JP2018009734A - Cooling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling device which achieves downsizing of a cooler while improving the efficiency of heat exchange in the cooler.SOLUTION: In a cooling device 1, a cooler housed in a machine room 31 includes: a compressor 42; a condensation part 43; and a blower 7 which feeds heat exchange air to the condensation part 43. The condensation part 43 includes: a main condenser 44; and an auxiliary condenser 45 which is disposed at the upstream side of the main condenser 44 in refrigerant flow. The auxiliary condenser 45 is disposed at the windward side of the heat exchange air passing through the interior of the machine room 31 with respect to the main condenser 44.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a cooling device with a built-in cooler.

  Refrigeration / refrigeration showcases equipped with a storage room for cooling an object to be cooled such as food or a refrigerator such as a refrigerator / refrigerator have a built-in cooler for performing a refrigeration cycle using refrigerant.

  The refrigeration cycle is performed by a cooler composed of four elements, a compressor, a condenser, an expansion valve, and an evaporator, and refrigerant piping connecting them. In the refrigeration cycle, the low-temperature and low-pressure gas refrigerant generated in the evaporator to cool the storage chamber is compressed by the compressor into a high-temperature and high-pressure gas, and then dissipated and liquefied by heat exchange in the condenser. Cooling is performed by repeating a cycle in which the refrigerant is depressurized by an expansion valve to obtain a low-temperature and low-pressure liquid refrigerant, the refrigerant is vaporized by an evaporator, and heat is absorbed from the air by heat of vaporization.

  For such a cooling device, for example, a technique disclosed in Patent Document 1 is employed. According to Patent Document 1, an auxiliary condenser is arranged upstream of a main condenser in a refrigerant flow of a refrigeration cycle of a cooler housed in a machine room, and the cooling device is heated by heat exchange in the auxiliary condenser. By flowing the reduced refrigerant to the main condenser, the efficiency of heat exchange in the main condenser is increased.

Japanese Patent Laying-Open No. 2015-129623 (page 5, FIG. 3)

  In Patent Document 1, heat exchange air passes through the inside of the machine room, the main condenser is disposed on the windward side, and the auxiliary condenser is disposed on the leeward side. Due to such a structure, the heat exchange air whose temperature has increased due to heat exchange in the main condenser on the windward side needs to be lowered before passing through the auxiliary condenser, and between the main condenser and the auxiliary condenser. An air blower fan is disposed between the main condenser and the auxiliary condenser. For this reason, there is a problem that the arrangement space of the entire cooler in the machine room is increased by the interval provided between the main condenser and the auxiliary condenser.

  The present invention has been made paying attention to such problems, and an object of the present invention is to provide a cooling device in which the size of the cooler is reduced while increasing the efficiency of heat exchange in the cooler.

In order to solve the above problems, the cooling device of the present invention includes:
A storage room in which an object to be cooled is stored, and a machine room in which a cooler using a refrigerant is stored,
The cooler accommodated in the machine room is a cooling device including a compressor, a condensing unit, and a blower for supplying heat exchange air to the condensing unit,
The condensing unit includes a main condenser and an auxiliary condenser disposed on the upstream side of the main condenser in the refrigerant flow,
The auxiliary condenser is arranged on the upstream side of the heat exchange air passing through the inside of the machine room with respect to the main condenser.
According to this feature, the heat exchange air passing through the inside of the machine room first passes through the auxiliary condenser disposed on the windward side, and the heat exchange air having a low temperature passes through the auxiliary condenser. Since the heat exchange is stably performed in the auxiliary condenser and the temperature of the refrigerant can be lowered before flowing into the main condenser, the heat exchange in the cooler can be efficiently performed, and the auxiliary condenser and Since the main condenser can be disposed close to the main condenser, the cooler can be reduced in size.

The auxiliary condenser, the main condenser, and the blower are arranged in a straight line along the passage direction of the heat exchange air passing through the inside of the machine room, and are unitized. It is said.
According to this feature, by operating the blower on the leeward side inside the machine room, the air volume of the heat exchange air passing through the auxiliary condenser and the main condenser can be stably secured, and the auxiliary condenser and the main condensation can be secured. A small unit can be obtained by arranging the fan and the blower in a straight line.

