JP2002254925A - Adsorption type refrigerating machine for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adsorption type refrigerating machine for vehicle capable of raising the temperature of coolant for a water-cooled engine during the idling operation, etc., and improving the refrigerating capacity by controlling the temperature of the coolant distributed to a radiator. SOLUTION: This adsorption type refrigerating machine for vehicle applied to a vehicle having the radiator 210 for cooling the coolant of the water-cooled engine 200 comprises a refrigerating machine body 110 including an adsorber which receives the coolant from the radiator 210 side, and demonstrates the refrigerating capacity by sealing the adsorbent Si and the liquid refrigerant and an outdoor appliance 120 for cooling the coolant circulating the adsorber. A cooling control means of the coolant distributed from the water-cooled engine 200 to the radiator 210 to cool the engine is cooling-controlled so that the temperature TW of the coolant is higher when the engine speed is lower than the predetermined value than when the engine speed is higher than the predetermined value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular adsorption refrigerator applied to a vehicle having a liquid-cooled internal combustion engine (water-cooled engine), and more particularly to cooling of a cooling liquid for a liquid-cooled internal combustion engine. Regarding control.

[0002]

2. Description of the Related Art As is well known, an adsorption type refrigerator obtains a refrigerating capacity by evaporating a refrigerant in an adsorber maintained at a low pressure (substantially vacuum), and also uses the evaporated refrigerant (a vapor refrigerant). By adsorbing with the adsorbent, the refrigerant is continuously evaporated to maintain the refrigerating capacity.

When the adsorbing capacity of the adsorbent approaches a saturated state and the adsorbing capacity decreases, the adsorbed refrigerant is heated to desorb (regenerate) the adsorbed refrigerant and evaporate the refrigerant again. To obtain refrigeration capacity. That is, in the adsorption refrigerator, the heat capacity corresponding to the refrigeration capacity is absorbed to generate the refrigeration capacity. Incidentally, since the coefficient of performance (refrigeration capacity / the amount of heat applied to the adsorbent) of a general adsorption refrigerator using water as a refrigerant and silica gel as an adsorbent is about 0.5, a general adsorption refrigerator is used. In this case, about 2 (W) of heat is consumed to exhibit the refrigeration capacity of 1 (W).

Therefore, for example, Japanese Patent Application Laid-Open No. 2000-17737
In the invention described in Japanese Patent Publication No. 4 (JP-A) No. 4, an adsorption-type refrigerator for a vehicle is disclosed, in which the adsorption-type refrigerator is operated by using the waste heat that has been radiated from the water-cooled engine to the atmosphere, thereby saving power. ing.

[0005] In the above publication, when two adsorbers are used and one adsorber is in an adsorption process of freezing by the heat of evaporation when cooling the adsorbent and adsorbing water, the other adsorber adsorbs water. A desorption step of cooling and condensing water vapor released by heating the agent is performed, and after a predetermined time elapses, freezing is continued by replacing the adsorption and desorption steps.

[0006] Each of the adsorbers, one of which performs an adsorption step and the other of which performs a desorption step, is connected to a heat exchanger outside the vehicle compartment and adsorbs a coolant which has been heat-exchanged with the atmosphere (air outside the vehicle compartment). It circulates inside. The two adsorbers are connected to the coolant circuit of the water-cooled engine, and each adsorber utilizes the waste heat of the water-cooled engine during the desorption stroke.

[0007]

However, according to the above-mentioned publication, during idling operation when the vehicle is stopped, the traveling wind does not hit the heat exchanger outside the vehicle compartment, and the heat from the water-cooled engine is additionally generated. Since the temperature of the cooling air rises due to the wraparound, the cooling performance of the heat exchanger outside the vehicle compartment decreases. As a result, the adsorbent cooling temperature and the condensing temperature of the heat-exchanged cooling liquid increase, and the refrigeration capacity decreases.

That is, as shown in FIG. 9, if the desorption temperature (water temperature of a water-cooled engine) is 85 ° C. and the adsorption temperature (evaporation temperature) is 15 ° C., as shown in FIG. Sometimes, the running air hits the outside heat exchanger and the cooling performance is sufficient because the cooling performance is sufficient, and the coolant temperature is 35 ° C. At this time, desorption is at point A1 and adsorption is at point B1. When the cooling performance of the heat exchanger outside the vehicle decreases and the coolant temperature rises to 45 ° C., the desorption becomes the C1 point and the adsorption becomes the D1 point, and the difference between the adsorption and desorption moisture adsorption rates is 35 ° C. It becomes smaller compared to.

Since the refrigerating capacity of an adsorption type refrigerator is proportional to the difference between the water adsorption rate and the amount of adsorbent, the adsorber having the same amount of adsorbent has a low cooling performance of the heat exchanger outside the vehicle compartment. There is a problem that the refrigeration capacity decreases as the temperature decreases.

