JP2010043760A - Sub-engine type transport refrigerating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sub-engine type transport refrigerating device suppressed in the unit height, filling water by setting a water filling fitting to an appropriate height position all the time during filling of cooling water and suppressing shortage of cooling water and a risk of air inclusion. <P>SOLUTION: In the sub-engine type transport refrigerating device 1, a hose connection part 21 is provided in a lower portion of a cooling channel system of a sub-engine 5, and an extendable and flexible water filling/discharge hose 22 having a capped water filling/discharge fitting 23 provided at the other end is connected to the hose connection part 21. The water filling/discharge fitting 23 is set on the inner face of a front face panel 3A and in the position becoming set height when the front face panel 3A is opened upwardly. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a sub-engine type transport refrigeration apparatus in which a compressor or the like constituting a device on a condensing unit side is driven by an engine dedicated to the refrigeration apparatus.

  In a transport refrigeration system mounted on a refrigeration vehicle, a sub-engine type transport refrigeration system in which a compressor, a condenser fan, and the like are driven by an engine dedicated to the refrigeration system (hereinafter referred to as “sub-engine”) is water-cooled. A diesel engine of the type is often used. In a water-cooled engine, the cooling channel system and the radiator must be filled with engine cooling water, and the water inlet of the engine cooling water is located higher than the cylinder head and radiator of the engine (sub It must be installed at a position higher by α than the highest position in the cooling water channel system of the engine and the radiator, and as a result, the overall height of the unit was high.

Also, in this type of sub-engine, when the internal pressure in the cooling water channel system exceeds the set pressure, the water inlet is opened to release the internal steam, and when the internal pressure becomes negative, the condensed cooling water It is common to provide a reserve tank that returns the water to the cooling water channel system.
Under these circumstances, in water-cooled engines mounted on various vehicles, a water inlet with a cap for injecting cooling water is provided in the upper tank of the radiator via a flexible start-up hose, and a flexible communication hose is provided for this water inlet. A water-cooled engine that communicates with the air vent of the thermostat housing, and is configured to be able to displace the water injection cap to a position above the air vent of the thermostat housing. It has been proposed (see, for example, Patent Document 1).

JP-A-7-19043

  In the water-cooled engine of Patent Document 1, since the water injection base can be displaced to a position above the air vent, the water injection base is not necessarily installed at a position higher than the highest position in the cooling water channel system of the engine and the radiator. Therefore, the restriction that the unit height becomes high depending on the installation position of the water injection cap can be relaxed. However, Patent Document 1 does not disclose any specific configuration for changing and holding the water injection cap at a height and a position where water injection is easy.

  In addition, since a bendable start-up hose is connected to the upper tank of the radiator, it is necessary to provide a separate drainage port to drain the engine cooling water for replacement, etc. There was a problem that the increase was inevitable. Furthermore, in order to provide a reserve tank, it is necessary to connect the reserve tank to the water injection base via a communication pipe, and to install the reserve tank and the water injection base separately, which complicates the configuration and increases the number of parts. There was an inevitable problem.

  The present invention has been made in view of such circumstances, and it is possible to suppress the unit height, and at the time of cooling water injection, the water injection base can always be set to an appropriate height position to inject water, resulting in insufficient cooling water. Another object is to provide a sub-engine-type transport refrigeration system that can reduce the risk of air contamination.

In order to solve the above problems, the sub-engine type transport refrigeration apparatus of the present invention employs the following means.
That is, the sub-engine transport refrigeration apparatus according to the present invention is driven by the water-cooled sub-engine and the sub-engine on a frame whose periphery is covered by a panel including a front panel that can be opened upward. In a sub-engine type transport refrigeration system in which equipment on the condensing unit side including the compressor is mounted, a hose connection portion is provided in a lower part of the cooling water channel system of the sub engine, and the hose connection portion can be expanded and contracted. A water injection / drain hose having a water injection / drainage cap with a cap at the other end, and the water injection / drainage base is an inner surface of the front panel, It is characterized by being installed at a position that becomes a set height when opened upward.