The main condenser is composed of the refrigerant pipe that is repeatedly inverted and bent so as to be folded into a plurality of rows, and a heat radiating plate,
The auxiliary condenser is composed of only a refrigerant pipe that is repeatedly inverted and bent at the front face of the main condenser.
According to this feature, the auxiliary condenser is composed of only the refrigerant pipe on the front surface of the main condenser, and the entire condenser can be made compact by being downsized.

A filter is detachably provided between the auxiliary condenser and the main condenser.
According to this feature, the position of the filter can be easily regulated by sandwiching the filter between the auxiliary condenser and the main condenser.

The condensing part is housed so as to be able to be taken in and out of the machine room.
According to this feature, maintenance work can be easily performed by removing the condensing unit from the machine room.

It is a perspective view which shows the cooling device in an Example. It is sectional drawing of the side view which shows the structure of a cooling device. It is a cross-sectional schematic diagram of the top view which shows the state which pulled out the unit base from the machine room. It is a schematic diagram which shows the structure of the refrigerating cycle in a cooling device. It is a partially expanded sectional view of the side view which shows the structure of the cooler accommodated in a machine room.

  EMBODIMENT OF THE INVENTION The form for implementing the cooling device which concerns on this invention is demonstrated below based on an Example.

  The cooling device according to the embodiment will be described with reference to FIGS. 1 to 5. Hereinafter, the left side of FIG. 2 is the front side (front side) of the cooling device, and description will be made with reference to the vertical and horizontal directions when viewed from the front side.

  The cooling device 1 according to the present embodiment is a freezing / refrigeration showcase that is installed in a supermarket, a convenience store, or the like to display a product such as a food product in a cold state. As shown in FIG. A cold storage chamber 2 (storage chamber) for cooling and storing products (not shown) provided above, and a machine for storing a cooler and the like provided below the cold storage chamber 2 for performing a refrigeration cycle using refrigerant. Chamber 3, and a cooler housed in machine room 3 can cool the cold insulation chamber 2 by performing a refrigeration cycle in the cooling device 1.

  As shown in FIG. 2, the cooling device 1 includes an outer box 21 having a substantially U-shaped structure whose front side is opened, and an inner box 22 having a substantially U-shape, which is also open on the inner side, and has a front side. The case main body 20 comprised from these is provided, and the cold storage chamber 2 is formed in the internal space. The rear end 22a of the inner box 22 is attached with rear ends of brackets 23, 23 extending in the front-rear direction, and shelf plates 24, 24 are attached on the brackets 23, 23. Goods can be displayed on the upper surface of the bottom 22b of the box 22, respectively.

  In addition, a ventilation path 25 is formed between the outer box 21 and the inner box 22 on the back side of the case body 20, and a vertically lower portion of the ventilation path 25 communicates with an upper machine chamber 30 described later. An evaporator 41, which will be described later, that constitutes the evaporator, and a blower 5 that sends air toward the evaporator 41 are disposed. In addition, the evaporator 41 can heat-exchange by the refrigerating cycle using a refrigerant | coolant, and can cool the surrounding air.

  Further, a cold air outlet 26 communicating with the ventilation path 25 is formed downward on the lower edge of the upper front end of the case body 20, and the upper machine is opened upward on the upper edge of the lower front end of the case body 20. Since the cold air suction port 27 communicating with the chamber 30 is formed, the cold air cooled by the evaporator 41 is sucked into the lower suction port from the upper air outlet 26 by operating the blower 5 in the upper machine chamber 30. It is blown out toward the mouth 27.

  According to this, an air curtain is formed on the open surface of the front surface of the case body 20 by the airflow of cool air, and a part of the cool air flows into the cold insulation chamber 2, thereby cooling the inside of the cold insulation chamber 2. The state can be maintained. The cold air sucked from the suction port 27 flows into the upper machine chamber 30 and is sent again to the evaporator 41 by the blower 5, so that the cold air is circulated efficiently.

