JPH03260528A - Multichamber airconditioning apparatus - Google Patents

Abstract

PURPOSE:To obtain an apparatus low in price with a lessened loss in an ON-OFF operation during a heating by providing a user's side refrigerant cycle which has a plurality of user's side heat exchangers with at least one heat pump type outdoor unit and at least one outdoor unit exclusive for cooling in a heat source side refrigerant cycle. CONSTITUTION:In the cooling operation, a refrigerant cycle is entered and both or one of a heat pump type outdoor unit (f) and an outdoor unit (k) exclusive for cooling is operated. The refrigerant cycle in the outdoor unit (f) is the same as that of the conventional art. In the refrigerant cycle of the outdoor unit (k), the refrigerant discharged from a compressor 11 is condensed to be liquefied with a heat source side heat exchanger 13 and it is cooled by evaporation with a first auxiliary heat exchanger 18 being decompressed with an expansion valve 14 for cooling to be circulated to the compressor 11. At this point, a heat change is performed with a second auxiliary heat exchanger 19 to transfer heat to the user's side refrigerant cycle. The operation of the outdoor unit (f) and the user's side refrigerant cycle is the same as that of the conventional art. On the other hand, in the heating operation, the outdoor unit (f) alone is operated and the outdoor unit (k) is stopped. The operation of the outdoor unit (f) and the user's side refrigerant cycle is the same as that of the conventional art.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a refrigerant cycle for a multi-room heating and cooling system.

2. Description of the Related Art A conventional multi-room air-conditioning system separated into a heat source side refrigerant cycle and a user side refrigerant cycle is disclosed in Japanese Patent Application Laid-Open No. 62-272040 and is constructed as shown in FIG. 2. In FIG. 2, 11 is a compressor, 12 is a four-way valve, 13 is a heat source side heat exchanger, 14 is a pressure reducing device for cooling, 16 is a pressure reducing device for heating, and 16 is a pressure reducing device 14 for cooling during heating. A check valve 17 closes the pressure reducing device 15 for heating during cooling; 18 a first auxiliary heat exchanger connecting these in an annular manner;
It forms a heat source side refrigerant cycle. A second auxiliary heat exchanger 19 is integrally formed to exchange heat with the first auxiliary heat exchanger 18. 20 is a refrigerant amount adjustment unit that adjusts the amount of refrigerant during cooling and heating. Reference numeral 21 denotes a refrigerant conveying device which has a reversible characteristic such that the outflow direction of the refrigerant is opposite during cooling and heating, and these are housed in outdoor units f and f', respectively. 22a and 22b are heat exchangers on the user side, which are housed in the indoor unit (qy h) and connected to the connecting pipes i, i'Is.
It is connected to outdoor units) f and f' at l'.

The second auxiliary heat exchanger 19 and the refrigerant amount adjustment tank 20 housed in each of the outdoor units) f and f'. Refrigerant conveyance device 2
1. Usage side heat exchangers 22a, 22b and connection piping Li
′, ]+]′ are connected in a ring to form a user-side refrigerant cycle.

The operation of the multi-room heating and cooling system configured as described above will be explained.

During cooling operation, the refrigerant cycle is indicated by the solid line in the diagram.

In the heat source side refrigerant cycle, high-temperature, high-pressure gas from the compressor 11 passes through a four-way valve 12 in the heat source side heat exchanger 13, where it radiates heat and is condensed and liquefied, passes through a check valve 16, and is depressurized by the cooling expansion valve 14. 1 auxiliary heat exchanger 18 and circulated through the four-way valve 12 to the gas compressor 12.

At this time, the second auxiliary heat exchanger 19 of the user-side refrigerant cycle and the first auxiliary heat exchanger 18 exchange heat, and the gas refrigerant in the user-side refrigerant cycle is cooled and liquefied, and passes through the refrigerant amount adjustment tank 20. The refrigerant is sent to the refrigerant conveying device 21, and by this refrigerant conveying device 21, it is sent to the user-side heat exchangers 22a, 22b through the connecting pipe 'y', where it is endothermically evaporated, gasified, and passed through the connecting pipe 'y'. The heat is then circulated to the second auxiliary heat exchanger 19.

