JPH076665U - Water heater - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a chiller / heater that prevents a significant decrease in efficiency even when switching between heating and cooling. [Structure] When the water is heated by switching from cooling to heating, the temperature of the water storage tank 4 is detected by the heating temperature sensor 9,
When the detected temperature is equal to or lower than the predetermined value, the solenoid valve 21 is opened and the drain water is discharged through the drain pipe 20. The solenoid valve 14 is opened and water is supplied from the lower water supply pipe 12 to operate the heater 6 to heat it. When switching from warming to cooling to cool water, the cooling temperature sensor 10 detects the temperature of the water storage tank 4,
When the detected temperature is equal to or higher than the predetermined value, the solenoid valve 21 is opened and the drain water is discharged through the drain pipe 20. The solenoid valve 13 is opened and water is supplied from the water supply pipe 11 on the upper side to bring the water close to room temperature and then the cooling device 25 is operated to cool the water, thereby preventing the cooling device 25 from being overloaded.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a water heater that cools and heats the contents of one water storage tank.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, there has been known a cold / hot water heater that heats water, which is the content of a water storage tank, by a heating device to turn it into hot water and, at the same time, cools the water by switching it by a cooling device.

[0003]

[Problems to be solved by the device]

 However, in the case where the cooling device or the heating device is used to cool the water to make it cold as described above, or the water is heated to make hot water, for example, when the cooling device is switched to the heating device. In the case of heating from cooling water to hot water, on the contrary, when switching from the heating device to the cooling device, the hot water must be cooled to cold water, and the temperature to be changed is very large. There is a problem that the cooling and heating efficiency at the time of switching becomes very poor.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a chiller / heater that prevents a significant decrease in efficiency when switching between heating and cooling. .

[0005]

[Means for Solving the Problems]

 The hot and cold water dispenser of the present invention has a cooling and heating device, and a water storage tank for storing and cooling and heating the contents by this selection, and a supply control means for supplying the contents to the water storage tank, Discharge control means for discharging the contents of this water storage tank, a temperature sensor for detecting the temperature of this water storage tank, and switching from cooling to heating to heat the contents, the temperature sensor detects the temperature. If the temperature is less than or equal to a predetermined value, the discharge control means discharges the contents, and then the supply control means supplies the contents to heat them, and switches from heating to cooling. When cooling the contents, if the temperature detected by the temperature sensor is equal to or higher than a predetermined value, the discharge control means discharges the contents, and then the supply control means measures the contents. Control means for supplying and cooling the object Those were.

[0006]

[Action]

 The present invention switches from cooling to heating, and when heating the contents, the control means causes the discharge control means to control the contents when the temperature detected by the temperature sensor is below a predetermined value. After discharging, the supply control means supplies the contents to heat them, and switches from heating to cooling.When cooling the contents, the temperature detected by the temperature sensor by the control means is above a specified value. In this case, after the contents are discharged by the discharge control means, the contents are supplied by the supply control means, and the temperature is brought to near room temperature before the operation is started. In either case, the operation efficiency at the time of switching greatly decreases. Can be prevented.

[0007]

【Example】

 Hereinafter, an embodiment of the water heater of the present invention will be described with reference to the drawings.

As shown in FIG. 1, reference numeral 1 denotes a housing, which is located on the rear side and is provided with a water storage tank chamber 2, and is also located on the front side of the water storage tank chamber 2. A raw material tank chamber 3 is formed.

A water storage tank 4 is provided in the water storage tank chamber 2, and a float-type water level sensor 5 for detecting full water is provided in the water storage tank 4.

Further, a heater 6 as a heating device is disposed on the bottom surface of the water storage tank 4, and a cooling refrigerant pipe 7 that is spirally wound is disposed around the lower portion. Further, as shown in FIG. 2, a space 8 is arranged between the refrigerant pipe 7 and the water storage tank 4 to divide the circumferential direction into four equal parts, and a space is provided between the refrigerant pipe 7 and the water storage tank 4 at a predetermined interval. Is caused. A heating temperature sensor 9 is arranged above the water storage tank 4 in the height direction, and a cooling temperature sensor 10 for detecting the refrigerant temperature is arranged at the winding end of the refrigerant pipe 7.

