JP2001118134A - Vending machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a vending machine from explosion, a fire, etc., due to a coolant. SOLUTION: A compressor 103, a condenser 104, a decompressor 105 and an evaporator 106 constituting the first coolant circulation circuit are arranged inside of a machine chamber, and only the first heat exchange 110 constituting the second coolant circulation circuit is arranged inside of a housing chamber 101. The second heat exchange 109 exchanges heat with the evaporator 106 to cool brine, and the first heat exchanger 110 exchanges heat with the brine to cool the chamber 101. By arranging the whole constitution of the first coolant circulation circuit is arranged in the chamber 102 like this, a coolant A never passes through the chamber 101 of high air-tightness and the chamber 101 is indirectly cooled through the use of the coolant A. Consequently, even in the case of using a coolant of high hazardous factors such as explosivity, toxicity as the coolant for executing a freezing cycle, a vending machine is protected from an accident such as explosion, a fire.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vending machine for cooling products for sale, and more particularly to a vending machine suitable for preventing explosion, fire and the like caused by a refrigerant.

[0002]

2. Description of the Related Art A conventional vending machine will be described with reference to FIG.

FIG. 2 is a front view showing a state in which a front door and an inner door of a conventional vending machine are opened.

[0004] In FIG. 2, the inside of the vending machine 100 includes:
A storage room 101 for storing sales products (canned beverages, bottled drinks, packed beverages, confectionery, etc.) and a machine room 102 in which a cooling device for cooling the storage room 101 and thereby cooling the sales products are arranged. Separated. The cooling device includes a closed circuit of a compressor 103, a condenser 104, a decompressor (capillary tube, expansion valve, etc.) 105, and an evaporator 106. That is, the refrigerant in the cooling device is discharged as high-temperature and high-pressure vapor in the compressor 103, and is condensed and liquefied by discharging the heat energy of the refrigerant itself to the outside air in the condenser 104. At 105, the liquefied refrigerant that undergoes throttling resistance so as to reach a predetermined evaporation temperature and is decompressed, and then rapidly expands near the inlet of the evaporator 106
At 06, it takes away the surrounding heat and evaporates. Then, the storage room 101 of the vending machine 100 is cooled by the vaporization heat of the evaporator 106 at this time.

[0005] In the storage room 101, a sales product storage unit 107 for storing a plurality of types of sales products in a distinguished state is installed, and in the remaining space of the storage room 101, an evaporator 106 constituting a cooling device is installed. Is done. In the machine room 102, a compressor 103, a condenser 104,
And a decompressor 105. The compressor 103, the condenser 104, the decompressor 105, and the evaporator 106, which constitute the cooling device, are connected to form a closed circuit by using a pipe 108. It is arranged so as to penetrate the upper surface of the machine room 102. Here, the storage room 101 is required to have high air-tightness because it is necessary to enhance the cooling efficiency of the sold product. Therefore, a cutout or the like of the storage chamber 101 through which the pipe 108 passes is filled with putty or the like, and a gap between the cutout of the storage chamber 101 and the pipe 108 is filled to improve airtightness.

If necessary, a fan for increasing the heat exchange rate of heat radiation may be installed near the condenser 104, and the heat exchange rate of heat absorption may be increased near the evaporator 106. A fan for improving the cooling air circulation efficiency inside the storage room 101 may be provided.

[0007] Incidentally, the above-mentioned conventional technical background includes, for example,
It is disclosed in JP-A-5-45011, JP-A-8-5165, JP-A-11-224371 and the like.

[0008]

The refrigerant used in the cooling device is appropriately selected from many types of refrigerants according to various conditions such as the type of compressor, evaporation temperature and pressure, condensation temperature and pressure, and the like. Is done.

The interior of the storage room 101 is deteriorated due to aging or damaged due to some external factors. The evaporator 106 inside the storage chamber 101 is also a target of the above-described deterioration or damage. If the evaporator 106 is damaged, the inside of the storage chamber 101 will be filled with the refrigerant gas in a high or low temperature state. In particular, due to vending machine usage conditions, toxicity,
When a refrigerant having a high danger such as explosiveness (for example, a refrigerant containing ammonia, a hydrocarbon-based alternative fluorocarbon refrigerant, or the like) is used, the airtightness of the storage room 101 causes an explosion, a fire, and an adverse effect on a human body. Etc. could cause serious accidents.

Accordingly, the present invention provides a vending machine which can solve the above problem by arranging the entire configuration of a cooling device for executing a series of refrigeration cycles (compression, condensation, decompression, expansion, evaporation) outside a storage room. The purpose is to provide.

