JP2007001543A - Air conditioner for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner for a vehicle provided with a simplified heat storing/cold radiating means without being increased in size. <P>SOLUTION: This air conditioner is provided with a refrigerating cycle device 9 having at least a compressor 3 for forcibly feeding coolant, a heat radiating device 2 for radiating heat of the coolant, a pressure reducer 5 for reducing pressure of the coolant from the heat radiating device 2 side, and an evaporator 15 evaporating the coolant reduced in pressure to cool air to be delivered into a cabin. The air conditioner is provided with a cold storage liquid medium supplying means for supplying water as a cold storage liquid medium to a heat transfer surface 6 of the evaporator 15 to be in contact with the heat transfer surface 6. The cold storage liquid medium supplying means has a spraying means 20 for supplying water in a foggy state to the evaporator 15, a tank 23 for a liquid reservoir to collect water flowing down from the heat transfer surface 16 and a pump 19 for circulation to carry the water stored in the tank 23 to the spraying means 20. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle air conditioner that cools the interior of a vehicle by sending cold air stored when the vehicle is stopped together with air.

  Conventionally, an engine control that realizes a function called an idling stop function or an engine automatic stop function is known. This control automatically stops the engine of a vehicle when a predetermined stop condition is satisfied. Sometimes called idling stop. In the control for realizing the idling stop function, the engine is automatically stopped when a predetermined stop condition is satisfied, and the engine is restarted when a predetermined restart condition is satisfied. When the engine is stopped by the idling stop function, the compressor of the refrigeration cycle is not operated, so that the vehicle air conditioner cannot supply cooling air to the vehicle interior.

As a countermeasure for air conditioning when the engine is stopped, a conventional vehicle air conditioner encloses a regenerator material in the evaporator of the refrigeration cycle, and accumulates cold energy (accumulates heat) from the regenerator material and takes out the cold energy (cooling). In addition, there is known one that cools the passenger compartment when the engine is stopped (for example, see Patent Document 1). Moreover, what was equipped with the thermal storage container which enclosed the thermal storage material in the refrigerating cycle is known (for example, refer patent document 2).
JP 2004-184071 A JP-A-7-76208

  However, the vehicle air conditioner described in Patent Document 1 requires a space for enclosing the regenerator material in the evaporator, which causes a problem that the evaporator becomes large. In addition, in the vehicle air conditioner described in Patent Document 2, a heat storage container is required separately, and a configuration for switching the flow path of the cooling water circuit at the time of cold storage and cooling is necessary. There was a problem of increasing complexity.

  Accordingly, an object of the present invention is to provide a vehicle air conditioner including simplified heat storage / cooling means without increasing the size.

  In order to achieve the above object, the following technical means are adopted. That is, the invention described in claim 1 includes a compressor (3) that pumps the refrigerant, a radiator (2) that radiates the pumped refrigerant, and a decompressor (10) that depressurizes the refrigerant from the radiator side. 5) and an evaporator (15) for evaporating the decompressed refrigerant to cool the air blown into the passenger compartment, and a vehicle air conditioner comprising at least a refrigeration cycle device (9), A cold storage liquid medium supply means for supplying the cold storage liquid medium so as to contact the heat transfer surface (16) of the evaporator (15) is provided.

  According to the first aspect of the present invention, the simplified heat storage / cooling means is constituted by the cold storage liquid medium supply means that exposes the cold storage liquid medium and contacts the evaporator, so that during the engine operation, A cold air is stored in the liquid medium, and when the engine is stopped, an air conditioner for a vehicle that can move the stored cold heat to the blown air via the cold storage liquid medium and supply the air as cooling air in the vehicle is obtained.

  According to a second aspect of the present invention, in the vehicle air conditioner according to the first aspect, the cold storage liquid medium supply means sprays the cold storage liquid medium onto the evaporator (15). It is characterized by including.

  According to the second aspect of the present invention, since the cold storage liquid medium is sprayed by the spraying means, a thin liquid film is easily formed on the heat transfer surface of the evaporator, so that the cold storage efficiency can be improved. . Similarly, the efficiency of cooling to air can be improved.

  According to a third aspect of the present invention, in the vehicular air conditioner according to the second aspect, the spraying means (20) sprays the cold storage liquid medium toward an upper portion or an upper portion of the evaporator (15). It is characterized by.

  According to the third aspect of the present invention, since a liquid film can be formed from the upper part to the lower part of the heat transfer surface of the evaporator, it is possible to efficiently store and cool the heat efficiently using the heat storage / cooling effective area. It can be performed.

