JP2002081772A - Refrigerant circuit and vending machine using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make hot water, water and ice by a refrigerant circuit using carbon dioxide as a refrigerant. SOLUTION: For making hot water, water is heated by a hot water side heat exchanger 21 by sequentially circulating a refrigerant from a compressor 10 to a hot water side circulation passage selector switch 23, the heat exchanger 21 for hot water, an air side expansion valve 32 and a first air side circulation passage selector switch 33a. For making chilled water, chilled water is made by a heat exchanger 51 for chilled water by sequentially circulating the refrigerant from the compressor 10 to a second air side circulation passage selector switch 33b, a heat exchanger 31 for air, an air side expansion valve 32, a chilled water side expansion valve 52, the heat exchanger 51 for chilled water and a chilled water side circulation passage selector switch 53. For making ice, water is frozen by a heat exchanger 41 for ice making by sequentially circulating the refrigerant from the compressor 10 to the secondary air side circulation passage selector switch 33b, the heat exchanger 31 for air, the air side expansion valve 32, an ice making side expansion valve 42, the heat exchanger 41 for ice making and an ice making side circulation passage selector switch 43.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerant circuit capable of producing hot water, cold water and ice using refrigerant from one compressor, and a vending machine using the same.

[0002]

2. Description of the Related Art Today, vending machines for soft drinks and the like are widely used. Such vending machines include those that sell canned drinking water and those that cook according to customer orders and pour into a cup.

[0003] Such a vending machine that cooks and serves out according to a customer's order is provided so that tap water or the like is supplied from outside the machine, hot water is obtained by a water heater, and cold water and ice are obtained by a refrigeration circuit. Has become.

As a result, hot drinks such as coffee use hot water, and cold drinks such as juice or drinks containing ice use cold water or ice.

In general, a water heater is provided with an electric heater to heat tap water or the like to store hot water, and a refrigeration circuit includes a compressor,
A condenser, an evaporator, an expansion valve and the like are provided to make cold water or ice using a refrigerant such as R-22 as a working refrigerant.

[0006] Cold water and ice are produced by cooling or freezing tap water or the like with cold heat obtained by evaporating a refrigerant in an evaporator.

[0007]

However, R-2
It has been found that the refrigerant such as No. 2 contains chlorine and causes destruction of the ozone layer, and is subject to regulation, and a refrigerant instead of this is desired.

Further, since water is boiled by an electric heater and cold water and ice are obtained by operating a refrigeration circuit, it is difficult to increase the efficiency of the entire apparatus. There was a problem that was difficult to satisfy.

Accordingly, an object of the present invention is to provide a refrigerant circuit which is environmentally friendly using carbon dioxide, which is a natural refrigerant, and which can enhance energy efficiency, and a vending machine using the same.

[0010]

Means for Solving the Problems To solve the above problems, an invention according to claim 1 is a compressor for compressing a refrigerant, and a hot water heat exchanger for exchanging heat between the refrigerant and water for hot water supply to produce hot water. An exchanger, an air heat exchanger for exchanging heat between the refrigerant and the outside air, an ice making heat exchanger for exchanging heat with the refrigerant and ice making water to form ice, and a refrigerant and chilled water. A heat exchanger for cold water that makes cold water by heat exchange, a cold water side expansion valve connected to the heat exchanger for cold water, an ice making side expansion valve connected to the heat exchanger for ice making, and a heat exchanger for air When making hot water, the connected air-side expansion valve circulates high-temperature and high-pressure refrigerant from the compressor to supply it to the hot-water heat exchanger. When the ice is made, the refrigerant from the ice making side expansion valve is circulated so as to supply the refrigerant to the cold water heat exchanger. And a circulation path changer for circulating to supply to the vessel, at least water, characterized in that as cold water or ice can make the refrigerant from one compressor.