[0011]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and the vending machine according to the first aspect of the present invention has a storage room for storing sales commodities and the storage room. A vending machine having a cooling device that cools the product for sale by cooling the interior of the room, wherein a first refrigerant circulation circuit is formed outside the storage room and the first refrigerant circulation circuit is formed. A second refrigerant circuit for indirectly cooling the inside of the storage chamber by utilizing the same is formed. According to claim 1, a series of refrigeration cycles (compression,
This has the effect of preventing inconvenience of filling the storage chamber with the refrigerant for performing condensation, decompression, expansion, and evaporation).

A vending machine according to a second aspect is dependent on the first aspect, wherein the first refrigerant circulation circuit is a closed circuit including at least a compressor, a condenser, and an evaporator. The refrigerant used in the refrigerant circuit of the present invention is characterized by containing a substance such as explosiveness and toxicity. According to the second aspect, it is possible to prevent the accident that the storage chamber explodes or causes a fire based on the danger of the refrigerant substance in the first refrigerant circuit.

According to a third aspect of the present invention, there is provided a vending machine according to the second aspect, wherein the second refrigerant circuit is based on heat of vaporization of an evaporator constituting the first refrigerant circuit. A first heat exchanger for cooling the storage chamber;
Wherein the heat exchanger is disposed inside the storage chamber. According to the third aspect, the storage chamber has an effect of being reliably cooled by the first heat exchanger.

According to a fourth aspect of the present invention, there is provided a vending machine according to the third aspect, wherein the second refrigerant circulation circuit exchanges heat with an evaporator in the first refrigerant circulation circuit. And a first heat exchanger that exchanges heat with the circulating refrigerant cooled by the second heat exchanger. According to the fourth aspect, there is an effect that the second refrigerant circulation circuit can be easily configured by using two heat exchangers.

According to a fifth aspect of the present invention, there is provided a vending machine according to the fourth aspect, wherein an evaporator forming the first refrigerant circuit and a second heat exchange forming the second refrigerant circuit. It is characterized by being integral with the vessel. According to claim 5,
There is an operational effect that the heat exchange efficiency of the second heat exchanger can be improved.

According to a sixth aspect of the present invention, there is provided a vending machine according to the second aspect, wherein the refrigerant used in the second refrigerant circuit is brine. According to the sixth aspect, the refrigerant circulating in the storage room has no danger factor, and an effect of preventing an accident in the storage room itself is exhibited.

According to a seventh aspect of the present invention, there is provided the vending machine according to the fourth aspect, further comprising a machine room outside the storage room, wherein the first refrigerant circulation circuit and the second refrigerant circuit are provided inside the machine room. And the second heat exchanger in the refrigerant circuit. According to the seventh aspect, the machine room has a ventilation port for executing a refrigeration cycle, and has an effect of preventing the inside of the vending machine from being filled with the refrigerant of the first refrigerant circulation circuit.

An eighth aspect of the present invention is directed to the vending machine according to the seventh aspect, wherein the refrigerant in the second refrigerant circuit circulates through a pipe, and the pipe is connected to the storage room and the machine room. It is characterized in that it is arranged straddling. According to the eighth aspect, the gap between the storage room and the pipe can be eliminated by padding or the like, and a storage room with high airtightness can be provided.

A ninth aspect of the present invention is directed to the vending machine according to the eighth aspect, wherein the pipe is formed of a resin. According to the ninth aspect, the degree of freedom in designing the piping is increased, and the operation and effect can be sufficiently applied to a small-sized vending machine having a narrow machine room.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be specifically described with reference to the drawings.

FIG. 1 is a front view showing a state in which a front door and an inner door of a vending machine according to the present invention are opened. In the description of FIG. 1, the same components as those in FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 1, the compressor 103 and the condenser 10
4, decompressor (capillary tube, expansion valve, etc.) 10
5, and the evaporator 106 are combined with the pipe 108 to form a closed circuit for performing a series of refrigeration cycles (compression, condensation, decompression, expansion, and evaporation). The closed circuit corresponds to a first refrigerant circuit, and the entire configuration is disposed inside the machine room 102. The front door of the vending machine 100 is provided with a vent formed by a plurality of slit rows and the like.
An opening is provided on the back surface of the vending machine 02. Therefore, even when the vending machine 100 is in an operation state in which the front door and the inner door are closed, the machine room 102 has sufficient air permeability to execute a series of refrigeration cycles. Is secured. For example, the interior of the machine room 102 may be deteriorated due to aging or may be damaged due to external factors, and accordingly, the first refrigerant circuit may be damaged, and the refrigerant A may be discharged from the first refrigerant circuit. If the (vaporizing refrigerant or liquefied refrigerant) leaks, even if the refrigerant contains hazardous factors such as toxicity and explosiveness, the machine room 102 has a sufficient air permeability, so that explosion, fire, etc. It doesn't matter.

