JP2014001891A - Hot water dispensation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot water dispensation system for improving comfort in use by eliminating a gap between a preset hot water dispensation temperature and an actual hot water pouring temperature by networking a hot-water heater and faucets.SOLUTION: On a stage where a user opens any faucet, whether it is single use of a thermo-faucet 3 or not is determined. When a corresponding condition is satisfied, thermo-faucet setting temperature (Tx) information is acquired from a temperature setting value detection sensor S7 of the thermo-faucet 3, and set to Tt=Tx+10deg(ΔTt1) as a temporary setting temperature (hot-water heater outlet temperature) Tt. Thereafter, hot water dispensation is continued at the changed hot water pouring temperature until the end of use of the thermo-faucet 3. In the end of use of the thermo-faucet 3, the set hot water dispensation temperature is returned to the original standard temperature (e.g., 42°C).

Description

  The present invention relates to a hot water supply system, and more particularly, to a hot water supply system that improves the use comfort by eliminating the difference between the hot water set temperature and the actual hot water temperature from the water tap by networking the water heater and each faucet.

  2. Description of the Related Art Conventionally, in a hot water supply system that supplies hot water by connecting a water heater and one or a plurality of water faucets with a pipe, it is common to set a hot water supply temperature with a remote controller disposed in a kitchen, bathroom, or the like. In general, the hot water supply temperature cannot be freely set at the end faucet, and especially in the case where the pipe length is long in winter, the difference between the set temperature and the actual hot water temperature has been a problem.

  The technique of patent document 1 is proposed as what enables desired hot water temperature to be discharged with the water tap of a terminal. As shown in FIG. 6, the hot water supply system 100 according to this technique includes remote controllers 103 a to 103 c in the vicinity of the water taps 102 a to 102 c, respectively, and a deviation value with respect to the hot water supply set temperature according to the pipe length from the water heater 101. And the hot water supply set temperature is changed in the control unit 104 in accordance with the deviation value when the corresponding faucet is opened. According to this technique, it is possible to set a hot water supply temperature that compensates for heat radiation for a plurality of faucets with different pipe lengths.

JP 2009-133510 A

However, in the technique of this document, since it is necessary to install a remote controller for each faucet, there is a problem in that the cost is increased and the spread of the water heater system is hindered.
Also, since the water temperature changes throughout the year, it is necessary to review the deviation value for each season.
As another problem, in a hot water supply system including a thermo-mixing faucet (hereinafter referred to as a thermo faucet), the remote control side has a desired temperature on the faucet side in order to ensure the flexibility of the hot water temperature setting on the thermo faucet side. It is recommended that the set temperature is increased to a certain level (about 10 degrees).
According to this standard, in the case of a hot water supply system in which a thermo faucet and a normal faucet coexist, there is a problem that adjustment of the hot water temperature when using the normal faucet becomes complicated and the comfort of use is impaired. Since this problem occurs regardless of the pipe length, it cannot be dealt with by the technique of the same document.

The present invention is for solving such problems, and provides a hot water supply system control technology that eliminates the difference between the hot water supply set temperature and the actual tap water temperature and ensures the improvement of user comfort. It is to provide.
The gist of the present invention is as follows. That is, the hot water supply system according to the present invention is:

(1) In a hot water supply system including a hot water heater that supplies hot water at a preset hot water supply set temperature (Ts) and one or more faucets that receive hot water supply from the hot water heater via a pipe,
Faucet hot water detection means for detecting hot water from each faucet,
If the predetermined condition is met, means for enabling supply of hot water at a provisional set temperature (Tt) different from the hot water supply set temperature (Ts);
Is further provided.

(2) In the above-mentioned invention, there is provided a means for enabling a user to select whether or not hot water is supplied at the provisional set temperature (Tt).

(3) In each of the above inventions, at least one or more of the faucets is a thermo-mixing faucet (hereinafter referred to as a thermo faucet) that can arbitrarily set a tapping temperature.
The predetermined condition is a case where only a thermo faucet is detected, and
The temporary set temperature (Tt) is a temperature obtained by raising a predetermined temperature (ΔTt1) from the hot water supply set temperature (Ts).

(4) In the inventions of the above (1) and (2), the predetermined condition is to maintain the experience when using hot water in a certain range regardless of the outside air temperature (To), the outside air temperature (To), the hot water supply set temperature. (Ts) and a condition determined as a combination of a temperature difference (ΔT = Ts−To) between the hot water supply set temperature (Ts) and the outside air temperature (To).

According to the above inventions, there is no difference between the hot water supply set temperature of the remote controller or the like and the faucet hot water temperature.
In addition, according to the invention of (3), since it is controlled to the recommended water heater outlet temperature when using the thermo faucet regardless of the hot water set temperature, the degree of freedom of the hot water temperature setting on the thermo faucet side is ensured. There is an effect that can be.

  Moreover, according to the invention of (4), there exists an effect that the user's sensible temperature at the time of hot water use use can be maintained in a fixed range throughout the year. In addition, usually in summer, the set temperature is lowered, which contributes to energy saving.

