JP2021079843A - Vehicular air conditioner - Google Patents

Abstract

To provide a vehicular air conditioner capable of suppressing vibration transmission between a cooler and an air conditioning case.SOLUTION: A vehicular air conditioner comprises: an air conditioning case 21 in which ventilation air to be fed into a cabin flows; and a cooler 41 having a core part 42, an upper tank 43, and a lower tank 44. The vehicular air conditioner comprises: an expansion valve 49 connected to the upper tank; an upper part supporting part supporting the upper tank; and a lower part supporting part supporting the lower tank. The vehicular air conditioner comprises: an upper part cushioning material 73 interposed between the upper tank and the upper part support part; a lower part cushioning material 74 interposed between the lower tank and the lower part support part; and a cover member 51 covering a front surface, a bottom surface, and a rear surface of the lower tank. The lower part cushioning material in a state of being interposed between the lower tank and the lower part support part is a cushioning material that is less compressible than the upper part cushioning material as interposed between the upper tank and the upper part support part.SELECTED DRAWING: Figure 2

Description

The disclosure herein relates to vehicle air conditioners.

Patent Document 1 discloses an evaporator having a packing in which the outer elastic layer is formed of a material softer than the inner elastic layer. This prevents the vibration generated by the evaporator from being transmitted through the holding portion of the air conditioning system. The contents of the prior art document are incorporated by reference as an explanation of the technical elements in this specification.

Japanese Unexamined Patent Publication No. 2016-205664

In the configuration of the prior art document, the transmission of vibration to the driver's seat via the holding portion of the air conditioning system is suppressed by keeping only the minimum part of the evaporator pressed by the positioning rib. Therefore, if the posture of the evaporator cannot be maintained in the optimum state, the effect of suppressing vibration transmission by the packing may be reduced. In particular, since a refrigerant pipe for flowing a refrigerant is connected to the evaporator, an unintended external force may be applied through the refrigerant pipe. If the posture of the evaporator deviates from the proper state due to this external force, the compressed state of the packing changes, and the packing in the state of being compressed more strongly than the proper state reduces the effect of suppressing vibration transmission. Become. Further improvements are required in vehicle air conditioners in the above aspects, or in other aspects not mentioned.

One object disclosed is to provide a vehicle air conditioner that suppresses vibration transmission between a cooler and an air conditioner case.

The vehicle air conditioner disclosed here includes an air conditioner case (21) through which blown air blown into the vehicle interior flows, and a core portion (42) and an upper tank (43) installed inside the air conditioner case. A cooler (41) having a lower tank (44), an expansion valve (49) connected to the upper tank, an upper support portion (63) provided in the air conditioning case and supporting the upper tank, and the like. The lower support portion (64) provided in the air conditioning case and supporting the lower tank, the upper cushioning material (73, 273) interposed between the upper tank and the upper support portion, and the lower tank and the lower support. A lower cushioning material (74) interposed between the portions and a cover member (51) provided between the lower tank and the lower cushioning material and covering the front surface, the bottom surface, and the rear surface of the lower tank are provided. The lower cushioning material interposed between the lower tank and the lower support portion is a cushioning material that is less likely to be compressed than the upper cushioning material interposed between the upper tank and the upper support portion.

According to the disclosed vehicle air conditioner, the lower cushioning material in the state of being interposed between the lower tank and the lower support portion is the upper cushioning material in the state of being interposed between the upper tank and the upper support portion. It is a cushioning material that is less likely to be compressed. Therefore, while suppressing the vibration transmission between the upper tank and the upper support portion via the upper cushioning material, the cooler is supported by the support between the lower tank and the lower support portion via the lower cushioning material. Can be stably supported. Therefore, it is possible to provide a vehicle air conditioner that suppresses vibration transmission between the cooler and the air conditioner case.

The disclosed aspects herein employ different technical means to achieve their respective objectives. The claims and the reference numerals in parentheses described in this section exemplify the correspondence with the parts of the embodiments described later, and are not intended to limit the technical scope. The objectives, features, and effects disclosed herein will be made clearer by reference to the subsequent detailed description and accompanying drawings.

