KR101560511B1 - Warm water heating system, control device and control method - Google Patents

Abstract

The control device according to the present invention controls the opening of the three-way valve so that the temperature of the water on the upstream side of the heating portion increases by a predetermined temperature until the temperature of the water on the upstream side of the heating portion reaches the target temperature after the heat pump is operated, Fig. Alternatively, the control device controls the opening degree of the vane so that the temperature of the water on the downstream side of the heating section is increased by the predetermined temperature until the temperature of the water on the downstream side of the heating section reaches the target temperature after the heat pump is activated do.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating water heating system,

The present invention relates to a hot water heating system for heating hot water using a heat output heat exchanger provided in a heat pump, and a control device and a control method for the hot water heating system.

Priority is claimed on Japanese Patent Application No. 2011-248030, filed on November 11, 2011, the entire contents of which are incorporated herein by reference.

Generally, a hot water system for supplying hot water has a low-temperature tank. In the hot water system, a part of the water stored in the low-temperature tank is subjected to temperature control by obtaining heat from the heat output heat exchanger provided in the hot water heat pump main body (see, for example, Patent Document 1).

However, the invention described in Patent Document 1 has a problem that installation cost and installation space are increased because a low-temperature tank is installed in a hot water system. In addition, since the water collected in the low-temperature tank is circulated in the high-temperature output heat exchanger to raise the water temperature in the low-temperature tank, there is a problem that it takes time to raise the temperature.

Therefore, in Patent Document 2, a three-way valve is provided in the hot water system, a part of the output of the hot water from the hot output heat exchanger is circulated to the hot output heat exchanger, and the temperature of the inlet of the hot output heat exchanger is adjusted to a predetermined target temperature A method of controlling the above-described method is described. By using this method, the heating rate of the hot water system can be increased.

Japanese Patent Application Laid-Open No. 2002-340400 Japanese Patent Application Laid-Open No. 11-185477

However, in the case of using the method described in Patent Document 2, when the hot water system is in a transient state, such as when the heat pump is started, that is, when the water temperature of the entire hot water system is lower than the target temperature, There is a possibility that the output of all hot water from the hot output heat exchanger may circulate. In this case, the water temperature of the hot water system rises rapidly, and when the temperature of the inlet of the heat output heat exchanger reaches the target temperature, the opening degree of the three-way valve changes for the first time. However, since the opening and closing of the three-way valve is not switched instantaneously, the opening and closing operation of the three-way valve can not follow the temperature change of the hot water, and the possibility that the water temperature at the inlet of the heat output heat exchanger exceeds the target temperature have. In this case, the amount of heat exchanged in the heat output heat exchanger of the heat pump is reduced, and the efficiency of the hot water heating system is deteriorated.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hot water heating system, a control device, and a control method for appropriately controlling a temperature raising rate in a transient state of a hot water system.

The present invention relates to a heat pump comprising a heat pump having a heat output heat exchanger for outputting heat from a heat source system, a heating unit for heating water by heat obtained from the heat output heat exchanger, A circulation unit for circulating the water heated by the heating unit to the upstream side of the heating unit; an inflow unit for allowing water to flow from the heating target to the upstream side of the heating unit; An upstream-side target temperature setting section for setting a target temperature of water on the upstream side of the heating section; and an upstream-side target temperature setting section for setting a target temperature of water on the upstream side of the heating section, The temperature of the water on the upstream side of the heating unit rises by a predetermined temperature until the temperature of the water reaches the target temperature An adjustment amount determining section for determining an adjustment amount of the flow amount distribution by the adjustment section.

In the present invention, it is preferable that the adjustment amount determining section determines that the water circulated in the heating section, the water circulated by the circulation section, and the water circulated in the circulation section, until the temperature of water on the upstream side of the heating section reaches the target temperature It is preferable that the adjustment amount of the flow distribution by the adjustment section is determined so that the temperature of the water on the upstream side of the heating section increases by a predetermined temperature calculated based on the state of the water flowing from the inflow section to the upstream side of the heating section .

In the present invention, based on the state of the water circulating in the heating section, the water circulated by the circulation section, and the water flowing from the inlet section to the upstream side of the heating section, As the adjustment temperature used for determination of the adjustment amount, the temperature of the difference between the temperature of the water flowing into the upstream side and the temperature of the water mixed with the water circulated by the circulation section and the temperature of the water circulating in the heating section Wherein the adjustment amount determining section determines the temperature of the water upstream of the heating section by the adjustment temperature calculated by the adjustment temperature calculating section until the temperature of the water on the upstream side of the heating section reaches the target temperature It is preferable to determine the adjustment amount of the flow distribution by the adjustment unit.

In the present invention, it is preferable that the adjustment amount determining section determines the adjustment amount of the flow amount distribution by the adjustment section so that the temperature of the water flowing into the heating section becomes constant until the heat pump is operated.

Further, in the present invention, the upstream-side target temperature setting unit may set the upstream-side target temperature to a predetermined value based on the maximum heating amount in the heating unit, the flow rate of the water flowing into the heating unit and the target temperature of water on the downstream side of the heating unit It is preferable to set the target temperature of the water on the upstream side.

A downstream-side target temperature setting unit for setting a target temperature of water on the downstream side of the heating unit; and a downstream-side target temperature setting unit for setting a temperature of the water on the downstream side of the heating unit by a predetermined temperature until the temperature of the water reaches the target temperature. And a heat pump adjustment amount determining unit for determining an adjustment amount of the heat pump control so that the temperature of the water on the downstream side of the heating unit is increased.

In the present invention, it is preferable that the heat pump adjustment amount determining section is configured to determine whether the temperature of the water on the downstream side of the heating section is flowing to the heating section until the temperature of the water reaches the target temperature, It is preferable to determine the adjustment amount of the heat pump control so that the temperature of the water on the downstream side of the heating unit is increased by a predetermined temperature calculated based on the state of the water to be heated and the heating amount in the heating unit.