  According to a fourth aspect of the present invention, in the vehicle air conditioner according to the second or third aspect, the spraying means (20) sprays the evaporator (15) toward a plurality of locations. And

  According to the fourth aspect of the present invention, by the structure in which the evaporator is sprayed toward a plurality of locations, efficient heat storage / cooling can be performed with a large use of the heat storage / cooling effective area.

  According to a fifth aspect of the present invention, in the vehicle air conditioner according to the second, third, or fourth aspect, the spray means (20) extends in a direction substantially perpendicular to the blowing direction of the blown air. Thus, it sprays toward the said evaporator (15).

  According to the fifth aspect of the present invention, efficient cold storage and cooling can be performed using a wide heat transfer area of the evaporator. For example, when spraying to expand in the vertical direction, left-right direction, or diagonal direction with respect to the heat transfer surface of the evaporator, the heat transfer efficiency that is most suitable for the position and shape of the heat transfer surface of the evaporator A liquid film can be formed at a location to perform efficient cold storage and cooling.

  Invention of Claim 6 is a vehicle air conditioner in any one of Claims 1-5. WHEREIN: The said cold storage liquid medium supply means contains the circulation pump (19) which circulates the said cold storage liquid medium, In the process of circulation by the circulation pump (19), the cold storage liquid medium is supplied to the heat transfer surface (16) of the evaporator (15).

  According to the sixth aspect of the present invention, the regenerative liquid medium is circulated in a predetermined flow path, and is supplied to the heat transfer surface of the evaporator in the flow path, thereby making the circulation as independent as possible from other parts. When a cold storage liquid medium is placed in the flow path, the release of cold heat stored in the cold storage liquid medium can be suppressed.

  A seventh aspect of the present invention is the vehicle air conditioner according to the sixth aspect, wherein a liquid storage tank (23) is provided in a flow path (25) for circulating the cold storage liquid medium. To do.

  According to the seventh aspect of the present invention, by storing the cold storage liquid medium in the tank, it is possible to take out the cold storage liquid medium at a required flow rate from the tank and supply it to the heat transfer surface of the evaporator. .

  The invention according to claim 8 is the vehicle air conditioner according to claim 7, wherein the circulation pump (19) is provided in the tank (23).

  According to the eighth aspect of the present invention, piping for connecting the suction part of the circulation pump and the tank becomes unnecessary, the circulation flow path can be shortened, and the apparatus can be miniaturized.

  According to a ninth aspect of the present invention, in the vehicle air conditioner according to the sixth, seventh, or eighth aspect, a recess (18) is provided below the evaporator (15) for receiving the cold storage liquid medium flowing down. The case is provided with a structure in which the inside of the recess (18) communicates with the suction portion of the circulation pump (19).

  According to the ninth aspect of the present invention, the cold storage liquid medium flowing down the heat transfer surface of the evaporator is surely recovered, and the efficiency of cold storage and cooling can be improved.

  A tenth aspect of the present invention is the vehicle air conditioner according to any one of the first to eighth aspects, wherein the cold storage liquid medium is supplied by the cold storage liquid medium supply means while the air conditioner switch (14) is turned on. It is characterized by continuing.

  According to the tenth aspect of the present invention, when the user wants to operate the air conditioner (when switched on), the cold storage liquid medium is continuously supplied to the heat transfer surface of the evaporator. When the engine is running with the air conditioner switched on, cold energy is always stored in the cold storage liquid medium, and when the engine is stopped with the air conditioner switched on, the stored cold heat is moved to the blown air and supplied to the vehicle as cooling air. A vehicle air conditioner that can efficiently supply cold heat to the liquid medium is obtained.

  The invention described in claim 11 is characterized in that, in the vehicle air conditioner according to any one of claims 1 to 10, water is used as the cold storage liquid medium.

  According to the eleventh aspect of the present invention, the drain water collected from the condensed water adhering to the evaporator during operation of the refrigeration cycle apparatus is stored cold by bringing water as a cold storage liquid medium into contact with the heat transfer surface of the evaporator. It can be used as a liquid medium. Further, there is an effect that it is easy to form a film on the heat transfer surface.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows a corresponding relationship with the specific means of embodiment mentioned later.

(First embodiment)
Below, 1st Embodiment is described using FIGS. 1-3. FIG. 1 is a schematic diagram showing a configuration of a vehicle air conditioner in the present embodiment.

  The vehicle air conditioner according to the present embodiment automatically stops the engine 4 to an idling stop state even when the air conditioner is in an ON state, for example, when a predetermined condition for the vehicle to stop due to a signal wait or the like is reached. Thus, it is used for a vehicle that reduces the amount of exhaust gas when the vehicle is stopped.