Therefore, in order to improve the refrigeration capacity during idling operation, the operating point C1 at the time of desorption is preferably shifted to the low humidity side. That is, the desorption temperature is, for example, 90 ° C.
When it is set to a high level, the water adsorption rate at the time of desorption becomes higher than that shown in FIG.
One point is to improve the refrigeration capacity.

Therefore, the water temperature of the water-cooled engine may be raised. However, in the case of a general water-cooled engine, the maximum temperature (for example, about 105 ° C.) of the water temperature of the water-cooled engine during high-load operation such as high-speed operation or climbing output is required. ), A thermostat is provided on the coolant outlet side of the water-cooled engine, and based on the set temperature of the thermostat, the thermostat is circulated to the radiator side or detoured around the radiator to return to the water-cooled engine side. Since the temperature of the coolant is controlled so as to be usually about 85 ° C., it is difficult to simply increase the set temperature of the thermostat by about 10 ° C.

In view of the above, an object of the present invention is to provide
It is an object of the present invention to provide an adsorption refrigerator for a vehicle in which the temperature of a coolant flowing through a radiator is controlled to increase the temperature of a coolant of a water-cooled engine during idling operation, thereby improving the refrigerating capacity.

[0013]

In order to achieve the above object, the technical means described in claims 1 to 6 are adopted. That is, according to the first aspect of the present invention, the liquid-cooled internal combustion engine (200) and the liquid-cooled internal combustion engine (200)
A chiller for a vehicle, which is applied to a vehicle having a radiator (210) for cooling the coolant, receives a coolant from the radiator (210), adsorbs a vapor refrigerant, and is heated. The adsorbent (Si) and the liquid refrigerant that desorb the adsorbed vapor refrigerant and the liquid refrigerant are enclosed therein, and the adsorbers (111, 112) exhibiting a refrigerating capacity, and the cooling liquid circulating in the adsorbers (111, 112) An external heat exchanger (120) for cooling the radiator (21).
0), the cooling control means of the cooling liquid which flows from the liquid-cooled internal combustion engine (200) and cools the liquid-cooled internal combustion engine (2) more than when the rotation speed of the liquid-cooled internal combustion engine (200) is higher than a predetermined value.
The cooling control is performed such that the temperature (T _W ) of the cooling liquid at the outlet side of the liquid-cooled internal combustion engine (200) becomes higher when the rotation speed of (00) is lower than the predetermined value.

According to the first aspect of the present invention, when the rotation speed of the liquid-cooled internal combustion engine (200) is lower than the predetermined value, than when the rotation speed of the liquid-cooled internal combustion engine (200) is higher than the predetermined value. Is controlled such that the temperature (T _W ) of the coolant on the outlet side of the liquid-cooled internal combustion engine (200) becomes higher,
For example, when the rotation speed of the liquid-cooled internal combustion engine (200) is low, such as during idling operation or low-speed running, the cooling performance of the heat exchanger (120) outside the vehicle interior is reduced. Since the temperature (T _W ) of the coolant on the outlet side can be increased, the temperature of the coolant circulating in the adsorbers (111, 112) increases, and the water adsorbed to the lower humidity side in the desorption process. Thus, the refrigerating capacity can be improved by obtaining a large difference from the water adsorption rate at the time of adsorption.

Further, by performing different cooling control on the temperature (T _W ) of the cooling liquid in accordance with the rotation speed of the liquid-cooled internal combustion engine (200), the cooling can be performed irrespective of the rotation speed in the conventionally known thermostat. Since the cooling was controlled by the set temperature due to the rise in the temperature of the liquid, it was difficult to increase the temperature (T _W ) of the cooling liquid only when the rotational speed was low. Is set in advance, and cooling control of the temperature (T _W ) of the cooling liquid can be performed so as to detect the rotation speed, the current temperature of the cooling liquid, and the like, and to control the flow rate flowing to the radiator (210).

In a conventional thermostat, the temperature (T _W ) of the coolant is generally set to about 85 ° C., and the cooling of the liquid-cooled internal combustion engine (200) is controlled.
In the present invention, when the engine load is large, such as when climbing a hill or traveling at high speed, the control is performed at 85 ° C., which is the same as that of the thermostat. By doing
When the engine speed is low, the engine load is low, so that even if the temperature of the coolant is set higher than in the past, the temperature reaches the limit temperature (for example, 105 ° C.) and does not cause overheating.

When the engine load is large, such as when climbing a hill or traveling at high speed, the temperature of the coolant is 85 ° C., which is equivalent to the control water temperature of a conventionally known thermostat. The rise does not cause overheating.

