JP4363336B2 - Air conditioning - Google Patents

Description

  The present invention relates to an air conditioning apparatus including a cooling heat exchanger that cools air flowing in an air conditioning duct, and in particular, evaporates the refrigerant by using an action of an adsorbent adsorbing a gas phase refrigerant, and evaporates the refrigerant. The present invention relates to an adsorbing refrigeration system that exhibits refrigeration capacity by latent heat.

  Conventionally, as this type of air-conditioning apparatus, for example, as shown in Patent Document 1, the second refrigerant (for example, water) is evaporated by using the action of the adsorbent adsorbing the gas-phase refrigerant, and the latent heat of evaporation is used. 2. Description of the Related Art An adsorption refrigeration apparatus that exhibits refrigeration capacity is known to be provided in combination with an air conditioning apparatus that includes a vapor compression refrigeration cycle to improve the cooling capacity of the apparatus.

Specifically, the evaporated first refrigerant (for example, chlorofluorocarbon) flowing between the evaporator and the gas-liquid separator constituting the vapor compression refrigeration cycle is converted into the second refrigerant (for example, chlorofluorocarbon) by the adsorption action (for example, The evaporation / condensation core of the adsorption refrigeration apparatus is also provided so as to be further cooled with water (for example, see Patent Document 1).
JP 2003-312240 A

  However, according to Patent Document 1, in the method in which the first refrigerant exchanges heat with air using an evaporator and then exchanges heat with the second refrigerant using an evaporation / condensation core, heat loss associated with each heat exchange increases. As a result, the heat exchange efficiency decreases. In addition, the heat capacity of the second refrigerant, the adsorber, the evaporation / condensation core, and the connecting pipes connecting them is added to increase the filling amount of the adsorbent, resulting in a problem that the adsorption refrigeration apparatus becomes large.

  In addition, in a cooling / heating apparatus having a cooling heat exchanger in an air conditioning duct, a heater core is generally provided on the downstream side of the air flow of the cooling heat exchanger so as to heat the air cooled by the cooling heat exchanger. In particular, the heater core that uses engine coolant as a heat source is an indispensable heat exchanger for heating.

  Therefore, in order to improve the cooling capacity of the cooling / heating device, it is difficult to provide an evaporation / condensation core of the adsorption refrigeration device between the cooling heat exchanger and the heater core.

  Therefore, an object of the present invention is to take the above points into consideration, and by providing an air-conditioning duct with an adsorption refrigeration apparatus including a heat exchanger having heating and cooling functions instead of a heater core, the cooling and heating functions can be achieved. The object is to provide a cooling / heating device that can achieve both.

In order to achieve the above object, the technical means according to claims 1 to 9 are employed. That is, in the invention described in claim 1, in an air conditioning apparatus including an air conditioning duct (11) that forms an air passage and a cooling heat exchanger (12) that cools air flowing in the air conditioning duct (11). ,
An adsorber (20) that desorbs the refrigerant by being filled with an adsorbent and heated by a heating medium, and adsorbs the refrigerant by being cooled by a cooling medium, and the adsorber (20) is a refrigerant And an evaporating liquefied heat exchanger (30) that evaporates the refrigerant when heated by a heating medium and adsorbs the gas-phase refrigerant. An adsorption refrigeration apparatus (100) that evaporates the refrigerant and exerts the refrigerating capacity by the latent heat of evaporation is disposed,
The adsorption refrigeration apparatus (100) generates latent heat of evaporation when the refrigerant evaporates in the evaporative heat exchanger (30) when the evaporative heat exchanger (30) communicates with the adsorber (20). The cooling source is configured to further cool the air cooled by the cooling heat exchanger (12),
When the communication between the evaporative liquefaction heat exchanger (30) and the adsorber (20) is cut off and the heating medium is circulated through the evaporative liquefaction heat exchanger (30), the refrigerant is transferred to the evaporative liquefaction heat exchanger (30). It is characterized in that the air cooled by the cooling heat exchanger (12) is heated by using the heat of condensation when the refrigerant is vaporized and the refrigerant is liquefied as a heat source.

  According to the first aspect of the present invention, the evaporative heat exchanger (30) having a cooling and heating function can be disposed on the downstream side of the air flow of the cooling heat exchanger (12). Thereby, compared with the conventional system which further cools the refrigerant evaporated in the cooling heat exchanger (12), the heat loss of heat exchange can be reduced by configuring the heat exchanger separately. The cooling capacity of the air conditioner can be improved.

