CN220377414U - Refrigerating device for air water generator - Google Patents

Abstract

The utility model relates to a refrigerating device for an air water machine, which comprises a compressor, a condenser, a capillary tube, a bypass electromagnetic valve and a refrigerating tube; the high-pressure output end of the compressor is connected with the input end of the condenser through a pipeline, the output end of the condenser is connected with the input end of the capillary tube, the output end of the capillary tube is connected with the input end of the bypass electromagnetic valve, the output end of the bypass electromagnetic valve is connected with the input end of the refrigerating pipe through a pipeline, and the output end of the refrigerating pipe is connected with the low-pressure input end of the compressor through a pipeline; the refrigerating pipe is positioned in the cold water tank; when the bypass electromagnetic valve is in an open state, the refrigerant sequentially circulates through the compressor, the condenser, the capillary tube, the bypass electromagnetic valve and the refrigeration tube through the pipeline, so that the flow route of the refrigerant is reduced, the refrigeration cycle of the refrigeration device is shortened, and the refrigeration speed of the refrigeration device is improved.

Description

Refrigerating device for air water generator

Technical Field

The utility model relates to the technical field of refrigeration, in particular to a refrigeration device for an air water generator.

Background

The air water making machine uses air in various environments as raw material, and uses several technological means of air purification, air heating, air condensation and water quality purification to liquefy air so as to obtain the high-tech product of drinking water meeting sanitary standard. Air-to-water machines generally have a condensing and evaporating device, which often includes a compressor, a condenser, an evaporator, a fan, a connecting pipe, a filtering device, etc., wherein a cold water tank is provided at one side of the evaporator, and an evaporating pipe in the evaporator extends outwards and is fitted around the outer side wall of the cold water tank. The water making principle of the air water making machine is as follows: air with certain humidity in the surrounding environment flows through the evaporator under the action of the fan, water vapor in the air is condensed into dew on the heat exchange surface of the evaporator, the dew is accumulated and flows down along the vertical direction under the action of gravity, and then the dew is stored in the water storage tank, and if people need to drink water, water in the water storage tank flows through the filtering device under the action of the water pump, is filtered into potable water and flows to the water outlet.

The cold water is produced by the air water production machine in the prior art generally in the following ways:

1. the semiconductor refrigerating sheet is directly arranged on the cold water tank, and the water in the cold water tank is refrigerated through the Peltier effect of the semiconductor refrigerating sheet to form cold water;

2. the refrigerant circularly flows among the compressor, the condenser, the capillary tube, the evaporator and the evaporating tube outside the cold water tank to finish refrigeration. The low-temperature low-pressure refrigerant gas is compressed into high-temperature high-pressure refrigerant gas by the compressor and then is sent to the condenser, the condenser enables the refrigerant to be changed into high-temperature high-pressure refrigerant liquid through heat exchange, the refrigerant liquid is changed into low-temperature low-pressure refrigerant liquid after passing through the capillary tube, the refrigerant liquid enters the evaporating pipe in the evaporator and the evaporating pipe surrounding the outside of the cold water tank, the low-temperature low-pressure refrigerant liquid absorbs heat in the evaporating pipe, then is gasified into low-temperature low-pressure refrigerant gas and then is sent to the compressor, wherein the surface temperature of the evaporating pipe of the evaporator is low, the cold energy formed by the evaporating pipe is transferred to water in the tank through the cold water tank, and therefore the water in the cold water tank forms cold water.

When the first mode is used for refrigeration, the production cost is high, and the electricity consumption is high; when the second mode is used for refrigeration, the refrigerant needs to circulate through the compressor, the condenser, the capillary tube, the evaporator and the evaporation tube outside the cold water tank, the flow path of the refrigerant is long, the refrigeration cycle is long, and the cold energy is transmitted to the water in the tank through the cold water tank, so that the refrigeration conduction effect is poor, and the refrigeration speed is low.

Disclosure of Invention

In view of the above, the present utility model provides a refrigeration device for an air water machine, which is used for solving the problems of longer refrigeration cycle and slower refrigeration speed in the prior art.

