JPH08192619A - Cold and heat storage type air conditioner - Google Patents

Abstract

PURPOSE: To cool and heat the napping space of a truck or the like by storing cold and heat in a cold and heat storage material. CONSTITUTION: An evaporator 10 for cold storage is laid in a case 16, and a cold and heat storage pack 23 is provided on the tube surface of the evaporator 10 in close contact therewith. In the summer season, the pack 23 is cooled with the evaporator 10 at the time of a vehicle travel to freeze a hot and cold thermal energy storage material. When the vehicle is parked, a fan 21 is operated to draw the air from a napping space via an intake port 18, and the air is cooled with the pack 23 before being blown to the napping space via a diffuser 19. In the winter, an electrical heater 29 as well as the fan 21 is operated to heat the pack 23 for storing heat in the cold and heat storage material. When the vehicle is parked, the fan 21 is operated and the supply air is heated with the pack 23. The hot air so prepared is circulated to the legs of a person taking a nap via a heating dust 151.

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, the blower is operated to blow air to the air flow path of the regenerator material, and heat is exchanged between the regenerator material and the blast air to blow air. The air is cooled 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, in order to obtain a heating function during a nap, a seat heating device using an electric heater is additionally installed, or the vehicle engine is operated during a nap to operate the hot water heating device of the vehicle air conditioner. There is.

The former seat heating device operates the electric heater when the engine of the vehicle is stopped, so that there is a problem that the vehicle-mounted battery is likely to be over-discharged due to the power consumption of the electric heater. Further, in the latter method, driving of the vehicle engine causes problems such as deterioration of fuel consumption and generation of noise. Therefore, the present invention focuses on a pack-shaped member that stores a cold storage heat material that is a component of a cold storage type cooling device, and stores the stored heat in the pack-shaped member during the winter when heating is required. It is an object of the present invention to provide a cool storage heat air conditioner capable of exhibiting a heating function by discharging.

[0006]

The present invention employs the following technical means in order to achieve the above object. In the invention according to claim 1, a pack-shaped member (23) accommodating a cold storage material having a cold storage heat storage effect, and this pack-shaped member (23).
A heat storage heat exchanger (10) for cooling the air, and an air flow path (20, 20 formed to exchange heat with the pack-shaped member (23).
24, 25, 29, 162, 40), and air blowing means (21) for blowing air to the air flow paths (20, 24, 25, 29, 162, 40), the pack-shaped member (23), and the cold storage Heat exchanger (10), the air flow path (20, 24,
25, 29, 162, 40) and the blower means (2
Case (16) incorporating 1) and this case (16)
And the air flow paths (20, 24, 25, 29,
162, 40), an inlet port (18) for allowing air to flow in,
The pack-shaped member (2) provided on the case (16)
The cold air cooled in 3) is passed through the air passages (20, 24, 2).
5, 29, 162, 40) and a heating means (29) provided in the case (16) for blowing air to the outside of the case (16) and for heating the blown air of the blower means (21). ) And provided in the case (16),
The air flow paths (20, 24, 25, 29, 162, 4
0) switching means (26, 27, 41) for switching, and during the heat storage for storing heat in the cold heat storage material by the heating action of the heating means (29), the blower means (21) is operated and , The damper means (26, 27, 4
According to 1), a circulation air flow path for circulating air in a closed circuit including the pack-shaped member (23), the blower means (21) and the heating means (29) is formed in the case (16), During heat storage heating in which the heat stored in the cold storage material is released to perform heating, the blower means (21) is operated to heat the blown air by the pack-shaped member (23) and the damper means ( 26, 27, 41)
Is characterized by a cold storage heat air conditioner that forms an air flow path that allows the heated air to reach a heating required area outside the case (16).

According to a second aspect of the present invention, in the cold storage air-conditioning apparatus according to the first aspect, the heating duct that causes the heated air to reach from the case (16) to the heating required area during the heat storage and heating ( 151), the heated air includes the pack-shaped member (23), the blower means (21), and the heating duct (151) at the time of the heat storage heating by the damper means (26, 27, 41). It is characterized in that it is configured to circulate in a closed circuit.