  Moreover, the heating medium circulated through the adsorber (20) can be circulated through the evaporative heat exchanger (30) to have a heating function. That is, as an alternative to the conventional heater core, the evaporative liquefaction heat exchanger (30) can be disposed downstream of the air flow of the cooling heat exchanger (12). Thereby, an adsorption | suction type freezing apparatus (100) can be attached to the conventional air-conditioning duct (11).

  Since the heater core is generally configured to heat the air by heating the heating medium and air, the heating medium can be used as it is in the evaporative heat exchanger (30).

  In the invention according to claim 2, the evaporative liquefied heat exchanger (30) includes a pair of header tanks (31, 32) along the horizontal direction between the pair of header tanks (31, 32) and the two tanks (31, 32). A header tank (34) having a core part (33) in which a plurality of heat exchange pipes composed of a tube (34) and fins (35), both ends of which are connected to each other, are arranged in parallel, and disposed above 31) is formed so as to communicate with the adsorber (20), and is further formed so as to exchange heat between the refrigerant sealed in the header tank (32) disposed below and the heating medium. Yes.

  Specifically, the cooling function for evaporating the refrigerant by the adsorption action can be formed by communicating the refrigerant enclosed inside with the adsorber (20). Moreover, the heating function which heats a refrigerant | coolant with a heating medium can be formed. Thereby, the cooling and heating functions can be compatible with one heat exchanger.

  In the invention according to claim 3, the adsorption refrigeration apparatus (100) includes the evaporative heat exchanger (30) and the adsorber (20) after the desorption process in which the adsorber (20) is heated by the heating medium. The adsorbent is configured to maintain the cold storage state by interrupting the communication with the adsorber (20) and allowing the adsorbent (20) to flow through the cooling medium.

  According to the third aspect of the present invention, the adsorber (20) is desorbed and maintained in a cold storage state so that the adsorbent, the refrigerant, and the adsorption heated at the time of desorption when switched to the adsorption process. It is not affected by the heat capacity of the vessel (20), the evaporative heat exchanger (30) and the connecting members connecting them.

  In the invention described in claim 4, a heating pipe (37) which is formed in a tube shape and through which a heating medium flows is provided, and the evaporative heat exchanger (30) is provided in a header tank (32) disposed below. A heating tube (37) is disposed inside, and heat is exchanged between the refrigerant and the heating medium.

  More specifically, according to the invention described in claim 4, the refrigerant is heated by the heating pipe (37) provided below to vaporize the water vapor, and the water vapor is heat-exchanged with the air to return to the water. A heating function can be formed by a siphon.

  In the invention according to claim 5, the heating tube (37) is characterized in that its outer surface is formed in an uneven shape. According to the fifth aspect of the present invention, the heat transfer area to the refrigerant side can be easily expanded by forming the projections and depressions in comparison with the flat surface.

  In the invention described in claim 6, the heating tube (37) is characterized in that fins (37b) for expanding the heat transfer area are formed on the outer surface thereof. According to invention of Claim 6, the heat-transfer area to a refrigerant | coolant side can be expanded more easily than the said uneven | corrugated shape.

  In the invention according to claim 7, the evaporative liquefaction heat exchanger (30) is provided with internal fins (32a) for expanding the heat transfer area on the inner surface of the header tank (32) disposed below, The outer surface of the header tank (32) and the heating medium are formed so as to exchange heat.

  According to the invention described in claim 7, in the above-described claims 6 and 7, the heating pipe (37) is arranged in the refrigerant so as to exchange heat. The refrigerant may be heated via (32).

  The invention according to claim 8 is characterized in that the evaporative heat exchanger (30) is provided with a porous body (34a) for sucking refrigerant into the inner surface of the tube (34). According to the eighth aspect of the present invention, in the heat exchange between the refrigerant and the air, the suction of the refrigerant reaches the entire surface of the tube (34) by the porous body (34a), so that the refrigerant can be efficiently evaporated.

  In the invention according to claim 9, the adsorber (20), the liquid-cooled internal combustion engine (50), and the radiator (40a) are connected in series by a pipe, and the adsorber (20) is connected to the radiator (40a). It is characterized by being arranged on the downstream side.

