JP4718965B2 - Regenerative cooling unit - Google Patents

Description

  The present invention relates to a cold storage type cooling unit applied to an air conditioner with a cold storage device for a vehicle.

DESCRIPTION OF RELATED ART Conventionally, the air conditioner with a cool storage apparatus provided with the refrigerating cycle (refrigerant circuit) with a cool storage apparatus is known as an air conditioner for truck cabins, for example. In this air conditioner, for example, a cooling coil for storing cold energy for storing cold energy while the vehicle is running is provided so that the cabin can be cooled while the engine is stopped, for example, when the driver takes a nap.
The cooling coil for cold storage is installed in parallel with the air conditioning evaporator used for air conditioning in the cabin during traveling of the vehicle in which the engine is driven during the refrigeration cycle, and alternately supplies refrigerant from the compressor driven by the engine. Receiving and storing cold.

  The cold storage cooling coil described above is installed, for example, in a cold storage type cooling unit attached to a window frame behind the cabin. The regenerator type cooling unit is a regenerator in which a regenerator cooling coil connected to a refrigeration cycle and a regenerator material such as water that is cooled and frozen by the regenerator cooling coil are sealed in a casing provided with an inlet and an outlet. A pack and a fan for sucking the air in the cabin into the casing and blowing out the cool air are provided. That is, the cool storage type cooling unit sucks air in the cabin from the suction port by the operation of the fan, and blows out this air into the cabin from the outlet as cold air cooled by the cold heat of the cool storage pack. Is made possible.

In such a regenerative cooling unit, in order to suppress the size of the unit itself and to ensure the cooling capacity and the cooling time, it is necessary to efficiently and effectively use the cold stored in the cold storage pack. For this reason, a partition member is provided between the evaporator and the case housing the cold storage pack in the air flow path in the case that cools the air sucked from one side in the horizontal direction (front-rear direction) and blows it out from the other side. It has been proposed to increase the contact area between the air and the cold storage pack by meandering in the vertical direction. (For example, see Patent Document 1)
JP 2002-337541 A (see FIG. 3)

By the way, in recent regenerative cooling units, for example, due to the promotion of idling stop, it is important to consider not only conventional nighttime use with relatively low heat load but also daytime use with high heat load. Yes. For this reason, in order to ensure sufficient cooling performance even during daytime use when the heat load increases significantly compared to night use, for example, intrusion heat from a fan inlet, which was not a problem at night use, is a problem. Become. Such intrusion heat is not preferable because it causes an increase in the temperature of the cooled cold air.
Further, in the above-described regenerative cooling unit, in the case of a configuration in which a suction port is provided in the lower center of the casing and the cold air is blown out from the air outlets provided near the upper left and right ends, heat exchange is performed substantially uniformly with the entire regenerator pack. It is difficult to blow cold air from the left and right outlets. More specifically, the main flow of air sucked from the lower center of the casing forms a substantially linear flow obliquely toward the air outlets at the left and right ends of the upper portion. Therefore, for example, near the lower ends of the cold storage pack and near the upper center, the flow of air to exchange heat decreases, and there arises a problem that the heat storage cooling operation that sufficiently utilizes the cold heat stored in the cold storage material of the same portion cannot be performed. .

  The present invention has been made in view of the above circumstances, and the object of the present invention is to provide a suction port at the lower center of the casing and blow out cold air from the outlets provided near the upper left and right ends. An object of the present invention is to solve the problem caused by heat intrusion in the constructed regenerative cooling unit, and to enable the regenerative cooling operation to effectively use the cooling heat of the entire regenerative pack substantially evenly.

In order to solve the above problems, the present invention employs the following means.
A regenerator type cooling unit according to the present invention cools a regenerator cooling coil connected to a refrigeration cycle for vehicle air conditioning in a casing provided with an air inlet and a cold air outlet, and the regenerator cooling coil. In a regenerative cooling unit comprising a cold storage pack in which a cold storage material is sealed, and a fan that sucks and blows air, and the suction port is disposed at the center of the lower part and the outlets are disposed near both left and right ends of the upper part. An internal case for housing the cold storage cooling coil and the cold storage pack is provided , a groove is formed on the surface of the cold storage pack, and the cold storage pack is arranged to sandwich the flat extruded tube of the cold storage cooling coil from both sides. The groove portion and the air flow rate so that the air volume flowing through the groove portion is less than the air volume flowing through the air flow path formed along the surface of the cold storage pack. It is characterized in that it has set the channel shape ratio of the air flow path.