According to a third aspect of the present invention, in the cold storage heat air conditioner according to the first aspect, the heated air is guided from the inside of the case (16) to the heating required area at the time of the heat storage heating, and from the tip thereof. It is characterized by having a heating duct (154) configured to blow out the heated air. According to a fourth aspect of the invention, in the cold-storage heat air conditioner according to any one of the first to third aspects, the case (16) is arranged in a predetermined area (14) in the vehicle compartment, and the air outlet ( It is characterized in that a predetermined area (14) inside the vehicle compartment is cooled by the cold air blown out from (19) and the predetermined area (14) inside the vehicle compartment is heated by the heated air.

According to a fifth aspect of the present invention, in the cool storage heat air conditioner according to the second or third aspect, the case (1
6) is provided on the side wall of the vehicle nap room (14), and is cooled by the cold air blown out from the outlet (19).
While cooling the inside, the heating ducts (151, 1
54) is configured to extend onto the bed (14a) in the vehicle nap room (14).

The reference numerals in parentheses of the above-mentioned means indicate the correspondence with the concrete means described in the embodiments described later.

[0011]

According to the inventions of claims 1 to 5,
With the cold heat stored in the cold storage material stored in the pack-shaped member,
Not only can the cooling function in summer be performed without operating the refrigeration cycle, but in winter, the heating function can be exerted by the heat stored in the same cold storage material. Therefore, unlike the conventional case, the seat heating device using the electric heater is not additionally installed in the winter season, and the components of the regenerative cooling device are effectively used as they are, and a good heating function is achieved with an extremely simple structure. realizable.

In addition to the above-mentioned effects, according to the second aspect of the present invention, a heating duct is provided which allows heated air to reach from the inside of the case to the required heating area during heat storage heating, and a damper is provided during heat storage heating. Since the heating air is circulated in the closed circuit including the pack-shaped member, the blowing means and the heating duct by the means, heating is performed without blowing the heating air to the heating required area, and heat is radiated to the outside. Is gradually performed, it is possible to heat for a long time by the limited heat source stored in the cold storage heat material, and to comfortably and mildly heat only the heating required area.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. (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 truck running engine (not shown). Is driven via the electromagnetic clutch 1a. 2 is a condenser for cooling and condensing the high-temperature and high-pressure gas refrigerant discharged from the compressor 1, and 3 is this condenser 2
It is a liquid receiver that collects the liquid refrigerant condensed in 1. and draws out only the liquid refrigerant.

Reference numeral 4 is 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 (cooling means, cold 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.

Further, the suction port 1 is provided on the front surface of the case 16.
A heating duct 151 is arranged so as to extend from below the bed 8 onto the bed 14a. The air outlet 19 is located in a front panel 152 provided in an upper front portion of the case 16, and the air outlet 19 is provided in the front panel 152.
A control panel 153 is arranged on the side of. This control panel 1
At 53, operation switches of the cold storage heat air conditioner, operation indicators, and the like are installed.

In FIGS. 1 and 2, 30 is a cold storage high pressure side refrigerant pipe, 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.
After joining the low pressure side refrigerant pipe 31 for cold storage, it is connected to the suction port of the compressor 1. FIG. 3 shows a cold storage air conditioning unit 1 of the present invention.
5 is a diagram showing a disassembled state of FIG. 5, and FIG. 4 is a diagram schematically showing an air flow path in an assembled state, in which an air flow path 20 communicating with the air outlet 19 is formed in an upper part inside the case 16. ing. 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
0 is a multi-hole flat tube 10 made of aluminum in this example.
a (see FIG. 3). This multi-hole flat tube 10a is formed in a flat cross section having a width L (see FIG. 3) equivalent to the width of the cold storage pack 23, and as is well known, a large number of holes for refrigerant passages are formed in parallel. .

