JPS608290Y2 - Regenerative heating and cooling equipment - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a regenerative heating and cooling device that stores heat only by a heat pump device.

In conventional regenerative air-conditioning systems, during heating, if the temperature of the heat medium in the heat storage tank is low, the heat capacity of the heat exchanger on the heat medium side is large, so the high pressure does not rise, resulting in abnormal low pressure. There was a drawback that the efficiency of the heat pump device decreased.

Therefore, in such cases, the heat pump equipment should be stopped and
The electric heater was used to store heat up to a certain temperature, and then switch to the heat pump for operation, but the efficiency of the electric heater is only about 1N compared to the heat pump, so not only does it have a higher maintenance ratio, but it also has to shorten the heat storage time. It required the use of a large-capacity electric heater, which had the disadvantage of increasing contracted power.

This idea was made to eliminate the above drawbacks.
A heat storage tank containing a heat medium;
a heat pump device having a first heat exchanger that supplies thermal energy to the heat medium; a heat pump device communicating with the heat pump device and housed in the heat storage tank and exchanging more heat than the first heat exchanger; a second heat exchanger formed with a small amount; first and second solenoid valves provided at the refrigerant inlets of the first and second heat exchangers, respectively;
and a first and second solenoid valve that respectively drives a second solenoid valve.
An electromagnetic coil and a temperature-sensing portion thereof are provided in the heat storage tank, and operate according to the temperature of the heat medium in the heat storage tank, so that the temperature in the heat medium reaches a predetermined temperature during heating operation of the heat pump device. When the heat medium temperature is lower than a predetermined temperature, the first electromagnetic coil is energized to open the first electromagnetic valve to operate the first heat exchanger, and when the heat medium temperature is lower than a predetermined temperature, the second electromagnetic coil is energized. By energizing the coil to open the second electromagnetic valve and operate the second heat exchanger, the heat pump device stores heat even if the temperature of the heat medium in the heat storage tank is low. The purpose of the present invention is to provide a heat storage type air-conditioning device that is highly efficient and has a low maintenance ratio.

An embodiment of this invention will be described below.

In FIG. 1, 1 is a compressor, 2 is a four-way valve, 3 is a first electromagnetic valve, 4 is a first heat exchanger on the heat medium side, 5 is a throttle device,
Reference numeral 18 denotes a heat source side heat exchanger, each of which is connected with refrigerant piping and constitutes the heat pump device 6.

7 is a second heat exchanger that communicates with the heat pump device 6 and is formed in common with the first heat exchanger 4 by bypassing a part of the first heat exchanger 4; The heat exchange capacity is smaller than that of No. 4.

8 is a second solenoid valve provided in the circuit of the second heat exchanger 7, and the first solenoid valve 3 and the second solenoid valve 8 are connected to the first and second heat exchangers 4, 7 refrigerant inlets, respectively.

9 is a heat storage tank accommodating the first and second heat exchangers 7;
0 is a heat medium housed in the heat storage tank 9, 11 is a temperature sensing part of a thermostat (not shown) that senses the temperature of the heat medium 10, 12 is an air conditioning circuit connected to the heat storage tank 9, and 13 is a heat medium 10. 14 is an indoor radiator.

In FIG. 2, 15 is a contact of the thermostat, 16 is the first electromagnetic coil of the first electromagnetic valve 3, and 17 is the second electromagnetic coil of the second electromagnetic valve 8 (FIG. 1). are connected in parallel.

The thermostat has a temperature sensing part 11 provided in the heat storage tank 9, and operates according to the temperature of the heat medium 10 in the heat storage tank 9, and when the heat pump device 6 is in heating operation, the temperature in the heat medium 10 is controlled. When the temperature is higher than the predetermined temperature, the first
The electromagnetic coil 16 is energized to open the first electromagnetic valve 3 and activate the first heat exchanger 4, and when the temperature of the heat medium 10 is lower than a predetermined temperature, the second electromagnetic coil 17 is energized. is energized to open the second electromagnetic valve 8 and cause the second heat exchanger 7 to operate.