  According to the ninth aspect of the present invention, the liquid-cooled internal combustion engine (50) and its cooling water act on the cooling of the adsorber (20) at a low temperature immediately after the liquid-cooled internal combustion engine (50) is started. At high temperatures after the lapse of time, the adsorber (20) can be heated. Thereby, the heat capacity and waste heat of the liquid-cooled internal combustion engine (50) can be used effectively.

  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)
Hereinafter, the air conditioning apparatus in 1st Embodiment of this invention is demonstrated based on FIG. 1 thru | or FIG. The present invention is applied to a vehicle air conditioner. FIG. 1 is a schematic diagram showing an overall configuration of an air-conditioning apparatus, and FIG. 2 is a front view showing an overall configuration of an evaporative heat exchanger 30.

  FIG. 3 is a schematic diagram showing a circulation path of the heating medium when the adsorber 20 performs a desorption action, and FIG. 4 is a schematic diagram showing a circulation path of the cooling medium when the adsorber 20 enters a cold storage state. FIG. 5 is a schematic diagram showing a circulation path of the heating medium in the evaporative heat exchanger 30. FIG. 1 shows the circulation path of the cooling medium when the adsorber 20 performs the adsorbing action.

  As shown in FIG. 1, the air-conditioning apparatus of the present embodiment is a liquid-cooling type, as will be described in detail later, on the downstream side of the air flow of the cooling heat exchanger 12 disposed in the air-conditioning duct 11 forming the air passage. An adsorption refrigeration apparatus 100 that is driven by waste heat of an internal combustion engine (hereinafter referred to as an engine) 50 is also provided.

  The air-conditioning duct 11 is an air-conditioning case for blowing air-conditioning air whose temperature is adjusted toward a plurality of air outlets provided in the vehicle interior. A vessel 12 and an evaporative heat exchanger 30 to be described later are disposed.

  The cooling heat exchanger 12 is a component part of a vapor compression refrigeration cycle in which a compressor, a condenser, a liquid receiver, and a decompression unit (not shown) are connected in an annular line in this order, and flows in the air conditioning duct 11. It is an evaporator for exchanging heat between air and a refrigerant sealed inside. That is, it is a heat exchanger that cools the air flowing in the air conditioning duct 11.

  Incidentally, the compressor (not shown) is driven via an electromagnetic clutch (not shown) by a power transmission means including a pulley and a V-belt with the engine 50 as a drive source. And the gaseous-phase refrigerant | coolant suck | inhaled from the heat exchanger 12 for a cooling is compressed into the gaseous-phase refrigerant | coolant of a high-temperature / high pressure superheated gas state.

  The condenser (not shown) is a heat exchanger that condenses the high-temperature refrigerant compressed by the compressor by exchanging heat with the atmosphere using a condenser blower (not shown). Then, the refrigerant condensed by the condenser is gas-liquid separated by a liquid receiver (not shown), and the liquid phase refrigerant is stored. Then, the liquid phase refrigerant flows into, for example, an expansion valve that is a decompression unit.

  The expansion valve is a valve that depressurizes the liquid-phase refrigerant, and is constituted by a temperature-type expansion valve. The gas-liquid two-phase refrigerant depressurized by the expansion valve flows out to the cooling heat exchanger 12. Then, in the cooling heat exchanger 12, heat is exchanged with air by a blowing means (not shown) to evaporate. Air is cooled by the latent heat of vaporization at this time.

  Next, as shown in FIG. 1, the adsorption refrigeration apparatus 100 includes an engine 50, a radiator 40, an adsorber 20, and an evaporative liquefaction heat exchanger 30. In the figure, 43 and 53 are circulation pumps, 41 and 42 are switching valves for switching the flow direction, and 51 is a hot water valve.

  The engine 50 is an internal combustion engine that serves as a driving source for traveling, and the circulation pump 53 is a pump that pumps the heating medium circulated through the engine 50. The radiator 40 is a radiator that cools the cooling medium by exchanging heat between the cooling medium circulating through the adsorber 20 and the air. The circulation pump 43 is a pump that pumps the cooling medium. Here, as the heating medium and the cooling medium, the same fluid in which ethylene glycol antifreeze is mixed with water such as engine cooling water is used.