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 oriented in the vertical direction. Reference numerals 10b and 10c are refrigerant inlet / outlet pipes, and the low pressure expansion valve 9, the check valve 11 and the refrigerant pipes 30 and 31 are connected to the pipes 10b and 10c and housed in a 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 the drawing, the cold storage heat pack 23 is formed in a vertically elongated concave-convex shape, and water or a soft gel-like cold storage heat storage material is contained inside a thin-walled pack-shaped (bag-shaped) member formed of resin. 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 flow path is formed between the recess 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.
As shown by the arrow in FIG. 4, the blown air of the blower 21 passes through this air flow path and flows in the case 16.

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 thereof. Next, the assembly structure of the entire cool storage heat air conditioning unit 15 will be described in detail with reference to FIG. 3. The case 16 is divided into a resin front surface side case 160 and a resin rear surface side case 161. Both 160,
161 is integrally formed by screws (not shown). The inner surface of the front case 160 has a heat insulating material 16
3 is provided to enhance heat insulation. On the other hand, a partition plate 162a made of resin is arranged at a predetermined distance from the inner surface of the rear case 161 so that an air flow path 162 is formed between the partition plate 162a and the inner surface of the rear case 161. A material 164 is provided to enhance heat insulation. The partition plate 162a is fixed to the rear case 161 by means such as screwing.

On the other hand, inside the front case 160 made of resin, a plurality of rib members 160a are integrally formed. Similarly, a plurality of rib members 16 are also provided on the resin partition plate 162a.
2b is integrally molded. The rib members 160a, 1
Reference numeral 62b is a rectangular shape that extends in the horizontal direction and serves to guide the air passing through the air flow path formed by the recess 23a of the cold storage heat pack 23.
8 are arranged in a zigzag manner in order to uniformly disperse the air flow that flows in from 8 toward the cold storage heat pack 23.

Here, the staggered arrangement means that when the rectangular rib members 160a and 162b extending in the horizontal direction are arranged in multiple stages in the vertical direction, a plurality of rib members 1 are provided for each stage.
It means that 60a and 162b are arranged while being horizontally shifted. The rib members 1 are provided on the heat insulating materials 163 and 164.
Slits 163a, 16 into which 60a, 162b can be fitted
4a are formed, and the slits 163a and 164 are formed.
The rib members 160a and 162b project toward the cool storage evaporator 10 side through a.

Further, in this embodiment, the width of the cold storage heat pack 23 is set to be slightly larger than the width L of the flat tube 10a of the cold storage evaporator 10, and the front side and the rear side of the cold storage heat pack 23 are provided with the rib members 160a. , 162b to fix the cold storage heat pack 23 in the case 16. Therefore, the rib members 160a and 162b serve both as an air guide and as a pack fixing member.

Here, the width L of the cold storage heat pack 23 is set to be substantially the same as the width of the flat tube 10a of the cold storage evaporator 10, and the front surface of the flat tube 10a of the cold storage heat pack 23 and the cold storage evaporator 10 is set. Side and rear surface side rib member 16
Alternatively, the cold storage heat pack 23 and the flat tube 10a of the cold storage evaporator 10 may be fixed in the front-rear direction of the case 16 by being pressed by 0a and 162b.

On the left and right sides of the evaporator 10, resin side inner cases 165 and 166 are arranged. In the side inner cases 165, 166, a plurality of recesses 165a, 16 forming a plurality of air layers partitioned in the vertical direction are formed.
6a is formed to enhance the heat insulating effect. Here, by forming a plurality of air layers by partitioning in the vertical direction, natural convection of the air in the vertical direction can be prevented, so that the heat insulating effect can be further improved. At the same time, the side inner cases 165, 166 can be reinforced by the partition walls of the plurality of recesses 165a, 166a to secure the strength.

The side inner cases 165, 16
6 is fixed to both the cases 160 and 161 by screws. Further, on the upper side of the evaporator 10, an upper inner case 167 made of resin for fitting and holding the U-shaped bent portion of the upper portion of the flat tube 10a is arranged. A corrugated portion (not shown) into which the U-shaped bent portion of the flat tube 10a is fitted is formed on the upper inner case 167.