It is a block diagram which shows the schematic structure of the air conditioner for a vehicle. It is sectional drawing which shows the peripheral structure of a cooler. It is a perspective view of a cover member. It is sectional drawing which shows the peripheral structure of the upper packing. It is sectional drawing which shows the peripheral structure of the lower packing. It is sectional drawing which shows the peripheral structure of the upper packing in 2nd Embodiment.

A plurality of embodiments will be described with reference to the drawings. In a plurality of embodiments, functionally and / or structurally corresponding parts and / or related parts may be designated with the same reference code or reference codes having a hundreds or more different digits. References can be made to the description of other embodiments for the corresponding and / or associated parts.

The first embodiment vehicle air conditioner 1 is an air conditioner mounted on a vehicle. The vehicle is, for example, an automobile equipped with a gasoline-powered engine. However, as the vehicle, an electric vehicle equipped with a traveling motor, a hybrid vehicle equipped with both an engine and a motor, and the like can also be adopted. The vehicle air conditioner 1 is a device that adjusts the temperature and humidity of the taken-in air and blows it out into the vehicle interior. In other words, the vehicle air conditioner 1 is a device that performs air conditioning operations such as heating operation, cooling operation, and dehumidifying operation in the vehicle interior.

In FIG. 1, the vehicle air conditioner 1 includes a blower unit 10 for blowing air and an air conditioner unit 20 for adjusting the air temperature. The blower unit 10 includes a blower case 11 and a blower 15. The blower case 11 includes two inlets, an inside air inlet 14a and an outside air inlet 14b. Inside the blower case 11, an inside / outside air switching door 12 for switching the opening / closing of the inside air introduction port 14a and the outside air introduction port 14b is provided. The inside / outside air switching door 12 can execute the inside air circulation mode, which is a mode in which the conditioned air circulates in the room. The inside / outside air switching door 12 can execute the outside air introduction mode, which is a mode in which the air conditioning air is introduced from the outside.

The blower 15 is provided inside the blower case 11. The blower 15 is an electric blower whose rotation speed can be controlled by using an electric motor. The blower 15 is a device for sending the air taken in from the introduction port from the blower unit 10 toward the air conditioning unit 20. The blower 15 is, for example, a centrifugal blower, and a sirocco fan or a turbo fan can be adopted.

The air conditioning unit 20 includes an air conditioning case 21, a heater device 32, and a cooler 41. The heater device 32 is a device for heating air in the air conditioning operation. The heater device 32 is a heater core in which high-temperature engine cooling water circulates inside. However, the heater device 32 may be configured by an electric heater that can electrically control the magnitude of the output as well as the on / off control of the output.

The cooler 41 is a device for evaporating the liquid phase refrigerant into the gas phase refrigerant. The cooler 41 is a heat exchanger that takes heat from the surroundings when evaporating the refrigerant. In other words, the cooler 41 is a cooling heat exchanger for cooling the air in the air conditioning operation. Inside the air conditioning case 21, the cooler 41 is provided located upstream of the air flow from the heater device 32. In the cooler 41, vibration such as a refrigerant passing sound may occur in the process of passing the refrigerant. In other words, the cooler 41 is a vibration source that can generate vibration during the air conditioning operation.

The air conditioning case 21 includes three openings, a defroster opening 24a, a face opening 24b, and a foot opening 24c. The defroster opening 24a is an opening through which air conditioning air flows toward the front window. The face opening 24b is an opening through which air-conditioning air flows toward the upper body including the occupant's face. The foot opening 24c is an opening through which air-conditioning air flows toward the lower body including the feet of the occupant.

An air mix door 25 is provided inside the air conditioning case 21. The air mix door 25 is a door that adjusts the ratio of air that has passed through the cooler 41 to the heater device 32. Inside the air conditioning case 21, a defroster door 22a, a face door 22b, and a foot door 22c are provided. The defroster door 22a is a door that controls the opening and closing of the defroster opening 24a. The face door 22b is a door that controls the opening and closing of the face opening 24b. The foot door 22c is a door that controls the opening and closing of the foot opening 24c.

