JP2641394B2 - Cooling method and cooling device for showcase and vending machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for cooling a food storage showcase or a product storage case such as a vending machine, and more particularly to a freezer or refrigeration showcase installed in a large store. TECHNICAL FIELD The present invention relates to a showcase and a vending machine cooling method and a cooling device suitable for cooling a vending machine.

[0002]

2. Description of the Related Art In recent years, the size of stores has been increasing due to the relaxation of the large store method. In the food industry, frozen foods and chilled foods have been increasing. Along with this, showcases for displaying frozen foods and showcases for refrigerated foods (hereinafter referred to as “showcases” unless otherwise specified, collectively refer to these frozen and refrigerated showcases) occupy the sales floor area of the store. The proportion is also increasing.

[0003] In these showcases, food is frozen or refrigerated by cooling air cooled by a cooling unit constituting a refrigeration cycle. This cooling unit connects various devices constituting a refrigeration cycle consisting of a compressor, a condenser, an expansion member, and an evaporator with piping for circulating the refrigerant, and a fan connects the refrigerant in the evaporator to a surrounding medium to be cooled. Heat exchange is performed to cool the medium to be cooled.

[0004] Here, the cooling unit will be briefly described.

[0005] First, a refrigerant is sucked into a compressor and compressed, so as to be in a state of high temperature and high pressure. The high-temperature and high-pressure refrigerant is passed through a condenser such as a capillary tube, and exchanges heat with the outside air to release heat from the refrigerant to liquefy the refrigerant. The liquid refrigerant is adiabatically expanded in an expansion member such as an expansion valve to a low-temperature and low-pressure liquid state.The low-temperature and low-pressure liquid refrigerant passes through the evaporator, and the refrigerant is heated by the medium to be cooled passing around the evaporator. In this way, the medium to be cooled is cooled and the refrigerant is vaporized to return to the original vaporized state. Then, the process of sucking the refrigerant into the compressor again is repeated to cool the medium to be cooled.

Next, a conventional showcase cooling device will be described.

[0007] Each conventional showcase placed in a store has the above-described expansion member, evaporator, fan and various control devices inside. On the other hand, the compressor is disposed in a machine room provided outside the store together with a motor for driving the compressor, and the condenser is disposed in a well-ventilated place such as a rooftop. The compressor and the condenser, the expansion member in each showcase, and the evaporator were connected by a plurality of pipes (refrigerant pipes) for circulating the refrigerant.

In order to connect the compressor to devices in a plurality of showcases, a plurality of pipes must be connected so that refrigerant does not leak so as to branch from the compressor side to each of the showcases. However, the connecting means of the pipe made of the copper pipe has been connected by welding adjacent pipes or connected by connecting members such as screws. In addition, the outer periphery of each pipe was covered with a heat insulating member.

In the conventional showcase cooling apparatus, the high-temperature and high-pressure refrigerant sent from the cooling unit disposed in the machine room through the pipe is supplied to the evaporator in the showcase at the product display portion of the showcase. By exchanging heat with air, the product display section of the showcase was cooled.

By the way, since the surface temperature of an evaporator which is installed in a showcase and exchanges heat with the air in the product display portion of the showcase is generally below freezing, frost adheres to the surface of the evaporator. For this reason, defrosting work called defrost has been performed about once every 3 to 4 hours. This defrost removes the frost on the evaporator by temporarily suspending the cooling of the showcase, and therefore, conventionally, each showcase is provided with the drain water generated as a result of the defrost. One drain pipe for draining
I had to set up one book at a time.

[0011]

The installation of the showcase includes, in addition to the refrigerant piping work and the heat insulating member covering work as described above, a drainage pipe work for providing a drainage pipe near each showcase, and the installation of each showcase. Extensive work such as electrical work to supply power to the equipment is required, and once the showcase is installed, the showcase will move significantly due to securing drain pipes and electrical wiring. It was difficult, and if you wanted to rearrange the showcases, large-scale construction was required, and the cost was high.

Further, in the construction of the refrigerant pipe, when the connection of the pipe is performed by welding, an excessive load is applied to a connecting portion by some external impact, and the pipe is damaged. Even if it is performed, the screw will loosen due to the contraction of the copper pipe due to temperature change,
The refrigerant made of Freon gas sometimes leaked, but since this leak of Freon gas causes destruction of the ozone layer,
It was a serious environmental problem. On the other hand, the number of connection points of the pipes increases as the number of showcases increases, and the possibility of refrigerant leakage increases, so that maintenance is complicated.

Further, as described above, when defrosting is performed to remove frost from the evaporator, the temperature inside the showcase is unavoidably increased by 10 to 15 ° C., but is kept in a chilled state by cooling. Among the fresh foods, there is a problem in quality control of frozen or refrigerated foods, such as a state in which juice called so-called drip exudes to meat and fresh fish. Further, when a failure occurs in each of the devices arranged in the showcase, repair work in the store is inevitable, so that business support may be required.

On the other hand, the vending machines in which a large number of vending machines are installed nationwide also have a built-in cooling unit. Therefore, if a plurality of vending machines are installed in the same place, Problems similar to the problems in the showcase that had occurred.

[0015] The present invention overcomes the above-mentioned problems of the prior art, has low running costs and initial costs, and can effectively utilize the inside of the main body of a showcase and a vending machine for storing goods. It is an object of the present invention to provide a cooling method and a cooling device for a showcase and a vending machine that can be used.

[0016]

According to a first aspect of the present invention, there is provided a method for cooling a showcase, comprising: a cooling unit which cools a cooling unit to a temperature lower than a set temperature of the showcase; The amount of cooling air set according to the opening degree is supplied as a cooling source into the showcase through a supply pipe, mixed with the air in the showcase to cool the inside of the showcase, and as a cooling source, The amount of air in the showcase equal to the amount of cooling air supplied to the cooling unit is set by the opening of the collection cold air valve, collected in the cooling unit via the collection pipe, and the collected air is re-cooled in the cooling unit. it was again used as cooling air, and to maintain a set temperature of the showcase off valve of the supply pipe and the collecting pipe at the same time <br/> off control to And it features.

According to a second aspect of the present invention, there is provided a cooling device for a showcase having a plurality of showcases each having a cooling air outlet and a cooling air inlet, and a compressor, a condenser, and an expansion installed separately from each showcase. A cooling unit having a member and an evaporator to constitute a refrigeration cycle, a supply pipe for supplying cooling air produced by the cooling unit from a cooling air outlet of each of the showcases, and each of the showcases A collection pipe that collects cooling air from the cooling air suction port into the cooling unit, an opening adjustment function that can adjust the opening in order to previously set the flow rate of the supply cool air or the collection cool air, and a showcase. At least one valve for supply cold air having an opening / closing function for automatically controlling the flow of cool air by an arranged temperature control device and a valve for recovered cold air Even without characterized by providing a single valve.

