JPS61150818A - Air conditioner for automobile - Google Patents

Abstract

PURPOSE:To make the cooling with an immediate effect possible by assembling an evaporator which receives the supply of a refrigerant from an air conditioner mounted on a vehicle into a heat insulating tank for storing warm water, and cooling the water within the tank to low temperatures, and using the cooled water. CONSTITUTION:Into an heat insulating tank 11 for storing warm water or cold water, an evaporator 10 for storing and cooling the water, which has a function of cooling the stored water within the tank, is assembled. When starting the cooling in the state that the cold water is stored within the heat insulating tank 11, a switch 27 for storing and cooling is closed, and an amplifier 23 is operated to close electromagnetic valves 18, 19 and to open an electromagnetic valve 20, and a pump 21 is started. Therefore, a heater core 13 receives the circulation supply of the cold water through pipings 38, 39 from the heat insulating tank 11. On the other hand, a damper for air conditioning with an immediate effect which is assembled into a duct 36 is located in the position where all of air to be air-conditioned flowing into the duct 36 by the command of the amplifier 23 are passed through the heater core 13. For this reason, it is possible to effectively obtain the effect of rapid cooling in the period when the evaporator 7 for cooling is not cooled immediately after starting the cooling.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an air conditioner for an automobile equipped with a cold water storage tank for performing immediate cooling when cooling is started.

[Prior art] In conventional air conditioners, refrigerant is not sufficiently supplied to the evaporator until a certain period of time has passed after the refrigerant compressor is started, so the air conditioner remains hot for a while after the cooler switch is turned on. I had to put up with it.

It was especially excruciating to get into a car that was parked in the hot sun.

On the other hand, a method is already known in which a portion of the engine cooling water that reaches a high temperature while the vehicle is running is stored in a heat retention tank and used as an immediate heating heat source when starting the next morning in cold weather or when driving at low speeds. ing.

[Problems to be Solved by the Invention] The present invention is capable of generating and storing cold water by incorporating an evaporator that receives refrigerant from an on-vehicle air conditioner into a heat-retaining tank for storing hot water, which becomes unnecessary in the summer. It is an object of the present invention to provide an air conditioner for an automobile that can also serve as a heat insulating tank and perform immediate cooling using this cold water.

[Means for Solving the Problems] In order to achieve the above object, the automotive air peace device of the present invention incorporates a cooling evaporator, a hot water heater core, a blower, a damper for switching the flow path of the air in the duct, etc. an air conditioning duct equipped with an inlet and an outlet for conditioned air; a heat insulating tank for storing cold water for rapid cooling; an evaporator for water cooling W built into the heat insulating tank; A transportation piping for passing cold water into the heater core, a solenoid valve and a water pump interposed in the transportation piping, and when cooling water in the heat retention tank,
A configuration comprising a control means for closing a solenoid valve interposed in the operation piping to stop the water pump, opening the solenoid valve at the start of cooling, and starting the water pump. Adopted.

[Function] The automotive air conditioner of the present invention configured as described above allows a part of the cooling refrigerant to flow into the evaporator installed in the heat insulating tank while normal cooling is being performed. The water present in the tank is cooled to a low temperature of 2°C, for example, and stored as cold water. When you get into a car parked in the hot sun and turn on the instant cooling switch, the cold water in the insulating tank is forced to flow into the heater core by the pump, and the damper in the duct where the heater core is housed also works in conjunction to cool the duct. Cold air is blown out from the outlet in an extremely short period of time.

In winter, the heat insulating tank acts as a reservoir for engine cooling hot water, providing an immediate heating effect.

[Example] Below, the content of the present invention will be specifically explained based on the accompanying drawings.

FIG. 1 is a system diagram of the apparatus of the present invention, in which 1 is a multi-cylinder compressor for compressing refrigerant, and is provided with one discharge port 1a and two suction ports 1b and 1C. 2 is a pulley for transmitting the rotational force of the automobile engine 14 to the compressor 1; 3 is a magnetic clutch for making it possible to transmit the rotational force of the engine to the compressor 1 intermittently.

