JPH02150684A - Cold and hot storage device - Google Patents

Abstract

PURPOSE:To keep two heat insulating rooms at different temperature bands by one refrigerating cycle and permit the switching of a temperature in the heat insulating room into different temperature bands by switching a first, a second and a third refrigerant routes. CONSTITUTION:Solenoid valves 301-305 are opened and closed selectively to switch a first refrigerant route 210, a second refrigerant route 220 and a third refrigerant route 230. A refrigerating chamber 11 can be utilized as a refrigerating chamber and a cold storage and heating chamber 12 can be utilized as a cold storage chamber and a heating chamber. Accordingly, the refrigerating chamber 11 and the cold storage and heating chamber 12 can be kept in different temperature bands (refrigerating temperature, cold storage temperature or heating temperature) by one refrigerating cycle 20 while a temperature in the cold storage and heating chamber 12 can be switched into different temperature bands. Accordingly, when warm foods, obtained through heating cooking now, are stored by mistake into the cold storage and heating chamber 12, functioning as a cold storage chamber, for example, the cold storage and heating chamber 12 may be functioned as a heating chamber by switching the second refrigerant route 220 into the third refrigerant route 230 whereby shifting of the warm foods into a different heating chamber may become unnecessary.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a refrigerating and heating device that can maintain two insulating chambers in different temperature zones in one refrigeration cycle, and in particular, the present invention relates to a cold storage device that can maintain two insulating chambers at different temperature zones in one refrigeration cycle. It is related to the refrigeration and heating equipment installed in the separated two-compartment freezer car.

[Prior Art] A method of keeping two interior rooms in different temperature ranges in one refrigeration cycle is to arrange two refrigerant evaporators in parallel in one refrigeration cycle, and to arrange a cooling refrigerant evaporator inside the vehicle interior. A cooling and freezing system for a vehicle that can cool and freeze the conductor and the freezer compartment, respectively, by disposing a freezing refrigerant evaporator in the freezer compartment and switching the supply of refrigerant to the two refrigerant evaporators using a switching valve. JP-A No. 60-226670)
exists.

Alternatively, two refrigerant condensers are placed in parallel in one refrigeration cycle, one of which is placed in the heating chamber, a refrigerant evaporator is placed in the freezing chamber, and the refrigerant condensers are connected to the two refrigerant condensers. A vehicle freezing and heating device capable of heating and freezing a heating chamber and a freezing chamber, respectively, by switching the supply of refrigerant using a switching valve (Japanese Patent Laid-Open No. 62-46179)
exists.

[Problems to be Solved by the Invention] However, in the conventional vehicle cooling/refrigerating system and freezing/warming system having the above configuration, the two indoor temperature controls are limited to freezing, cooling, or heating. The problem is that cargo is limited in the freezing room or heating room.

For this reason, with the above-mentioned conventional equipment, for example, if warm food that has recently been heated and cooked is put into the freezer compartment, it may be necessary to transfer it to the heating compartment, or if frozen food is accidentally placed in the heating compartment. There was a problem in that if the product was loaded into a freezer, it would be necessary to transfer it to the freezer.

An object of the present invention is to provide a refrigerator/hot storage device that can maintain two heat insulating chambers in different temperature zones in one refrigeration cycle and can switch the temperature in one heat insulating chamber to different temperature zones.

[Means for Solving the Problems] The refrigerator/heat storage device of the present invention includes a first heat insulating chamber insulated from the outside, a second heat insulating room insulated from the outside, and air and refrigerant in the first heat insulating room. a first indoor heat exchanger that exchanges heat, a second indoor heat exchanger that exchanges heat between the air in the second insulation chamber and the refrigerant, and a refrigerant compressor that sucks in, compresses, and discharges the refrigerant;
a refrigerant condenser that condenses a refrigerant; a refrigerant evaporator that evaporates the refrigerant; and a refrigerant discharged from the refrigerant compressor that supplies the refrigerant to the refrigerant condenser and then to the first indoor heat exchanger. a first refrigerant path to be sucked into the refrigerant compressor;
a second refrigerant path for supplying the refrigerant discharged from the refrigerant compressor to the refrigerant condenser, and then supplying the refrigerant to the second indoor heat exchanger and causing the refrigerant to be sucked into the refrigerant compressor; a third refrigerant path for supplying the discharged refrigerant to the second indoor heat exchanger, and then to the refrigerant evaporator and sucking it into the refrigerant compressor; the first refrigerant path and the second refrigerant path; A configuration including a switching means for switching between the refrigerant path and the third refrigerant path is adopted.