According to a third aspect of the present invention, there is provided a showcase cooling apparatus, wherein a plurality of showcases each having a cooling air outlet and a cooling air inlet are installed separately from each showcase, and a compressor, a condenser, A refrigeration cycle having an expansion member and an evaporator, a regenerator for cooling the circulated brine, and a heat exchanger for introducing brine in the regenerator to exchange heat with air for cooling each showcase. A cooling unit comprising a cool air generating chamber for generating cool air, a supply pipe for supplying cooling air produced in the cool air generating chamber of the cooling unit from a cooling air outlet of each of the showcases, A collection pipe for collecting the cooling unit in the cooling unit in order to pass cooling air from a cooling air suction port of each showcase to a heat exchanger in the cold air generation chamber; Opening adjustment function capable of adjusting the opening in order to set in advance a certain air volume of supply cold air or collecting cold air,
And at least one valve for supplied cool air and at least one valve for recovered cool air having an opening / closing function of automatically controlling the flow of cool air by a temperature control device disposed in the showcase. And

According to a fourth aspect of the present invention, there is provided a cooling device for a showcase according to the third aspect, wherein the regenerator has a regenerator member in which a brine that can be frozen is sealed in a closed container. It is characterized by being fixedly arranged.

According to a fifth aspect of the present invention, there is provided a cooling apparatus for a showcase according to the third or fourth aspect, wherein the heat exchanger is disposed and collected in the cold air generating chamber. There are two mutually independent heat exchange chambers connected with pipes, and each heat exchanger has
The method is characterized in that the brine and hot brine for removing frost are selectively introduced.

According to a sixth aspect of the present invention, there is provided a method of cooling a vending machine, wherein the cooling unit uses a quantity of cooling air which is cooled to a temperature lower than a set temperature of the vending machine and is set by an opening of a supply cool air valve. The vending machine is supplied through a supply pipe, mixed with air in the vending machine to cool the vending machine, and vending the same amount of the cooling air supplied to the vending machine as a cooling source. The air in the machine is set by the opening of the recovery cold air valve and collected in the cooling unit via the recovery pipe, and the recovered air is re-cooled in the cooling unit and used again as cooling air,
The on-off valves of the supply pipe and the recovery pipe are simultaneously opened and closed to maintain the set temperature of the vending machine.

According to a seventh aspect of the present invention, there is provided a vending machine cooling apparatus comprising: a plurality of vending machines each having a cooling air outlet and a cooling air inlet; A cooling unit having a refrigeration cycle having a vessel, an expansion member and an evaporator, a supply pipe for supplying cooling air produced by the cooling unit from a cooling air outlet of each vending machine, A collection pipe that collects cooling air from the cooling air suction port of each vending machine to the cooling unit, and an opening adjustment function that can adjust an opening to set a predetermined amount of supply cool air or recovered cool air in advance; At least one valve for supply cold air and at least one valve for recovered cold air having an opening / closing function of automatically controlling the flow of cold air by a temperature control device provided in the vending machine The is characterized in that provided.

[0023] The cooling device for a vending machine according to claim 8 is provided with a plurality of vending machines each having a cooling air blowout port and a cooling air suction port, and installed separately from each vending machine. A refrigeration cycle having a condenser, an expansion member and an evaporator, a regenerator for keeping the circulated brine cool, and a heat exchanger in which the brine in the regenerator is introduced to exchange heat with air to automatically sell each A cooling unit including a cool air generating chamber for generating cool air for cooling the machine, and supplying cooling air produced in the cool air generating chamber of the cooling unit so as to blow out from a cooling air outlet of each vending machine. A supply pipe, a collection pipe for collecting the cooling air in the cooling unit in order to pass cooling air from a cooling air suction port of each vending machine to a heat exchanger in the cold air generation chamber, and supply cold air or Adjusting can opening adjustment function the opening of the pipes in order to set in advance a certain air volume of the recovery cold,
And at least one valve for supply cold air and at least one valve for recovered cold air having an opening / closing function of automatically controlling the flow of cool air by a temperature control device disposed in the vending machine. And

According to a ninth aspect of the present invention, in the cooling device for a vending machine according to the eighth aspect, a regenerative member in which a brine that can be frozen is sealed in a closed container is fixedly arranged in the cooling tank. I do.

[0025]

According to the cooling method and the cooling device of the present invention, the cooling air of each showcase is introduced into the cooling unit through the recovery pipe to exchange heat with the refrigerant in the evaporator or the brine in the heat exchanger. The cooling air is further supplied to each showcase through a supply pipe, so that the food displayed in the showcase can be cooled without installing equipment constituting a refrigeration cycle in each showcase. it can. Further, the food in each vending machine can be cooled in the same manner for the vending machine.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings.

FIG. 1 schematically shows a showcase cooling apparatus according to the present invention. A plurality of showcases 1 are installed in a store S such as a supermarket.
FIG. 1 shows only one representative showcase 1. This showcase 1 is, as shown in detail in FIG.
A so-called open showcase (hereinafter, referred to as a box-shaped product) in which a part of the front surface is formed in a box shape that is widely opened as a product outlet 2.
Unless otherwise indicated, the product is abbreviated as “showcase”).
The product display unit 3 is formed so as to communicate with the product outlet 2. A plurality of detachable shelves 4, 4... Are arranged at intervals in the vertical direction in the product display section 3, and a box-shaped product display section is provided at the lower end of the product display section 3. Is formed. The showcase 1 includes a conventional condenser, expansion member,
No evaporator is installed, and no drain pipe for drain water recovery is connected. Further, the product display section 3 of the showcase 1 is not limited to the configuration shown in FIG.

Also, the merchandise display section 3 of the showcase 1
The front upper wall 6 has a cooling air outlet 7 for blowing out cooling air as cold air. Similarly, a cooling air inlet 9 for recovering air used for cooling the product display unit 3 is formed in a front lower wall 8 of the product display unit 3. It communicates with an air passage 10 formed at the back of the part 3.

In the air passage 10, an intermediate portion thereof is connected to a distal end portion 12 a of a cooling air supply pipe 12 penetrating the back surface of the showcase 1, and near the cooling air suction hole 9. , A fan 1 for communicating an air passage 10
0a is provided. And
A tip 13a of a cooling air collection pipe 13 is connected to an intermediate portion between the fan 10a and the tip 12a of the supply pipe 12 so as to penetrate the back of the showcase 1.

Returning to FIG. 1, a cooling unit 11 for cooling the product storage section 5 of each of the showcases 1 is provided in a machine room M separated from the store S in which each of the showcases 1 is installed. Is installed. This cooling unit 11
Inside, a compressor (not shown) constituting the refrigeration cycle, an expansion member and an evaporator, a motor for driving the compressor, and the like are arranged. A condenser is installed in a well-ventilated outdoor area (not shown). Note that the compressor and the motor may be separated from the expansion member, the evaporator, and the like, and installed in the machine room M.