Further, the width of the upper inner case 167 is formed to be larger than the width L of the flat tube 10a of the cold storage evaporator 10, and communication ports 167a and 167b are formed in the front and rear portions of the upper inner case 167. It is open. The front side communication port 167a communicates the upper portion of the air flow path 24 (see FIG. 4) extending in the vertical direction on the front side of the cool storage evaporator 10 with the blowout side of the blower 21.

The communication port 167b on the rear surface side of the upper inner case 167 communicates with the suction side of the blower 21 at the upper part of the air passage 25 (see FIG. 4) extending vertically on the rear surface side of the cool storage evaporator 10. To do. Both of these communication ports 167a,
The plurality of 167b are partitioned by a reinforcing rib 167c. The blower 21 is attached to the upper part of the upper inner case 167.
Is arranged, and this blower 21 has a motor 21a,
Centrifugal fan 21b driven by this motor 21a
And a fan casing 21c that forms the air flow path 20 which is a blowing path of the centrifugal fan 21b.

The fan casing 21c is made of resin. The fan casing 21c has a scroll portion 21c-1 for accommodating the centrifugal fan 21b and an upper opening portion communicating with the outlet portion of the scroll portion 21c-1. 21
C-2, a lower opening 21C-3 communicating with the outlet of the scroll portion 21c-1, and the scroll portion 21c.
A blowout opening 21c-4 for communicating the outlet of -1 with the blowout port 19 is provided.

Here, the inlet of the scroll portion 21c-1 is a communication port 167b on the rear surface side of the upper inner case 167.
The lower opening 21C-3 is formed so as to communicate with the communication opening 167a on the front side of the upper inner case 167. Further, in the fan casing 21c, two dampers 26, 27 are provided at the outlet of the scroll portion 21c-1 so that the two shafts 26a,
It is rotatably installed by 27a. The openings 21c-2 to 21c- are formed by the two dampers 26 and 27.
4 is opened and closed as shown in FIG.

A resin heating duct case 28 is disposed above the blower 21. The duct case 28 constitutes an air flow path 29 (FIG. 4), and its lower surface portion is provided. , And has two openings 28a, 28b on the front surface side and the rear surface side. The front opening 28a is the upper opening 21C- of the fan casing 21c.
2, the opening 28b on the rear surface side communicates with the upper portion of the air flow path 162.

The electric heater 60 is arranged in the upper part of the air flow path 24 formed in the front case 160, more specifically, in a portion immediately below the front communication port 167a of the upper inner case 167. This electric heater 60 has a rectangular frame body 60a corresponding to the cross-sectional shape of the air flow path 24, and corrugated heat radiation fins and plate-shaped heater elements are alternately assembled in the frame body 60a. It consists of a lattice structure. The electric heater 60 can circulate air in the air flow direction (vertical direction) of the air flow path 24 as schematically shown in FIG.

As the heater material of the electric heater 60, various materials can be used, but 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. In addition, a flat tube 10a is provided below the evaporator 10.
A lower inner case 168 made of resin that fits and holds the U-shaped bent portion of the lower part of is disposed. The lower inner case 168 is formed with a corrugated portion 168a into which the lower U-shaped bent portion of the flat tube 10a is fitted and a reinforcing rib 168b.

The central portion of the upper half of the lower inner case 168 is formed in a dish shape having a concave portion for receiving drain water generated in the cold storage heat pack 23 portion during cooling, and the corrugated portion 168a is 2 A groove portion 168c is formed in the middle portion thereof to allow drain water to flow from the case front surface side to the rear surface side. On the dish-shaped bottom surface of the lower inner case 168, an inclined surface (downwardly inclined from the case front surface side to the rear surface side) so that the drain water smoothly flows from the case front surface side to the rear surface side along the air flow direction ( (Not shown) is provided, and a drain water discharge port (not shown) is opened at the lowest portion of this inclined surface. The drain water is discharged to the outside of the vehicle compartment from a drain hose (not shown) connected to the drain water discharge port.

