KR101287610B1 - Cooling unit of cool water ionizer - Google Patents

Abstract

The present invention relates to a cooling unit of a cold water ionizer, comprising: a cold storage tube having an accommodating space therein for accommodating a cold storage agent; A cooling unit installed in the accommodation space to cool the coolant, a temperature sensor installed in the accommodation space to measure the temperature of the coolant, and a temperature of the coolant based on the temperature information measured by the temperature sensor. It is provided with a temperature control unit for controlling the cooling unit so that the temperature is maintained below a predetermined temperature.
The cooling unit of the cold ion water purifier according to the present invention is provided with means for controlling the refrigerant temperature of the evaporator according to the temperature of the coolant to heat exchange with the raw water, so that the coolant is cooled by lowering the temperature of the coolant even if the temperature of the coolant increases rapidly. There is an advantage that can supply cold water stably.

Description

Cooling unit of cool water ionizer

The present invention relates to a cooling unit of a cold ionizer, and more particularly, to a cooling unit of a cold ionizer for cooling raw water by exchanging raw water with a low temperature coolant and a refrigerant.

In general, as the standard of living has been rapidly improved in recent years, the cold ionized water is widely used in homes and offices.

In order to use such a cold water heater, press the operation lever to apply an open signal to open the water outlet, and transfer the selected drinking water through the inner pipe to supply the reservoir.

As such, the conventional cold ion water heater is provided with a cooling unit for supplying the purified drinking water to cool, and this cooling unit is usually operated by the refrigerant cycle.

That is, the case of the cold water heater is provided with a compressor, a condenser, an expansion valve, an evaporator, a refrigerant pipe, and the like.

First, tap water is filtered with a filter to make drinking water, such as ionized water or purified water, and supplied to the cold water coil of the cooling unit, and an evaporator is installed inside the cold water coil to supply cold water of the evaporator to the coolant stored in the water tank and delivered to the cold water coil. Convert to cool and supply to the user to drink.

Korean Unexamined Patent Publication No. 10-2011-0068250 discloses a 'cooling unit for a cold ion water heater'.

The cooling unit of the cold water heater is a cooling unit is installed in the case, the case is installed in a state in which the cooling water is stored in the storage tank, the bottom of the storage tank, the cold water coil, the cold water coil to move the drinking water, , An evaporator for supplying cold air to the cooling water and an agitator installed above the evaporator to stir the cooling water.

However, since the cooling unit of the cold water heater is not provided with a means for controlling the refrigerant temperature of the evaporator, when the temperature of the cooling water increases rapidly, it takes a lot of time to lower the temperature of the cooling water and the cooling rate for drinking water is lowered. have.

The present invention has been made to improve the above problems, and an object of the present invention is to provide a cooling unit of a cold ion water heater provided with means for adjusting the refrigerant temperature of the evaporator according to the temperature of the heat storage agent.

The cooling unit of the cold ion water purifier according to the present invention for achieving the above object is a cold storage tube provided with an accommodating space for accommodating the coolant therein, and installed inside the cold storage tube, the raw water flows therein to exchange heat with the coolant A raw water pipe, a cooling unit installed in the accommodation space to cool the coolant, a temperature sensor installed in the accommodation space to measure the temperature of the coolant, and the temperature information measured by the temperature sensor. It is provided with a temperature control unit for controlling the cooling unit so that the temperature of the cool storage agent is maintained below a predetermined temperature.

In addition, it is preferable to further include a plurality of auxiliary storage cooling member accommodated in the receiving space, formed of a metallic material in order to increase the storage capacity of the storage cooling pipe.

On the other hand, the raw water tank containing the raw water, the discharge pipe is installed in communication between the raw water tank and the raw water pipe, the supply pump is installed in the discharge pipe to pump the raw water contained in the raw water tank and supply to the raw water pipe; And a freezing prevention unit that maintains the temperature of the coolant to be above the freezing point of the raw water in order to prevent the raw water in the raw water pipe from freezing when the raw water is stagnated in the raw water pipe. Is a communication tube connected to the discharge pipe, an extension formed at an end of the communication tube, a heat exchange tube for exchanging the raw water contained in the raw water tank with the coolant, and connected to an end of the heat exchanger tube to be connected to the coolant. And a freezing prevention pipe portion provided with a return pipe for returning the raw water heat exchanged with the raw water tank, and the discharge pipe; The on-off valve installed between the communication tube and the raw water in the raw water congestion, the discharge valve and the communication tube to control the on-off valve so that the raw water flows into the freezing prevention tube portion, and control the on-off valve, the temperature of the coolant When the raw water rises above the freezing point of the raw water or the raw water flows in the raw water pipe, the valve control unit for controlling the open and close valve so that the communication pipe is closed so that the inflow of the raw water into the freezing prevention pipe portion.