Further, in the present invention, it is preferable that, based on the state of the water flowing into the heating section, the state of the water flowing into the adjustment section from the heating section, and the heating amount of the heating section, A heat pump adjusting means for calculating a temperature of a difference between a temperature of the water heated by the heating portion and a temperature of the water flowing into the adjusting portion from the heating portion as a heat pump adjusting temperature used for determining an adjustment amount of the heat pump control Wherein the heat pump adjustment amount determining section determines the heat pump adjustment amount based on the heat pump adjustment temperature calculated by the heat pump adjustment temperature calculating section until the temperature of the water on the downstream side of the heating section reaches the target temperature It is preferable to determine the adjustment amount of the heat pump control so that the temperature of the water on the downstream side increases.

According to another aspect of the present invention, there is provided a heat pump comprising: a heat pump having a heat output heat exchanger for outputting heat from a heat source system; a heating unit for heating water by heat obtained from the heat output heat exchanger; A circulation unit for circulating the water heated by the heating unit to the upstream side of the heating unit and an inflow unit for introducing water from the heating object to the upstream side of the heating unit, A downstream target temperature setting unit for setting a target temperature of water on the downstream side of the heating unit; and a control unit for controlling the temperature of the water in the heating unit to a predetermined temperature until the temperature of water on the downstream side of the heating unit reaches the target temperature. And a heat pump adjustment amount determining section that determines an adjustment amount of the heat pump control so that the temperature of the water on the downstream side increases.

In the present invention, it is preferable that the heat pump adjustment amount determining section determines the state of the water flowing into the heating section and the water flowing out of the heating section until the temperature of the water on the downstream side of the heating section reaches the target temperature It is preferable to determine the adjustment amount of the heat pump control so that the temperature of the water on the downstream side of the heating section increases by a predetermined temperature calculated based on the heating amount in the heating section.

Further, in the present invention, the water circulated in the heating section is supplied to the heating section based on the state of the water circulating in the heating section and the water flowing out of the heating section and the heating amount in the heating section And a heat pump adjustment temperature calculation unit that calculates a temperature of a difference between a temperature of the water when heated by the heating unit and a temperature of water flowing out of the heating unit as a heat pump adjustment temperature used for determining an adjustment amount of the heat pump control, The heat pump adjustment amount determining section determines the temperature of the water downstream of the heating section by the heat pump adjustment temperature calculated by the heat pump adjustment temperature calculating section until the temperature of water on the downstream side of the heating section reaches the target temperature It is preferable to determine the adjustment amount of the heat pump control.

According to another aspect of the present invention, there is provided a heat pump comprising: a heat pump having a heat output heat exchanger for outputting heat from a heat source system; a heating unit for heating water by heat obtained from the heat output heat exchanger; A circulation part for circulating the water heated by the heating part to the upstream side of the heating part; an inflow part for allowing water to flow from the heating object to the upstream side of the heating part; And an adjustment unit for adjusting a flow rate distribution of water to the outflow unit, and the control device.

According to another aspect of the present invention, there is provided a heat pump comprising: a heat pump having a heat output heat exchanger for outputting heat from a heat source system; a heating unit for heating water by heat obtained from the heat output heat exchanger; A circulation part for circulating the water heated by the heating part to the upstream side of the heating part; an inflow part for allowing water to flow from the heating object to the upstream side of the heating part; A control unit for controlling an amount of adjustment of an adjustment unit of the hot water heating system including an adjustment unit for adjusting a flow rate distribution of water to the outflow unit and determining a target temperature of water on the upstream side of the heating unit; The temperature of the water on the upstream side of the heating section is lowered by a predetermined temperature until the temperature of the water on the side of the heating section reaches the target temperature And a step of determining an adjustment amount of the flow distribution by the adjustment unit.

According to another aspect of the present invention, there is provided a heat pump comprising: a heat pump having a heat output heat exchanger for outputting heat from a heat source system; a heating unit for heating water by heat obtained from the heat output heat exchanger; A circulation unit for circulating the water heated by the heating unit to the upstream side of the heating unit and an inflow part for introducing water from the heating object to the upstream side of the heating unit, And controlling the amount of water to be heated by a predetermined temperature until the temperature of the water on the downstream side of the heating unit reaches the target temperature, And a step of determining an adjustment amount of the heat pump control so that the temperature of the water on the downstream side of the part increases.

According to the present invention, the temperature of the hot water on the upstream side or the downstream side of the heating section is increased by a predetermined temperature until the temperature of the hot water on the upstream side of the heating section reaches the target temperature. Is determined. Thereby, the temperature raising rate in the transient state of the hot water system can be appropriately controlled.

1 is a schematic configuration diagram of a hot water heating system according to a first embodiment of the present invention.
2 is a schematic block diagram showing the configuration of a control apparatus according to the first embodiment of the present invention.
3 is a flowchart showing the operation of the control apparatus according to the first embodiment of the present invention.
4 is a schematic configuration diagram of a hot water heating system according to a second embodiment of the present invention.
5 is a schematic block diagram showing a configuration of a control apparatus according to a second embodiment of the present invention.
6 is a schematic configuration diagram of a hot water heating system according to a third embodiment of the present invention.
7 is a schematic block diagram showing the configuration of a control apparatus according to a third embodiment of the present invention.
8 is a flowchart showing the operation of the control apparatus according to the third embodiment of the present invention.
9 is a schematic configuration diagram of a hot water heating system according to a fourth embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(First Embodiment)

1 is a schematic configuration diagram of a hot water heating system according to a first embodiment of the present invention.

The hot water heating system includes a heat pump 20 for outputting heat from a heat source system 10, a hot water system 30 for heating water by heat output from the heat pump 20, (Not shown).

The heat pump 20 includes a pipe filled with a heating medium and an evaporator 21 connected to the pipe, a compressor 22, a condenser 24 (a heat output heat exchanger), and an expansion valve 25.

The evaporator (21) raises the temperature of the heating medium by the heat outputted from the heat source system (10).

The compressor 22 compresses and liquefies the heating medium heated by the evaporator 21.

The vane 23 adjusts the flow rate of the heating medium liquefied by the compressor 22.

The condenser (24) supplies heat of the heating medium flowing from the vane (23) to the hot water system (30).

The expansion valve (25) reduces the pressure of the heating medium cooled by the condenser (24) and vaporizes it.

The hot water system 30 is composed of an inflow section 31, a circulation pump 32, a heating section 33, a three-way valve 34 (adjustment section), a circulation section 35 and an outflow section 36.