According to such a regenerative cooling unit, since an internal case for storing a regenerative cooling coil and a regenerative pack is provided, intrusion heat can be prevented by manufacturing the internal case with a material having high heat insulation performance and reinforcing the heat insulation. be able to. Moreover, by forming the groove on the surface of the cold storage pack, the heat transfer area of the cold storage pack can be increased and the cooling capacity can be improved. In this case, the heat transfer area of the cold storage pack is further increased by meandering the groove. Furthermore, the cold storage pack is arranged so that the flat extruded tube of the cooling coil for cold storage is sandwiched from both sides, and the amount of air flowing through the groove with high heat exchange efficiency is reduced, so that uniform cooling is possible and maximum use of the exchange heat amount is possible. can do.

In the above regenerative cooling unit, the inner case is divided into left and right, and an air flow path formed between the inner surface of the inner case and the surface of the regenerator pack and extending from the suction port to the blower outlet flows. It is preferably formed in a zigzag shape that reverses the direction alternately, whereby a zigzag air flow path from the lower center inlet to the upper right outlet and the upper left outlet from the lower center inlet Since the zigzag air flow path leading to is formed separately, the air sucked from the suction port passes through the entire surface of the cold storage pack substantially uniformly and is blown out from the blowout port.
In this case, the zigzag shape may be either the vertical direction or the horizontal direction.

  In the above regenerative cooling unit, it is preferable to attach a baffle plate to the connection portion between the fan and the inner case, thereby preventing intrusion heat from around the fan inlet.

  In the above-described regenerative cooling unit, the drain pan disposed below the regenerator pack is preferably provided so as to be inclined from the suction port toward the left and right ends. The amount of heat exchanged can be made uniform, and the amount of heat exchanged can be maximized by cooling the groove part uniformly.

According to the above-described regenerative cooling unit of the present invention, if the inner case that houses the regenerative cooling coil and the regenerative pack is manufactured with a material having high heat insulation performance and the heat insulation is reinforced, the blowout temperature of the cold air rises. Since it is possible to prevent the cold heat stored in the cold storage pack from being consumed due to intrusion heat, the air conditioning performance such as air conditioning feeling and blowing temperature can be improved and the air-conditioning time can be extended. can get.

In addition, the zigzag air flow path from the lower central suction port to the upper right outlet and the zigzag air flow passage from the lower central suction port to the upper left outlet are formed separately, so The air sucked from the mouth passes through the entire surface of the cold storage pack substantially uniformly and is blown out from the left and right outlets. Therefore, it is possible to cool the entire cool storage pack substantially uniformly, and to effectively use the cool heat of the entire cool storage pack to perform heat storage cooling operation with high cooling capacity and long cooling time.
Further, the air conditioning performance can be improved and the air conditioning possible time can be extended by optimizing the groove formed on the surface of the cold storage pack, the flow channel shape ratio, the inclined installation of the drain pan, and the attachment of the seal member.

Hereinafter, an embodiment of a regenerative cooling unit according to the present invention will be described with reference to the drawings.
The refrigerant circuit diagram shown in FIG. 9 is mainly applied to a vehicle air conditioner, and is adopted, for example, in an air conditioner with a cool storage device installed in a vehicle such as a truck. In FIG. 9, 1 is a compressor, 2 is a condenser, 3 is a receiver, 4 is an air conditioning evaporator, 5 is a temperature type expansion valve (hereinafter also referred to as an “air conditioning expansion valve”), and 7 is provided. Is an air conditioning solenoid valve, 8 is a cooling coil for cold storage, 9 is a temperature type expansion valve (hereinafter also referred to as “cold storage expansion valve”), 11 is a cold storage electromagnetic valve, and 12 is a check valve. , 13 is a frost thermostat that operates by detecting the temperature of the air conditioning evaporator, and 14 is a control device for the entire apparatus.