  As shown in FIGS. 2 and 4, the machine room 3 provided below the cold room 2 is composed of an upper machine room 30 and a lower machine room 31 formed below the upper machine room 30. The compressor 42, the condenser 43 (condensing unit), the expansion valve 46, and the evaporator 41 constituting a cooler that performs a refrigeration cycle using refrigerant are accommodated in a state where they are connected by a refrigerant pipe 47.

  As shown in FIG. 2, the upper machine room 30 is formed between the bottom 22 b of the inner box 22 and the bottom 21 a of the outer box 21 that constitute the case body 20. It communicates with the ventilation path 25 on the back side.

  Further, a drain portion 30 a is provided at a predetermined position in front of the bottom portion 21 a of the outer box 21 that constitutes the bottom surface of the upper machine room 30. Furthermore, although not shown here, the drainage part 30a is connected to the wastewater treatment part 6 (see FIG. 3) disposed in the lower machine chamber 31 below by a water distribution pipe 30b. In addition, the bottom surface of the upper machine room 30 has a shape inclined downward toward the drainage part 30a, and the water generated when the frost adhering to the evaporator 41 is defrosted with cooling is inclined. It is easy to flow to the drainage part 30a along.

  The lower machine room 31 is provided below the upper machine room 30 across the bottom 21a of the outer box 21, and is formed in a box shape having openings in the front and rear. A rectangular ventilation port 32 is provided in the front opening. (Refer FIG. 1, FIG. 2) is attached so that attachment or detachment is possible. Further, the rear opening is closed by the lower end portion of the back cover 28 that is detachably attached to the back side of the cooling device 1, and is formed between the back surface portion 21 b of the outer box 21 and the back cover 28 in the vertical direction. It communicates with the exhaust duct 29.

  Further, a spacer 21c having an H-shape when viewed from above is provided on the back surface portion 21b of the outer box 21 so as to contact the back cover 28 from within the exhaust duct 29 described above. The center portion is prevented from being bent and the mounting strength of the back cover 28 is increased.

  A slit 28a (see FIG. 1) is provided above the back cover 28 in the width direction, and the heat exchange air that has passed through the lower machine chamber 31 and went up in the exhaust duct 29 is slit. The air is exhausted to the outside through 28a. In addition, heat exchange air is the air which delivers the heat | fever radiated from the refrigerant | coolant by heat exchange in the condenser 43 which comprises the cooler which performs a refrigerating cycle.

  As shown in FIG. 3, the lower machine room 31 is divided into three sections in the width direction, and a compressor that compresses the low-temperature and low-pressure refrigerant generated in the evaporator 41 in the refrigeration cycle is provided in the center section. 42, a condenser 43 that is arranged downstream of the compressor 42 in the refrigerant flow of the refrigeration cycle and performs heat exchange, and a blower 7 that actively sends heat exchange air from the front to the rear in the lower machine chamber 31. Are mainly arranged.

  Further, in the compartments on both sides of the lower machine room 31, the waste water treatment part 6 connected by the drainage part 30a of the upper machine room 30 and the distribution pipe 30b described above, a control part (not shown) for controlling the operation of the cooling device 1 and the like And an electrical box 8 in which are installed.

  In addition, the condenser 43 in the present embodiment includes a main condenser 44 and an auxiliary condenser 45 disposed on the upstream side of the main condenser 44 in the refrigerant flow of the refrigeration cycle.

  The main condenser 44 includes a refrigerant pipe 44a that is repeatedly inverted and bent so as to be folded in a plurality of rows before and after, and a plurality of heat radiation plates 44b and 44b that are fitted into the refrigerant pipe 44a so that the heat exchange air efficiently passes in the front-rear direction. ,... (See FIGS. 1 and 4), and the heat exchange amount is larger than that of the auxiliary condenser 45.

  The auxiliary condenser 45 is composed of a refrigerant pipe 45a (see FIGS. 1 and 4) that is repeatedly inverted and bent in a line in the front and rear direction. Further, since the auxiliary condenser 45 is not provided with a heat radiating plate, that is, by being constituted only by the refrigerant pipe 45a, the entire condenser 43 can be made compact.

