JP4447259B2 - Heating system - Google Patents

Description

  The present invention relates to a heating apparatus that warms a room using a heat transfer liquid such as hot water.

  2. Description of the Related Art Conventionally, there is known a heating apparatus that warms a room using a heat transfer liquid such as warm water or antifreeze. Such a heating device includes a circulation path through which the heat medium liquid circulates, a radiator that warms the room by heat dissipation of the heat medium liquid, heating means that consumes electric power to heat the heat medium liquid, and stores the heat medium liquid to store heat. (For example, refer to Patent Document 1).

  Here, in recent years, in order to save power, for example, a service has been provided that discounts the power charge when the use of the power of the dedicated power line is stopped for a certain period of time in a certain time zone such as a peak time of power consumption. . For example, the hot time 19.22 eco provided by Hokkaido Electric Power Co., Ltd. corresponds to this. The hot time 19/22 eco is a power line for melting snow, but it can also be used for a heating device.

  Therefore, by connecting at least the heating means of the heating device to such a dedicated power line, a discount on the power charge can be applied to the heating device. However, when the operation of the heating means is stopped for a long time, there is a problem that the temperature of the heat transfer fluid flowing through the circulation path is significantly lowered and the amount of heat released from the radiator is significantly reduced.

For this reason, conventionally, the operation of the heating means, etc. is performed by storing in advance in the hot water storage tank provided in the heating device so that the amount of heat released from the radiator will not be significantly reduced even if the operation of the heating means is stopped for a certain period of time. The required heat radiation amount can be obtained from the radiator even during a certain period of stoppage. However, when a hot water storage tank is provided in the heating device, there is a problem that the manufacturing cost of the heating device is too high.
Japanese Examined Patent Publication No. 03-59341 (page 2-3, FIG. 1)

  The present invention has been made in view of the above background, and corresponds to a service in which the electricity charge is discounted when the use of the power of the dedicated power line is stopped for a certain period of time without providing a hot water storage tank. An object is to provide a heating device.

  In order to achieve the above object, the heating device of the present invention comprises a circulation path through which the heat transfer fluid circulates, a temperature setting means for setting the temperature of the heat transfer fluid, and a temperature set by the temperature setting means. Until in the heating device consisting of a heating means that consumes power to heat and a radiator that warms the room by heat dissipation of the heat transfer fluid, the heating means is when the use of power is stopped for a certain period of time, It is connected to a dedicated power line with a discounted power charge, and during the time period, the heating means is alternately operated and stopped, and before entering the time period, the temperature of the heat transfer fluid is set by the temperature setting means. The heating means is controlled so as to rise to a second set temperature higher than the first set temperature, and the temperature of the heat transfer liquid rises above the first set temperature during operation of the heating means in the time zone. Heating means to allow Control for controlling the operation and stop of the heating means according to the time interval between the operation and stop of the heating means determined so that the sum of the operation stop time of the heating means becomes the predetermined time in the time zone Means are provided.

  According to this configuration, since the heating medium liquid is heated to the second set temperature higher than the first set temperature set by the temperature setting means before entering the time zone, the time Even if the operation of the heating means is stopped after entering the belt, the heat radiation amount of the radiator can be maintained to some extent. In addition, since the heating means is alternately operated and stopped after entering the time zone, the temperature of the heat transfer fluid flowing through the circulation path without providing the hot water tank is determined by the control means. Can be raised. In addition, since the temperature of the heat transfer fluid can be raised to the first set temperature or higher during the operation of the heating means, it is possible to suppress as much as possible the decrease in the heat radiation amount of the radiator when the heating means is stopped. In addition, since the time interval is determined by the control means so that the total of the operation stop time of the heating means is the fixed time necessary for applying the discount of the power charge in the time period, You can get a discount on electricity charges.

  An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic diagram showing the configuration of the heating device of this embodiment, and FIG. 2 is a graph showing time intervals and temperature changes.