  Next, the adsorber 20 is a container that accommodates the adsorbent 21 (in this embodiment, for example, silica gel or zeolite) and the adsorbing core 22 to which the surface is adhered. Further, the inside of the adsorber 20 is maintained in a substantially vacuum state, and is configured to communicate with the evaporating heat exchanger 30 via an on-off valve 39 described later.

  Here, the adsorbent 21 is a reaction material that generates heat when adsorbing the evaporated refrigerant while the amount of the adsorbable refrigerant decreases as the temperature increases. For this reason, when the adsorbent 21 is heated, the amount of refrigerant that can be adsorbed decreases, so that the adsorbed refrigerant is desorbed and released until the amount of refrigerant that can be adsorbed at the heating temperature is reached. When cooled, the amount of refrigerant that can be adsorbed increases, so that the refrigerant is adsorbed until the amount of refrigerant that can be adsorbed at the heating temperature.

  Incidentally, the adsorbent 21 normally generates adsorption heat equivalent to the heat of condensation of the refrigerant (= condensation heat + α) when adsorbing the refrigerant, and can be adsorbed by the temperature of the adsorbent 21 even at the same relative temperature. It has hysteresis characteristics such that the amount of refrigerant is different.

  Further, the adsorbing core 22 circulates the heating medium or the cooling medium therein to exchange heat between the heating medium or the cooling medium and the adsorbent 21. The temperature of the medium flowing inside the adsorbent 21 is higher than the temperature of the adsorbent 21. When the temperature of the adsorbent 21 is high, it functions as a waste heat donating unit that gives the adsorbent 21 waste heat. It is a heat exchanger functioning as a means.

  Next, as shown in FIG. 2, the evaporative heat exchanger 30 is provided with a plurality of flat tubes 34 in which the refrigerant (water in this embodiment) flows in the vertical direction (vertical direction). Between each tube 34, a wave-like fin 35 that promotes heat exchange between the refrigerant and the air is disposed, and heat exchange pipes that exchange heat between the refrigerant and the air by the fin 35 and the tube 34 are arranged in parallel. The core part 33 arrange | positioned in is formed.

  A pair of header tanks 31 and 32 that extend in a direction (horizontal direction) perpendicular to the vertical direction of the tube 34 and communicate with the plurality of tubes 34 are disposed on both ends of the tube 34. The upper header tank 31 is provided with a connecting pipe 36, and the lower header tank 32 is provided with a heating pipe 37.

  The connecting pipe 36 is a connecting pipe for communicating the adsorber 20 and the evaporative heat exchanger 30. On the other hand, the heating tube 37 is a tube in which a concave and convex portion 37a is formed on the outer surface on the side accommodated in the header tank 32. The convex portion 37a is disposed in the header tank 32 and heated inside. The medium is circulated to exchange heat with the refrigerant sealed in the lower header tank 32.

  An open / close valve 39 that opens and closes communication between the adsorber 20 and the evaporative heat exchanger 30 is provided in the middle of the connecting pipe 36. Further, a predetermined amount of refrigerant (in this embodiment, water) is sealed inside the evaporative heat exchanger 30 and kept in a substantially vacuum state.

  The switching valves 41 and 42 are switches for switching whether the heating medium flowing out from the engine 50 is circulated to the adsorber 20 side or the cooling medium radiated by the radiator 40 is circulated to the adsorber 20 side. It is a valve. Incidentally, in FIG. 1, the cooling medium radiated by the radiator 40 is switched so as to flow to the adsorber 20.

  The hot water valve 51 is an open / close valve that opens and closes the flow path of the heating medium that flows through the heating pipe 37. Note that when the hot water valve 51 is opened, the on-off valve 39 is opened. Here, in order to reduce heat loss, it is desirable to switch the switching valves 41 and 42 so that the heating medium flowing out from the engine 50 flows through the heating pipe 37.

  In FIG. 1, the radiator that cools the cooling water flowing out from the engine 50, the bypass circuit that bypasses the cooling water flowing out from the engine 50 to the radiator and returns to the engine 50, and the amount of cooling water that flows through the bypass circuit are adjusted. A flow control valve such as a thermostat is omitted.

  Among the above components, the on-off valve 39, the switching valves 41 and 42, the circulation pumps 43 and 53, the hot water valve 51 and the like are controlled by an electronic controller for an air conditioner (not shown). Control is performed based on detection signals from air conditioning sensors such as an inside air temperature sensor and an outside air temperature sensor, and operation signals from the operation panel.

