JP2018044715A - Hot water storage type heat source cooling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a heat source to be highly accurately and safely cooled with simple control.SOLUTION: In a hot water storage type heat source cooling device 10, heat radiation unit control means 9 is configured to: activate a heat radiation unit 2, based on a hot water temperature (Tin) of an outgoing path 4 for heat radiation; execute operation amount adjustment control of adjusting an operation amount of the heat radiation unit 2 to a maximum operation amount or an intermediate operation amount smaller than the maximum operation amount, based on a hot water temperature (Tout) of an outgoing path 5 for heating; and stop the heat radiation unit 2, based on the hot water temperature (Tin) of the outgoing path 4 for heat radiation.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a hot water storage type heat source cooling device having a circulation pump, a hot water storage tank, a heat radiating unit, and a heat source unit.

  A cooling device for cooling a heat source such as a fuel cell with water is known. In the device of Patent Document 1, highly accurate temperature control is performed in consideration of the coolant delay time from the fuel cell to the radiator.

  Specifically, in the apparatus of Patent Document 1, the fuel cell heat generation amount prediction means predicts the heat generation amount based on the output of the fuel cell. The pump control means controls the pump based on the predicted heat generation amount. The coolant radiator arrival delay calculating means calculates a delay time for the coolant to reach the radiator from the fuel cell. The coolant three-way valve arrival delay calculating means calculates a delay time for the coolant to reach the three-way valve from the fuel cell. The radiator fan control means drives the radiator fan based on the delay time calculated by the coolant radiator arrival delay calculating means. The three-way valve control means controls the opening degree of the three-way valve based on the delay time calculated by the coolant three-way valve arrival delay calculating means.

JP 2004-253213 A

  In the apparatus of Patent Document 1, setting of delay time and dead time, calculation of target heat dissipation based on fuel cell output, correction of target heat dissipation based on fuel cell inlet coolant temperature, and air flow of the radiator fan with respect to the target heat dissipation are obtained. Therefore, the control is complicated because a radiator characteristic map or the like is required.

  The present invention has been made in view of the above-described problems, and an object thereof is to realize highly accurate and safe heat source cooling by simple control.

The characteristic configuration of the hot water storage type heat source cooling device for achieving the above object is as follows:
A circulation pump for circulating hot water, a hot water storage tank for storing hot water, a heat radiating part for radiating heat from the hot water, a heat source part for applying heat to the hot water, and heating,
A heat release path for supplying hot water in the lower part of the hot water tank to the heat radiating section;
A heating outbound path for supplying hot water flowing through the heat radiating section to the heat source section;
A heating return path for returning hot water flowing through the heat source part to the upper part of the hot water storage tank;
A heat-dissipation path temperature detecting means for detecting the hot water temperature of the heat-dissipation path;
A heating outbound temperature detecting means for detecting a hot water temperature in the heating outbound path;
A hot water storage type heat source cooling device provided with a heat radiation part control means for controlling the operation of the heat radiation part,
The heat radiating part control means includes:
Based on the hot water temperature of the heat dissipation path, the heat dissipation unit is activated,
Based on the hot water temperature of the heating outbound path, the operation amount adjustment control for adjusting the operation amount of the heat radiating unit to the maximum operation amount or an intermediate operation amount smaller than the maximum operation amount is performed,
The heat dissipating part is stopped based on the hot water temperature of the heat dissipating path.

  According to the above characteristic configuration, the heat radiating unit control means activates the heat radiating unit based on the hot water temperature of the heat radiating path, and sets the operation amount of the heat radiating unit to the maximum operating amount or based on the hot water temperature of the heating path. The operation amount adjustment control that adjusts to an intermediate operation amount that is smaller than the maximum operation amount is executed, and the heat dissipating part is stopped based on the hot water temperature of the heat dissipating path. Since the adjustment control is separated, high-precision temperature control can be easily realized, which is preferable.

  Another characteristic configuration of the hot water storage type heat source cooling device according to the present invention is that, when the hot water temperature of the heat release path is equal to or higher than a predetermined starting temperature, the heat radiating unit control means operates the heat radiating unit with a maximum operating amount. The heat radiating section is stopped when the hot water temperature in the heat dissipation path continues below a stop temperature lower than the start temperature for a predetermined time.