The inflow portion 31 allows water to flow from the object to be heated to the heating portion 33 through the circulation pump 32.

The circulation pump 32 pressurizes the inflowed water to the heating unit 33. [

The heating unit 33 heats the water introduced from the circulation pump 32 by the heat supplied from the condenser 24 and supplies the heated water to the three-way valve 34.

Way valve 34 allows part of the water heated by the heating part 33 to flow into the circulation part 35 in accordance with the degree of opening thereof (flow distribution), and the remaining part flows into the outflow part 36.

The circulation unit 35 circulates the water from the three-way valve 34 through the circulation pump 32 to the heating unit 33.

The outflow portion (36) causes water to flow out from the three-way valve (34) to the heating object.

The hot water system 30 is further provided with an inlet flow rate detector 51, an inlet temperature detector 52, a heating flow rate detector 53, a heating upstream side temperature detector 54, a heating downstream side temperature detector 55 Is installed.

The inflow portion flow rate detector 51 detects the flow rate F ₁ of the water flowing through the inflow portion 31.

The inlet temperature detector 52 detects the temperature T ₁ of the water flowing through the inlet 31.

The heating portion flow rate detector 53 detects the flow rate F ₂ of the water flowing through the heating portion 33.

The upstream side temperature detector 54 of the heating section detects the temperature of water on the upstream side of the heating section 33. That is, the temperature detector 54 on the upstream side of the heating section detects the temperature T ₂ of the water before being heated in the heating section 33.

The downstream part temperature detector 55 detects the temperature of water on the downstream side of the heating part 33. That is, the temperature detector on the downstream side of the heating section 55 detects the temperature T ₃ of the water after being heated in the heating section 33.

2 is a schematic block diagram showing the configuration of the control device 40 according to the first embodiment of the present invention.

The control device 40 includes a sensor information acquisition unit 401, an upstream side temperature change rate calculation unit 402 (adjustment temperature calculation unit), an upstream side target temperature setting unit 403, a heat pump information input unit 404, Side target surface temperature setting section 405, and a three-way valve control section 406 (adjustment amount determining section).

The sensor information acquisition unit 401 acquires the sensor information (flow rate and temperature) detected by the respective detectors installed in the hot water system 30.

The upstream-side temperature change rate calculating section 402 calculates the upstream-side temperature change rate calculating section 402 based on the sensor information acquired by the sensor information acquiring section 401, based on the rate of change of the water temperature on the upstream side of the heating section 33 . The rate of change of the water temperature is calculated by applying the sensor information to the heat storage model.

The upstream side target temperature setting section 403 sets the upstream side target temperature to the upstream side of the heating section 33 when the hot water system 30 is in the steady state when the heat pump 20 and the hot water system 30 are operated And sets the target temperature of water in the water.

The heat pump information input unit 404 accepts input of heat pump information indicating whether or not the compressor 22 of the heat pump 20 has started operating.

The upstream side target surface temperature setting unit 405 sets the upstream side target temperature setting unit 405 to the upstream side target temperature setting unit 405 and the heat pump information input unit 404 The target temperature of the water on the upstream side of the heating unit 33 at the current time is set according to the information. More specifically, the upstream side target surface temperature setting unit 405 sets the current water temperature on the upstream side of the heating unit 33 to the target upstream side temperature setting unit 405 when the compressor 22 of the heat pump 20 is not in operation , The target temperature is set to the current temperature. That is, the target target temperature is set so as to preserve the present water temperature. The upstream side target surface temperature setting unit 405 sets the upstream side target temperature setting unit 405 to the upstream side target temperature setting unit 405 until the current water temperature on the upstream side of the heating unit 33 reaches the upstream side target temperature, Side target temperature on the basis of the temperature change rate calculated by the temperature-change-rate calculating unit 402. [ The upstream side target surface temperature setting unit 405 sets the upstream side target temperature setting unit 405 such that the upstream side target temperature setting unit 405 sets the upstream side target temperature setting unit 403 One target temperature is set as the target temperature in the present moment.

The three-way valve control unit 406 controls the three-way valve control unit 406 to control the three-way valve control unit 406 based on the target surface temperature set by the upstream side target surface temperature setting unit 405 and the PID (Proportional / Directional control of the three-way valve 34 by the integral / differential control.

Next, the operation of the control device 40 at the start of operation of the hot water heating system according to the present embodiment will be described.

3 is a flowchart showing the operation of the control device 40 according to the first embodiment of the present invention.

First, the upstream-side target temperature setting unit 403 of the control device 40 accepts input of the target temperature T _2d on the upstream side of the heating unit 33 from the manager before starting the operation of the hot water heating system (step S1 ).

The manager of the hot water heating system activates the hot water system 30 after setting the target temperature. When the hot water system 30 is activated, the upstream side target surface temperature setting unit 405 determines whether or not the heat pump information to which the heat pump information input unit 404 received the input indicates the start of operation of the compressor 22 (Step S2). Further, the heat pump information indicates the start of operation of the compressor 22 when the manager of the hot water heating system operates the compressor 22.

If the heat pump information indicates that the compressor 22 has not yet been operated (step S2: NO), the upstream side target surface temperature setting unit 405 sets the target temperature unit acquires the temperature T ₂ detected by the upstream temperature sensor 54, and setting the temperature of the upstream side of the heating element 33 for that temperature T ₂ to face the target temperature T _2a (step S3). Next, the three-way valve control unit 406 determines the opening degree so that the water temperature on the upstream side of the heating unit 33 becomes constant at the target surface temperature T _2a , that is, the present temperature T ₂ , Way valve 34 (step S4). That is, the three-way valve control unit 406 controls the opening degree of the three-way valve 34 so that water as much as cooling the heat generated by the circulation pump 32 flows in from the inflow part 31.

Thereby, during the time until the compressor 22 is operated, the three-way valve 34 is opened from the full opening to the circulating portion 35 with a slightly closed opening degree, that is, slightly open to the outlet portion 36 Opening road.

Thereafter, the flow returns to step S2, and the operations from step S2 to step S4 are repeatedly executed until the compressor 22 is operated.