On the upper part of the corrugated portion 168a, a heat insulating material 169 which is also formed in a corrugated shape is placed.
The U-shaped bent portion of the lower portion of the flat tube 10a is fitted and held via 69. A lower half portion of the lower inner case 168 forms an air flow path 40 (FIG. 4) through which heating air at the time of heating is provided, and the rear surface side of the air flow path 40 is formed by the communication port 168d. 162
Communicates with the lower end of the. The front side of the air flow channel 40 forms an opening 40a defined by a partition plate 168e. The upper opening 168f of the partition plate 168e is configured to be able to communicate with the lower end of the air flow path 24 through a communication port 168g. A shaft 41a of the damper 41 is rotatably arranged on the peripheral portion of the communication port 168g, and the communication port 168g and the suction port 18 are switched and opened and closed by the damper 41 (FIG. 4).

An opening 160b having a size corresponding to the openings 40a and 168f is opened at a portion of the front case 160 below the suction port 18. This opening 1
One end of a heating duct 151 having a flange 151a having a size capable of closing the opening 160b is connected to 60b. A partition plate 151b is disposed inside one end of the heating duct 151, and the partition plate 151b divides the duct internal flow path into two upper and lower flow paths 151c and 151d (FIG. 4). ing.

Since the end face of the partition plate 151b abuts on the end face of the partition plate 168e of the lower inner case 168, the heating duct 15
The first upper flow path 151c communicates with the opening 168f, and the lower flow path 151d communicates with the opening 40a. The other end of the heating duct 151 extends on the bed 14a of the nap room 14 as described above, and the tip of the bed 14a is closed without opening. Since the length of the partition plate 151b is set so as to end before this closed end portion, the two upper and lower flow paths 151c, 15 are provided.
1d communicates with the inside of the other end (closed end) of the duct 151. In this example, a foot rest 151e for resting the foot of a nap person is provided outside the other end (closed end) of the duct 151.

The shafts 26a, 27a, 41a of the three dampers 26, 27, 41 described above are connected to the link levers 42, 4
It is adapted to be rotated by one drive motor (drive means) 45 via 3, 44. Here, the link levers 42, 43, 44 and the motor 45 are housed in the side inner case 165. Reference numeral 46 denotes a temperature sensor that is arranged in the lower opening 40a of the lower inner case 168 and detects the temperature of warm air during heating. The opening 160c at the top of the front case 160
Is for mounting the front panel 152.

FIG. 5 is an electrical control circuit diagram of the device of the present invention.
Reference numeral 7 is a vehicle-mounted power battery, 48 is a cold storage switch, 49 is a heat storage switch, 50 is a cooling switch, and 51 is a heating switch. Reference numeral 52 is an electric control device, and these switches 4
The blower 21, the damper driving motor 45, and the operation of the solenoid valve 4 of the refrigeration cycle are controlled in accordance with signals input from the temperature sensors 46 to 51.

Of the above switches, the heat storage switch 49 and the cooling switch 50 are the instrument panel 1 in the cab 12.
It is installed on a control panel (not shown) of a vehicle air conditioner installed near 2a, while a cooling switch 50 and a heating switch 51 for cold storage heat air conditioning of the nap room 14 are provided on a control panel 153 of the cold storage heat air conditioning unit 15. Is installed. Next, the operation of this embodiment with 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 and the compressor 1
Is connected to the vehicle engine via the electromagnetic clutch 1a,
The compressor 1 is driven and operated by the engine.

By the operation of the compressor 1, the refrigerant circulates in the refrigeration cycle of FIG. That is, since the solenoid valve 4 is a normally open type, the refrigerant circulates through the solenoid valve 4 to the air-conditioning refrigerant circuit 7, and the blower air of the blower of the air-conditioning unit 13 is cooled and dehumidified by the air-conditioning evaporator 6. The truck cab 12
Air conditioning. At this time, the downstream pressure of the constant pressure expansion valve 9 of the refrigerant circuit 8 for cold storage is a predetermined pressure (for example, the refrigerant R134a).
In the case of, 1.0 Kg / cm ² , evaporation temperature: -10 ° C)
Since it does not drop below, keep the valve closed.