  According to the present invention, a hose connection portion is provided in a lower part of the cooling water channel system of the sub engine, and the hose connection portion is extendable and flexible, and a water injection / drainage cap with a cap is provided at the other end. In addition, the water injection / drain hose is connected to the inner surface of the front panel and is set at a position that is set when the front panel is opened upward. When water is poured into the cooling water system of the sub engine and radiator, the water injection and drainage cap is opened by setting the front panel upward, ie, higher than the highest position in the cooling water system of the sub engine and radiator by α. It can be set at a position to pour water. As a result, the engine cooling water can be reliably filled in the sub-engine and the radiator, and the risk of insufficient cooling water and air contamination can be suppressed. In addition, since it is not necessary to install the water injection / drainage cap at a high position, the overall height of the unit can be lowered. Furthermore, the engine cooling water can be drained as it is through the hose connection part provided in the lower part of the cooling water channel system by removing the water injection / drainage base from the front panel and lowering it. Can be easily performed, and a drain port can be omitted, thereby saving space and reducing costs.

  Furthermore, the sub-engine transport refrigeration apparatus of the present invention is the above-described sub-engine transport refrigeration apparatus, wherein the water injection / drainage base is installed so as to face upward when the front panel is opened upward. It is characterized by being.

  According to the present invention, when the water injection / drainage base is opened upward when the front panel is opened upward, the front panel is opened upward and the cap is removed as it is upward. Cooling water can be poured from the water / drainage cap. Therefore, the cooling water can be easily poured and replenished as before.

  Furthermore, the sub-engine transport refrigeration apparatus of the present invention is characterized in that, in any of the above-described sub-engine transport refrigeration apparatuses, the water injection / drain hose is constituted by a bellows type hose.

  According to the present invention, since the water injection / drainage hose is constituted by the bellows type hose, when the front panel is opened and closed, the bellows type hose freely expands / contracts or bends to follow the opening / closing operation of the front panel. Therefore, even if the other end of the water injection / drainage hose connected to the sub-engine is connected to the front panel via the water injection / drainage cap, there is no hindrance to the opening / closing operation of the front panel. Convenience of drainage can be ensured.

  Furthermore, the sub-engine transport refrigeration apparatus of the present invention is the above-described sub-engine transport refrigeration apparatus, wherein the water injection / drainage base is detachably installed on the inner surface of the front panel via a bracket. It is characterized by.

  According to the present invention, since the water injection / drainage base is detachably installed on the inner surface of the front panel via the bracket, when draining engine cooling water, the water injection / drainage base can be easily removed from the front panel. Can be lowered. As a result, the engine cooling water can be easily drained and replaced.

  Furthermore, the sub-engine transport refrigeration apparatus of the present invention is the above-described sub-engine transport refrigeration apparatus, wherein the water injection / drainage base is integrally provided with a reserve tank, and the reserve tank is It is connected to the water injection / drain hose through a pressure valve that opens when the pressure in the cooling water channel system exceeds a set pressure and a negative pressure valve that opens when the pressure in the cooling water channel system becomes negative. .

  According to the present invention, the reserve tank is integrally provided in the water injection / drainage base, and the reserve tank opens when the pressure in the cooling water channel system exceeds the set pressure and opens when the pressure in the cooling water channel system becomes negative. Since it is connected to the water injection / drain hose via a negative pressure valve, it is possible to inject cooling water and vent air through the reserve tank by providing either a negative pressure valve or a pressure valve with a manual opening function. The reserve tank can be integrated. Accordingly, the communication pipe connecting the water injection port and the reserve tank can be omitted, and the installation bracket and the like can be integrated into one, thereby simplifying the configuration, saving space and reducing costs. be able to.

