JPS6172961A - Heat collecting device - Google Patents

Abstract

PURPOSE:To permit to obtain the hot-water of objective heat-up temperature at an objective heat-up time every day by a method wherein a present fluid temperature in a hot-water reserving tank is detected to operate an objective heating capacity from the temperature difference between the detected temperature and the objective heat-up temperature and a remaining heat collecting time from present time to the heat-up time. CONSTITUTION:The inlet and outlet temperatures of a fluid heater 8 are being inputted into a main control circuit 13A from first and second temperature detectors 11, 12 while the objective heating capacity is operated in a control circuit 13 by a present average water temperature in the hot-water reserving tank, detected by the third temperature detector 15 wherein a heating capacity is being detected at all times by employing the detected temperature difference and a preset amount of flow of water, the objective heat-up temperature, the objective heat-up time and the present time to memorize it into the main control circuit 13A. The revolving number of a compressor 1 is controlled in accordance with the change in atmospheric condition as well as the supply of hot-water during collecting heat so as to obtain the objective heating capacity 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 collecting device using solar heat or air heat as a heat source using a heat pump, a method for controlling the capacity during compression 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 coefficient of performance of the equipment, but because the heating capacity is affected by outside air conditions, it may not reach the target boiling temperature, and the hot water may not reach the target boiling temperature. Even in the evening when the amount of hot water used is high, there are cases where the boiling process is not completed, which is inconvenient from the point of view of using the 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.

<Example> An example of the present invention will be described below with reference to Fig. 1.2. A heat collecting circuit 5 is constituted by a condenser 2, which is connected to the condenser 2 on one side via a throttle device 3, and a heat collector 4 whose other side is connected to the compressor 1,
A fluid heating circuit 9 is formed by connecting a hot water storage tank 6 for storing a fluid to be used and a fluid heater 8 disposed outside the hot water storage tank 6 via a circulation pump 7 and having a heat exchange relationship with the condenser 2 to form a fluid heating circuit 9. In the constructed heat collecting device, the compressor 1 is of a variable capacity type, and the first temperature sensor 1 is connected to the inlet of the fluid heater 8.
1, a second temperature sensor 12 is provided at the outlet of the driftwood heater 8, a third temperature sensor IS is provided for detecting the temperature of the fluid in the hot water tank 6, A control circuit 13 is provided which controls the capacity of the compression (1) according to the output signals of the three temperature detectors 11, 12. The current temperature of the fluid in the tank is detected, and the target heating capacity is demonstrated based on the temperature difference between the detected temperature and the target boiling temperature, and the remaining heat collection time from the current time to the boiling time. The heating capacity of the heat collecting circuit 5 is calculated from the temperatures detected by the first and second temperature detectors 11 and 12, and the compression It is configured to output a capacity control signal to the

In FIG. 1, the heat collector 4 is composed of a vibrator equipped with black-painted fins, and is capable of collecting solar heat and air heat. Further, the rotation speed of the compressor 1 is made variable by a frequency conversion circuit 14. An expansion valve driven by a stepping motor is used as the expansion device 3. An installed temperature sensor (not shown) controls the flow rate of the heat medium so that the heat collector 4 collects heat under optimal conditions.

On the other hand, the fluid heating circuit 9 includes a hot water storage P16, a circulation pump 7,
A fluid heater 8 and a hot water storage tank 6 are connected in sequence. The condenser 2 and the fluid heater 8 are held in a heat exchange relationship, forming, for example, a double tube heat exchanger 10. The control circuit 13 calculates the heating capacity from the setter JOB that sets the target boiling temperature and the target boiling time, and the temperature difference detected from 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 compression (; and a frequency conversion circuit 14 that outputs an operating frequency signal.

The main control circuit 13A is, for example, a general one-chip microcombiator, which has internal data RAM, program ROM, ALU, 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 frequency of the Sanwa Mata power source of the electric rock. For example, a thermistor is used, and a voltage drop due to a temperature change detected by the thermistor is converted into a digital value and input to the main control circuit 13A.

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

In other words, is the target heating capacity based on current storage? It is calculated from the heating load, which can be calculated from the capacity of the eight tanks, and the remaining heat collection time, which is the difference between the current time and the target boiling time.