The heat exchanger tube is extended to spirally wound along the outer circumferential surface of the cold storage tube.

In addition, the heat exchange tube is installed in the heat storage tube at a position adjacent to the raw water pipe, it may be formed to extend in parallel with the longitudinal direction of the raw water pipe.

On the other hand, the cooling unit of the cold ion water purifier according to the present invention is to cool the raw water and the raw water pipe flowing the raw water flowing from the raw water supply unit, the spiral along the outer circumferential surface of the raw water pipe to heat exchange the coolant with the raw water The first and second refrigerant circulation pipes configured to connect the evaporator wound around the condenser, the condenser condensing the refrigerant, the evaporator and the condenser, and the refrigerant flowing therein, and the first refrigerant circulation pipe installed in the An expansion valve for controlling the flow of the refrigerant and a cooling unit provided with a compressor provided in the second refrigerant circulation pipe.

In addition, the cooling unit of the cold ion water purifier according to the present invention is to cool the raw water and the raw water pipe flowing the raw water flowing from the raw water supply unit, so that the raw water pipe is penetrated therein to heat exchange the low temperature refrigerant with the raw water; An evaporator installed, a condenser for condensing the refrigerant, a first circuit and a second refrigerant circulation pipe in which a refrigerant flows therein by connecting the evaporator and the condenser, and a refrigerant flowing therein; It is preferable to have an expansion valve for controlling the flow and a cooling unit provided with a compressor installed in the second refrigerant circulation pipe.

The cooling unit of the cold ion water purifier according to the present invention is provided with means for controlling the refrigerant temperature of the evaporator according to the temperature of the coolant to heat exchange with the raw water, so that the coolant is cooled by lowering the temperature of the coolant even if the temperature of the coolant increases rapidly. There is an advantage that can supply cold water stably.

1 is a circuit diagram of a cold water heater equipped with a cooling unit according to an embodiment of the present invention,
2 is a cross-sectional view of a cooling unit according to another embodiment of the present invention;
3 is a cross-sectional view of a cooling unit of a cold ion water heater according to another embodiment of the present invention;
Figure 4 is a cross-sectional view of the cooling unit of the cold ion water heater according to another embodiment of the present invention,
5 is a cross-sectional view of a cooling unit of a cold ion water heater according to another embodiment of the present invention,
6 is a cross-sectional view of a cooling unit of a cold ion water heater according to another embodiment of the present invention.

 Hereinafter, with reference to the accompanying drawings will be described in more detail the cooling unit of another cold ionizer in the preferred embodiment of the present invention.

1 is a cold ion water heater is provided with a cooling unit according to an embodiment of the present invention.

Referring to the drawings, the cold water heater is a cold water heater 10 is a raw water tank 310 to store the raw water supplied from the water, the filter unit 20 for purifying the raw water stored in the raw water tank 310, and the filter unit Cooling unit 100 for cooling the raw water purified from 20, and the electrolytic cell 30 for separating the raw water cooled from the cooling unit 100 by alkaline water and acidic water. The filter unit 20 includes a dust filter 21, a pretreatment filter 22, and a water filter 23 to filter raw water in multiple stages. The raw water supplied from the tap water is filtered through the filter unit 20, and then cooled through the cooling unit 100, and separated into alkaline water and acidic water by the electrolytic cell 30. At this time, the connection pipe 40 is installed between the filter unit 20 and the electrolytic cell 30 so that the raw water discharged from the filter unit 20 may flow into the electrolytic cell 30 without passing through the cooling unit 100. have.

Referring to the cooling unit 100 of the cold ion water heater according to the present invention in detail.