4 is a condenser for liquefying the gas phase refrigerant compressed by the compressor 1; 5 is a receiver for storing the liquefied refrigerant; 6 is a temperature-operated expansion valve; 34 is a heat-sensitive cylinder; 1 is an evaporator for cooling;
Reference numeral 8 denotes a blower that blows conditioned air into the air conditioning duct 36. 9 is a constant pressure expansion valve; 11 is a heat insulating tank for storing hot water or cold water; 10 is a cold storage evaporator for cooling the water stored in the heat insulating tank 11; and 12 is interposed in a refrigerant return path 37 downstream of the evaporator 10. It is a check valve. The end of the refrigerant return path 37 is connected to the multi-cylinder compressor 1
is connected to one or more cylinder suction ports 1C of a plurality of cylinders. 36 is a refrigerant return path of the cooling evaporator 7, the terminal end of which is connected to the suction port 1b for the remaining cylinders of the multi-cylinder compressor 1; 35 is a communication pipe between the two refrigerant return paths 36 and 37; A solenoid valve 17 is interposed in the path.

13 is a heater core housed in an air conditioning duct 36, and in addition to a water pipe connecting it to the engine water jacket, it is connected to operation pipes 38 and 39 to the heat retention tank 11, and these pipes are connected to each other. Solenoid valves 19 and 20 are interposed. 21 is a water pump for this line.

31 is a thermistor for detecting the temperature of engine cooling water, 32 is a thermistor for detecting the air temperature on the downstream side of the cooling evaporator 7, 33 is a thermistor for detecting the water temperature in the heat retention tank 11, 15 is for the engine radiator, and 16 is for the radiator. A water pump 18 is a solenoid valve for supplying engine cooling hot water to the heater core 13.

22 is an amplifier for controlling the supply of refrigerant to the cold storage evaporator 10 in the heat insulating tank; 23 is an amplifier for controlling the supply of cold water to the heater core 13; 24 is an amplifier for controlling the operation of the compressor magnetic clutch 3; 25 works together with the amplifier 23. This amplifier controls the supply of hot water inside the heat retention tank 11 to the heater core 13 during heating. 26 is the air conditioner switch,
27 is a cold storage switch for supplying refrigerant to the cold storage evaporator 10; 28 is a control lever for the vehicle interior temperature provided on the air conditioner control panel 60; and 29 is turned on when the lever 28 is moved to the strongest heating position. It is a limit switch for starting the amplifier 25, and 30 is an on-vehicle battery power source.

FIG. 5 is a schematic side sectional view of the air conditioning duct 36 of the device of the present invention, and 40 is a quick-acting air conditioning duct that controls on/off of the rapid cooling mode and rapid heating mode that utilize the cold water in the heat retention tank 11. Damper, 41 is a diaphragm for operating the damper 40, 42 is a solenoid valve for selectively supplying atmospheric pressure or negative pressure to the diaphragm 41, (a) is a negative pressure source, (b)
43 is an air communication port, 45 is an air mix damper, 45 is a damper for switching inside and outside air into the duct 36, and 47.
48 and 49 are defrost, face, and foot air outlets, respectively, and 50 and 51 are dampers for switching open/close states of each air outlet. Other symbols in the figure are the same as those already described.

Next, the operation of the apparatus of the present invention will be explained below, divided into four air conditioning modes: rapid cooling mode, rapid heating mode, normal cooling mode, and normal heating mode.

