JPH0741365U - In-vehicle refrigerator / freezer - Google Patents

Abstract

(57) [Summary] [Purpose] Drain water due to water droplets and frost adhering to the evaporator is reliably discharged outside while maintaining the refrigeration capacity. [Structure] A drain water discharge means is provided below the evaporator to collect water droplets dropped from the evaporator and discharge the drained water to the outside, so that water droplets may drop on the frozen material to be frozen stored in the cool box. , It is possible to prevent water droplets from staying on the bottom of the cool box. Further, the drain water discharge means is constituted by a drip pan fixed to the back surface of the cool box and having a plurality of ventilation holes having a drain water guide, and a discharge hose communicating the drip pan and the outside of the cool box. Further, water collecting troughs having recessed upper surfaces are provided below the evaporator at predetermined intervals, and baffles are arranged above the water collecting troughs so as to straddle adjacent water collecting troughs.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention is for an in-vehicle system that is composed of a cool box base with a refrigeration cycle installed inside and a cool box that stores the objects to be refrigerated or to be frozen, and the cool box is removable from the cool box base. Freezer and refrigerator.

[0002]

[Prior art]

 A conventional movable on-vehicle refrigerator / freezer is, for example, as disclosed in Japanese Patent Laid-Open No. 4-39585, a refrigeration cycle including a compressor, a condenser, an evaporator, and the like, and a refrigeration cycle internally provided and casters and the like moved. A cool box base that has a mechanism and a cool box that is detachably attached to this cool box base, and an evaporator that extends horizontally is inserted into the cool box when the cool box is installed. This cools the inside of the refrigerator.

[0003]

[Problems to be solved by the device]

 In a conventional on-vehicle refrigerator / freezer, when the evaporator is defrosted, water droplets that have adhered to the fins of the evaporator or water droplets formed by melting frost (drain water) have no means to discharge it outside the cool box. It may fall on the stored items such as food stored in the store or collect on the bottom of the storage, and the accumulated water droplets may freeze, which may worsen the frozen or refrigerated state of the stored items, and There was a problem that the quality of the product deteriorated. In addition, at the end of the freezing / refrigerating control, water droplets and frost adhering to the evaporator will melt and collect on the bottom of the refrigerator, causing a bad odor inside the refrigerator.

In addition, when a drain pan for collecting drain water is arranged, the drain pan impedes the flow of cold air in the cool box compartment, which causes a problem that the freezing and refrigerating capacity in the compartment is reduced. It was

For this reason, the present invention provides a vehicle-mounted freezer-refrigerator capable of reliably discharging drain water due to water droplets or frost adhering to the evaporator while maintaining the freezer-refrigerating capacity. is there.

[0006]

[Means for Solving the Problems]

 Therefore, the invention according to claim 1 is a cool box base in which a refrigeration cycle is installed and an evaporator forming a part of the refrigeration cycle is extended, and the cool box base is detachable. In an on-vehicle refrigerator / freezer having a cool box that stores the evaporator when installed and serves as a cold-freezer, when the cool box is installed, the evaporator is placed below the evaporator that extends into the cool box, and the evaporator is placed below the evaporator. The drain water discharge means is provided for collecting the water droplets dripping from the cool water and discharging it to the outside of the cool box. Further, the invention according to claim 2 has the drain water discharge means having a predetermined inclination. The drip pan fixed to the back of the cool box and the drip pan communicated with the drip pan to cool the drain water collected in the drip pan. And a drain water guide formed so as to cover the ventilation holes, and the drain water hose configured to discharge the water to the outside of the casing. According to the third aspect of the invention, the drain water discharge means is arranged above the evaporator so as to straddle a plurality of water collecting troughs having concave upper surfaces arranged at a predetermined interval and adjacent water collecting troughs. And a discharge hose that communicates the plurality of water collecting gutters with the outside.

