JPH09267628A - Regenerative air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cool and heat a room for temporary sleep in a truck or the like by accumulating cold heat or hot heat in a regenerative material. SOLUTION: An evaporator 10 for cold heat regeneration is disposed in a case 16, and a pack 23 for cold/hot heat regeneration is cooled down and a cold/hot heat regenerative material is frozen by the evaporator 10 for cold heat regeneration at the time of driving a vehicle in summer by bringing the pack 23 for cold/hot heat regeneration into close contact with the tube surface of the evaporator 10 for cold heat regeneration. At the time of parking, a blower 21 for cooling is operated, and after the air in a chamber for temporary sleep sucked from an inlet opening is cooled down by the pack 23 for cold/hot heat regeneration, it is blown down from an outlet opening 19 in the chamber for temporary sleep. In winter, an electric heater 38 and a blower 37a for heating is operated at the time of driving the vehicle, the pack 23 for cold/hot heat regeneration is heated and the hot air is reserved in the cold/hot heat regenerative material. At the time of parking, only the blower 37a is operated, blown air is heated by the pack 23 for cold/hot heat regeneration, the heated air is circulated in a foot warmer 37, and the foot part of a temporally sleeping person is warmed up.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cold storage air conditioner in which a heating function is also added to a cold storage type cooling device for cooling a room by utilizing cold heat stored in a cold storage material, such as a vehicle (for example, a truck). ) Is suitable as an air conditioner for cooling and heating the nap room.

[0002]

2. Description of the Related Art Conventionally, as a cool storage type cooling device for cooling a nap room of a vehicle, a device disclosed in Japanese Patent Laid-Open No. 62-149509 has been known. , A nap room is formed, and a cooling unit is provided on the rear wall surface of the nap room. An inlet is provided in the lower part of the case of the cooling unit, and an outlet is provided in the upper part of the case. Is equipped with a cool storage cooler and blower.

The cold storage cooler comprises a refrigerant evaporator provided in a vehicle air-conditioning refrigeration cycle and a cold storage material that is cold stored in the evaporator. The cold evaporator is used by the refrigerant evaporator when the truck is running. And cool the regenerator material,
Then, when the driver takes a nap in the nap room when the truck is stopped (when the engine is stopped), the blower is operated to blow air to the air flow path of the regenerator material, and heat is generated between the regenerator material and the blast air. Exchange is performed to cool the blown air, and the cooled air is blown out from the air outlet into the nap room.

[0004]

However, the above-mentioned conventional device has only the cooling function at the time of nap, and cannot perform the heating function. Therefore, the applicant of the present invention pays attention to a pack-shaped member that stores a cool storage heat material that is a constituent element of a cool storage type cooling device, and stores heat in the pack-shaped member during traveling of the vehicle in the winter when heating is required. By releasing this accumulated heat when the truck is stopped (when the engine is stopped),
A cold storage air conditioner capable of exhibiting a heating function was also proposed in the patent application of Japanese Patent Application No. 7-6705.

In the device of this prior application, a common air-blowing means is used both during cooling and during heating, and during cooling and during heating.
Since the air flow path to the pack-shaped member is switched using a plurality of dampers, the structure of the air flow path becomes complicated,
The cost is high. Further, since a duct or the like for allowing warm air to reach the heating required area is integrally provided in the case of the cooling unit, the duct or the like becomes an obstacle in the summer when heating is not required, and habitability in the vehicle is hindered. In addition, since the device of the prior application becomes a dedicated type having both cooling and heating functions due to the presence of this duct or the like, it is not possible to share the cooling and heating type and the cooling type. Also, the cost will be further increased.

In view of the above points, the present invention aims to reduce costs by eliminating a complicated air flow path switching mechanism using a plurality of dampers in a cold storage heat air conditioner capable of performing both cooling and heating functions. To aim.