Further, a supply pipe 12 for supplying cooling air cooled by heat exchange with the refrigerant in the evaporator in the cooling unit 11 to the product storage section 5 of each showcase 1 is provided in the cooling unit 11. Each end of the supply pipe 12 is communicated with the air passage 10 of each showcase 1 as described above. Further, a collection pipe 13 communicating with the air passage 10 of each of the showcases 1 is connected to the cooling unit 11,
The air in the air passage 10 of each showcase 1 is collected by the cooling unit 11. in this way,
Cooling unit 11 via supply pipe 12 and recovery pipe 13
In the cooling unit 11, a large-capacity supply fan 61 and a large-capacity collection fan (not shown) are arranged in the cooling unit 11 in order to circulate cooling air between the respective showcases 1 and 2.

The supply pipe 12 and the recovery pipe 1
3 is configured by sequentially connecting a large number of heat-insulating wind conduits 14. As shown in FIG. 3, the insulated wind conduit 14 is a cylindrical wind conduit body 1 formed by foaming a heat insulating material such as urethane.
A cylindrical core 1 made of vinyl chloride or other resin is provided on the inner circumference of the central portion of the wind pipe main body 15.
6 is formed to reduce air resistance, and a cylindrical connecting member 17 made of vinyl chloride or other resin is connected to the core 16 at the inner peripheral edge at one end of the wind duct main body 15. It is formed as follows. Then, the supply pipe 12 and the recovery pipe 13 are formed by connecting the ends of the pair of adjacent heat-insulating wind conduits 14 and 14 from the inside by bonding or the like with the connecting member 17. It is desirable that the connecting portions on the outer periphery of the pair of adjacent heat-insulating air conduits 14 be sealed with an adhesive tape (not shown). As an example of the wind conduit body 15, a length of 1 to 1.2 m, an inner diameter of 50 to 600 cm, a thickness of about 30 to 75 mm, and preferably 50 to 75 mm can be considered. Is the cooling unit 1
The main pipe on the one side and the branch pipe on the showcase 1 side are different. It is desirable that the thickness of the wind conduit body 15 be thicker as the cold air temperature is lower.

On the other hand, the supply pipe 12 and the recovery pipe 1
3, a T-shaped insulated air conduit 14A as shown in FIG. 4, an L pipe (not shown), a 45 ° L
A tube, a Y tube, or the like may be used. This insulated wind conduit 14A and other shaped wind conduits are similar to the insulated wind conduit 14 described above.
It has a cylindrical air duct main body 15A in which a heat insulating material such as urethane is foamed, and a core body 16A is formed on the inner periphery of the center in the same manner as the air duct (straight pipe) shown in FIG. I have. The heat-insulating wind conduit 14A is also connected to the other heat-insulating wind conduits 14 and 14A by bonding a connecting member 17A such as the connecting member 17.

The connecting members 17 are attached to all three ends of the heat-insulating wind conduit 14A shown in FIG. 4, and the heat-insulating wind conduit 14A is connected to the connecting members 1 of the other heat-insulating wind conduits 14, 14A.
The ends not provided with 7 are connected. In addition, connecting members 1 are not necessarily provided at all three ends of the heat-insulating wind conduit 14A.
Of course, it is not necessary to provide 7.

The cooling air produced by the cooling unit 11 is circulated between the cooling unit 11 disposed in the machine room M and the showcase 1 disposed in the store S, and Supply pipe 12 for supplying to case 1
Then, the piping work of the collecting pipe 13 for collecting the frozen air from the showcase 1 is performed. This operation is performed by connecting the connecting member 17 of the insulating wind conduits 14 and 14A to the adjacent insulating wind conduit 1.
4, 14A are inserted into the ends of the wind duct main bodies 15, 15A, and the connecting member 17 is glued to the heat insulating wind ducts 14, 14A.
A by bonding with A.
The connection portion of 4, 14A is sealed with an adhesive tape to reinforce it. In addition, these pipes 14 and 14A are provided in places that are hard to be seen by the public, such as the inside of the ceiling, and do not hinder the walking of the shopper or the carrying in of goods.

Next, the operation of the embodiment having the above-described configuration will be described.

First, a low-temperature and low-pressure liquid refrigerant in the cooling unit 11 is supplied to an evaporator (not shown). Then, the cooling air from each showcase 1 collected in the cooling unit 11 through the collecting pipe 13 is further cooled by heat conversion with the liquid refrigerant passing through the evaporator, and provided in the cooling unit 11. And supplied into the supply pipe 12 by the fan. The cooling air supplied into the supply pipe 12 passes through the supply pipe 12, from the cooling air blow-out port 7 of each showcase 1, which is an opening thereof, to the product display section 5.
To be blown out. Since each cooling air outlet 7 is provided at the upper part of the front surface of the showcase 1, the cooled air flows downward from above the product display portion 5 of the showcase 1 downward. The product display section 5 and the product are cooled. Then, the air provided for cooling from the cooling air suction port 9 provided on the lower front surface of the showcase 1 by the suction force of another fan provided on the cooling unit 11 is collected through the back of the product display unit 5. It is sucked into the pipe 13 and returned to the cooling unit 11 again through the recovery pipe 5. In this way, the cooling air is circulated between the cooling unit 11 and each showcase 1 by passing through the supply pipe 4 and the recovery pipe 5 formed of the adiabatic air conduits 14 and 14A, and the product display of each showcase 1 is performed. The product in the section 5 is cooled to a predetermined temperature.

It should be noted that there is also a difference in the desired cooling temperature from the viewpoint of food management. When the showcase 1 is used as a freezer, the temperature is preferably about −25 ° C., and fresh food such as meat and fresh fish is preferably used. It is said that it is preferable to cool daily products such as milk and tofu to about −3 ° C. as a refrigerator to about 10 ° C.

Therefore, in the present embodiment, two cooling units 11 are provided for a frozen food freezer and a fresh food freezer and a daily delivery refrigerator, and cooling air at a predetermined temperature is supplied to a desired showcase 1. And the showcase 1 is used as a freezer or a refrigerator. Note that, even when two cooling units 11 are provided, the compressor can be shared.

As described above, in the showcase cooling apparatus of this embodiment, the showcase 1 is a display shelf having a simple structure having only the cooling air outlet 7 and the suction port 9, and is provided with an evaporator. It does not require drain pipe construction, special electrical work and refrigerant piping work,
The showcase 1 can be easily moved to a desired position. Insulated wind conduits 14 and 14A connecting the cooling unit 1 in the machine room M and the showcase 1 in the store S.
Can be piped by a simple operation, and the adiabatic air conduits 14 and 14A can be formed at low cost.

In this embodiment, the refrigeration cycle is integrated in the machine room M by concentrating the devices such as the expansion member and the evaporator, which are conventionally provided for each showcase, in the machine room M. The number of manufacturing parts of the case itself is reduced, and manufacturing costs can be reduced. In other words, if 100 showcases are conventionally used, the evaporator, the expansion member, and the like are required to be a fraction of each showcase.
In contrast to the case where 00 pieces were required, in this embodiment,
Not only the number of showcases but also a single one (for one set temperature) provided in the machine room M can perform a sufficient function. Further, the simplified structure of the showcase itself reduces the installation space for the showcase 1,
The floor space of the store can be effectively used.