Effects] The refrigerating and heating apparatus of the present invention has the following effects due to the above configuration.

By switching the switching means, it is possible to switch between the first refrigerant path, the second refrigerant path, and the third refrigerant path.

When the switching means switches to the first refrigerant path, the refrigerant discharged from the refrigerant compressor is condensed in the refrigerant condenser, and then heat exchanged with the air in the first insulation chamber in the first indoor heat exchanger. Let it evaporate. At this time, the air in the first heat insulation chamber is cooled by the first indoor heat exchanger.
The inside of the insulated room will be refrigerated or frozen.

Furthermore, when the switching means switches to the second refrigerant path, the refrigerant discharged from the refrigerant compressor is condensed in the refrigerant condenser, and then heat exchanged with the air in the second insulation chamber in the second indoor heat exchanger. Let it evaporate.

At this time, the air inside the second heat insulation chamber is cooled by the second indoor heat exchanger, so that the inside of the second heat insulation chamber is refrigerated or frozen.

Further, when the switching means switches to the third refrigerant path, the refrigerant discharged from the refrigerant compressor is condensed by exchanging heat with the air in the second heat insulation chamber in the second indoor heat exchanger, and then the refrigerant is Evaporate in an evaporator. At this time, the second
Since the indoor heat exchanger warms the air within the second heat insulating chamber with the refrigerant, the inside of the second heat insulating chamber is heated.

[Effect of the invention] The refrigerating and heating device of the present invention has the above configuration and operation. It has a secondary effect.

One refrigeration cycle can maintain two insulation chambers at different temperature zones, and can also switch one insulation chamber to different temperature zones. Therefore, the temperature control in the two heat insulating chambers can be variously switched, such as freezing, refrigeration, or heating, and the cargo is not limited at least in the second heat insulating chamber.

[Embodiment] An embodiment of the refrigerating and heating apparatus of the present invention will be explained based on FIGS. 1 to 3.

FIG. 1 shows a refrigeration cycle of a refrigerator/heat storage device to which an embodiment of the present invention is applied, and FIG. 2 shows a two-compartment freezer/refrigerator/heater vehicle equipped with the refrigerator/heat storage device.

1 shows a two-compartment freezing/refrigerating/heating vehicle equipped with a refrigeration/heating storage device 2. The two-compartment freezing/refrigerating/heating vehicle 1 is separately provided with a freezing compartment 11 which is a first insulating room insulated from the outside, and a refrigerating/warming room 12 which is a second insulating room insulated from the outside. There is.

The cold storage device 2 includes the above-mentioned freezing chamber 11 and refrigerator heating chamber 12, a freezing cycle 20, a first refrigerant path 210, and a second refrigerant path 210.
refrigerant path 220, a third refrigerant path 230, and switching means 300.

The refrigeration cycle 20 includes a refrigerant compressor 3, a first indoor heat exchanger 4, a second indoor heat exchanger 5, a refrigerant condenser 6, and a refrigerant evaporator 7.
, receiver 81, first expansion valve 82, second expansion valve 83
, the third expansion valve 84 and the refrigerant pipe 9 connecting these
It is equipped with

The refrigerant compressor 3 is connected to the engine 3 via an electromagnetic clutch 31.
2, compresses the refrigerant and discharges high-temperature, high-pressure gas-phase refrigerant. 33 indicates a radiator of the engine 32; 34
indicates the hot water route.

When the first indoor heat exchanger 4 freezes the inside of the freezer compartment 11,
It functions as a freezing refrigerant evaporator that evaporates the low-temperature, low-pressure atomized refrigerant from the first expansion valve 82 by exchanging heat with the air in the freezer compartment 11 blown by the fan 42 driven by the electric motor 41.

The second indoor heat exchanger 5 is configured to spray a low-temperature, low-pressure atomized refrigerant from a second expansion valve 83 into the refrigerating/warming room 12 by a fan 52 driven by an electric motor 51 when refrigerating the inside of the refrigerating/warming room 12 . It works as a refrigerant evaporator for refrigeration, exchanging heat with the air inside and evaporating it. Further, when heating the inside of the refrigerated heating room 12, the second indoor heat exchanger 5 exchanges heat with the high temperature and high pressure gas phase refrigerant from the refrigerant compressor 3 with the air inside the refrigerated heating room 12; It works as a heating refrigerant condenser.