In the air conditioner with a regenerator configured from the above-described elements, the air conditioning evaporator 4 and the regenerator cooling coil 8 arranged in parallel in the refrigerant circuit include the air conditioner solenoid valve 7 and the animal A cold solenoid valve 11 is provided. The control device 14 performs opening / closing control by alternately energizing the air conditioning electromagnetic valve 7 or the cold storage electromagnetic valve 11, and causes the refrigerant to flow alternately through the air conditioning evaporator 4 and the cold storage cooling coil 8. In this case, the operation time of the air conditioning evaporator 4 and the operation time of the cold storage cooling coil 8 are set to be a predetermined time ratio, for example, and the control device 14 controls the air conditioning electromagnetic valve 7 and the cold storage electromagnetic wave based on this time ratio. The opening and closing of the valve 11 is controlled.
As an example of the operation time described above, for example, the air conditioning operation time for flowing the refrigerant to the air conditioning evaporator 4 is 45 seconds, and the cold storage operation time for flowing the refrigerant to the cold storage cooling coil 8 is 20 seconds.

As shown in FIGS. 3 to 6, the regenerative cooling unit 20 including the regenerative cooling coil 8 is used for cooling a nap room installed in the cabin of a truck and provided behind the driver's seat, for example. . In the illustrated example, in place of the window glass provided on the wall surface behind the cabin, a regenerative cooling unit 20 is installed upright in the vertical (vertical) direction.
The regenerator type cooling unit 20 includes a regenerator unit 30 and a fan 40 in a casing 23 provided with an air inlet 21 and a cold air outlet 22. The cold storage unit 30 seals the cold storage cooling coil 8 connected to the above-described refrigeration cycle (refrigerant circuit) for vehicle air conditioning and the cold storage material such as water cooled by the cold storage cooling coil 8 in a pack case. The cold storage pack 31 is provided, and the cooling coil 8 for cold storage and the internal case 35 for storing the cold storage pack 31 are provided. The cold storage unit 30 has a configuration in which both sides of a flat extruded tube 8 a constituting the cold storage cooling coil 8 are sandwiched by cold storage packs 31 from both sides. For example, as shown in FIG. 1, the cold storage cooling coil 8 is configured such that a pair of left and right headers 8b, 8b are connected by a plurality (three in the illustrated example) of flat extruded tubes 8a. The tube 8a is provided with a large number of refrigerant flow paths (not shown).

The fan 40 has a function of sucking in air to be cooled from the cabin into the casing 23 and blowing out cool air cooled by heat exchange with the cold storage pack 31 when passing through the casing 23.
The casing 23 is divided into a front panel 23F exposed facing forward in the cabin, and a rear panel 23R attached to the window glass opening 16 of the panel member 15 forming the cabin rear wall surface.

The rear panel 23R is fixedly supported on the rear wall surface of the cabin with the periphery sandwiched by the wind dam 17 instead of the window glass. The rear panel 23R is fixedly supported by the cold storage unit 30 described above, and a front panel 23F is attached so as to cover the front surface of the cold storage unit 30. The front panel 23F is detachably fixed to the rear panel 23R using bolts or the like that penetrate the cold storage unit 30, and in this fixed state, a gap 24 in the front-rear direction is provided between the front panel 23F and the rear panel 23R. Is provided over the entire circumference.
That is, in the regenerator type cooling unit 20, the refrigerant supplied to the regenerator cooling coil 8 and the regenerator cooler coil 8 receiving the supply of refrigerant from the refrigerant circuit in the casing 23 provided with the suction port 21 and the outlet 22 absorbs heat. Then, the cool storage unit 31 is formed by housing the cool storage pack 31 to be cooled in the inner case 35, and the fan 40 that forms the flow of air.