Cooling unit 100 of the cold water heater is installed in the cold storage pipe 110, the storage space for accommodating the coolant therein, the inside of the cold storage pipe 110, the raw water flows through the raw water inside the heat exchanger with the coolant 120, a cooling unit 130 installed in the accommodation space to cool the coolant, a temperature sensor 140 installed in the accommodation space to measure the temperature of the coolant, and a temperature sensor 140. The temperature control unit 150 controls the cooling unit 130 to maintain the temperature of the coolant based on the temperature information measured through the predetermined temperature or less.

The cold storage pipe 110 is provided with the accommodation space therein, is formed in a pipe shape with both ends closed, and a predetermined length is formed. The cold storage pipe 110 is formed of a flexible synthetic resin material so that it can be easily bent in accordance with the installation position inside the cold water heater, it is preferable that the heat insulation layer is formed on the inner wall surface to prevent the transfer of heat to the inside. .

In addition, the auxiliary tank 111 is provided on the upper outer peripheral surface of the cold storage tube 110 to communicate with the receiving space. The auxiliary tank 111 is provided with an inner space so that the coolant is stored therein so as to replenish the coolant in the cold storage tube 110. In addition, when the coolant is frozen by the cooling unit 130 and the volume thereof expands, a part of the coolant may be introduced into the auxiliary tank 111.

The cool storage agent absorbs cold air supplied from the cooling unit 130 and cools the raw water flowing through the raw water pipe 120. It is preferable to use a polymer alcohol-based liquid or a polymer having a material having a lower freezing point than the raw water. Do.

The raw water pipe 120 is provided with a flow path through which raw water flows, and is connected to the outlet of the purified water filter 23 of the filter unit 20 so that raw water filtered from the filter unit 20 may be introduced. The raw water pipe 120 is installed to penetrate inside the cold storage pipe 110 so as to exchange heat with the coolant of the cold storage pipe 110, and is installed in parallel with the longitudinal direction of the cold storage pipe 110. The raw water pipe 120 is preferably formed of a flexible synthetic resin material so that it can be easily bent according to the installation position inside the cold ion water heater.

The cooling unit 130 connects the condenser 131 installed outside the cold storage tube 110, the evaporator 132 installed in the cold storage tube 110 to be immersed in the coolant, and the condenser 131 and the evaporator 132. And a expansion valve 135 installed in the first and second refrigerant circulation pipes 133 and 134 through which the refrigerant flows, the first refrigerant circulation pipe 133, and controlling the flow of the refrigerant, and the second refrigerant. The compressor 136 is installed in the circulation pipe 134.

The evaporator 132 is formed in a pipe shape provided with a flow path through which a low-temperature refrigerant flows, and is wound in a plurality of times to form a spiral shape. Evaporator 132 is preferably installed in the cold storage pipe 110 side by side in the longitudinal direction of the raw water pipe (120).

The low temperature and high pressure liquid refrigerant condensed by the condenser 131 passes through the expansion valve 135 through the first refrigerant circulation pipe 133, and is decompressed by the expansion valve 135 to be in a low temperature low pressure state. The refrigerant, which is in a low pressure state by the expansion valve 135, enters the evaporator 132 through the first refrigerant circulation pipe 133, and the refrigerant introduced into the evaporator 132 exchanges heat with the cooling water to cool the cooling water.

The low-temperature, low-pressure gaseous refrigerant evaporated by absorbing heat from the cooling water through the evaporator 132 flows into the compressor 136 through the second refrigerant circulation pipe 134. By the compressor 136, the low temperature low pressure refrigerant is brought into the condenser 131 at a high temperature and high pressure.

The temperature controller 150 is connected to the temperature sensor 140 and the cooling unit 130 so that the temperature of the coolant is maintained below a preset temperature based on the temperature information measured by the temperature sensor 140. To control. The user sets the upper limit temperature and the lower limit temperature of the coolant, and when the temperature of the coolant measured by the temperature sensor 140 is higher than the maximum limit temperature, the compressor 136 or the expansion valve of the cooling unit 130. The control unit 135 controls the temperature of the refrigerant supplied to the evaporator 132.

When the temperature of the coolant measured by the temperature sensor 140 is lower than the minimum limit temperature, the temperature controller 150 stops the operation of the cooler 130 to stop the cooling of the coolant through the evaporator 132. Therefore, due to the freezing of the coolant to prevent the freezing pipe 110 is frozen or the raw water pipe 120 is broken. At this time, the minimum temperature is preferably set to a temperature corresponding to the freezing point of the coolant.