While the truck is running, the cold storage switch 48
When the power is turned on, the solenoid valve control circuit in the electric control device 52 is started, the energization signal is input to the solenoid valve 4 from the control circuit at a predetermined time interval, and the solenoid valve 4 is short-timed at every predetermined time interval. Close the valve. 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. This constant pressure expansion valve 9
Since the valve is opened intermittently for only a short time, the influence on the cooling effect of the air conditioning evaporator 6 is very small.

The cold storage evaporator 10 performs the cooling function of 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 (such as water) 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, the dampers 26, 27, 41 are operated at the same positions as when the heat is stored in FIG.
Is closed.

Further, heat insulating materials 163, 164, 169 are arranged around the cool storage evaporator 10, and a plurality of heat insulating air layers partitioned in the vertical direction are formed in the side inner cases 165, 166. Recesses 165a, 16
Since 6a is formed, the periphery of the cold storage evaporator 10 can be effectively insulated during the cold storage. Therefore, the cold storage heat pack 23 can be efficiently cooled and stored by the cooling action of the cold storage evaporator 10. Also, once the cold storage is completed,
It is also possible to effectively prevent the cold storage heat pack 23 from being cooled while the cold storage type cooling during parking is started.

On the other hand, when the driver or the like takes a nap in the nap room 14 while the truck is parked, the cooling switch 50 provided on the control panel 153 provided on the case 16 of the cool storage heat air conditioning unit 15 is operated to blow the fan 21. On-board battery 4
7 is used as a power source. At this time, the dampers 26, 2
The motors 7, 41 are operated by the motor 45 and the link levers 42, 43, 44 at the positions shown in FIG.

Therefore, the inlet 18 and the outlet 19
Is opened, the case 16 of the cold storage heat air conditioning unit 15
The air in the nap chamber 14 is sucked into the case 16 through the suction port 18 provided in the case 16, and the inside of the case 16 is shown in FIG.
The blown air flows in the path indicated by the arrow, and when the blown air passes through the air flow path between the cold storage heat pack 23 and the evaporator 10, it exchanges heat with the cold storage heat pack 23 and is cooled to become cold wind. The air is blown into the nap room 14 through the air passages 25 and 20 to cool the nap room 14.

Until the cold heat storage material in the cold storage heat pack 23 is completely melted and the temperature rises, the nap room can be cooled during parking. Further, the above-described heat insulating structure also serves to prevent the cooling air after heat exchange and the cold storage heat pack from being cooled during the cold storage type cooling. In addition, the case 16 has rib members 160a and 162b formed in a staggered arrangement, and the rib members 160a and 162b uniformly distribute air in a large number of air flow paths between the cold storage heat pack 23 and the evaporator 10. As a result, the blown air can be efficiently cooled in the entire area of the cold storage heat pack 23.

When the blown air is cooled by the cold storage heat pack 23, drain water (condensed water) is generated on the surfaces of the cold storage heat pack 23 and the tube 10a.
Since the tube 10a and the cold storage heat pack 23 are arranged in the vertical direction, the drain water drops downward along the vertical surface of the tube 10a and the cold storage heat pack 23, and enters the lower inner case 168. , A drain water discharge port provided in the lower inner case 168,
Drain water can be smoothly discharged to the outside of the vehicle through the drain hose.

Next, when it is necessary to heat the nap room 14 during parking in winter, the heat storage switch 49 is turned on when the truck is running. Then, the electric controller 52 energizes the blower 21 and the electric heater 60 in the cold storage heat air conditioning unit 15 and operates the damper driving motor 45 to move the dampers 26, 27 and 41 to the positions shown in FIG. 4B. Manipulate.

As a result, as shown by the arrow in FIG. 4 (b), the blown air is blown in a closed circuit including the blower 21, the electric heater 60, and the evaporator 10 and the cool storage heat pack 23 in the cool storage heat air conditioning unit 15. A circulating air flow path is formed to circulate through. Therefore, heat is exchanged between the high-temperature heated air heated by the electric heater 60 and the cold storage heat pack 23,
It is possible to store heat in the cold storage material.

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 60 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 47 due to energization of the electric heater 60.