On the front surface of the front panel 23F, a suction port 21 that penetrates a panel material such as resin to the back surface is disposed at the center of the lower portion. Similarly, a pair of left and right outlets 22 and 22 that penetrate the panel material to the back surface are provided in the upper portion. It is arranged near both left and right ends. The pair of left and right outlets 22, 22 are arranged symmetrically with respect to the suction port 21 at the center of the lower part.
Further, a fan 40 is installed in the upper part of each of the air outlets 22, 22, and the air in the cabin is sucked from the air inlet 21, and the cool air blown through the air passages and grooves described later is blown out. It blows out into the cabin from the outlets 22 and 22. The fan 40 is fixed to the upper part of the back surface of the front panel 23F.

The inner case 35 is a molded part such as a resin, and in particular, it is preferable to employ a material having high heat insulation performance to enhance heat insulation.
The inner case 35 forms a gap 32 serving as an air flow path between the front and rear surfaces of the cold storage pack 31 holding the flat extruded tube 8a, and forms a suction opening 33 communicating with the suction port 21 in the lower part. The air outlet 34 is formed in the upper part so as to communicate with the left and right air outlets 22, respectively. The inner case 35 is fixedly supported by a bolt or the like not shown on the rear panel 23R as a cold storage unit 30 integrated with the cold storage cooling coil 8 and the cold storage pack 31 housed inside.
By providing such an inner case 35, the heat insulation performance of the cold storage unit 30 is increased and intrusion heat is prevented, so that the cold storage pack 31 and the cold storage cooling coil 8 are less susceptible to the intrusion heat from the outside.

Further, the inner case 35 includes a drain pan 36 below the cold storage pack 31 in order to collect and drain the condensed water (drain water) falling below the cold storage cooling coil 8 and the cold storage pack 31. The drain pan 36 is set so that a central portion where the suction port 21 is located is set low, and is inclined so as to increase from the central portion toward both end portions. As a result, the drain pan 36 is inclined so as to gradually increase from the central suction port 21 side toward the left and right end portions, so that the drain pan 36 communicates with the suction opening 33 and between the drain pan 36 and the lower end portion of the cold storage pack 31. As for the gap part formed, the flow path cross-sectional area is gradually narrowed toward the both ends from the suction port 21 side.
Due to such a change in the cross-sectional area of the flow path, the air volume distribution flowing through the groove portion 31a of the cold storage pack 31 to be described later becomes uniform, so that the cold heat held by the cold storage pack 31 can be utilized to the maximum.

In the above-described regenerative cooling unit 20, the gaps 32 formed between the inner wall surface of the inner case 35 and the front and rear surfaces of the regenerator pack 31 cause air to flow from the inlet 21 to the outlet 22 by the operation of the fan 40. It functions as an air flow path 50 for guiding.
FIG. 1 is a cross-sectional view schematically showing the right half as an example of the internal structure of the cold storage pack 30 divided into right and left, and air is provided in the gap 32 existing between the inner wall surface of the internal case 35 and the cold storage pack 31. A flow path 50 is formed. This air flow path 50 is provided for each of the two cold storage units 30 divided right and left along the central portion of the blower outlet 21 along the surface of the cold storage pack 31 installed inside thereof, from the inlet 21 to the blower outlet 22. It is a zigzag-shaped flow path leading to

The zigzag-shaped air flow path 50 is formed in each internal case 35 by a flow path partition member 51 that alternately reverses the flow direction from the inlet 21 to the outlet 22.
In the illustrated example, the periphery of the cold storage pack 31 is surrounded by the inner case 35 leaving the suction opening 33 and the blowout opening 34, and the suction port 21 is provided at the lower end and the upper end of the gap 32 that becomes the air flow path 50. And the partition walls 52 and 53 are provided except the part used as the suction opening 33 and the blower opening 34 which are connected to the blower outlet 22. FIG. The rectangular regions defined by the partition walls 52 and 53 and the wall surface of the inner case 35 are arranged in the vertical direction, leaving the left and right communication portions 50a and 50b in which the gap 32 that becomes the air flow path 50 becomes the flow path. Since the right and left direction is divided into three parts by the flow path partition member 51 provided in the zigzag, a zigzag air flow path 50 that changes the flow direction in the vertical direction is formed. Such an air flow path 50 is formed on both front and rear surfaces of the cold storage pack 31 that sandwiches the flat extruded tube 8a.