On the other hand, when the upstream side target surface temperature setting unit 405 determines that the heat pump information indicates the start of operation of the compressor 22 (step S2: Yes), the upstream side target surface temperature setting unit 405 reads, from the sensor information acquisition unit 401, The temperature T ₂ detected by the upstream-side temperature detector 54 is obtained. Next, the determining whether an upstream side facing the target temperature setting unit 405, whether that temperature T ₂ is, reaches the target temperature T _2d the upstream-side target temperature setting unit 403 is set (step S5).

If the upstream side target surface temperature setting unit 405 determines that the temperature T ₂ is less than the target temperature T _2d (step S5: NO), the upstream side target surface temperature setting unit 405 sets the temperatures T ₁ , T ₂ , and T ₃ acquired by the sensor information acquisition unit 401 And the heat medium flow rates F ₁ and F ₂ are used to calculate the temperature change rate dT ₂ / dt on the upstream side of the heating section 33 (step S6). The temperature T ₁ is the temperature of the water flowing through the inflow section 31. The temperature T ₂ is the temperature of water on the upstream side of the heating section 33. The temperature T ₃ is the temperature of water on the downstream side of the heating section 33. The flow rate F ₁ is the flow rate of water flowing through the inflow section 31. The flow rate F ₂ is the flow rate of water flowing through the heating section 33.

Here, the upstream-side temperature change rate calculating unit 402 calculates the temperature change rate dT ₂ / dt by substituting each sensor information into Equation (1) representing the heat and pressure model described below.

Here, M represents the quantity held by the heating section 33. Further, cp _n (n is a natural number) represents the specific heat of water at the temperature T _n . Since the specific heat is determined by the water temperature, the upstream-side temperature change rate calculation unit 402 calculates the specific heat cp _n in accordance with the temperature T _n . Further, Q _pump represents the amount of heat input into the water in the circulation pump 32. Since the amount of heat from the circulation pump 32 to water is determined by the flow rate F _{2 of} the water passing through the circulation pump 32 and the number of revolutions, power consumption and characteristics of the circulation pump 32, the upstream-side temperature change rate calculation unit 402 calculate the heat input quantity Q _pump in accordance with these values. Since the sensor information detected by each detection section includes the detection delay, the upstream-side temperature change rate calculating section 402 calculates the quantity of heat M, the specific heat cp _n, and the heat input quantity Q _pump as the data of the transient state during the actual engine operation , The estimation precision may be improved.

Referring to Equation (1), the denominator on the right side of Equation (1) represents the heat capacity of water held by the heating unit (33). The numerator of the right side of Equation 1 indicates the amount of water mixed with the water flowing into the upstream portion of the heating portion 33 from the inlet portion 31 and the water circulated by the circulation portion 35, ) Represents the heat quantity of the difference of the heat quantity of the water flowing in. That is, the temperature change rate dT ₂ / dt is determined by the temperature of the water mixed with the water flowing into the upstream side of the heating section 33 from the inlet section 31 and the water circulated by the circulation section 35, Is calculated by the difference in the temperature of the water circulating in the water.

Next, the upstream side target surface temperature setting unit 405 sets the value obtained by adding the temperature change rate calculated by the upstream side temperature change rate calculating unit 402 to the temperature T ₂ acquired by the sensor information acquiring unit 401, The temperature T _2a is set (step S7). Next, the three-way valve control unit 406 determines the degree of opening such that the water temperature on the upstream side of the heating unit 33 becomes the target surface temperature T _2a and controls the three-way valve 34 based on the degree of opening (Step S8). As a result, the three-way valve control unit 406, the characteristics of, the hot water system (30) until the temperature T ₂ on the upstream side of the heating element 33 reaches the target temperature T _2d [each unit temperature, flow rate and heating The opening degree of the three-way valve 34 can be controlled with an appropriate rate of temperature change according to the amount of water stored in the three- Thereafter, the operations in steps S5 to S8 are repeatedly executed until the temperature T ₂ reaches the target temperature T _2d in step S5.

In step S5, if the upstream side target surface temperature setting unit 405 determines that the temperature T ₂ has reached the target temperature T _2d (step S5: YES), the target side temperature T _2d is set to the target target temperature T _2a (Step S9). Next, the three-way valve control unit 406 determines the degree of opening such that the water temperature on the upstream side of the heating unit 33 becomes the target surface temperature T _2a , that is, the target temperature T _2d . Based on the degree of opening, And controls the valve 34 (step S10). Thereafter, the control device 40 terminates the control of the three-way valve 34 in the transient state and performs the steady-state control for controlling the opening degree of the three-way valve 34 based on the target temperature T _2d . The control of the three-way valve 34 in the steady state is the same as the processing of repeating steps S9 and S10.

In this way, according to this embodiment, the three-way valve control unit 406, until the temperature of the water on the upstream side of the heat pump 20, the portion up and then heated (33) reaches the target temperature T _2d, a predetermined Way valve 34 is controlled so that the temperature of the water on the upstream side of the heating section 33 is increased by the temperature of the three-way valve 34. Thus, when the hot water system 30 is in the transient state, the opening degree of the three-way valve 34 can be controlled to such an extent that the opening and closing operations of the three-way valve 34 can follow the temperature change of the hot water . Particularly, in the present embodiment, the predetermined temperature is the temperature of the water flowing in the heating section 33, the water circulated by the circulation section 35, and the water flowing in from the inlet section 31 to the upstream side of the heating section 33 Based on the state of water. Thereby, the opening degree of the three-way valve 34 can be controlled in accordance with the characteristics of the hot water heating system, and the water temperature on the upstream side of the heating unit 33 can be raised to the target temperature T _2a have. Particularly, as shown in this embodiment, the temperature of the water mixed with the water flowing into the upstream side of the heating section 33 from the inflow section 31 and the water circulated by the circulation section 35, By using the temperature change rate dT ₂ / dt, which is the temperature of the difference between the temperatures of the water circulating in the circulation line,

In the present embodiment, the three-way valve control unit 406 has been described in which the degree of opening is controlled using the temperature change rate dT ₂ / dt calculated by the upstream side temperature change rate calculation unit 402, The degree of opening of the three-way valve 34 may be controlled so that the water temperature on the upstream side of the heating section 33 is increased by another predetermined temperature. However, if the predetermined temperature is set too low, the opening degree is controlled to be open to the outflow section 36, and the temperature rise of the upstream side of the heating section 33 is delayed, It takes time until it transitions to the steady state. On the other hand, if the predetermined temperature is set excessively, the opening degree is controlled to be open to the circulation section 35, and the temperature rise of the upstream side of the heating section 33 is accelerated, Closing operation of the hot water can not follow the temperature change of the hot water. In this case, there is a problem that the amount of heat exchanged in the condenser 24 of the heat pump 20 becomes small and the efficiency of the hot water heating system deteriorates.