According to a second aspect of the present invention, the circulation path switch is connected between the hot water side circulation path switch connected to the hot water heat exchanger and the air heat exchanger and the low pressure side of the compressor. A first air-side circuit switch, a second air-side circuit switch connected between the air heat exchanger and the high pressure side of the compressor, a low pressure of the ice making heat exchanger and the compressor. When making only hot water, it has an ice making side circulation path switch connected between the water supply side and a cold water side circulation path switch connected between the cold water heat exchanger and the low pressure side of the compressor. A cycle of a hot water mode in which the refrigerant from the compressor is sequentially circulated to the hot water side circulation path switch, the heat exchanger for hot water, the air side expansion valve, and the first air side circulation path switch, and only the cold water is formed. When making the refrigerant from the compressor, the second air-side circulation path switching device, air heat exchanger, air-side expansion valve, chilled water-side expansion valve, chilled water Exchanger, forming a cycle of the chilled water mode to sequentially circulate through the chilled water side circuit switching device, when making only ice, the refrigerant from the compressor, the second air side circuit switching device, the air heat exchanger, An ice making mode cycle is formed in which an air-side expansion valve, an ice-making side expansion valve, an ice-making heat exchanger, and an ice-making side circulation path switch are sequentially circulated. Hot water side circuit switch,
Form a hot water / cold water mode cycle that sequentially circulates through the hot water heat exchanger, cold water expansion valve, cold water heat exchanger, and cold water circulation path switching device. The circulation path is formed so as to form a cycle in a hot water ice making mode in which the refrigerant is sequentially circulated through the hot water side circulation path switch, the hot water heat exchanger, the ice making expansion valve, the ice making heat exchanger, and the ice making side circulation path switch. It is characterized by switching.

According to a third aspect of the present invention, there is provided a heat exchanger for cold water or a heat exchanger for ice making in a hot water mode so that excess refrigerant is adjusted in operation of each mode so that an appropriate amount of refrigerant circulates in a cycle. , In the ice making mode, a heat exchanger for hot water or heat exchanger for cold water, in the cold water mode, a heat exchanger for ice making or hot water, in the hot water / cold water mode, a heat exchanger for air or ice making, a hot water ice making mode Is characterized in that the excess refrigerant is stored in a heat exchanger that does not operate in the operating mode among the air heat exchanger and the chilled water heat exchanger.

According to a fourth aspect of the present invention, there is provided an internal heat exchanger for exchanging heat between the refrigerant radiated by heat exchange in the hot water heat exchanger or the air heat exchanger and the refrigerant returning to the compressor. It is characterized by.

The invention according to claim 5 is characterized in that the refrigerant is a carbon dioxide refrigerant.

The invention according to claim 6 is the invention according to claims 1 to 6
The refrigerant circuit according to any one of the above, a product specifying means for specifying a plurality of products, and hot water, cold water, and ice supplied from the refrigerant circuit according to the product specified by the product specifying means, and the product is cooked. And cooking means.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of a vending machine provided with a refrigerant circuit according to the present invention.

Note that a carbon dioxide refrigerant, which is a natural refrigerant, is used as the refrigerant. In the following description, the carbon dioxide refrigerant is simply referred to as a refrigerant unless it is necessary to distinguish the refrigerant from other refrigerants.

The refrigerant circuit includes a compressor 10 for compressing the refrigerant,
Heat exchanger group 21 for exchanging heat with refrigerant and air or tap water,
31, 41, 51, expansion valve groups 32, 42, 52 provided with adjustable throttle amounts for expanding the refrigerant, and circulation path switching groups 23 (23 a, 23) for switching the circulation path of the refrigerant.
b), 33 (33a, 33b), 43, 53, etc.

The group of heat exchangers 21, 31, 41, 51 includes a heat exchanger 21 for hot water for exchanging heat between the refrigerant and water for storing hot water.
An air heat exchanger 31 for exchanging heat between the refrigerant and the outside air,
An ice making heat exchanger 41 for exchanging heat with ice making water and freezing it, and a cold water heat exchanger 51 for exchanging heat between a refrigerant and cold water.