By the way, in description of embodiment mentioned above, although it was set as the zigzag shape which divided the air flow path 50 of 2 right-and-left systems into the left-right direction, according to the shape of the cool storage unit 30 and the cool storage pack 31, etc. The number of divisions on the left and right can be changed as appropriate.
In the above-described embodiment, the zigzag shape of the air flow path 50 is formed by the flow path partition member 51 provided in the vertical direction. However, the zigzag shape of the air flow path 50 is formed by the flow path partition member provided in the left and right direction. May be.

  The cold storage pack 31 described above has a groove 31a formed on one surface. Since this groove part 31a increases the heat transfer area of the cold storage pack 31, it is effective in improving the air cooling capacity. Further, for example, as shown in FIG. 2, if the groove 31a is provided in a meandering manner, not only the heat transfer area of the cold storage pack 31 is increased, but also the flow of air flowing through the groove as compared with the linearly provided groove. Since the path length also increases, it is possible to improve the cooling efficiency of the air using the cold heat held by the cold storage pack 31.

  The groove portion 31a described above forms an air flow path communicating with the surface of the flat extruded tube 8a to be sandwiched in the vertical direction in the regenerator unit 30. Hereinafter, this air flow path is referred to as the groove air flow path 54. Call. The groove air passage 54 is a flow path in which a part of the air sucked from the suction port 21 flows toward the outlet 22. In other words, the air sucked from the suction port 21 is formed by all the groove portions 31a from the gap portion formed between the one that flows into the air flow path 50 from the suction opening 33 and the lower end portion of the cold storage pack 31 and the drain pan 36. The air flows into the groove air flow path 54 and then flows through different air flow paths, and is then merged by the fan 40 and flows out from the air outlet 22.

As described above, one of the cold storage units 30 (right half in FIG. 1) divided into right and left with the suction port 21 as the center includes a zigzag air flow path 50 formed before and after the cold storage pack 31, and the cold storage pack. And a groove air flow path 54 formed by the groove 31 a of 31.
And since the air flow path 50 and the groove part air flow path 54 which were mentioned above are similarly provided in the other (left half) cold storage unit 30 as left-right symmetry, the air sucked in from the suction inlet 21 is left and right. The cold storage unit 30 is provided with two left and right channels.

As a result, the air in the cabin sucked from one suction port 21 provided in the lower center of the front panel 23F is divided into the two cool storage units 30 approximately equally to the left and right, and then in each cool storage unit 30. Is divided into the air flow path 50 and the groove air flow path 54.
At this time, the channel shape ratio of the air channel 50 and the groove air channel 54 is set so that the amount of air flowing through the groove air channel 54 is smaller than the amount of air flowing through the air channel 50. This is because the heat transfer area is larger than that of the flat surface, and by reducing the amount of air (air volume) flowing through the groove air flow path 54 with good heat exchange efficiency, the inside of the cold storage pack 31 on the groove air flow path 54 side becomes the air flow path 50. It prevents it from cooling before the side. As a result, the cold heat held by the cold storage pack 31 can be allowed to cool substantially uniformly over the entire pack, so that the amount of exchange heat of the heat storage pack 31 can be utilized to the maximum.
That is, if the regenerator material in the regenerator pack 31 cannot be unwound uniformly, the temperature of the air that flows through the air flow path that has previously been unwound and has no cooling capacity rises, so that the final blowing temperature after merging increases. For this reason, the regenerative cooling unit 20 cannot blow out the cold air cooled to a desired temperature.