It is a figure showing the whole hot-water supply system 1 composition concerning a first embodiment. It is a figure which shows the hot water supply control flow of 1st embodiment. It is a figure which shows the whole structure of the hot water supply system 20 which concerns on 2nd embodiment. It is a figure which shows a response | compatibility with the temperature conditions of Table 1, and preset temperature conditions. It is a figure which shows the hot water supply control flow of 2nd embodiment. It is a figure which shows the structure of the conventional hot water supply system.

  Hereinafter, an embodiment of a hot water supply system according to the present invention will be described in more detail with reference to FIGS. In addition, in order to avoid duplication, in each figure, the same structure is shown using the same code | symbol. Needless to say, the scope of the present invention is described in the claims and is not limited to the following embodiments.

(First embodiment)
This embodiment concerns the form which ensures the hot water temperature setting freedom degree of a thermo faucet by raising the hot-water supply hot-water temperature at the time of single use of a thermo faucet.
Referring to FIG. 1, a hot water supply system 1 includes a hot water heater 2, a water supply pipe W <b> 2 that branches off at a branch portion P <b> 1 of the water supply pipe W <b> 1, and supplies hot water to the water heater 2. Water taps 3, 4, and 5 are provided on the terminal side branched from the hot water supply pipe H1, the water supply pipe W1, and the hot water supply pipe H1 for supply. Of these, the faucet 3 is a thermo faucet, the faucet 4 is a mixed faucet without a thermo function, and the faucet 5 is a single faucet that only discharges hot water. The thermo faucet 3 is provided with a temperature setting knob 3a so that hot water having a desired temperature can be discharged regardless of the temperature of the hot water from the water heater.

The water heater 2 includes a burner 2b and a heat exchanger 2c inside the housing 2a. The water supply pipe W2 is connected to the internal pipe W2 ′, and further connected to the inlet side of the heat exchanger 2c. Further, the outlet side of the heat exchanger 2c is connected to the hot water supply pipe H1 via the internal pipe H1 ′. A bypass pipe W2 ″ is provided between the water supply pipe W2 ′ and the hot water supply pipe H1 ′ so that the water supply bypasses the heat exchanger 2c. A flow rate control valve 2d is provided in the bypass pipe W2 ″ path. Is intervening.
A water amount sensor S1 and an incoming water temperature sensor S2 are interposed in the water supply pipe W2 ′ path. A hot water temperature sensor S3 is interposed in the pipe section H1 ′. Further, flow rate sensors S4 to S6 are respectively provided on the hot water supply pipe side of the faucets 3, 4, and 5 so that the hot water flow rate can be detected. Further, the thermo faucet 3 is provided with a temperature set value detection sensor S7. Based on the detection information of each sensor, the amount of hot water, hot water supply temperature, and flow rate, which will be described later, can be arbitrarily controlled by adjusting the opening degree of the flow control valve 2d and controlling the combustion amount of the burner 2b.

Next, the control system of the hot water supply system 1 is mounted in the hot water heater 2, the control unit 6 that controls the operation of the system and the hot water temperature control, the remote controller 6 b that performs setting of the hot water supply temperature described later, and the above-mentioned Each sensor S1 to S7 is configured. The control unit 6 includes a microcomputer, a storage unit, an I / F unit, etc. (all not shown) having a CPU, a ROM, a RAM, and the like as main components, and detection values sent from each sensor and the remote control 6b side. The actuator (each control valve or the like) is actuated on the basis of the above request to supply hot water as desired by the user.
The remote control 6b is provided with an “automatic mode” setting SW (not shown), and the hot water supply hot water temperature control described below is performed according to the selection of the “automatic mode” by the user.

The hot water supply system 1 is configured as described above. Next, a hot water supply hot water temperature control flow when the thermo faucet 3 is opened will be described with reference to FIG.
It is assumed that the hot water supply set temperature is set to a standard temperature (for example, 42 ° C.) in the initial state (S101). From this state, when the user opens one of the faucets (S102), it is determined whether or not the thermo faucet 3 is used alone (S103). When the condition is met (YES in S103), the thermo faucet set temperature (Tx) information is acquired from the temperature set value detection sensor S7 of the thermo faucet 3 (S104). Further, Tt = Tx + 10 deg (ΔTt1) is set as the provisional set temperature (water heater outlet temperature) Tt (S105). In S103, when NO, that is, when a faucet other than the thermo faucet 3 is used, hot water is supplied at an initial hot water supply set temperature Ts.

  Thereafter, until the end of use of the thermo faucet 3 (NO in S106), hot water supply is continued at the changed hot water temperature. When the use of the thermo faucet is terminated (YES in S106), the hot water supply set temperature is returned to the original standard temperature (for example, 42 ° C.) (S101). The above hot water control is repeatedly performed.

  In this embodiment, an example in which ΔTt1 = 10 deg is shown as the set temperature rise value when using the thermo faucet, but other set values can be used. Further, it may be variably configured according to the user's selection.