According to the second aspect of the present invention, a vehicle adsorption system applied to a vehicle having a liquid-cooled internal combustion engine (200) and a radiator (210) for cooling a coolant of the liquid-cooled internal combustion engine (200). Type refrigerator having a radiator (21
Adsorber (Si) and liquid refrigerant, which receive the cooling liquid from the 0) side and adsorb the vapor refrigerant, desorb the vapor refrigerant adsorbed by being heated, and enclose a liquid refrigerant, thereby exhibiting a refrigerating ability. (111, 112) and this adsorber (11
1, 112) for cooling the coolant circulating in the inside of the vehicle, and a cooling control unit for cooling the coolant to be cooled by flowing from the liquid-cooled internal combustion engine (200) to the radiator (210). , the outer heat exchanger (120) temperature at the outlet side of the cooling fluid (T _O) is the outer heat exchanger than when lower than the predetermined value (120) temperature at the outlet side of the cooling fluid (T _O) is a predetermined value When the temperature is higher, the cooling control is performed so that the temperature (T _W ) of the coolant at the outlet side of the liquid-cooled internal combustion engine (200) becomes higher.

According to the second aspect of the present invention, the temperature (T _W ) of the coolant on the outlet side of the liquid-cooled internal combustion engine (200) is determined by the temperature (T _W ) of the coolant on the outlet side of the outside heat exchanger (120). by T _O) is cooling control so it is higher when higher than the predetermined value, for example, when the low rotational speed, such as during and at low speed idle operation, the outer heat exchanger (12
Since the cooling performance of 0) is reduced, the temperature of the cooling liquid (T _W )
Can be increased, the adsorbers (111, 11
2) The temperature of the coolant circulating inside increases, and the moisture adsorption rate shifted to the low humidity side in the desorption process can be obtained, and the difference with the moisture adsorption rate at the time of adsorption can be greatly increased, thereby improving the refrigeration capacity. I can do it.

Therefore, cooling control is performed to control the temperature (T _W ) of the coolant in accordance with the temperature (T _O ) of the coolant at the outlet side of the heat exchanger (120) outside the vehicle compartment. When (T _O ) is higher than a predetermined value (here, 45 ° C.), the temperature (T _O ) of the coolant is increased (here, 9 ° C.).
5 ° C.), and the temperature (T _O ) of the cooling liquid becomes a predetermined value (here,
When the temperature is lower than 35 ° C.), it is preferable to control the cooling so that the temperature (T _W ) of the cooling liquid is lowered (here, 85 ° C.).

Thus, the same effect as that of the first aspect is obtained.

According to the third aspect of the present invention, a vehicle adsorption system applied to a vehicle having a liquid-cooled internal combustion engine (200) and a radiator (210) for cooling a coolant of the liquid-cooled internal combustion engine (200). Type refrigerator having a radiator (21
Adsorber (Si) and liquid refrigerant, which receive the cooling liquid from the 0) side and adsorb the vapor refrigerant, desorb the vapor refrigerant adsorbed by being heated, and enclose a liquid refrigerant, thereby exhibiting a refrigerating ability. (111, 112) and this adsorber (11
1, 112) for cooling the coolant circulating in the inside of the vehicle, and a cooling control unit for cooling the coolant to be cooled by flowing from the liquid-cooled internal combustion engine (200) to the radiator (210). The difference between the temperature (T _W ) of the coolant on the outlet side of the liquid-cooled internal combustion engine (200) and the temperature (T _O ) of the coolant on the outlet side of the heat exchanger (120) outside the vehicle compartment is constant. It is characterized in that the temperature (T _W ) of the coolant at the outlet side of the liquid-cooled internal combustion engine (200) is controlled to be cooled.

According to the third aspect of the present invention, the temperature (T _W ) of the coolant on the outlet side of the liquid-cooled internal combustion engine (200) and the temperature of the coolant on the outlet side of the heat exchanger (120) outside the vehicle ( By controlling the cooling so that the difference from the temperature _T.sub.O ) becomes constant, for example, when the rotation speed is low during idling operation or low-speed running, the temperature of the coolant at the outlet side of the heat exchanger (120) outside the vehicle compartment is reduced. The temperature of the coolant (T _W ) is increased by increasing (T _O ).
, The temperature of the coolant circulating in the adsorbers (111, 112) increases, and the moisture adsorption rate shifted to the low humidity side in the desorption process is obtained, and the difference from the moisture adsorption rate during adsorption is obtained. , The refrigerating capacity can be improved.

[0024] The invention according to claim 4 is characterized in that the cooling control means controls the flow rate through which the radiator (210) flows.

According to the fourth aspect of the present invention, the flow rate of the radiator (210) is controlled, for example, by the rotation speed, the temperature (T _W ) of the coolant at the outlet side of the liquid-cooled internal combustion engine (200), and the heat outside the vehicle compartment. exchanger (120) temperature at the outlet side of the cooling fluid (T _O)
By performing the cooling control to change the flow rate in accordance with the above, the cooling control can be performed to increase the temperature (T _W ) of the cooling liquid during the idling operation.

According to the fifth aspect of the present invention, the cooling control means uses the flow rate adjusting means (220) for controlling the ratio between the flow rate for flowing the radiator (210) and the bypass flow rate for bypassing the radiator (210). It is characterized by controlling by

According to the fifth aspect of the present invention, the flow rate of the radiator (210) and the radiator (21)
Cooling control for switching the flow rate according to, for example, the rotation speed, the engine water temperature (T _E ), the cooling water temperature (T _O ), etc., by using the flow rate adjusting means (220) for controlling the ratio with the bypass flow rate bypassing 0). By doing so, the control water temperature (T _WO ) during idling operation can be controlled to be higher.