To achieve one or a part or all of the above or other objects, the present utility model provides a refrigeration device for an air-to-water machine, comprising a compressor, a condenser, a capillary tube, a bypass solenoid valve and a refrigeration tube;

the high-pressure output end of the compressor is connected with the input end of the condenser through a pipeline, the output end of the condenser is connected with the input end of the capillary tube, the output end of the capillary tube is connected with the input end of the bypass electromagnetic valve, the output end of the bypass electromagnetic valve is connected with the input end of the refrigerating pipe through a pipeline, and the output end of the refrigerating pipe is connected with the low-pressure input end of the compressor through a pipeline;

the refrigerating pipe is positioned in the cold water tank;

wherein the refrigerant sequentially circulates through the compressor, the condenser, the capillary tube, the bypass electromagnetic valve and the refrigeration pipe through the pipeline.

Further, the bypass electromagnetic valve is provided with a first input end, a first output end and a second output end;

the output end of the capillary tube is connected with the first input end, and the first output end is connected with the input end of the refrigeration tube through a pipeline;

the second output end is used for being communicated with the input end of the evaporator.

Further, two bypass solenoid valves are arranged, each bypass solenoid valve is provided with one capillary tube in a matching mode, and the condenser is provided with two condensation output ends;

the condensing output end of the upper part of the condenser is connected with the first input end of one bypass electromagnetic valve through a capillary tube, and the condensing output end of the lower part of the condenser is connected with the first input end of the other bypass electromagnetic valve through a capillary tube.

Further, the refrigeration device also comprises a first Y-shaped interface, which comprises an input end and two output ends;

each condensation output end of the condenser is correspondingly provided with a condensation input end;

two output ends of the first Y-shaped interface are positioned on the same side, one output end of the first Y-shaped interface is connected with a condensation input end at the upper part of the condenser through a pipeline, and the other output end of the first Y-shaped interface is connected with a condensation input end at the lower part of the condenser through a pipeline;

the input end of the first Y-shaped interface is connected with the high-pressure output end of the compressor through a pipeline.

Further, the refrigeration device also comprises a second Y-shaped interface, which comprises two input ends and an output end;

the two input ends of the second Y-shaped interface are positioned on the same side, and the output end of the second Y-shaped interface is connected with the input end of the refrigeration tube through a pipeline;

the first output ends of the two bypass electromagnetic valves are respectively connected with one input end of the second Y-shaped interface through pipelines.

Further, the refrigeration pipe is hung in the cold water tank.

Further, the refrigeration pipe is spiral.

Further, the refrigerant is R22 or R134a or R290.

Further, the outer side wall of the cold water tank is wrapped with an insulation layer.

The implementation of the embodiment of the utility model has the following beneficial effects:

the bypass electromagnetic valve is added, when the air water machine needs to refrigerate water, the refrigerating device is started, and the bypass electromagnetic valve is in an open state, so that the refrigerant only needs to circulate through the compressor, the condenser, the capillary tube, the bypass electromagnetic valve and the refrigerating pipe, the flowing route of the refrigerant is reduced, the refrigerating cycle of the refrigerating device is further shortened, and the refrigerating speed is improved; and the refrigerating pipe is positioned in the cold water tank, and the refrigerating pipe is directly contacted with water in the cold water tank to refrigerate, so that the refrigerating conduction effect can be improved, and the refrigerating speed can be further improved.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Wherein:

FIG. 1 is a front view of a refrigeration unit of the present application;

fig. 2 is an enlarged schematic view of reference symbol a in fig. 1;

FIG. 3 is a schematic vertical sectional view of a cold water tank;

fig. 4 is a schematic view of the internal structure of the air-to-water machine in the present application.

Reference numerals: 1. a compressor; 11. a high voltage output terminal; 12. a low voltage input; 2. a condenser; 3. a capillary tube; 4. a bypass solenoid valve; 41. a first input; 42. a first output terminal; 43. a second output terminal; 5. a refrigeration tube; 6. a cold water tank; 61. a heat preservation layer; 62. a temperature sensing probe; 63. a high-level water inlet pipe; 64. a low-level water outlet pipe; 7. a first Y-interface; 8. a second Y-shaped interface; 9. a pipe;

100. an evaporator; 101. a housing; 102. an exhaust fan; 103. a water tank; 104. a water pump; 105. a filter; 106. and a water outlet.