When the nap room 14 is heated during parking, the heating switch 51 is turned on. Then, the blower 2 in the cool storage heat air conditioning unit 15 is controlled by the electric control device 52.
1 is energized and the damper driving motor 45 is operated to operate the dampers 26, 27 and 41 to the positions shown in FIG. 4 (c). As a result, as shown by the arrow in FIG. 4C, the blower 21, the evaporator 10, the cool storage heat pack 23 portion, and the heating duct 151 are included between the cool storage heat air conditioning unit 15 and the heating duct 151. A circulating air flow path for circulating blast air is formed in a closed circuit.

Therefore, heat is exchanged between the blown air of the blower 21 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 to the tip of the heating duct 151, and the duct tip extends to the bed 14a in the nap chamber 14, so that the foot of the nap person can be effectively heated.

In particular, in this embodiment, the heated air is circulated in the closed circuit without being blown out into the nap chamber 14, so that the cold storage heat air conditioning unit 15 gradually releases heat to the outside. Therefore, it is possible to heat for a long time by the limited heat source stored in the cold storage heat pack 23 and to comfortably and comfortably heat only the foot portion. Further, the temperature of the heated air is detected by the temperature sensor 46, and when the detected temperature rises above a set temperature (for example, 40 ° C.), the electric control device 52 automatically stops the operation of the blower 21 and the sleeper Automatically prevent the foot from overheating. When the temperature detected by the temperature sensor 46 falls below the set temperature, the electric controller 52 automatically starts the operation of the blower 21.

FIG. 6 is a table showing a summary of the device operation modes in each air conditioning mode in the above-described first embodiment. (Second Embodiment) In the first embodiment, the heating air (warm air) is circulated in the closed circuit shown in FIG. 4 (c) at the time of heating, but in the second embodiment, the heating is performed. Duct 15
In place of 1, the heating duct 154 shown in FIG. 7 having an open front end 154a is provided, and the heating duct 154 is
It is connected to the front side opening 40 a of the air flow path 40 of the lower inner case 168 of the cold storage heat air conditioning unit 15.

As a result, in the second embodiment, the heated air that has passed through the air flow path 40 during the heat storage heating flows into the heating duct 154, and the foot portion 154a of the duct 154 causes the foot portion of the nap person. Blow up in the vicinity and take a nap room 1
4 heating. (Third Embodiment) As shown in FIG. 8, an opening 151f is provided in the middle of a partition plate 151b of the heating duct 151 in the first embodiment, and a damper 151g for opening and closing the opening 151f is installed. Furthermore, this damper 1
A motor 151h for driving 51g is installed and the damper 1
The opening of 51 g is controlled according to the temperature detected by the temperature sensor 46.

That is, as the detected temperature of the temperature sensor 46 rises, the opening amount of the opening 151f increases (the opening of the damper 151g increases), so that the electric control unit 5
2 controls the motor 151h. By such damper control, the amount of warm air reaching the duct tip (foot of the nap person) can be adjusted according to the warm air temperature.

The opening amount of the opening 151f is shown in FIG.
As shown in (d), the blower 21 is stopped when the damper 151g is fully closed and the flow path to the tip end side of the heating duct 151 is completely closed. Note that the present invention can be implemented in various modes other than the illustrated embodiments described above. For example, in addition to a truck, in a vehicle such as a one-box car, the engine is stopped by cooling the space at the rear of the passenger compartment when the vehicle is parked. The device of the present invention may be used for such purposes.

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. Further, in the above-described embodiment, the upper inner case 167 is directly fitted to the U-shaped bent portion on the upper portion of the evaporator 10.
A corrugated heat insulating material similar to the heat insulating material 169 may be interposed between 0 and 167 to enhance the heat insulating property.

Further, although the electric heater 60 is used as a heat source for storing heat in the above-described embodiment, a hot water heater using vehicle engine cooling water (hot water) as a heat source is installed in place of the electric heater 60. Alternatively, heat may be stored in the cold storage heat material in the cold storage heat pack 23.