[0007]

The present invention employs the following technical means to achieve the above object. Claim 1
In the invention described in 5, the foot warmer (3) for warming the user's foot is provided in the heating required area outside the case (16) of the cold storage air conditioner.
7) is provided, and detachable air supply side and exhaust side ducts (35a, 35b) are provided in the openings (26, 27) provided in the case (16). ), A pack-shaped member (23) inside the air passage (24) capable of exchanging heat, and a space inside the foot warmer (37) are connected to each other, and the ducts (35a, 35b) or the foot warmer are connected. An electric heater (38) for heating air and a heating blower means (37a) are installed in (37), and further, an inlet (18) and an outlet (1) of the case (16).
9) and lid members (28, 29, 36a, 36b) that can be attached to and detached from the openings (26, 27), and the electric heater (38) is used during heat storage to store heat in the cold storage material of the pack-shaped member (23). ) And the air blower means (37a) for heating, and the inlet (18) and the outlet (19) are closed by the lid members (36a, 36b).
The heating air is circulated between the internal air flow path (24) and the space inside the foot heater (37), and the heat stored in the cold storage heat material is released to perform heating. The air blowing means (37a) is operated to circulate the air heated by the pack-shaped member (23) in the foot warmer (37).

According to the first to fifth aspects of the invention, if the cold heat stored in the cold heat storage material housed in the pack-like member (23) can only exert the cooling function in summer without operating the refrigeration cycle. Instead, in the winter, the heat stored in the same cold storage material is radiated by the foot warmer (37) to exert the heating function. Therefore, unlike the conventional case, it is possible to effectively utilize the components of the regenerative cooling system as they are without additionally installing a seat heating device using an electric heater in winter, and to provide a good heating function with an extremely simple structure. Can be realized.

Moreover, without blowing heated air into the room,
Since it circulates in a closed circuit, the foot warmer (3
Since the heat is gradually radiated from 7) to the outside, the limited heat source accumulated in the pack-shaped member (23) can be used for a long time and only the foot can be comfortably and mildly heated. Further, according to the present invention, the devices (35a, 35b, 37, 37a, 38) required for heat storage heating are installed in the case (1
6) It is installed outside, and there is no need to modify the structure of the case (16) side for the heating function. Therefore, a plurality of damper mechanisms for switching the air flow paths in the prior application device are not required, and the cost can be reduced.

As described above, since there is no need to modify the configuration of the case (16) side, the heat storage heating equipment (35a, 3a, 3a) is used in contrast to the cool storage air-cooling equipment (air-cooling type equipment).
5b, 37, 37a, 38) can be easily changed to a type for both cooling and heating. Therefore, it is possible to easily change the cool storage type cooling device (cooling only device) to the heating and cooling type at the store side, and it is possible to easily set the heat storage and heating function as an option. Has a great effect.

In particular, the present invention is applied to a vehicle as described in claims 4 and 5, and a predetermined area (a nap room or the like) in the vehicle compartment.
When the vehicle engine is stopped, it is possible to perform cooling and heating by utilizing the stored heat of the pack-shaped member (23).
Extremely useful. In addition, the code | symbol in the parenthesis of each said means shows the correspondence with the concrete means of embodiment mentioned later.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention shown in the drawings will be described. (First Embodiment) FIG. 1 shows a refrigerating cycle in the case where the present invention is applied to a cold storage air conditioner for a nap room for a truck. Reference numeral 1 denotes a compressor, a running engine for the truck (not shown). Is driven via the electromagnetic clutch 1a. Reference numeral 2 is a condenser for cooling and condensing the high-temperature, high-pressure gas refrigerant discharged from the compressor 1, and 3 is a liquid receiver for accumulating the liquid refrigerant condensed in the condenser 2 and for discharging only the liquid refrigerant.

Reference numeral 4 denotes a normally open solenoid valve for intermittently flowing the refrigerant flow,
Reference numeral 5 is a temperature-operated expansion valve as a pressure reducing means for decompressing and expanding the liquid refrigerant, and 5a is a temperature-sensitive cylinder thereof. Reference numeral 6 is a refrigerant evaporator for air conditioning of a truck driver's cab, and a truck driver's cab 12
(Refer to FIG. 2) It is installed in an air conditioning unit 13 arranged below the instrument panel 12a in front. Air is blown into the air conditioning unit 13 by a blower (not shown), and the blown air is cooled by the evaporator 6, and then passes through a heater unit (not shown) and an outlet mechanism, and a driver's cab (vehicle interior) 12
It is designed to blow out inside.