Detailed Description

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs; the terminology used in the description of the applications herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model; the terms "comprising" and "having" and any variations thereof in the description of the utility model and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In order to make the person skilled in the art better understand the solution of the present utility model, the technical solution of the embodiment of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

As an example, referring to fig. 1 to 4, a refrigerating apparatus for an air-to-water machine includes a compressor 1, a condenser 2, a capillary tube 3, a bypass solenoid valve 4, and a refrigerating pipe 5; the model of the compressor is PBJ16HA, and the refrigerating pipe 5 is a stainless steel pipe.

The high-pressure output end 11 of the compressor 1 is connected with the input end of the condenser 2 through a pipeline 9, the output end of the condenser 2 is connected with the input end of the capillary tube 3, the output end of the capillary tube 3 is connected with the input end of the bypass electromagnetic valve 4, the output end of the bypass electromagnetic valve 4 is connected with the input end of the refrigerating pipe 5 through a pipeline 9, and the output end of the refrigerating pipe 5 is connected with the low-pressure input end 12 of the compressor 1 through a pipeline 9.

The refrigeration pipe 5 is positioned in the cold water tank 6.

Wherein the refrigerant circulates through the compressor 1, the condenser 2, the capillary tube 3, the bypass solenoid valve 4 and the refrigeration tube 5 in sequence through a pipeline 9.

In this embodiment, when the air water generator needs to cool water, the refrigeration function is started, the bypass electromagnetic valve 4 is in an open state, so that the refrigerant only needs to circulate through the compressor 1, the condenser 2, the capillary tube 3, the bypass electromagnetic valve 4 and the refrigeration pipe 5, the flow path of the refrigerant is reduced, the refrigeration cycle of the refrigeration device is further shortened, and the refrigeration speed is improved; the refrigerating pipe 5 is positioned in the cold water tank 6, the refrigerating pipe 5 is directly contacted with water in the cold water tank 6 to perform refrigeration, namely, the cold energy is directly transmitted to the water in the cold water tank 6, and the cold energy is not transmitted to the water in the cold water tank 6 after passing through the cold water tank 6, so that the refrigeration conduction effect can be improved, and the refrigeration speed is further improved.

In this embodiment, referring to fig. 1-2, there are two bypass solenoid valves 4, and the two bypass solenoid valves 4 can accelerate the speed of the refrigerant changing from the high-temperature high-pressure liquid to the low-temperature low-pressure liquid, so as to further increase the refrigeration speed of the refrigeration device.

Each bypass electromagnetic valve 4 is provided with a first input end 41, a first output end 42 and a second output end 43, and the first input end 41 can be communicated with only one of the first output end 42 and the second output end 43 at the same time, namely, when the bypass electromagnetic valve 4 is in an open state, the first input end 41 is communicated with the first output end 42; when the bypass solenoid valve 4 is in a closed state, the first input end 41 is communicated with the second output end 43; each bypass solenoid valve 4 is provided with one capillary tube 3 in a matching way, the condenser 2 is provided with two condensation output ends, and each condensation output end corresponds to one condensation input end.

The refrigerating device further comprises a first Y-shaped interface 7 and a second Y-shaped interface 8, wherein the first Y-shaped interface 7 comprises an input end and two output ends, and the two output ends of the first Y-shaped interface 7 are positioned on the same side; the second Y-interface 8 comprises two inputs and one output, wherein the two inputs of the second Y-interface 8 are located on the same side.

The high-pressure output end 11 of the compressor 1 is connected with the input end of the first Y-shaped interface 7 through a pipeline 9, one of the output ends of the first Y-shaped interface 7 is connected with the condensation input end at the upper part of the condenser 2 through the pipeline 9, the condensation output end corresponding to the condensation input end at the upper part of the condenser 2 is connected with the input end of one of the capillaries 3, the output end of one of the capillaries 3 is connected with the first input end 41 of one of the bypass solenoid valves 4, and the first output end 42 of one of the bypass solenoid valves 4 is connected with one of the input ends of the second Y-shaped interface 8 through the pipeline 9.