  In such a vehicle, since the power of the engine 4 cannot be obtained when the vehicle is stopped, the driving of the refrigeration cycle apparatus 9 is restricted when the vehicle is stopped, and the cooling output is reduced. As the engine stop time elapses, the temperature inside the vehicle rises, causing discomfort to the passenger. Therefore, the present invention performs heat storage / cooling by a configuration described later as an air conditioning measure when the engine is stopped, realizes supply of cooling air when the engine is stopped, and reduces passenger discomfort.

  First, the refrigeration cycle apparatus 9 of the vehicle air conditioner in the present embodiment will be described. As shown in FIG. 1, the vehicle air conditioner of the present embodiment includes a refrigeration cycle device 9, an engine 4 that transmits driving force to a compressor 3 that compresses refrigerant via a belt, and engine control that controls the engine 4. The engine ECU 1 as means, the air conditioner ECU 10 as air conditioner control means for transmitting timing for starting the engine 4 to the engine ECU 1, and the air conditioner operation panel 13 for transmitting setting information by the occupant to the air conditioner ECU 10. .

  In addition, the compressor 3 of this embodiment is good also as a structure driven with an electric motor. This is because when the vehicle air conditioner of the present embodiment is used in a hybrid vehicle or an electric vehicle, it can be driven by an electric motor using a large amount of power supplied from the hybrid vehicle or the electric vehicle.

  The refrigeration cycle apparatus 9 includes a compressor 3 that compresses and discharges a refrigerant at high temperature and pressure, and the compressor 3 is driven by an engine 4 via an electromagnetic clutch 7. The electromagnetic clutch 7 is ON / OFF controlled based on an ON / OFF signal output from the air conditioner ECU 10 to control the operation of the compressor 3.

  The gas refrigerant compressed to high temperature and high pressure by the compressor 3 flows into the radiator 2. The radiator 2 cools and condenses the internal gas refrigerant by running air of the vehicle and cooling air blown by an electric radiator fan (not shown). When the compressor 3 is composed of a variable capacity compressor, the refrigerating capacity can be controlled by changing the discharge capacity continuously or stepwise by the capacity control valve.

  A receiver 6 is provided on the refrigerant outlet side of the radiator 2. The refrigerant condensed by the receiver 6 is separated into a gas phase refrigerant and a liquid phase refrigerant, and the liquid phase refrigerant is once stored. An expansion valve 5 is provided on the outlet side of the receiver 6 as a decompressor for decompressing the liquid-phase refrigerant sent from the receiver 6, and the low-pressure gas-liquid two-phase refrigerant decompressed by the expansion valve 5 is evaporated. Evaporate in a vessel 15. In the present embodiment, the expansion valve 5 is a temperature-operated expansion valve 11 that controls the refrigerant flow rate by adjusting the opening degree so as to adjust the degree of superheat of the outlet refrigerant of the evaporator 15. For this reason, the refrigerant quantity is automatically adjusted according to the change in the passenger compartment temperature and the change in the rotation speed of the compressor 3.

  The temperature-actuated expansion valve 11 has a low-pressure refrigerant flow path 12 through which the outlet refrigerant of the evaporator 15 flows in a box-type housing, and a temperature sensing mechanism for the outlet refrigerant of the evaporator 15 is integrated in the housing. It is configured.

  The evaporator 15 cools the air in the passenger compartment by the latent heat of vaporization of the refrigerant, and is provided in an air conditioning case 17 disposed on the back side of the air conditioner operation panel 13. And in the air-conditioning case 17, the air taken in from the vehicle interior or the exterior of the vehicle is blown toward the evaporator 15 by an electric blower (not shown), so that the air cooled by the evaporator 15 is sent out into the vehicle interior. . Further, in the air conditioning case 17, an air mix door (not shown) is disposed on the downstream side of the evaporator 15, and the air is heated on the downstream side of the air mix door using hot water of the engine 4 as a heat source. A heater core (not shown) is disposed. The air mix door has a function of adjusting the temperature of the air blown into the passenger compartment, and adjusts the ratio of the warm air from the heater core and the air flowing directly from the evaporator 15.

  A post-evaporator sensor 8 that detects the temperature of the cooling air blown by the electric blower is provided on the downstream side of the evaporator 15. The temperature information detected by the post-evaporator sensor 8 is transmitted to the air conditioner ECU 10 and used to adjust the cooling capacity of the evaporator 15.

