JPS6172960A - Heat collecting device - Google Patents

Abstract

PURPOSE:To obtain the hot-water of objective heat-up temperature substantially every day at an objective heat-up time by a method wherein a fluid temperature in a hot-water reserving tank upon starting operation is detected and an objective heating capacity is operated from a temperature difference between the detected temperature and the objective heat-up temperature and a heat collecting time from the starting of the operation to the objective heat-up time. CONSTITUTION:The inlet and outlet temperature of a liquid heater 8 are being inputted into a main control circuit 13A from first and second temperature detectors 11, 12 and the heating capacity is being detected at all times in the main control circuit 13A by employing a temperature difference between them and a preset amount of flow of water. The objective heating capacity is operated in the control circuit 13 by the temperature difference between the fluid temperature in the hot-water reserving tank upon starting the operation, which is detected by the third temperature detector 15, and the objective heat-up temperature and the heat collecting time from the starting time of operation to the objective heat-up time while the objective heating capacity, thus operated, is memorized in the main control circuit 13A. The revolving number of a compressor 1 is controlled in accordance with the change of atmospheric condition so as to obtain the objective heating capacity being memorized in the main control circuit 13A.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a heat pump type heat collecting device that uses solar heat and air heat as heat sources.

Conventional technology> Conventionally, in a heat collection device using solar heat or air heat as a heat source using a heat pump, a method for controlling the capacity of the compressor is to detect the outside temperature and increase the rotation speed of the compressor as the outside temperature increases. Methods are being considered to control this so that it becomes lower. This method is effective for reducing the power consumption of the compressor and improving the build-up coefficient of the equipment, but since the heating capacity is affected by outside air conditions, it may not reach the target boiling temperature, or the hot water may not reach the target boiling temperature. There may be cases where boiling is not completed even in the evening when the amount of water used is high.
This was inconvenient in terms of access to hot water.

<Purpose> In view of the above, the present invention aims to provide a solar heat/air heat collecting device that makes it possible to reliably use hot water at a target boiling temperature at a target boiling time.

<Embodiment> Hereinafter, an embodiment of the present invention will be explained based on FIG. One side is connected to the condenser 2 via the expansion device 3, and the other side is connected to the compressor (2).
A heat collection circuit 5 is constituted by a heat collector 4 connected to the heat collector 4, a hot water storage tank 6 for storing the fluid to be used, and a circulation pump 7 disposed outside the hot water storage tank 6 to exchange heat with the condenser 2. In the heat collecting device in which the fluid heating circuit 9 is formed by 11 dimensions by connecting the related working fluid heaters 8 to each other, the compressor 1 is deformed by 8 degrees and the IICIC thermal heater The population is provided with a first temperature detector 11 and the fluid jllJ4
A second temperature detector 12 is provided at the outlet of the W vessel 8, and a plurality of third temperature detectors 15 are provided for detecting the temperature of the fluid in the hot water tank 6 at the start of operation. , the pressure NIP is determined by the output signals of the third temperature detectors 11, 12.15.
A control circuit 13 is provided to control the capacity of the hot water tank 21, and the control circuit 13 detects the fluid temperature in the hot water tank at the start of operation from the output signal of the third temperature detector 15, and compares the detected temperature with the target boiling temperature. The target heating capacity is calculated based on the difference in temperature from the heating temperature and the heat collection operation time from the start of operation to the target boiling time, and the temperature detected by the first and second temperature detectors 11 and 12 is calculated. The heating capacity of the heat collecting circuit 5 is calculated based on the temperature, and a capacity control signal is output to the compressor 1 so that the heating capacity becomes the target heating capacity.

In the figure, the heat collector 4 is made up of a vibrator 41 equipped with black-painted fins, and is capable of collecting solar heat and air heat. Further, the rotation speed of the pressure 1 is made variable by a frequency conversion circuit 14. Further, as the restricting device r113, an Ikj5 tension valve which is ffi operated by a stepping motor is used. The expansion valve 3 controls the flow rate of the heat medium using a temperature sensor (not shown) installed at the entrance and exit of the heat collector 4 so that the heat collector 4 can collect heat under optimal conditions.