The second heat exchanger 109 exchanges heat with the evaporator 106 to form a refrigerant B passing through the inside of the second heat exchanger 109.
, That is, it functions as a radiator. The second heat exchanger 109 is designed to improve heat exchange efficiency integrally with the evaporator 106, and is formed using, for example, a material having a high thermal conductivity. Evaporator 1
06 and the second heat exchanger 109 are covered with a heat insulating material 113 such as glass wool in order to reduce heat exchange loss. The first heat exchanger 110 exchanges heat with the refrigerant B to cool the inside of the storage chamber 101, that is, functions as a heat absorber. The pump 111 is for forcibly circulating the refrigerant B, and is disposed at one of the inlet and the outlet of the second heat exchanger 109. In the embodiment of the present invention, for example, the pump 111 is arranged on the inlet side of the second heat exchanger 109. The first and second heat exchangers 110 and 109 and the pump 111 are connected by a pipe 112 through which the refrigerant B circulates, forming a closed circuit. The closed circuit corresponds to a second refrigerant circulation circuit, in which the first heat exchanger 110 is disposed in the remaining space of the storage chamber 101, and the second heat exchanger 109 and the pump 1
11 is disposed in the machine room 102, and the pipe 112 is disposed so as to penetrate (straddle) the lower surface of the storage room 101 and the upper surface of the machine room 102. In addition, the airtightness of the storage room 101 can be improved by closing the gap between the lower surface of the storage room 101 and the pipe 112 with padding or the like. In addition, as the refrigerant B passing through the pipe 112, non-dangerous brine is used. Furthermore,
The second refrigerant circuit does not require pressurization, and the inside of the pipe 112 may be at the same atmospheric pressure. Therefore, for example, if a resin tube is used as the pipe 112, the degree of freedom of the arrangement 112 is increased, and it is possible to easily cope with a vending machine having a small machine room.

As described above, when the first refrigerant circulation circuit executes the refrigeration cycle and the evaporator 106 is cooled, the second heat exchanger 109 exchanges heat with the evaporator 106 to cool the refrigerant B. The first heat exchanger 110 exchanges heat with the cooling refrigerant B circulating at the pressure of the pump 111, and cools the air in the storage room 101 to cool the sales merchandise storage 107.

As described above, in the embodiment of the present invention, the entire configuration of the first refrigerant circuit for executing the refrigeration cycle is arranged in the machine room 102, and the refrigerant A is stored in the storage chamber 101 with high airtightness.
In this configuration, the refrigerant B passing through the storage chamber 101 is used as brine, and the storage chamber 101 is indirectly cooled using the refrigerant A.

Therefore, it is possible to reliably prevent the conventional inconvenience that the storage chamber 101 is filled with the highly dangerous refrigerant A.

If necessary, a fan for increasing the heat exchange rate of heat radiation may be installed near the condenser 104, and a fan for increasing the heat exchange rate of heat absorption near the evaporator 106. May be installed, and the first heat exchanger 1
A fan for improving the circulation efficiency of the cooling air inside the storage room 101 may be installed near the storage room 101.

[0028]

The effects of the present invention are as follows.

The vending machine according to claim 1 is a vending machine having a storage room for storing sales products, and a cooling device for cooling the sales products by cooling the inside of the storage room. Forming a first refrigerant circuit outside the storage chamber, and forming a second refrigerant circuit that indirectly cools the inside of the storage chamber using the first refrigerant circuit. Because of the feature, it is possible to prevent the inconvenience of filling the storage chamber with the refrigerant for performing a series of refrigeration cycles (compression, condensation, decompression, expansion, and evaporation).

In the vending machine according to the second aspect, the first refrigerant circuit includes at least a compressor, a condenser,
It is a closed circuit composed of an evaporator, and the refrigerant used in the first refrigerant circuit is characterized by containing a substance such as explosive and toxic. Therefore, the storage chamber is provided in the first refrigerant circuit. An effect of preventing an accident such as an explosion or a fire based on the danger of the refrigerant substance can be prevented.