In the vehicle air conditioner 1, it is required to make the vehicle interior a comfortable environment by air conditioning operation. However, if loud noise or the like is generated during the air-conditioning operation, the comfort inside the vehicle interior will be impaired. Therefore, the vehicle air conditioner 1 is required to have a high degree of quietness. For example, when vibration occurs in the cooler 41 when the refrigerant passes through, the vibration generated in the cooler 41 may be transmitted to the air conditioning case 21 and transmitted to the vehicle interior as an abnormal sound from the face opening 24b or the like. When such an abnormal noise is perceived by the occupant, the comfort in the passenger compartment is reduced. Therefore, a configuration for suppressing abnormal noise is required around the cooler 41.

In FIG. 2, the cooler 41 includes a core portion 42, an upper tank 43, and a lower tank 44. The cooler 41 is configured such that a plurality of refrigerant flow paths are arranged in parallel in the core portion 42. In the cooler 41, the upper tank 43 and the lower tank 44 function as inlets or outlets for flowing the refrigerant through the core portion 42. The cooler 41 has a configuration called a multi-flow heat exchanger. The blown air flows through the core portion 42 from the front surface to the rear surface. Therefore, the leeward side of the cooler 41 corresponds to the front and the leeward side corresponds to the rear.

An upper packing 73 is provided between the upper tank 43 and the air conditioner case 21. The upper packing 73 is provided so as to face the three surfaces of the front surface, the upper surface, and the rear surface of the upper tank 43. The upper packing 73 is attached and fixed to the upper tank 43. The upper packing 73 provides an example of an upper cushioning material.

The upper packing 73 fills the space between the upper tank 43 and the air conditioner case 21 to prevent the blown air from flowing between the upper tank 43 and the air conditioner case 21. In other words, the upper packing 73 is a component that provides a wind leakage prevention function that controls the flow of the blown air so that the blown air flows through the core portion 42.

The upper packing 73 is arranged between the upper tank 43 and the air conditioner case 21 in a partially compressed state. As a result, the position of the cooler 41 is suppressed from being displaced in the front-rear direction or the upward direction. In other words, the upper packing 73 is a component that provides a fixing function for fixing the cooler 41 so that it can maintain an appropriate position. Further, the upper packing 73 is made of a polymer material that is softer than the resin air-conditioning case 21 and the metal cooler 41. The upper packing 73 is a component that provides a vibration transmission suppressing function that suppresses vibration transmission between the cooler 41 and the air conditioning case 21.

A cover member 51 is provided around the lower tank 44. The cover member 51 covers the front surface, the lower surface surface, and the rear surface of the lower tank 44. The cover member 51 is a plate-shaped part having a C-shaped cross section. The cover member 51 includes a curved surface portion that follows the curved surface shape of the lower tank 44. When the cover member 51 is properly mounted, the lower tank 44 is sandwiched by the cover member 51 in the front-rear direction.

In FIG. 3, the cover member 51 includes a drain hole portion 52 and a drainage rib 53. When the cooler 41 cools the air containing water, water may condense on the outer surface of the cooler 41. When the condensed water adheres to the outer surface of the cooler 41, it hinders heat exchange between the cooler 41 and the surrounding air. Therefore, in the cooler 41, it is necessary to quickly remove the generated condensed water.

The drain hole 52 is a hole for passing water from above to below the cover member 51. A plurality of drain holes 52 are provided in the cover member 51. The drain hole portion 52 includes a hole portion provided from the front surface to the lower surface of the cover member 51 and a hole portion provided from the rear surface to the lower surface of the cover member 51. However, the shape of the drain hole portion 52 is not limited to the above-mentioned shape. For example, a rectangular hole may be provided along the longitudinal direction of the cover member 51. The position where the drain hole portion 52 is provided preferably includes a portion located at the lowermost position when the cooler 41 equipped with the cover member 51 is installed in the air conditioning case 21. As a result, it is possible to prevent water from accumulating on the cover member 51 and not being drained.