  According to the above characteristic configuration, when the hot water temperature in the heat dissipation path is equal to or higher than the predetermined start temperature, the heat dissipation section control means starts the heat dissipation section with the maximum operating amount, and the hot water temperature in the heat dissipation path However, since the heat dissipating part is stopped when the temperature below the stop temperature lower than the start temperature is continued for a predetermined time, it is preferable that the heat dissipating part can be started and cooled by the control in a simple manner.

Another characteristic configuration of the hot water storage type heat source cooling device according to the present invention is that the heat radiating unit control means is in a state where the heat radiating unit is activated,
In a state where the operation amount adjustment control is not executed and the hot water temperature of the heating outbound path is equal to or lower than a predetermined control start temperature, the operation amount adjustment control is started.
Execution of the operation amount adjustment control when the operation amount adjustment control is being executed and the hot water temperature in the heating outbound path is equal to or higher than a predetermined control stop temperature that is higher than the control start temperature. Is stopped and the amount of operation of the heat radiating portion is maximized.

  According to the above characteristic configuration, the heat radiating section control means is in a state where the operation amount adjustment control is not executed in a state where the heat radiating section is activated, and the hot water temperature in the heating forward path is equal to or lower than a predetermined control start temperature. In the case where the operation amount adjustment control is started and the operation amount adjustment control is being executed, and the hot water temperature in the heating forward path is equal to or higher than a predetermined control stop temperature that is higher than the control start temperature. In addition, since the operation amount adjustment control is stopped and the operation amount of the heat radiating unit is maximized, the operation amount adjustment control is started and stopped by the simple control (the operation of the heat dissipation unit at the maximum operation amount). It is possible to achieve both control simplification and fail-safe realization.

  Another characteristic configuration of the hot water storage type heat source cooling device according to the present invention is that, in the operation amount adjustment control, the heat dissipating unit control means sets the operation amount of the heat dissipating unit as the heating amount in the period of the previous operation amount adjustment control. A value obtained by multiplying the deviation between the average or maximum value of the hot / cold water temperature of the road and the predetermined target temperature by a predetermined control coefficient is added to the previous operation amount that is the operation amount in the previous operation amount adjustment control. The point is to adjust to the value.

  According to the above characteristic configuration, the heat radiating unit control means, in the operation amount adjustment control, the operation amount of the heat radiating unit, the average value or the maximum value of the hot water temperature of the heating outbound path during the previous operation amount adjustment control, A value obtained by multiplying the deviation from the predetermined target temperature by a predetermined control coefficient is adjusted to a value added to the previous operation amount that is the operation amount in the previous operation amount adjustment control. It is simple and more suitable.

  Another characteristic configuration of the hot water storage type heat source cooling device according to the present invention is that the heat radiating unit control means determines a value of the control coefficient based on a water supply temperature.

  According to the above characteristic configuration, since the heat radiating unit control means determines the value of the control coefficient based on the feed water temperature, the amount by which the cooling capacity of the heat radiating unit decreases at a high temperature can be easily simplified by the feed water temperature that can be easily measured. Therefore, the control can be performed with higher accuracy, which is preferable.

  Another characteristic configuration of the hot water storage type heat source cooling device according to the present invention is that the heat radiating unit control means is not set with an average value or a maximum value of the hot water temperature in the heating outbound path during the previous operation amount adjustment control. In this case, the operating amount of the heat radiating unit is determined based on the water supply temperature.

  According to the above characteristic configuration, the heat dissipating unit control means supplies the operation amount of the heat dissipating unit when the average or maximum value of the hot water temperature in the heating path in the previous operation amount adjustment control period is not set. Since it determines based on temperature, operation amount can be set with the feed water temperature which can be measured easily, and control becomes simpler and is suitable.

  Another characteristic configuration of the hot water storage type heat source cooling device according to the present invention is that the heat dissipating unit control means determines a lower limit value of an operation amount of the heat dissipating unit in the operation amount adjustment control based on a water supply temperature.

  According to the above characteristic configuration, the heat radiating unit control means determines the lower limit value of the operation amount of the heat radiating unit in the operation amount adjustment control based on the water supply temperature, so the operation of the heat radiating unit based on the water supply temperature that can be easily measured. It is possible to avoid a situation in which the amount becomes excessively small, and it is more preferable that both simplification of control and realization of fail safe can be achieved.

  Another feature of the hot water storage type heat source cooling device according to the present invention is that the heat radiating section includes a heat exchanger through which hot water flows and a radiator fan that air-cools the heat exchanger, and the heat radiating section control means. Is that the adjustment of the operation amount of the heat radiating unit is performed by controlling the rotation speed of the radiator fan or controlling the duty ratio of driving the radiator fan.