  Furthermore, the sub-engine transport refrigeration apparatus of the present invention is the above-described sub-engine transport refrigeration apparatus, wherein the reserve tank is detachably attached to the inner surface of the front panel via a bracket and rotates about a horizontal axis. It is characterized by being freely supported.

  According to the present invention, since the reserve tank is detachably supported on the inner surface of the front panel via the bracket and is rotatable around the horizontal axis, the reserve tank is moved around the horizontal axis in accordance with the opening / closing operation of the front panel. By rotating, the reserve tank can be always supported in a vertical state. Accordingly, the reserve tank can be always functioned normally while maintaining the vertical posture. In addition, when the engine cooling water is exchanged, the reserve tank can be removed from the front panel and lowered, so that the engine cooling water can be drained and exchanged easily.

  According to the present invention, when the engine cooling water is poured into the cooling water channel system of the sub engine and the radiator, the water injection / drainage base is set at the set height position by opening the front panel upward, that is, the cooling water channel system of the sub engine and the radiator. Since the water can be injected by setting it at a position higher by α than the highest position in the engine, the engine cooling water can be reliably filled in the sub-engine and the radiator, and the risk of insufficient cooling water and air contamination can be suppressed. it can. In addition, since it is not necessary to install the water injection / drainage cap at a high position, the overall height of the unit can be lowered. Furthermore, the engine cooling water can be drained as it is through the hose connection part provided in the lower part of the cooling water channel system by removing the water injection / drainage base from the front panel and lowering it. Can be easily performed, and a drain port can be omitted, thereby saving space and reducing costs.

Embodiments according to the present invention will be described below with reference to the drawings.
[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 3.
FIG. 1 shows a plan layout view of a sub-engine transport refrigeration apparatus according to the first embodiment of the present invention, FIG. 2 shows a front view of the sub-engine transport refrigeration apparatus viewed from the engine side, and FIG. Fig. 2 also shows a front view of the engine with the front panel opened as seen from the engine side.
The sub-engine transport refrigeration apparatus 1 includes a substantially rectangular frame 2 whose periphery is covered with a panel 3. As shown in FIG. 3, the front panel 3 </ b> A in the panel 3 that covers the four sides of the frame 2 can be opened and closed upward with the hinge 4 provided at the top as a fulcrum.

  On the frame 2, a water-cooled diesel engine (hereinafter referred to as a sub-engine) 5 dedicated to the refrigeration system is disposed on the rear end side (the right end side in FIG. 1). Anti-vibration is supported. A clutch housing 6 is provided on one side of the sub-engine 5, and an electric motor 7 is integrally coupled via the clutch housing 6. The output shaft of the sub-engine 5 is connected to the rotating shaft 7A of the electric motor 7 through a one-way centrifugal clutch (not shown). The one-way centrifugal clutch transmits the power to the rotating shaft 7A on the electric motor 7 side when the rotation speed of the sub engine exceeds a predetermined value. The power from the electric motor 7 is transmitted to the sub engine 5 side. Is a structure that does not transmit. A clutch pulley (not shown) is provided on the driven side of the one-way centrifugal clutch.

  When the electric motor 7 is pre-cooled before loading the load in the freezer, after loading the load in the freezer, the vehicle is stopped in the base and kept cold, or when the frozen vehicle is sailed by ferry, Is driven by receiving power from an external commercial power source when the driver is stopped for a nap. A propeller fan 8 for ventilating a condenser 14 and a radiator 17 (described later) is provided at the end of the rotating shaft 7 </ b> A protruding from the electric motor 7 on the side opposite to the engine.

  A compressor 9 and an alternator 10 are installed above the electric motor 7 via a bracket (not shown) provided in the clutch housing 6. The compressor 9 and the alternator 10 are connected to the sub-engine 5 or the electric motor 7 through a drive belt 13 installed between pulleys 11 and 12 provided on the respective rotary shafts 9A and 10A and the clutch pulley. It is configured to be driven by either one.