(Rapid cooling mode) When summer begins and cooling becomes necessary, by turning on the cold storage switch 27 at the same time as turning on the air conditioner switch 26 for the first time, the driving magnetic clutch 3 of the compressor 1 is activated and the refrigeration cycle is started. The high-temperature and high-pressure gas phase refrigerant discharged from the υ tube is cooled and liquefied in the condenser 4, and then flows into the receiver 5, where the excess refrigerant is temporarily stored. The refrigerant sent out from the receiver 5 passes through a temperature-operated expansion valve 6 to be depressurized and then is supplied to a cooling evaporator 7, while following a branch pipe downstream of the receiver 5 and passing through a constant-pressure expansion valve 9. After that, the water is also supplied to the cold storage evaporator 10 in the heat retention tank 11 to cool the water stored in the tank. When the water temperature in the tank decreases to a set temperature, for example, 2°C, the thermistor 33 sends a signal to the amplifier 22, which is inserted into the communication pipe 35 of the downstream refrigerant return path of both the cooling and cold storage evaporators 1 and 10. Since the solenoid valve 11 that is
Refrigerant from the cooling evaporator 1 is sucked into the suction port 1C of the compressor 1. At this time, the pressure downstream of the cooling evaporator, which is the high pressure side, is applied to the downstream of the cold storage evaporator 10, which is the low pressure side, and the pressure always exceeds the refrigerant supply operating pressure of the constant pressure expansion valve 9, so that the cold storage evaporator 10 Refrigerant supply to is stopped.

When cold water is stored in the heat retention tank 11 as described above, when the cold storage switch 21 is turned on again when cooling is started next time, the amplifier 23 is activated and the solenoid valve 18 and
9 is closed and the solenoid valve 2o is opened, and the water pump 21 is activated.
1 through pipes 38 and 39. (See the arrow in Fig. 2) On the other hand, the operating diaphragm 41 of the instant air conditioning damper 40 built into the air conditioning duct 3G is connected to the negative pressure source (a) based on the command from the amplifier 23. Since negative pressure is supplied through the solenoid valve 42 which has been switched to the communication side, the damper 40 is pulled by the diaphragm 41 as shown in FIG.
Since the position is such that all of the conditioned air flowing through the duct 36 passes through the heater core 13, which is cooled by cold water, the cooling evaporator 7 (and the cool storage evaporator 10) is not being cooled immediately after the cooler switch is turned on. Effective cooling can be performed, and rapid cooling effects can be obtained.

When the cooling evaporator 1 is gradually cooled and the air temperature on the downstream side reaches the set value for the appropriate cooling temperature, a signal is sent from the thermistor 32 to the amplifier 23, which closes the solenoid valves 19 and 20, and closes the solenoid valve 18. Open the valve and heat insulation tank 1.
1 and the heater core 13, and restore the communication state between the heater core 13 and the engine water jacket,
Water pump 21 is also stopped. At this time amplifier 23
Since this also issues a command to the solenoid valve 42 to switch it to the atmosphere communication side, the damper 40 is activated by the action of the diaphragm 41 to the extent that it prevents the cooled air passing through the cooling evaporator 1 from flowing into the heater core 13. @ (sideways position)
After that, it will automatically switch to normal cooling mode.

(Rapid heating mode) When the temperature control lever 28 is moved to the final heating position immediately after the engine is started and the engine cooling water that should heat the heater core 13 is cold, the limit switch 29 is turned on, the amplifier 25 operates, the solenoid valves 18 and 19 are closed, and the solenoid valve 20
When the valve opens, the water pump 21 starts, so the coater core 13 is filled with hot water in the heat insulating tank 11 that was stored during the previous vehicle run, while the communication with the engine water jacket is cut off. Rapid heating is performed by circulating supply. (See FIG. 2) The rapid air conditioning damper 40 now assumes a lateral closed position.

The engine coolant temperature gradually rises to the set temperature, e.g.
When the temperature reaches 5° C., the thermistor 31 sends a signal to the amplifier 25 to open both the solenoid valves 18, 19 and 20, and at the same time stop the water pump 21, so that the normal heating mode is automatically obtained from then on.

(Normal cooling mode) In this mode, the amplifier controls so that the solenoid valves 19 and 20 are kept closed and the solenoid valve 18 is kept open, regardless of whether the cold storage switch 27 is on or off.
The communication between the heat insulating tank 11 and the heater core 13 is cut off, while the heater core 13 and the engine water jacket are communicated with each other to maintain reheating of the conditioned air by the heater core 13. If the cold storage switch 21 is turned on at this time, the cold storage evaporator will naturally work and the water in the heat retention tank 11 will be cooled. (Refer to Figure 3) (Normal heating mode) In this mode, the solenoid valve 18.1 is
Both valves 9 and 20 are kept open, and as shown by the arrows in FIG. Hot water will be stored in the heat retention tank 11 for the next rapid heating.