The expansion valve groups 32, 42, and 52 include an air-side expansion valve 32 connected to the air heat exchanger 31, an ice-making expansion valve 42 connected to the ice making heat exchanger 41, and a chilled water heat exchanger. The cooling water side expansion valve 52 is connected to a cooling water side expansion valve 51.

The circulation path switch group 23 (23a, 23
b), 33 (33a, 33b), 43, and 53 are first switches for switching whether or not to circulate the refrigerant through the hot water heat exchanger 21.
And first and second air-side circulation path switches 33a and 33b for switching whether or not to circulate the refrigerant through the heat exchanger 31 for air, and the heat exchanger 41 for ice making. And a chilled water circulation path switch 53 for switching whether or not to circulate the refrigerant to the chilled water heat exchanger 51.

Hot water is obtained by circulating the water stored in the hot water storage tank 25 through the hot water heat exchanger 21 by the hot water storage pump 29, and heating the hot water with the heat of the refrigerant in the hot water heat exchanger 21. . At this time, the amount of water circulating in the hot water heat exchanger 21 is adjusted by the hot water flow control valve 24.

The hot water stored in the hot water storage tank 25 is supplied by opening and closing a hot water supply valve 26 provided in a hot water supply port 27.

It should be noted that hot water storage pump 29 is not always necessary. For example, the hot water heat exchanger 2
When the water is heated by 1, convection occurs. Utilizing such convection, the water in the hot water storage tank 25 is transferred to the hot water heat exchanger 2.
1 can be circulated.

The chilled water is obtained by supplying tap water or the like to the chilled water heat exchanger 51, where it is cooled by the heat of evaporation of the refrigerant, and is provided with a chilled water discharge valve 54 provided at the chilled water port 55.
Can be opened and closed to supply cold water.

The chilled water heat exchanger 51 is connected to a refrigerant pipe 51a.
And the cold water pipe 51b are immersed in a cold storage material (for example, water). Thereby, cold heat is stored in the cold storage material by the refrigerant circulating through the refrigerant pipe 51a, and the cold storage water circulating through the cold water pipe 51b is cooled by the cold storage material.

With such a configuration, for example, the refrigerant pipe 51
a and the cold water pipe 51b are broken, so that the refrigerant and the like do not mix into the cold water, and the safety is improved.

Further, since the cold heat is stored in the cold storage material, even when the cold water is used intermittently in a short time, it is not necessary to start and stop the refrigerant circuit each time. Since consumption can be prevented, and the time loss until the refrigerant pipe, the chilled water heat exchanger, and the like reach a predetermined temperature is reduced, quick supply of chilled water requests can be performed.

The ice is obtained by supplying water stored in a water storage tank 45 via an ice making side water supply valve 46 to an ice making heat exchanger 41, where it is cooled by the heat of evaporation of the refrigerant and frozen.

The ice making heat exchanger 41 is roughly constituted by a rotatable freezing portion 41b and a cooling portion 41a formed in a coil shape surrounding the freezing portion 41b. Circulates to cool the water in the frozen portion 41b.

Then, as the frozen portion 41b rotates, the ice formed in the frozen portion 41b rises, and the ice storage box 4
4 is brought into contact with a plate (not shown) provided in 4 and is broken into a predetermined size (length) to be stored in the ice storage box 44 as ice having a substantially uniform size. It has become so.

The hot water storage tank 25 and the water storage tank 45
The water supply is performed as follows, and these controls are controlled and managed by a control unit (not shown).

That is, the water storage tank 45 and the hot water storage tank 25
Is provided with a plurality of water level sensors such as water level sensors, and when the water level meter measures a predetermined low water level, the ice making side water supply valve 46 is provided.
Then, the hot water supply valve 28 is opened to supply tap water and the like to the water storage tank 45 and the hot water storage tank 25. When the water level meter measures a predetermined high water level, the ice making side water supply valve 46 and the hot water side water supply valve 28 are closed, and the water supply is stopped.

At this time, the water storage tank 45 or the hot water storage tank 25
If the water level is low, if a predetermined flow rate of tap water or the like is supplied for a predetermined time, there is an advantage that a water level meter for detecting a high water level becomes unnecessary.

