JP2009052760A - Storage water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a storage water heater capable of improving safety in use by notifying an user of inflow of high-temperature hot water into a bathtub in a hot water supplying operation. <P>SOLUTION: This storage water heater comprises a hot water storage tank 2, the bathtub 4 and a bath heat exchanger 3 performing reheating by heating the hot water in the bathtub 4 by hot water of high temperature in the hot water storage tank 2. An additional hot water supplying operation for supplying the hot water from a hot water supply portion to the bathtub, and a reheating operation for heating the hot water in the bathtub 4 by the bath heat exchanger 3 are combined, and the hot water supplying operation is performed to reach the target amount of hot water and target hot water temperature in the bathtub 4. A high-temperature warning signal is generated when a temperature of the hot water supplied from the hot water supply portion to the bathtub 4 is higher than a prescribed temperature. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a hot water storage type water heater.

A hot water storage type water heater provided with a hot water storage tank for storing high-temperature hot water heated by a heat pump heating source, a bathtub, and a heat exchanger for a bathtub for performing reheating of the bathtub (warming) is known (for example, (See Patent Documents 1 and 2). In this type of hot water storage type hot water heater, operations such as hot water in a bathtub, reheating, hot water and heat insulation are performed.
JP 2003-106672 A JP 2005-106440 A

  By the way, in the conventional hot water storage type hot water heater described above, when hot water such as hot water is poured into the bathtub, a message to that effect is displayed in advance on the remote control or a sound is transmitted from the remote control. In order to ensure safety, we have announced this.

  However, the fact is that there is no notification to that effect during hot water operation to the bathtub. This is because hot water operation has traditionally been performed by supplying hot water adjusted to an appropriate temperature in an empty tub without hot water remaining in the bathtub. This is because it was not assumed that would flow into the bathtub.

  However, in recent years when the need to improve energy efficiency in hot water storage hot water heaters has become extremely high, there has been a noticeable movement to effectively use the energy of the remaining hot water in the bathtub. . For this reason, hot water operation is generally performed in which high-temperature hot water is introduced into a bathtub in which residual hot water remains, mixed with the residual hot water, and heated with a heat exchanger for bath.

  The present invention has been made to solve the above-described conventional drawbacks, and its purpose is to notify the user when hot water flows into the bathtub during hot water operation. Thus, an object of the present invention is to provide a hot water storage type water heater capable of improving the safety in use.

  Accordingly, the hot water storage type water heater of claim 1 includes a hot water storage tank 2, a bathtub 4, and a bath heat exchanger 3 that heats the hot water in the bathtub 4 with the hot water in the hot water storage tank 2 and reheats it. Equipped with an additional pouring operation for supplying hot water from the hot water supply section to the bathtub and a reheating operation for heating the hot water in the bathtub 4 with the bath heat exchanger 3, A hot water storage type water heater that performs hot water operation so as to reach a target hot water temperature, and is characterized in that a high temperature warning signal is issued when the hot water temperature supplied from the hot water supply unit to the bathtub 4 is equal to or higher than a predetermined temperature. Yes.

  The hot water storage type water heater according to claim 2 calculates the hot water temperature and the amount of hot water supplied from the hot water supply unit to the bathtub 4 based on the remaining hot water amount and the remaining hot water temperature in the bathtub 4 and is necessary. The high temperature warning signal is configured to calculate a reheating time, and the high temperature warning signal is characterized by generating a high temperature warning signal when the calculated hot water temperature of the supplied hot water is equal to or higher than a predetermined temperature.

  The hot water storage type water heater according to claim 3 is characterized in that a temperature sensor 24 is arranged in the hot water supply section, and a high temperature warning signal is issued when the temperature of the hot water detected by the temperature sensor 24 is equal to or higher than a predetermined temperature. Yes.

  The hot water storage type water heater according to claim 4 is characterized in that the high temperature warning is displayed visually and / or by sound on the bath remote controller R by the output of the high temperature warning signal.

  In the hot water storage type hot water supply apparatus according to claim 5, the hot water supply unit adds hot water to be supplied into the bathtub 4 by mixing high temperature water supplied from the hot water storage tank 2 and water supplied from the outside. It is characterized by adjusting to the pouring temperature.