[0028] The invention according to claim 6 is characterized in that the cooling control means controls the amount of air passing through the radiator (210) during idling operation.

According to the sixth aspect of the present invention, for example, a shutter or the like is provided on the front surface of the radiator (210) to reduce the amount of air passing through the radiator (210) during idling operation, thereby reducing idling operation. The coolant temperature (T _W ) can be controlled to be higher.

Note that the reference numerals in parentheses of the above means indicate the correspondence with specific means of the embodiment described later.

[0031]

BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment) Hereinafter, an adsorption refrigerator for a vehicle of the present invention is mounted on a vehicle having a water-cooled engine which is a liquid-cooled internal combustion engine using gasoline or light oil as fuel. The first embodiment is applied to an air conditioner and will be described with reference to FIGS.

First, as shown in FIG. 1, reference numeral 200 denotes a traveling water-cooled engine (hereinafter abbreviated as engine).
A radiator 210 performs heat exchange between engine cooling water circulating in the engine 200 and the atmosphere (air outside the vehicle compartment) to cool the engine cooling water. In this embodiment, water obtained by adding ethylene glycol to water is used as engine cooling water.

Reference numeral 220 denotes a flow control valve as flow control means for controlling the ratio of the amount of engine cooling water flowing through the radiator 210 to the amount of bypass bypassing the radiator 210 without flowing. This flow control valve 220
Is an electronic control unit (hereinafter, referred to as an ECU) 3 described below.
00 controls the output of the valve opening signal. When the opening signal is open, the flow control valve 220 is fully opened. When the opening signal is closed, the flow control valve 220 is fully opened. It is closed and the entire flow is circulated so as to bypass the radiator 210, and the temperature of the engine cooling water is controlled by this opening signal. Details of the cooling control means will be described later.

Reference numeral 230 denotes a mechanical water pump that circulates engine cooling water by obtaining a driving force from the engine 200. Reference numeral 240 denotes a radiator fan for blowing air to the radiator 210, and the radiator fan 24
0 is controlled by the ECU 300.

100 (enclosed by a dashed line)
Is a main part of the adsorption refrigerator, and this adsorption refrigerator 10
Numeral 0 denotes a cooling liquid for the refrigerator circulating in the refrigerator main body 110 exhibiting the refrigerating capacity and first and second adsorbers 111 and 112 described later (the same as the engine cooling water in the present embodiment).
Heat exchanger 120 for exchanging heat with the atmosphere to cool the cooling liquid (hereinafter, referred to as an outdoor unit) 120, electric first and second pumps 131 and 132 for circulating the cooling liquid, and an outdoor It has an outdoor unit fan 140 that sends air to the container 120. The outdoor unit 120 is disposed upstream of the radiator 210 in the air flow upstream of the vehicle.

As shown in FIG. 2, the refrigerator main body 110 adsorbs a vapor refrigerant (water vapor) and desorbs the adsorbed vapor refrigerant by being heated (in this embodiment, silica gel). 1) first and second adsorbers 111 in which liquid phase refrigerant (water) is sealed in Si and a substantially vacuum state;
112 and a heat exchange medium cooled in each of the adsorbers 111 and 112 (in this embodiment, the same as the engine cooling water)
Alternatively, it is constituted by first to fourth switching valves 113 to 116 for switching the passage of the heated coolant.

By the way, in this embodiment, the coolant and the heat exchange medium are the same, and as described later,
During the operation of the adsorption chiller 100, the cooling liquid and the heat exchange medium are mixed, so that both will be hereinafter collectively referred to as a cooling liquid. The first and second adsorbers 111 and 112 are heat exchangers having an adsorbent Si adhered to the surface (hereinafter, these heat exchangers are referred to as first and second adsorption cores 111a and 112a).
And a heat exchanger to which the adsorbent Si is not bonded (hereinafter, these heat exchangers are referred to as first and second condensing cores 111b and 112b), and these cores 111a, 112a and 111
b, 112b and a casing 111c for containing a refrigerant,
112c.

The cores 111a, 112a,
The first and second suction cores 111, 111b,
A coolant that exchanges heat with the atmosphere in the air 112 flows through the first and second electric pumps 131 and 132.
It is circulated by.

In FIG. 1, reference numeral 400 denotes an air conditioning unit of a vehicle air conditioner, and reference numeral 410 denotes an air conditioning casing which forms a passage for blown air (conditioned air) blown into the vehicle interior. At the most upstream side of the air conditioning casing 410, an inside air intake port 411 for inhaling air in the vehicle compartment and an outside air intake port 412 for inhaling air outside the vehicle compartment are formed, and both the intake ports 411 and 412 are switched. An inside / outside switching door 420 that opens and closes is provided.