  The compressor 9 constitutes a refrigeration cycle together with a condenser 14 (not shown), a receiver (not shown), an expansion valve (not shown) provided on the evaporator unit side installed in the freezer, an evaporator 15 and an accumulator 15 and the like. It functions to circulate in the refrigeration cycle by compressing and discharging to a high temperature and high pressure state. The alternator 10 has a function of generating and supplying electric power necessary for equipment in the refrigeration apparatus, such as driving power of an evaporator fan.

  On the frame 2, in addition to the compressor 9, a condenser 14, a receiver (not shown), an accumulator 15, and the like are installed as equipment on the condensing unit side of the refrigeration apparatus. The condenser 14 is a rectangular heat exchanger disposed substantially vertically behind a heat exchange guard 16 provided at the front end portion (left end portion in FIG. 1) of the frame 2, and is a plate fin tube type or parallel type. It can be constituted by a flow type heat exchanger or the like. The accumulator 15 can be disposed at a side portion of the electric motor 7 and below the compressor 9, whereby liquid refrigerant accumulates in the compressor 9 while the refrigeration apparatus is stopped, It is possible to prevent a phenomenon in which liquid compression occurs when the compressor 9 is started.

  Behind the condenser 14 is a radiator 17 that cools engine coolant circulated from the sub-engine 5. The radiator 17 can be configured by a fin tube type heat exchanger having tank portions at the top and bottom, and a cooling water pipe for circulating cooling water between the upper and lower tank portions and the sub-engine 5 is connected to The engine cooling water is circulated through a water pump (not shown).

  The propeller fan 8 is disposed so as to face the condenser 14 and the radiator 17. The propeller fan 8 sucks outside air through the shroud and bell mouth (not shown) through the heat exchange guard 16 and is ventilated to the condenser 14 and the radiator 17. The outside air is blown out backward. This outside air flows around the electric motor 7, the compressor 9, the alternator 10 and the sub-engine 5, and after cooling these devices, it is diffused in all directions by a diffusion plate 18 provided at the rear end of the frame 2. To be released.

  As shown in FIG. 2 and FIG. 3, a pressure valve that opens when the pressure in the cooling water channel system becomes equal to or higher than the set pressure and the pressure in the cooling water channel system become negative in the upper part of the cooling water channel system of the sub-engine 5. A reserve tank 19 into which cooling water flows in and out through a negative pressure valve that opens is connected through a communication pipe 20.

  Further, as shown in FIG. 2 and FIG. 3, a hose connection portion 21 is provided at the lowest part of the cooling water channel system of the sub-engine 5, and the water injection / drainage hose 22 is provided in the hose connection portion 21. Are connected at one end. The water injection / drainage hose 22 is configured by a bellows type hose that is extendable and flexible, and a water injection / drainage cap 23 with a cap is provided on the other end side.

  The water injection / drainage cap 23 is detachably installed on the inner surface of the front panel 3 </ b> A via the bracket 24. As shown in FIG. 3, the installation position of the water injection / drainage base 23 relative to the inner surface of the front panel 3A is a position that becomes a set height when the front panel 3A is opened upward, that is, the cooling of the sub-engine 5 and the radiator 17. The position is higher by α than the highest position in the channel. Further, the water injection / drainage cap 23 is installed via the bracket 24 so as to face upward when the front panel 3A is opened upward.

With the configuration described above, according to the present embodiment, the following operational effects can be obtained.
The sub-engine type transport refrigeration apparatus 1 is driven by the sub-engine 5 when the refrigeration vehicle is traveling. When the sub-engine 5 is driven and its rotational speed exceeds a predetermined rotational speed, the one-way centrifugal clutch is connected, and the power of the sub-engine 5 is transmitted to the clutch pulley and the motor shaft 7A. In this case, since the electric motor 7 is not supplied with power, the motor shaft 7A is idling, and the power from the sub-engine 7 is directly transmitted to the propeller fan 8 directly connected to the tip of the sub-engine 7 via the motor shaft 7A. Is done. As a result, the propeller fan 8 rotates, sucks outside air through the heat exchanger guard 16, and ventilates the condenser 14 and the radiator 17.