[0007]

[Action]

 Therefore, in the device according to the first aspect of the present invention, the drain water discharge means for collecting the water droplets dripping from the evaporator and discharging it to the outside is provided below the evaporator. Frozen Water droplets can be prevented from dripping on the frozen material, and water droplets can be prevented from staying at the bottom of the cool box.

Further, in the invention according to claim 2, a drip pan fixed to the back surface of the cool box and having a plurality of ventilation holes having a drain water guide is connected to the drip pan and the outside of the cool box. The drain water discharge means according to claim 1 is constituted by a discharge hose, and when the cool box is mounted on the cool box base, the drip pan is located below the evaporator, so that water drops dripping from the evaporator are collected. Since the ventilation holes of the drip pan can be collected, the ventilation resistance of cold air can be reduced, and a drain water guide is provided so as to cover the air holes above the water drops. Can be prevented from falling downward from the ventilation hole.

Further, in the invention according to claim 3, water collecting gutters having upper surfaces of recesses are provided below the evaporator at predetermined intervals, and the upper side of the water collecting gutter is arranged so as to straddle adjacent water collecting gutters. I placed a baffle on. As a result, the water drops dripping from the evaporator fall directly into the gutter and are collected, and those that fall between the gutters are collected through the baffle plates to the left and right gutters of the baffle plate and discharged. It is discharged from the pipe to the outside. In addition, the cold air that descends from the evaporator can bypass the baffles and gutters, so that the refrigeration effect can be maintained. By this, the above-mentioned subject can be achieved.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

An on-vehicle refrigerator / freezer 1 shown in FIG. 1 includes a cool box 2 (2a, 2b) for storing refrigerated objects and a cool box base 3 to which at least two cool boxes 2 can be mounted. Composed of and.

The cool box base 3 is formed in an L shape by the side wall portion 3a and the pedestal portion 3b, and has wheels 4 for moving and a stopper 5 for stopping and fixing the lower portion of the pedestal 3b. It is to be loaded on the carrier. A guide rail 6 (6a, 6b) for mounting the cool box 2 is fixed to a side wall portion 3a of the cool box base 3, and an evaporator 8 (8a, 8b) which constitutes a part of a refrigeration cycle described below. ) Is fixed in place.

The guide rail 6 is composed of side rails 61 (61a, 61b), 62 (62a, 62b) and a tip rail 63 (63a, 63b), and both end portions of the tip rail 63. Is provided with a cool box locking mechanism 64. Further, the side rails 61 and 62 are supported by a support pillar 7, and one side portion of the support pillar 7 detects a position of a setting switch 10 that sets the temperature of the cool box 2. 11a, 11b) are attached. A drainage receiver 9 (9a, 9b) is provided on the side wall 3a of the cool box base 3 and communicates with the discharge hose 12.

Inside the cool box base 3, for example, a refrigeration cycle as shown in FIG. 3 is provided and controlled by the control unit 20. This refrigerating cycle is composed of an upper refrigerating cycle and a lower refrigerating cycle, and the cool box 2a arranged on the upper side and the cool box 2b arranged on the lower side can be independently controlled. Is.

The upper refrigeration cycle includes a compressor 21a, an upper condenser 22a that uses half of the shared condenser 22, a dryer 23a, a solenoid valve 24a, a short capillary tube 25a connected in series to this solenoid valve 24a, and this solenoid valve. 24a and a short capillary tube 25a, a hot gas bypass passage constituted by a long capillary tube 26a connected in parallel to a flow channel and an upper evaporator 8a, and further opened by a solenoid valve 27a during defrost control. 31a.

The lower refrigeration cycle includes a compressor 21b, a lower condenser 22b that uses the remaining half of the shared condenser 22, a dryer 23b, a solenoid valve 24b, a short capillary tube 25b connected in series to the solenoid valve 24b, Hot gas that is composed of a long capillary tube 26b and a lower evaporator 8b that are connected in parallel to a flow path that is composed of a solenoid valve 24b and a short capillary tube 25b, and that is opened by a solenoid valve 27b during defrost control. It has a bypass passage 31b.