The other output end of the first Y-shaped interface 7 is connected with the condensation input end of the lower part of the condenser 2 through a pipeline 9, the condensation output end corresponding to the condensation input end of the lower part of the condenser 2 is connected with the input end of the other capillary tube 3, the output end of the other capillary tube 3 is connected with the first input end 41 of the other bypass electromagnetic valve 4, and the first output end 42 of the other bypass electromagnetic valve 4 is connected with the other input end of the second Y-shaped interface 8 through the pipeline 9.

Wherein the bypass solenoid valve 4 connected with the condensing input end of the upper part of the condenser 2 is positioned on the outer side wall of the upper part of the condenser 2, and the bypass solenoid valve 4 connected with the condensing input end of the lower part of the condenser 2 is positioned on the outer side wall of the lower part of the condenser 2.

The refrigerant is collected from two input ends of the second Y-shaped interface 8, and flows to the refrigeration tube 5 from the output end of the second Y-shaped interface 8. The evaporator 100 also has two evaporation inputs, which are each connected to a second output 43 of a bypass solenoid valve 4 via a line 9.

In this embodiment, in order to further increase the refrigerating speed, referring to fig. 3, the refrigerating pipe 5 is suspended in the cold water tank 6. The refrigerating pipe 5 is spiral, so that the length of the refrigerating pipe 5 can be prolonged in a limited space, the refrigerant in the refrigerating pipe 5 can uniformly absorb the heat of water in the cold water tank 6, and the refrigerating speed is improved.

The outer side wall of the cold water tank 6 is wrapped with a heat preservation layer 61, wherein the heat preservation layer 61 can slow down the rising speed of the temperature of cold water, and reduce the energy loss; the heat-insulating layer 61 is provided therein with a temperature sensing probe 62, the temperature sensing probe 62 is in contact with the outer side wall of the cold water tank 6, the temperature of the water in the cold water tank 6 is sensed by the temperature of the temperature sensing probe 62, and when the temperature of the water in the cold water tank 6 falls to a threshold value (the threshold value range is 6-16 ℃) set by the temperature sensing probe 62, an electric signal is sent to a control device of the air water generator, the refrigeration is stopped, the supercooling and the icing of the refrigeration tube 5 are prevented, the energy consumption is saved, and the water temperature is effectively controlled. In this embodiment, the heat-insulating layer 61 may be heat-insulating cotton, foam plastic, etc., wherein the heat-insulating cotton is preferable, and has good heat-insulating property, and can effectively prevent heat transfer, so that the temperature in the cold water tank 6 is more stable; the heat-insulating cotton has good sound absorption performance, and sound generated when water flows into and out of the cold water tank 6 can be insulated and damped; the heat-insulating cotton does not contain harmful substances, and is healthy and environment-friendly.

In this embodiment, the refrigerant is R22, R134a or R290, which is also referred to as a refrigerant, wherein the refrigerant is preferably R290.

The use flow of the utility model is as follows:

when the air water generator needs to manufacture cold water, a cold water key is pressed, a control device in the air water generator starts a bypass electromagnetic valve 4, a first input end 41 and a first output end 42 of the bypass electromagnetic valve are communicated, a refrigerant is compressed on the compressor 1 to form high-temperature high-pressure gas, the high-temperature high-pressure gas is discharged to the condenser 2 from the high-pressure output end 11, the high-temperature high-pressure refrigerant gas is radiated and liquefied on the condenser 2 to form high-temperature high-pressure refrigerant liquid, the high-temperature high-pressure refrigerant liquid is throttled by a capillary tube 3 to form low-temperature low-pressure refrigerant liquid, the low-temperature low-pressure refrigerant liquid flows in from the first input end 41, the first output end 42 flows out to a refrigerating tube 5, the low-temperature low-pressure refrigerant gas is formed by absorbing heat and gasifying in the refrigerating tube 5, and then the low-pressure refrigerant gas is absorbed into the compressor 1 from the low-pressure input end 12 of the compressor 1 to form circulation, namely the compressor 1-condenser 2-capillary tube 3-bypass the electromagnetic valve 4-the compressor 1.