  According to the above characteristic configuration, the heat radiating section has a heat exchanger through which hot water flows and a radiator fan that air-cools the heat exchanger, and the heat radiating section control means adjusts the operation amount of the heat radiating section. Since it is performed by controlling the rotation speed of the radiator fan or by controlling the duty ratio of driving the radiator fan, it is preferable that heat radiation from the hot water by the heat radiating section can be realized with a simple configuration and control.

  Another feature of the hot water storage type heat source cooling device according to the present invention is that the heat dissipating part includes a heat exchanger through which hot water flows, a radiator fan that air-cools the heat exchanger, and a bypass that bypasses the heat exchanger. The heat radiating section control means is configured to adjust the operation amount of the heat radiating section by controlling the flow rate of hot water to the bypass path.

  According to said characteristic structure, a thermal radiation part has a heat exchanger with which hot water flows, a radiator fan which air-cools a heat exchanger, and a bypass passage which bypasses a heat exchanger, and a thermal radiation control means Since the adjustment of the operation amount of the heat radiating unit is performed by controlling the flow rate of hot water to the bypass passage, heat radiation from the hot water by the heat radiating unit can be realized with a simple configuration and control.

Schematic showing the configuration of the hot water storage heat source cooling device The flowchart which shows the outline of the operation control performed with the hot water storage type heat source cooling device The flowchart which shows the outline | summary of the operation amount adjustment control performed with a hot water storage type heat source cooling device.

  Hereinafter, the hot water storage type heat source cooling device according to the present embodiment will be described with reference to the drawings. As shown in FIG. 1, the hot water storage type heat source cooling device 10 includes a circulation pump P, a hot water storage tank 1, a heat radiating unit 2, a heat source unit 3, a heat radiating forward channel 4, a heating forward channel 5, a heating return channel 6, and a first temperature sensor. 7 (heat dissipation path temperature detecting means), a second temperature sensor 8 (heating outbound path temperature detecting means), and a heat dissipation section control means 9. The heat release path 4, the heating path 5 and the heating return path 6 function as a hot water circulation path for circulating hot water between the hot water storage tank 1, the heat radiation part 2 and the heat source part 3 by the circulation pump P.

  The hot water tank 1 stores hot water. The heat radiating unit 2 performs heat radiation from the hot water flowing through the inside, and cools the hot water. The heat source unit 3 is a fuel cell, for example, and heats the hot water by supplying heat to the hot water flowing inside.

  The heat radiating unit 2 includes a heat exchanger 2a, a radiator fan 2b, and a bypass path 2c. The heat exchanger 2a cools the hot water by exchanging heat between the hot water flowing inside and the outside air.

  The radiator fan 2b is driven by a motor (not shown), blows air to the heat exchanger 2a, and cools the heat exchanger 2a. The operation of the radiator fan 2 b is controlled by the heat radiating unit control means 9. For example, the heat radiating unit control means 9 controls the rotational speed of the radiator fan 2b, thereby adjusting the operation amount of the heat radiating unit 2. Alternatively, the heat radiating unit control means 9 controls the duty ratio of driving of the radiator fan 2b, thereby adjusting the operation amount of the heat radiating unit 2.

  The bypass path 2c is a flow path that connects the upstream side (heat radiation path 4) and the downstream side (heating path 5) of the heat exchanger 2a to bypass the heat exchanger 2a. The heat radiating section control means 9 controls the flow rate adjustment valve (not shown) provided in the bypass path 2c to control the flow rate of hot water flowing through the bypass path 2c, thereby adjusting the operation amount of the heat radiating section 2. To do.

  The heat release path 4 connects the lower part of the hot water tank 1 and the heat exchanger 2 a of the heat radiator 2, and supplies hot water from the lower part of the hot water tank 1 to the heat radiator 2. The heating outgoing path 5 connects the heat exchanger 2 a of the heat radiating unit 2 and the heat source unit 3, and supplies hot water flowing through the heat radiating unit 2 to the heat source unit 3. The heating return path 6 connects the heat source part 3 and the upper part of the hot water tank 1, and returns the hot water flowing through the heat source part 3 to the upper part of the hot water tank 1.

  The first temperature sensor 7 (heat dissipation path temperature detecting means) is a temperature sensor arranged in the heat dissipation path 4, detects the hot water temperature of the heat dissipation path 4, and transmits it to the heat radiating section control means 9. Hereinafter, the hot / cold water temperature of the heat release path 4 detected by the first temperature sensor 7 may be referred to as “Tin”.