  Next, the configuration of the refrigeration cycle in the cooling device 1 will be described with reference to FIG. In FIG. 4, the lower side of the paper is described as the front side (front side) of the cooling device 1, and the upper side of the paper is described as the back side (rear side) of the cooling device 1. Further, since the refrigeration cycle is composed of an endless refrigerant circuit C, the refrigeration cycle will be described in order along the refrigerant flow with the evaporator 41 constituting the cooler as a base point.

  As shown in FIG. 4, the refrigerant circuit C of the refrigeration cycle in the cooling device 1 includes the compressor 42 and the main condenser 44 that constitute the coolers accommodated in the upper machine chamber 30 and the lower machine chamber 31 as described above. The auxiliary condenser 45, the expansion valve 46, the evaporator 41, and the refrigerant pipe 47 connecting them are mainly configured.

  The upper machine chamber 30 is disposed on the upstream side of the evaporator 41 in the refrigerant flow of the refrigeration cycle, and an evaporator 41 that cools the surrounding air by heat exchange (heat absorption) with the refrigerant. And an expansion valve 46 for performing the above.

  The lower machine chamber 31 includes a compressor 42 that compresses the refrigerant, and a main condenser that is disposed upstream of the compressor 42 in the refrigerant flow of the refrigeration cycle and that dissipates heat from the refrigerant by heat exchange with the heat exchange air. A container 44 and an auxiliary condenser 45 are accommodated.

  In the refrigerant circuit C, the evaporator 41 disposed in the upper machine chamber 30 is connected to a compressor 42 disposed in the lower machine chamber 31 by a refrigerant pipe 47 extending downstream. An accumulator 48 is connected to the upstream side of the compressor 42. The accumulator 48 is provided to separate the vaporized refrigerant and the liquid refrigerant, and prevents the inflow of the liquid refrigerant that causes a failure of the compressor 42.

  In the lower machine chamber 31, the compressor 42 is connected to the auxiliary condenser 45 by a refrigerant pipe 47 extending downstream, and the auxiliary condenser 45 is connected to the main condenser 44 by a refrigerant pipe 47 extending further downstream. ing.

  The main condenser 44 is connected to an expansion valve 46 disposed in the upper machine chamber 30 by a refrigerant pipe 47 extending downstream. A liquid receiver 49 is disposed downstream of the main condenser 44 so that liquid refrigerant is stored.

  In the upper machine chamber 30, the expansion valve 46 is connected to the evaporator 41 by a refrigerant pipe 47 extending downstream, and the refrigerant circulates through the endless refrigerant circuit C.

  Next, the flow of the refrigerant in the refrigerant circuit C of the refrigeration cycle will be described with reference to FIG. Here, the flow of the refrigerant in the cooler disposed in the refrigerant circuit C will be described, and the description of the flow of the refrigerant in the accumulator 48 and the liquid receiver 49 will be omitted.

  As shown in FIG. 4, first, a low-temperature and low-pressure gas refrigerant generated by heat exchange with the surrounding air in the evaporator 41 disposed in the upper machine room 30 passes through a refrigerant pipe 47 extending downstream to the lower part. It flows into the compressor 42 disposed in the machine room 31.

  The low-temperature and low-pressure vaporized refrigerant flowing into the compressor 42 in the lower machine chamber 31 is compressed to become a high-temperature and high-pressure vaporized refrigerant. Note that the high-temperature and high-pressure vaporized refrigerant is easily liquefied by lowering the temperature.

  Next, the high-temperature and high-pressure vaporized refrigerant sent out from the compressor 42 flows into the auxiliary condenser 45 and is radiated by heat exchange with the heat exchange air passing through the lower machine chamber 31, thereby lowering the temperature. .

  Next, the high-temperature and high-pressure vaporized refrigerant that has flowed into the main condenser 44 from the auxiliary condenser 45 is radiated by heat exchange with the heat exchange air that passes through the lower machine chamber 31, so that the temperature decreases and liquefies. .