The drainage rib 53 is a rib for promoting drainage of water accumulated on the outer surface of the lower tank 44. The drainage rib 53 extends in the vertical direction, and a plurality of the ribs 53 are provided in parallel. The drainage rib 53 is provided on the inner side surface of the cover member 51. When the drainage rib 53 comes into contact with the outer surface of the lower tank 44, a gap corresponding to the amount of protrusion of the drainage rib 53 is formed between the outer surface of the lower tank 44 and the inner surface of the cover member 51. Water will flow from top to bottom through this gap. Here, by appropriately adjusting the size of the gap, water can be smoothly guided from top to bottom and drained by utilizing the capillary phenomenon.

In FIG. 2, a lower packing 74 is provided between the cover member 51 and the air conditioner case 21. The lower packing 74 includes a leeward lower packing 74u and a leeward lower packing 74d. The windward lower packing 74u is provided so as to face the front surface and the lower surface of the cover member 51. The leeward lower packing 74d is provided so as to face the rear surface of the cover member 51. The leeward lower packing 74u and the leeward lower packing 74d are attached to the cover member 51. A gap is formed between the leeward lower packing 74u and the leeward lower packing 74d. As a result, the condensed water generated on the outer surface of the cooler 41 can flow below the lower packing 74. The lower packing 74 provides an example of a lower cushioning material. The windward lower packing 74u provides an example of a front lower cushioning material. The leeward lower packing 74d provides an example of a rear lower cushioning material.

The lower packing 74 fills the space between the lower tank 44 and the air conditioner case 21 to prevent the blown air from flowing between the lower tank 44 and the air conditioner case 21. In other words, the lower packing 74 is a component that provides a wind leakage prevention function that controls the flow of the blown air so that the blown air flows through the core portion 42.

The lower packing 74 is arranged between the lower tank 44 and the air conditioner case 21 in a partially compressed state. As a result, the position of the cooler 41 is suppressed from being displaced in the front-rear direction or the downward direction. In other words, the lower packing 74 is a component that provides a fixing function for fixing the cooler 41 so that it can maintain an appropriate position. Further, the lower packing 74 is made of a polymer material that is softer than the resin air-conditioning case 21 and the metal cooler 41. The lower packing 74 is a component that provides a vibration transmission suppressing function that suppresses vibration transmission between the cooler 41 and the air conditioning case 21.

An expansion valve 49 is connected to the upper tank 43. The expansion valve 49 is a valve device that expands the refrigerant immediately before flowing into the cooler 41. By expanding the refrigerant, the temperature of the refrigerant is lowered and the liquid phase is easily evaporated to the gas phase. The expansion valve 49 is a device for reducing the pressure of the refrigerant, and is also called a pressure reducing device.

The cooler 41 is fixed to the air conditioning case 21 in a state of being slightly tilted forward from the vertical direction. The cooler 41 may receive an external force at a connection point with the expansion valve 49 by being pulled by the expansion valve 49 or pressed against the expansion valve 49. Due to this external force, the position of the cooler 41 may be slightly deviated from the optimum position. If the upper tank 43 is pulled forward by the expansion valve 49, the cooler 41 tends to rotate slightly in the direction approaching the expansion valve 49. As a result, the upper packing 73 is in a state in which the windward side corresponding to the front is excessively compressed as compared with the optimum state. Further, the lower packing 74 is in a state in which the leeward lower packing 74d located at the rear is excessively compressed as compared with the optimum state.

In FIG. 4, the air conditioning case 21 includes an upper support portion 63 for supporting the cooler 41. The upper support portion 63 includes a leeward upper support portion 63u and a leeward upper support portion 63d. The windward upper support portion 63u is a rib extending rearwardly and downwardly from the air conditioning case 21. Therefore, the windward upper support portion 63u suppresses the position of the cooler 41 from shifting forward and upward. A plurality of windward upper support portions 63u are provided side by side at predetermined intervals in the left-right direction. The leeward upper support portion 63d is a rib extending forward and downward from the air conditioning case 21. Therefore, the leeward side upper support portion 63d suppresses the position of the cooler 41 from shifting backward and upward. A plurality of leeward upper support portions 63d are provided side by side at predetermined intervals in the left-right direction.