  The post-evaporator sensor 8 is usually provided for the function of preventing frost formation. When the cooling capacity wins the cooling load, the refrigerant evaporation pressure decreases, the surface temperature of the evaporator 15 becomes 0 ° C. or less, the freezing of condensed water progresses and the flow of the passing air is prevented, the evaporation pressure further decreases, Air will stop flowing. In order to prevent such a state, the function which controls the cooling capability of the refrigerating-cycle apparatus 9 and prevents frost formation is required. As a method for providing this function, the air temperature downstream of the evaporator 15 is measured by the post-evaporator sensor 8, and the electromagnetic clutch 7 is turned off at a certain temperature, for example, 4 ° C. Control to put. The post-evaporator sensor 8 of the present embodiment has a function of detecting the temperature of the blown air during cooling in addition to the function of detecting the air temperature downstream of the evaporator 15 to prevent frost formation.

  The air conditioner operation panel 13 is disposed at the center of the instrument panel. The air conditioner operation panel 30 has a display unit for displaying the room temperature set by the passenger, and an air conditioner switch 14 for turning on and off the air conditioner. And a suction mode switching switch for switching between the inside air mode and the outside air mode, a blow mode switching dial, an air volume setting dial, and an indoor temperature setting dial.

  The indoor temperature setting dial has a cylindrical shape that protrudes toward the occupant side, and is configured to allow the occupant to freely set the indoor temperature setting by rotating a knob formed on the side of the cylinder. The set temperature can be set low, and the set temperature can be set high by turning clockwise.

  The air conditioner ECU 10 has a built-in microcomputer (not shown) in which a control program related to air conditioning control, an arithmetic expression, and the like are stored, and detects a signal output by operating the air conditioner operation panel 13 and the temperature of inside air and / or outside air. Based on the signals output from the sensor group 21 such as the inside / outside air detection sensor, the solar radiation sensor, and the engine water temperature sensor, and the signals output from the post-evaporator sensor 8 or the humidity sensor, The air switch door, the air mix door, the electromagnetic clutch 7, the electric blower, the circulation pump 19 described later, and the engine ECU 1 are controlled.

  The engine ECU 1 controls the engine 4 based on a sensor group 22 that detects the operating state of the engine 4 such as a rotation speed signal, a vehicle speed signal, and a brake signal, and transmits the operating state of the engine 4 to the air conditioner ECU 10. The engine ECU 1 and the air conditioner ECU 10 may be integrated as a single control device.

  In the vehicle according to the present embodiment, when the stop state is detected based on the engine speed signal, the vehicle speed signal, the brake signal, etc., the engine ECU 1 shuts off the power to the ignition device, stops the fuel injection, etc. 4 automatically stops. Then, after the engine 4 is stopped, when the vehicle is shifted to a state in which the vehicle is started by the driver's driving operation, the engine ECU 1 recognizes the start state based on an accelerator signal or the like and starts the engine 4.

  Next, a cold storage liquid medium supply unit as a configuration for performing cold storage and cooling, which is a characteristic part of the present embodiment, will be described. This cold storage liquid medium supply means has collected at least a structure for supplying the cold storage liquid medium to the heat transfer surface of the evaporator 15 and a structure for collecting the cold storage liquid medium that has flowed down the heat transfer surface of the evaporator 15. It consists of the structure which conveys a cool storage liquid medium. The cold storage liquid medium of the present invention may be a medium that can transport and transmit cold heat. For example, the cold storage liquid medium is a medium that can diffuse into the surface of the evaporator 15 such as water, ethylene glycol, or a surfactant to form a liquid film state. . In the present embodiment, considering the fact that the system configuration can be further simplified, a case where water is used will be described below.

  As shown in FIG. 1, on the upstream side of the evaporator 15, spraying means 20 is provided as a configuration for supplying a cold storage liquid medium to the heat transfer surface 16 of the evaporator 15. The spray means 20 is provided in the air conditioning case 17 and has a plurality of spray ports 24 at its tip, and is configured to be sprayable from a plurality of locations in the flow-down direction with respect to the heat transfer surface 16. The water supplied in the form of a mist to the heat transfer surface 16 of the evaporator 15 by the spraying means 20 flows down the heat transfer surface 16 and is collected in a recess 18 formed below the evaporator 15. And the water collected in the recessed part 18 is collected in the tank 23 for a liquid reservoir. The water in the tank 23 is sent to the spray means 20 by the circulation pump 19 configured to convey the collected water, and is supplied to the heat transfer surface 16 again. The circulation pump 19 is provided in the tank 23, and its suction part is submerged in the tank 23. With such a configuration, the cold storage liquid medium repeatedly flows through the circulation path while performing cold storage and cooling.

  In the vehicle air conditioner of the present embodiment, the cold storage mode and the cool-down mode can occur by the operation of the idling stop function. FIG. 2 is a chart showing the operation of the vehicle, the compressor 3 and the circulation pump 19 when the idling stop function is operated.