Wherein the refrigerant liquid with low temperature and low pressure absorbs heat and gasifies in the refrigeration pipe 5, so that the heat of water in the cold water tank 6 is reduced, and the temperature of the water is reduced to form cold water.

The water making function and the refrigerating function of the air water making machine can only be used simultaneously, when the air water making machine needs to make water, the refrigerating function is stopped, at the moment, the bypass electromagnetic valve 4 is in a closed state, a refrigerant is compressed on the compressor 1 to form high-temperature and high-pressure gas, then the gas is discharged to the condenser 2 from the high-pressure output end 11, the high-temperature and high-pressure refrigerant gas is radiated and liquefied on the condenser 2 to form high-temperature and high-pressure refrigerant liquid, the high-temperature and high-pressure refrigerant liquid throttles by the capillary tube 3 to form low-temperature and low-pressure refrigerant liquid, the low-temperature and low-pressure refrigerant liquid flows in the first input end 41, the second output end 43 flows out into the evaporator 100, the low-temperature and low-pressure refrigerant liquid absorbs heat and gasifies in the evaporator 100 to form low-temperature and low-pressure refrigerant gas, and then the refrigerant gas sequentially passes through the second Y-shaped interface 8, the refrigerating tube 5 and the low-pressure input end 12 of the compressor 1 (at the moment, the refrigerant passing through the refrigerating tube 5 is low-temperature and low-pressure gas, water in the cold water tank 6 cannot be refrigerated), and is sucked into the compressor 1 to form circulation, namely the compressor 1-condenser 2-3-evaporator-4-evaporator-1-capillary tube bypass electromagnetic valve 1.

The air water generator according to the present utility model should further comprise other parts that the existing air water generator should have, such as a housing 101, an exhaust fan 102, a water tank 103, a water pump 104, a filter 105, a water outlet 106 and a heating device.

Wherein the compressor 1 and the water pump 104 are both positioned at the bottom of the air water generator, the water tank 103 is positioned above the compressor 1, the evaporator 100, the condenser 2 and the exhaust fan 102 are arranged above the water tank 103 side by side, and the filter 105, the cold water tank 6, the heating device and the water outlet 106 are arranged above the condenser 2.

The air exhauster 102 extracts external air to flow through the evaporator 100, moisture in the air can be liquefied into water drops by absorbing heat, the water drops are collected and dropped into the water tank 103 for collection and storage, then the water pump 104 is connected with the filter 105 and the water tank 103, the water in the water tank 103 is pumped into the filter 105 by the water pump 104 to be filtered into drinkable water, at the moment, the drinkable water can flow to the water outlet 106 through three pipelines, one pipeline flows to the cold water tank 6, and after the cold water tank 6 cools the water to form cold water, the cold water flows out through the water outlet 106; the other pipeline directly flows out (is normal-temperature water) through the water outlet 106; the last pipeline flows to the heating device to be heated into hot water, and then flows out through the water outlet 106.

The cold water tank 6 is also provided with a high-level water inlet pipe 63 and a low-level water outlet pipe 64, the high-level water inlet pipe 63 is communicated with the filter, and the low-level water outlet pipe 64 is communicated with a water outlet 106 flowing to the outside. Because the density of the cold water is greater than that of the normal temperature water, the cold water is sunk at the lower end of the cold water tank 6. Through the high-order setting of high-order inlet tube 63, the low-order setting of low-order outlet pipe 64, after high-order inlet tube 63 introduces the normal atmospheric temperature water, the normal atmospheric temperature water level is in the inside top of cold water tank 6, and cold water is located the inside below of cold water tank 6 to can follow low-order outlet pipe 64 and discharge, thereby guarantee that the temperature of the cold water of discharge does not receive the influence of normal atmospheric temperature water.

It is apparent that the above-described embodiments are only some embodiments of the present utility model, but not all embodiments, and the preferred embodiments of the present utility model are shown in the drawings, which do not limit the scope of the patent claims. This utility model may be embodied in many different forms, but rather, embodiments are provided in order to provide a thorough and complete understanding of the present disclosure. Although the utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing description, or equivalents may be substituted for elements thereof. All equivalent structures made by the content of the specification and the drawings of the utility model are directly or indirectly applied to other related technical fields, and are also within the scope of the utility model.