Reference numeral 7 is an air-conditioning refrigerant circuit having the above-mentioned cab air-conditioning equipment (5, 6), and the solenoid valve 4 connects and disconnects the refrigerant flow to the air-conditioning refrigerant circuit 7. Reference numeral 8 is a cold storage refrigerant circuit provided in parallel with the air conditioning refrigerant circuit 7, and 9 is a constant pressure expansion valve as a pressure reducing means for decompressing and expanding the liquid refrigerant flowing into the cold storage refrigerant circuit 8, the downstream side of which is predetermined. When the pressure drops below the pressure, the valve opens.

Reference numeral 10 denotes a cold-storage refrigerant evaporator (heat-storage heat exchanger) for storing cold in a nap room 14 installed behind the cab 12 of the truck. The evaporator 10 is installed in the case 16 of the cooling unit 15 installed in the nap room 14. A check valve 11 prevents the high-temperature refrigerant from flowing back from the air conditioning evaporator 6 side to the cold storage evaporator 10 and allows the refrigerant to flow in only one direction from the upstream side to the downstream side of the cold storage evaporator 10. It is something to flush.

FIG. 2 shows the device of the present invention as a nap room 14 for a truck.
The nap room 14 in which the bed 14a is arranged is formed behind the driver's cab 12 of the truck. The nap 14 and the driver's cab 12 can be partitioned by a curtain 17 or the like. Further, in the nap room 14, a cool storage heat air conditioning unit 15 is arranged on the side wall 14b at one end side in the vehicle width direction.

As shown in FIG. 2, the cold storage heat air conditioning unit 15 has a resin case 16 formed in a vertically long and thin rectangular parallelepiped shape. A suction port 18 for sucking the air is provided. This suction port 18 is for the cold storage air conditioning unit case 1
6 is formed over substantially the entire area in the width direction of the front surface. In addition, a lattice-shaped air outlet 19 is provided in the upper front portion of the case 16 to blow cold air toward a side wall (not shown) on the other end side in the vehicle width direction. The cold storage heat air conditioning unit 15 is placed and fixed on a mounting stay 150 formed in a gate shape so as to straddle the end of the bed 14a.

An air supply side duct 35a for heating is provided on the front surface of the case 16 so as to extend above the bed 14a from a lower portion of the air outlet 19, and a lower rear surface of the case 16 is provided. An exhaust side duct 35b for heating is arranged so as to extend above the bed 14a. The ducts 35a and 35b are connected to a foot warmer 37 placed on the bed 14a. Details of the foot warmer 37 will be described later.

The blow-out port 19 is located inside a front panel 152 provided in the upper front portion of the case 16, and the control panel 15 is located on the side of the blow-out port 19 on the front panel 152.
3 are arranged. The control panel 153 is provided with operation switches and operation indicators of the cold storage heat air conditioner. In addition, in FIGS. 1 and 2, 30 is a high pressure side refrigerant pipe for cold storage,
Reference numeral 31 is a cold storage low-pressure side refrigerant pipe, 32 is an air-conditioning high-pressure side refrigerant pipe, and 33 is an air-conditioning low-pressure side refrigerant pipe, which is connected to the suction port of the compressor 1 after joining the cold-storage low-pressure side refrigerant pipe 31.

FIG. 3 is a view showing a state where the cold storage heat air conditioning unit 15 of the present invention is used for cooling, and FIG. 4 is a diagram showing a state where the cold storage heat air conditioning unit 15 of the present invention is used for heating. Yes, at the upper part inside the case 16, the outlet 1
An air flow path 20 communicating with 9 is formed. A centrifugal blower 21 having a centrifugal fan 21b driven by a motor 21a is arranged so as to be located in the air flow path 20.

At the lower part of the air flow path 20, the above-described cold-storage refrigerant evaporator 10 and the cold-storage pack 23 cooled by the evaporator 10 are installed. Where the evaporator 1
In this example, 0 has a structure as shown in FIG. 5, and is configured by using a multi-hole flat tube 10a made of aluminum. This multi-hole flat tube 10a is a cold storage pack 2
3 is formed in a flat cross section having a width L (see FIG. 3B) equivalent to that of No. 3, and a large number of holes for refrigerant passages are formed in parallel as is well known.