Reference numeral 430 denotes a blower that blows air sucked from both suction ports 411 and 412 toward the vehicle interior.
(The first and second condensing cores 111b and 112b) exchange heat between the cooling liquid and the blown air (cooled body) to cool the blown air (hereinafter, abbreviated as an indoor unit). )
440 is provided.

A heater core (heating means) 450 for heating the blown air by using the engine cooling water as a heat source is disposed downstream of the flow of the blown air from the indoor unit 440. An air mix door (temperature adjusting means) 460 for adjusting the temperature of the blown air by adjusting the amount of air passing through the heater core 450 and the amount of air bypassing the heater core 450 among the air blown out of the heater 440 is provided. I have.

Next, reference numeral 413 denotes a differential opening which communicates with a defroster outlet (not shown) which opens toward a windshield (not shown). Reference numeral 414 denotes a face outlet which opens toward the upper body of the occupant. (Not shown), and a foot opening communicating with a foot outlet (not shown) that opens toward the feet of the 415 occupant. And 471-473 is each opening part 413-41.
5 is a blow mode switching door that opens and closes the air blower 5, the blow mode switch doors 471 to 473, and the air mix door 46.
0, the operation of the inside / outside air switching door 420 and the blower 430
It is controlled by the ECU 300.

The ECU 300 includes an inside air temperature sensor 310 for detecting the temperature inside the vehicle, an outside air temperature sensor 320 for detecting the outside air temperature, and a solar radiation sensor 33 for detecting the amount of solar radiation.
0, a signal from an air conditioning sensor such as an engine water temperature sensor 340 for detecting the temperature of the engine cooling water,
0, a signal from an outlet water temperature sensor 380 for detecting the outlet water temperature of the coolant immediately after flowing through the outdoor unit 210,
Signals from the first blown air temperature sensor 350 for detecting the temperature of the blown air immediately after passing through 0 and the second blown air temperature sensor 360 for detecting the temperature of the blown air after the temperature is adjusted by the air mix door 460. , And a signal from the air conditioning control panel 370 are input.

The air-conditioning control panel 370 is
A blow mode switching switch (not shown) which is manually operated by an occupant, switches between blowing modes, an inside / outside air switching switch (not shown) which switches between an inside air suction state and an outside air suction state, and a vehicle interior temperature desired by the occupant. , A set temperature changeover switch (not shown) for setting the air flow, an air volume changeover switch (not shown) for changing the amount of blown air, and an air conditioner operation switch (not shown) for starting / stopping the air conditioner.

Next, the operation of the adsorption refrigerator 100 will be described. The adsorption type refrigerator 100 includes a first adsorption core 111a.
A first step including a suction step of adsorbing the refrigerant at the second adsorption core 112a, a desorption step of desorbing the refrigerant at the second adsorption core 112a, a desorption step of desorbing the refrigerant at the first adsorption core 111a, and a second adsorption core 112a The second process consists of an adsorption process in which refrigerant is adsorbed by
The process is alternately performed every predetermined time t1 (100 seconds in this embodiment).

Specifically, in the first step, the first to fourth switching valves 113 to 116 are operated as shown by the solid lines in FIG. Thereby, the engine cooling water heated by the engine 200 is circulated from the water pump 230, flows into the second adsorption core 112a through the first switching valve 113, and
The adsorbent Si of the adsorption core 112a is heated to desorb the vapor refrigerant adsorbed by the adsorbent Si of the second adsorption core 112a. On the other hand, since the evaporation of the liquid refrigerant in the first adsorber 111 proceeds, the cooling liquid in the first condensing core 111b is cooled, and the evaporated vapor refrigerant is transferred to the first adsorbing core 11b.
It is adsorbed by the adsorbent Si of 1a.

At this time, since the cooling liquid circulates between the first condensing core 111b and the indoor unit 440 by the first pump 131, the blown air (cooling target) is cooled. On the other hand, since the coolant is circulated between the second condensing core 112b and the first adsorption core 111a and the outdoor unit 120 by the second pump 132, the vapor refrigerant desorbed in the second adsorber 112 is condensed, The heat of adsorption generated by the adsorbent Si of the first adsorption core 111a is absorbed, thereby preventing a decrease in the adsorption capacity.

In the second stroke, the first to fourth switching valves 113
1 to 116 are operated as shown by the broken lines in FIG. 2, so that the operation of the first adsorber 111 in the first step becomes the operation of the second adsorber 112, and the operation of the second adsorber 112 becomes the first adsorption. The operation of the vessel 111 is started. As described above, the adsorption chiller 100 continuously performs the first step and the second step at predetermined time intervals t1 so that the indoor unit 4 is continuously operated.
By circulating the cooling liquid cooled to 40, a refrigeration capacity is exhibited.