  In the hot water storage type hot water supply apparatus according to the first to fifth aspects, when high-temperature hot water is supplied into the bathtub 4, the fact of the user is notified, so safety in use can be ensured. In this case, since the temperature sensor is unnecessary if configured as in claim 2, the configuration can be simplified, and if the temperature sensor 24 is used as in claim 3, the certainty of control is improved. In particular, as shown in claim 4, if the display is made on the remote controller R for bath, the safety is further improved. Moreover, if comprised like Claim 5, since adjustment to an additional pouring temperature can be performed reliably, the hot water of the target temperature and target temperature can be reliably ensured in the bathtub 4. FIG.

  Next, specific embodiments of the hot water storage type water heater of the present invention will be described in detail with reference to the drawings. FIG. 1 is a configuration diagram showing an embodiment of a hot water storage type water heater of the present invention. As shown in the figure, the hot water storage type hot water heater includes a heat pump unit 1 as an example of a heating unit, a hot water storage tank 2 for storing hot water heated by the heat pump unit 1, and hot water supplied from the hot water storage tank 2. A reheating bath heat exchanger 3 for exchanging heat with hot water in the bathtub 4 and a control device 10 are provided.

  One end of the pipe 31 is connected to the input side of the heat pump unit 1, and the other end of the pipe 31 is connected to the lower side of the hot water storage tank 2. On the other hand, one end of the pipe 32 is connected to the output side of the heat pump unit 1, and the other end of the pipe 32 is connected to the upper side of the hot water storage tank 2. A pump 11 is provided in the pipe 31, and hot water (or water) in the hot water storage tank 2 is circulated through the pipe 31, the heat pump unit 1, and the pipe 32 by the pump 11.

  A water supply pipe 33 is connected to the lower side of the hot water storage tank 2, and one end of the water supply pipe 34 is connected to the water supply pipe 33. The other end of the water supply pipe 34 is connected to one input of the mixing valve 25, and the other input of the mixing valve 25 is connected to the upper side of the hot water storage tank 2 via the hot water supply pipe 35.

  The upper side of the hot water storage tank 2 and the primary side and upper side of the bath heat exchanger 3 are connected via a pipe 36, and the lower side of the hot water storage tank 2 and the primary side and lower side of the bath heat exchanger 3 are connected to each other. Are connected via a pipe 37. The pump 12 is provided in the pipe 37, and the hot water in the hot water storage tank 2 is circulated by the pump 12 through the pipe 36, the bath heat exchanger 3, and the pipe 37.

  Further, the secondary side and lower side of the bath heat exchanger 3 and the circulation port 20 of the bathtub 4 are connected via a pipe 38, and the secondary side and upper side of the bath heat exchanger 3 and the circulation of the bathtub 4 are connected. The port 20 is connected via a pipe 38. A pump 13 is provided in the pipe 38, and hot water in the bathtub 4 is circulated by the pump 13 through the pipe 38, the bath heat exchanger 3, and the pipe 39. Hot water in the bathtub 4 circulates through the secondary side of the bath heat exchanger 3, whereby the hot water in the bathtub 4 is heated by heat exchange with the hot water supplied from the hot water storage tank 2.

  The pipe 38 is provided with a water level sensor 21 as an example of a hot water amount sensor for detecting the water level in the bathtub 4 and a temperature sensor 22 for detecting the hot water temperature in the bathtub 4.

  One end of the hot water supply pipe 40 is connected to the outlet of the mixing valve 25, and the other end of the hot water supply pipe 40 is connected to the pipe 39. The hot water supply pipe 40 is provided with a flow sensor 23 for detecting the amount of hot water and a temperature sensor 24 for detecting the temperature of the hot water. The water supply pipes 33 and 34, the mixing valve 25, and the hot water supply pipes 35 and 40 constitute a hot water supply unit. The hot water in the hot water storage tank 2 is pushed up by the water supplied from the water supply pipe 33, and the high-temperature water in the upper part of the hot water storage tank 2 is pushed out from the hot water supply pipe 35 to supply hot water.

  Although not shown, the heat pump unit 1 includes a refrigerant circuit in which a compressor, a condenser (water heater), an expansion unit, and an evaporator are connected in an annular shape, and the pump 11 uses heat generated by the condenser. Heat the circulated hot water. In this embodiment, the temperature of the high-temperature water supplied to the upper part in the hot water storage tank 2 by the heat pump unit 1 is set to 80 ° C.