On the other hand, a fluid heating circuit, a hot water storage tank 6, a circulation pump 7, a fluid heater 8, and a hot water storage tank m6 are connected in sequence. The condenser 2 and the fluid heater 8 are held in a heat exchange relationship, forming, for example, a double snow structure heat exchanger 10. The control circuit 13 calculates the heating capacity from the inspection temperature difference between the setter 13B that sets the target boiling temperature and the target boiling time, and the first and second temperature detectors 11.12. A main control circuit 13A outputs a control signal according to the target heating capacity calculated by the setting device 13B and the third temperature detector 15, and the pressure! is determined based on the output signal of the main control circuit 13A. ii) and a frequency conversion circuit 14 which outputs an operating frequency signal.

+if The owner/keeper control circuit 13A is, for example, a general one-chip microcomputer, which has internal data RAM, program ROM, ΔLU, etc., and is driven by a clock oscillation circuit. Further, the frequency conversion circuit 14 is, for example, an inverter circuit, and outputs a signal for converting the three-phase AC power frequency of the pressure M6 rock electric motor 2. Further, the temperature inspection device i1, 12.15 uses, for example, a thermistor, and the voltage drop detected by the thermistor due to a temperature change is converted into a digital value and inputted to the main control circuit 13A.

Note that the target heating capacity can be determined as follows.

In other words, the target heating capacity is determined by the difference between the fluid temperature (water temperature) in the hot water tank at the start of operation and the target boiling temperature, the heating load that can be calculated from the hot water tank capacity, the experiment start time, and the target boiling time. Calculated from the heat collection operation time, which is the difference between

Heating load = (Target boiling temperature - Fluid temperature in the hot water storage tank at the start of operation) x Hot water storage! The heat collection effect is explained in terms of: 1 capacity/day heating capacity = heating load/heat collection operation time. The high-temperature, high-pressure heating medium gas compressed by the compressor 1 flows into the condenser 2, exchanges heat with the fluid (water) flowing through the fluid heater 8, which has a heat exchange relationship, condenses and liquefies, and reaches the expansion valve 3. When passing through the expansion valve 3, the heat medium undergoes adiabatic expansion and is depressurized, becoming a low-temperature, low-pressure unevaporated heat medium. The heat medium then flows into the heat collector 4, absorbs solar heat and air heat, becomes gasified, and returns to a pressure of 1 rl.
The water in the force meter hot water tank 6 is sent to the fluid heater 8 by the circulation pump 7, heated and heated, and then flows into the hot water storage tank 6.

At this time, the temperatures at the inlet and outlet of the fluid heater 8 are input to the main control circuit 13A from the first and second temperature detectors 11.12, and the main control circuit 13A adjusts the temperature difference between them to a constant value in advance. The heating FIB force is constantly detected based on the set water flow rate. Then, the control circuit is based on the temperature difference between the fluid temperature in the hot water tank at the start of operation and the target boiling temperature detected by the third temperature detector 15, and the heat collection operation time from the start of operation to the target boiling time. At step 13, the target heating capacity is calculated using the method described above and stored in the main control circuit 13A.

Then, the rotation speed of the compressor 1 is controlled according to changes in outside air conditions so as to achieve the target heating capacity stored in the main control circuit 13A. That is, if the amount of heat collected by the heat collector 4 increases due to solar radiation, outside temperature, etc., increasing the amount of heat collected by the heat collector 4, the rotation speed of the compressor t'; Driving with a coefficient of performance.

In addition, when solar radiation, outside temperature, etc. are low, the rotation speed of Narebo compressor 1 is increased to increase the work of compression [1, and the operation is performed so that the target heating capacity is obtained. As shown in the figure.