(Second Embodiment)

Next, a second embodiment of the present invention will be described. The hot water heating system according to the second embodiment sets the target temperature on the upstream side of the heating section 33 of the hot water system 30 based on the characteristics of the heat source system 10 and the hot water system 30. [

4 is a schematic configuration diagram of a hot water heating system according to a second embodiment of the present invention.

The hot water heating system according to the second embodiment is provided with the heat source upstream side temperature detector 56 and the heat source flow rate detector 57 in the heat source system 10 of the hot water heating system according to the first embodiment, (40) are different.

The heat source upstream side temperature detector 56 detects the temperature T ₄ of the hot water on the upstream side of the heat source system 10.

The heat source flow rate detector 57 detects the flow rate F ₃ of the hot water flowing through the heat source system 10.

5 is a schematic block diagram showing the configuration of the control device 40 according to the second embodiment of the present invention.

The control device 40 according to the second embodiment is provided with the downstream-side target temperature setting section 407 in addition to the configuration of the control device 40 according to the first embodiment, and the upstream-side target temperature setting section 403 ) Is different.

The downstream target temperature setting unit 407 sets the downstream side target temperature setting unit 407 on the downstream side of the heating unit 33 when the hot water system 30 is in the steady state when the heat pump 20 and the hot water system 30 are operated And sets the target temperature of water in the water.

The upstream-side target temperature setting section 403 sets the upstream-side target temperature setting section 403 to the heating section 33 (see FIG. 3) when the hot water system 30 is in the steady state, based on the downstream target temperature and the sensor information acquired by the sensor information acquiring section 401 The target temperature of the water on the upstream side of the water temperature sensor is set.

Next, the operation of the control device 40 at the start of operation of the hot water heating system according to the present embodiment will be described.

The operation of the control device 40 according to the second embodiment is different from the operation of the control device 40 of the first embodiment and the operation of the step S1 and the operation after the step S1 is the same as that of the first embodiment will be.

Therefore, the operation of step S1 in the second embodiment will be described here.

The target temperature setting unit 407 on the downstream side of the controller 40 receives the input of the target temperature T _3d on the downstream side of the heating unit 33 from the manager before starting the operation of the hot water heating system. Next, the upstream-side target temperature setting unit 403 obtains the sensor information ten won from the acquisition section 401, the upstream-side temperature sensor 56 and the detected temperature ten won the flow rate detector (57), T _4, and the flow rate F ₃ . Then, the upstream-side target temperature setting unit 403, on the basis of the acquired temperature T ₄ and the flow rate F ₃ calculates the maximum amount of heat in the condenser 24 at the time of maximum output of the heat pump (20). Next, the upstream-side target temperature setting unit 403, the water flow through the calculated maximum amount of heat, heating element 33 F ₂ and upstream of the downstream-side target temperature T, the heating unit 33 on the basis of the _3d of Side target temperature T _2d . Specifically, the upstream-side target temperature setting section 403 sets the upstream-side target temperature setting section 403 to the heating section 33 (required to set the water temperature on the downstream side of the heating section 33 to the target temperature T _3d by the maximum output of the heat pump 20) ) Is the target temperature T _2d .

Thereafter, the temperature of the hot water system 30 can be controlled so as to maximize the capability of the heat pump 20 according to the conditions of the heat source system 10, by executing the processing of step S2 and subsequent steps as in the first embodiment .

(Third Embodiment)

Next, a third embodiment of the present invention will be described. The hot water heating system according to the third embodiment is capable of controlling the opening degree of the vane 23 of the heat pump 20 based on the temperature on the downstream side of the heating section 33 of the hot water system 30 ).

6 is a schematic configuration diagram of a hot water heating system according to a third embodiment of the present invention.

The hot water heating system according to the third embodiment is provided with the condenser temperature detector 58 in the hot water system 30 of the hot water heating system according to the first embodiment and the operation of the control device 40 is different. In the hot water heating system according to the third embodiment, the inlet-side temperature detector 52 and the inlet-portion flow rate detector 51 may not be provided.

The condenser temperature detector 58 detects the temperature T ₅ of the condenser 24 of the heat pump 20.

7 is a schematic block diagram showing the configuration of the control device 40 according to the third embodiment of the present invention.

The control device 40 according to the third embodiment includes a sensor information acquisition unit 401, a downstream side temperature change rate calculation unit 408 (heat pump adjustment temperature calculation unit), a downstream side target temperature setting unit 407, Side target surface temperature setting section 409, and vane control section 410 (heat pump adjustment amount determining section).

The sensor information acquisition unit 401 acquires the sensor information (flow rate and temperature) detected by the detectors installed in the hot water system 30 and the condenser 24.

The downstream side temperature change rate calculating unit 408 calculates the rate of change of the temperature of the water (the heat pump adjusting temperature) on the downstream side of the heating unit 33 (the temperature of the heat pump) based on the sensor information acquired by the sensor information acquiring unit 401 And calculates the rising speed. The rate of change of the water temperature is calculated by applying the sensor information to the heat storage model.

The downstream target temperature setting unit 407 sets the target temperature of the water on the downstream side of the heating unit 33 when the hot water system 30 is in the steady state when the heat pump 20 is operated, .

The downstream side target surface temperature setting section 409 sets the downstream side target temperature setting section 409 at the current time based on the information acquired from the sensor information acquisition section 401, the downstream side temperature change rate calculation section 408 and the downstream side target temperature setting section 407 The target temperature of the water on the downstream side of the heating unit 33 of the water heater 33 is set. Specifically, the downstream-side facing target temperature setting section 409 sets the downstream-side temperature change rate calculating section 408 until the current water temperature on the downstream side of the heating section 33 reaches the downstream-side target temperature. The target temperature is set on the basis of the calculated temperature change rate. The downstream side target surface temperature setting unit 409 sets the downstream side target temperature setting unit 409 such that the downstream side target temperature setting unit 409 sets the downstream side target temperature setting unit 409 such that, One target temperature is set as the target temperature in the present moment.