Next, the cooling control means for the engine cooling water, which is an essential part of the present invention, will be described with reference to the flowchart shown in FIG. When the start switches (not shown) of the engine 200 and the adsorption type refrigerator 100 are turned on, first, in step 500, the outputs of the air conditioning control panel 370, the sensors 310 to 360, 380 and the engine speed are read into the ECU 300. However, here, the engine speed and the engine water temperature sensor 340
(Hereinafter, this detected temperature is referred to as the engine coolant temperature T _W ).

[0050] Then, in the next step 510, the control water temperature corresponding to the engine rotational speed detected (hereinafter, referred to as the target engine water temperature T _WO) and stored in advance ECU30
0 from a ROM (not shown). As shown in FIG. 4, the target engine water temperature _TWO is set in accordance with the engine speed. For example, when the engine speed is lower than 1000 rpm during idling operation or low-speed running, the target engine water temperature TWO is set. _Assuming that T _WO is 95 ° C. and the engine speed is 1000 to 1500 rpm, 95 to
The temperature gradually decreases to 85 ° C., and is set to 85 ° C. when the engine speed is lower than 1500 rpm.

[0051] Here, although the target engine water temperature T _WO calculated based on the engine rotational speed is not limited thereto, the outlet water temperature sensor 380 for detecting a cooling water temperature of the coolant immediately after flowing through the outdoor unit 120 A detected temperature (hereinafter, this detected temperature is referred to as a cooling water temperature T _O ) may be read, and a target engine water temperature T _WO may be obtained as shown in FIG. 5 based on the cooling water temperature T _O. During idling operation, the cooling water temperature T _O is such that the traveling wind does not hit the outdoor unit 120, and in addition, the cooling air temperature rises due to heat from the engine 200, so that the cooling performance of the outdoor unit 120 decreases. since than when driving the engine rotational speed is higher the higher the cooling water temperature T _O is, for example, when the cooling water temperature T _O is 35 ° C. or less, the target engine water temperature T _WO as 85 ° C., cooling water temperature T _O is 3
Up to 5 to 45 ° C, the temperature gradually increases to 85 to 95 ° C, and 4
When the cooling water temperature T _O is higher than 5 ° C., the temperature is set to 95 ° C. and the cooling water temperature T _O is set higher.

[0052] Then, a determination means for determining whether or not the detected engine coolant temperature T _W at the next step 520 has reached the target engine water temperature T _WO, the target engine water temperature T _WO
Is not reached, the next step 530 is to output "close" of the opening signal to the flow control valve 220. As a result, the flow control valve 220 is fully closed and the entire flow is circulated so as to bypass the radiator 210, and is continued until the detected engine coolant temperature T _W rises to the target engine coolant temperature T _WO .

[0053] When the engine water temperature T _W has reached the target engine water temperature T _WO, in a next step 540, in which the flow control valve 220 outputs the "open" of the opening signal. As a result, the flow control valve 220 is fully opened, the entire flow is circulated to the radiator 210, and the cooling control is performed so as to maintain the target engine water temperature T _WO obtained based on the engine speed or the cooling water temperature T _O of the outdoor unit 120. Things.

According to the cooling control means of the above embodiment,
When the engine load is large and the engine speed is high, such as when the engine 200 is climbing a hill or traveling at high speed, the engine temperature is controlled at 85 ° C., which is the same as the cooling temperature controlled by a commonly used well-known thermostat. For example, when the engine load is small and the engine speed is low, control is performed at a higher 95 ° C.

As a result, during idling operation, the traveling wind does not hit the outdoor unit 120, and
Even when the cooling performance of the outdoor unit 120 decreases and the cooling water temperature T _O is high due to the rise of the cooling air temperature due to the heat flow from 00, the engine water temperature T _W is high and the low humidity desorption is performed in the desorption process. The difference between the water adsorption rate at the time of adsorption and the water adsorption rate is increased, and the refrigerating capacity can be improved.

When the engine speed is low, such as during idling operation or low-speed running, the engine load is low, so even if the engine water temperature T _W is set higher than before, the engine temperature reaches the limit temperature and overheating occurs. I will not invite you.

When the engine load is large, such as when climbing a hill or traveling at high speed, the engine water temperature T _W is 85 ° C., which is equivalent to the control water temperature of a conventionally known thermostat.
Since not cause overheating due to the transient rise in engine coolant temperature T _W of the idling stop, and the running wind in the adsorption chiller 100 side abuts the outdoor unit 120, the cooling performance is not lowered, the cooling water temperature T _O is reduced, and low-humidity desorption can be performed in the desorption step.

[0058] (Second Embodiment) above embodiments, obtains a target engine water temperature T _WO based on the rotational speed or the cooling water temperature T _O at step 510, the cooling water temperature T _O is maintained at the target engine water temperature T _WO So, the flow control valve 2
It has been described cooling control means to output the opening signal to 20, may be adding a predetermined temperature against the target engine water temperature T _WO coolant temperature T _O.