The flat tube 10a has bent portions at the upper and lower ends, and is formed so as to meander in the vertical (up and down) direction. Therefore, the flat surface of the flat tube 10a is arranged parallel to the vertical direction. 10b,
Reference numeral 10c is a refrigerant inlet / outlet pipe, and these pipes 10b, 1
Constant pressure expansion valve 9, check valve 11, refrigerant pipes 30, 31 at 0c
Are connected and housed in the case 16.

A plurality of cold storage heat packs 23 are arranged so as to be in close contact with the flat surfaces on both the left and right sides of the flat tube 10a of the refrigerant evaporator 10. That is, the cold storage heat packs 23 are closely arranged in the gaps between the flat surfaces of the flat tubes 10 a of the refrigerant evaporator 10. As shown in FIGS. 3 (a) and 5, the cold storage heat pack 23 is formed in a vertically elongated concave-convex shape, and water is contained inside a thin-walled pack-shaped (bag-shaped) member formed of resin, Alternatively, a soft gel-like cold storage material is enclosed.

Further, as the material of the pack 23, a material that is easily thinned, such as polyethylene or nylon, is preferable in order to improve heat exchange with the blown air. An air passage 24 is formed between the concave portion 23 a of the uneven heat storage heat pack 23 and the flat surface of the flat tube 10 a of the refrigerant evaporator 10. The cold storage heat pack 23 is adapted to be in close contact with the flat surface of the flat tube 10a of the refrigerant evaporator 10 at the convex portion 23b.

The air sucked into the case 16 from the suction port 18 passes through the air flow path 24, and then passes through the communication hole 22a provided in the upper holding plate 22 of the evaporator 10 to the air flow path 20. It is supposed to flow in. An elastic valve 18a made of an elastic material such as rubber is disposed inside the case 16 at a position inside the suction port 18. The elastic valve 18a always closes the suction port 18, and when the blower 21 operates, it receives the negative suction pressure of the blower 21 and elastically deforms to open the suction port 18.

Reference numeral 25 denotes a lower pressing plate of the evaporator 10, which has a discharge hole (not shown) for discharging condensed water generated in the evaporator 10. On the other hand, on the front surface of the case 16, a first opening portion 26 for taking out hot air at the time of heating is opened on the upper side portion, and on the rear surface of the case 16 on the lower side, during heating. A second opening 27 for circulating the warm air is opened.

FIG. 3 shows a state during cooling. The both opening portions 26 and 27 are made of resin lid members 28 and 2, respectively.
9 is mounted so that both openings 26 and 27 are closed. The lid members 28 and 29 can be easily attached to and detached from the openings 26 and 27 by utilizing the elasticity of the resin. FIG. 4 shows a state during heating. The lid members 28 and 29 are removed from the first and second opening portions 26 and 27, and the upper end portion (one end portion) of the air supply side duct 35a is attached to the first opening portion 26. ) Is fitted, and the upper end portion (one end portion) of the exhaust duct 35 b is fitted into the second opening 27. Then, the upper ends of the air supply side duct 35a and the exhaust side duct 35b are respectively attachable / detachable to / from the first and second openings 26, 27 by means of a locking mechanism (not shown) utilizing elasticity of resin. Is attached to. In addition, when heating, suction port 1
8 and the air outlet 19 are made of resin lid members 36a and 3 respectively.
6b is detachably attached, and the suction port 18 and the blowout port 19 are closed.

Reference numeral 37 denotes a foot warmer placed on the bed 14a of the nap room 14, which has a thin rectangular parallelepiped shape as shown in FIG. 2, and has a blower 3 for circulating warm air therein.
7a and a temperature sensor 37b for detecting the temperature of warm air are built in. The blower 37a is a well-known small centrifugal fan driven by a motor. Here, the case of the foot warmer 37 is made of a resin member, but since the foot of the nap person on the bed 14a is placed on the upper surface of the case of the foot warmer 37, A fin member (not shown) made of a metal having good thermal conductivity such as aluminum may be installed inside the case upper surface so that heat conduction to the case upper surface is good.