Claims (9)

1. A refrigerating device for an air water machine, which is characterized by comprising a compressor (1), a condenser (2), a capillary tube (3), a bypass electromagnetic valve (4) and a refrigerating pipe (5);

a compressor (1), a condenser (2) and a cold water tank (6) are sequentially arranged in the air water generator from top to bottom;

the high-pressure output end (11) of the compressor (1) is connected with the input end of the condenser (2) through a pipeline (9), the output end of the condenser (2) is connected with the input end of the capillary tube (3), the output end of the capillary tube (3) is connected with the input end of the bypass electromagnetic valve (4), the output end of the bypass electromagnetic valve (4) is connected with the input end of the refrigerating pipe (5) through the pipeline (9), and the output end of the refrigerating pipe (5) is connected with the low-pressure input end (12) of the compressor (1) through the pipeline (9);

the refrigerating pipe (5) is positioned in the cold water tank (6);

when the bypass electromagnetic valve (4) is in an open state, the refrigerant sequentially circulates through the compressor (1), the condenser (2), the capillary tube (3), the bypass electromagnetic valve (4) and the refrigerating tube (5) through the pipeline (9).

2. A refrigeration apparatus for an air-to-water machine as set forth in claim 1 wherein,

the bypass electromagnetic valve (4) is provided with a first input end (41), a first output end (42) and a second output end (43);

the output end of the capillary tube (3) is connected with the first input end (41), and the first output end (42) is connected with the input end of the refrigeration tube (5) through a pipeline (9);

the second output end (43) is used for being communicated with the input end of the evaporator (100).

3. A refrigeration apparatus for an air-to-water machine as set forth in claim 2 wherein,

two bypass solenoid valves (4) are arranged, each bypass solenoid valve (4) is provided with one capillary tube (3) in a matching way, and the condenser (2) is provided with two condensation output ends;

the condensation output end at the upper part of the condenser (2) is connected with the first input end (41) of one bypass electromagnetic valve (4) through a capillary tube (3), and the condensation output end at the lower part of the condenser (2) is connected with the first input end (41) of the other bypass electromagnetic valve (4) through the capillary tube (3).

4. A refrigeration apparatus for an air-to-water machine as claimed in claim 3, wherein,

the refrigeration device also comprises a first Y-shaped interface (7) which comprises an input end and two output ends;

each condensation output end of the condenser (2) is correspondingly provided with a condensation input end;

two output ends of the first Y-shaped interface (7) are positioned on the same side, one output end of the first Y-shaped interface (7) is connected with a condensation input end at the upper part of the condenser (2) through a pipeline (9), and the other output end of the first Y-shaped interface (7) is connected with a condensation input end at the lower part of the condenser (2) through the pipeline (9);

the input end of the first Y-shaped interface (7) is connected with the high-pressure output end (11) of the compressor (1) through a pipeline (9).

5. A refrigeration apparatus for an air-to-water machine as claimed in claim 3, wherein,

the refrigeration device also comprises a second Y-shaped interface (8) which comprises two input ends and an output end;

wherein two input ends of the second Y-shaped interface (8) are positioned on the same side, and an output end of the second Y-shaped interface (8) is connected with an input end of the refrigeration pipe (5) through a pipeline (9);

the first output ends (42) of the two bypass solenoid valves (4) are respectively connected with one input end of the second Y-shaped interface (8) through pipelines (9).

6. A refrigeration apparatus for an air-to-water machine as set forth in claim 1 wherein,

the refrigerating pipe (5) is hung in the cold water tank (6).

7. A refrigeration apparatus for an air-to-water machine as set forth in claim 1 wherein,

the refrigerating pipe (5) is spiral.

8. A refrigeration apparatus for an air-to-water machine as set forth in claim 1 wherein,

the refrigerant is R22 or R134a or R290.

9. A refrigeration apparatus for an air-to-water machine as set forth in claim 1 wherein,

the outer side wall of the cold water tank (6) is wrapped with an insulating layer (61).