JPS62774A - Cooling additional heat device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a heat pump air conditioning system and a hot water supply system having a refrigerant heating evaporator.

BACKGROUND ART A conventional cooling additional heat device of this type is shown in FIG.
An electric heater 6 is provided in the middle of the heating heat exchanger 3, and after evaporating some or all of the refrigerant condensed in the heating heat exchanger 3 during heating operation, the refrigerant is further condensed in the heating heat exchanger 3. It was a trap to ensure heating capacity. (for example,
(Special Publication No. 45-38038). In addition, as shown in Fig. 4, a refrigeration/heating device 9 having a pump 7 for pumping liquid refrigerant under full pressure and a heater 8 is installed in parallel with the heating heat exchanger 3 to ensure heating capacity during heating operation. was.

(For example, Japanese Utility Model Publication No. 50-37255) Problems to be Solved by the Invention However, in the configuration as shown in FIG. As the exchanger 3 becomes larger, it also has the problem of being limited by the capacity of the electric heater 6. Also, in the configuration shown in FIG. Since the refrigerating and heating device 9 with the refrigeration and heating device 9 is installed in parallel with the heating heat exchanger 3, the amount of refrigerant liquid sent from the pump 7 to the heater 8 and the heater 8 are
balance with the amount of heating, controllability and reliability of the pump 7,
This had the problem of initial cost and running cost.

The present invention solves these conventional problems and aims to make the device more compact, economical, and reliable.

Means for Solving the Problems In order to solve the above problems, the cooling additional heat device of the present invention comprises a refrigeration cycle consisting of a compressor, a four-way valve, a heating heat exchanger, a pressure reduction device, and an outdoor heat exchanger. and a first check valve, a refrigerant reservoir tank, a second reverse valve, and a refrigerant heating evaporator located lower than the refrigerant reservoir tank in parallel with the heating heat exchanger, and the refrigerant reservoir tank and said second
A bypass pipe equipped with a check valve and an on-off valve in parallel with the refrigerant heating evaporator is provided to cool ILf,! It consists of a closed circuit.

Operation The present invention has the above-mentioned configuration, so that when the on-off valve is opened, the internal pressure of the refrigerant reservoir tank is adjusted. The liquid refrigerant in the refrigerant storage tank is balanced with the internal pressure of the refrigerant heating evaporator, and the liquid refrigerant in the refrigerant storage tank is heated and evaporated and gasified by the head difference between the refrigerant storage tank and the refrigerant heating evaporator. ] Since this is a system in which the heat is sent to the heat exchanger, radiated to the temporary heating side, condensed and liquefied, and returned to the refrigerant storage tank, there is no need to attach an electric heater to the heat exchanger, and no refrigerant pump is required. Then,
It is possible to downsize the equipment and reduce the initial cost and running cost of the refrigerant pump.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

In FIG. 1, a 10 rri compressor, 11 is a four-way valve, changes the refrigerant flow direction between heating operation and cooling operation. 12
is a heating heat exchanger, and during heating operation, the condensation effect of the refrigerant,
During cooling operation, the refrigerant evaporates. 1st-: Pressure reduction device, 14 is an outdoor heat exchanger, which performs the evaporation action of the refrigerant when the atmospheric thermal enthalpy is large during heating operation, and performs the refrigeration condensation action during cooling operation. Further, the compressor 1o, the four-way valve 11, the heating heat exchanger 12, the pressure reducing device 13, and the outdoor heat exchanger 14 are connected in sequence. 15 is a first check valve, 16 is a refrigerant reservoir tank, 1
Reference numeral 7 indicates a second reverse valve, and reference numeral 18 indicates a refrigerant heating evaporator, which is provided at a lower position than the refrigerant storage tank 16, and which evaporates and gasifies the refrigerant using a heating source 19 when the heating capacity is insufficient. . Further, the first check valve 15, the frozen liquid storage tank 16, the second check valve, and the refrigerant heat evaporator 18 are sequentially connected and provided in parallel with the heating heat exchanger 12. The refrigerant flows in one direction through the heating heat exchanger 12, the first check valve 15, the frozen liquid reservoir tank 16, the second check valve 17, and the refrigerant heating evaporator 18. It is composed of Reference numeral 20 denotes an on-off valve, which is provided in the middle of a bypass pipe 21 that is arranged in parallel with the frozen liquid storage tank 16, the second check valve 17, and the refrigerant jA thermal evaporator 18.