  Next, the characteristic operation of the air conditioning apparatus having the above configuration will be described with reference to FIGS. 1 and 3 to 5. FIG. 1 shows an operation mode of the adsorption refrigeration apparatus 100 in a cooling mode (which may be an adsorption mode) as an adsorption process, which is an operation mode in an excessive state such as cool-down, and at this time, the refrigeration cycle side also operates. Therefore, the air cooled by the cooling heat exchanger 12 is further cooled by the evaporative heat exchanger 30.

  Specifically, as shown in FIG. 1, the on-off valve 39 is opened, the hot water valve 51 is closed, and the switching valves 41 and 42 are switched in the flow direction in which the cooling medium flows to the adsorber 20 side. Then, by operating the circulation pump 43, the cooling medium cooled to the outside air temperature by the radiator 40 circulates in the adsorption core 22.

  As a result, the adsorbent 21 is cooled by the cooling medium, thereby adsorbing water vapor from the evaporative heat exchanger 30. The adsorbent 21 adsorbs water vapor to reduce the pressure in the evaporative liquefaction heat exchanger 30, so that the enclosed liquid-phase refrigerant boils.

  At this time, since the liquid-phase refrigerant in the header tank 32 disposed below is rolled up by boiling, an effect of wetting the inner surface of the tube 34 can be expected, and the entire surface of the core portion 33 absorbs evaporation latent heat. It is possible. Therefore, the air cooled by the cooling heat exchanger 12 can be further cooled.

  As described above, since the refrigeration capacity is obtained by using the latent heat of vaporization of the liquid-phase refrigerant due to the adsorption action, a large amount of refrigerant can be sealed because a large refrigeration capacity can be obtained even with a small amount of refrigerant. Even if it is not, sufficient refrigeration capacity can be obtained.

  Then, after a predetermined time has elapsed, a desorption mode that is a desorption process for regenerating the adsorbent 21 is executed. Specifically, as shown in FIG. 3, the on-off valve 39 remains open, the hot water valve 51 remains closed, and the switching valves 41 and 42 are switched in the flow direction in which the heating medium flows to the adsorber 20 side. . And the heating medium which distribute | circulated the engine 50 distribute | circulates to the adsorption | suction core 22 by operating the circulation pump 53. FIG.

  Thereby, the water vapor adsorbed on the adsorbent 21 is desorbed from the adsorbent 21 when the adsorbent 21 is heated by the heating medium. The desorbed water vapor is liquefied by the air in the evaporative heat exchanger 30 and condensed into a liquid phase refrigerant. This desorption mode is preferably executed when there is a sufficient cooling capacity after the cool-down, for example, when the air-conditioning state in the passenger compartment is stable. Further, the engine 50 may be executed when the engine 50 immediately after being stopped is in a high temperature state.

  By the way, in this embodiment, immediately after performing desorption mode, it sets so that the cool storage mode which is a cool storage process which reduces the heat capacity of the adsorption machine 20 whole may be performed. Specifically, as shown in FIG. 4, immediately after the end of the desorption mode (after a predetermined time has elapsed), the on-off valve 39 is closed, and the switching valves 41 and 42 are flow directions in which the cooling medium flows to the adsorber 20 side. And the circulation pump 43 is operated for a predetermined time, and then the circulation pump 43 is stopped.

  Thereby, the adsorbent 21 is cooled by the circulation of the cooling medium to the adsorption core 22, and the entire adsorber 20 is cooled to the outside air temperature and the heat capacity is removed. According to this, the cooling mode of the next step can be quickly started.

  Next, a heating mode that is a heating step that is a feature of the present invention will be described. Specifically, as shown in FIG. 5, the communication between the evaporative liquefaction heat exchanger 30 and the adsorber 20 is cut off, and the heating medium is circulated through the evaporative liquefaction heat exchanger 30, so that the cooling heat exchanger 12 The cooled air is heated.

  More specifically, the on-off valve 39 is closed, the hot water valve 51 is opened, the circulation pump 43 is stopped, and the switching valves 41 and 42 are switched in the flow direction in which the adsorber 20 and the radiator 40 communicate with each other. Then, by operating the circulation pump 53, the heating medium flows through the heating pipe 37.