  The air conditioner ECU 10 starts the supply of the cold storage liquid medium by the cold storage liquid medium supply means when the air conditioner switch 14 is turned on by the operation of the air conditioner switch 14 by the passenger, and then the cold storage liquid medium until the air conditioner switch 14 is turned off. Control to continue the supply. When the vehicle speed is not zero, the engine 4 is in an operating state, the compressor 3 is also operated, and the refrigeration cycle apparatus 9 is in an operating state. In this case, it is a cold storage mode, the low-temperature refrigerant evaporates in the evaporator 15, cools the air flowing around the heat transfer surface 16 (in the direction of the arrow in FIG. 1), and further the circulation pump 19. The water accumulated in the tank 16 by the operation is sent to the spray means 20 and sprayed in the form of a mist from the spray port 24 toward the heat transfer surface 16. The jetted water comes into contact with the surface of the heat transfer surface 16 so as to form a liquid film. At this time, cold heat generated by evaporation of the low-temperature refrigerant flows around the heat transfer surface 16 (in the direction of the arrow in FIG. 1). ) As well as water, which is a cold storage medium.

  On the other hand, when the vehicle speed becomes zero, the engine 4 stops, and the operation of the compressor 3 stops accordingly. When the compressor 3 is in a stopped state, the refrigeration cycle device 9 is also not operating, so that the refrigerant does not evaporate in the evaporator 15, so the air cannot be cooled by the refrigerant. Then, the air is cooled by the cold heat stored in the cold storage liquid medium, and the mode is switched to a cooling mode in which cooling air is blown into the vehicle interior. In the cooling mode, while the air conditioner switch 14 is in the ON state, the cold storage liquid medium (water) supplied so as to continuously flow on the heat transfer surface 16 is in direct contact with the ambient air around the heat transfer surface 16 to generate heat. In this mode, the ambient air is cooled by exchanging and storing the stored cold heat to the ambient air, and the cooled air is blown into the passenger compartment by the electric blower. According to such a cooling mode, even when the compressor 3 is stopped, cooling can be supplied to the passenger compartment to reduce passenger discomfort.

  As described above, the cold storage mode with the movement of the cold energy by the cold storage liquid medium supply means and the cooling mode are repeatedly performed so as to be interlocked with the stop and operation of the engine 4 by the idling stop function. Without requiring a dedicated heat storage heat exchanger, the cold storage means and the cooling means can be simplified.

  FIG. 3 is a schematic view showing the configuration of another cold storage liquid medium supply unit of the present embodiment. The structure of the path | route through which a cool storage liquid medium (water) circulates is demonstrated using FIG. On the upstream side of the evaporator 15, there is provided spraying means 24 configured to supply a cold storage liquid medium to the heat transfer surface 16 of the evaporator 15. The spraying port 30 is provided, and water is sprayed downward from the evaporator 15 in the vertical direction with respect to the heat transfer surface 16. The water flowing down the heat transfer surface 16 of the evaporator 15 by this spraying means 29 flows down the heat transfer surface 16 and is collected in a recess 18 formed below the evaporator 15. Then, the water collected in the recess 18 flows in the pipe 28 communicating with the recess 18 and is collected in the tank 31 for reservoir. Water in the tank 31 is sucked from a suction portion of a circulation pump 19 provided in the tank 31, connected to the discharge port of the circulation pump 19, and sprayed through a pipe 26 communicating with the spraying means 29. It is sent to the means 29 and supplied to the heat transfer surface 16 from the spray port 30 again. The circulation pump 19 is disposed in the flow path 25 through which the cold storage liquid medium (water) circulates, and the suction portion thereof is disposed in the tank 23. The flow path 25 indicates a path that moves and circulates in the order of the spray means 29, the recess 18, the pipe 28, and the pipe 26. Further, by using water as the cold storage liquid medium, the condensed water adhering to the evaporator 15 during the air-conditioner cooling mode can be used as the cold storage liquid medium. In this case, since the condensed water is obtained from the moisture contained in the room air or the like, the amount of water flowing through the circulating flow path 25 is increased. Water can be discharged outside the vehicle. With such a configuration, the cold storage liquid medium is stored cold by taking cold heat from the refrigerant flowing through the evaporator 15, and is cooled by moving the stored cold heat to blown air and blowing it into the passenger compartment as cooling air (in the direction of the arrow in FIG. 3). Are repeatedly flowing through the circulating flow path 25 while being alternately repeated.