The refrigerant condenser 6 blows high-temperature, high-pressure gas-phase refrigerant from the refrigerant compressor 3 using a fan 62 driven by an electric motor 61 when freezing the inside of the freezer compartment 11 or refrigerating the inside of the refrigerating/warming room 12. It works as a refrigerant condenser for freezing and refrigeration by exchanging heat with outside air and condensing it.

The refrigerant evaporator 7 supplies the low-temperature, low-pressure atomized refrigerant from the third expansion valve 84 to the engine 3 when heating the inside of the refrigerated heating room 12 .
It functions as a heating refrigerant evaporator that exchanges heat with the engine cooling water from Step 2 and evaporates it.

The receiver 81 temporarily stores the refrigerant liquefied in the refrigerant condenser 6 so that it can be supplied to the first indoor heat exchanger 4 or the second indoor heat exchanger 5 depending on the refrigeration load or the refrigeration load. .

The first expansion valve 82 expands the liquid phase refrigerant flowing into the first indoor heat exchanger 4 from the receiver 81 when the first indoor heat exchanger 4 works as a refrigerant evaporator for freezing.

The second expansion valve 83 expands the liquid phase refrigerant flowing into the second indoor heat exchanger 5 from the receiver 81 when the second indoor heat exchanger 5 works as a refrigerant evaporator for refrigeration. Since the second expansion valve 83 is configured to have a lower refrigerant pressure reducing capacity than the first expansion valve 82, the pressure of the refrigerant flowing into the second indoor heat exchanger 5 is lower than that of the first indoor heat exchanger. The pressure becomes higher than the pressure of the refrigerant flowing into the vessel 4.

The third lijy & valve 84 expands the liquid phase refrigerant from the second indoor heat exchanger 5 into a low temperature, low pressure mist refrigerant when the refrigerant evaporator 7 works as a heating refrigerant evaporator.

The refrigerant pipe 9 transports the refrigerant from the refrigerant compressor 3 to the refrigerant condenser 6 to the receiver 81 to the first expansion valve 82 to the first indoor heat exchanger 4.
These appliances are connected so that the refrigerant pressures all 3 are circulated in this order. Furthermore, bypass pipes 91, 92, and 93 are attached to this refrigerant pipe 9.

The bypass pipe 91 is a pipe that branches from the refrigerant pipe 9 downstream of the receiver 81, bypasses the first expansion valve 82 and the first indoor heat exchanger 4, and joins the refrigerant pipe 9 upstream of the refrigerant compressor 3. be. This bypass pipe 91 connects the second expansion valve 83 and the second indoor heat exchanger 5 to the refrigerant pipe 9 .

The bypass pipe 92 branches from the refrigerant pipe 9 downstream of the refrigerant compressor 3, bypasses the refrigerant condenser 6, receiver 81, and second expansion valve 83, and connects to the bypass pipe 91 upstream of the second indoor heat exchanger 5. This is the pipe that joins the

This bypass piping 92 allows the refrigerant discharged from the refrigerant compressor 3 to be directly supplied to the second indoor heat exchanger 5 which functions as a refrigerant compressor.

Bypass piping 93 is piping that connects refrigerant evaporator 7, which functions as a heating refrigerant evaporator, to bypass piping 92. This bypass piping 93 allows the refrigerant flowing out from the second indoor heat exchanger 5 to be sucked into the refrigerant compressor 3 after first being supplied to the refrigerant evaporator 7 without being sucked into the refrigerant compressor 3 directly. .

1st. A refrigerant path 210 (solid line arrow in the figure) connects the refrigerant discharged from the refrigerant compressor 3 to the refrigerant condenser 6-) to the receiver 8.
This is a circulation path in which the refrigerant is supplied in the order of 1→first expansion valve 82→first indoor heat exchanger 4 and sucked into the refrigerant compressor 3.

A second refrigerant path 220 (indicated by a broken line arrow in the figure) transports the refrigerant discharged from the refrigerant compressor 3 from the refrigerant condenser 6 to the receiver 81.
-) A circulation path that supplies the second expansion valve 83 - 1 to the second indoor heat exchanger 5 in this order and causes the refrigerant compressor 3 to suck it.