The control unit 20 has a central processing unit (CPU), a read only memory (ROM), a random access memory (RAM), an input / output port (I / O), a drive circuit, and the like, which are not shown, and is known per se. Of the evaporator temperature signals (T) detected by the evaporator temperature detection sensors 28a and 28b disposed near the evaporators 8a and 8b._E1, T_E2), A temperature signal (T_C1,T_C2), The set temperature signal (SW) from the position detection switches 11a and 11b. ₁ , SW₂), And at least a signal from the operation panel 31 is input and processed by a predetermined program, and then a signal for controlling the compressors 21a, 21b, the condenser blower 30 and the solenoid valves 24a, 24b, 27a, 27b is output. It does.

As shown in FIG. 4, the cool box 2 is composed of a cool box body 41 and a door 42. The cool box body and the door 42 have a heat insulating structure filled with urethane foam resin, for example. The outer and inner surfaces of the cool box body 41 and the door 42 are made of iron plate or synthetic resin material. A packing 43 is attached to the inside of the door 42 to improve the airtightness of the cool box when the door 42 is closed. The temperature setting switch 10 is provided on one side of the cool box body 41, and a lifting handle 44 and a pulling handle 45 are provided on both sides.

An evaporator insertion hole 47 through which the evaporator 8 extends is formed in the back wall 46 of the cool box 2, and a drip pan 50 is attached below the evaporator insertion hole 47. The evaporator insertion hole 47 is provided with an opening / closing lid 48 (see FIG. 6).

As shown in FIGS. 5 (a) and 5 (b), the drip pan 50 has a drain pipe 51 fitted to the back wall 46 of the cool box 2 and a water droplet (dropped toward the drain pipe 51 ( And a bottom portion 52 that is inclined so that drain water) flows. The bottom portion 52 has a central bottom portion 55 that inclines with its width gradually narrowing from the tip toward the drain pipe 51, and both bottom portions 56 and 57 that are in contact with the central bottom portion 55 and incline from the side ends toward the drain pipe 51. Composed of and. Further, as shown in FIG. 5C, the bottom portion 52 of the drip pan 50 has a plurality of ventilation holes 53 formed in a semicircular shape having a circular shape above the bottom portion 52, and the ventilation holes 53. And a drain water guide 54 formed so as to close the upstream side of the drain water. The drain pipe 51 of the drip pan 50 is connected to a drain hole 49 accommodated in the inner wall 46 of the cool box and drains the drain water dropped on the drip pan 50 to the outside. As described above, the drip pan 50, the drain hole 49, the drain receiver 9, and the drain hose 12 are provided as drain water draining means.

As described above, in the refrigerator-freezer having this configuration, as shown in FIG. 6, when the cool box 2 is attached to the cool box base 3, the evaporator 8 is moved from the evaporator insertion hole 47 to the opening / closing lid 48. Push and open to extend inside the cool box 2 and above the drip pan 50 fixed in the cool box. When the cool box 2 is attached, the position of the temperature setting switch 10 provided on the side of the cool box 2 is read by the position detection switch 11, and the inside of the cool box 2 is, for example, cool (chill) or chilled. (CHILLED) or freeze (FREEZE).

As a result, when cool and chilled are set, the solenoid valves 24 (24a, 24b) are opened and the short capillary tubes 25 (25a, 25b) and the long capillary tubes 26 (26a, 26b) are opened. When a freeze passage is set by using a combined refrigerant flow path, the solenoid valve 24 is closed to form a refrigerant passage that uses only the long capillary tube 26, so that the capacity of the refrigeration cycle is largely distributed and the compressor is By controlling 21 (21a, 21b), the temperature inside the cool box compartment is controlled to approach a desired temperature. The target temperature (set temperature) is normally set to + 5 ° C for cool, 0 ° C for chilled, and -18 ° C for frozen.