The upper packing 73 is a two-layer packing including an outer layer packing 73a and an inner layer packing 73b. The outer layer packing 73a is in contact with the upper support portion 63. The inner layer packing 73b is in contact with the upper tank 43. The thickness of the outer layer packing 73a is substantially equal to the thickness of the inner layer packing 73b.

The outer layer packing 73a and the inner layer packing 73b are made of different materials. The outer layer packing 73a is made of a material softer than the inner layer packing 73b. The outer layer packing 73a is made of ether-based urethane foam, and the inner layer packing 73b is made of polyethylene foam. However, the configuration of the outer layer packing 73a and the inner layer packing 73b is not limited to the above configuration. The outer layer packing 73a may be made of a material harder than the inner layer packing 73b. Further, the upper packing 73 may be a single-layer packing of the same material instead of the two-layer packing. Alternatively, the upper packing 73 may be a packing having three or more layers.

The upper packing 73 is deformed by applying a pressing force from the upper support portion 63 and applying a pressing force from the upper tank 43. In other words, the upper packing 73 is sandwiched between the upper support portion 63 and the upper tank 43 and is in a compressed state. In the upper packing 73, the thickness of the uncompressed portion is Tu0. Tu0 is the thickness of the upper packing 73 before compression. The thickness of the most compressed portion of the upper packing 73 is Tu1. In this case, the compressibility of the upper packing 73 is represented by (Tu0-Tu1) / Tu0. If the upper packing 73 is not compressed at all, Tu1 and Tu0 have the same value, and the compression ratio is 0%. If the upper packing 73 is compressed to half the thickness before compression, the compression ratio is 50%.

Of the upper packing 73, the portion protruding from between the upper support portion 63 and the upper tank 43 is not compressed. The more compressed the packing such as the upper packing 73 is, the more the reaction force becomes harder. Therefore, the higher the compression ratio of the packing, the easier it is to transmit vibration, and the lower the vibration transmission suppressing function. Therefore, in the upper packing 73, vibration is easily transmitted in a portion having a high compression ratio sandwiched between the upper support portion 63 and the upper tank 43.

In FIG. 5, an inner packing 59 is provided on the inner surface of the cover member 51 at a position facing a portion between the core portion 42 and the lower tank 44. The inner packing 59 is attached and fixed to the inner side surface of the cover member 51. The inner packing 59 fills the gap between the cooler 41 and the cover member 51.

The air conditioning case 21 includes a lower support portion 64 for supporting the cooler 41. The lower support portion 64 includes a leeward lower support portion 64u and a leeward lower support portion 64d. The windward lower support portion 64u is a rib extending rearwardly and upwardly from the air conditioning case 21. Therefore, the windward lower support portion 64u suppresses the position of the cooler 41 from shifting forward. A plurality of windward lower support portions 64u are provided side by side at predetermined intervals in the left-right direction. The leeward lower support portion 64d is a rib extending forward from the air conditioning case 21. Therefore, the leeward lower support portion 64d suppresses the position of the cooler 41 from shifting backward. A plurality of leeward lower support portions 64d are provided side by side at predetermined intervals in the left-right direction.

The lower packing 74 in a state of being interposed between the lower support portion 64 and the cover member 51 is a packing that is less likely to be compressed than the upper packing 73 in a state of being interposed between the upper support portion 63 and the upper tank 43. Here, the packing that is difficult to be compressed includes a packing made of a hard material having a large reaction force. Further, the packing that is difficult to be compressed includes a packing that is made of the same material and has a high compression ratio.

The lower packing 74 is a single-layer packing made of, for example, polyethylene foam. The upper packing 73 is, for example, a two-layer packing of polyethylene foam and ether urethane foam. Here, the ether-based urethane foam is a soft material having a smaller reaction force than the polyethylene foam. Therefore, the lower packing 74 that does not use ether-based urethane foam is a packing member made of a hard material having a larger reaction force than the upper packing 73 that partially uses ether-based urethane foam. However, the lower packing 74 is not limited to the single-layer packing made of polyethylene foam.