  The second temperature sensor 8 (heating forward path temperature detection means) is a temperature sensor arranged in the heating forward path 5, detects the hot water temperature of the heating forward path 5, and transmits it to the heat radiating section control means 9. Hereinafter, the hot and cold water temperature of the heating outbound path 5 detected by the second temperature sensor 8 may be referred to as “Tout”.

  The heat radiating unit control means 9 receives the transmission of the hot water temperature Tin of the heat radiating path 4 and the hot water temperature Tout of the heating path 5 from the first temperature sensor 7 and the second temperature sensor 8, and based on the Tin and Tout, the heat radiating unit 2 To control. Specifically, the heat radiating section control means 9 starts and stops the heat radiating section 2 based on the hot water temperature (Tin) of the heat radiating path 4 and operates the heat radiating section 2 based on the hot water temperature (Tout) of the heating path 5. The operation amount adjustment control for adjusting the amount to the maximum operation amount or an intermediate operation amount smaller than the maximum operation amount is executed. Actually, a program corresponding to the heat radiating section control means 9 is stored in a ROM or a non-volatile memory (not shown), and the processes corresponding to the heat radiating section control means 9 are executed by loading them into the CPU. Is executed.

  Hereinafter, the operation control performed in the hot water storage type heat source cooling device 10 by the heat radiating unit control means 9 will be described with reference to the flowchart of FIG.

  When the operation control is started, in step # 201, it is determined whether or not the heat radiating unit 2 is stopped. When the heat radiating unit 2 is stopped (step # 201: Yes), the process proceeds to step # 202. When the heat radiating unit 2 is in operation (step # 201: No), the process proceeds to step # 204.

  In Step # 202, it is determined whether or not the hot water temperature (Tin) of the heat release path 4 is equal to or higher than a predetermined activation temperature. The starting temperature is a reference temperature (for example, 40 ° C.) for determining whether to start the heat radiating unit 2, and is determined in advance and stored in the heat radiating unit control means 9. If Tin is equal to or higher than the starting temperature (step # 202: Yes), the process proceeds to step # 203. When Tin is smaller than the starting temperature (step # 202: No), the process proceeds to the end.

  In step # 203, the heat radiating part control means 9 controls the heat radiating part 2, and starts the heat radiating part 2 with the maximum operation amount. Specifically, the heat radiating unit control means 9 operates the radiator fan 2b of the heat radiating unit 2 at the maximum rotational speed so that the heat radiated from the hot water in the heat radiating unit 2 becomes the maximum amount, and the bypass path 2c of the heat radiating unit 2 The flow rate of hot water is controlled to a minimum (for example, zero).

  That is, in the hot water storage type heat source cooling device 10, the heat radiating unit control means 9 activates the heat radiating unit 2 in a state where the operation amount is maximum when the hot water temperature (Tin) of the heat radiating forward path 4 is equal to or higher than a predetermined activation temperature. . When Tin is equal to or higher than the activation temperature, the temperature of the hot water stored in the hot water tank 1 is relatively high. Therefore, when the heat radiating unit 2 is activated and operates at the maximum operation amount, the heat radiated from the heat radiating unit 2 is obtained. Is performed, and the hot water is cooled.

  In step # 204, it is determined whether or not the hot water temperature (Tin) of the heat release path 4 has continued below a predetermined stop temperature for a predetermined time. The stop temperature and the predetermined time are a reference temperature (for example, 38 ° C.) and a reference time (for example, 5 minutes) for determining whether or not to stop the heat dissipating unit 2, and are determined in advance. It is stored in the control means 9. The stop temperature is a temperature lower than the above-described start temperature.

  When Tin continues below the stop temperature for a predetermined time or longer (step # 204: Yes), the process proceeds to step # 205. If Tin does not continue the stop temperature for a predetermined time or longer (step # 204: No), the process proceeds to step # 206.

  In step # 205, the heat radiating part control means 9 controls the heat radiating part 2 and stops the heat radiating part 2. Specifically, the heat radiating unit control means 9 stops the radiator fan 2b of the heat radiating unit 2 so that the heat radiating from the hot water in the heat radiating unit 2 stops or the flow rate of hot water in the bypass path 2c of the heat radiating unit 2 is reduced. The flow rate of hot water in the heat exchanger 2a is controlled to a minimum (for example, zero). Then go to the end.