Heating load = (Target boiling temperature - Current average fluid temperature in the hot water storage tank) x Hot water storage tank capacity Target heating capacity = Heating load / Remaining heat collection time Next, heat collection ('l
Describe the river. Pressure, 111j (><1) The high-temperature, high-pressure heat medium flows into the condenser 2, exchanges heat with the fluid (water) flowing through the fluid heater 8, which has a two-heat exchange relationship, and condenses. It liquefies and reaches the expansion valve 3, and as it passes through the shin tension valve 3, it undergoes adiabatic expansion and is depressurized, becoming an unevaporated heat medium at a low temperature (pressure).The heat medium then flows into the heat collector 4 and absorbs solar heat. -The air heat is absorbed and gasified, and then enters the compressor 1 again to repeat the above cycle.-
The water in the force meter hot water tank 6 is sent to the fluid heater 8 by the circulation pump 7, and flows into the hot water storage tank 6 after being heated to a higher temperature.

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. The heating capacity is constantly detected using a constant water flow rate. Then, the control circuit 13 calculates the target heating capacity using the method described above from the current average water temperature in the hot water storage tank detected by the third temperature detector 15, the target boiling temperature, the target boiling time, and the current time. and stored in the main control circuit 13A.

Then, the target heating fi stored in the main 1i control circuit 13A
The rotational speed of the pressure fi comparison 1 is controlled in accordance with changes in the outside air 1' and the hot water supply during heat collection so that the temperature is low. In other words, 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, compression (reducing the rotation speed of 1/1 and compressing (lowering the amount of work of 1, that is, the power consumption) Operate at a high 7/coefficient of performance.Also, when sunlight, outside temperature, etc. are low, the compressor speed is increased to increase the amount of work of the compressor, and the compressor is operated to achieve the target heating capacity.

Furthermore, when hot water is supplied during heat collection, low-temperature city water or water is supplied into the hot water storage tank, so the water temperature in the hot water storage tank is (℃).As the heating load increases, the rotation speed of compressor 2 is increased. Thermal capacity can be increased.A flowchart of the control is shown in FIG.

<Effects> As is clear from the above description, the present invention has a compressor for compressing and discharging a heat medium, a condenser connected to the discharge side of the compressor, and a condenser connected to the discharge side of the compressor, and a A heat collection circuit is constituted by a heat collector connected to the condenser and whose A trace side is connected to the compressor, and a storage tank for storing the fluid to be used, and a heat exchanger with the condenser outside the hot water storage tank. In a heat collecting device in which a fluid heating circuit is configured by connecting a fluid heater to be used, the compressor is of a variable capacity type, and a first temperature detector is provided at the inlet of the fluid heater. A second temperature sensor is provided at the outlet of the fluid heater, and a third temperature sensor is provided for detecting the temperature of the fluid in the hot water tank, and the output signals of the first and third temperature sensors determine the temperature of the fluid. A control circuit is provided to control the capacity of the compressor, and the control circuit detects the current fluid temperature in the hot water storage tank from the output signal of the third temperature sensor, and calculates the difference between the detected temperature and the target boiling temperature. The target heating capacity is calculated from the temperature difference and the remaining heat collection time from the current time to the boiling time, and the heating capacity of the heat collection circuit is calculated from the temperature detected by the first and second temperature detectors. The heating capacity is calculated and a capacity control signal is output to the pressure line so that the heating capacity becomes the line-of-sight heating capacity.

Therefore, according to the present invention, the current temperature of the fluid in the hot water storage tank can be detected by the third temperature detector, and the target heating capacity can be constantly adjusted from the current time to the target boiling temperature and the 11-vote boiling time. The compressor can be controlled by reducing the target heating capacity when water at the target boiling temperature is obtained every day at the target boiling time, and when the sunlight and outside temperature are high. This reduces the burden on the vehicle and enables economical operation.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a solar/air heating field dual heating device showing an embodiment of the present invention, and FIG. 2 is a control flowchart of the same. 1: Compression (Peng 2: Condenser, 3: Throttle device, 4: Heat collector,
°S: heat collection circuit, 6: hot water storage tank, 7: circulation pump, 8: heater, 9: heating circuit, 1(): 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 current fluid temperature in the hot water storage tank from the output signal of the third temperature detector, and calculates the difference between the detected temperature and the target boiling temperature and the remaining heat collection time from the current time to the boiling time. A target heating capacity is calculated from the above, and a heating capacity of the heat collecting circuit is calculated from the temperatures detected by the first and second temperature detectors, so that the heating capacity becomes the target heating capacity. A heat collecting device configured to output a capacity control signal to the compressor.