The lower packing 74 includes a leeward lower packing 74u and a leeward lower packing 74d. The windward lower packing 74u is provided so as to face the front surface and the lower surface of the lower tank 44. The leeward lower packing 74d is provided so as to face the rear surface of the lower tank 44. The leeward lower packing 74u and the leeward lower packing 74d are attached and fixed to the cover member 51. A gap is formed between the leeward lower packing 74u and the leeward lower packing 74d in the front-rear direction and the left-right direction. As a result, the condensed water generated on the outer surface of the cooler 41 can flow below the lower packing 74.

The cooler 41 is pressed from both sides in the front-rear direction by the lower packing 74 having the leeward lower packing 74u and the leeward lower packing 74d. Here, the lower packing 74 is in contact with the cover member 51. If the cover member 51 is not provided, the lower packing 74 will come into contact with the lower tank 44. Therefore, by providing the cover member 51, the lower packing 74 can be greatly compressed in the front-rear direction by the thickness of the cover member 51 to increase the compression rate. Therefore, the compression ratio can be adjusted by changing the thickness and shape of the cover member 51. Therefore, the compression rate of the lower packing 74 can be easily adjusted as compared with the case where the shape of the cooler 41 and the shape of the lower support portion 64 of the air conditioning case 21 are changed.

The compressibility of the leeward lower packing 74u and the compressibility of the leeward lower packing 74d are substantially equal values. The compressibility of the lower packing 74 is higher than the compressibility of the upper packing 73. For example, the compressibility of the upper packing 73 is 50%, and the compressibility of the lower packing 74 is 90%. Here, assuming that the upper limit of the compression rate of the upper packing 73 and the lower packing 74 is 95%, the upper packing 73 can further increase the compression rate by 45%, whereas the lower packing 74 increases the compression rate. It can only be increased by 5%. In other words, when the cooler 41 is arranged at an appropriate position in the air conditioning case 21, the lower packing 74 is less likely to be compressed than the upper packing 73.

When the lower packing 74 maintains a high compression ratio, the lower part of the cooler 41 is firmly fixed to the air conditioning case 21 via the lower packing 74. Therefore, the movement and rotation of the entire cooler 41 are suppressed. Therefore, the relative position of the cooler 41 with respect to the air conditioning case 21 is likely to be stably maintained in the entire cooler 41.

According to the above-described embodiment, the lower packing 74 in the state of being interposed between the lower tank 44 and the lower support portion 64 is the upper packing in the state of being interposed between the upper tank 43 and the upper support portion 63. It is a packing that is harder to compress than 73. Therefore, in the cooler 41 whose position is stably maintained by using the cover member 51, it is easy to reduce the vibration transmitted between the air conditioning case 21 and the cooler 41 via the upper packing 73. Therefore, even when an external force such as an external force that pulls the cooler 41 or an external force that pushes the cooler 41 is applied, the position of the cooler 41 is unlikely to shift. Therefore, it is possible to prevent the upper packing 73, which is more easily compressed than the lower packing 74, from being excessively compressed. As described above, it is possible to provide the vehicle air conditioner 1 in which vibration transmission between the cooler 41 and the air conditioner case 21 is suppressed.

The lower packing 74 is made of a material that is harder than the upper packing 73. Therefore, the ease of compression between the upper packing 73 and the lower packing 74 can be adjusted by changing the material. Therefore, the lower packing 74 can be made harder than the upper packing 73 and less likely to be compressed without changing the design of the air conditioning case 21 and the cooler 41.

The lower packing 74 is made of polyethylene foam, and the upper packing 73 is made of ether urethane foam. Therefore, the lower packing 74 can be made harder than the upper packing 73 and is less likely to be compressed.

The lower packing 74 is made of the same material, and the upper packing 73 is made of a plurality of layers having different hardnesses using different kinds of materials. Therefore, the hardness can be finely adjusted by the plurality of layers constituting the upper packing 73. Further, the contribution of the hard material and the soft material to the upper packing 73 can be finely adjusted by changing the thickness of each layer. As described above, it is easy to appropriately adjust the ease of compression of the upper packing 73.