  Thereby, the refrigerant | coolant in a header tank arrange | positioned below with the heating pipe 37 and a heating medium are heat-exchanged, and a refrigerant | coolant vaporizes. This vaporized water vapor is heat-exchanged with air in the core portion 34 to be liquefied and condensed into the header tank.

  That is, when the refrigerant is heated by the heating pipe 37, the saturation balance of the gas-liquid two phases is lost at the interface of the refrigerant, and water molecules jump out upward as a gas, and this gas is cooled by external air and liquefied and liquefied downward by gravity. A heat siphon that drops and is heated and vaporized downward is continuously repeated to obtain a heating effect.

  Accordingly, the refrigerant is vaporized by the heating medium, and further, the air cooled by the cooling heat exchanger 12 is heated using the heat of condensation when the refrigerant is liquefied as a heat source. At this time, if the refrigeration cycle side is stopped, the evaporative heat exchanger 30 can provide a heating effect.

  In the present embodiment, the circulation pump 53 for pumping the heating medium is provided. However, the present invention is not limited to this, and when applied to a vehicle, a mechanical pump driven by the engine 50 may be used. .

  According to the cooling and heating apparatus according to the first embodiment described above, when the evaporative heat exchanger 30 communicates with the adsorber 20, the latent heat of evaporation when the refrigerant evaporates in the evaporative heat exchanger 30 is used as a cold heat source. The air cooled by the cooling heat exchanger 12 is further cooled.

  Furthermore, when the communication between the evaporative liquefaction heat exchanger 30 and the adsorber 20 is cut off and a heating medium is circulated through the evaporative liquefaction heat exchanger 30, the evaporative heat exchanger 30 vaporizes the refrigerant. By using the heat of condensation at the time of liquefaction as a heat source, the air cooled by the cooling heat exchanger 12 is heated so that the evaporative liquefied heat exchanger 30 having a cooling and heating function can be used as the cooling heat exchanger. It can be arranged downstream of the 12 air flows.

  Thereby, compared with the conventional system which further cools the refrigerant | coolant evaporated with the heat exchanger 12 for air_conditioning | cooling, the heat loss of heat exchange can be reduced by comprising the heat exchanger separately, and an air conditioning apparatus The cooling capacity can be improved. Moreover, the heating medium circulated through the adsorber 20 can be circulated through the evaporative heat exchanger 30 to have a heating function.

  That is, as an alternative to the conventional heater core, the evaporative heat exchanger 30 can be disposed on the downstream side of the air flow of the cooling heat exchanger 12. As a result, the adsorption refrigeration apparatus 100 can be added to the conventional air conditioning duct 11. Since the heater core is generally configured to heat the air by heating the heating medium and air, the heating medium can be used in the evaporative heat exchanger 30 as it is.

  The evaporative liquefier heat exchanger 30 has a plurality of heat exchange pipes composed of a pair of header tanks 31 and 32 extending in the horizontal direction, tubes 34 and fins 35 connected at both ends between the tanks 31 and 32. A header tank 31 arranged in parallel is formed, and a header tank 31 disposed above is formed so as to communicate with the adsorber 20, and is further enclosed in a header tank 32 disposed below. By forming the refrigerant and the heating medium so as to exchange heat, it is possible to form a cooling function for evaporating the refrigerant by the adsorbing action by communicating the refrigerant enclosed inside with the adsorber 20. Moreover, the heating function which heats a refrigerant | coolant with a heating medium can be formed. Thereby, the cooling and heating functions can be compatible with one heat exchanger.

  Further, after the desorption mode in which the adsorber 20 is heated by the heating medium, the on-off valve 39 is closed, and the adsorbent is maintained in the cold storage state by circulating the cooling medium through the adsorber 20. As a result, when switched to the adsorption mode, it is affected by the heat capacity of the adsorbent 21, the refrigerant, the adsorber 20, the evaporative liquefaction heat exchanger 30, and the connecting members connecting them, which are heated in the desorption mode. There is no.

  Further, the evaporative heat exchanger 30 is provided with a heating pipe 37 in the form of a tube in a header tank 32 disposed below, and heat is exchanged between the refrigerant and the heating medium. Thus, the heating function can be formed by a heat siphon in which the refrigerant is heated by the heating pipe 37 provided below to vaporize the water vapor and the water vapor is heat-exchanged with the air and returned to the water.