The vane control unit 410 controls the vane control unit 410 based on the PID control based on the target surface temperature set by the downstream side target surface temperature setting unit 409 and the current water temperature on the downstream side of the current heating unit 33, (23) is controlled.

Next, the operation of the control device 40 at the start of operation of the hot water heating system according to the present embodiment will be described.

8 is a flowchart showing the operation of the control device 40 according to the third embodiment of the present invention.

The target temperature setting unit 407 on the downstream side of the controller 40 receives the input of the target temperature T _3d on the downstream side of the heating unit 33 from the manager before starting the operation of the hot water heating system ).

The manager of the hot water heating system activates the hot water system 30 after setting the target temperature, and then operates the compressor 22.

The downstream side target surface temperature setting unit 409 acquires the temperature T ₃ detected by the temperature detector on the downstream side of the heating unit 55 from the sensor information acquisition unit 401. Next, a determination whether or not the downstream side facing the target temperature setting unit 409, that temperature is T _3, the downstream-side target temperature setting unit 407 is the target temperature has reached the set T _3d (step S12).

If the downstream side target surface temperature setting unit 409 determines that the temperature T ₃ is less than the target temperature T _3d (step S12: NO), the downstream side facing target temperature setting unit 409 sets the temperatures T ₂ , T ₃ , and T ₅ and calculates the temperature change rate dT ₃ / dt at the downstream side of the heat medium flow rate F ₂ heating element 33 by using (step S13). The temperature T ₂ is the temperature of water on the upstream side of the heating section 33. The temperature T ₃ is the temperature of water on the downstream side of the heating section 33. The temperature T ₅ is the temperature of the heating medium in the condenser 24. The flow rate F ₂ is the flow rate of water flowing through the heating section 33.

Here, the downstream-side temperature change rate calculating unit 408 calculates the temperature change rate dT ₃ / dt by substituting each sensor information into Equation (2) indicating the heat-receiving model described below.

Where U and A represent the overall heat transfer coefficient and heat transfer area of the condenser 24, respectively. The values of U and A may be calculated in advance as a design value of the heat pump 20, but the present invention is not limited to this and may be determined from the data in the steady state during the actual operation. Further, U · A can be calculated by the calculation of Equation (3) described below.

Referring to Equation (2), the denominator on the right side of Equation (2) represents the heat capacity of water held by the heating unit (33). The right-hand side numerator of the equation (2) is a value obtained by subtracting the sum of the amount of water flowing in the heating part 33 and the amount of heat in the heating part 33 from the heating part 33 to the three way valve 34 Represents the calorific value of the difference in the calorific value of the incoming water. That is, the temperature change rate dT ₃ / dt is a temperature change rate dT ₃ / dt, which is a temperature change rate when the water flowing into the heating section 33 is heated by the heating section 33, Is calculated by the difference in the temperature of the water.

Next, the downstream-side target surface temperature setting unit 409 sets the value obtained by adding the temperature change rate calculated by the downstream-side temperature change rate calculating unit 408 to the temperature T ₃ acquired by the sensor information acquiring unit 401, The temperature T _3a is set (step S14). Next, the vane control unit 410 determines the opening degree of the vane 23 so that the water temperature on the downstream side of the heating unit 33 becomes the target surface temperature T _3a , and controls the vane 23 to be in the open state (Step S15). The vane control unit 410 controls the vane 23 to cool the vane 23 at an appropriate temperature change rate according to the characteristics of the heating unit 33 until the water temperature T ₃ on the downstream side of the heating unit 33 reaches the target temperature T _3d Can be controlled. Then, until the temperature reaches the target temperature T ₃ T _3d, in step S12, and repeatedly executes the operations of steps S12~ step S15.

In step S12, the downstream side facing the target temperature setting unit 409, when it is determined that the temperature T ₃ reaches the target temperature T _3d (step S12: YES), the target temperature T _3d set up to face the target temperature T _3a (Step S16). Next, the vane control unit 410 determines the opening degree such that the water temperature on the downstream side of the heating unit 33 becomes the target surface temperature T _3a , that is, the target temperature T _3d , and controls the opening road vane 23 (Step S17). Thereafter, the control device 40 terminates the control of the compressor 22 in the transient state, and starts the steady-state control for controlling the opening degree of the vane 23 based on the target temperature T _3d . The control of the vane 23 in the steady state is the same as the processing of repeating steps S16 and S17.

As described above, according to the present embodiment, the vane control unit 410 controls the vane control unit 410 so that the temperature of water on the downstream side of the heating unit 33 after the heat pump 20 is operated reaches a target temperature T _3d The opening degree of the vane 23 is controlled so that the temperature of the water on the downstream side of the heating section 33 increases. Thereby, when the hot water system 30 is in the transient state, the opening degree of the vane 23 can be controlled to such an extent that the opening degree control of the vane 23 can follow the temperature change of the hot water. Particularly, in the present embodiment, the predetermined temperature is the temperature of the water flowing in the heating section 33, the state of the water flowing into the three-way valve 34 from the heating section 33, . As a result, the opening degree of the vane 23 can be controlled according to the characteristics of the hot water heating system, and the water temperature on the downstream side of the heating unit 33 can be raised to the target temperature T _3a at a proper heating rate. Particularly, as shown in the present embodiment, the temperature of the water in the heating section 33 when the water is heated by the heating section 33 and the temperature of the water in the heating section 33, by using a temperature ramp rate of ₃ dT / dt of the difference between the temperature of the water that can be performed the control of a suitable opening.

Further, in the present embodiment, the vane control section 410 has been described in which the opening degree is controlled using the temperature change rate dT ₃ / dt calculated by the downstream side temperature change rate calculation section 408, but the invention is not limited thereto The opening degree of the vane 23 may be controlled so that the water temperature on the downstream side of the heating section 33 rises by another predetermined temperature. However, if the predetermined temperature is set too low, the rate of increase of the opening degree is controlled to be suppressed, the temperature rise of the downstream side of the heating section 33 is delayed, and the hot water system 30 is shifted to the normal state It takes time until it is done. On the other hand, if the predetermined temperature is set too high, the rate of increase of the opening degree is controlled to be slightly higher, and the temperature rise of the downstream side of the heating section 33 is accelerated, It may become impossible to follow the change. In this case, there is a problem that the amount of heat exchanged in the condenser 24 of the heat pump 20 becomes small and the efficiency of the hot water heating system deteriorates.