In the upper packing 73, the outer layer packing 73a is made of a soft material such as ether urethane foam, and the inner layer packing 73b is made of a hard material such as polyethylene foam. Therefore, since the hard inner layer packing 73b can be arranged between the cooler 41 and the air conditioning case 21, it is easy to prevent the cooler 41 from being displaced with respect to the air conditioning case 21. Further, since the soft outer layer packing 73a can be arranged between the cooler 41 and the air conditioning case 21, vibrations such as the refrigerant passing sound generated by the cooler 41 are less likely to be transmitted to the air conditioning case 21.

The compression rate of the lower packing 74 in the state of being interposed between the lower tank 44 and the lower support portion 64 is the compressibility of the upper packing 73 in the state of being interposed between the upper tank 43 and the upper support portion 63. Greater than. Therefore, the lower packing 74 is less likely to be compressed than the upper packing 73. Therefore, the cooler 41 can be firmly fixed by using the lower packing 74, and it is possible to prevent the upper packing 73 from being excessively compressed. Further, it is possible to suppress the transmission of large vibrations between the cooler 41 and the air conditioner case 21 via the upper packing 73.

The lower packing 74 includes a leeward lower packing 74u and a leeward lower packing 74d, and presses the cover member 51 so as to sandwich the cover member 51 in the front-rear direction. Therefore, the fixing force of the cooler 41 can be adjusted by adjusting the magnitude of the pressing force applied in the front-rear direction with the lower packing 74. Therefore, it is not necessary to increase the compressibility of the upper packing 73 for the purpose of increasing the fixing force of the cooler 41.

The cover member 51 has a plurality of drain holes 52 for draining water on the outer surface of the cooler 41, and a drain rib 53 for forming a predetermined gap between the cover member 51 and the lower tank 44. And have. Therefore, even when the cover member 51 is attached to the cooler 41, the water on the outer surface of the cooler 41 can be appropriately drained. In other words, the cover member 51 can stably drain the water on the outer surface of the cooler 41 while increasing the fixing force of the cooler 41. By increasing the fixing force of the cooler 41, vibration transmission via the upper packing 73 is suppressed. Further, by improving the drainage performance of the cooler 41, it is possible to maintain a state in which the heat exchange efficiency on the outer surface of the cooler 41 is high. In summary, it is possible to provide a vehicle air conditioner 1 that has both high quietness and high cooling performance.

Second Embodiment This embodiment is a modification based on the preceding embodiment. In this embodiment, the upper packing 273 is divided into three members.

In FIG. 6, an upper packing 273 is provided between the upper tank 43 and the air conditioner case 21. The upper packing 273 includes three packing members: a windward upper packing 273u, an intermediate upper packing 273m, and a leeward upper packing 273d. The windward upper packing 273u is located at the frontmost position in the upper packing 273. The leeward upper packing 273d is located at the rearmost position in the upper packing 273. The intermediate upper packing 273m is located between the leeward upper packing 273u and the leeward upper packing 273d. The upper packing 273 provides an example of an upper cushioning material.

The windward upper packing 273u is attached to the front surface of the upper tank 43. The windward upper upper packing 273u is in contact with the windward upper support portion 63u and is compressed. The leeward upper packing 273d is attached to the rear surface of the upper tank 43. The leeward side upper packing 273d is in contact with the leeward side upper support portion 63d and is compressed. The intermediate upper packing 273 m is attached to the upper surface of the upper tank 43. The intermediate upper packing 273m is compressed by contacting both the leeward upper support portion 63u and the leeward upper support portion 63d.

The leeward upper packing 273u and the leeward upper packing 273d are made of ether-based urethane foam. The middle upper packing 273 m is made of polyethylene foam. However, the intermediate upper packing 273m may be made of the same ether-based urethane foam as the leeward upper packing 273u and the leeward upper packing 273d.

According to the above-described embodiment, the upper packing 273 is composed of a plurality of packing members. Therefore, the ease of compression of the upper packing 273 can be changed for each location. Therefore, the effect of suppressing vibration transmission can be easily adjusted by forming the packing member of the portion where vibration transmission is particularly desired to be suppressed with a material softer than that of other packing members. Further, even if a part of the upper packing 273 is deteriorated, only the packing member that needs to be replaced needs to be replaced, and the entire upper packing 273 does not need to be replaced.