In the refrigeration cycle configured as described above, when defrosting control is requested, the solenoid valve 27 (27a, 27b) is opened and the hot gas bypass passage 31 (31a, 31b) is opened. The high-temperature and high-pressure gas discharged from the compressor 21 flows to the evaporator 8 via the hot gas bypass passage 31, whereby the evaporator 8 is heated and the frost and ice adhering to the evaporator 8 can be melted.

When the above defrost control is performed, or when the refrigerating / refrigerating control is stopped, the frost attached to the evaporator 8 becomes water drops and drops onto the drip pan 50. The water drops that have fallen on the drip pan 50 are collected as drain water in the drain pipe 51 along the inclination of the drip pan 50, pass through the drain holes 49 from the drain pipe 51, and are discharged to the outside of the cool box 2. The discharged drain water is dropped onto the drain receiver 9 provided on the cool box base 3 and drained to the outside via the drain hose 12. The drain water flowing out from the drain hose 12 may be collected in a basin 31b of the cool box base 3 by arranging a water collecting tub.

As a result, drain water dripping from the evaporator 8 can be prevented from dripping on the refrigerating object to be refrigerated stored in the cool box 2, so that deterioration of the frozen object to be refrigerated can be prevented. It is a thing. Further, since the ventilation hole 53 is formed in the drip pan 50, the passage of the cool air descending from the evaporator 8 can be secured, so that the reduction of the refrigerating and refrigerating capacity by providing the drain water discharge means below the evaporator 8 can be suppressed. It is a thing.

In the above-described embodiment, an example in which the drain water discharge means is provided separately on the cool box side and the cool box base side has been described, but what is shown below in FIGS. 7 and 8 is drain water. The discharging means is provided on the cool box base side.

This embodiment will be described below. The evaporator section 80 protects the evaporator 8 forming a part of the refrigeration cycle, the tip and side portions of the evaporator 8, and a tip cover having a lining attached inside. 81 and the side cover 82.

Below the evaporator 8 of the evaporator portion 80, a plurality of water collecting troughs 83 are arranged at a predetermined interval and extend between the evaporator mounting block 85 and the tip cover 81, and the evaporator mounting block side is lowered. As described above, a plurality of baffles 84 are provided between the water collecting trough 83 and the evaporator 8 so as to bridge over the water collecting trough 83 with inclination at a predetermined angle. It is bridged like a gutter. The water collecting trough 83 is formed to have a U-shaped cross section, and the baffle plate 84 is formed to have an inverted U shape.

Further, a portion of the evaporator mounting block 85 where the water collecting trough 83 is locked is integrally formed with a locking groove for locking the water collecting trough, and drain water flowing through the water collecting trough is drained. Is formed in the evaporator mounting block 85, and a fixing groove 87 for the baffle plate 84 is formed in the evaporator mounting block 85. Further, the discharge hole 86 communicates with a discharge hose 88. A temperature sensor mounting portion 89 for mounting the temperature detection sensor 28 (28a, 28b) is formed in the central portion of the evaporator mounting block 85.

As a result, similarly to the above-described embodiment, when the defrosting control is executed or the freezing / refrigerating control is stopped, water drops generated by melting the frost are dripped from the evaporator 8. Some of the dropped water droplets drop directly on the water collecting trough 83, and some fall on the baffle plate 84. The water drops that have fallen on the water collecting trough 83 reach the discharge hole 86 along the water collecting trough 83, and the water drops that have dropped on the baffle plate 84 slide on the baffle plate 84 and reach the water collecting trough 83. To fall. As a result, all the water drops falling from the evaporator 8 are collected in the water collecting trough 83, and are discharged from the discharge hole 86 to the outside of the cool box through the discharge hose 88. Further, in the case of normal control, the cool air descending from the evaporator 8 passes through the space between the baffle plate 84 and the water collecting trough 83, so that the drain water discharge means is provided below the evaporator so that the refrigerating and refrigerating capacity is reduced. The reduction can be suppressed.