  That is, in the hot water storage type heat source cooling device 10, the heat radiating section control means 9 is configured so that the hot water temperature (Tin) of the heat radiating forward path 4 is a predetermined temperature lower than the starting temperature (for example, 40 ° C.). C.) or less is continued for a predetermined time (for example, 5 minutes) or longer, the heat dissipating unit 2 is stopped. When Tin continues below the stop temperature for a predetermined time or more, the temperature of the hot water stored in the hot water tank 1 is relatively low. Therefore, when the heat dissipating part 2 is stopped, the heat dissipating from the heat dissipating part 2 stops. It is preferable because the temperature of the hot water rises.

  In step # 206, it is determined whether or not the operation amount adjustment control is stopped. Here, the operation amount adjustment control is control for adjusting the operation amount of the heat radiating unit 2 to the maximum operation amount or an intermediate operation amount smaller than the maximum operation amount, and the amount of heat radiation from the hot water in the heat radiating unit 2 is intermediate. It is control to adjust to the quantity. In the present embodiment, the operation amount adjustment control is started (step # 208) and stopped (step # 210) based on the hot water temperature (Tout) of the heating outbound path 5. A method of determining the operation amount of the heat radiation unit 2 in the operation amount adjustment control will be described later.

  When the operation amount adjustment control is stopped (step # 206: Yes), the process proceeds to step # 207. When the operation amount adjustment control is being executed (step # 206: No), the process proceeds to step # 209.

  In Step # 207, it is determined whether or not the hot water temperature (Tout) of the heating outbound path 5 is equal to or lower than the above-described control start temperature. The control start temperature is a reference temperature (for example, 36 ° C.) for determining whether to start the operation amount adjustment control, and is determined in advance and stored in the heat radiating unit control means 9. When Tout is equal to or lower than the control start temperature (step # 207: Yes), the process proceeds to step # 208. When Tout is larger than the control start temperature (step # 207: No), the process proceeds to the end.

  In step # 208, the operation amount adjustment control is started by the heat radiating unit control means 9, and then the process proceeds to the end.

  That is, in the hot water storage type heat source cooling device 10, the heat radiating section control means 9 is in a state where the operation amount adjustment control is not being executed (stopped), and the hot water temperature (Tout) of the heating path 5 is equal to or lower than a predetermined control start temperature. In this case, the operation amount adjustment control is started. When Tout is equal to or lower than the control start temperature, the temperature of the hot water flowing out from the heat radiating unit 2 is relatively low. Therefore, in order to adjust the temperature of the hot water with appropriate heat dissipation from the hot water in the heat radiating unit 2, The heat radiating part control means 9 starts the operation amount adjustment control.

  In Step # 209, it is determined whether or not the hot water temperature (Tout) of the heating outbound path 5 is equal to or higher than the control stop temperature. The control stop temperature is a reference temperature (for example, 40 ° C.) for determining whether or not to stop the operation amount adjustment control, and is determined in advance and stored in the heat radiating unit control means 9. The control stop temperature is a temperature higher than the above-described control start temperature.

  When Tout is equal to or higher than the control stop temperature (step # 209: Yes), the process proceeds to step # 210. When Tout is smaller than the control stop temperature (step # 209: No), the process proceeds to the end.

  In step # 210, the operation amount adjustment control is stopped by the heat radiating unit control means 9, and Tmax is changed to a predetermined value (for example, 43 ° C.). Tmax is a parameter used to determine the operation amount of the heat dissipating unit 2 in the operation amount adjustment control described later, and is the maximum value of the hot water temperature (Tout) in the heating outbound path during the previous operation amount adjustment control. The larger the Tmax, the larger the operation amount of the heat radiating unit 2 in the next operation amount adjustment control. In step # 210, Tmax is changed to a predetermined value, particularly a temperature (for example, 43 ° C.) higher than the control stop temperature (for example, 40 ° C.), so that the operation amount of the heat radiating unit 2 in the next operation amount adjustment control. As a result, the heat source unit 3 is appropriately cooled.

  In step # 211, the heat radiating unit control means 9 controls the heat radiating unit 2 to change the operation amount of the heat radiating unit 2 to the maximum operation amount. Specifically, the heat radiating unit control means 9 operates the radiator fan 2b of the heat radiating unit 2 at the maximum rotational speed so that the heat radiated from the hot water in the heat radiating unit 2 becomes the maximum amount, and the bypass path 2c of the heat radiating unit 2 The flow rate of hot water is controlled to a minimum (for example, zero). Then go to the end.