Further, since the refrigeration cycle is concentrated in the machine room M, it is not necessary to perform the work of the refrigerant pipe, the drain pipe and the electric wiring of the cooling unit 11 for each showcase, thereby reducing equipment costs. In addition to this, it is possible to reduce operation and maintenance costs such as maintenance for preventing failures. In addition, since the refrigerant pipe is formed in the machine room and is almost permanent, there is no possibility that Freon gas as refrigerant leaks when the showcase 1 moves as in the related art, and furthermore, the refrigerant pipe does not leak. Since the distance is much shorter than before, the number of connection points of the refrigerant pipe is also reduced, the gas leakage of the refrigerant can be reduced, and further, it is not necessary to calculate the pressure loss in the refrigerant pipe in the capacity calculation, The ability can be increased by about 25 to 30%.

Since it is not necessary to perform defrosting in the showcase by the centralized control in the machine room, the temperature control in the showcase is improved, so that no dripping occurs and the quality control of the product can be ensured. .

It is needless to say that this embodiment can be applied to cooling of a vending machine.

FIGS. 5 to 13 show a second embodiment of the present invention. FIG. 5 shows an example of a showcase for use in the second embodiment of the present invention, and FIG. 1 schematically shows a cooling unit 11 of an example.

In this embodiment, as shown in FIG.
A cooling air passage 18 formed in a U-shape along the upper surface, the back surface, and the lower surface of the product display portion 3 is provided on the back side of the product display portion 3 of the showcase 1. An intermediate portion 18 is connected to a distal end portion 12a of a cooling air supply pipe 12 penetrating the back surface of the showcase 1, and the distal end portion 12a is formed of, for example, urethane or the like as shown in FIG. A cool air blow-out duct 19 formed into a cylindrical shape by a heat insulating member is connected by being bent 90 degrees so as to be horizontally disposed in the width direction of the showcase 1. The cool air blow-out duct 19 has a plurality of cool air blow holes 20, 20... Formed so as to blow cool air supplied from the supply pipe 12 upward at the upper part of the heat insulating member formed in a cylindrical shape. The lower part also blows cool air downward, and also has a cool air blowing duct 1.
9 has a plurality of discharge holes 21, 21... Formed so as to drain water.

The upper end of the cooling air passage 18 has
The cooling air passage 18 is opened in front of the commodity display section 3.
A cooling air outlet 22 for blowing the cooling air downward is connected to a lower end portion of the cooling air passage 18, and a front end portion of the cooling air passage opening to the front of the commodity display portion 3 and cooling air flowing through the cooling air passage 18. Is formed as a cooling air suction port 23 for sucking air. A cooling air outlet duct 19 connected to the tip 12a of the cooling air supply pipe 12 in the cooling air passage 18
Of the cooling air suction port 23 from the disposition position of
Are formed in the partition plate 24 and the cooling air passage 1
8 is provided.

The fan 25 in the air passage 18
A tip 13 a of a cooling air collection pipe 13, which is provided so as to penetrate the rear surface of the showcase 1, is connected to an intermediate portion of a position where the tip 12 a of the supply pipe 12 is provided. An air collection duct (not shown) formed into a cylindrical shape by a foaming heat insulating member is connected to the tip end portion 13a by bending it 90 degrees so as to be horizontally disposed in the width direction of the showcase 1. ing. This air collecting duct has a plurality of suction holes for sucking air in the showcase 1 collected in the cooling air passage 18 by the fan 25 below a heat insulating member formed in a cylindrical shape. I have. It is assumed that the arrangement area of the suction holes is equal to the total arrangement area of the cool air discharge holes 20 and the discharge holes 21 provided in the cool air discharge duct 19.

The cold air outlet duct 19 and the air recovery duct are connected to the distal end 12a of the supply pipe 12 and the distal end 13a of the recovery pipe 13 connected to the air passage 10 shown in the first embodiment. Can be connected in the same manner.

The cooling air passage 1 of the showcase 1
8, a guide air passage 26 also formed in a U-shape along the cooling air passage 18 is disposed along the cooling air passage 18, and the upper end of the guide air passage 26 is provided with the cooling air outlet 22. A guide air outlet 27 which opens to the front and blows out the air in the guide air passage 26 downward, and a front end connected to the lower end of the guide air passage 26 is adjacent to the front of the cooling air inlet 23. A guide air suction port 28 that opens to the inside and sucks air in the product display unit 3. A fan 30 for circulating guide air is provided in the guide air passage 26 near the guide air suction port 28.
Are provided so as to be supported by the support plate 29.
The guide air passage 26 may not be provided depending on the type of the showcase 1.

An external air passage 31 is provided above the guide air passage 26 serving as an upper end portion in the showcase 1. One end of the external air passage 31 is in front of the guide air outlet 27. An external air outlet 32 that opens to the side and blows out external air supplied to the external air passage 31 downward;
A fan 33 that takes in external air into the external air passage 31 is provided on the rear side of the top plate of the showcase 1 that forms the upper surface of the external air passage 31.

At the uppermost portion of the back of the product display section 3 of the showcase 1, a detection section 34 of a thermostat T for controlling and managing the temperature in the product display section 3 is provided.

Before the first operation, the supply pipe 12 and the recovery pipe 1 are connected to the supply pipe 12 and the recovery pipe 13.
After measuring the internal pressure in the pump 3, the air amount control means is used as a manual opening control valve 49 for adjusting the opening so that the supplied cooling air amount and the recovered air amount become substantially equal.
And an opening / closing valve 50 as a cold air circulation automatic opening / closing means which is automatically opened / closed by a motor Mo connected to the thermostat T provided in the showcase 1. The supply pipe 12 and the recovery pipe 13
When the temperature inside the showcase 1 detected by the detection unit 34 of the thermostat T disposed inside the showcase 1 rises above the upper limit set temperature, the supply pipe 12 and the collection pipe 50 13 are simultaneously opened, and when the thermostat T detects the lower limit set temperature, the on / off valves 50 of the supply pipe 12 and the recovery pipe 13 are controlled to be simultaneously closed. The manual opening control valve 49 for adjusting the opening of the valve and the on-off valve 50 for automatically opening and closing the valve in conjunction with the thermostat T provided in the showcase 1 are the same as the thermostat. The motor Mo connected to T is a step motor, and can be replaced with a single automatic opening control valve which is connected to the step motor and has both a function of controlling the opening of the valve and a function of opening and closing. The opening control valve 49 and the on-off valve 5
0 may be provided in the showcase 1.

As shown in FIG. 6, in the present embodiment, as in the first embodiment, each of the showcases is placed in a machine room M separated from the store S in which each showcase 1 is installed. A cooling unit 11 for cooling the product storage section 5 of the case 1 is provided.