(Fourth Embodiment)

Next, a fourth embodiment of the present invention will be described. Similar to the second embodiment, the hot water heating system according to the fourth embodiment controls the opening degree of the three-way valve 34 based on the state of the hot water system 30, The opening degree of the vane 23 of the heat pump 20 is controlled based on the state of the heating section 33 of the heat pump 20.

9 is a schematic configuration diagram of a hot water heating system according to a fourth embodiment of the present invention.

The hot water heating system according to the fourth embodiment has the configuration of the hot water heating system according to the second embodiment and the configuration of the hot water heating system according to the third embodiment. The configuration of the control device 40 according to the fourth embodiment also has the configuration of the control device 40 according to the second embodiment and the configuration of the control device 40 according to the third embodiment.

The operation of the hot water heating system according to the fourth embodiment is a combination of the operation of the second embodiment and the operation of the third embodiment.

Specifically, when the downstream-side target temperature is set by the step S11 of the third embodiment, the upstream-side target temperature is calculated by the step S1 of the second embodiment by using the downstream-side target temperature.

In steps S2 to S4 according to the second embodiment, the control device 40 controls the opening degree of the three-way valve 34 only. On the other hand, the control device 40 executes the processing of steps S12 to S15 according to the third embodiment in parallel while executing the processing of step S5 to step S8. The control device 40 performs the processes of steps S16 and S17 according to the third embodiment when performing the processes of steps S9 and S10 according to the second embodiment.

Thereby, the control device 40 can appropriately control the opening of the three-way valve 34 and the opening of the vane 23, respectively.

Although the embodiment of the present invention has been described in detail with reference to the drawings, the specific structure is not limited to the above, and various design changes can be made within the range not deviating from the gist of the present invention Do.

In addition, the above-described control device 40 has a computer system therein. The above-described operations of the respective processing sections are stored in a computer-readable recording medium in the form of a program, and the above processing is performed by the computer reading and executing the program. Here, the computer readable recording medium refers to a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like. Further, the computer program may be distributed to a computer by a communication line, and the computer that receives the distribution may execute the program.

The program may be for realizing a part of the functions described above.

It is also possible to realize the above-described functions in combination with programs already recorded in the computer system, so-called differential files (differential programs).

The present invention relates to a heat pump comprising a heat pump having a heat output heat exchanger for outputting heat from a heat source system, a heating unit for heating water by heat obtained from the heat output heat exchanger, A circulation unit for circulating the water heated by the heating unit to the upstream side of the heating unit; an inflow unit for allowing water to flow from the heating target to the upstream side of the heating unit; An upstream-side target temperature setting section for setting a target temperature of water on the upstream side of the heating section; and an upstream-side target temperature setting section for setting a target temperature of water on the upstream side of the heating section, The temperature of the water on the upstream side of the heating unit rises by a predetermined temperature until the temperature of the water reaches the target temperature An adjustment amount determining section for determining an adjustment amount of the flow amount distribution by the adjustment section. According to the present invention, the temperature of the hot water on the upstream side or the downstream side of the heating section is increased by a predetermined temperature until the temperature of the hot water on the upstream side of the heating section reaches the target temperature. Is determined. Thereby, the temperature raising rate in the transient state of the hot water system can be appropriately controlled.

10: Heat source system
20: Heat pump
21: Evaporator
22: Compressor
23: condenser
24: Expansion valve
30: Hot water system
31:
32: circulation pump
33: Heating section
34: Three way valve
35: circulation part
36:
40: Control device
51: inlet flow detector
52: inlet temperature detector
53: Heating part flow rate detector
54: Temperature detector on the upstream side of the heating part
55: Temperature detector on the downstream side of the heating part
56: Temperature sensor on the upstream side of the heat source
57: Heat source flow detector
58: Condenser temperature detector
401: sensor information acquisition unit
402: upstream side temperature change rate calculating unit
403: upstream-side target temperature setting unit
404: Heat pump information input unit
405: upstream side target surface temperature setting unit
406: Three-way valve control unit
407: downstream target temperature setting unit
408: downstream side temperature change rate calculating unit
409: downstream side target surface temperature setting unit
410: Vane control part

Claims (14)

