat exchanger, the low temperature side intermediate temperature section heat exchanger, the high temperature side intermediate temperature section heat exchanger, the first heat exchanger and the second heat exchanger are connected in series. With the flow path switching means switched, By continuing the reciprocating motion of the tracer, after performing the temperature regulating operation for circulating the heat transfer medium in one circulation path,
A method of operating a Wilmie heat pump, characterized by stopping the whole. 4. The outlet of the low temperature side intermediate temperature heat exchanger or the high temperature side intermediate temperature heat exchanger is connected to the inlet side of the second heat exchanger in the heat transfer medium circulation path during the temperature control operation. The method for operating the Vilmier heat pump according to claim 3, wherein 5. The ville according to claim 3, wherein an outlet side of the low temperature heat exchanger is connected to an inlet side of the second heat exchanger in the circulation path of the heat transport medium during the temperature control operation. How to operate the Mie heat pump. 6. The first heat exchanger is an indoor heat exchanger, the second heat exchanger is an outdoor heat exchanger, and heat exchange is promoted in the vicinity of the indoor heat exchanger and the outdoor heat exchanger. An indoor fan and an outdoor fan are provided respectively, and the operation of the indoor fan is stopped and the operation of the outdoor fan is continued during temperature control operation.
A method for operating the Vilmier heat pump according to claim 5.