The cooling unit 11 includes a casing 35a containing a refrigeration cycle 35 comprising a compressor, a condenser, an expansion member and an evaporator,
Regenerator 3 for keeping the brine cooled by 5 cool
6 and a cool air generation chamber 37 that generates cooling air by performing heat exchange between the brine circulating in the heat exchanger 39 and the surrounding medium to be cooled. The condenser of the refrigeration cycle 35 is separately provided on a roof or the like as a cooling tower or the like.

The cooling unit 11 in this embodiment connects various devices constituting a refrigeration cycle 35 including a compressor, a condenser, an expansion member and an evaporator with two pipes (not shown) for circulating a refrigerant. The refrigerating cycle 35 is connected to a regenerator 36 provided with a regenerative member 38 and two pipes P1 and P1 for circulating brine. The exchanger 39 is connected to two pipes P2 and P2 for circulating brine, respectively.
The brine is circulated between the casing 35a, the cold storage tank 36, and the cold air generation chamber 37 by a pump (not shown).

Here, the cooling unit 11 will be further described.

First, in order to cool the brine, which is a cooling refrigerant, by the above-described refrigeration cycle 35, the brine is contacted with the evaporator of the refrigeration cycle 35 to exchange heat in the casing 35a, though not shown. It is configured. In this embodiment, it is desirable to use a calcium chloride solution having a property that viscosity is hardly produced or an ethylene glycol solution as the brine.

A regenerator tank 36 is connected to the refrigerating cycle 35 with two pipes P1 and P1 for circulating brine.
For example, ethylene glycol is mixed with water, and the temperature is slightly higher than the cooled calcium chloride solution (−30 ° C. to −30 ° C.).
A plurality of regenerative containers 38a, 38a enclosing those frozen at 40 ° C.) are arranged in an array. The direction of alignment of the cold storage container 38a is as follows.
5a, the direction is parallel to the opposed wall surfaces 36a, 36a of the cold storage tank 36 to which the pipes P1, P2 are connected in order to facilitate the flow between the cold storage tank 36 and the cold air generation chamber 37. In addition, as the brine, there are polypropylene glycol, sodium chloride, magnesium chloride and the like in addition to the calcium chloride and ethylene glycol.

In the regenerator 36, a heat exchanger 39 is provided with two pipes P2 and P2 for circulating brine.
Is connected to each of the pipes P2.
1. An on-off valve 50 automatically opened and closed by a motor (not shown) connected to the thermostat T disposed in
A and a pump 51 for circulating the cooled brine in the cold storage tank 36 are provided. The on-off valve 50A and the pump 51 provided in the pipe P2 are connected to the pipe P when the temperature of the generated cool air detected by the thermostat T provided in the cool air collecting chamber 41 rises above the upper limit set temperature.
When the thermostat T detects the lower limit temperature, the on / off valve 50A of the pipe P2 is closed and the driving of the pump 51 is stopped. .

In this embodiment, the cold air generating chamber 37 is provided with two heat exchange chambers 40, 40 each having a cooling fin coil 39a for circulating the brine, as shown in FIG. I have. Further, a cold air collecting chamber 41 is provided adjacent to the heat exchange chambers 40, 40 via a partition 42, and the cold air flows through the partition 42 between the heat exchange chambers 40, 40 and the cold air collecting chamber 41. Is formed. As shown in FIG. 9, the fan 43 is disposed above the partition wall 42 in the cool air generation chamber 37, and is capable of remotely controlling the ventilation between the heat exchange chamber 40 and the cool air collection chamber 41. And a shutter 44 that can be opened and closed by the shutter.

The cool air generated in the heat exchange chambers 40, 40 is collected in the cool air collection chamber 41 by driving a fan 43 disposed in a partition 42 between the heat exchange chambers 40, 40 and the cool air collection chamber 41. Can be

It is of course possible to perform the cooling operation in the two heat exchange chambers 40 and 40 simultaneously. However, in this embodiment, the heat exchanger 3 of one of the heat exchange chambers 40 is not used.
9 is used to cool the air, and the other heat exchange chamber 40 is used.
The two heat exchange chambers 40 and 40 are used alternately by performing maintenance such as defrosting of the heat exchanger 39 as necessary, or in a standby state for an emergency.

At the time of defrosting, a shutter 44 provided on a fan 43 provided in a partition 42 between the heat exchange chamber 40 and the cold air collecting chamber 41 where defrosting is performed is closed, so that defrosting is performed. In this case, it is possible to prevent the warm air generated at this time from entering the cold air collecting chamber 41.

A pipe P2 for circulating brine through the heat exchanger 39 is connected to a pipe P3 for supplying and recovering hot brine separately provided for defrost, and is interposed in the pipe P3. The defrosting is performed by opening and closing the defrosting valve 45.
The calcium chloride solution as the brine is sealed in the pipe P3, and the brine in the pipe P3 is
In the refrigeration cycle 35, heat exchange is performed with a coil through which a high-temperature and high-pressure refrigerant gas before reaching the condenser flows. The heat exchange with the refrigerant gas causes the hot brine to reach a temperature of about 40 ° C. It is designed to hold. Note that the temperature control of the hot brine is achieved by providing a bypass in the pipe P3 and performing heat treatment with the refrigerant gas as needed. Instead of the defrost valve 45, a three-way valve combining the defrost valve 45 and a manual opening adjustment valve 49 may be used.

Further, the cooling air which has been cooled by heat exchange with the brine in the heat exchange chamber 40 in the cold air generation chamber 37 and introduced into the cold air collection chamber 41 is supplied to the product display section 3 of each of the showcases 1. The supply pipe 12 is connected to the cool air collection chamber 41 of the cooling unit 11, and the tip 12 a of the supply pipe 12 is connected to the cooling air passage 18 of each of the showcases 1 as described above.

An air flow sensor 60 is provided in the supply pipe 12 in the vicinity of the cold air collection chamber 41, and when the supply of cooling air becomes equal to or less than a set value, the air flow sensor 60 is turned off. The drive of the motor Mo of the fan 61 which is installed in the collection chamber 41 and sends the cooling air to the supply pipe 12 is inverter-controlled, so that the motor Mo of the fan 61 is prevented from being overloaded.

Further, the collection pipe 13 communicating with the product storage section 5 of each of the showcases 1 is connected to the cold air generation chamber 37.
, And the air in the product storage section 5 of each showcase 1 is collected in the cool air generation chamber 37 of the cooling unit 11. As described above, in order to circulate the cooling air between the cooling unit 11 and each showcase 1 through the supply pipe 12 and the recovery pipe 13, the cooling unit 11 includes a supply unit (not shown) other than the fan 43. In addition, a large capacity fan for recovery is provided.