The air supply side duct 35a and the exhaust side duct 35b are for circulating warm air in the foot warmer 37 by the operation of the blower 37a, and are made of a resin having a heat insulating material adhered inside. ing. Both ducts 35a, 35b
The lower end (the other end) of the first warmer 37 provided on the foot warmer 37,
The second openings 37c, 37d are fitted into the second openings 37c, 37d, and are detachably attached to the openings 37c, 37d by means such as a locking mechanism (not shown) that also utilizes the elasticity of the resin.

In FIG. 4, the first and second openings 37c and 37d of the foot warmer 37, into which the lower ends (the other ends) of the ducts 35a and 35b are fitted, are provided for the convenience of drawing.
Is shown on the lower side surface of the foot warmer 37, but in fact, as shown in FIG. 2, the side surface of the foot warmer 37 is provided with first and second openings 37c, 37d. In this example, an electric heater 38 is arranged near the upper end of the exhaust duct 35b of the air supply duct 35a and the exhaust duct 35b. Although illustration of a specific form of the electric heater 38 is omitted, for example, a circular frame body corresponding to the air flow passage cross-sectional shape (circular shape) of the exhaust duct 35b is used as the electric heater 3.
8, the electric heater 38 may have a lattice structure in which corrugated heat radiation fins and plate heater elements are alternately assembled in the frame.

Although various materials can be used as the heater material of the electric heater 38, a positive temperature characteristic heater (PTC heater) having a characteristic that electric resistance rapidly increases at a predetermined temperature (Curie point) is used for temperature control. It is preferable because of its ease of use. Since the warm air heated by the electric heater 38 rises by natural convection, the second opening 27 to which the upper end of the exhaust duct 35b is connected is set at the lower part of the back surface of the case 16.

On the other hand, the first opening 26, to which the upper end of the air supply side duct 35a is connected, is set in the upper portion of the front surface of the case 16 in order to easily introduce the warm air that has risen inside the case 16. I am doing it. In addition, both the ducts 35a, 35
Flange portions 35c are integrally formed at both end portions of b, respectively, and the opening portions 26,
27, 37c, 37d can be reliably closed.

Reference numeral 40 denotes a temperature sensor for detecting the temperature of the cold storage heat pack 23, which is arranged in close contact with the surface of the cold storage heat pack 23. Although only one temperature sensor 40 is shown in FIGS. 3 and 4, two temperature sensors 40 are provided for temperature detection during cold storage and during heat storage. FIG. 6 is an electric control circuit diagram of the device of the present invention.
Is a vehicle power supply battery, 42 is a cold storage switch, 43 is a heat storage switch, 44 is a cooling switch, and 45 is a heating switch. 46 is an electric control device for cooling, and 47 is an electric control device for heating. The cooling electric control device 46 is arranged inside the front panel 152 of the case 15,
The operation of the blower 21 and the solenoid valve 4 of the refrigeration cycle is controlled in accordance with signals input from the switches 42 and 44 and the temperature sensor 40.

On the other hand, the electric control unit 47 for heating is used for the foot warmer 3.
7, the blower 37 is installed in response to signals input from the switches 43 and 45 and the temperature sensors 37b and 40.
a and the operation of the electric heater 38 are controlled.
Of the above switches, the cold storage switch 42 and the heat storage switch 43 are installed on a control panel (not shown) of a vehicle air conditioner installed near the instrument panel 12a in the cab 12. On the other hand, the cooling switch 44 for cold storage heat air conditioning of the nap room 14 is installed on the control panel 153 of the cold storage heat air conditioning unit 15. Further, the heating switch 45 for cold storage heat air conditioning of the nap room 14 is installed in the foot warmer 37.

Next, the operation of this embodiment in the above configuration will be described. When an air conditioner switch (not shown) is turned on while the truck is running (the engine is operating), the electromagnetic clutch 1a is energized, the compressor 1 is connected to the vehicle engine via the electromagnetic clutch 1a, and the compressor 1 is driven by the engine. ,Operate. Refrigerant circulates in the refrigeration cycle of FIG. 1 by the operation of the compressor 1. At this time, since the electromagnetic valve 4 is a normally open type, the refrigerant circulates in the air conditioning refrigerant circuit 7 through the electromagnetic valve 4. , Air conditioning unit 1 with evaporator 6 for air conditioning
The air blown by the blower 3 is cooled and dehumidified to air-condition the truck cab 12.