With such a configuration, the operation modes of the refrigerant circuit include a hot water mode, a cold water mode, an ice making mode,
There are a hot water cooling water mode and a hot water ice making mode, and the mode is selected and operated according to the situation.

For example, when the remaining amount of hot water is small, the amount of ice is sufficient, and sufficient cold heat is stored in the cold storage material, the hot water mode is selected, and the remaining amount of ice is small and the amount of hot water or cold storage is selected. When the amount of heat stored in the material is sufficient, the ice making mode is selected. Further, when the heat storage material has a sufficient heat storage amount, but the amount of hot water and ice is small, the hot water ice making mode is selected.

The controller makes a selection in consideration of each remaining amount according to a preset control procedure. At this time,
For example, if it is assumed that cold drinks are more demanding than warm drinks in summer and warm drinks are expected to be more demanding than cold drinks in winter, the criteria for these seasons should be used. It may be used.

The operation of the hot water mode is started when water is newly stored in the hot water storage tank 25 or when the vending machine has been stopped for a while. In the case where the temperature of the hot water in the hot water storage 25 has dropped, the operation is performed when a predetermined amount of merchandise has been sold and the tap water supplied to the hot water storage tank 25 has lowered the temperature.

When the temperature of the water stored in the hot water storage tank 25 reaches a predetermined temperature (for example, 90 degrees), it is determined that the hot water has been stored, and the hot water mode is stopped.

The hot water mode is a mode for storing hot water.
Hot water side circuit switching device 23a, second hot water side circuit switching device 2
3b, by opening the first air-side circulation path switch 33a and closing all other circulation path switches, the refrigerant is compressed by the compressor 10,
The water is circulated sequentially through the hot water heat exchanger 21, the air-side expansion valve 32, the air heat exchanger 31, and the first air-side circulation path switching device 33a.

Thus, the refrigerant compressed by the compressor 10 exchanges heat with the water circulated by the hot water storage pump 29 in the hot water heat exchanger 21. Since the refrigerant is compressed by the compressor 10 and has a high temperature, the water receives heat from the refrigerant to become hot water and returns to the hot water storage tank 25.

On the other hand, the refrigerant loses heat and is supplied to the air-side expansion valve 32, where it expands and is supplied to the air heat exchanger 31. Outside air is blown to the air heat exchanger 31 by the air fan 34, and the air and the refrigerant exchange heat and return to the compressor 10.

Since such a circuit is a so-called heat pump circuit that pumps heat from the outside air when the refrigerant exchanges heat with the outside air, the circuit is more efficient than a conventional hot water storage using an electric heater. Further, as described above, since the carbon dioxide refrigerant, which is a natural refrigerant, is used as the refrigerant, high-temperature hot water can be obtained, and the configuration is environmentally friendly.

The chilled water mode is a mode for making chilled water.
By opening the air-side circulation path switch 33b and the chilled water-side circulation path switch 53 and closing all other circulation path switches, the refrigerant is compressed by the compressor 10, the air heat exchanger 31, and the air-side expansion valve 3.
2. Circulate sequentially through the cold water side expansion valve 52 and the cold water heat exchanger 51.

As a result, the refrigerant compressed by the compressor 10 exchanges heat with the outside air in the air heat exchanger 31 to radiate heat, and is sequentially supplied to the air-side expansion valve 32 and the chilled water-side expansion valve 52. It is expanded by at least one of these two expansion valves and supplied to the cold water heat exchanger 51 where it evaporates and returns to the compressor 10.

When the refrigerant passes through the two expansion valves, the heat exchange between the refrigerant and the heat exchanger on the evaporation side is reduced in order to reduce the heat loss. The expansion action takes place in an expansion valve connected to the vessel, the other expansion valves being merely passed. The same applies to the ice making mode and the like.

Then, the cold storage material is cooled by the heat of evaporation of the refrigerant in the cold water heat exchanger 51, and the water for the cold water is cooled by the heat of the cold storage material to become cold water. Cold water is taken out from the mouth 55.