  The liquid refrigerant sent out from the main condenser 44 flows into the expansion valve 46 disposed in the upper machine chamber 30 through the refrigerant pipe 47 extending downstream, and is reduced in pressure to become a low-temperature low-pressure liquid refrigerant. It flows into 41 and vaporizes. Heat exchange is performed by absorbing heat from the surrounding air by the heat of vaporization generated at this time, and the cooling device 1 is cooled by repeating a series of refrigeration cycles in the refrigerant circuit C described above.

  In this way, the refrigerant flowing through the refrigerant circuit C is radiated in advance in the auxiliary condenser 45 by heat exchange with the heat exchange air passing through the lower machine chamber 31, so that the temperature is lowered to some extent in the downstream side. Therefore, the efficiency of heat exchange of the refrigerant in the main condenser 44 is increased. Further, since the amount of heat exchange in the main condenser 44 can be suppressed as compared with the case where the auxiliary condenser 45 is not provided, the main condenser 44 can be reduced in size. The auxiliary condenser 45 may lower the temperature of the high-temperature and high-pressure vaporized refrigerant and liquefy a part thereof.

  Next, the relationship between the main condenser 44 and the auxiliary condenser 45 that perform heat exchange of the refrigerant in the lower machine chamber 31 and the heat exchange air that passes through the lower machine chamber 31 will be described with reference to FIG.

  As shown in FIG. 5, the compressor 42, the main condenser 44, the auxiliary condenser 45, and the blower 7 (see FIG. 3) disposed in the central section of the lower machine room 31 are made of a rectangular plate material. The auxiliary condenser 45, the main condenser 44, and the blower 7 are arranged in order from the front.

  The blower 7 is attached to the back side of the main condenser 44, sucks heat exchange air from the front side of the main condenser 44, and passes heat through the main condenser 44 to generate heat exchange air having heat from the back side. Efficient exhaust can be achieved. Further, an auxiliary blower 10 is provided above the lower machine room 31 on the back side, and heat exchange air having heat exhausted from the back side of the main condenser 44 by the blower 7 is provided behind the lower machine room 31. The air can be efficiently exhausted toward the exhaust duct 29 formed in the above. That is, in the lower machine room 31, the heat exchange air passes from the front toward the rear.

  The auxiliary condenser 45 is disposed on the windward side of the main condenser 44 in the lower machine room 31, so that the air outside the cooling device 1 taken in from the ventilation port 32 provided on the front side of the lower machine room 31. Can be used as heat exchange air.

  Further, the auxiliary condenser 45 is composed only of the refrigerant pipe 45a that is repeatedly inverted and bent in a line in the front and rear direction as described above, and is not warmed by heat from the main condenser 44 in addition to a small heat exchange amount. Since the external air blows directly to the auxiliary condenser 45, the heat of the heat exchange air exhausted from the back side of the auxiliary condenser 45 is suppressed to such an extent that the heat exchange in the main condenser 44 having a large heat exchange amount is not hindered. It has been.

  As described above, the auxiliary condenser 45 having a smaller heat exchange amount than that of the main condenser 44 is disposed on the windward side of the main condenser 44 in the lower machine chamber 31, so that the heat exchange air having a lower temperature causes the auxiliary condenser 45 to be moved. Since it is unnecessary to cool the heat exchange air by separating the auxiliary condenser 45 and the main condenser 44 from each other first, the auxiliary condenser 45 can be provided close to the front surface of the main condenser 44, The condenser 43 can be reduced in size.

  Further, in the lower machine chamber 31, the blower 7 operates on the lee side of the auxiliary condenser 45 and the main condenser 44, so that the air volume of the heat exchange air passing through the auxiliary condenser 45 and the main condenser 44 is stabilized. It can be secured.

  In the lower machine chamber 31, the filter 9 is detachably sandwiched between the auxiliary condenser 45 and the main condenser 44, and the position of the filter 9 can be easily regulated. ing. Further, by adsorbing dust or the like on the front side of the filter 9, there is no clogging between the heat radiation plates 44 b, 44 b,. Since it can be easily attached and detached, it is easy to perform cleaning and the like.

  Moreover, it can be set as a small unit by arrange | positioning the auxiliary condenser 45, the main condenser 44, and the air blower 7 in a straight line along the passage direction of the heat exchange air in the lower machine room 31. FIG.