Further, in the above-described embodiment, the dampers 26, 2
Although the positions of 7, 41 are automatically controlled by the motor 45, the positions of the dampers 26, 27, 41 may be operated by the manual operation force of the user. Further, in the above-described embodiment, the electric heater 60 is installed on the air flow path 24 side (front side case 160 side), but the electric heater 60 is installed on the air flow path 25 side (rear side case 161 side). May be.

Further, as a modification of the second embodiment shown in FIG. 7, the heating duct 154 may be eliminated and hot air may be blown directly from the front opening 40a of the air passage 40.

[Brief description of drawings]

FIG. 1 is a cycle diagram showing a refrigeration cycle in a first 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 the first embodiment of the present invention.

FIG. 3 is an exploded perspective view of the cold storage heat air conditioning unit according to the first embodiment of the present invention.

FIG. 4 is a schematic sectional view showing an air flow path in each air conditioning operation mode according to the first embodiment of the present invention.

FIG. 5 is an electric circuit diagram in the first embodiment of the present invention.

FIG. 6 is an explanatory diagram summarizing each air conditioning operation mode in the first embodiment of the present invention.

FIG. 7 is a schematic sectional view showing an air flow path in each air conditioning operation mode according to a second embodiment of the present invention.

FIG. 8 is a schematic sectional view showing an air flow path in each air conditioning operation mode according to a third embodiment of the present invention.

[Explanation of symbols]

10 ... Evaporator for cold storage, 10a ... Tube, 14 ...
Nap room, 15 ... Cooling heat storage air conditioning unit, 16, 160,
161 ... Case, 18 ... Inlet, 19 ... Outlet,
21 ... Blower, 20, 24, 25, 29, 40, 16
2 ... Air flow path, 23 ... Cold storage heat pack, 26, 27,
41 ... Damper, 60 ... Electric heater, 151,154
……damper.

Front page continued (72) Inventor Kenichi Fujiwara 1-1, Showa-cho, Kariya city, Aichi Nihon Denso Co., Ltd.

Claims (5)

[Claims] 1. A pack-shaped member accommodating a cold storage material having a cold storage effect, a heat storage heat exchanger for cooling the pack-shaped member, and an air flow path formed so as to be capable of exchanging heat with the pack-shaped member. An air blowing means for blowing air to the air flow path, a case containing the pack-shaped member, the heat exchanger for cold storage, the air flow path, and the air blowing means, and the air flow path provided in the case. An inlet for introducing air into the case, an outlet provided in the case for blowing out the cool air cooled by the pack-shaped member from the air flow path to the outside of the case, and provided in the case for the air blower. A heating unit that heats blown air and a damper unit that is provided in the case and that switches the air flow path are provided. When the heat is stored in the cold heat storage material by the heating action of the heating unit, the blower is used. The damper means forms a circulating air flow path in the case in which air circulates in the closed circuit including the pack-shaped member, the blower means, and the heating means, and the heat storage material stores heat in the cold storage material. At the time of heat storage heating in which the generated heat is released to perform heating, the blower means is operated to heat the blown air by the pack-shaped member, and the heated air is heated by the damper means outside the case. Cool air conditioning system characterized by forming an air flow path to reach the air conditioner. 2. A heating duct that allows the heated air to reach the heating required area from inside the case during the heat storage heating, and the heating air is blown by the damper means during the heat storage heating. The cool storage air conditioner according to claim 1, wherein the cool storage air conditioner is configured to circulate in a closed circuit including the blower unit and the heating duct. 3. A heating duct configured to guide the heated air from the inside of the case to the heating required area and blow out the heated air from a tip portion thereof during the heat storage heating. The cold storage air conditioner according to claim 1. 4. The case is arranged in a predetermined area in the vehicle interior, and is configured to cool a predetermined area in the vehicle interior by the cool air blown out from the air outlet and to heat a predetermined area in the vehicle interior by the heated air. The cold storage heat air conditioner according to any one of claims 1 to 3, which is provided. 5. The case is arranged on a side wall of a vehicle nap room, and is configured to cool the vehicle nap room by cool air blowing from the air outlet and to extend the heating duct onto a bed in the vehicle nap room. The cool storage heat air conditioner according to claim 2 or 3, characterized in that.