Further, the water storage tank 4 is provided with water supply pipes 11 and 12 at the top and bottom of the water storage tank 4 in the height direction, and these water supply pipes 11 and 12 are provided respectively. Electromagnetic valves 13 and 14 are respectively provided as supply control means. Further, similarly, water outlet pipes 15 and 16 are arranged at the top and bottom of the water storage tank 4 in the height direction, respectively, and solenoid valves 17 and 18 are disposed at the water outlet pipes 15 and 16, respectively. There is. An overflow pipe 19 is provided slightly above the full height of the water storage tank 4, a drain pipe 20 is provided on the bottom surface, and a solenoid valve 21 as a discharge control means is provided on the drain pipe 20. There is.

Further, a well-known cooling device 25 including a compressor 26, a fan 27, a condenser 28 and the like that form a refrigeration cycle together with the refrigerant pipe 7 is provided at the bottom of the water storage tank chamber 2.

Further, an exhaust hole 31 is formed in the rear portion of the water storage tank chamber 2 so as to face the condenser 28, and a ventilation through hole is provided between the water storage tank chamber 2 and the raw material tank chamber 3. 32 are formed.

In the raw material tank chamber 3, a raw material tank 35 containing a concentrated liquid such as tea liquid is arranged, and a liquid discharge pipe 36 is provided in the raw material tank 35. Is provided with a solenoid valve 37. Further, the liquid discharge pipe 36 merges with the water discharge pipes 15 and 16 to form a supply pipe 38, and supplies the supply pipe 38 to the cup C placed on the cup station 40 provided below the raw material tank chamber 3.

Next, the operation of the above embodiment will be described.

As shown in the flow chart of FIG. 5, it is determined whether the cooling operation or the heating operation is performed with the contents in the water storage tank 4 (step 1).

First, in the cooling operation, the cooling device 25 is operated, and as shown in FIG. 6, the fan 27 is synchronized with the operation of the compressor 26 to cool the condenser 28 and heat is exchanged in the water storage tank 4. The compressor 26 and the fan 27 are intermittently operated according to the temperature of the refrigerant pipe 7. Then, it is cooled by the refrigerant pipe 7, and as shown in FIG. 2, ice is produced in a portion excluding the portion where the spacer 8 is not interposed. The ice above the water storage tank 4 can be easily separated and floats up, and the water above the water storage tank 4 in which the refrigerant pipe 7 is not wound can also be efficiently cooled. A cooling temperature sensor 10 attached to the refrigerant pipe 7 is used for temperature detection during cooling. In addition, since large annular ice is not formed in the water storage tank 4, it is possible to prevent the ice from blocking the inlets and outlets of the water supply pipes 11 and 12 and the water outlet pipes 15 and 16.

Next, it is judged whether or not the amount of water in the water storage tank 4 is equal to or more than a specified value (step 2). If the amount of water in the water storage tank 4 is equal to or more than the specified value, a water discharge instruction is issued. If so, the lower solenoid valve 18 where cold water is accumulated is opened, and cold water is supplied from the cup station 40 through the water supply pipe 16 and the supply pipe 38 (step 3). At this time, the electromagnetic valve 37 is opened to mix the raw material from the raw material tank 35.

When the amount of water in the water storage tank 4 is equal to or less than the specified value, the solenoid valve 13 is opened to supply water from the water supply pipe 11 (step 4). In this way, during the cooling operation, water is supplied from the water supply pipe 11 to the upper part of the water storage tank 4 and from the lower part of the water storage tank 4 to the cup C of the cup station 40 via the water discharge pipe 16. , The cold water in the storage tank 4 is not agitated by the water supply, but in normal times, the cold water is reliably and efficiently supplied. Furthermore, it is judged again whether or not the amount of water in the water storage tank 4 is equal to or more than the specified value (step 5). If the amount of water in the water storage tank 4 is less than or equal to the specified value, the process returns to step 4, If the value is equal to or more than the specified value, the solenoid valve 18 is closed (step 6) and it is determined whether a fixed time has passed (step 7).