  In addition, since the outer surface of the heating tube 37 is formed in a concavo-convex shape, the heat transfer area to the refrigerant side can be easily expanded by forming the concavo-convex shape in comparison with a flat surface. Further, the heating medium uses waste heat of the engine 50 and a heat engine having a radiator for cooling the cooling water of the engine, so that the desorption action of the adsorber 20 and the evaporative liquefaction heat exchanger 30 are obtained. The waste heat of the heat engine can be used effectively as a heat source.

(Second Embodiment)
In the first embodiment described above, the outer surface of the heating tube 37 disposed in the evaporative heat exchanger 30 is formed in an uneven shape. However, the present invention is not limited to this, and specifically, as shown in FIG. In addition, the heat transfer area may be increased by integrally forming a plurality of fins 37b so as to protrude outwardly from the outer surface of the heating tube 37. According to this, the heat transfer area to the refrigerant side can be more easily expanded than the uneven shape.

  In the above embodiment, the heating pipe 32 is disposed in the header tank 32 disposed below to exchange heat between the refrigerant and the heating medium. You may comprise so that it may heat.

  Specifically, as shown in FIG. 7, internal fins 32a for expanding the heat transfer area are provided on the inner surface of the header tank 32 disposed below, and the lower surface of the header tank 32 and the heating medium are heated. A heating tube 37 is formed to be replaced. In the present embodiment, the heating tube 37 is formed so as to contact the lower surface of the header tank 32, but it may be a side surface.

  In addition, as shown in FIG. 8, a porous body 34 a that sucks a refrigerant made of a ceramic material may be disposed on the inner surface of the tube 34. According to this, in the heat exchange between the refrigerant and the air, the suction of the refrigerant reaches the entire surface of the tube 34 by the porous body 34a, so that the refrigerant can be efficiently evaporated.

(Other embodiments)
In the above embodiment, the engine cooling water from the engine 50 is used as a heating medium and is circulated to the adsorber 20, and the radiator 40 is provided and adsorbed using the cooling medium cooled to a temperature corresponding to the outside air temperature. However, the present invention is not limited to this, and the engine coolant from the engine 50 may be circulated to the adsorber 20 using a radiator that cools the engine coolant.

  Specifically, as shown in FIG. 9, a radiator 40 a mounted on the vehicle is disposed upstream of the adsorber 20. And the cooling mode which is an adsorption | suction process is performed at the time of the cool-down immediately after engine 50 start-up. More specifically, the on-off valve 39 is opened and the circulating pump 53 is operated with the hot water valve 51 closed.

  As a result, the engine cooling water from the radiator 40a flows through the adsorption core 22. At this time, since the engine 50 is immediately after starting, the cooling water temperature is about the outside air temperature. Therefore, the cooling medium is circulated through the adsorption core 22. Thereby, in this case, the evaporative heat exchanger 30 can form a cooling function for evaporating the refrigerant by the adsorption action in the adsorber 20.

  Then, the desorption mode is executed when there is a sufficient cooling capacity after the cool-down or when the engine 50 immediately after the engine 50 is stopped is at a high temperature. According to this, the hot water of the high temperature from the radiator 40a can distribute | circulate to the adsorption | suction core 22 to the adsorber 20, and the adsorption agent 21 can be desorbed. According to this, the heat radiator 40, the switching valves 41 and 42, and the circulation pump 42 can be made unnecessary.

  Moreover, in the above embodiment, although this invention was applied to the vehicle air conditioner, you may make it apply not only to this but to a household or business use air conditioner. In addition, the heating medium is configured to be taken in from the cooling water circuit of the engine 50 and the radiator 40a. However, the present invention is not limited to this. Water may be used as a heat source.