Referring to the operation of the cooling unit 100 of the cold ion water heater according to the present invention configured as described above in detail as follows.

The raw water filtered by the filter unit 20 flows into the raw water pipe 120, and the raw water introduced into the raw water pipe 120 passes through the cold storage pipe 110 and exchanges heat with the coolant. The coolant in the cold storage tube 110 is cooled by a low temperature refrigerant passing through the evaporator 132 of the cooling unit 130 to maintain a low temperature. Thus, the raw water passing through the raw water pipe 120 is cooled by the coolant. And discharged into the electrolytic cell. At this time, the temperature storage tube 110 is installed in the cold storage pipe 110 to measure the temperature of the coolant, and the temperature control unit 150 is less than or equal to a predetermined temperature based on the temperature measured by the temperature sensor 140. The cooling unit 130 is controlled to be maintained.

The cooling unit 100 of the cold water heater configured as described above is provided with means for controlling the refrigerant temperature of the evaporator 132 according to the temperature of the coolant to heat exchange with the raw water, so that even if the temperature of the coolant rapidly increases Since the coolant is cooled by lowering the temperature, there is an advantage that the cold water can be stably supplied.

On the other hand, Figure 2 shows a cooling unit 200 of the cold ion water heater according to another embodiment of the present invention.

Elements having the same functions as those in the previous drawings are denoted by the same reference numerals.

Referring to the drawings, the cooling unit 200 is provided with a plurality of auxiliary storage refrigeration member 201 accommodated inside the storage cooling pipe 110 to increase the storage capacity of the storage cooling pipe (110). The auxiliary storage cooling member 201 is formed in a spherical shape of a metallic material such as stainless steel or copper so as to be easily cooled by cold air supplied from the evaporator 132.

The auxiliary storage refrigeration member 201 is filled by the cold air supplied from the evaporator 132 and filled in the storage cooling pipe 110. The cooled sub-cooling member 201 keeps the coolant in a low temperature state for a relatively long time by supplying cold air to the coolant even if the cold air supply to the evaporator 132 is stopped.

In addition, Figure 3 shows a cooling unit 300 of the cold ion water heater according to another embodiment of the present invention.

Referring to the drawings, the cooling unit 300 of the cold water heater is a discharge pipe 320 is installed in communication between the raw water tank 310 and the raw water pipe 120 and the discharge pipe 320 is installed in the raw water tank ( A supply pump 330 for pumping the raw water accommodated in 310 and supplying the raw water pipe 120 to the raw water pipe 120; and when the raw water is stagnated in the raw water pipe 120, the raw water in the raw water pipe 120 is frozen. In order to prevent the cold storage unit 340 is provided to maintain the temperature of the coolant above the freezing point of the raw water.

The raw water tank 310 is installed between the filter unit and the raw water pipe 120 and is provided with a receiving space for receiving raw water therein.

The discharge pipe 320 is formed of a tubular body provided with a flow path through which raw water flows, and preferably formed of a flexible synthetic resin material so that the discharge pipe 320 can be easily bent in the cold ion water heater. The discharge pipe 320 is connected in communication with the raw water pipe 120 and the freezing prevention tube portion 341 of the freezing prevention unit 340 to be described later.

The cryoprotection unit 340 is in communication with the discharge pipe 320, the cryoprotective pipe portion 341 that exchanges heat with the coolant in the cold storage tube 110, and the opening and closing valve installed in the discharge pipe 320 and the cryoprotective pipe portion 341. 342 and a valve control unit 343 for controlling the on-off valve 342 so that raw water can flow into the freezing prevention tube part 341.

The cryoprevention tube part 341 is formed in the communication tube 344 connected to the discharge pipe 320 in communication with the end of the communication tube 344 and heat-exchange the raw water contained in the raw water tank 310 with the coolant And a return tube 346 connected to an end of the heat exchange tube 345 to return the raw water exchanged with the coolant to the raw water tank 310.

It is preferably connected to the discharge pipe 320 by the opening and closing valve 342 of the communication pipe 344, it is preferably formed of a flexible synthetic resin material to bend easily.

The heat exchange tube 345 is formed to extend at the end of the communication tube 344, and is formed to be spirally wound along the outer circumferential surface of the cold storage tube 110 so as to easily exchange heat with the cold storage agent of the cold storage tube 110. Some of the raw water contained in the raw water tank 310 flows along the heat exchange tube 345 and exchanges heat with the coolant to prevent the coolant from freezing.