The third refrigerant path 230 (illustrated with a dotted chain arrow) supplies the refrigerant discharged from the refrigerant compressor 3 in the order of second indoor heat exchanger 5 -> third expansion valve 84 -> refrigerant evaporator 7. This is a circulation path through which the refrigerant is sucked into the refrigerant compressor 3.

The switching means 300 includes a plurality of electromagnetic switching valves (hereinafter referred to as electromagnetic valves) 301, 302, 303, 304, 305, and check valves 306, 307. and the second refrigerant path 220 and the third
The refrigerant path 230 is selectively switched.

The solenoid valve 301 is provided between the branch point of the bypass pipe 91 of the refrigerant pipe 9 and the first expansion valve 82 .

When the solenoid valve 301 is opened, refrigerant is supplied to the first expansion valve 82 and the first indoor heat exchanger 4. When the solenoid valve 301 is closed, the supply of refrigerant to the first expansion valve 82 and the first indoor heat exchanger 4 is blocked.

The electromagnetic valve 302 is provided between the branch point of the bypass pipe 91 and the second expansion valve 83. When the solenoid valve 302 is opened, refrigerant is supplied to the second expansion valve 83 and the second indoor heat exchanger 5. When the solenoid valve 302 is closed, the supply of refrigerant to the second expansion valve 83 and the second indoor heat exchanger 5 is blocked.

The solenoid valve 303 is provided between the branch point and the confluence point of the bypass pipe 93 of the refrigerant pipe 9 . The solenoid valve 305 is
It is provided between the junction of the bypass piping 91 and the bypass piping 93 and the junction of the bypass piping 91 and the refrigerant piping 9. Solenoid valve 303
．． When the valve 305 is opened, the refrigerant flowing out from the second indoor heat exchanger 5 is sucked into the refrigerant compressor 3. When the solenoid valve 303 is closed and the solenoid valve 305 is opened, the refrigerant flowing out from the second indoor heat exchanger 5 is first supplied to the refrigerant evaporator 7 and then sucked into the refrigerant compressor 3. The solenoid valve 305 is the first
When the refrigerant is supplied into the indoor heat exchanger 4 and the second indoor heat exchanger 5 (simultaneous freezing/refrigerating operation or simultaneous freezing/heating operation), opening and closing of the valves are intermittently repeated.

In this embodiment, the solenoid valve 94 is set to repeatedly open for 5 seconds and close for 10 seconds.

The solenoid valve 304 is provided in the bypass piping 92.

When the solenoid valve 304 is opened, the refrigerant discharged from the refrigerant compressor 3 flows into the bypass pipe 92 and is supplied to the second indoor heat exchanger 5. When the solenoid valve 304 is closed, the refrigerant discharged from the refrigerant compressor 3 is prevented from flowing into the bypass pipe 92 .

The check valve 306 prevents the refrigerant from flowing back into the first indoor heat exchanger 4 through the bypass pipe 91 . The check valve 307 is the first
This prevents the refrigerant from flowing backward from the indoor heat exchanger 4 to the bypass pipe 91.

Therefore, in the case of the refrigeration cycle 20 of this embodiment,
When the solenoid valve 301 is open, the first refrigerant path 21
Switched to 0. In addition, solenoid valves 302, 303.30
5 is opened and the solenoid valve 304 is closed, the refrigerant path is switched to the second refrigerant path 220. Furthermore, the solenoid valve 304
．． 305 is open and the solenoid valves 302 and 303 are closed, the refrigerant path is switched to the third refrigerant path 230.

FIG. 3 shows the electric circuit of the refrigerator/heat storage device 2. As shown in FIG.

A control circuit 400, a refrigeration switch 402, a refrigeration/warming changeover switch 403, and normally open relays 411 to 415 are connected to a battery 401 mounted on the two-compartment refrigeration/warming vehicle 1.

When the refrigeration switch 402 is closed, it energizes the electromagnetic coil 311 of the electromagnetic valve 301 and sends a signal to the control circuit 400 to cause the freezer compartment 11 to perform a freezing operation.

When set to the refrigeration operation side, the refrigeration/warming changeover switch 403 energizes the electromagnetic coil 312 of the solenoid valve 302 and sends a signal to the control circuit 400 to cause the refrigeration/heating room 12 to operate in the refrigeration mode. Furthermore, when the refrigerating heating changeover switch 403 is set to the heating operation side, it energizes the electromagnetic coil 314 of the solenoid valve 304 and the normally closed relay 416, and also operates the refrigerating heating room 12 toward the control circuit 400 to perform the heating operation. send a signal to do so.