  Thus, according to the vehicle air conditioner of the present embodiment, the compressor 3 that pumps the refrigerant, the radiator 2 that radiates the pumped refrigerant, and the decompressor 5 that depressurizes the refrigerant from the radiator 2 side. A refrigerating cycle device 9 having at least an evaporator 15 that evaporates the decompressed refrigerant and cools the air that is blown into the vehicle interior, and contacts the heat transfer surface 16 of the evaporator 15 with the cold storage liquid medium (water) Since it is set as the structure provided with the cool storage liquid medium supply means supplied so that it may be made, a heat storage / cooling means can be comprised by the simplified structure. Also, when the engine is operating, cold energy is stored in the cold storage liquid medium (water), and when the engine is stopped, the stored cold heat is transferred to the blown air via the cold storage liquid medium (water) and supplied as cooling air into the vehicle. Can do.

  Further, when the cool storage liquid medium supply means includes spraying means 20 and 29 for spraying the cool storage liquid medium to the evaporator 15, the cool storage liquid medium (water) is sprayed by the spraying means 20 and 29. Thereby, since it becomes easy to form a thin liquid film on the heat transfer surface 16 of the evaporator 15, it is possible to improve the cold storage efficiency and to improve the cooling efficiency to the air.

  Further, when the spray means 20 and 29 are configured to spray the cold storage liquid medium (water) toward the upper part or the upper part of the evaporator 15, a liquid film is formed from the upper part to the lower part of the heat transfer surface 16 of the evaporator 15. Therefore, efficient cold storage and cooling can be performed using a large heat storage / cooling effective area.

  Further, when the mist means 20 is configured to spray toward the evaporator 15 toward a plurality of locations, the heat storage / cooling effective area can be increased by the configuration of spraying toward the evaporator 15 toward the plurality of locations. Efficient cold storage and cooling can be performed.

  Further, when the spraying means 20 is configured to spray toward the evaporator 15 so as to expand in a direction substantially perpendicular to the blowing direction of the blown air, the heat transfer area of the evaporator 15 is widely used. Efficient cold storage and cooling can be performed. For example, when spraying is performed so as to expand in the vertical direction, the left-right direction, or the diagonal direction with respect to the heat transfer surface of the evaporator 15, it is the most suitable for the position and shape of the heat transfer surface 16 of the evaporator 15. A liquid film can be formed at a location with good thermal efficiency to perform efficient cold storage and cooling.

  The cold storage liquid medium supply means includes a circulation pump 19 that circulates the cold storage liquid medium (water). In the process of circulation by the circulation pump 19, the cold storage liquid medium (water) is transferred to the heat transfer surface 16 of the evaporator 15. In this configuration, the cold storage liquid medium is circulated in a predetermined flow path, and is supplied to the heat transfer surface 16 of the evaporator 15 in the flow path, thereby preventing interference with other components as much as possible. When the cold storage liquid medium is placed in an irrelevant circulation flow path, the release of cold heat stored in the cold storage liquid medium can be suppressed.

  Further, when the liquid storage tank 23 is provided in the flow path 25 for circulating the cold storage liquid medium (water), by storing the cold storage liquid medium in the tank 23, The regenerative liquid medium having a required flow rate can be taken out and supplied to the heat transfer surface of the evaporator.

  Further, when the circulation pump 19 is provided in the tank 23, the piping for connecting the suction portion of the circulation pump 19 and the tank 23 is unnecessary, the circulation flow path can be shortened, and the apparatus can be It can be downsized.

  Further, below the evaporator 15, a case having a recess 18 is provided in order to catch the flowing cold storage liquid medium, and when the inside of the recess 18 and the suction part of the circulation pump 19 are configured to communicate with each other, The cold storage liquid medium (water) flowing down the heat transfer surface 16 of the evaporator 15 is surely recovered, and the efficiency of cold storage and cooling can be improved.

  In addition, when the air-conditioner switch 14 is in the on state, when the supply of the cold storage liquid medium by the cold storage liquid medium supply means is continued, the user wants to operate the air conditioner (the switch is in the on state). In this case, the cold storage liquid medium (water) continues to be supplied to the heat transfer surface 16 of the evaporator 15, and when the engine is operated with the air conditioner switch 14 turned on, cold heat is always stored in the cold storage liquid medium. When the engine is stopped in the state of entering 14, the stored cold heat is moved to the blown air and supplied as cooling air into the vehicle, so that a vehicle air conditioner that can efficiently supply the cold storage liquid medium can be obtained.

  When water is used as the cold storage liquid medium, the condensed water adhering to the evaporator 15 during operation of the refrigeration cycle apparatus 9 is collected by bringing water into contact with the heat transfer surface 16 of the evaporator 15 as the cold storage liquid medium. The drain water can be used as a cold storage medium. Further, there is an effect that it is easy to form a film shape on the heat transfer surface 16.