The reason why cold water is not stored like hot water is that hygiene is considered. In the case of hot water, a sterilizing effect can be expected by heating the water. This is because such an effect cannot be expected.

In the ice making mode, the second air-side circulation path switch 33b and the ice-making side circulation path switch 43 are opened and all the other circulation path switches are closed, so that the refrigerant is compressed by the compressor 10, The air is circulated through the air heat exchanger 31, the air side expansion valve 32, the ice making side expansion valve 42, and the ice making heat exchanger 41 sequentially.

Thus, the refrigerant compressed by the compressor 10 exchanges heat with the outside air in the air heat exchanger 31 to radiate heat and is sequentially supplied to the air-side expansion valve 32 and the ice making-side expansion valve 42. It is expanded by at least one of these two expansion valves and supplied to the ice making heat exchanger 41, where it evaporates and returns to the compressor 10.

In the ice making heat exchanger 41, the water supplied to the freezing portion 41b is frozen according to the function described above,
Ice is stored at 4.

The hot / cold water mode is a mode in which hot water and cold water are produced at the same time, and the first hot water side circulation path switch 23a, the second hot water side circulation path switch 23b, and the cold water side circulation path switch 53 are opened to open the other. By closing all of the circulation path switches, the refrigerant is circulated sequentially through the compressor 10, the hot water heat exchanger 21, the cold water side expansion valve 52, and the cold water heat exchanger 51.

Thus, the refrigerant compressed by the compressor 10 exchanges heat with the water circulated by the hot water storage pump 29 in the hot water heat exchanger 21. Since the refrigerant is compressed by the compressor 10 and has a high temperature, the water from the hot water storage tank 25 receives heat from the refrigerant to become hot water and returns to the hot water storage tank 25 to be stored.

On the other hand, the refrigerant loses heat and is supplied to the chilled water side expansion valve 52, where it expands and is supplied to the chilled water heat exchanger 51. Since tap water or the like is supplied to the chilled water heat exchanger 51, the refrigerant and the water exchange heat, the water loses heat and is cooled, and the refrigerant receives heat and evaporates and returns to the compressor 10. .

The hot water ice making mode is a mode in which hot water and ice are produced at the same time. The first hot water side circulation path switch 23a, the second hot water side circulation path switch 23b, and the ice making side circulation path switch 43 are opened, and the other operation is performed. By closing all of the circulation path switches, the refrigerant is circulated sequentially to the compressor 10, the hot water heat exchanger 21, the ice making side expansion valve 42, and the ice making heat exchanger 41.

Thus, the refrigerant compressed by the compressor 10 exchanges heat with the water circulated by the hot water storage pump 29 in the hot water heat exchanger 21 to produce hot water, which is supplied to the ice making expansion valve 42. It expands here and is supplied to the ice making heat exchanger 41. Hot water returns to hot water storage tank 25 and is stored.

The refrigerant supplied to the ice making heat exchanger 41 is:
The water for ice making is frozen and returned to the compressor 10.

By the way, the amount of refrigerant required for operating each mode is different. For example, comparing the hot water mode with the ice making mode, the ice making mode may require a smaller amount of refrigerant.

In such a case, since the required amount of refrigerant differs depending on the mode, unless the amount of circulating refrigerant is adjusted,
The compressor 10 may cause liquid compression or the like, which may cause a decrease in compression efficiency or a failure.

Therefore, when each mode is selected, the control section stores the excess refrigerant in the non-operating heat exchanger so that only the amount of refrigerant necessary for the selected mode circulates through the circuit.

The heat exchangers that do not operate in each mode include the cold water heat exchanger 51 and the ice making heat exchanger 4 in the hot water mode.
1. The heat exchanger 21 for hot water and the heat exchanger 51 for cold water in the ice making mode, the heat exchanger 41 for ice making and the heat exchanger 21 for hot water in the cold water mode, the heat exchanger 31 for air and the heat for ice making in the hot water / cold water mode. The exchanger 41 is a heat exchanger 31 for air and a heat exchanger 51 for cold water in the hot water ice making mode.