  Further, in the present embodiment, an example in which hot water is discharged at a temporary set temperature (Tt = Tx + ΔTt1) in consideration of the temperature setting value of the thermo faucet is shown, but instead of detecting the temperature setting value of the thermo faucet, a water heater It is also possible to adopt a mode in which a temporary set temperature (Tt = Ts + ΔTt1) obtained by raising a predetermined temperature from the set temperature Ts is used.

(Second embodiment)
Next, another embodiment of the present invention will be described. In the present embodiment, the hot water supply set temperature (Ts) is adjusted in accordance with the outside air temperature (To) condition and the like, and the temperature of the hot water at the time of hot water use is kept constant throughout the year.
Referring to FIG. 3, the configuration of the present embodiment is different from that of the first embodiment in that a temperature sensor S8 for detecting the outside air temperature To is further provided. Furthermore, the control unit 6 stores a provisional set temperature table (see Table 1) determined by the outside air temperature and the hot water supply set temperature. Since other configurations are the same as those of the first embodiment, a duplicate description is omitted.

The specific contents of the data table are as follows. The hot water supply set temperature is set as shown in Table 1 corresponding to each condition of the outside air temperature To, the set temperature Ts, and the temperature difference ΔT = Ts−To between the set temperature and the outside air temperature. The provisional set temperature Tt is different from the hot water supply set temperature Ts when the following two conditions are satisfied.
(A) Outside air temperature To ≧ 25 ° C. and set temperature Ts ≦ 50 ° C.
When this condition is met, the provisional set temperature Tt is lowered by 2 deg with respect to the set temperature Ts.
(B) Outside air temperature To <10 ° C., set temperature 50 ° C. ≧ Ts ≧ 38 ° C., and ΔT ≧ 35 deg.
When this condition is met, the provisional set temperature Tt is increased by 2 deg with respect to the set temperature Ts.
By providing such a provisional preset temperature, a constant body temperature can be maintained throughout the year. Each temperature zone A to F is illustrated in FIG. The shaded area is the temperature range to which the provisional set temperature is applied.

Next, a hot water supply set temperature control flow when the faucet 3 is opened in the present embodiment will be described with reference to FIG.
It is assumed that the hot water supply set temperature is set to a standard temperature (for example, 42 ° C.) in the initial state (S201). The control unit 6 always detects the outside air temperature (To) (S202). From this state, when the user opens one of the faucets (S203), it is determined whether or not the hot water temperature setting is set to the “automatic mode” (S204). When “automatic mode” is not set (NO in S204), set temperature Tt becomes the hot water temperature as it is.
If the “automatic mode” is set (YES in S204), it is determined based on the table of Table 1 whether the temperature condition corresponds to the provisional set temperature adjustment zone B or E (S205). .

  When it corresponds to the zone B, the flow rate control valve 2c is adjusted so that the outlet temperature of the water heater becomes the provisional set temperature Tt = Ts−2 deg (S207). In the case of the zone E, the flow control valve 2c is adjusted so that the provisional set temperature Tt = Ts + 2 deg (S208). In other zones, the hot water is discharged at the set temperature Tt (S206).

  Thereafter, until all the faucets have been used (NO in S209), the hot water supply is continued under the hot water temperature condition. When all the faucets have been used (YES in S209), the hot water supply set temperature is returned to the original standard temperature (for example, 42 ° C.) (S201). The above hot water control is repeatedly performed.

  The present invention is widely applicable to a water heater that supplies hot water via a hot water supply pipe regardless of an energy source or a heating method (instantaneous type, hot water storage type).

DESCRIPTION OF SYMBOLS 1, 20 ... Hot-water supply system 2 ... Hot-water heater 3 ... Thermo faucet 4, 5 ... Faucet 6 ... Control part 6b ... Remote control S1 ··· Water quantity sensor S2 ··· Incoming water temperature sensor S3 ··· Outlet temperature sensor S4 to S6 ··· Flow rate sensor S7 · · · Thermo temperature set value detection sensor S8 · · · Outside temperature sensor

Claims (4)

In a hot water supply system provided with a hot water supply device that supplies hot water at a preset hot water supply set temperature (Ts) and one or more faucets that receive hot water supply from a hot water supply device via a pipe,
Faucet hot water detection means for detecting hot water from each faucet,
If the predetermined condition is met, means for enabling supply of hot water at a provisional set temperature (Tt) different from the hot water supply set temperature (Ts);
A hot water supply system characterized by further comprising:   The hot water heater according to claim 1, further comprising means for allowing a user to select whether or not hot water is supplied at the temporary set temperature (Tt). At least one or more of the faucets is a thermo-mixing faucet (hereinafter referred to as a thermo faucet) that can arbitrarily set the hot water temperature,
The predetermined condition is a case where only a thermo faucet is detected, and
The temporary set temperature (Tt) is a temperature that is a predetermined temperature (ΔTt1) higher than the thermo faucet set temperature (Tx).
The water heater according to claim 1 or 2, characterized in that.   The predetermined condition is to maintain the sensation when using hot water supply within a certain range regardless of the outside air temperature (To), the outside air temperature (To), the hot water supply set temperature (Ts), the hot water supply set temperature (Ts), and the outside air temperature (To). And the temperature difference (ΔT = Ts−To) and the water heater according to claim 1 or 2.

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