<Effects> As is clear from the above description, the present invention includes a compressor that compresses and discharges a heat medium, and a condenser connected to the discharge side of the compressor. A heat collection circuit is installed from the A heater and the JA heater, which is connected to the condenser on one side and the compressor on the other side via a throttle device, and is used as a storage tank for storing the used fluid. , outside the hot water bath! 1; In a heat collecting device in which a fluid heating circuit is configured by connecting a condenser 411 and a fluid heater in a heat exchange relationship with each other, the compressor is of a variable capacity type, and the fluid heater A first temperature sensor is provided at the outlet of the fluid heater, a second temperature sensor is provided at the outlet of the fluid heater, a third temperature sensor is provided for detecting the temperature of the fluid in the hot water storage tank, and a third temperature sensor is provided at the outlet of the fluid heater; -1 A control circuit is provided that controls the capacity of the compressor based on the output signals of the second and third temperature detectors, and the control circuit controls the capacity of the hot water storage tank at the start of operation based on the output signals of the third temperature detector. detects the fluid temperature of the fluid, and calculates the line-of-sight heating capacity from the temperature difference between the detected temperature and the target boiling temperature and the opening of the rvf in the heat collection operation from the start of operation to the target boiling time; , is configured to calculate the heating capacity of the heat collection circuit from the temperature detected by the second temperature detector and output a capacity control signal to the compressor so that the heating capacity becomes the target heating capacity. It's ours.

Therefore, according to the present invention, the fluid temperature in the hot water storage tank at the start of operation can be detected by the third temperature detector, and the temperature difference between the detected temperature and the target boiling temperature, and the target boiling temperature from the start of &'IIA IJil. The target heating capacity can be detected from the heat collection operation time up to the time, and the compressor can be controlled by the signals from the first and second temperature detectors, so that hot water at the target boiling temperature is delivered every day at the target boiling time. Furthermore, when solar radiation, outside temperature, etc. are high, the target heating capacity can be reduced to reduce the burden on the pressure rock, making economical operation possible.

[Brief explanation of the drawing]

Fig. fIS1 is a configuration diagram of a solar heat/air heat collector showing an embodiment of the present invention, and Fig. 2 is a control 70-chart of the same. 1: Pressure blue ivy, 2: Condenser, 3: Squeezing device, 4: Heat collector, 5: Heat collection circuit, 6: Hot water storage tank, 7: Circulation pump, 8: Heater, 9: Heating circuit, 10: Heat exchanger, 11.12: Temperature detector, 13: Control circuit, 15: Third temperature detector.

Claims (1)

[Claims] A compressor that compresses and discharges a heat medium, a condenser connected to the discharge side of the compressor, and a heat collector connected on one side to the condenser via a throttling device and on the other side connected to the compressor. A fluid heating circuit was constructed by connecting a hot water storage tank for storing a working fluid and a working fluid heater having a heat exchange relationship with the condenser outside the hot water storage tank. In the heat collection device, the compressor is of variable capacity type, a first temperature sensor is provided at the inlet of the fluid heater, a second temperature sensor is provided at the outlet of the fluid heater, and the compressor is of a variable capacity type, and a second temperature sensor is provided at the outlet of the fluid heater. A third temperature detector is provided to detect the temperature of the fluid in the compressor, and a control circuit is provided to control the capacity of the compressor based on the output signals of the first, second, and third temperature detectors, and the control circuit detects the fluid temperature in the hot water storage tank at the start of operation from the output signal of the third temperature sensor, and calculates the temperature difference between the detected temperature and the target boiling temperature and the temperature from the start of operation to the target boiling time. The target heating capacity is calculated from the heat collection operation time, and the heating capacity of the heat collection circuit is calculated from the temperatures detected by the first and second temperature detectors, and the heating capacity is determined as the target heating capacity. A heat collecting device configured to output a capacity control signal to the compressor so that the following is achieved.