At this time, the constant pressure expansion valve 9 of the cold storage refrigerant circuit 8 does not have its downstream pressure reduced to a predetermined pressure (for example, 1.0 Kg / cm ² for the refrigerant R134a, evaporation temperature: -10 ° C). Therefore, keep the valve closed. When the cold storage switch 42 is turned on while the truck is traveling, an electromagnetic valve control circuit in the cooling electric control device 46 is started, and an energization signal is input from the control circuit to the electromagnetic valve 4 at a predetermined time interval, so that the electromagnetic valve The valve 4 is closed for a short time at predetermined time intervals. Then, the refrigerant to the air-conditioning refrigerant circuit 7 is shut off, so that the refrigerant suction action of the compressor 1 causes the pressure of the cold-storage refrigerant circuit 8 to rapidly decrease to the predetermined pressure or less, and the constant pressure expansion valve 9 opens. Speak. Since the constant pressure expansion valve 9 is opened intermittently only for a short time, the influence on the cooling action of the air conditioning evaporator 6 is extremely small.

The cold storage evaporator 10 serves to cool the cold storage heat pack 23 by supplying the refrigerant by intermittently opening the constant pressure expansion valve 9, and the cold storage heat material (water or the like) in the cold storage heat pack 23.
Freeze and store cold. At this time, the blower 21 in the cool storage heat air conditioning unit 15 is stopped (OFF),
Further, during cooling, as shown in FIG. 3, the first and second openings 26, 27 of the case 16 are closed by the lid members 28, 29. In addition, the suction port 1 is stopped by stopping the operation of the blower 21.
8 is closed by an elastic valve 18a. Furthermore, since the case 16 has an adiabatic structure having an adiabatic air layer (not shown), the surroundings of the cool storage evaporator 10 can be effectively insulated during the cold storage.

Therefore, the cool storage heat pack 23 can be efficiently cooled and stored by the cooling action of the cool storage evaporator 10. Further, it is also possible to effectively prevent the cool storage heat pack 23 from releasing the cool until the cool storage type cooling during parking is started after the cool storage is completed. Since the temperature of the cold storage heat pack 23 is detected by the temperature sensor 40, when the temperature of the cold storage heat pack 23 drops to a predetermined temperature (for example, −5 ° C.), the electric control device 46 determines that the cold storage is completed. Then, by stopping the intermittent energization of the solenoid valve 4, the cool storage evaporator 10
It is possible to stop the flow of the refrigerant to and automatically stop the cold storage operation.

On the other hand, when the driver or the like takes a nap in the nap room 14 while parked in the truck, the cooling switch 44 provided on the control panel 153 of the cold storage air-conditioning unit 15 is operated to turn the blower 21 on to the on-vehicle battery 41. To operate as. Then, the elastic valve 18a is opened by the suction negative pressure caused by the operation of the blower 21, and the nap chamber 1 is opened from the suction port 18.
The air inside 4 is sucked into the case 16, and the blown air passes through the air flow path 24 between the regenerator pack 23 and the evaporator 10 inside the case 16. At this time, the blown air is cooled by exchanging heat with the cold storage heat pack 23 to become cold air.
The cold air is blown into the nap chamber 14 from the air outlet 19 through the communication hole 22a and the air flow path 20 to cool the nap chamber 14.

Until the cold storage heat material in the cold storage heat pack 23 is completely melted and the temperature rises, the nap room cooling during parking can be performed. Next, when it is necessary to heat the nap room 14 during parking in the winter season, as shown in FIG. 4, the first and second openings 26, 27 of the case 16 cover the lid members 28, 2, 2.
9 is removed, and instead, the upper ends of the air supply side duct 35a and the exhaust side duct 35b are attached to the first and second openings 2 respectively.
Insert into 6 and 27 and connect. Further, the inlet 18 and the outlet 19 are closed by the lid members 36a and 36b, respectively.