A heat pump having a heat output heat exchanger for outputting heat from a heat source system,
A heating unit for heating the water by the heat obtained from the heat output heat exchanger,
An outlet portion through which the heated portion flows out to the object to be heated;
A circulation unit for circulating the water heated by the heating unit to the upstream side of the heating unit,
An inflow portion for allowing water to flow from the object to be heated to the upstream side of the heating portion,
And an adjusting unit for adjusting a flow rate distribution of water from the heating unit to the outflow unit and the circulation unit,
An upstream-side target temperature setting unit for setting a target temperature of water on the upstream side of the heating unit,
An adjustment amount determining unit that determines an adjustment amount of the flow rate distribution by the adjustment unit so that the temperature of the water on the upstream side of the heating unit increases by a predetermined temperature until the temperature of the water on the upstream side of the heating unit reaches the target temperature And,
Water flowing from the inflow section to the upstream side of the heating section based on the state of the water circulating in the heating section, the water circulated by the circulation section, and the water flowing into the heating section upstream from the inflow section, And an adjustment temperature calculation unit for calculating a temperature difference between a temperature of water in which water circulated by the circulation unit is mixed and a temperature of water circulating in the heating unit as an adjustment temperature used for determination of the adjustment amount,
The adjustment amount determining section determines that the temperature of the water on the upstream side of the heating section is increased by the adjustment temperature calculated by the adjustment temperature calculating section until the temperature of the water on the upstream side of the heating section reaches the target temperature, And determines an adjustment amount of the flow distribution by the control unit. delete delete The control apparatus according to claim 1, wherein the adjustment amount determining section determines the adjustment amount of the flow amount distribution by the adjustment section so that the temperature of the water flowing into the heating section becomes constant until the heat pump is activated. 2. The apparatus according to claim 1, wherein the upstream-side target temperature setting unit sets the upstream-side target temperature to a predetermined value based on a maximum heating amount of the heating unit, a flow rate of water flowing into the heating unit, and a target temperature of water on the downstream side of the heating unit And sets the target temperature of the water on the side of the water. The apparatus according to claim 1, further comprising: a downstream-side target temperature setting unit for setting a target temperature of water on a downstream side of the heating unit;
A heat pump adjustment amount determining section that determines an adjustment amount of the heat pump control so that the temperature of the water on the downstream side of the heating section increases by a predetermined temperature until the temperature of the water on the downstream side of the heating section reaches the target temperature . 7. The heat pump apparatus according to claim 6, wherein the heat pump adjustment amount determining section determines whether the temperature of the water on the downstream side of the heating section reaches the target temperature, The control unit determines the adjustment amount of the heat pump control so that the temperature of the water on the downstream side of the heating unit increases by a predetermined temperature calculated based on the state of water and the heating amount in the heating unit. The heating apparatus according to claim 7, characterized in that, based on the state of the water circulating in the heating section, the state of the water flowing into the adjusting section from the heating section, and the heating amount in the heating section, And a temperature of a difference between the temperature of the water heated by the heating unit and the temperature of the water flowing into the adjusting unit from the heating unit is set as a heat pump adjusting temperature used for determining an adjustment amount of the heat pump control And a calculating unit,
The heat pump adjustment amount determining section determines the temperature of the water downstream of the heating section by the heat pump adjustment temperature calculated by the heat pump adjustment temperature calculating section until the temperature of water on the downstream side of the heating section reaches the target temperature And determines an adjustment amount of the heat pump control so as to rise. A heat pump having a heat output heat exchanger for outputting heat from a heat source system,
A heating unit for heating the water by the heat obtained from the heat output heat exchanger,
An outlet portion through which the heated portion flows out to the object to be heated;
A circulation unit for circulating the water heated by the heating unit to the upstream side of the heating unit,
A heating control system for controlling a hot water heating system including an inlet for allowing water to flow from an object to be heated to an upstream side of the heating unit,
A downstream-side target temperature setting unit for setting a target temperature of water on the downstream side of the heating unit,
A heat pump adjustment amount determining section that determines an adjustment amount of the heat pump control so that the temperature of the water on the downstream side of the heating section increases by a predetermined temperature until the temperature of the water on the downstream side of the heating section reaches the target temperature Respectively,
The heat pump adjustment amount determining unit determines the state of the water flowing through the heating unit and the water flowing out of the heating unit until the temperature of the water on the downstream side of the heating unit reaches the target temperature, Wherein the control unit determines the adjustment amount of the heat pump control so that the temperature of water on the downstream side of the heating unit rises by a predetermined temperature calculated based on the heating amount. delete The heating apparatus according to claim 9, characterized in that the water circulated in the heating section is heated by the heating section based on the state of the water circulating in the heating section, the state of the water flowing out of the heating section, And a heat pump adjusting temperature calculating unit for calculating a temperature of a difference between a temperature of the heated water and the temperature of the water flowing out of the heating unit as a heat pump adjusting temperature used for determining an adjustment amount of the heat pump control,
The heat pump adjustment amount determining section determines the temperature of the water downstream of the heating section by the heat pump adjustment temperature calculated by the heat pump adjustment temperature calculating section until the temperature of water on the downstream side of the heating section reaches the target temperature And determines an adjustment amount of the heat pump control so as to rise. A heat pump having a heat output heat exchanger for outputting heat from a heat source system,
A heating unit for heating the water by the heat obtained from the heat output heat exchanger,
An outlet portion through which the heated portion flows out to the object to be heated;
A circulation unit for circulating the water heated by the heating unit to the upstream side of the heating unit,
An inflow portion for allowing water to flow from the object to be heated to the upstream side of the heating portion,
An adjustment unit for adjusting a flow rate distribution of water from the heating unit to the circulation unit and the outflow unit,
A hot water heating system comprising the control device according to any one of claims 1, 4 to 9 and 11. A heat pump having a heat output heat exchanger for outputting heat from a heat source system,
A heating unit for heating the water by the heat obtained from the heat output heat exchanger,
An outlet portion through which the heated portion flows out to the object to be heated;
A circulation unit for circulating the water heated by the heating unit to the upstream side of the heating unit,
An inflow portion for allowing water to flow from the object to be heated to the upstream side of the heating portion,
And an adjustment unit for adjusting the flow rate distribution of water from the heating unit to the circulation unit and the outflow unit, the control method comprising:
A step of determining a target temperature of water on the upstream side of the heating unit,
And a step of determining an adjustment amount of the flow distribution by the adjustment unit so that the temperature of the water on the upstream side of the heating unit increases by a predetermined temperature until the temperature of the water on the upstream side of the heating unit reaches the target temperature ,
Wherein the adjustment amount is set such that water circulated in the heating unit, water circulated by the circulation unit, and water circulating in the upstream part of the heating unit from the inlet unit until the temperature of water on the upstream side of the heating unit reaches the target temperature , The temperature of the water on the upstream side of the heating section is determined to be increased by a predetermined temperature calculated based on the state of the water flowing into the heating section. A heat pump having a heat output heat exchanger for outputting heat from a heat source system,
A heating unit for heating the water by the heat obtained from the heat output heat exchanger,
An outlet portion through which the heated portion flows out to the object to be heated;
A circulation unit for circulating the water heated by the heating unit to the upstream side of the heating unit,
A control method for controlling an amount of adjustment of a heat pump of a hot water heating system having an inlet portion for allowing water to flow from an object to be heated to an upstream side of the heating portion,
A step of determining a target temperature of water on the downstream side of the heating unit,
And a step of determining an adjustment amount of the heat pump control so that the temperature of the water on the downstream side of the heating unit increases by a predetermined temperature until the temperature of the water on the downstream side of the heating unit reaches the target temperature,
Wherein the adjustment amount is determined based on the state of the water circulating in the heating unit and the water flowing out of the heating unit and the heating amount in the heating unit until the temperature of the water on the downstream side of the heating unit reaches the target temperature The temperature of the water on the downstream side of the heating unit is determined to be increased by a predetermined temperature calculated by the heating unit.

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