Here, a specific example for optimizing the flow path shape ratio will be described with reference to FIGS. 1 and 7. In the following description, the exchange heat amount on the groove air flow path 54 side is Qc, and the air volume (air volume). Is Wc, the equivalent groove diameter is Dc, the exchange heat amount on the air flow path 50 side is Qu, the air volume (air volume) is Wu, and the flow path height is Du. The equivalent groove diameter Dc is expressed by the following formula, where h is the groove height and c is the groove width.
Dc = 4hc / {2 (h + c)}

FIG. 7B is a graph showing the relationship between the air volume ratio (Wu / Wc) on the horizontal axis and the exchange heat quantity ratio (Qu / Qc) on the vertical axis. And since uniform cooling is Wu / Wc = 1, if the allowable range of uniform cooling is defined to be within 1 ± 20%, the exchange heat quantity ratio is 0.8 to 1.2. Therefore, when the air volume ratio corresponding to this exchange heat quantity ratio is read from FIG. 7B, Wu / Wc = 1.5 to 2.75.
Subsequently, when the flow channel shape ratio (Du / Dc) corresponding to the air flow ratio of 1.5 to 2.75 is read from FIG. 7A, Du / Dc = 1.0 to 1.3. Therefore, for example, if the groove height h of the groove 31a is 10 mm and the groove width c is 5 mm, the groove equivalent diameter Dc is 6.7 mm. In this case, the allowable channel height Du is 6.7 (6. 7 × 1.0) to 8.7 (6.7 × 1.3) mm.

Then, the intrusion heat prevention measure of the cool storage type cooling unit 20 is demonstrated based on FIG.
This intrusion heat is generated by external air (air that has not passed through the inside of the internal case 35 or air that has been sucked into the fan 40 through a gap 25 formed between the fan 40 attached to the front panel 23F and the internal case 35. , Uncooled air) enters and is mixed with cold air that has been cooled at all, thereby raising the blowing temperature.
Therefore, the air guide plate 60 provided with a sealing member such as sponge or urethane is attached to the connection portion between the casing 41 of the fan 40 and the inner case 35 to close the gap 25 and sucked into the air flow path 50 through the gap 25. Prevent the flow of external air.

In the first embodiment shown in FIG. 8A, the air guide plate 60 is previously attached to the casing 41 of the fan 40 fixed to the front case 23F, and the front panel 23F is attached to a predetermined position of the rear panel 23R. Then, the sealing member 61 of the air guide plate 60 is pressed against the inner case 35 from the outside so as to close the gap 25 of the connecting portion.
Further, in the second embodiment shown in FIG. 8B, when the air guide plate 60 is attached in advance to the inner case 35 side and the front panel 23F is attached to a predetermined position of the rear panel 23R, the air guide plate 60 is provided. The sealing member 61 is pressed against the casing 41 of the fan 40 so as to close the gap 25 of the connecting portion from the inside.
Further, in the third embodiment shown in FIG. 8C, the air guide plate 60 is attached in advance to both the casing 41 and the inner case 35 of the fan 40, and the front panel 23F is attached to a predetermined position of the rear panel 23R. Then, the seal member 61 attached to both the air guide plates 60 or one of the air guide plates 60 and the seal member 61 attached to the other air guide plate 60 are brought into close contact with each other so as to close the gap 25 of the connecting portion. ing.

  As described above, when high-temperature air is sucked from the gap 25 and is prevented from flowing into the air flow path 50, the cool air that has passed through the inside of the inner case 35 and has been cooled by the cold storage pack 31 has a temperature due to intrusion heat. Therefore, it is possible to obtain good cooling performance while maintaining the blowing temperature of the cold air.

As described above, according to the regenerative cooling unit 20 of the present invention, if the internal case 35 that houses the regenerative cooling coil 8 and the regenerative pack 31 is made of a material having high heat insulation performance and is heat strengthened, As the air temperature can be prevented from rising and the cold heat stored in the cold storage pack 31 can be prevented from being consumed by intrusion heat, air conditioning performance such as air conditioning feeling and air temperature can be improved and air conditioning can be performed. The time can be extended.
Further, a zigzag air flow path 50 extending from the lower central suction port 21 to the upper right outlet 22 and a zigzag air flow path 50 extending from the lower central suction port 21 to the upper left blow outlet are separately formed. Therefore, the air sucked from the suction port 21 passes through the entire surface of the cold storage pack 31 substantially uniformly and is blown out from the left and right outlets 22. Accordingly, the entire cold storage pack 31 can be allowed to cool substantially uniformly, and the entire amount of the cold heat stored in the cold storage pack 31 can be effectively used substantially evenly so that the cooling capacity is high and the cooling time is long. Cooling operation is possible.