Then, the heat storage switch 43 is turned on when the truck is running. Then, the electric controller 47 for heating causes the blower 37a in the foot warmer 37 and the exhaust side duct 35.
The electric heater 38 in b is energized, and the blown air of the blower 37a circulates between the inside of the foot warmer 37 and the inside of the case 16 via both ducts 35a and 31 as shown by the arrows in FIG.
At the same time, the blown air from the blower 37a is blown by the electric heater 3
It is heated by 8 to become warm air, and this warm air immediately flows into the lower part of the case 16 after being heated. When the hot air passes through the air flow path 24 in the case 16, heat can be exchanged with the cold storage heat pack 23 to store heat in the cold storage heat material in the cold storage heat pack 23.

Even during this heat storage, the above-mentioned case 1
The heat insulating structure in 6 can prevent the heat generated by the electric heater 38 from being released to the outside as much as possible, and effectively store heat in the cold heat storage material. Further, since the vehicle engine is operating during this heat storage and the battery charging generator is operating by the vehicle engine, there is no risk of over-discharging the battery 41 due to energization of the electric heater 38.

When the temperature of the cold storage heat pack 23 detected by the temperature sensor 40 rises to a predetermined temperature (for example, 80 ° C.), the electric control device 47 determines that the heat storage is completed, and the blower 37a and the electric power are supplied. It is possible to automatically stop the heat storage operation by stopping the power supply to the heater 38. When heating the nap room 14 during parking, the heating switch 45 is turned on. Then, the electric controller 46 energizes only the blower 37a in the foot warmer 37 to blow the blower 3a.
Only 7a is activated.

As a result, the blown air from the blower 37a circulates between the foot warmer 37 and the case 16 via both ducts 35a and 35b as shown by the arrows in FIG. Therefore, heat is exchanged between the blown air of the blower 37 a and the cold storage heat pack 23, and the blown air can be heated by the heat stored in the cold storage heat pack 23. The heated air circulates in the foot warmer 37 placed on the bed 14a in the nap room 14, where the foot of the nap person can be effectively heated.

In particular, in this example, the heated air is not blown into the nap chamber 14 but is circulated in the closed circuit, so that the cold storage heat air conditioning unit 15 gradually releases heat to the outside. The limited heat source stored in the cold storage heat pack 23 can provide long-term heating, and can comfortably and mildly heat only the foot. In addition, the temperature of the heated air in the foot warmer 37 is controlled by the temperature sensor 37b during heating of the nap room during parking.
When the detected temperature rises above a set temperature (for example, 45 ° C), the electric control device 47 for heating automatically stops the operation of the blower 37a, and the foot of the nap person is excessively moved. You can automatically prevent the heat.
When the temperature detected by the temperature sensor 37b falls below the set temperature, the electric controller 47 automatically starts the operation of the blower 37a. (Other Embodiments) The present invention can be implemented in various modes other than the above-described illustrated embodiment. For example, in the above-described embodiment, heated air (warm air) is supplied when the nap room is heated during parking. Although it circulates in the closed circuit shown in FIG. 4, the lid members 36a and 36b are removed to open the suction port 18 and the blowout port 19, and the air blower 21 in the case 16 is operated to operate the legs. The blower 37a in the warmer 37 is stopped, and the intake air from the suction port 18 is heated by the cool storage heat pack 23 by the operation of the cooling blower 21, and the blower port 19
It is also possible to adopt a usage pattern in which the air is blown out into the nap room 14 from.

In the above embodiment, the electric heater 38 is used.
Although the installation location of the electric heater 38 is set in the upper end portion of the exhaust duct 35b, for example, the installation location of the electric heater 38 may be set in the foot heater 37 near the second opening portion 37. It is also possible to install the blower 37a for heating not in the foot heater 37 but in the ducts 35a and 35b.
In addition to the truck, the device of the present invention may be used for a vehicle such as a one-box car for cooling and heating by stopping the engine when parking the space at the rear of the passenger compartment.

The flat tube 1 is used as the evaporator 10.
In addition to a type in which 0a is bent in a meandering shape, a large number of linear flat tubes 10a are arranged in parallel, and a refrigerant inlet / outlet tank is arranged at both ends of the parallel arranged flat tubes 10a (generally, (Called a multi-flow type) may be used.

[Brief description of drawings]

FIG. 1 is a cycle diagram showing a refrigeration cycle according to an embodiment of the present invention.

FIG. 2 is a schematic explanatory view showing an installation form of a cold storage heat air conditioning unit according to an embodiment of the present invention.