Then, when the fixed time has not elapsed, the process returns to step 4, and when the fixed time has elapsed, the solenoid valve 14 is opened for a fixed time (step 8), and the water supply pipe that is not normally used is The water remaining in 12 is supplied to the water storage tank 4, and the water in this water supply pipe 12 is replaced. That is, at the time of normal cooling, the solenoid valve 13 is opened and water is supplied from the water supply pipe 11, so that the water that has not flowed in the other water supply pipe 12 is prevented from staying for a long period of time and is used sanitarily. This is because.

Further, when it is determined in step 1 that heating is performed, the heater 6 is operated. Further, the fan 27 is continuously operated to ventilate the inside of the raw material tank 35 to prevent the raw material tank 35 from being damaged, for example, the raw material such as concentrated tea liquor. Since the fan 27 uses the fan 27 for the cooling device 25, it is possible to prevent the configuration from becoming complicated.

Next, it is judged whether or not the amount of water in the water storage tank 4 is equal to or more than a specified value (step 9). If the amount of water in the water storage tank 4 is equal to or more than the specified value, a water discharge instruction is issued. When there is, the solenoid valve 17 on the upper side of the pool of hot water is opened, and hot water is supplied from the cup station 40 from the water discharge pipe 15 through the supply pipe 38 (step 10). At this time, the solenoid valve 37 is opened to mix with the raw material from the raw material tank 35.

When the amount of water in the water storage tank 4 is equal to or less than the specified value, the solenoid valve 14 is opened to supply water from the water supply pipe 12 (step 11). Thus, during the heating operation, water is supplied from the water supply pipe 12 to the lower part of the water storage tank 4, and hot water is supplied from above the water storage tank 4 to the cup C of the cup station 40 via the water discharge pipe 15. Therefore, in a normal use state, hot water above the inside of the water storage tank 4 is reliably and efficiently supplied without being stirred by the water supply. The temperature sensor 9 is used for temperature detection during heating. Furthermore, it is judged again whether the amount of water in the water storage tank 4 is equal to or more than the specified value (step 12). If the amount of water in the water storage tank 4 is less than or equal to the specified value, the process returns to step 11. When the value is equal to or more than the specified value, the solenoid valve 14 is closed (step 13), and it is determined whether a fixed time has passed (step 14).

Then, when the fixed time has not elapsed, the process returns to step 4, and when the fixed time has elapsed, the solenoid valve 13 is opened for a fixed time (step 15), and the water remaining in the water supply pipe 11 is retained. Is supplied to the water storage tank 4, and the water in the water supply pipe 11 is replaced. That is, during normal heating, since the solenoid valve 14 is opened to supply water from the water supply pipe 12, it is possible to prevent water that has not flowed in the other water supply pipe 11 from staying for a long time, and to maintain hygiene. This is for use.

Next, the operation of switching from heating to cooling will be described with reference to the flowchart shown in FIG.

First, the heater 6 is turned off (step 21), the heating temperature sensor 9 determines whether the temperature of the water storage tank 4 is equal to or higher than a specified value (step 22), and the temperature of the water storage tank 4 is specified. When the value is equal to or more than the value, the solenoid valve 21 is opened for a predetermined time and the hot water in the water storage tank 4 is discharged through the drain pipe 20 (step 23).

Next, the solenoid valve 13 is opened to start water supply from the water supply pipe 11 (step 24). Then, it is judged whether or not the water storage tank 4 is above the specified water level (step 25), and if it is below the specified water level, the process returns to step 24.

Then, when it is determined in step 25 that the water storage tank 4 is at or above the prescribed water level, it is again detected whether or not the temperature of the water storage tank 4 is below a predetermined value (step 26), and the water storage tank 4 is detected. If the temperature is less than the specified value, the cooling device 25 is operated to perform the cooling operation (step 27).

On the other hand, if it is determined in step 26 that the temperature is not lower than the specified temperature, an alarm is issued (step 28), reset (step 29), and the process returns to step 22. That is, in particular, when switching from heating to cooling, the low-temperature and low-pressure refrigerant gas is introduced into the refrigerant pipe 7 during the cooling operation, so the water in the water storage tank 4 remains at a high temperature. Then, in order to prevent an abnormal operation phenomenon in which the pressure balance of the refrigeration cycle is lost due to the heat and the compressor 26 is overloaded, the water is once brought close to room temperature.

On the contrary, the operation of switching from cooling to heating will be described with reference to the flowchart shown in FIG.