In the above configuration, during cooling operation, the high-temperature, high-pressure refrigerant gas 11 compressed by the compressor 1o flows through the four-way valve 11 in the direction of the broken line in FIG. 1 and flows into the outdoor heat exchanger 14. Then, it radiates heat to the atmosphere, condenses and liquefies, is depressurized by the pressure reducing device 13, flows into the heating heat exchanger 12, absorbs heat from the object to be cooled (rush air, water, etc.), evaporates into gas, and passes through the four-way valve 11. The compressor 10
Return to

Next, the heating operation will be described. First, we will discuss the independent operation of the heat pump when the atmospheric thermal enthalpy is large. Compressor 1
The high-temperature, high-pressure refrigerant gas compressed at
The flow flows in the direction of the solid line in the figure, flows into the heating heat exchanger 12, radiates heat to the medium to be heated (air, water, etc.), and condenses and liquefies (at this time, if the medium to be heated is air, it is indoor heating; if it is water, it is (Used in hot water supply equipment.) It flows into the pressure reducing device 13, is depressurized, flows into the outdoor heat exchanger 14, absorbs atmospheric heat, evaporates into gas, passes through the four-way valve 11, and returns to the compressor 10. or,
When the atmospheric thermal enthalpy is low and the heating capacity is insufficient, the heat pump operation and the refrigerant heating of the refrigerant heating evaporator 18 can be operated in combination; in this case, the heating source 19
ONI, the high-pressure refrigerant is heated in the refrigerant heating evaporator 18 to evaporate and gasify, join with the high-temperature and high-pressure refrigerant gas compressed by the compressor 10, flow into the heating heat exchanger 12, and radiate heat there. The refrigerant is condensed and liquefied and distributed to the pressure reducing device 13 and the refrigerant reservoir tank 16. Then, the refrigerant flowing into the pressure reduction table @13 absorbs atmospheric heat in the outdoor heat exchanger 14, evaporates into gas, and returns to the compressor 10, as in the case of the heat pump operation. On the other hand, since the pressure of the liquid refrigerant that has flowed into the refrigerant storage tank 16 is lower than the pressure of the refrigerant heating evaporator 1 day, when the on-off valve 20 is opened, the liquid refrigerant flows into the refrigerant storage tank 16 and the refrigerant heating evaporator. The pressures of the refrigerant storage tank 16 and the refrigerant heating evaporator 18 are made equal, and the liquid refrigerant in the refrigerant storage tank 16 flows to the refrigerant heating evaporator 18 due to the head difference in position between the refrigerant storage tank 16 and the refrigerant heating evaporator 18 . Cold [-heat to evaporate and gasify. A P-i Mollier diagram (P: pressure, i nientalpy) at that time is shown in FIG. In FIG. 2, the numbers in the figure are the same as those in FIG. The heating capacity Q1 during independent operation of the heat pump is the amount of heat absorbed from the atmosphere QE = GRtX△11 (△11
is the outdoor heat exchanger 14 population, refrigerant enthalpy difference at the outlet)
, heating capacity Q1"GRIXΔ12 (Δ12 is the heating heat exchanger 12 population, the refrigerant enthalpy difference at the outlet), whereas when the heat pump operation and the refrigerant heating evaporator 18 are operated together, the heating capacity Q is Q-Ql +' Q2 (Q2
=GR2xΔ12, GR2 is the amount of refrigerant circulating through the refrigerant storage tank 16 and the refrigerant heating evaporator 18), and is improved by Q2. Next, when the atmospheric thermal enthalpy further decreases and the heating capacity is insufficient, the refrigerant heating evaporator 18,
The refrigerant heating operation can be performed using the refrigerant circuits of the heating heat exchanger 12 and the refrigerant storage tank 16, and in this case, although the outdoor heat exchanger 14 does not absorb atmospheric heat, a heating capacity is required regardless of the atmospheric enthalpy. You can only take it out. It is sufficient to input m heat sources 19 in an amount necessary for so-called heating capacity. Therefore, the heating capacity can be taken out according to the required heating capacity (load), there is no need to add an electric heater to the heating heat exchanger 12, and there is also a shortage of refrigerant pumps, so the equipment can be made smaller. This has the effect of reducing cost, initial cost, and running cost.