  The control device 10 includes a microcomputer and an input / output circuit. Based on detection signals from the water level sensor 21, temperature sensor 22, flow rate sensor 23, and temperature sensor 24, the heat pump unit 1, the pump 11, the mixing valve 25, and the like. To control. Further, the control device 10 adds an additional pouring amount for making the target hot water amount in the additional pouring operation based on the water level (corresponding to the remaining hot water amount) detected by the water level sensor 21 which is a hot water amount sensor and the target hot water amount. (A target hot water amount−the remaining hot water amount)) An additional pouring amount calculation unit 10a, an additional pouring amount calculated by the additional pouring amount calculation unit 10a, and a temperature of hot water supplied from the hot water supply unit in the additional pouring operation The additional pouring temperature, the amount of remaining hot water detected by the hot water sensor, the hot water temperature of the remaining hot water detected by the temperature sensor, and the target hot water temperature in the bathtub 4 at the end of hot water filling A reheating heat amount calculation unit 10b for calculating the reheating heat amount and a reheating operation for heating the hot water in the bathtub 4 after the additional pouring operation based on the reheating heat amount calculated by the reheating heat amount calculation unit 10b. To determine And a reheating operation determination unit 10c.

  FIG. 2 shows a flowchart for explaining the operation of the control device 10 of the hot water storage type hot water heater, and the operation of the hot water treatment of the control device 10 will be described below with reference to FIG.

  First, when it is determined in step S1 that there is remaining hot water, the process proceeds to step S2. On the other hand, if it is determined that there is no remaining hot water, the process proceeds to step S10, a normal hot water operation is performed, and the process ends. Here, the control device 10 determines the presence or absence of remaining hot water in the bathtub 4 based on the water level in the bathtub 4 detected by the water level sensor 21. Further, in the normal hot water operation, the control valve 10 is controlled by the control device 10 to mix the hot water in the hot water storage tank 2 and the water from the water supply pipe 34 so that the hot water at the target hot water is in the bathtub 4 by the target hot water amount. Hot water supply.

  Next, in step S2, the amount and temperature of the remaining hot water are detected. Here, the control device 10 estimates the amount of hot water in the bathtub 4 based on the water level in the bathtub 4 detected by the water level sensor 21. That is, since the horizontal cross-sectional shape in the bathtub 4 differs depending on the water level, the amount of hot water corresponding to the water level is measured (or calculated) in advance, and the amount of hot water in the bathtub 4 is estimated using the measured data (or calculated data). It is. The temperature of the remaining hot water in the bathtub 4 is determined by operating the pump 13 for a predetermined time to circulate the remaining hot water in the bathtub 4 through the pipe 38, the bath heat exchanger 3, and the pipe 39. To detect.

  Next, it progresses to step S3 and calculates the additional pouring amount and the additional pouring temperature. Here, the additional pouring amount is calculated based on the remaining hot water amount and the target hot water amount detected in step S2 by the additional pouring amount calculation unit 10a. Further, the additional pouring temperature is set so that the hot water temperature in the bathtub 4 becomes the target hot water temperature as much as possible after the additional pouring operation, but the upper limit temperature is set to 60 ° C. for safety.

  In the next step S4, it is determined whether or not the additional pouring temperature is 50 ° C. or higher. If the temperature is lower than 50 ° C., the additional pouring operation is performed as it is in step S5. When the temperature is higher than 50 ° C., in step S6, a high temperature warning signal is output to the remote controller, and then the process proceeds to step S5 to perform an additional pouring operation.

  In the additional pouring operation, the control device 10 controls the mixing valve 25 to mix the hot water in the hot water storage tank 2 and the water from the water supply pipe L14 to generate hot water at the additional pouring temperature, and the generated additional pouring water Hot water of temperature is supplied into the bathtub 4 through the hot water supply pipe 40 and the pipe 39. At this time, based on the flow rate detected by the flow rate sensor 23, the mixed hot water is supplied into the bathtub 4 by the amount of additional pouring.

  Next, it progresses to step S7, the additional pouring amount and additional pouring temperature which were calculated by the additional pouring amount calculation part 10a in step S3, the hot water amount and hot water temperature of the remaining hot water detected by step S2, and the inside of the bathtub 4 Based on the target hot water temperature, the reheating heat amount calculation unit 10b calculates the reheating heat amount.