In the following description, it is assumed that the chilled water mode is activated, and the surplus refrigerant is stored in the ice making heat exchanger 41. However, it is needless to say that other modes can be similarly considered.

At this time, when the chilled water mode is started, all the circulation path switching devices are fully opened for a predetermined time so that all the refrigerant circulates in the refrigerant circuit.

Thereafter, the second air-side circulation path switch 33b and the ice-making side circulation path switch 43 are fully opened so that the refrigerant circuit is in the ice making mode, and the other circulation path switches are fully closed. Further, the air-side expansion valve 32 and the ice making-side expansion valve 42 are fully opened.

Thus, the refrigerant from the compressor 10 is supplied to the air heat exchanger 31, the air-side expansion valve 32, and the ice-making-side expansion valve 4.
2. The ice making heat exchanger 41 is sequentially circulated.

At this time, the refrigerant exchanges heat with air in the air heat exchanger 31 to radiate heat, and is supplied to the air-side expansion valve 32 and the ice making-side expansion valve 42 in sequence. Therefore, it is supplied to the ice making heat exchanger 41 without expansion without expansion.

Therefore, the refrigerant gradually accumulates in the ice making heat exchanger 41 with time, and when a predetermined amount of the refrigerant (excess refrigerant) is stored in the ice making heat exchanger 41, the circulation on the ice making side is performed. The path switch 43 is fully closed, and the ice making side expansion valve 42 is completely squeezed to confine the surplus refrigerant to the ice making heat exchanger 41.

As a result, the refrigerant suitable for the chilled water mode operation circulates through the circuit, so that the chilled water circulation path switch 53 is fully opened to enter the chilled water mode operation.

The determination as to whether or not the surplus refrigerant is stored in the ice making heat exchanger 41 can be made by detecting the temperature and pressure of the ice making heat exchanger 41. The determination may be made based on the time after the storage in the exchanger 41 is started.

As a result, the excess refrigerant is supplied to the heat exchanger 4 for making ice.
1, only the required refrigerant is circulated through the circuit, and problems such as a decrease in efficiency and liquid compression can be prevented.

Next, a second embodiment of the present invention will be described with reference to the drawings. Note that the same components as those in the above embodiment are denoted by the same reference numerals, and description thereof will be appropriately omitted.

In the embodiment described above, for example, in the case of the hot water mode, the refrigerant from the compressor 10 is heat-exchanged with the water from the hot water storage tank 25 by the heat exchanger 21 for hot water, and the air-side expansion valve 32 and the air Through the heat exchanger 31 for the compressor 10
I was going to return to.

On the other hand, in this embodiment, as shown in FIG. 2, the internal heat exchanger 11 is provided on the low pressure side of the compressor 10 and heat is radiated by the hot water heat exchanger 21 and the air side heat exchanger 31. The refrigerant is used to heat the refrigerant returning to the compressor 10.

As a result, the temperature of the refrigerant returned from the internal heat exchanger 11 decreases, the amount of heat pumped by the heat exchanger on the heat absorption side supplied next increases, and the refrigerant returned to the compressor 10 by heat recovery. Is increased, and the cycle efficiency can be increased.

In FIG. 2, the air heat exchanger 3
A third air-side circulation path switching valve 33c is provided between the first air-side expansion valve 32 and the air-side expansion valve 32.

In any one of the hot water mode, the hot water ice making mode, and the hot water cooling water mode, the second hot water side circulation path switch 23b is opened (already opened when these modes are set). 3 Close the air-side circulation path switching valve 33c.

Thus, the refrigerant radiated by the hot water heat exchanger 21 sequentially circulates in the direction of the hot water heat exchanger 21, the second hot water side circulation path switch 23b and the internal heat exchanger 11, and The heat is supplied to the heat exchanger.

The heat exchangers on the heat absorbing side include a heat exchanger 31 for air in the hot water mode, a heat exchanger 41 for ice making in the hot water ice making mode, and a cold water exchanger in the hot water cooling water mode. It is a heat exchanger 51.