Effects of the Invention As described above, the cooling additional heat device of the present invention provides the following effects.

(1) A refrigeration cycle is composed of a compressor, a four-way valve, a heating heat exchanger, a pressure reducing device, and an outdoor heat exchanger, and a first reverse valve and a refrigerant liquid storage tank are arranged in parallel with the heating heat exchanger. A bypass pipe (!--provided with The height of the refrigerant storage tank is higher than the refrigerant heating evaporator to form a closed refrigerant circuit, so by opening the on-off valve, the pressure inside the refrigerant storage tank and the refrigerant heating evaporator can be adjusted. The pressure inside the container is made equal, and the O liquid refrigerant in the refrigerant storage tank is caused to flow into the refrigerant heating evaporator due to the position head difference between the refrigerant storage tank and the refrigeration heat generator, and the evaporation is reduced to 7. This increases the refrigerant enthalpy and adds the amount of P to the heat amount on the heat pump cycle side to increase the heating capacity. Therefore, there is no need to add an electric heater to the heating heat exchanger, and the refrigerant pump Since there is no need to use it, the device can be made smaller and the initial cost and running cost can be reduced.

t2) When the 6a thermal enthalpy is large and the heating load is small, heating operation is performed using a single pump cycle if the operating efficiency is good, and when the capacity is slightly less than the heating load, KVi, a combination of heat pump operation and refrigerant heating evaporator is used. Insufficient heating capacity can be resolved through operation, and if the capacity is smaller than the heating load, the load can be satisfied by operating the refrigerant heating evaporator, and the load can be constantly satisfied with good operating efficiency.

[Brief explanation of the drawing]

FIG. 1 is a refrigerant circuit diagram of a cooling additional heat device according to an embodiment of the present invention, FIG. 2 is a pressure-enthalpy diagram, and FIG.
FIG. 4 is a refrigerant circuit diagram of a conventional heating and cooling system. 10...Compressor, 11...Four-way valve, 1
2... Heating heat exchanger, 13... Pressure reducing device, 14... Outdoor heat exchanger, 15...
First check valve, 16...Refrigerant reservoir tank, 1
7...Second check valve, 18...Refrigerant heating evaporator, 20...Opening/closing valve, 21...
bypass pipe. Name of agent: Patent attorney Toshio Nakao and 1 other list
2 Figure Engulpie

Claims (3)

[Claims] (1) A compressor, a four-way valve, a heating heat exchanger that condenses the refrigerant during heating operation and evaporates it during cooling operation;
A refrigeration cycle is configured from a pressure reducing device and an outdoor heat exchanger, and a first check valve, a refrigerant reservoir tank, a second check valve, and a refrigerant heating evaporator are provided in parallel with the heating heat exchanger, The cooling additional heat device further comprises a bypass pipe having an on-off valve arranged in parallel with the refrigerant reservoir tank, the second check valve, and the refrigerant heating evaporator to form a refrigerant closed circuit. (2) The height position of the refrigerant liquid storage tank is provided at a higher position than the refrigerant heating evaporator.
The cooling additional heat device described in Section 1. (3) During cooling operation, a refrigeration cycle operation consisting of the compressor, the four-way valve, the outdoor heat exchanger, the pressure reducing device, and the heating heat exchanger is performed, and during the heating operation, the compressor, the a four-way valve, the heating heat exchanger, the pressure reducing device,
heat pump cycle operation consisting of the outdoor heat exchanger, the compressor, the four-way valve, the heating heat exchanger, the pressure reducing device, the outdoor heat exchanger, the refrigerant reservoir tank, and the refrigerant heating evaporator. and a control device for controlling a combined operation of a heat pump and refrigerant heating comprising the heating heat exchanger, the refrigerant storage tank, and the refrigerant heating evaporator. A cooling additional heat device according to claim 1.