Meanwhile, another embodiment of the heat exchanger tube 350 is illustrated in FIG. 4.

Referring to the drawings, the heat exchange tube 350 is installed inside the cold storage pipe 110 at a position adjacent to the raw water pipe 120, and is formed to extend in parallel with the longitudinal direction of the raw water pipe 120. The heat exchange tube 350 flows raw water into the cold storage tube 110 to prevent freezing of the coolant and the raw water in the cold storage tube 110.

The opening and closing valve 342 is a supply pipe of the discharge pipe 320, the communication pipe 344 and the filter unit 20 to selectively communicate the supply pipe 25 of the discharge pipe 320, the communication pipe 344 and the filter unit 20 It is preferable that it is a three-way valve installed in the connection part of (25).

The valve control unit 343 is the on-off valve 342 so that the discharge pipe 320 and the communication tube 344 communicate with each other so that the raw water flows into the freezing prevention tube part 341 when the raw water is stagnated in the raw water pipe 120. And control the temperature of the coolant to rise above the freezing point of the raw water, or when the raw water flows in the raw water pipe 120, the communication tube so that the inflow of the raw water to the cryoprevention pipe part 341 is blocked. The on-off valve 342 is controlled to close 344. At this time, the valve control unit 343 is connected to the temperature sensor 140 for measuring the temperature of the coolant receives the temperature information of the coolant.

Referring to the operation of the cryoprotection unit 340 configured as described above in detail as follows.

When the user stops the operation of the cold water heater and the raw water is stagnated in the raw water pipe 120, the valve control unit 343 is connected to the discharge pipe 320 and the communication pipe (320) so that the raw water of the raw water tank 310 into the communication tube 344. 344 is in communication, but the supply pipe 25 of the filter unit 20 controls the on-off valve 342 to be closed. The relatively high temperature raw water contained in the raw water tank 310 is introduced into the heat exchange tubes 345 and 350 through the communication tube 344. The raw water introduced into the heat exchange tubes 345 and 350 flows along the heat exchange tubes 345 and 350 and exchanges heat with the coolant. At this time, the high temperature hot water heats the coolant to prevent the temperature of the coolant from falling below the freezing point of the raw water. The raw water passing through the heat exchange tubes 345 and 350 is returned to the hot water tank through the return tube 346.

When the user operates the cold water heater or the temperature of the coolant through the temperature sensor 140 is higher than the freezing point of the raw water, the valve control unit 343 is in communication with the discharge pipe 320 and the supply pipe 25 of the filter unit 20 However, the communication pipe 344 controls the on-off valve 342 to close.

As mentioned above, the cooling unit 300 of the cold water heater according to the present invention includes a freezing prevention unit 340, and when the cold water heater is not in operation, the raw water in the raw water tank 310 is exchanged with the coolant to accumulate the coolant. It prevents falling below the freezing point of the raw water to prevent the raw water pipe 120 is broken.

On the other hand, Figure 5 shows a cooling unit 400 of the cold ion water heater according to another embodiment of the present invention.

Referring to the drawings, the cooling unit 400 of the cold water heater is a raw water pipe 120 through which the raw water introduced from the raw water supply unit flows, and the evaporator 410 that cools the raw water and heat-exchanges the coolant with the raw water. And a condenser 131 for condensing the refrigerant, connecting the evaporator 410 and the condenser 131 to form a closed circuit, and having a refrigerant flowing therein; An expansion valve 135 installed in the first refrigerant circulation tube 133 and controlling the flow of the refrigerant, and a cooling unit 130 provided with a compressor 136 installed in the second refrigerant circulation tube 134. .

The raw water pipe 120 and the condenser 131 of the cooling unit, the first and second refrigerant circulation pipes 133 and 134, the compressor 136, and the expansion valve 135 are the raw water pipe 120 of the embodiment of the present invention shown in FIG. ) And the condenser 131, the first and second refrigerant circulation tubes 133 and 134, the compressor 136, and the expansion valve 135 of the cooling unit 130, and thus, detailed description thereof will be omitted.