  Moreover, the condenser 43 can be reduced in size by attaching the auxiliary condenser 45 directly to the front surface of the main condenser 44 and unitizing it.

  Further, the auxiliary condenser 45 is constituted only by the refrigerant pipe 45a that is repeatedly inverted and bent in a line in the front-rear direction, whereby the dimension in the front-rear direction of the auxiliary condenser 45 can be shortened, and the condenser 43 can be further downsized. . In addition, since the auxiliary condenser 45 has a substantially planar structure in a direction perpendicular to the front-rear direction, the condenser 43 can be further downsized.

  3 and FIG. 5, the unitized auxiliary condenser 45, the main condenser 44, and the blower 7 and the compressor 42 are unit bases made of a rectangular plate provided in the lower machine chamber 31. 33. The unit base 33 is accommodated so as to be movable in the front-rear direction along guide members 34, 34 that are opposed to each other on the bottom 31a of the lower machine chamber 31 and extend in the front-rear direction. 3 shows a state in which the entire unit base 33 is housed in the lower machine chamber 31, and the illustration of the two-dot chain line of the refrigerant pipe 47 is omitted for convenience of explanation.

  According to this, since the compressor 42, the main condenser 44, the auxiliary condenser 45, and the blower 7 placed on the unit base 33 can be pulled out together, the compressor disposed in the lower machine chamber 31. 42, the maintenance work of the main condenser 44, the auxiliary condenser 45, and the air blower 7 etc. can be performed easily.

  If at least the main condenser 44 and the auxiliary condenser 45 are unitized and placed on the unit base 33, the main condenser 44 and the auxiliary condenser 45 are collectively pulled forward to maintain the condenser 43. Work etc. can be performed easily.

  Further, stopper members 35, 35 each having a crank shape in a side view are provided behind the rear ends of the guide members 34, 34. When the unit base 33 is stored in the lower machine chamber 31, the unit base 33 is provided. , The rear end of the unit base 33 comes into contact with the stopper members 35 and 35 to restrict the rearward movement, and the compressor 42, the main condenser 44, the auxiliary condenser 45 and the blower on the unit base 33 are restricted. 7 can be correctly arranged at a predetermined position in the lower machine chamber 31. The unit base 33 may be provided with casters, rollers, etc. so that it can easily move back and forth.

  The refrigerant pipe 47 disposed in the lower machine chamber 31 is formed with expansion / contraction portions 47a and 47a (see FIGS. 4 and 5) that expand and contract in the front-rear direction in accordance with the movement of the unit base 33 in the front-rear direction. Thus, the refrigerant pipe 47 itself can be prevented from being damaged without disturbing the movement of the unit base 33.

  Further, the auxiliary condenser 45 is provided only in the upper part of the front surface of the main condenser 44, so that the heat exchange air that has passed through the auxiliary condenser 45 and has heat is moved upward in the leeward main condenser 44. Since the outside air that is not warmed by the heat of the auxiliary condenser 45 can be directly taken in from the lower part of the front surface of the main condenser 44, the refrigerant can exchange heat in the main condenser 44. Efficiency is increased.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above-described embodiment, the auxiliary condenser 45 and the main condenser 44 are disposed close to each other along the direction in which the heat exchange air flows in the lower machine chamber 31. However, the present invention is not limited thereto. As long as the auxiliary condenser is disposed on the windward side of the main condenser, the auxiliary condenser and the main condenser may be separated from each other. In this case, it is preferable that the filter provided between the auxiliary condenser and the main condenser is detachably attached to the front face of the main condenser.

  In the above-described embodiment, the auxiliary blower 10 is described as being provided on the back side of the lower machine room 31 (the leeward side of the main condenser 44). However, the present invention is not limited to this, and the auxiliary blower is a wind of the main condenser. It may be provided on the upper side, and may be provided between the auxiliary condenser and the main condenser or on the windward side of the auxiliary condenser.