[0031]

[Effect of device]

 Therefore, in the device according to the first aspect of the present invention, by providing the drain water discharge means below the evaporator, the water drop dripping from the evaporator can be discharged to the outside of the cool box at the time of defrost control or stop of the refrigeration control. Therefore, it is possible to prevent deterioration of the quality of the frozen / refrigerated object stored in the cool box caused by the splash of water.

Further, in the invention according to claim 2, the drain water discharge means is constituted by a drip pan arranged in a cool box below the evaporator and a discharge hose, and the drip pan has a plurality of vent holes. By providing the water drop that is dropped from the evaporator, the cool air that descends from the evaporator can be passed, and thus the reduction of the refrigerating and refrigerating capacity caused by providing the drain water discharge means can be suppressed.

Further, in the invention according to claim 3, since the drain water discharge means is constituted by the water collecting gutter and the baffle plate provided under the evaporator and the drain hose, the drain water is dropped from the evaporator. Since water droplets can be collected and the cool air descending from the evaporator can pass between the water collecting trough and the baffle plate, it is possible to suppress the reduction of the refrigerating capacity caused by providing the drain water discharging means.

[Brief description of drawings]

FIG. 1 is a side view of an on-vehicle refrigerator / freezer according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a cool box base of a vehicle-mounted refrigerator / freezer according to a first embodiment of the present invention.

FIG. 3 is a schematic configuration diagram of a refrigeration cycle and a control device of the on-vehicle refrigerator / freezer according to the first embodiment of the present invention.

FIG. 4 is an explanatory perspective view of a cool box.

FIG. 5A is a plan view of the drip pan, and FIG.
[Fig. 3] is a side view of the drip pan, and (c) is an explanatory view in which a part of the ventilation hole is enlarged.

FIG. 6 is a partially cutaway sectional view of the on-vehicle refrigerator / freezer according to the first embodiment of the present invention.

FIG. 7 is a perspective view of a cool box base of a vehicle-mounted refrigerator / freezer according to a second embodiment of the present invention.

8A is a plan view showing an evaporator portion of a second embodiment, FIG. 8B is a sectional view taken along line AA of FIG. 8A, and FIG. 8C is an exploded perspective view of the evaporator portion. Is.

[Explanation of symbols]

 1 In-vehicle refrigerator / freezer 2 (2a, 2b) Cool box 3 Cool box base 8 (8a, 8b) Evaporator 12,88 Drain hose 50 Drip pan 53 Vent hole 54 Drain water guide 80 Evaporator section 83 Water collecting trough 84 Baffle plate 85 Evaporator mounting block

Claims (3)

[Scope of utility model registration request] 1. A cool box base in which a refrigeration cycle is installed, and an evaporator forming a part of the refrigeration cycle is extended, and the cool box base is detachable, and the evaporator is attached when the refrigeration cycle is mounted. In a vehicle-mounted refrigerator-freezer having a cool box that serves as a freezer, when the cool box is attached, it is located below the evaporator that extends into the cool box, and collects water droplets dripping from the evaporator. An on-vehicle freezer-refrigerator comprising drain water discharge means for discharging the cool box outside. 2. The drain water draining means has a predetermined inclination and is fixed to the back of the cool box, and the drip pan communicates with the drip pan to cool the drain water collected in the drip pan. A drain hose for discharging to the outside of the box, wherein the drip pan has a plurality of ventilation holes and a drain water guide formed so as to cover the ventilation holes. The on-vehicle refrigerator / freezer according to 1. 3. The drain water discharge means is disposed above the evaporator so as to straddle a plurality of water collecting troughs having recessed upper surfaces arranged at predetermined intervals and adjacent water collecting troughs. 2. The on-vehicle refrigerator / freezer according to claim 1, which is constituted by a baffle plate and a discharge hose that connects the plurality of water collecting gutters to the outside.