First, the cooling device 25 is turned off (step 31), the cooling temperature sensor 10 determines whether or not the temperature of the water storage tank 4 is equal to or higher than a specified value (step 32), and the temperature of the water storage tank 4 is specified. If the value is equal to or more than the value, the solenoid valve 21 is opened for a predetermined time and the cold water in the water storage tank 4 is discharged through the drain pipe 20 (step 33).

Next, the solenoid valve 14 is opened to start water supply from the water supply pipe 12 (step 34). Then, the water storage tank 4 determines whether or not the water level is equal to or higher than the specified water level (step 35), and if the water level is equal to or lower than the specified water level, the process returns to step 34.

When it is determined in step 35 that the water storage tank 4 is at or above the prescribed water level, it is again detected whether or not the temperature of the water storage tank 4 is at or above a predetermined value (step 36), and the water storage tank 4 is detected. If the temperature is above the specified value, the heater 6 is operated and the heating operation is started (step 37).

On the other hand, if it is determined in step 36 that the temperature is not higher than the specified temperature, an alarm is issued (step 38), it is determined whether or not to reset (step 39), and if not reset, the process proceeds to step 37. If you proceed and reset, return to step 32 and start heating operation when it is close to room temperature, but if you do not reset it will automatically start heating operation, but unlike when cooling, There is no effect, so you may start heating immediately.

According to the above-described embodiment, at each switching, when the temperature is equal to or higher than the specified temperature, cooling is not performed, and when the temperature is equal to or lower than the specified temperature, heating is not performed, that is, cold water is boiled or hot water is cooled. Since it does not occur, it can be used efficiently when switching between the heater 6 and the cooling device 25.

Further, since the cooling device 25 is not operated in a high temperature state, it is possible to prevent the cooling device 25 from being used at a high temperature.

Further, since the same water storage tank 4 is used for both heating and cooling, it is possible to prevent water not used for a long time from being stored in the water storage tank 4 and to keep it in a limited space. The amount of water storage can be increased.

On the other hand, the switching timing or time may be set in advance and the switching operation may be automatically performed.

[0039]

[Effect of device]

 The hot and cold water dispenser of the present invention switches from cooling to heating, and when heating the contents, when the temperature detected by the temperature sensor is below a predetermined value, the discharge control means is used. After the contents are discharged, the supply control means supplies the contents to heat them and switches from heating to cooling.When cooling the contents, the temperature detected by the temperature sensor is controlled by the control means. If the value is greater than the specified value, the contents are discharged by the discharge control unit, then the contents are supplied by the supply control unit, and the temperature is approached to room temperature before the operation starts. It is possible to prevent the efficiency from being greatly reduced.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a configuration of an embodiment of a water heater of the present invention.

FIG. 2 is a plan view of the same water storage tank.

FIG. 3 is a flowchart showing an operation when changing from heating to cooling of the water heater / chiller.

FIG. 4 is a flowchart showing an operation when changing from cooling to warming of the water heater / cooler.

FIG. 5 is a flow chart showing a basic operation of the same water heater.

FIG. 6 is a timing chart showing the operations of the compressor and the fan.

[Explanation of symbols]

 4 Water Storage Tank 6 Heater as Heating Device 9 Heating Temperature Sensor 10 Cooling Temperature Sensor 13, 14 Solenoid Valve as Supply Control Means 21 Solenoid Valve as Discharge Control Means 25 Cooling Device

Claims (1)

[Scope of utility model registration request] 1. A water storage tank having a cooling and heating device for storing and cooling and heating the contents by this selection, a supply control means for supplying the contents to the water storage tank, and a storage tank for the water storage tank. A discharge control means for discharging the contents, a temperature sensor for detecting the temperature of the water storage tank, and a temperature detected by the temperature sensor when the contents are heated by switching from cooling to heating. When the value is less than the value, after the content is discharged by the discharge control means, the content is supplied and heated by the supply control means, the heating is switched to the cooling, and the content is cooled. In this case, when the temperature detected by the temperature sensor is equal to or higher than a predetermined value, the discharge control means discharges the content, and then the supply control means supplies the content to cool it. Means equipped with Hot and cold water dispenser to the butterflies.