In addition, the air conditioning performance can be improved and the air conditioned time can be extended by optimizing the groove portion 31a formed on the surface of the cold storage pack 31, the flow path shape ratio, the inclined installation of the drain pan 36, and the installation of the air guide plate 60. .
In addition, this invention is not limited to embodiment mentioned above, In the range which does not deviate from the summary of this invention, it can change suitably.

It is a figure which shows one Embodiment of the cool storage type cooling unit which concerns on this invention, (a) is sectional drawing which shows typically the structural example of a cool storage unit, (b) is a schematic diagram which shows an air flow path. It is a front view which shows the example of a shape of a cold storage pack. It is a side view which shows the example of a state in which the cool storage type cooling unit which concerns on this invention was installed in the cabin. FIG. 4 is a front view of FIG. 3. It is a front view which shows the state which removed the front panel from the cool storage type cooling unit of FIG. 3, and exposed the cool storage unit. It is AA sectional drawing of FIG. 5 which shows the state which attached the front case. It is a graph explaining optimization of a channel shape ratio, (a) is a graph which shows the relation between channel shape ratio and air volume ratio, and (b) is a graph which shows the relationship between exchange heat quantity ratio and air volume ratio. . It is a figure which shows the structural example which seals the clearance gap between a connection part, (a) is sectional drawing which shows 1st Example, (b) is sectional drawing which shows 2nd Example, (c) shows 3rd Example. It is sectional drawing. It is a refrigerant circuit diagram of the air conditioner with a cool storage device applied to the vehicle air conditioner.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Compressor 2 Capacitor 4 Evaporator for air conditioning 5,9 Expansion valve 7 Air conditioning solenoid valve 8 Cooling coil for cool storage 8a Flat extrusion tube 11 Cool storage solenoid valve 14 Controller 20 Cool storage type cooling unit 21 Suction port 22 Outlet 23 Casing 23F Front panel 23R Rear panel 30 Cold storage unit 31 Cold storage pack 31a Groove 32 Clearance 35 Inner case 36 Drain pan 40 Fan 50 Air flow channel 51 Flow channel partition member 54 Groove air flow channel 60 Air guide plate

Claims (5)

In a casing provided with an air inlet and a cold air outlet, a regenerative cooling coil connected to a refrigeration cycle for vehicle air conditioning, a regenerative pack in which a regenerator material cooled by the regenerative cooling coil is sealed, and air In a regenerative cooling unit that includes a fan that sucks and blows in, and the suction port is disposed in the center of the lower portion and the outlet is disposed in the vicinity of both left and right ends of the upper portion.
An internal case for storing the cooling coil for cold storage and the cold storage pack is provided , and a groove is formed on the surface of the cold storage pack,
The cold storage pack is arranged so as to sandwich the flat extruded tube of the cold storage cooling coil from both sides, so that the amount of air flowing through the groove is less than the amount of air flowing through the air flow path formed along the surface of the cold storage pack. A regenerator type cooling unit characterized in that a flow channel shape ratio between the groove and the air flow channel is set .   The inner case is divided into right and left, and an air flow path formed between the inner surface of the inner case and the surface of the cold storage pack and extending from the suction port to the blowout port alternately reverses the flow direction. The regenerative cooling unit according to claim 1, wherein the regenerative cooling unit is formed as described above. The regenerative cooling unit according to claim 1 or 2 , wherein the groove is meandered. The regenerative cooling unit according to any one of claims 1 to 3 , wherein a wind guide plate provided with a sealing member that shields the fitting portion is attached to a connection portion between the fan and the inner case. The drain pan disposed below the cold storage pack, according to any one of claims 1 to 4, characterized in that is provided obliquely so as to be higher toward the left and right both ends from the inlet Regenerative cooling unit.

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