Each motor 41, 51, 61, the electromagnetic coil 315 of the electromagnetic valve 305, the electromagnetic clutch 31 of the refrigerant compressor 3, and the electromagnetic coil 313 of the electromagnetic valve 303 are connected to the normally open relays 411 to 415 and the normally open relay 416. There is.

The normally open relay 411 is connected to the fan 4 of the first indoor heat exchanger 4.
The normally open relay 412 is connected to the electric motor 51 of the fan 52 of the second indoor heat exchanger 5, and the normally open relay 413 is connected to the electric motor 51 of the fan 62 of the refrigerant condenser 6. A motor 61 is connected.

The normally open relay 414 is connected to the electromagnetic coil 31 of the electromagnetic valve 305.
5 is connected to the normally open relay 415, and the electromagnetic clutch 3 is connected to the normally open relay 415.
1 is connected to the normally closed relay 416, and the electromagnetic coil 313 of the electromagnetic valve 303 is connected to the normally closed relay 416.

The control circuit 400 turns on and off the electromagnetic coil 315 of the electromagnetic valve 305 during simultaneous freezing/refrigeration operation and simultaneous freezing/heating operation.
It has a built-in timer circuit that sets the FF time, and each normally open relay 411 to 415 is turned ON or
Turn OFF.

Freezing operation, refrigeration operation, or heating operation of the cold storage device 1 of this embodiment will be explained based on the drawings.

When the refrigeration switch 402 is opened or closed or the refrigerating/warming changeover switch 403 is switched, each electromagnetic coil 311 to 315, each relay 411 to 416, each electromagnetic clutch 31, and each motor 41, 51, and 61 are turned to O.
N, OFF, and freezing operation, refrigeration operation, or heating operation is performed. Table 1 shows each operating state.

Margin table below 1 In Table 1, ■ indicates independent freezing operation, ■ indicates independent cooling operation, ■ indicates simultaneous freezing/refrigeration operation, ■ indicates independent heating operation, and ■ indicates simultaneous freezing/heating operation. show. Further, in the refrigeration switch 402, refrigeration indicates a state where it is turned on, and OFF indicates a state where it is turned off. moreover,
In the refrigeration/warming changeover switch 403, refrigeration indicates a state set to the refrigeration operation side, heating indicates a state set to the heating operation side, and OFF indicates a state set to the turned-on side.

17.- And, ◯ indicates a valve open state or operating state, × indicates a valve closed state or stopped state, and * indicates intermittent operation between valve opening and closing.

(2) When the refrigeration switch 402 is turned ON and the refrigeration heating changeover switch 403 is turned on during refrigeration independent operation, as shown in Table 1, the solenoid valve 30
The refrigeration cycle 20 is switched to the first refrigerant path 210 by opening the solenoid valves 1, 303, and 305 and closing the solenoid valves 302, 304. Furthermore, the electromagnetic clutch 31
is turned on, the electric motor 41.61 is turned on, and the electric motor 51 is turned on, thereby driving the refrigerant compressor 3 and the fan 42.62.

Since the solenoid valve 304 is closed, the high-temperature, high-pressure refrigerant discharged from the refrigerant compressor 3 does not flow into the bypass pipe 92 but flows into the refrigerant condenser 6. The refrigerant flowing into the refrigerant condenser 6 is passed through a fan 62 driven by an electric motor 61.
It condenses and liquefies by exchanging heat with the low-temperature outside air that is blown by the air.

This liquefied refrigerant flows into the receiver 81 and is temporarily stored.

Since the solenoid valve 302 is closed and the solenoid valve 301 is open, only the liquid phase refrigerant does not flow into the bypass pipe 91, but is adiabatically expanded by the first expansion valve 82 and becomes a low-temperature, low-pressure mist. It becomes a refrigerant.

This mist refrigerant flows into the first indoor heat exchanger 4, which functions as a refrigerant evaporator for freezing, and is evaporated. At this time, electric motor 4
Since heat is removed from the surrounding air blown by the fan 42 driven by the freezing chamber 11, the inside of the freezer compartment 11 is cooled to an extremely low temperature.

Then, the evaporated refrigerant passes through the check valve 306, is prevented from flowing back to the second indoor heat exchanger 5 by the check valve 307, and is sucked into the refrigerant compressor 3 by the suction force of the refrigerant compressor 3. Ru.