As shown in FIG. 1, the heating device 1 of the present embodiment includes a circulation path 2 through which a heat medium liquid such as hot water and antifreeze liquid circulates by a pump P ₁ , and an operation as a temperature setting unit that sets the temperature of the heat medium liquid. It consists of the part 3, the heat pump 4 as a heating means, and the heat radiator 5 which warms the room | chamber interior by thermal radiation of a heat-medium liquid. The heat pump 4 includes an evaporator 41, a compressor 42, a condenser 43, an expansion valve 44, and control means 45 that controls the operation of the compressor 42. The components of these heat pumps 4 are pipes through which refrigerant flows from the evaporator 41 to the compressor 42, from the compressor 42 to the condenser 43, from the condenser 43 to the expansion valve 44, and from the expansion valve 44 to the evaporator 41. Connected by a path 46.

  Moreover, only the compressor 42 and the control means 45 are the components of the heat pump 4 that consume power. The compressor 42 is connected to a dedicated power line for which a discount service is provided. Further, the control means 45 needs to be always supplied with power in order to control the operation of the compressor 42. For this reason, the control means 45 of this embodiment is connected to the normal electric power line. When the control means 45 is also connected to the dedicated power line, the heating device 1 is provided with power storage means, stores power when the compressor 42 is in operation, and supplies power to the control means 45 from the power storage means when the compressor 42 is stopped. I will respond.

  The operation of the heat pump 4 is already well known, but will be briefly described here.

Heat pump 4 of the present embodiment is to utilize geothermal heat circuit 6 for circulating a heat medium is heated by geothermal heat by the pump P ₂ as a heat source. In the heat pump 4, the refrigerant flowing through the pipe 46 absorbs underground heat by the evaporator 41, evaporates and vaporizes, and becomes low-temperature and low-pressure refrigerant vapor. The low-temperature and low-pressure refrigerant vapor is compressed into high-temperature and high-pressure refrigerant vapor by the compressor 42, dissipates heat in the condenser 43, and is condensed and liquefied. The condensed and liquefied refrigerant is decompressed and expanded by the expansion valve 44 to become a low-temperature and low-pressure refrigerant. Then, the heat is again absorbed by the evaporator 41 to evaporate and vaporize to become low-temperature and low-pressure refrigerant vapor.

  Next, the operation of the heating device 1 in the present embodiment will be described. Here, for example, in the case of 5 hours from 4 pm to 9 pm, when the time when the power is not used is 2 hours, a service to which a discount on the power charge is applied is provided. Explain that it is.

  As shown in the graph of FIG. 2, assuming that the set temperature of the heat transfer fluid necessary for obtaining the room temperature set by the operation unit 3 is the first set temperature, and this is 35 ° C., the control means 45 The second set temperature is set to 40 ° C., for example, so that the heat radiation amount of the radiator 5 can be maintained to some extent even when the operation of the compressor 42 is stopped from 4 pm. Then, the control means 45 switches the set temperature of the heat transfer fluid from the first set temperature to the second set temperature at 3:30 pm so that the temperature of the heat transfer fluid becomes 40 ° C. by 4 pm. The operation of the compressor 42 is controlled.

  Next, the control means 45 determines the time interval between the operation time and the stop time of the compressor 42. For example, the user manually inputs a time period from 4 pm to 9 pm when the discount service is provided, and 2 hours (a fixed time) as a stop time necessary for the discount to be applied. . Then, the control means 45 divides the inputted 2 hours, which is a fixed time, into a plurality of time intervals, for example, every 20 minutes, and determines the time intervals as a total of 6 stops. Moreover, if 2 hours which are fixed time are subtracted from 5 hours from 4:00 pm to 9:00 pm, the rest is 3 hours. If 3 hours are divided by 5 times, which is one less than, for example, 6 times of the stop time interval, one time is 36 minutes. And the control means 45 determines the time interval of a total of 5 times as an operation time interval for every 36 minutes obtained. In this way, the control means 45 controls the compressor 42 so as to alternately perform 36 minutes, which is the determined operation interval of the compressor 42, and 20 minutes, which is the stop time interval.

  More specifically, the control means stops the operation of the compressor 42 for 20 minutes at 4:00:00. The operation of the compressor 42 is resumed from 4:20 to 4:56. Similarly, the operation and the stop are alternately performed. Then, when the control means 45 reaches 9:00 and the total stop time of the compressor 42 reaches 2 hours, the normal operation of the compressor 42 is resumed, and the temperature of the heat transfer liquid is changed to the first temperature. It is controlled to 35 ° C., which is the set temperature.