  That is, in the hot water storage type heat source cooling device 10, the heat radiating unit control means 9 is in a state where the operation amount adjustment control is being executed, and the hot water temperature (Tout) of the heating outbound path 5 is the control start temperature (for example, 36 ° C.). When the temperature is equal to or higher than a predetermined control stop temperature (for example, 40 ° C.), the operation amount adjustment control is stopped and the operation amount of the heat radiating unit 2 is maximized. When Tout is equal to or higher than the control stop temperature, the temperature of the hot water flowing out from the heat radiating unit 2 is relatively high, and cooling in the heat radiating unit 2 is insufficient. Therefore, it is preferable to maximize the amount of operation of the heat radiating unit 2 because the temperature of the hot water flowing out from the heat radiating unit 2 is lowered and the heat source unit 3 is appropriately cooled.

  Next, the operation amount adjustment control performed in the hot water storage type heat source cooling device 10 by the heat radiating unit control means 9 will be described with reference to the flowchart of FIG. The operation amount adjustment control is control for adjusting the operation amount of the heat dissipating unit 2 to the maximum operation amount or an intermediate operation amount smaller than the maximum operation amount as described above, and the amount of heat radiation from the hot water in the heat dissipating unit 2 is adjusted. This control is adjusted to an intermediate amount.

  When the operation amount adjustment control starts, in step # 301, it is determined whether or not the value of Tmax is zero. Here, Tmax is the maximum value of the hot water temperature (Tout) in the heating outbound path during the period of the operation amount adjustment control performed last time. When the hot water storage type heat source cooling device 10 is started, that is, in a state where the operation amount adjustment control is not yet performed, the value of Tmax is set to zero. Each time the operation amount adjustment control is performed, the heat radiating section control means 9 updates and stores the maximum value of the hot water temperature (Tout) of the heating outbound path during that period as the value of Tmax. Specifically, after performing step # 305 (changing the amount of operation of the heat dissipating unit 2) described later, the maximum value of Tout for 10 minutes after the lapse of 20 minutes is updated and stored as the value of Tmax. That is, the value of Tout when the heat radiating unit 2 is in a steady state is stored as Tmax. Tmax may be changed to a predetermined value in step # 210 described above.

  If Tmax ≠ 0 (step # 301: Yes), the process proceeds to step # 302. When Tmax is not 0 (step # 301: No), the process proceeds to step # 303.

In step # 302, the heat radiating unit control means 9 sets the operation amount of the heat radiating unit 2 based on the operation amount (previous operation amount) in the previous operation amount adjustment control and the value of Tmax. Specifically, the operation amount is set based on the following equation. The operation amount and the previous operation amount are expressed as a percentage with respect to the maximum operation amount of the heat radiating unit 2.

Operation amount = previous operation amount + control coefficient × (Tmax−target temperature) Equation (1)

  Here, the control coefficient is set by the heat radiating unit control means 9 to a value that is 1/5 of the measured feed water temperature. The water supply temperature is the temperature of water supplied from the water supply to the hot water storage type heat source cooling device 10 and fluctuates according to the temperature, season, climate, etc. in conjunction with the outside temperature. For example, when the feed water temperature is 10 ° C., the value of the control coefficient is 2.

  The lower the feed water temperature, the smaller the control coefficient. This is because the heat dissipating unit 2 according to the present embodiment is an air-cooled type that includes the heat exchanger 2a and the radiator fan 2b. When the feed water temperature is low, the temperature of the air also becomes low, and even when the operation amount is slightly corrected, the heat dissipation amount in the heat radiating unit 2 changes greatly. Therefore, a smaller control coefficient is desirable. Conversely, if the feed water temperature is high, the temperature of the air also increases, and the amount of heat released by the heat radiating unit 2 cannot be adjusted unless the amount of operation is greatly corrected. Therefore, a larger control coefficient is desirable. Therefore, the control coefficient is preferably configured to change with a positive correlation with the outside air temperature or the feed water temperature.

  The target temperature is a target value (for example, 38 ° C.) of the temperature of hot water flowing out from the heat radiating unit 2, is determined in advance according to the heat source unit 3 to be cooled, and is stored in the heat radiating unit control means 9.