By performing this independent freezing operation, the inside of the freezing chamber 11 is cooled to an extremely low temperature and controlled to a predetermined freezing temperature.

(2) When the refrigeration switch 402 is turned on and the refrigeration heating changeover switch 403 is set to the refrigeration operation side, the solenoid valves 302, 303, and 305 open as shown in Table 1. 30
1.304 closes, the refrigeration cycle 20
is switched to the second refrigerant path 220.

Further, the electromagnetic clutch 31 is turned on, and the electric motor 51
．． 61 is turned on and the electric motor 41 is turned on, thereby driving the refrigerant compressor 3 and the fans 52 and 62.

Since the solenoid valve 304 is closed, the high-temperature, high-pressure refrigerant discharged from the refrigerant compressor 3 does not flow into the bypass pipe 92 but flows into the refrigerant condenser 6. The refrigerant flowing into the refrigerant condenser 6 is passed through a fan 62 driven by an electric motor 61.
Excessive heat exchange with the low-temperature outside air blown by the air causes condensation and liquefaction.

This liquefied refrigerant flows into the receiver 81 and is temporarily stored.

Since the solenoid valve 301 is closed and the solenoid valve 302 is open, only the liquid phase refrigerant does not flow into the first expansion valve 82, but flows into the bypass pipe 91, and flows into the second expansion valve. 83, the refrigerant expands adiabatically and becomes a low-temperature, low-pressure atomized refrigerant.

This mist refrigerant flows into the second indoor heat exchanger 5, which functions as a refrigerant evaporator for refrigeration, and evaporates. At this time, the electric motor 5
Since heat is removed from the surrounding air blown by the fan 52 driven by the refrigerating/heating room 12, the inside of the refrigerating/heating room 12 is cooled to a low temperature.

Then, the evaporated refrigerant passes through the check valve 307, is prevented from flowing back to the first indoor heat exchanger 4 by the check valve 306, and is sucked into the refrigerant compressor 3 by the suction force of the refrigerant compressor 3. Ru.

By performing this refrigeration independent operation, the refrigeration heating room 12
The inside is cooled to a low temperature and controlled to a predetermined refrigeration temperature.

(2) During simultaneous freezing and refrigeration operation When the freezing switch 402 is turned on and the refrigeration/warming changeover switch 403 is set to the refrigeration operation side, the solenoid valves 301, 302, and 303 open as shown in Table 1. valve 30
4 closes, and the solenoid valve 305 repeats opening for 5 seconds and closing for 10 seconds, thereby switching the refrigeration cycle 20 to the first refrigerant path 210 and the second refrigerant path 220. Further, the electromagnetic clutch 31 is turned on and the electric motor 41.51.61 is turned on, thereby driving the refrigerant compression 8!3 and the fan 42.52.62.

Since the solenoid valve 304 is closed, the high-temperature, high-pressure refrigerant discharged from the refrigerant compressor 3 does not flow into the bypass pipe 92 but flows into the refrigerant condenser 6. The refrigerant flowing into the refrigerant condenser 6 is passed through a fan 62 driven by an electric motor 61.
It condenses and liquefies by exchanging heat with the low-temperature outside air blown onto it.

This liquefied refrigerant flows into the receiver 81 and is temporarily stored.

Then, since the solenoid valve 301 is closed and the solenoid valve 302 is open, only the liquid phase refrigerant flows through the first 115j expansion valve 82.
The refrigerant then flows into the second expansion valve 83 and is adiabatically expanded by the first expansion valve 82 and the second I)fi5 expansion valve 83 to become a low-temperature, low-pressure atomized refrigerant.

Here, the liquid phase refrigerant is discharged when the solenoid valve 305 is opened for 5 seconds and then
Since the valve is repeatedly closed for 0 seconds, it will intermittently flow into the second expansion valve 83. This is the first expansion valve 8
Since the second expansion valve 83 is more constricted than the second expansion valve 2, the pressure of the refrigerant in the bypass pipe 92 is higher than that of the first expansion valve 83.
This is a lattice that prevents refrigerant from flowing into the expansion valve 82.