  Further, when the clutch pulley is rotated, the power of the sub-engine 5 is transmitted to the pulleys 11 and 12 via the drive belt 13, and the compressor 9 and the alternator 10 are driven. The DC power generated by rotating the alternator 10 is used as a power source for an evaporator unit, a controller, a starter motor of the sub engine 5 and the like installed in a freezer (not shown), and the evaporator fan motor of the evaporator unit is used. Driven to ventilate the air in the freezer to the evaporator.

  Similarly, when the compressor 9 is driven to rotate, a low-pressure refrigerant gas is sucked from the refrigeration cycle side, compressed, and discharged to the refrigeration cycle side. As is known, this refrigerant circulates in the refrigeration cycle that returns to the compressor 9 through the condenser 14, the receiver, the expansion valve, the evaporator, the accumulator 15, and the like, and during this time, heat is exchanged with the air in the freezer in the evaporator. A cooling operation for cooling the inside of the freezer is performed by cooling the air.

  In the sub-engine type transport refrigeration apparatus 1, the sub-engine 5 is stopped when a load is loaded or when the refrigerated vehicle is stopped for a break or the like at night. During this time, by connecting the electric motor 7 to an external commercial power source, the sub-engine type transport refrigeration apparatus 1 is switched to a motor drive operation using the electric motor 7 as a drive source. At this time, the electric motor 7 and the sub engine 5 are disconnected by the one-way centrifugal clutch, and the power from the electric motor 7 side to the sub engine 5 side is cut off. In this case, the power of the electric motor 7 is transmitted to the propeller fan 8 via the motor shaft 7A, and is also transmitted to the compressor 9 and the alternator 10 via the clutch pulley, the drive belt 13 and the pulleys 11 and 12, and the propeller. The fan 8, the compressor 9, and the alternator 10 are driven. Thereby, the cooling operation can be performed in the same manner as described above.

  On the other hand, the sub-engine 5 is a water-cooled engine, and the cooling water channel system and the radiator 17 need to be filled with engine cooling water. The engine cooling water inlet is generally installed at a position higher than the cylinder head and radiator of the engine (position higher by α than the highest position in the sub-engine and radiator cooling water systems) in order to avoid air contamination. As a result, the overall height of the unit was high.

  However, in this embodiment, the hose connection part 21 is provided in the lower part of the cooling water channel system of the sub-engine 5, and the hose connection part 21 is extendable and flexible, and has a cap at the other end. A water injection / drain hose 22 provided with a drain base 23 is connected, and the water injection / drain base 23 is the inner surface of the front panel 3A of the sub-engine transport refrigeration apparatus 1 and the front panel 3A is opened upward. It is installed at the position where the set height is reached. For this reason, when water is poured into the cooling water channel system of the sub-engine 5 and the radiator 17, the water injection / drainage cap 23 is set at the set height position by opening the front panel 3A upward, that is, the sub-engine 5 and the radiator 17 are opened. The water can be poured by setting it at a position higher by α than the highest position in the cooling water channel system.

  Thereby, mixing of air can be avoided and the engine cooling water can be reliably filled in the sub-engine 5 and the radiator 17, and the risk of insufficient cooling water and air mixing can be reduced. Moreover, since it is not necessary to install the water injection / drainage cap 23 at a position higher by α than the highest position in the cooling water channel system, it becomes possible to reduce the overall unit height of the sub-engine type transport refrigeration apparatus 1, The mountability to a refrigeration vehicle can be improved.