  For example, if the value of Tmax in the previous operation amount adjustment control is 38 ° C. and is the same as the target value, the second term on the right side of the above equation (1) is zero, and the current operation amount is It becomes the same as the movement amount. That is, the previous operation amount adjustment control is appropriately performed, and Tout matches the target value, so that the current operation amount adjustment control is also performed with the same operation amount.

  For example, when the value of Tmax in the previous operation amount adjustment control is 41 ° C., the right side of Equation (1) is 2 × (41 ° C.−38 ° C.) = 6, and 6 points are added to the previous operation amount. A value is set as the current operation amount. For example, when the previous operation amount is 39%, the current operation amount is set to 45%. Thereby, the heat radiation part 2 operates with an operation amount larger than the previous operation amount adjustment control, the amount of heat radiation from the hot water is increased, and Tout approaches the target value, which is preferable.

  That is, in the hot water storage type heat source cooling device 10, the heat radiating unit control means 9 determines the operation amount of the heat radiating unit 2 in the operation amount adjustment control by the hot water temperature (Tout) of the heating outbound path 5 during the previous operation amount adjustment control. A value obtained by multiplying a deviation between the maximum value (Tmax) and a predetermined target temperature by a predetermined control coefficient is adjusted to a value added to the previous operation amount that is the operation amount in the previous operation amount adjustment control. .

  When the operation amount of the heat radiation unit 2 is set in step # 302, the process proceeds to step # 304.

  In step # 303, the heat radiating unit control means 9 sets the operation amount of the heat radiating unit 2 based on the water supply temperature. When the value of Tmax is zero, it is not appropriate to determine the operation amount based on the above-described equation (1), and therefore it is set based on the feed water temperature. For example, when the feed water temperature is less than 10 ° C., the operation amount of the heat radiating unit 2 is set to 50%. When the feed water temperature is 10 ° C. or higher and lower than 30 ° C., the operation amount of the heat radiating unit 2 is set to 75%. When the feed water temperature is 30 ° C. or higher, the operation amount of the heat radiating unit 2 is set to 100%. When the operation amount of the heat radiation unit 2 is set, the process proceeds to step # 304.

  That is, in the hot water storage type heat source cooling device 10, the heat radiating unit control means 9 radiates heat when the maximum value (Tmax) of the hot water temperature (Tout) of the heating forward path 5 in the previous operation amount adjustment control period is not set. The operation amount of the unit 2 is determined based on the feed water temperature.

  In step # 304, the heat radiating unit control means 9 corrects the set operation amount so that the operation amount of the heat radiating unit 2 is equal to or higher than the lower limit value. The lower limit value is determined according to the feed water temperature, for example. For example, when the feed water temperature is less than 10 ° C., the lower limit value is set to 10%. When the feed water temperature is 10 ° C. or higher and lower than 30 ° C., the lower limit value is set to 30%. When the feed water temperature is 30 ° C. or higher, the lower limit value is set to 50%. The heat radiating unit control means 9 compares the set operation amount with the lower limit value, and if the operation amount is smaller than the lower limit value, corrects the operation amount and changes it to a value equal to or higher than the lower limit value. Then, the process proceeds to step # 305.

  That is, in the hot water storage type heat source cooling device 10, the heat radiating unit control means 9 determines the lower limit value of the operation amount of the heat radiating unit 2 in the operation amount adjustment control based on the feed water temperature.

  In step # 305, the heat radiating unit control means 9 changes the operation amount of the heat radiating unit 2 to the operation amount set in the above step. Then go to the end.

(Other embodiments)
(1) In the above-described embodiment, Tmax is the maximum value of the hot water temperature (Tout) of the heating path in the period of the operation amount adjustment control performed last time, but this was changed and Tmax was performed last time. It is good also as an average value of the hot water temperature (Tout) of a heating going path in the period of operation amount adjustment control.

(2) In the above-described embodiment, the adjustment of the operation amount of the heat radiating unit 2 by the heat radiating unit control means 9 has been described as an example in which the rotation control of the radiator fan 2b and the flow rate control of the bypass passage 2c are performed. A configuration with only one is also possible. Moreover, it is also possible to control the duty ratio of driving of the radiator fan 2b instead of the rotation control of the radiator fan 2b.

(3) In the above-described embodiment, the heat radiating unit 2 has the bypass path 2c, but a configuration without the bypass path 2c is also possible.

  Note that the configurations disclosed in the above-described embodiments (including the other embodiments, the same applies hereinafter) can be applied in combination with the configurations disclosed in the other embodiments unless there is a contradiction. The embodiments disclosed in this specification are exemplifications, and the embodiments of the present invention are not limited thereto, and can be appropriately modified without departing from the object of the present invention.