The following actions are similar to I and ■. However, check valve 30
6 serves to prevent the refrigerant flowing out from the second indoor heat exchanger 5 from flowing back into the first indoor heat exchanger 4. By repeating this simultaneous freezing and refrigeration operation, the inside of the freezing compartment 11 is cooled to an extremely low temperature, the inside of the refrigeration/warming room 12 is cooled to a low temperature, and the temperature is controlled to predetermined freezing and refrigeration temperatures, respectively.

■When the freezing switch 402 is turned on during heating operation alone and the refrigerating/warming changeover switch 403 is set to the heating operation side, the solenoid valves 304 and 305 open and the solenoid valves 304 and 305 open as shown in Table 1. Valve 301.30
2. By closing the valve 303, the refrigeration cycle 20
is switched to the third refrigerant path 230.

Further, the electromagnetic clutch 31 is turned on, and the electric motor 51
By turning on the refrigerant compressor 11!3 and the fan 52 are driven.

Since the solenoid valves 301 and 302 are closed and the solenoid valve 304 is open, all of the high temperature and high pressure gas phase refrigerant discharged from the refrigerant compressor 3 does not flow into the refrigerant condenser 6 and flows into the bypass pipe 92. flows into.

The gas phase refrigerant is then transferred to a second refrigerant condenser that serves as a heating refrigerant condenser.
It flows directly into the indoor heat exchanger 5, where it is condensed and liquefied. At this time, the heat retained in the engine cooling water is imparted to the surrounding air blown by the fan 52 driven by the electric motor 51, so that the inside of the refrigerating/heating room 12 is heated.

Then, since the solenoid valve 303 is closed, the liquefied refrigerant flows into the bypass pipe 93, and is expanded by the third expansion valve 84 to become a low-temperature, low-pressure atomized refrigerant.

This mist refrigerant flows into the refrigerant evaporator 7 for heating and evaporates. At this time, retained heat is taken away from the engine cooling water that retains the engine exhaust heat of the engine 32. Then, the evaporated refrigerant passes through the electromagnetic valve 305 and the check valve 307, is prevented from flowing back to the first indoor heat exchanger 4 by the check valve 306, and is compressed by the suction force of the refrigerant compressor 3. 3
is inhaled.

By repeating this single heating operation, the inside of the cold cutting/splitting greenhouse 12 is heated and controlled to a predetermined heating temperature.

(2) During simultaneous freezing and heating operation When the freezing switch 402 is turned on and the refrigerating and heating changeover switch 403 is set to the heating operation side, the solenoid valves 301 and 304 open and the solenoid valves 301 and 304 open as shown in Table 1. Valve 302.30
3 closes, and the solenoid valve 305 repeats opening for 5 seconds and closing for 10 seconds, thereby switching the refrigeration cycle 20 to the first refrigerant path 210 and the third refrigerant path 230. Further, the electromagnetic clutch 31 is turned on and the electric motor 41.51.61 is turned on, thereby driving the refrigerant compressor 3 and the fan 42.52.62.

A portion of the high-temperature, high-pressure gas phase refrigerant discharged from the refrigerant compressor 3 flows into the refrigerant condenser 6, where it performs the same operations as described below.

The remaining refrigerant from the refrigerant compressor 3 intermittently flows into the bypass pipe 92 as the solenoid valve 304 opens and the solenoid valve 305 repeats opening for 5 seconds and closing for 10 seconds.

The remaining gaseous refrigerant then directly flows into the second indoor heat exchanger 5, which functions as a heating refrigerant condenser. It has the same effect as ■ below.

By performing this simultaneous freezing and heating operation, the freezing compartment 11
The inside is cooled to an extremely low temperature, the inside of the refrigerated heating room 12 is heated,
Each is controlled to a predetermined freezing temperature and heating temperature.

As described above, in this embodiment, the first refrigerant path 210, the second refrigerant path 220, and the third refrigerant path 230 can be switched by selectively opening and closing the solenoid valves 301 to 305. Therefore, the freezing room 11 can be used as a freezing room, and the refrigerating and heating room 12 can be used as a refrigerating room and a heating room. Therefore, one refrigeration cycle 2
0, it is possible to maintain the inside of the freezer compartment 11 and the refrigerated heating room 12 at different temperature zones (freezing temperature and refrigeration temperature or heating temperature), and it is also possible to switch the inside of the refrigerated heating room 2 to different temperature zones.