As shown in FIG. 6, at step 500a, the engine coolant temperature T _W and the coolant temperature T _O are read, and at a next step 510a, a predetermined temperature is added to the coolant temperature T _O , and the target engine coolant temperature T _{WO is obtained.} Ask for. In this embodiment,
For example, when the cooling water temperature T _O is 45 ° C. and the predetermined temperature is 50 ° C.
Then, the target engine coolant temperature T _WO is 95 ° C., and if the predetermined temperature is 50 ° C. with respect to the cooling water temperature T _O of 35 ° C., the target engine coolant temperature T _WO is 85 ° C. In other words,
The difference between the engine water temperature T _W and the cooling water temperature T _O is a predetermined temperature of 50 ° C.
Therefore it is constant.

Thus, when the cooling performance of the outdoor unit 120 is reduced, the same effect as that of the first embodiment can be obtained by increasing the engine coolant temperature T _W.

(Third Embodiment) In the above embodiment, in order to cool the engine coolant, the flow control valve 220 is used to output an opening signal to the flow control valve 220 to allow the radiator 210 to flow. The target engine coolant temperature T is switched by switching the flow rate and a bypass flow rate that bypasses the radiator 210.
Has been described cooling control means for cooling control is to maintain the _WO, ON-OFF in response to the rotational speed and the engine water temperature T _W of the engine 200 using a well-known thermostat, and the output control of the radiator fan 140 for
You may output it. As shown in FIGS. 7A and 7B, for example, when the engine speed is higher than 1000 rpm, when the engine coolant temperature T _W reaches 85 ° C., a stop signal is output to the radiator fan 140, and the engine coolant temperature T _W is output. When the temperature reaches 90 ° C., the radiator fan 140 outputs an operation signal. Also, if the engine speed is 1000
When the engine water temperature T _W reaches 95 ° C., a stop signal is output to the radiator fan 140, and when the engine water temperature T _W reaches 100 ° C., the radiator fan 140 outputs an operation signal.

Thus, the engine water temperature T _W can be increased when the engine speed is low, such as during idling operation or low-speed running.

As shown in FIG. 8 (a), on the front side of the radiator 210, a shirt member 211 and a driving means 212 such as an actuator for opening and closing the shirt member 211 are disposed so as to be used for idling operation and low speed operation. The opening / closing control may be output such that the flow rate of air passing through the radiator 210 is smaller than that during traveling when the rotation speed is low during traveling or the like. As a result, when the rotational speed is low, the engine water temperature T _W can be increased.

Further, as shown in FIG. 8B, a door 211a which is opened by the running pressure is disposed in the fan shroud portion 213 of the radiator 210, and the door 211a is closed during idling operation and passes through the radiator 210. It may be possible to reduce the passing air volume. This allows
The engine water temperature T _W can be increased during idling operation.

(Other Embodiments) In the first and second embodiments described above, the cooling control means causes the flow control valve 220 to output the opening signals "open" and "closed". The present invention is not limited thereto, and may be cooling control in which a flow control signal is output in a stepwise manner from a small opening to a large opening so as to control the ratio of the flow rate flowing through the radiator 210 and the bypass flow rate bypassing the radiator 210. Thereby, the flow control valve 2
Can be found the following method which flow control than opening and closing control 20 to maintain the fine-grained target engine water temperature T _WO.

Further, cooling control may be employed in which a flow control signal is output using a flow control valve for controlling the flow so as to vary the flow flowing through the radiator 210 from small to large.

In the above embodiment, the adsorbent S
Although silica gel is used as i, the present invention is not limited to this, and activated carbon, zeolite, activated alumina, or the like may be used as the adsorbent Si. Further, in the above embodiment, water was used as the liquid refrigerant, but the present invention is not limited to this, and other substances can be used as long as they are adsorbed by the adsorbent Si such as alcohol and chlorofluorocarbon. You may.

Further, in the above-described embodiment, the air-mix type air conditioner in which the temperature of the blown air is adjusted by adjusting the flow rate ratio of the cool air and the hot air is used. By adjusting
It may be a reheat type air conditioner for adjusting the temperature of the blown air.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing an overall configuration of a vehicle adsorption refrigerator according to a first embodiment of the present invention.

FIG. 2 is an adsorption refrigerator 1 according to the first embodiment of the present invention.
FIG. 1 is an overall configuration diagram showing the overall configuration of a 00.

FIG. 3 is a flowchart illustrating a control flow of a cooling control unit according to the first embodiment of the present invention.

FIG. 4 shows the engine speed according to the first embodiment of the present invention.
Target engine water temperature T corresponding to _WOCharacteristic diagram showing the relationship with
It is.

FIG. 5 is a characteristic diagram showing a relationship between a cooling water temperature T _O and a target engine water temperature T _WO corresponding to the first embodiment of the present invention.

FIG. 6 is a flowchart illustrating a control flow of a cooling control unit according to a second embodiment of the present invention.