  Next, the process proceeds to step S8, and if it is determined that the reheating operation is necessary, the process proceeds to step S9. Here, based on the amount of reheating heat calculated in step S7, the reheating operation determining unit 10c determines whether or not a reheating operation for heating the remaining hot water in the bathtub 4 after the additional pouring operation is necessary. In step S9, a chasing operation is performed, and this process ends.

  Here, in the reheating operation, hot water in the bathtub 4 is circulated by the pump 13 through the heat exchanger 3 for bath, and hot water in the hot water storage tank 2 and hot water in the bathtub 4 are heated by the bath heat exchanger 3. By exchanging heat, the remaining hot water in the bathtub 4 is reheated by the reheating heat amount calculated by the reheating heat amount calculation unit 10b in step S7.

  On the other hand, if it is determined in step S8 that the reheating operation is not necessary, step S9 is skipped and this process is terminated.

  In the above flow chart, if the additional pouring temperature is a high temperature of 50 ° C. or higher, a high temperature warning signal is output to the remote control in step S6, and the display state of the bath remote control R at that time is shown in FIG. Yes. That is, (a) a state before the start of hot water beam, (b) a state where hot water beam is started, (c) a state where hot water beam is in progress and a high temperature warning signal is output to give a “high temperature warning”, ( d) The completed state of hot water is displayed in order. On the other hand, in the case where the high temperature warning signal is not output in step S4, after the display of (a) and (b) is performed in the same manner as described above, the display indicating that hot water is being poured as shown in FIG. After that, the state moves to the state (d) and returns to the normal display.

  In the bath remote controller R, a warning is given by letters, but this may be given by using other symbols, or alternatively, or together with these, by voice or other sounds. A warning may be given.

  Moreover, in the said embodiment, although it is made to output a high temperature warning signal based on the calculation result of the additional pouring temperature in step S3 in step S4 of a flowchart, it is the temperature sensor 24 attached to the hot water supply piping 40. A high temperature warning signal may be output based on the detected temperature. Further, a high temperature warning signal may be output based on both the calculation result in step S3 and the temperature detected by the temperature sensor 24.

1 is an overall circuit diagram of an embodiment of a hot water storage type water heater of the present invention. It is a flowchart figure explaining the control system in the said embodiment. It is explanatory drawing which shows the operation state of the remote control for baths used in the said embodiment over time.

Explanation of symbols

  2. Hot water storage tank, 3 ... Heat exchanger for bath, 24 ... Temperature sensor, R ... Remote control for bath

Claims (5)

  A hot water storage tank (2), a bathtub (4), and a bath heat exchanger (3) that heats the hot water in the bathtub (4) with hot water in the hot water storage tank (2) and reheats it, Using the hot water supply section to add hot water to the bathtub and the hot water supply in the bathtub (4) with the bath heat exchanger (3), and the target in the bathtub (4) A hot water storage type water heater that performs hot water operation so as to achieve a target hot water temperature with a hot water amount, and a high temperature warning signal when the hot water temperature supplied from the hot water supply unit to the bathtub (4) is equal to or higher than a predetermined temperature Hot water storage type water heater that emits water.   Based on the amount of remaining hot water and the remaining hot water temperature in the bathtub (4), the hot water temperature and the amount of hot water supplied from the hot water supply unit to the bathtub (4) are calculated, and the required reheating time is calculated. 2. The hot water storage hot water supply according to claim 1, wherein the high temperature warning signal is generated when the calculated hot water temperature of the supplied hot water is equal to or higher than a predetermined temperature.   The hot water storage device according to claim 1, wherein a temperature sensor (24) is disposed in the hot water supply section, and a high temperature warning signal is issued when the temperature of the hot water detected by the temperature sensor (24) is equal to or higher than a predetermined temperature. Type water heater.   The hot water storage type hot water heater according to any one of claims 1 to 3, wherein the high temperature warning is displayed visually and / or by sound on the remote controller R for bath by the output of the high temperature warning signal.   The hot water supply unit adjusts the hot water supplied into the bathtub (4) to an additional pouring temperature by mixing hot water supplied from the hot water storage tank (2) and water supplied from outside. The hot water storage type hot water supply device according to any one of claims 1 to 4, wherein the hot water storage type water heater is one.