The peripheral wall 46 of the cold air generating chamber 37 is formed by a heat insulating panel, and
As shown in FIG. 7, a ceramic plate 47a for preventing frost formation is stuck on the surface. When cold air is applied to the ceramic plate 47a, the ceramic of the ceramic plate 47a has the property of preventing the development of ice crystals contained in the cold air, so that frost formation on the ceiling 47 can be prevented. it can. On the ceiling 47 of the cool air collecting chamber 41, a wind stimulating plate 48 having the ceramic plate 47a adhered to the surface thereof is disposed in an inclined manner.
Is directly received by the cool air blown out from the fan 43 disposed in the air conditioner. By doing so, it is possible to prevent frost from forming on each part other than the ceiling inside and outside the cold air collection chamber 41.

As described above, the thermostat T for detecting the temperature of the generated cold air and controlling the opening and closing of the on-off valve 50A and the driving of the pump 51 provided in the pipe P2 is provided in the cold air collecting chamber 41. Has been established.

The supply pipe 12 and the recovery pipe 13 are
It is configured by sequentially connecting a large number of insulated wind conduits 14,
The structure of the adiabatic air conduit 14 and the like is the same as in the first embodiment. Then, the cold air generation chamber 3 disposed in the machine room M
A supply pipe 12 for supplying cooling air introduced into the cold air collecting chamber 41 of the cold air generating chamber 37 to the showcase 1 so as to circulate between the showcase 1 and the showcase 1 disposed in the store S; The piping work of the collecting pipe 13 for collecting the cooling air from the showcase 1 is performed. However, in this embodiment, the heat-insulating air conduit 14 using a metal member such as stainless steel as the core body 16 is not used at all in the supply pipe because there is fear of dew condensation.

FIG. 10 is a perspective view showing the on-off valve 50, FIG. 11 is a sectional view taken along a line aa, and FIG.
FIG. 1 is a sectional view taken along line bb of FIG.

The valve main body 52 of the on-off valve 50 is mounted on the air conduit 14, and a circular valve plate 53 that closes the heat-insulating air conduit 14 to block the ventilation is provided inside the main body 52.
Is an insulation shaft (insulated shaft) 54 described later.
Are disposed so as to be rotatable in the horizontal direction around the axis. A semicircular valve seat 55 is provided on the inner peripheral portion of the heat-insulating air conduit 14 in which the valve plate 53 is disposed, as shown in FIG.
Are arranged so as to abut against the semicircular portion of the valve plate 53 from one surface direction, and to abut the other semicircular portion from the other surface side of the valve plate 53. The semicircular valve seat 55 functions as a stopper for rotating the valve plate 53 in one direction when the valve plate 53 is opened. When the valve plate 53 is closed, the circumference of the valve plate 53 is reduced. It comes into contact with the portion to block ventilation from around the valve plate 53 and also functions as a seal member for preventing the valve plate 53 from freezing in a closed state by cooling air supplied to the showcase 1. I have.

The insulation shaft 54
Extends upward from the upper end of the valve plate 53 and extends
The rotation shaft 56 of the motor is connected to the upper end of the insulation shaft 54. The insulation shaft 54 and the rotation shaft 56 are housed inside a motor mounting table 57 having a substantially rectangular cross section and formed of a heat insulating member integrally formed above the main body 52.

The insulated air conduit 14 is connected to the on-off valve 5.
In the portion where the 0 is installed, the upper and lower portions are divided in half, and the valve plate 53 of the on-off valve 50 and the like are mounted in the insulated air conduit 14 and then the insulated air conduit 14 is bonded and formed into an annular shape. Is done.

In the vicinity of the motor mounting table 57, a small-diameter hole is formed as an airflow measuring port 58 toward the center of the wind pipe 14, and the airflow is measured from the airflow measuring port 58 before the first operation. The meter is inserted into the wind conduit 14 to detect the air volume and the wind speed. Then, based on the detection result, the opening of the opening control valve 49 provided in the wind conduit 14 is manually adjusted to obtain an appropriate supply and recovery amount of cool air. In addition, this air volume measurement port 5
After the opening control valve 49 is set appropriately once, the plug 8 is usually closed with an appropriate plug 59.

It should be noted that various components such as the insulation shaft of the air volume adjusting damper constituting the on-off valve 50 are also formed of a heat insulating material such as urethane or polyester having a low thermal conductivity.

Next, the operation of the present embodiment having the above-described configuration will be described.

First, a low-temperature and low-pressure liquid refrigerant is supplied to an evaporator (not shown) in a refrigeration cycle 35 in the cooling unit 11 and is brought into contact with brine. Cool to 50 ° C. Then, the cooled brine is circulated through the pipe P1 to the regenerator 36, and the cooled brine is recirculated to the regenerator 36.
Keep cool.

In the regenerator 36, -40 ° C. to -50
The regenerator vessel 38a, which contains a mixture of ethylene glycol and water adjusted to freeze at -30 ° C to -40 ° C slightly higher than the calcium chloride solution by the calcium chloride solution cooled to 0 ° C, freezes. In the case where the degree of cooling of the calcium chloride solution is somewhat loosened due to circulating use as brine, the regenerative storage container 38a inverts the calcium chloride solution from −40 ° C. to −50 ° C.
It will function as a cold storage member 38 that cools to a degree. Therefore, it is not necessary to always drive the refrigeration cycle 35. In other words, the refrigeration cycle 3 is performed only when the calcium chloride solution has reached a temperature at which the cooling air at a predetermined temperature cannot be generated in the cooling air generation chamber 37.
5 is driven to cool the calcium chloride solution, and the on-off valve 50 arranged on the pipe P2 is opened and closed to circulate the calcium chloride solution. Therefore, the liquid mixture of ethylene glycol and water in the cold storage container 38a is frozen using inexpensive late-night power, and during the daytime, only when the brine temperature falls below the set temperature, the refrigeration cycle 35
Should be driven.

The cooling air from each showcase 1 collected in the cool air collecting chamber 41 of the cooling unit 11 through the collecting pipe 13 is transferred to the brine passing through the cooling fin coil 39a in the cool air generating chamber 37 and heat. The cooling is further performed by replacement, and is supplied into the supply pipe 12 by a fan (not shown) provided in the cooling unit 11. The cooling air supplied into the supply pipe 12 is supplied to the supply pipe 12
Through the cooling air passage duct 18 of the cooling air passage 18 of each showcase 1 which is the opening, and is uniformly blown into the cooling air passage 18 and further blown out from the cooling air outlet 7 to the commodity display portion 3. become. Since each of the cooling air outlets 7 is provided in the upper part of the front surface of the showcase 1, the cooled air flows downward from above the product display portion 3 of the showcase 1 downward. The product display unit 3 and the product are cooled. Then, the air provided for cooling is sucked into the collection pipe 13 from the cooling air suction port 9 provided in the product storage section of the showcase 1 by the suction force of another fan provided in the cooling unit 11, and the collection pipe 13 13 and is returned to the cooling unit 11 again.