On the other hand, in the case of the ice making mode or the cold water mode,
The second hot-water-side circulation path switching device 23b is closed (already closed when these modes are set), and the third air-side circulation path switching valve 33c is opened.

Thus, the refrigerant radiated from the air heat exchanger 31 sequentially circulates in the direction of the air heat exchanger 31 and the internal heat exchanger 11, and is supplied to the heat exchanger on the heat absorbing side.

In this case, the heat exchanger on the heat absorbing side is the heat exchanger 41 for ice making in the ice making mode, and the heat exchanger 51 for cold water in the cold water mode.

In the above description, the case where the refrigerant radiated by the hot water heat exchanger 21 and the air side heat exchanger 31 is circulated to the internal heat exchanger 11 according to the mode has been described, but the present invention is not limited to this. Not a hot water heat exchanger 2
It goes without saying that only one of the refrigerant from No. 1 and the refrigerant from the air-side heat exchanger 31 may be circulated to the internal heat exchanger 11.

Next, a third embodiment of the present invention will be described with reference to the drawings. Note that the same components as those in the above embodiment are denoted by the same reference numerals, and description thereof will be appropriately omitted.

Such a vending machine receives a supply of hot water, cold water, and ice from a refrigerant circuit in accordance with a product designated by the commodity designating mechanism (not shown) for designating a plurality of products. This can be achieved by providing a cooking mechanism or the like for cooking the product, and a known product specifying mechanism or cooking mechanism can be used.

As a result, hot water, cold water, and ice products can be provided with only one refrigerant circuit, and a vending machine with high energy efficiency and low equipment cost can be provided.

[0086]

As described above, according to the present invention,
Since at least hot water, cold water, or ice can be produced by the refrigerant from one compressor, energy efficiency can be improved and running costs and initial introduction costs can be reduced.

Further, since an internal heat exchanger is provided to exchange heat between the refrigerant from the hot water heat exchanger and the air heat exchanger and the refrigerant returning to the compressor, the cycle efficiency can be improved. become.

Further, since carbon dioxide is used as the refrigerant, it is possible to avoid problems such as global warming and destruction of the ozone layer due to the refrigerant.

Further, since the vending machine is constituted by using such a refrigerant circuit, the cost including the running cost of the vending machine can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a schematic configuration of a refrigerant circuit applied to the description of a first embodiment of the present invention and a vending machine using the same.

FIG. 2 is a diagram showing a schematic configuration of a refrigerant circuit applied to the description of a second embodiment of the present invention and a vending machine using the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Compressor 11 Internal heat exchanger 21 Heat exchanger for hot water 23a 1st hot water side circulation path switch 23b 2nd hot water side circulation path switch 25 Hot water storage tank 31 Air heat exchanger 32 Air side expansion valve 33a 1st air Side circulation path switch 33b Second air side circulation path switch 33c Third air side circulation path switch 41 Heat exchanger for ice making 42 Ice making expansion valve 43 Ice making side circulation path switch 44 Ice storage box 45 Water storage tank 51 For cold water Heat exchanger 52 Chilled water side expansion valve 53 Chilled water side circuit switch

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F25D 11/00 101 F25D 11/00 101J G07F 9/10 101 G07F 9/10 101A 102 102A 13/06 13 / 06 Z 13/10 13/10 Z (72) Inventor Hirokazu Izaki 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Takayasu Saito Keihanhondori, Moriguchi-shi, Osaka 2-5-5 Sanyo Electric Co., Ltd. F term (reference) 3E044 AA01 DB16 FB11 3E047 BA01 BA02 BA03 FA01 FA04 FA07 3L045 AA03 BA01 CA01 CA04 DA02 GA08 HA03 HA07 JA02 JA12 JA14 KA07 KA16 LA12 PA05

Claims (6)