FIG. 7A is a characteristic diagram showing an operation state of the engine water temperature _TWO and the radiator fan 140 when the engine speed is 1000 rpm or less, and FIG. FIG. 7 is a characteristic diagram showing an operation state of engine water temperature _TWO and radiator fan 140 when the number is 1000 rpm or more.

8A is a configuration diagram of a third embodiment of the present invention, in which a shirt 211 is arranged on the front surface of a radiator 210. FIG. 8B is a configuration diagram of a fan shroud 213 of the radiator 210.
1 is a configuration diagram in which a shirt 211 is disposed.

FIG. 9 is a characteristic diagram showing the adsorption characteristics of the adsorption refrigerator.

[Explanation of symbols]

110: refrigerator main body 111: first adsorber (adsorber) 112: second adsorber (adsorber) 120: outdoor unit (external heat exchanger) 200: water-cooled engine (liquid-cooled internal combustion engine) 210: radiator 220: Flow control valve (flow control means) Si: Adsorbent T _O : Cooling water temperature (cooling liquid temperature) T _W : Engine water temperature (cooling liquid temperature)

Claims (6)

[Claims] An adsorption refrigerator for a vehicle applied to a vehicle having a liquid-cooled internal combustion engine (200) and a radiator (210) for cooling a coolant of the liquid-cooled internal combustion engine (200). An adsorbent (Si) and a liquid refrigerant for receiving the cooling liquid from the radiator (210) side, adsorbing the vapor refrigerant, and desorbing the vapor refrigerant adsorbed by being heated, are sealed, and have a refrigerating capacity. Adsorber (111,
112); and an external heat exchanger (120) for cooling the coolant circulating in the adsorbers (111, 112). The liquid-cooled internal combustion engine (20) is provided in the radiator (210).
0), the cooling liquid cooling control means for cooling the liquid-cooled internal combustion engine (200) has a predetermined rotational speed higher than the rotational speed of the liquid-cooled internal combustion engine (200) higher than a predetermined value. When the value is lower than the value, the liquid-cooled internal combustion engine (2
00) An adsorption refrigerator for a vehicle, wherein cooling is controlled so that the temperature (T _W ) of the cooling liquid on the outlet side is increased. 2. An adsorption type refrigerator for a vehicle applied to a vehicle having a liquid-cooled internal combustion engine (200) and a radiator (210) for cooling a coolant of the liquid-cooled internal combustion engine (200). An adsorbent (Si) and a liquid refrigerant, which receive the cooling liquid from the radiator (210) and adsorb the vapor refrigerant, desorb the adsorbed vapor refrigerant by being heated, are sealed, and have a refrigerating capacity. Adsorber (111, 1
12); and an external heat exchanger (120) for cooling the coolant circulating in the adsorbers (111, 112). The liquid-cooled internal combustion engine (20) is provided in the radiator (210).
0), the cooling liquid cooling control means for cooling the liquid coolant from the outside of the vehicle heat exchanger (120) at the outlet side of the heat exchanger outside the vehicle (120) is lower than when the temperature (T _O ) of the liquid coolant is lower than a predetermined value. vessel (120) the temperature of the cooling liquid outlet side (T _O)
Is higher than a predetermined value, the liquid-cooled internal combustion engine (20
0) An adsorption type refrigerator for a vehicle, wherein cooling control is performed so that the temperature (T _W ) of the coolant on the outlet side is increased. 3. An adsorption refrigerator for a vehicle applied to a vehicle having a liquid-cooled internal combustion engine (200) and a radiator (210) for cooling a coolant of the liquid-cooled internal combustion engine (200). An adsorbent (Si) and a liquid refrigerant, which receive the cooling liquid from the radiator (210) and adsorb the vapor refrigerant, desorb the adsorbed vapor refrigerant by being heated, are sealed, and have a refrigerating capacity. Adsorber (111, 1
12); and an external heat exchanger (120) for cooling the coolant circulating in the adsorbers (111, 112). The liquid-cooled internal combustion engine (20) is provided in the radiator (210).
0), the cooling liquid cooling control means for cooling and flowing the cooling liquid includes a temperature (T _W ) of the cooling liquid at an outlet side of the liquid-cooled internal combustion engine (200) and an outlet side of the external heat exchanger (120). A vehicle wherein the temperature (T _W ) of the coolant at the outlet side of the liquid-cooled internal combustion engine (200) is controlled to be cooled such that the difference from the temperature (T _O ) of the coolant is constant. For adsorption refrigerator. 4. The adsorption refrigerator according to claim 1, wherein the cooling control unit controls a flow rate of the radiator (210). 5. The cooling control means determines a flow rate of the radiator (210) and a flow rate of the radiator (21).
The adsorption chiller for a vehicle according to any one of claims 1 to 3, wherein the control is performed by using a flow rate adjusting means (220) for controlling a ratio of the bypass refrigeration flow to 0). . 6. The cooling control means according to claim 1, wherein during idling operation, the amount of air passing through the radiator (210) is controlled to be smaller than during traveling. The adsorption refrigerator according to any one of the preceding claims.