Further, in the vending machine according to the third aspect, the second refrigerant circulation circuit cools the storage chamber based on cooling air of an evaporator constituting the first refrigerant circulation circuit. The first heat exchanger is provided, and the first heat exchanger is installed inside the storage chamber, so that the storage chamber is effectively cooled by the first heat exchanger. Play.

Further, in the vending machine according to the fourth aspect, the second refrigerant circuit includes a second heat exchanger that exchanges heat with an evaporator in the first refrigerant circuit, and
And the first heat exchanger that performs heat exchange with the circulating refrigerant cooled by the heat exchanger of the second aspect.
This has the effect that the refrigerant circulation circuit can be easily configured using two heat exchangers.

Further, in the vending machine according to the fifth aspect, the evaporator forming the first refrigerant circuit and the second heat exchanger forming the second refrigerant circuit are integrated. Therefore, there is an effect that the heat exchange efficiency of the second heat exchanger can be improved.

In the vending machine according to the present invention, since the refrigerant used in the second refrigerant circuit is brine, the refrigerant circulating in the storage room has a risk factor. Therefore, an effect of preventing an accident in the storage room itself can be achieved.

Further, in the vending machine according to claim 7, a machine room is provided outside the storage room, and the first and second refrigerant circulation circuits in the first and second refrigerant circulation circuits are provided inside the machine room. The machine room has a vent for executing a refrigeration cycle, and the inside of the vending machine is filled with the refrigerant of the first refrigerant circulation circuit. The effect which can prevent is produced.

In the vending machine according to the present invention, the refrigerant in the second refrigerant circuit may circulate through a pipe, and the pipe may be disposed across the storage room and the machine room. Since it is a feature, the gap between the storage room and the pipe can be eliminated by filling with putty or the like, and an effect of providing a highly airtight storage room can be obtained. Furthermore, in the vending machine according to the ninth aspect, since the pipe is formed of resin, the degree of freedom in designing the pipe is increased, and the vending machine can sufficiently cope with a small-sized vending machine with a narrow machine room. It has the following effects.

[Brief description of the drawings]

FIG. 1 is a front view showing a state where a front door and an inner door of a vending machine of the present invention are opened.

FIG. 2 is a front view showing a state in which a front door and an inner door of a conventional vending machine are opened.

[Explanation of symbols]

 Reference Signs List 100 Vending machine 1 Storage room 2 Machine room 3 Compressor 4 Condenser 5 Decompressor 6 Evaporator 7 Sales merchandise storage unit 108, 112 Piping 109 Second heat exchanger 1 First heat exchanger 2 Pump

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F25D 19/00 520 F25D 19/00 520Z

Claims (9)

[Claims] 1. A vending machine having a storage room for storing sales products, and a cooling device for cooling the sales products by cooling the inside of the storage room, wherein a first device is provided outside the storage room. A vending machine which forms the refrigerant circulation circuit of (1) and forms a second refrigerant circulation circuit that indirectly cools the inside of the storage chamber using the first refrigerant circulation circuit. 2. The first refrigerant circulation circuit is a closed circuit including at least a compressor, a condenser, and an evaporator, and the refrigerant used in the first refrigerant circulation circuit has explosiveness, toxicity, and the like. 2. The vending machine according to claim 1, wherein the vending machine contains a substance. 3. The second refrigerant circuit includes a first heat exchanger for cooling the storage chamber based on heat of vaporization of an evaporator constituting the first refrigerant circuit, The first
3. The vending machine according to claim 2, wherein said heat exchanger is installed inside said storage room. 4. The second refrigerant circuit includes a second heat exchanger that exchanges heat with an evaporator in the first refrigerant circuit, and a circulating refrigerant cooled by the second heat exchanger. 4. The vending machine according to claim 3, comprising: a first heat exchanger for performing heat exchange with the first heat exchanger. 5. The automatic apparatus according to claim 4, wherein an evaporator forming the first refrigerant circuit and a second heat exchanger forming the second refrigerant circuit are integrated. Vending machine. 6. The vending machine according to claim 2, wherein the refrigerant used in the second refrigerant circuit is brine. 7. A machine room is provided outside the storage chamber, and the first refrigerant circulation circuit and the second heat exchanger in the second refrigerant circulation circuit are provided inside the machine room. The vending machine according to claim 4, characterized in that: 8. The automatic vending machine according to claim 7, wherein the refrigerant in the second refrigerant circuit circulates through a pipe, and the pipe is disposed across the storage room and the machine room. Machine. 9. The vending machine according to claim 8, wherein the pipe is formed of a resin.