Of the upper packing 273, the leeward upper packing 273u and the leeward upper packing 273d are made of ether-based urethane foam, which is a soft material. Therefore, it is easy to suppress the vibration transmission between the cooler 41 and the air conditioner case 21 via the leeward upper packing 273u and the leeward upper packing 273d.

Other Embodiments The disclosure in this specification, drawings and the like is not limited to the exemplified embodiments. The disclosure includes exemplary embodiments and modifications by those skilled in the art based on them. For example, disclosure is not limited to the parts and / or element combinations shown in the embodiments. Disclosure can be carried out in various combinations. The disclosure can have additional parts that can be added to the embodiment. Disclosures include those in which the parts and / or elements of the embodiment are omitted. Disclosures include replacements or combinations of parts and / or elements between one embodiment and the other. The technical scope disclosed is not limited to the description of the embodiments. Some technical scopes disclosed are indicated by the claims description and should be understood to include all modifications within the meaning and scope equivalent to the claims statement.

Disclosure in the description, drawings, etc. is not limited by the description of the scope of claims. The disclosure in the description, drawings, etc. includes the technical ideas described in the claims, and further covers a wider variety of technical ideas than the technical ideas described in the claims. Therefore, various technical ideas can be extracted from the disclosure of the description, drawings, etc. without being bound by the description of the claims.

1 Vehicle air conditioner, 21 Air conditioner case, 41 Cooler, 42 Core part, 43 Upper tank, 44 Lower tank, 49 Expansion valve, 51 Cover member, 52 Drain hole part, 53 Drainage rib, 63 Upper support part, 63u leeward upper support, 63d leeward upper support, 64 lower support, 64u leeward lower support, 64d leeward lower support, 73 upper packing (upper cushioning material), 73a outer layer packing, 73b inner layer packing, 74 Lower packing (lower cushioning material), 74u Windward lower packing (front lower cushioning material), 74d Downwind lower packing (rear lower cushioning material), 273 Upper packing (upper cushioning material), 273u Windward upper packing, 273m middle Packing, 273d Downwind upper packing

Claims (7)

An air-conditioning case (21) through which the blown air blown into the passenger compartment flows, and
A cooler (41) installed inside the air conditioning case and having a core portion (42), an upper tank (43), and a lower tank (44).
An expansion valve (49) connected to the upper tank and
An upper support portion (63) provided in the air conditioning case and supporting the upper tank, and
A lower support portion (64) provided in the air conditioning case and supporting the lower tank, and
An upper cushioning material (73, 273) interposed between the upper tank and the upper support portion,
A lower cushioning material (74) interposed between the lower tank and the lower support portion,
A cover member (51) provided between the lower tank and the lower cushioning material and covering the front surface, the bottom surface, and the rear surface of the lower tank is provided.
The lower cushioning material in a state of being interposed between the lower tank and the lower support portion is compressed more than the upper cushioning material in a state of being interposed between the upper tank and the upper support portion. A vehicle air conditioner that is a difficult cushioning material. The vehicle air conditioner according to claim 1, wherein the lower cushioning material is made of a material harder than the upper cushioning material. The lower cushioning material is made of polyethylene foam.
The vehicle air conditioner according to claim 2, wherein the upper cushioning material is made of ether-based urethane foam. The lower cushioning material is made of the same material and is made of the same material.
The vehicle air conditioner according to claim 1, wherein the upper cushioning material is composed of a plurality of layers having different hardnesses using different types of materials. The compressibility of the lower cushioning material in a state of being interposed between the lower tank and the lower support portion is the compressibility of the upper cushioning material in a state of being interposed between the upper tank and the upper support portion. The vehicle air conditioner according to claim 1, which is larger than the compression ratio. The lower cushioning material includes a front lower cushioning material (74u) and a rear lower cushioning material (74d), and presses the cover member so as to sandwich the cover member in the front-rear direction. The vehicle air conditioner according to any one of. The cover member is
A plurality of drain holes (52) for draining water on the outer surface of the cooler, and
The vehicle air conditioner according to any one of claims 1 to 6, further comprising a drainage rib (53) for forming a predetermined gap between the cover member and the lower tank.

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