[Claims] 1. A compressor for compressing a refrigerant, a heat exchanger for hot water for producing hot water by exchanging heat between the refrigerant and water for hot water supply, and a heat exchanger for air for exchanging heat between the refrigerant and outside air. An ice making heat exchanger for making ice by exchanging heat with a refrigerant and ice making water; a cold water heat exchanger making heat exchange between a refrigerant and cold water to produce cold water; and the cold water heat exchanging. A cold-water-side expansion valve connected to the vessel, an ice-making-side expansion valve connected to the ice-making heat exchanger, an air-side expansion valve connected to the air heat exchanger, The high-temperature and high-pressure refrigerant from the compressor is circulated so as to be supplied to the hot water heat exchanger. When producing cold water, the refrigerant from the cold water side expansion valve is supplied to the cold water heat exchanger. When making ice, the refrigerant from the ice making side expansion valve is supplied to the ice making side heat exchanger. And a circulation path changer to the ring at least water, a refrigerant circuit, characterized in that as cold water or ice can make the refrigerant from one compressor. 2. The circulation path switching device, wherein the circulation path switching device is connected to the hot water heat exchanger, and is connected between the air heat exchanger and the low pressure side of the compressor. A first air-side circulation path switch, a second air-side circulation path switch connected between the air heat exchanger and the high-pressure side of the compressor, the ice making heat exchanger, and the compressor An ice making-side circulation path switch connected between the low-pressure side of the compressor and a chilled water-side circulation path switch connected between the chilled water heat exchanger and the low-pressure side of the compressor. When only hot water is produced, the refrigerant from the compressor is supplied to the hot water side circulation path switch, the hot water heat exchanger, the air side expansion valve, the first
Forming a cycle in a hot water mode in which the refrigerant is sequentially circulated to the air-side circulation path switcher, and when producing only cold water, the refrigerant from the compressor is supplied to the second air-side circulation path switcher, an air heat exchanger, and air. Forming a cold water mode cycle in which the refrigerant is circulated sequentially through the side expansion valve, the chilled water expansion valve, the chilled water heat exchanger, and the chilled water circulation path switch. 2
Air-side circuit switch, air heat exchanger, air-side expansion valve,
An ice making mode cycle is formed in which an ice making side expansion valve, an ice making heat exchanger, and an ice making side circulation path switching device are sequentially circulated, and when hot water and cold water are simultaneously produced, the refrigerant is circulated from the compressor to the hot water side. When a hot water / cold water mode cycle is formed, in which the hot water and ice are simultaneously formed by sequentially circulating the heat exchanger, hot water heat exchanger, cold water expansion valve, cold water heat exchanger, and cold water circulation circuit switch. Forming a cycle of a hot water ice making mode in which the refrigerant from the compressor is sequentially circulated through the hot water side circulation path switch, the hot water heat exchanger, the ice making expansion valve, the ice making heat exchanger, and the ice making side circulation path switch. 2. The refrigerant circuit according to claim 1, wherein the circulation path is switched so as to perform the operation. 3. A heat exchanger for cold water or a heat exchanger for ice making in the hot water mode, and a hot water in the ice making mode so that an appropriate amount of the refrigerant circulates through the cycle by adjusting the excess refrigerant when operating each of the modes. Heat exchanger or heat exchanger for cold water, heat exchanger for ice making or heat exchanger for hot water in cold water mode, heat exchanger for air or heat exchanger for ice making in hot or cold water mode, heat exchange for air in hot water ice making mode 3. The refrigerant circuit according to claim 2, wherein the excess refrigerant is stored in a heat exchanger that does not operate in the operating mode among the heat exchangers for cold water. 4. An internal heat exchanger for exchanging heat between a refrigerant radiated by exchanging heat with the hot water heat exchanger or the air heat exchanger and a refrigerant returning to the compressor. The refrigerant circuit according to any one of claims 1 to 3, wherein: 5. The refrigerant circuit according to claim 1, wherein the refrigerant is a carbon dioxide refrigerant. 6. A refrigerant circuit according to any one of claims 1 to 5, product specifying means for specifying a plurality of products, and hot water or cold water from the refrigerant circuit according to the product specified by the product specifying means. And a cooking means for receiving the supply of ice and cooking the product.