The evaporator 410 is formed to spirally wound along the outer circumferential surface of the raw water pipe 120 so that the low-temperature refrigerant flowing therein can easily exchange heat with the raw water of the raw water pipe 120. At this time, the temperature sensor 140 is installed inside the evaporator 410 to measure the temperature of the refrigerant, the temperature control unit 150 is connected to the temperature sensor 140 and the cooling unit 130 through the temperature sensor 140 The cooling unit 130 is controlled to maintain the coolant below a preset temperature based on the measured temperature information. The user sets the maximum limit temperature of the refrigerant, and when the temperature of the refrigerant measured by the temperature sensor 140 is higher than the maximum limit temperature, the user controls the compressor 136 or the expansion valve 135 of the cooling unit 130 The temperature of the refrigerant supplied to the evaporator 410 is lowered.

On the other hand, Figure 6 shows an evaporator 420 according to another embodiment of the present invention.

Referring to the drawings, the evaporator 420 is formed in a cylindrical shape having a predetermined internal space so that the raw water pipe 120 may be installed therethrough. The low temperature refrigerant supplied into the evaporator 420 heats the raw water of the raw water pipe 120 penetrated inside the evaporator 420 to cool the raw water.

 At this time, the temperature sensor 140 is installed inside the evaporator 420 to measure the temperature of the refrigerant, the temperature control unit 150 is connected to the temperature sensor 140 and the cooling unit 130 through the temperature sensor 140 The cooling unit 130 is controlled to maintain the coolant below a preset temperature based on the measured temperature information. The user sets the maximum limit temperature of the refrigerant, and when the temperature of the refrigerant measured by the temperature sensor 140 is higher than the maximum limit temperature, the user controls the compressor 136 or the expansion valve 135 of the cooling unit 130 The temperature of the refrigerant supplied to the evaporator 420 is lowered.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art.

Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

100: cooling unit
110: cold storage tube
111: auxiliary tank
120: raw water pipe
130: cooling unit
131: condenser
132: evaporator
133: first refrigerant circulation tube
134: second refrigerant circulation tube
135: expansion valve
136: compressor
140: temperature sensor
150: temperature control unit
310: raw water tank
320: discharge pipe
330: supply pump
340: freeze protection unit

Claims (7)

A cold storage tube provided with an accommodation space in which a coolant is stored;
A raw water pipe installed inside the cold storage pipe and having raw water flowing therein to exchange heat with the coolant;
A cooling unit installed in the accommodation space to cool the coolant;
A temperature sensor installed in the accommodation space and measuring a temperature of the coolant;
A temperature control unit controlling the cooling unit such that the temperature of the coolant is maintained below a preset temperature based on the temperature information measured by the temperature sensor;
And a freezing prevention unit that maintains the temperature of the coolant to be above the freezing point of the raw water to prevent the raw water in the raw water pipe from being frozen when the raw water is stagnated in the raw water pipe.
The freeze protection unit is
A communication tube connected to the raw water tank containing the raw water and the discharge pipe installed between the raw water pipe, and a heat exchange tube connected to the communication pipe and installed in the cold storage pipe to heat-exchange the raw water contained in the raw water tank with the cold storage agent; And a freezing prevention pipe portion connected to an end of the heat exchange tube and provided with a return tube for returning the raw water exchanged with the coolant to the raw water tank;
An opening / closing valve installed at the communicating tube to open and close the communicating tube;
When the raw water is stagnated in the raw water pipe, the opening and closing valve is controlled to communicate with the discharge pipe and the communication pipe so that the raw water flows into the heat exchange pipe, the temperature of the coolant rises above the freezing point of the raw water or the raw water pipe And a valve control unit controlling the open / close valve to close the communication tube so that the inflow of the raw water into the heat exchange tube is blocked when the raw water flows therein.
The method of claim 1,
And a plurality of auxiliary storage refrigeration members, which are accommodated in the accommodation space to increase the storage capacity of the storage cold storage tube, and are formed of a metallic material.
delete The method of claim 1,
The heat exchange tube is a cooling unit of the cold ion water heater, characterized in that the extension is formed to spirally wound along the outer peripheral surface of the cold storage tube.
The method of claim 1,
The heat exchange tube is installed in the cold storage tube at a position adjacent to the raw water pipe, the cooling unit of the cold ion water heater, characterized in that extending in parallel with the longitudinal direction of the raw water pipe.














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