  Further, since the water injection / drainage base 23 is detachably installed on the inner surface of the front panel 3A via the bracket 24, the water injection / drainage base 23 is removed from the front panel 3A and is lowered as shown in FIG. By lowering the engine cooling water, the engine cooling water can be drained as it is through the hose connection portion 21 provided in the lower part of the cooling water channel system. Therefore, the engine cooling water can be exchanged easily, and a drain port provided in the cooling water channel system can be eliminated, so that the space around the engine can be saved and the cost can be reduced.

  Further, since the water injection / drainage cap 23 is installed so as to face upward when the front panel 3A is opened upward, the water injection that is directed upward by opening the front panel 3A upward and removing the cap is performed. Cooling water can be poured from the cum drainage cap 23. Therefore, the cooling water can be easily poured and replenished as before. In addition, since the water injection / drainage hose 22 is constituted by a bellows type hose, the bellows type hose freely expands / contracts or bends when the front panel 3A is opened / closed to follow the opening / closing operation. Therefore, even if the other end side of the water injection / drainage hose 22 connected to the sub-engine 5 is connected to the front panel 3A via the water injection / drainage base 23, the opening / closing operation of the front panel 3A is not hindered. In addition, the convenience of pouring and draining engine cooling water can be ensured.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS.
The present embodiment is different from the first embodiment described above in that a reserve tank is integrally provided in the water injection / drainage cap 23 with cap. Since other points are the same as those in the first embodiment, description thereof will be omitted.
In the present embodiment, a reserve tank 30 is integrally provided on a water injection / drainage cap 23 with a cap provided on the other end side of the water injection / drainage hose 22.

  As shown in FIGS. 4 and 5, the reserve tank 30 is detachably supported on the inner surface of the front panel 3 </ b> A via a bracket 31 and is rotatable around a horizontal shaft 32. The reserve tank 30 is located at a position where the water injection / drainage cap 23 with a cap becomes a set height when the front panel 3A is opened upward, that is, the cooling of the sub-engine 5 and the radiator 17 as in the first embodiment. It is installed at a position that is higher by α than the highest position in the channel.

  Moreover, the bottom part of the reserve tank 30 is set as the structure screwed and installed in the flange part 22A provided in the edge part of the water injection / drainage hose 22 as FIG. 6 shows. In the case of this embodiment, the end portion of the water injection / drainage hose 22 is provided on the valve body 34 and the pressure valve 35 including the spring 33 and the valve body 34 that opens when the pressure in the cooling water channel system becomes equal to or higher than the set pressure. In addition, a negative pressure valve 38 including a spring 36 and a valve body 37 that are opened when the pressure in the cooling water channel system becomes negative is interposed, and the reserve tank 30 is connected via these pressure valve 35 and negative pressure valve 38. The water injection / drainage hose 22 communicates with the water injection / drainage hose 22. Note that the negative pressure valve 38 is configured to be openable by being pushed in with an elongated bar during water injection or air bleeding.

  Even if the reserve tank 30 is provided integrally with the water injection / drainage base 23 via the pressure valve 35 and the negative pressure valve 38 as in the present embodiment, the negative pressure valve 38 is manually opened when water is injected or air is vented. By having the function to perform, it becomes possible to inject cooling water and remove air through the reserve tank 30. Accordingly, the 23 parts of the water injection / drainage base and the reserve tank 30 can be integrated so that the communication pipe connecting the reserve tank and the water injection port can be omitted, and the installation bracket and the like are also 1 It is possible to integrate them into a single unit, simplifying the configuration, saving space, reducing costs, and the like.

  Further, since the reserve tank 30 is detachably supported on the inner surface of the front panel 3A via the bracket 31 and is rotatable about the horizontal shaft 32, the reserve tank 30 follows the opening / closing operation of the front panel 3A. The reserve tank 30 can always be supported in a vertical state by rotating the shaft around the horizontal axis 32. For this reason, the reserve tank 30 can always be maintained in a vertical posture to function normally. Further, when the engine cooling water is replaced, the reserve tank 30 can be detached from the front panel 3A and lowered downward, so that the engine cooling water can be drained and replaced easily.