P: Circulation pump 1: Hot water tank 2: Heat radiating section 2a: Heat exchanger 2b: Radiator fan 2c: Bypass path 3: Heat source section 4: Heat radiating path 5: Heating path 6: Heating return path 7: First temperature sensor (Temperature detection means for heat dissipation)
8: 2nd temperature sensor (heating outgoing path temperature detection means)
9: Heat radiating section control means 10: Hot water storage type heat source cooling device

Claims (9)

A circulation pump for circulating hot water, a hot water storage tank for storing hot water, a heat radiating part for radiating heat from the hot water, a heat source part for applying heat to the hot water, and heating,
A heat release path for supplying hot water in the lower part of the hot water tank to the heat radiating section;
A heating outbound path for supplying hot water flowing through the heat radiating section to the heat source section;
A heating return path for returning hot water flowing through the heat source part to the upper part of the hot water storage tank;
A heat-dissipation path temperature detecting means for detecting the hot water temperature of the heat-dissipation path;
A heating outbound temperature detecting means for detecting a hot water temperature in the heating outbound path;
A hot water storage type heat source cooling device provided with a heat radiation part control means for controlling the operation of the heat radiation part,
The heat radiating part control means includes:
Based on the hot water temperature of the heat dissipation path, the heat dissipation unit is activated,
Based on the hot water temperature of the heating outbound path, the operation amount adjustment control for adjusting the operation amount of the heat radiating unit to the maximum operation amount or an intermediate operation amount smaller than the maximum operation amount is performed,
A hot water storage type heat source cooling device that stops the heat radiating unit based on a hot water temperature in the heat radiation path. The heat radiating part control means includes:
When the hot water temperature of the heat release path is equal to or higher than a predetermined start temperature, the heat dissipating part is started in a state where the operation amount is maximum,
The hot water storage type heat source cooling device according to claim 1, wherein the heat radiating unit is stopped when a hot water temperature in the heat radiating path continues below a stop temperature lower than the start temperature for a predetermined time. In the state where the heat radiating unit is activated, the heat radiating unit control means
In a state where the operation amount adjustment control is not executed and the hot water temperature of the heating outbound path is equal to or lower than a predetermined control start temperature, the operation amount adjustment control is started.
Execution of the operation amount adjustment control when the operation amount adjustment control is being executed and the hot water temperature in the heating outbound path is equal to or higher than a predetermined control stop temperature that is higher than the control start temperature. The hot water storage type heat source cooling device according to claim 1 or 2, wherein the operation amount of the heat radiating portion is stopped to a maximum state. In the operation amount adjustment control, the heat radiating unit control means
The amount of operation of the heat radiating unit is multiplied by a predetermined control coefficient for the deviation between the average value or maximum value of the hot water temperature of the heating outbound path and the predetermined target temperature in the period of the previous operation amount adjustment control. The hot water storage type heat source cooling device according to any one of claims 1 to 3, wherein the value is adjusted to a value added to a previous operation amount that is an operation amount in the previous operation amount adjustment control.   The hot water storage type heat source cooling device according to claim 4, wherein the heat radiating unit control means determines a value of the control coefficient based on a water supply temperature.   The heat radiating unit control means determines the operation amount of the heat radiating unit based on the water supply temperature when the average value or the maximum value of the hot water temperature of the heating outbound path in the period of the previous operation amount adjustment control is not set. The hot water storage type heat source cooling device according to claim 4 or 5 to be determined.   The hot water storage type heat source cooling device according to any one of claims 1 to 6, wherein the heat radiating unit control means determines a lower limit value of an operation amount in the operation amount adjustment control based on a water supply temperature. The heat radiating section includes a heat exchanger through which hot water flows and a radiator fan that air-cools the heat exchanger.
The heat radiating unit control means adjusts the operation amount of the heat radiating unit by controlling the number of revolutions of the radiator fan or controlling the duty ratio of driving the radiator fan. The hot water storage type heat source cooling device described. The heat dissipating unit includes a heat exchanger through which hot water flows, a radiator fan that air-cools the heat exchanger, and a bypass that bypasses the heat exchanger,
The hot water storage type heat source cooling device according to any one of claims 1 to 7, wherein the heat radiating unit control means adjusts an operation amount of the heat radiating unit by controlling a flow rate of hot water to the bypass passage.

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