(Second Embodiment)
The second embodiment is different from the first embodiment only in the spraying means 33, and the other structures are the same as those in the first embodiment, and the description thereof will be omitted. The spraying means 33 will be described. FIG. 4 is a perspective view showing the configuration of the spray means of the vehicle air conditioner in the present embodiment.

  As shown in FIG. 4, the spray means 33 has a pipe that conveys the cold storage liquid medium (water) delivered from the circulation pump 19 to the height above the evaporator 15, and the height near the top of the evaporator 15. 4, and a plurality of jet ports 32 arranged in a lateral width direction that is substantially perpendicular to the blowing direction of the blown air (the direction of the arrow in FIG. 4) and blows air from the evaporator 15. Arranged upstream in the direction. In other words, the pipe has a rake shape, and has a spout 32 at the branched tip. The cold storage liquid medium (water) sent out from the circulation pump 19 flows upward in the pipe, and is sprayed from the plurality of jet ports 32 toward the heat transfer surface 16 in a mist form. The jetted water adheres to the heat transfer surface 16 and flows down over a wide range in the lateral width direction of the evaporator 15, and the movement of cold heat is improved in the cold storage mode and the cool-down mode. Further, it is desirable to adjust the injection amount so that a thin liquid film is formed on the heat transfer surface 16 and flows downward vertically. This is because the cold storage efficiency and the cooling efficiency can be improved.

  Thus, according to the vehicle air conditioner of the present embodiment, the spraying means 33 sprays toward the evaporator 15 so as to expand in the lateral width direction substantially perpendicular to the blowing direction of the blown air. Therefore, efficient cold storage and cooling using the heat transfer area of the evaporator 15 can be performed.

(Third embodiment)
The third embodiment is different from the first embodiment only in the spraying means 34, and other configurations are the same as those in the first embodiment, and the description thereof is omitted, and the spraying means 34 will be described. FIG. 5 is a schematic diagram showing the configuration of the spray means of the vehicle air conditioner in the present embodiment, and FIG. 6 is a schematic diagram showing the detailed configuration of the spray ports in the spray means.

  As shown in FIG. 5, the spray means 34 is arranged on the upstream side in the blowing direction from the evaporator 15, and has three pipes 36 arranged from the upper part of the evaporator 15 to the vicinity of the middle part. The pipe 36 is disposed so that the cold storage liquid medium (water) can be sprayed to the boundary portion between the header tank 35 and the heat transfer surface 16 provided in the upper portion of the evaporator 15. The three pipes 36 are extended in the lateral width direction (depth direction of FIG. 5) of the evaporator 15 in a direction substantially perpendicular to the blowing direction of the blown air (direction of the arrow in FIG. 5). Each of these pipes 36 has a plurality of outlets 37, and a plurality of small-diameter outlets as shown in FIG. 6 are arranged in series in the longitudinal direction of the pipe 36, that is, in the lateral width direction of the evaporator 15. The configuration. Moreover, although the jet nozzle 37 in FIG. 6 is a circular opening, if the opening area is small and the water flowing in the pipe 36 can be supplied to the heat transfer surface 16 in the form of a mist, It is not limited to a circular opening, and may be, for example, a slit shape or a narrow strip shape.

  These pipes 36 are connected to the discharge port of the circulation pump 19 that is a means for conveying the cold storage liquid medium (water), and the cold storage liquid medium (water) fed from the circulation pump 19 passes through the pipe 36. It will be injected toward the heat transfer surface 16 from the plurality of injection ports 37. Since the sprayed water adheres to the heat transfer surface 16 and flows down over a wide range in the width direction of the evaporator 15, the water sprayed from the pipes 36 arranged in a plurality of stages in the vertical direction of the evaporator 15. By doing so, the heat transfer surface is surely wetted in the lower part of the evaporator 15, so that the movement of the cold is improved in the cold storage mode and the cool-down mode. Further, it is desirable to adjust the injection amount so that a thin liquid film is formed on the heat transfer surface 16 and flows downward vertically. This is because the cold storage efficiency and the cooling efficiency can be improved.

  Thus, according to the vehicle air conditioner of the present embodiment, the spraying means 34 sprays toward the evaporator 15 so as to expand in the vertical direction in a direction substantially perpendicular to the blowing direction of the blown air. Therefore, efficient cold storage and cooling using the heat transfer area of the evaporator 15 can be performed.

  Further, the spraying means 34 is in a direction substantially perpendicular to the blowing direction of the blown air, and is configured to spray toward the evaporator 15 so as to expand in the vertical direction and the lateral width direction with respect to the evaporator 15. In addition, it is possible to perform efficient cold storage and cooling using a wide heat transfer area of the evaporator 15.