It is a schematic diagram which shows the whole structure of the air conditioning apparatus in 1st Embodiment of this invention. It is a front view which shows the whole structure of the evaporation liquid heat exchanger 30 in 1st Embodiment of this invention. 2 is a schematic diagram showing a circulation path of a heating medium in a desorption mode of the adsorption refrigeration apparatus 100. FIG. 3 is a schematic diagram showing a circulation path of a cooling medium in a cold storage mode of the adsorption refrigeration apparatus 100. FIG. 3 is a schematic diagram illustrating a circulation path of a heating medium in a heating mode of the adsorption refrigeration apparatus 100. FIG. It is a front view which shows the whole structure of the evaporation liquid heat exchanger 30 in 2nd Embodiment of this invention. It is a front view which shows the whole structure of the evaporation liquid heat exchanger 30 in the modification 1 of 2nd Embodiment of this invention. It is a front view which shows the whole structure of the evaporation liquid heat exchanger 30 in the modification 2 of 2nd Embodiment of this invention. It is a schematic diagram which shows the whole structure of the air conditioning apparatus in other embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Air-conditioning duct 12 ... Heat exchanger for cooling 20 ... Adsorber 30 ... Evaporative heat exchanger 31, 32 ... Header tank 32a ... Internal fin 33 ... Core part 34 ... Tube 34a ... Porous body 35 ... Fin 37 ... Heating Pipe 37b ... Fin 40a ... Radiator 50 ... Engine (Liquid-cooled internal combustion engine)
100: Adsorption refrigeration system

Claims (9)

An air conditioning duct (11) forming an air passage;
In a cooling / heating device comprising a cooling heat exchanger (12) for cooling the air flowing in the air conditioning duct (11),
An adsorber (20) for adsorbing the refrigerant by filling the adsorbent therein and desorbing the refrigerant by being heated with a heating medium and being cooled with a cooling medium;
The adsorber (20) has an evaporating liquefied heat exchanger (30) that evaporates the refrigerant when it adsorbs the refrigerant and is vaporized by being heated by a heating medium. An adsorption refrigeration apparatus (100) is provided that evaporates the refrigerant by utilizing the action of adsorbing the refrigerant, and exhibits the refrigerating capacity by the latent heat of evaporation.
The adsorption refrigeration apparatus (100) is configured so that when the evaporative heat exchanger (30) communicates with the adsorber (20), the refrigerant evaporates in the evaporative heat exchanger (30). Using the latent heat of evaporation as a cooling source, the air cooled by the cooling heat exchanger (12) is further cooled,
When the evaporative liquefaction heat exchanger (30) and the adsorber (20) are disconnected from each other and a heating medium is circulated through the evaporative liquefaction heat exchanger (30), the evaporative liquefaction heat exchanger (30 ), And the air cooled by the cooling heat exchanger (12) is heated by using the heat of condensation when the refrigerant is vaporized and the refrigerant is liquefied as a heat source. .   The evaporative liquefied heat exchanger (30) includes a pair of header tanks (31, 32) extending in the horizontal direction and a tube in which both ends communicate with each other (31, 32). 34) and a core portion (33) in which a plurality of heat exchange pipes composed of fins (35) are arranged in parallel, and the header tank (31) disposed above is disposed in the adsorber ( 20), and is formed so as to exchange heat between the refrigerant enclosed in the header tank (32) disposed below and the heating medium. The air conditioning apparatus as described.   The adsorption refrigeration apparatus (100) blocks communication between the evaporative heat exchanger (30) and the adsorber (20) after a desorption process in which the adsorber (20) is heated by a heating medium. The cooling / heating apparatus according to claim 1 or 2, wherein a cooling medium is circulated through the adsorber (20) so that the adsorbent maintains a cold storage state. A heating tube (37) that is formed in a tube shape and in which a heating medium flows is provided,
The evaporative liquefaction heat exchanger (30) is characterized in that the heating pipe (37) is disposed in the header tank (32) disposed below to exchange heat between the refrigerant and the heating medium. The air conditioning apparatus of Claim 2.   The said heating pipe | tube (37) has the outer surface formed in uneven | corrugated shape, The air conditioner of Claim 4 characterized by the above-mentioned.   The said heating pipe | tube (37) formed the fin (37b) for expanding a heat-transfer area in the outer surface, The air conditioning apparatus of Claim 4 characterized by the above-mentioned.   The evaporative liquefied heat exchanger (30) is provided with an internal fin (32a) for expanding a heat transfer area on the inner surface of the header tank (32) disposed below, and the header tank (32) The air conditioning apparatus according to claim 2, wherein the outer surface and the heating medium are formed so as to exchange heat.   The evaporative liquefied heat exchanger (30) is provided with a porous body (34a) for sucking refrigerant into the inner surface of the tube (34). The air conditioning apparatus as described in any one of Claims. The adsorber (20), the liquid-cooled internal combustion engine (50), and the radiator (40a) are connected in series by a pipe,
The air conditioner according to any one of claims 1 to 8, wherein the adsorber (20) is disposed on the downstream side of the radiator (40a).

Images