  In addition, this invention is not limited to the invention concerning the said embodiment, In the range which does not deviate from the summary, it can change suitably. For example, in the above-described embodiment, the example in which the capacitor 14 and the radiator 17 are disposed on the front end side of the frame 2 has been described. However, the capacitor 14 and the radiator 17 are disposed on the front side, the back side, and the like of the frame 2. Also good. Moreover, although the embodiment of the structure which connected the propeller fan 8 for ventilating the capacitor | condenser 14 and the radiator 17 directly to the rotating shaft 7A of the electric motor 7 was demonstrated, it is good also as a structure which drives the propeller fan 8 with an independent electric motor. .

  Furthermore, in the second embodiment, the example in which the negative pressure valve 37 is provided with a manual opening function has been described, but this manual opening function may be provided in the pressure valve 34. The water injection / drainage base 23 and the reserve tank 30 may be detachable from the front panel 3A, and the brackets 24 and 31 are detachably attached to the front panel 3A or water is injected into the brackets 24 and 31. Either the drainage cap 23 and the reserve tank 30 may be detachably provided.

1 is a plan layout view of a sub-engine transport refrigeration apparatus according to a first embodiment of the present invention. It is the front view which looked at the refrigerating device for sub engine type transportation shown in Drawing 1 from the engine side. It is the front view of the state which open | released the front panel which looked at the refrigeration apparatus for sub engine type transportation shown in FIG. 1 from the engine side. It is the front view which looked at the sub engine type transport refrigeration equipment concerning a 2nd embodiment of the present invention from the engine side. It is the front view of the state which opened the front panel which looked at the refrigerating device for sub engine type transportation shown in Drawing 4 from the engine side. FIG. 5 is a longitudinal sectional view of a water injection / drain port and a reserve tank portion of a sub engine cooling water channel system of the sub engine type transport refrigeration apparatus shown in FIG. 4.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sub engine type transport refrigeration equipment 2 Frame 3 Panel 3A Front panel 5 Sub engine 9 Compressor 14 Condenser 15 Accumulator 21 Hose connection part 22 Water injection / drainage hose 23 Water injection / drainage base 24 Bracket 30 Reserve tank 31 Bracket 32 Horizontal shaft 35 Pressure valve 38 Negative pressure valve

Claims (6)

Equipment on the condensing unit side including a water-cooled sub-engine and a compressor driven by the sub-engine is mounted on a frame whose periphery is covered by a panel including a front panel that can be opened upward. In sub-engine type transport refrigeration equipment,
A hose connection portion is provided in a lower part of the cooling water channel system of the sub engine,
Connected to the hose connection part is a water injection / drainage hose that is flexible and flexible, and has a water injection / drainage cap with a cap at the other end,
The sub-engine-type transport refrigeration apparatus, wherein the water injection / drainage base is installed at a position which is an inner surface of the front panel and is set to a height when the front panel is opened upward.   2. The sub-engine transport refrigeration apparatus according to claim 1, wherein the water injection / drainage cap is disposed so as to face upward when the front panel is opened upward. 3.   3. The sub-engine transport refrigeration apparatus according to claim 1, wherein the water injection / drain hose is constituted by a bellows type hose.   The sub-engine type transport refrigeration apparatus according to any one of claims 1 to 3, wherein the water injection / drainage base is detachably installed on an inner surface of the front panel via a bracket. The water injection / drainage base is integrally provided with a reserve tank,
The reserve tank is connected to the water injection / drainage hose via a pressure valve that opens when the pressure in the cooling water channel system exceeds a set pressure and a negative pressure valve that opens when the pressure in the cooling water channel system becomes negative. The sub-engine type transport refrigeration apparatus according to any one of claims 1 to 4, wherein 6. The sub-engine transport refrigeration apparatus according to claim 5, wherein the reserve tank is detachably supported on an inner surface of the front panel via a bracket and is rotatable about a horizontal axis.

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