Next, the effect will be explained.

During heating, the refrigerant and heat medium 10 flow as shown by solid arrows in FIG.

That is, the refrigerant gas leaving the compressor 1 passes through the four-way valve 2, condenses in the first heat exchanger 4, and heats the heat medium 10 in the heat storage tank 9, but the temperature of the heat medium 10 is below a predetermined temperature. For example, when the temperature is below 30°C, the temperature sensing part 11 of the thermostat (not shown) senses this temperature, and the contact 15 enters the low temperature side,
The second electromagnetic coil 17 is energized, and the first electromagnetic coil 16
Since the refrigerant is not energized, the refrigerant bypasses a part of the first heat exchanger 4 and passes through the second solenoid valve 8 to the second heat exchanger 7.
to go into.

Therefore, the heat dissipation area for condensation is reduced, the high pressure can be maintained high, and the amount of refrigerant circulation can be ensured, so there is no drop in the low pressure, and heat is stored effectively in the heat medium 10.

When the heat medium 10 reaches a predetermined temperature or higher, the contact 15 enters the high temperature side, energizing the first electromagnetic coil 16, opening the first electromagnetic valve 3 and closing the second electromagnetic valve 8, returning to the original cycle. .

Next, the refrigerant is depressurized by the expansion device 5, evaporated in the heat source side heat exchanger 18, and returned to the compressor 1 through the four-way valve 2.

On the other hand, the stored heat medium 10 is circulated through the air-conditioning circuit 12 by the circulation pump 13 and is radiated by the lumbar inner side radiator 14 to heat the room.

During cooling, the heat pump device 6 is switched to the cooling cycle by the four-way valve 2, the heat medium 10 is cooled by the first heat exchanger 4, and ice is stored.

This heat medium is circulated and the indoor radiator 14 is used as in the case of heating.
Cooling is performed through the

As described above, according to this invention, when the temperature of the heat medium in the heat storage tank is low, thermal energy is supplied to the heat medium through the second heat exchanger, which has a smaller heat exchange capacity than the first heat exchanger. As a result, the heat pump can be operated only and the efficiency of the heat pump can be fully utilized, making it possible to reduce the maintenance ratio and shorten the heat storage time.

Furthermore, it eliminates the need for a heater, etc., which was conventionally used when the temperature inside the heat storage tank is low, and reduces the cost of the equipment, which is of great practical value.

[Brief explanation of the drawing]

FIG. 1 shows the configuration of a heating and cooling system showing an embodiment of this invention, and FIG. 2 shows an electrical circuit diagram of the main parts of this invention. 1. Compressor, 3. First solenoid valve, 4. First heat exchanger, 6. Heat pump device, 7. Second heat exchanger, 8. Second solenoid valve, 9. Heat storage tank, 10. Heat medium, 11. Temperature sensing unit, 12. Air conditioning circuit, 15. Thermostat contact, 16. First electromagnetic coil, 17.
-Second electromagnetic coil.

Claims (1)

[Scope of utility model registration request] a heat pump device having a heat storage tank containing a heat medium; a first heat exchanger housed in the heat storage tank and supplying thermal energy to the heat medium; a second heat exchanger that is housed and is formed to have a smaller heat exchange capacity than the first heat exchanger, and a first heat exchanger provided at the refrigerant inlet of the first and second heat exchangers, respectively. and a second electromagnetic valve, first and second electromagnetic coils that respectively drive the first and second electromagnetic valves, and a heat sensing portion thereof is provided in the heat storage tank, and a heat medium in the heat storage tank. during heating operation of the heat pump device, when the temperature in the heat medium is higher than a predetermined temperature, the first electromagnetic coil is energized to open the first electromagnetic valve. actuating the heat exchanger, and when the heat medium temperature is lower than a predetermined temperature, energizing the second electromagnetic coil to open the second electromagnetic valve.
A heat storage type air-conditioning device characterized by comprising: a thermostat that operates a heat exchanger.