As described above, the cooling air is supplied to the cooling unit 11.
And the respective showcases 1 are circulated by passing through supply pipes 12 and recovery pipes 13 composed of heat-insulating air conduits 14 and 14A, and the products in the product display section 5 of each showcase 1 are brought to a predetermined temperature. Cooling. On the other hand, the air provided for cooling is sucked into the cooling air passage 18 from the cooling air suction port 9 a provided in the front lower wall 8 of the product display unit 3 by the fan 25, and supplied in the cooling air passage 18. It is mixed with the cooling air sent from 12 and used again as cooling air.

Further, the product display section 3 of the showcase 1
From the guide air outlet 7b and the outside air outlet 7c provided on the front upper wall 6, guide air and outside air are blown out as an air curtain for ensuring the pressure balance between the cooling air and the outside air. The guide air and the surrounding semi-cooled air flow from the guide air inlet 9 b provided in the front lower wall 8 of the product display section 3 to the guide air passage 26.
The air is sucked by the fan 30 into the guide air passage 26.
It passes through the inside and is again provided as guide air from the guide air outlet 27.

The supply amount and the recovery amount of the cooling air are made substantially equal by adjusting the opening degree of each opening control valve 49 of the supply pipe 12 and the recovery pipe 13.
With the guide air and the outside air as an air curtain that blows out in front of the air, the adjustment of the imbalance in the pressure between the outside air and the cool air is performed.

The refrigeration cycle 35 in the cooling unit 11 is driven to cool the inside of the showcase 1, and once the temperature in the showcase 1 falls to the lower limit set temperature, the temperature in the showcase 1 is managed. The motor Mo of the on-off valve 50 connected to the thermostat T to be connected and disposed on the supply pipe 12 and the recovery pipe 13 is stopped, and the valve plate 53 inside the on-off valve 50 is brought into contact with the valve seat 55 for heat insulation. The ventilation of the air duct 14 is shut off. When the temperature in the showcase 1 rises above the set temperature, the on-off valve 50 connected to the thermostat T for managing the temperature in the showcase 1 and disposed in the supply pipe 12 and the recovery pipe 13 is shown. Not by motor driven
When the valve plate 53 in the on-off valve 50 is rotated by approximately 90 degrees, the adiabatic air duct 14 is ventilated, and the showcase 1
It supplies cool air to the inside and collects cool air used for cooling in the showcase.

In this embodiment, as in the first embodiment described above, by providing two cooling units 11 for a frozen food freezer, a fresh food freezer, and a refrigerator for daily delivery, a predetermined temperature can be obtained. Of cooling air is supplied to a desired showcase 1 by a supply pipe 12,
Can be used as a freezer or a refrigerator.

Further, the showcase 1 can be easily moved to a desired position, and the insulated wind conduits 14 and 14A connecting the cooling unit 1 in the machine room M and the showcase 1 in the store S are also provided. Piping can be done with simple work.

Since the refrigeration cycle 35 conventionally provided for each showcase 1 has been integrated into the machine room M, the number of parts for manufacturing the showcase 1 itself is reduced, and the manufacturing cost can be reduced. . Furthermore, since the structure of the showcase itself is simplified, the installation space for the showcase 1 is reduced, and the sales area of the store S can be effectively used.

Further, since the refrigeration cycle is concentrated in the machine room M, it is not necessary to construct the refrigerant pipes, drain pipes, and electric wiring of the cooling unit 11 for each showcase 1, thereby reducing equipment costs. In addition to this, it is possible to reduce operation and maintenance costs such as maintenance for preventing failures. Further, since the refrigerant pipe is formed in the machine room M and is almost permanent, there is no possibility that the CFC gas as the refrigerant leaks when the showcase 1 moves as in the conventional case. Is significantly shorter than before, so the number of connection points of the refrigerant pipes is reduced, and the leakage of refrigerant gas can be reduced.

Further, the conventional cooling device requires a considerable amount of refrigerant piping, and even if the cooling device is driven at 10 horsepower or less, for example, when the refrigerant piping is 80 m long, the capacity is about 30%. The cooling device of the present embodiment is designed to be compact and need not consider the reduction of the capacity because the pressure loss of the pipe length does not occur.

[0091] Centralized control in the machine room M eliminates the need to perform defrost in each showcase 1, so that temperature control in the showcase 1 is improved, so that dripping does not occur and quality control of products is ensured. can do.

Further, the cooling of the brine used in the present embodiment can be performed by using late-night power, and the refrigerating cycle 35 can be performed by using the cold storage container 38a frozen in the cold storage tank 36 as the cold storage member 38 of the brine. It is not necessary to constantly drive the power supply, and the total cost for power can be reduced to 40 to 50% of the conventional showcase.

Further, in the method of performing heat exchange between brine and air using the cooling fin coil 39a for heat exchange for generating cooling air, the heat exchange efficiency is improved because the brine as the refrigerant is liquid, and the conventional heat exchange efficiency is improved. The size of the evaporator can be reduced to about 1/3.

The present invention is not limited to the above embodiment, but can be modified as needed. For example, the present invention is not limited to the cooling of the open showcase described in the embodiment, but can be applied to the cooling of a vending machine as it is, and a closed case in which a door is provided on the front as a showcase. Types can also be used. However, in the cooling device of a vending machine, it is not always necessary to provide two cold air generation chambers.

[0095]

According to the present invention, the cooling device can be concentrated in the machine room, the pressure loss of the refrigerant pipe length of the cooling device does not occur, and the cooling of the brine can be performed by using the power at midnight. Therefore, the total power cost is 40 ~
It can be reduced by 50%. In the case of a showcase, refrigerant piping work, electrical work or drainage work in the store can be omitted, and the showcase can be easily moved in the store and associated piping work can be easily performed.
And since the cooling device of the present invention circulates the cooling air to the showcase, the refrigerant does not leak out of the piping on the way and can contribute to environmental problems. Also, showcases or vending machines with a simplified structure,
In the same volume, the amount of stored goods can be increased,
If the product storage amount is the same, the volume can be reduced,
In the case of a showcase, it is possible to secure a large sales floor area of the store. By arranging the refrigeration cycle as a cooling unit in the machine room in a concentrated manner, since there is no need for defrosting in each showcase and each vending machine, freshness management of stored goods is improved.
Furthermore, there are effects such as a reduction in the number of cooling-related parts, a drastic reduction in failure frequency, and a reduction in operation and maintenance costs such as maintenance.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing a first embodiment of a showcase cooling device for implementing a showcase cooling method of the present invention.

FIG. 2 is a longitudinal sectional view of the showcase according to the first embodiment of the present invention.

FIG. 3 is a perspective view of an insulated wind conduit of the present invention.

FIG. 4 is a perspective view of another type of insulated wind conduit of the present invention.

FIG. 5 is a longitudinal sectional view of a showcase showing a second embodiment of the showcase cooling device of the present invention.

FIG. 6 is an explanatory diagram showing a configuration of a cooling unit according to a second embodiment of the present invention.

FIG. 7 is a perspective view showing a configuration of a cool air blowing duct.

FIG. 8 is a plan view showing the structure of a cool air generation chamber.