FIG. 3A is a partially cutaway front view of the cold storage heat air conditioning unit according to the embodiment of the present invention during cooling, and FIG. 3B is a schematic sectional view.

FIG. 4 is a schematic cross-sectional view during heating of the cold storage heat air conditioning unit according to the embodiment of the present invention.

FIG. 5 is a front view of the cool storage evaporator according to the embodiment of the present invention.

FIG. 6 is an electric circuit diagram in an embodiment of the present invention.

[Explanation of symbols]

10 ... Evaporator for cold storage, 14 ... Nap room, 14a ... Bed, 15 ... Heat storage air conditioning unit, 16 ... Case,
18 ... Suction port, 19 ... Blow-out port, 21, 37a ... Blower, 20, 24 ... Air flow path, 23 ... Cold storage heat pack, 28, 29, 36a, 36b ... Lid member, 35a,
35b ... air supply side, exhaust side duct, 37 ... foot warmer, 3
8 ... Electric heater.

Claims (5)

[Claims] 1. A pack-shaped member (23) accommodating a cold storage material having a cold storage heat storage function, a heat storage heat exchanger (10) for cooling the pack-shaped member (23), and the pack-shaped member (23). ) And an air passage (24) formed so as to be capable of exchanging heat with the air passage, and an air-blowing means (2) for cooling that blows air to the air passage (24)
1), the pack-shaped member (23), and the heat exchanger for cold storage (1
0), the air flow path (24), and the blower means (2)
1) A case (16) containing the same, and the air flow path (24) provided in the case (16)
An inlet port (18) for allowing air to flow into the case, and the pack member (2) provided in the case (16).
3) An outlet (19) for blowing the cool air cooled to the outside of the case (16), and a foot warmer (37) arranged in a heating required area outside the case (16) to warm a user's foot. ) And openings (26, 27) provided in the case (16)
Air supply side and exhaust side ducts (35a, 35b) that are detachably connected to the air flow path (24) in the case (16) and the space in the foot warmer (37). An electric heater (3) installed in both the ducts (35a, 35b) or the foot warmer (37) to heat air.
8) and a heating air blower (37a) for blowing air
And a lid member (28, which can be attached to and detached from the inlet (18), the outlet (19) and the opening (26, 27).
29, 36a, 36b), the electric heater (38) and the heating air-blowing means (37a) are operated, and the suction port (18) and the blowout port are stored during heat storage for storing heat in the cold storage material. (19) is closed by the lid members (36a, 36b) so that heated air is circulated between the air flow path (24) in the case 16 and the space in the foot warmer (37). In addition, during heat storage heating in which the heat stored in the cold storage heat material is released to perform heating, the air blower means (37a) for heating is operated, and the air heated by the pack-shaped member (23) is moved to the foot. A cool storage air conditioner characterized by being circulated in a warmer (37). 2. An opening (26) of the openings (26, 27), to which the air supply side duct (35a) is connected.
Is set at the upper part of the front surface of the case (16), and the opening (2) to which the exhaust side duct (35b) is connected.
7. The cold-storage heat air conditioner according to claim 1, wherein 7) is set in a lower portion of the back surface of the case (16). 3. The heating blower means (37a) is installed in the foot warmer (37), and the electric heater (38) is provided in the exhaust side duct (35b).
The cool storage heat air conditioner according to claim 2, wherein the cool heat storage air conditioner is installed in a portion close to the opening (27). 4. The case (16) is arranged in a predetermined area in the vehicle compartment, and a predetermined area in the vehicle compartment is cooled by the cool air blown out from the air outlet, and the foot warmer (37) is provided in the predetermined area in the vehicle interior. The cool storage heat air conditioner according to any one of claims 1 to 3, wherein the cool storage heat air conditioner is arranged in an area. 5. The case (16) is a vehicle nap room (1).
4) is provided on the side wall of the vehicle, and the inside of the vehicle nap room (14) is cooled by the cool air blown out from the outlet (19), and the foot warmer (37) is installed in the bed (14a) inside the vehicle nap room (14). ) Is arrange | positioned above, The cold-storage heat air conditioning apparatus of Claim 4 characterized by the above-mentioned.