  The heating device 1 of the present embodiment obtains the room temperature set by the operation unit 3 as temperature setting means before entering the time zone from 4 pm to 9 pm to which the discount of the power charge is applied. Therefore, the heating medium liquid is heated by raising the temperature to a second setting temperature of 40 ° C., which is higher than the first setting temperature of 35 ° C., which is the temperature of the heating medium liquid required. For this reason, even if it enters into this time slot | zone and the driving | operation of the compressor 42 as a heating means is stopped, the thermal radiation amount of the heat radiator 5 can be maintained to some extent. In addition, since the operation time 36 minutes and the stop time 20 minutes of the compressor 42 are alternately performed after entering the time zone, the temperature of the heat transfer fluid flowing through the circulation path 2 can be set without providing a hot water tank. Since the compressor 42 is operated and raised for 36 minutes after being stopped for 20 minutes and can be raised to 35 ° C. or higher, it is possible to suppress as much as possible a decrease in the heat radiation amount of the radiator 5 when the compressor 42 is stopped. . Further, the control unit 45 causes the time interval to be about the operation time so that the total stop time of the compressor 42 of the heat pump 4 is 2 hours necessary for applying the discount of the electric power charge in the time period. Since the stop time is controlled to 36 minutes and 20 minutes, it is possible to reliably receive a discount on the power charge.

  In the heating device 1 of the present embodiment, the control means 45 controls the time interval between the operation and stop of the compressor 42 of the heat pump 4 as the heating means to be 36 minutes and 20 minutes that do not always change, thereby making a comparison. A stable temperature of the heat transfer fluid can be obtained. However, the time interval between the operation and stop of the heating means may be changed in accordance with the change in the heat dissipation amount of the radiator 5 in the time zone to which the discount service is applied.

  For example, in the evening, from 4 pm to 5 pm, it is assumed that the heat dissipating amount of the radiator 5 is relatively small, and the temperature drop of the heat transfer fluid is gradual. On the contrary, it is assumed that the heat radiation amount of the radiator 5 is relatively large from 8:00 pm to 9:00 pm at night, and the temperature of the heat transfer fluid is rapidly decreased. At this time, the control means 45 takes a larger ratio of the stop time interval between 4:00 pm and 5:00 pm in the evening as compared with the time interval of operation of the compressor 42, and from 8:00 pm to 9:00 pm The time interval may be controlled so that the operation time interval can be made larger than the time interval when the compressor 42 is stopped when the cooling has occurred. Thereby, even if the thermal radiation amount of the heat radiator 5 fluctuates, the temperature of the heat transfer fluid can be maintained as much as possible.

  Further, in the present embodiment, the control unit 45 determines the time interval between the operation and stop of the compressor 42 based on the time zone input by the user's manual input and a certain time, When the time zone and the fixed time are known in advance, the control means 45 stores the time zone, the fixed time, and the time interval in advance, and the operation and stop of the compressor 42 based on the stored data. The time interval may be determined. Thereby, a user's manual input operation | work can be abbreviate | omitted.

The schematic diagram which shows the structure of the heating apparatus of this embodiment. The graph which shows a time interval and a temperature change.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Heating apparatus, 2 ... Circulation path, 3 ... Operation part, 4 ... Heat pump, 41 ... Evaporator, 42 ... Compressor, 43 ... Condenser, 44 ... Expansion valve, 45 ... Control means, 46 ... Pipe line, 5 ... radiator, 6 ... underground heat circuit.

Claims (1)

A circulation path through which the heat transfer fluid circulates, a temperature setting means for setting the temperature of the heat transfer fluid, a heating means for consuming and heating the heat transfer fluid to a temperature set by the temperature setting means, and heat In a heating device consisting of a radiator that heats the room by heat dissipation of the liquid medium,
The heating means is connected to a dedicated power line where the electricity charge is discounted when the use of power is stopped for a certain period of time in a certain time zone,
In the time zone, the heating means is alternately operated and stopped, and before entering the time zone, the temperature of the heat transfer liquid is set to a second setting higher than the first set temperature set by the temperature setting means. Controlling the heating means to increase the temperature, and controlling the heating means to allow the temperature of the heat transfer fluid to rise above the first set temperature during operation of the heating means in the time period, And a control means for controlling the operation and stop of the heating means according to the time interval between the operation and the stop of the heating means determined so that the sum of the operation stop times of the heating means becomes the predetermined time in the time zone. A heating device characterized by.

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