1 Cooling device
2 Cold room (storage room)
3 Machine room 6 Waste water treatment part 7 Blower 8 Electrical box 9 Filter 10 Auxiliary blower 30 Upper machine room 31 Lower machine room 33 Unit base 41 Evaporator (cooler)
42 Compressor (cooler)
43 Condenser (cooler, condenser)
44 Main condenser (cooler, condenser)
45 Auxiliary condenser (cooler, condenser)
46 Expansion valve (cooler)
47 Refrigerant piping C Refrigerant circuit

In order to solve the above problems, the cooling device of the present invention includes:
A storage room in which an object to be cooled is stored, and a machine room in which a cooler using a refrigerant is stored,
The cooler accommodated in the machine room is a cooling device including a compressor, a condensing unit, and a blower for supplying heat exchange air to the condensing unit,
The condensing unit includes a main condenser and an auxiliary condenser disposed on the upstream side of the main condenser in the refrigerant flow,
The auxiliary condenser is disposed on the upstream side of the heat exchange air passing through the inside of the machine room with respect to the main condenser ,
The auxiliary condenser has a smaller occupied area as viewed from the upstream side of the heat exchange air passing through the inside of the machine room than the main condenser .
According to this feature, the heat exchange air passing through the inside of the machine room first passes through the auxiliary condenser disposed on the windward side, and the heat exchange air having a low temperature passes through the auxiliary condenser. Since the heat exchange is stably performed in the auxiliary condenser and the temperature of the refrigerant can be lowered before flowing into the main condenser, the heat exchange in the cooler can be efficiently performed, and the auxiliary condenser and Since the main condenser can be disposed close to the main condenser, the cooler can be reduced in size.

In order to solve the above problems, the cooling device of the present invention includes:
A storage room in which an object to be cooled is stored, and a machine room in which a cooler using a refrigerant is stored,
The cooler accommodated in the machine room is a cooling device including a compressor, a condensing unit, and a blower for supplying heat exchange air to the condensing unit,
The condensing unit includes a main condenser and an auxiliary condenser disposed on the upstream side of the main condenser in the refrigerant flow,
The auxiliary condenser is disposed on the upstream side of the heat exchange air passing through the inside of the machine room with respect to the main condenser,
A filter is detachably provided between the auxiliary condenser and the main condenser,
The auxiliary condenser has a smaller occupied area as viewed from the upstream side of the heat exchange air passing through the inside of the machine room than the main condenser.
According to this feature, the heat exchange air passing through the inside of the machine room first passes through the auxiliary condenser disposed on the windward side, and the heat exchange air having a low temperature passes through the auxiliary condenser. Since the heat exchange is stably performed in the auxiliary condenser and the temperature of the refrigerant can be lowered before flowing into the main condenser, the heat exchange in the cooler can be efficiently performed, and the auxiliary condenser and Since the main condenser can be disposed close to the main condenser, the cooler can be reduced in size. Further, the position of the filter can be easily regulated by sandwiching the filter between the auxiliary condenser and the main condenser.

Claims (5)

A storage room in which an object to be cooled is stored, and a machine room in which a cooler using a refrigerant is stored,
The cooler accommodated in the machine room is a cooling device including a compressor, a condensing unit, and a blower for supplying heat exchange air to the condensing unit,
The condensing unit includes a main condenser and an auxiliary condenser disposed on the upstream side of the main condenser in the refrigerant flow,
The cooling apparatus according to claim 1, wherein the auxiliary condenser is disposed on the upstream side of the heat exchange air passing through the inside of the machine room with respect to the main condenser.   The auxiliary condenser, the main condenser, and the blower are arranged in a straight line along the passage direction of the heat exchange air passing through the inside of the machine room, and are unitized. The cooling device according to claim 1. The main condenser is composed of the refrigerant pipe that is repeatedly inverted and bent so as to be folded into a plurality of rows, and a heat radiating plate,
3. The cooling device according to claim 1, wherein the auxiliary condenser is configured only by a refrigerant pipe that is repeatedly inverted and bent at a front surface of the main condenser. 4.   The cooling device according to any one of claims 1 to 3, wherein a filter is detachably provided between the auxiliary condenser and the main condenser.   The cooling device according to any one of claims 1 to 4, wherein the condensing unit is accommodated so as to be able to be taken in and out of the machine room.

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