Therefore, for example, even if hot food that has recently been heated and cooked is accidentally put into the refrigerated heating room 12 functioning as a refrigerator, the solenoid valves 304 and 305 will be opened and the solenoid valves 302 and 303 will be closed. By switching from the second refrigerant path 220 to the third refrigerant path 230, the refrigerated heating room 12 functions as a heating room, thereby eliminating the need to take the trouble to transfer warm foods to a separate heating room. .

Alternatively, even if refrigerated food is accidentally put into the refrigerated heating chamber 12 functioning as a heating chamber, the solenoid valve 302.30
3. By opening the valve 305 and closing the solenoid valve 304 to switch from the third refrigerant path 230 to the second refrigerant path 220, the refrigerating and warming room 12 functions as a refrigerating room. There is no need to take the trouble to transfer food to a separate refrigerator.

Therefore, the inside of the refrigerating and heating room 12 can be switched between the refrigerating temperature and the heating temperature, and the cargo is not limited, thereby providing a two-compartment refrigerating and heating vehicle equipped with the highly versatile refrigerating and heating device 2. can be provided.

[Other Examples] In this example, the refrigerating/heating storage device of the present invention is mounted on a two-compartment type freezer/refrigerating/heating vehicle, but it may also be applied to a stationary type freezer or refrigerating/heating cabinet.

In this example, the first insulation chamber was used as a freezing chamber, but
By providing a bypass pipe that allows the refrigerant to flow directly into the first indoor heat exchanger 4 from the refrigerant compressor 3 and a bypass pipe that flows into the refrigerant evaporator 7, the first insulation room can be converted into a freezing (or refrigerating) heating room. It may also be used as Moreover, you may use a 2nd heat insulation room as a freezing heating room.

In this example, heat was exchanged between the engine cooling water and the refrigerant using the refrigerant evaporator, but it is also possible to exchange heat between the engine exhaust and the refrigerant using the refrigerant evaporator, or by attaching a fan to the refrigerant evaporator to force outside air Heat exchange may be performed between the refrigerant and the refrigerant.

All solenoid valves can be replaced with remote-controlled manual on-off valves. All electric motors and fans can be replaced with fans driven by the engine mounted on the two-compartment freezer/refrigerator/heater vehicle via belts. Additionally, the check valve 307 can be eliminated. Furthermore, the intermittent time of the solenoid valve 305 can be freely changed as long as freezing can be performed in the freezer compartment.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing the refrigeration cycle of the refrigeration/heating storage device adopted in the refrigeration/heating storage device of the present invention, and Fig. 2 is a perspective view showing a two-compartment freezer/refrigeration heating car adopted in the refrigeration/heating storage device of the present invention. 3 are electrical circuit diagrams of the cold storage device employed in the cold storage device of the present invention. In the diagram: 1... Two-compartment freezer/refrigerator/heating car 2... Cold/heat storage device 3
...Refrigerant compressor 4...First indoor heat exchanger 5...
・Second indoor heat exchanger 6... Refrigerant condenser 7... Refrigerant evaporator 11... Freezer room (first insulation room) 12...
Refrigerated heating room (second insulation room) 20...Freezing cycle 2
10... First refrigerant path 220... Second refrigerant path 230... Third refrigerant path 300... Switching means

Claims (1)

[Claims] 1) (a) a first heat insulating chamber insulated from the outside; (b) a second heat insulating room insulated from the outside; and (c) air and refrigerant in the first heat insulating chamber. a first indoor heat exchanger that exchanges heat; (d) a second indoor heat exchanger that exchanges heat between the air in the second insulation chamber and the refrigerant; and (e) a refrigerant that sucks in, compresses, and discharges the refrigerant. (f) a refrigerant condenser for condensing refrigerant; (g) a refrigerant evaporator for evaporating refrigerant; (h) supplying refrigerant discharged from the refrigerant compressor to the refrigerant condenser; a first refrigerant path that supplies the refrigerant to the first indoor heat exchanger and causes it to be sucked into the refrigerant compressor; (i) supplies the refrigerant discharged from the refrigerant compressor to the refrigerant condenser; (j) a second refrigerant path that supplies the refrigerant to a second indoor heat exchanger and causes it to be sucked into the refrigerant compressor;
(k) a third refrigerant path that supplies the refrigerant to the indoor heat exchanger, and then the refrigerant evaporator and the refrigerant compressor; (k) the first refrigerant path, the second refrigerant path, and the refrigerant path; A refrigerating/heating storage device comprising a switching means for switching between a third refrigerant path and a third refrigerant path.