FIG. 9 is an explanatory diagram showing a relationship between a fan in the cold air collecting chamber and a wind baffle

FIG. 10 is a perspective view showing a configuration of an air volume adjustment damper.

11 is a sectional view taken along line aa of FIG.

FIG. 12 is a partial longitudinal sectional view taken along line bb of FIG. 11;

FIG. 13 is an explanatory view showing rotation of a valve plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Showcase 5 Commodity storage part 7 Cooling air outlet 9 Cooling air suction port 10 Air passage 10a Fan 10b Partition plate 11 Cooling unit 12 Supply piping 13 Recovery piping 14, 14A Insulated wind conduit 15, 15A Wind conduit main body 16 Core 17 Connecting member 18 Cooling air passage 19 Cool air outlet duct 22 Cooling air outlet 23 Cooling air inlet 24 Partition plate 25 Fan 26 Guide air passage 27 Guide air outlet 28 Guide air inlet 29 Partition plate 30 Fan 31 External air passage 32 External Air outlet 33 Fan 35 Refrigeration cycle 36 Cold storage tank 37 Cold air generation chamber 38 Cold storage member 38a Cold storage container 39 Heat exchanger 39a Cooling fin coil 40 Heat exchange chamber 41 Cold air collection chamber 42 Partition 43 Fan 44 Shutter 47a Ceramic plate 48 Winding plate 49 Opening control valve 0 off valve 51 pump 53 valve plate 54 Insulation shaft 55 valve seat 56 rotation shaft 57 motor mount 58 air volume measurement port 59 plug 60 airflow sensor 61 Fan S store M machine room T Thermostat Mo motor P1, P2 piping

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location F25D 17/08 318 F25D 17/08 318B G07F 9/10 101 G07F 9/10 101Z

Claims (9)

(57) [Claims] 1. A cooling unit, which is cooled to a temperature lower than a set temperature of a showcase and supplies cooling air of an amount set by an opening of a supply cool air valve as a cooling source into the showcase via a supply pipe, The inside of the showcase is cooled by mixing with the air in the case, and the amount of air in the showcase equal to the amount of the cooling air supplied to the showcase as a cooling source is set according to the opening of the recovery cold air valve. To the cooling unit via a collecting pipe, and the collected air is re-cooled in the cooling unit and used again as cooling air, and the supply pipe and the collecting pipe are opened.
A method for cooling a showcase, wherein a closing temperature of the showcase is maintained by simultaneously controlling opening and closing of a valve . 2. A plurality of showcases each having a cooling air outlet and a cooling air inlet, and a compressor, a condenser, and a compressor installed separately from each showcase.
A cooling unit having an expansion member and an evaporator to form a refrigeration cycle; a supply pipe for supplying cooling air produced by the cooling unit from a cooling air outlet of each of the showcases; A collection pipe for collecting cooling air from the cooling air suction port of the case to the cooling unit, an opening adjustment function capable of adjusting an opening to set the amount of supplied cool air or collected cool air in advance to a constant value, and in the showcase. A showcase provided with at least one valve for supplied cool air and at least one valve for recovered cool air having an opening / closing function of automatically controlling the flow of cool air by a temperature control device disposed in the refrigerator. Cooling system. 3. A refrigeration cycle including a plurality of showcases each having a cooling air outlet and a cooling air inlet, and a refrigeration cycle having a compressor, a condenser, an expansion member, and an evaporator installed separately from each showcase. Storage tank that keeps the brine cooled, and a cool air generation chamber that has a heat exchanger into which the brine in this storage tank is introduced and exchanges heat with air to generate cool air for cooling each showcase. A cooling unit, a supply pipe for supplying cooling air produced in the cooling air generation chamber of the cooling unit from a cooling air outlet of each of the showcases, and cooling air from a cooling air suction port of each of the showcases A collection pipe for collecting the cooling air in the cooling unit so as to pass the heat through the heat exchanger in the cold air generation chamber; At least one valve for supply cold air having an opening adjustment function capable of adjusting an opening degree for setting, and an opening / closing function of automatically controlling the flow of cool air by a temperature control device disposed in the showcase; and A cooling device for a showcase, comprising at least one valve for recovered cold air. 4. The cooling device for a showcase according to claim 3, wherein a regenerative member in which brine that can be frozen is sealed in a closed container is fixedly arranged in the regenerator. 5. The heat exchanger is provided in the cold air generation chamber, and two independent heat exchange chambers to which a recovery pipe is connected are provided. The cooling device for a showcase according to claim 3 or 4, wherein the brine and hot brine for removing frost are selectively introduced. 6. A cooling unit, wherein the cooling air is cooled to a temperature lower than a set temperature of the vending machine and a cooling air of an amount set by an opening of a supply cool air valve is supplied as a cooling source into the vending machine through a supply pipe; While mixing the air in the vending machine to cool the inside of the vending machine, the same amount of cooling air supplied to the vending machine as a cooling source is recovered in the vending machine in an amount equal to the amount of cooling air. Set and collect in the cooling unit via the collection pipe, re-cool the collected air in the cooling unit and use it again as cooling air, and simultaneously control the opening and closing valves of the supply pipe and the collection pipe. And maintaining the set temperature of the vending machine by cooling the vending machine. 7. A refrigeration cycle having a plurality of vending machines each having a cooling air outlet and a cooling air inlet, and a compressor, a condenser, an expansion member, and an evaporator installed separately from each vending machine. A cooling unit, a supply pipe for supplying cooling air produced by the cooling unit from a cooling air outlet of each vending machine, and cooling from a cooling air suction port of each vending machine. A collection pipe for collecting air into the cooling unit, an opening adjustment function for adjusting the opening to set the flow rate of the supply cool air or the collection cool air in advance, and a temperature control device arranged in the vending machine. A vending machine provided with at least one valve for supply cold air and at least one valve for recovered cold air having an opening / closing function for automatically controlling the flow of cold air. Cooling equipment. 8. A plurality of vending machines each having a cooling air outlet and a cooling air inlet, and a compressor, a condenser,
A refrigeration cycle having an expansion member and an evaporator, a regenerator for cooling the circulated brine, and a heat exchanger for introducing brine in the regenerator to exchange heat with air to cool each vending machine A cooling unit comprising a cool air generating chamber for generating cold air, and a supply pipe for supplying cooling air produced in the cool air generating chamber of the cooling unit from the cooling air outlet of each vending machine. A collection pipe for collecting the cooling unit in order to pass cooling air from a cooling air suction port of each vending machine to a heat exchanger in the cold air generation chamber; and a preset amount of supplied cool air or recovered cool air. Opening and closing function to automatically control the flow of cold air by a temperature control device installed in the vending machine. That the cooling device for the automatic vending machine, characterized by comprising at least one valve for at least one valve and collecting the cold air for supplying cold air. 9. The cooling device of a vending machine according to claim 8, wherein a regenerative member in which a brine that can be frozen is sealed in a closed container is fixedly arranged in the cooling tank.