In the above embodiment, the refrigerant is supplied to the cold storage evaporator 10 by turning on the cold storage switch 27, but this cold storage switch 21 is not necessarily provided, and the air conditioner switch 26 is turned on. As a result, the cold storage evaporator 10 is always on during cooling.
It may also be possible to supply refrigerant to the

Also, two suction ports for receiving gas phase refrigerant discharged from the first and second evaporators, which are referred to as FDS system in the industry and used in the present invention, respectively;
As the compressor equipped with one discharge port for mixing and compressing these refrigerants and delivering the mixture, any type of compressor other than the multi-cylinder type can be used as long as it is provided with two suction ports.

Furthermore, depending on the situation in the area where it is used, the heat retention tank can of course be freely used for immediate cooling without the immediate heating function.

Table 1 summarizes the operation states of the solenoid valves 18, 19 and 20 pump 21 and the immediate air conditioning damper 40 in each air conditioning mode.

Table 1 [Effects of the Invention] The automotive air conditioner of the present invention has the following effects.

By incorporating an evaporator that receives refrigerant from the cooling refrigerator into the heat insulation tank, the water in the tank is cooled to a low temperature of, for example, 2°C, and this cold water is used as an immediate cold heat source when the cooler is started. , the discomfort you feel until the air conditioner starts to work under the scorching sun in midsummer is significantly reduced.

(Effects of Example) A method is to store part of the engine cooling water that reaches a high temperature while the vehicle is running in a heat insulating tank and use it as a heat source for immediate heating when starting the next morning in cold weather or when driving at low speeds. As is already known, the drawback of this method is that the insulating tank occupies useless weight and space when heating is not needed. Therefore, in the present invention, as described above, the existence value of the heat retention tank is greatly increased by providing the heat retention tank with a cold water storage function and adding the extremely beneficial effect of immediate cooling action.

Switching between the instant heating function and the instant cooling function of the heat insulating tank and the heat storage or cold storage operation are automatically performed by the control device, so there is no need for any troublesome manual operations.

In addition, by simply incorporating a few parts other than the evaporator and its piping into a heat-retaining tank dedicated to instant heating, you can be relieved from the extreme discomfort you experience when getting into a car that has reached abnormally high temperatures under the scorching sun. Effects can be obtained.

[Brief explanation of drawings]

Figure 1 is a system diagram of the device of the present invention, and Figures 2, 3, and 4 show that the device is capable of rapid cooling (or rapid heating).
Figure 5 is a side sectional view of the air conditioning duct. It is. In the diagram 1... Compressor 4... Capacitor 5
... Receiver 6.9... Expansion valve 1... Evaporator for cooling 10... Evaporator for cold storage 11.
・・Thermal tank 13・Heater core 17~20・
...Solenoid valve 21...Water pump 22-25
...Amplifier 26...Air conditioner switch 27...
・Cold storage switch 28...Temperature control lever
31 to 33... Thermistor 40... Instant air conditioning damper

Claims (1)

[Claims] 1) Cooling evaporator, hot water heater core, blower,
An air conditioning duct with a built-in damper for switching the flow path of the air inside the duct, an inlet and an outlet for the conditioned air, an insulating tank for storing cold water for rapid cooling, and an insulating tank built into the insulating tank. a water cooling evaporator, a communication pipe for passing the cold water in the heat insulating tank into the heater core, a solenoid valve and a water pump interposed in the operation pipe, and a water cooling evaporator for passing the cold water in the heat insulating tank into the heater core; During cooling, the solenoid valve interposed in the communication pipe is closed and the water pump is stopped, and when cooling starts, the solenoid valve is opened;
An air conditioner for an automobile comprising a control means for starting the water pump.