(Other embodiments)
In the first and second embodiments, the expansion valve 5 is used as the decompressor of the refrigeration cycle apparatus 9, but an ejector may be used instead. The ejector has a nozzle part that decompresses and expands the high-pressure side refrigerant, and a pressure raising part that increases the pressure of the refrigerant by mixing the refrigerant injected from the nozzle part and the gas-phase refrigerant sucked from the evaporator 15. Thus, the power of the compressor 3 can be reduced.

  Moreover, in the said 1st and 2nd embodiment, although the compression-type refrigerating-cycle apparatus was mentioned as an example and demonstrated, what is necessary is just to have a low-temperature heat exchanger for heat-exchanging with room air. The machine may be an absorption type.

  Moreover, in the said 1st and 2nd embodiment, although the spraying means is used as a means to supply the cool storage liquid medium to the evaporator 15 by a cool storage liquid medium supply means, this showed an example of the supply method. However, as long as the cold storage liquid medium can store and cool, it does not mean that the supply method is limited to spraying. As another method, it is also possible to supply a small amount of the cold storage liquid medium in a shower form, or to supply the cold storage liquid medium in a curtain form to the heat transfer surface 16.

It is a schematic diagram which shows the structure of the vehicle air conditioner of 1st Embodiment. In the vehicle air conditioner of 1st Embodiment, it is the chart figure which showed the action | operation of the vehicle, the compressor, and the circulation pump at the time of idling stop function action | operation. It is the schematic which showed the structure of the other cold storage liquid medium supply means in the vehicle air conditioner of 1st Embodiment. It is the perspective view which showed the structure of the spraying means of the vehicle air conditioner in 2nd Embodiment. It is the schematic which showed the structure of the spraying means of the vehicle air conditioner in 3rd Embodiment. It is the schematic which showed the detailed structure of the spray outlet in the spray means of the vehicle air conditioner of 3rd Embodiment.

Explanation of symbols

3 Compressor 5 Expansion valve (pressure reducer)
9 Refrigerating cycle equipment 14 Air conditioner switch 10 Air conditioner ECU
DESCRIPTION OF SYMBOLS 15 Evaporator 16 Heat-transfer surface 18 Recessed part 19 Circulation pump 20, 29 Spray means 23 Tank 25 Flow path 33, 34, 36 Spray means

Claims (11)

A compressor (3) that pumps the refrigerant, a radiator (2) that radiates the pumped refrigerant, a decompressor (5) that decompresses the refrigerant from the radiator side, and evaporates the decompressed refrigerant An air conditioner for a vehicle comprising a refrigeration cycle device (9) having at least an evaporator (15) for cooling air to be blown into the vehicle interior,
A vehicle air conditioner comprising a cold storage liquid medium supply means for supplying a cold storage liquid medium so as to contact the heat transfer surface (16) of the evaporator (15).   The said cold storage liquid medium supply means includes the spraying means (20, 29, 33, 34, 36) for spraying the cold storage liquid medium to the evaporator (15). Vehicle air conditioner.   The vehicle air conditioner according to claim 2, wherein the spraying means (20, 29, 33, 34) sprays the cold storage liquid medium toward an upper part or an upper part of the evaporator (15).   The vehicular air conditioner according to claim 2 or 3, wherein the spraying means (20, 33, 34, 36) sprays the evaporator (15) toward a plurality of locations.   The spraying means (20, 33, 34, 36) sprays toward the evaporator (15) so as to expand in a direction substantially perpendicular to a blowing direction of the blown air. The vehicle air conditioner according to 2, 3, or 4.   The cold storage liquid medium supply means includes a circulation pump (19) for circulating the cold storage liquid medium, and in the process of circulation by the circulation pump (19), the cold storage liquid medium is transmitted to the evaporator (15). The vehicle air conditioner according to any one of claims 1 to 5, wherein the air conditioner is supplied to a hot surface (16).   The vehicle air conditioner according to claim 6, wherein a liquid storage tank (23) is provided in a flow path (25) for circulating the cold storage liquid medium.   The vehicle air conditioner according to claim 7, wherein the circulation pump (19) is provided in the tank (23).   Below the evaporator (15), a case having a recess (18) is provided for receiving the cold storage liquid medium flowing down, and the inside of the recess (18) and the suction portion of the circulation pump (19) are provided. The vehicle air conditioner according to claim 6, 7 or 8, wherein the vehicle air conditioner is configured to communicate with each other.   The vehicle air conditioner according to any one of claims 1 to 8, wherein supply of the cold storage liquid medium by the cold storage liquid medium supply means is continued while the air conditioner switch (14) is turned on.   The vehicle air conditioner according to any one of claims 1 to 10, wherein water is used as the cold storage liquid medium.

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