On the other hand, when the button is pressed during heating operation, the refrigerant cycle on the heat source side, which is the refrigerant cycle indicated by the broken line in the diagram, is compressed to 1! ! The high-temperature, high-pressure refrigerant from 11 is transferred from the four-way valve 12 to the first auxiliary heat exchanger 18
It radiates heat, condenses and liquefies, reduces the pressure through the check valve 17 in the heating pressure reducing device 15, absorbs heat and evaporates in the heat source side heat exchanger 13, and circulates through the four-way valve 12 to the compressor 11. At this time, the second auxiliary heat exchanger 19 of the user-side refrigerant cycle and the first
The auxiliary heat exchanger 18 exchanges heat, and the liquid refrigerant in the user-side refrigerant cycle is heated and gasified, and is sent to the user-side heat exchanger 22 through the connecting pipe "++", where it is heated, radiates heat, liquefied, and connected. The refrigerant is sent to the refrigerant conveying device 21 through the pipe's J,
The refrigerant is circulated from the refrigerant amount adjustment tank 20 to the second auxiliary heat exchanger 19.

Problems to be Solved by the Invention However, with the above configuration, when the heating load is considerably smaller than the cooling load in modern building air conditioners, the ON-OFF operation loss during heating is large. However, there was a problem in that the price was also increasing.

Therefore, the present invention provides a multi-room air conditioning system that solves the above problems.

Means for Solving the Problems In order to solve the above problems, the air conditioning system of the present invention includes at least one heat pump type outdoor unit and at least one cooling-only outdoor unit in the heat source side refrigerant cycle, and a plurality of user side It is equipped with a user-side refrigerant cycle that has a heat exchanger.

Function The present invention has the above-described configuration, so that the 0 button can be pressed during heating in a situation where the heating load requires less energy than the cooling load.
N-OFF Operation loss can be reduced and the price can also be reduced.

EXAMPLE Hereinafter, a heating and cooling system according to an example of the present invention will be described with reference to the drawings. FIG. 1 shows a refrigerant cycle of a heating and cooling system according to an embodiment of the present invention. In FIG. 1, f is a heat pump type outdoor unit, which is the same as the conventional unit, and its explanation will be omitted here.

k is an outdoor unit exclusively for cooling, 11 is a compressor, 13 is a heat source side heat exchanger, 14 is a cooling pressure reducing device, and 18 is a first auxiliary heat exchanger, which serves as an evaporator. 19 is a second auxiliary heat exchanger formed integrally with the first auxiliary heat exchanger to exchange heat; 20 is a refrigerant amount adjustment tank; and 21 is a refrigerant conveying device.

The operation of the multi-room heating and cooling system configured as described above will be explained.

During cooling operation, the refrigerant cycle is indicated by the solid line in the figure, and both or one of outdoor units (f and k) is in operation.

The refrigerant cycle in the outdoor unit (f) is the same as in the conventional example, and will be omitted here. In the refrigerant cycle of the outdoor unit (k), the refrigerant discharged from the compressor 11 is condensed and liquefied in the heat source side heat exchanger 13, depressurized in the cooling expansion valve 14, evaporated and cooled in the first auxiliary heat exchanger 18, and compressed. Circulate to machine 11.

At this time, heat is exchanged in the second auxiliary heat exchanger 19 and heat is transferred to the utilization side refrigerant cycle. The operations of the outdoor unit fjp and the user-side refrigerant cycle are the same as in the conventional example, and will not be described here.

On the other hand, during heating operation, only the outdoor unit is operated, and the outdoor unit is stopped. The operations of the outdoor unit f and the user-side refrigerant cycle are the same as in the conventional example, and will not be described here.

As described above, according to this embodiment, the heating load is turned on to the building air conditioner, which is larger than the cooling load, and the ON-FF operation loss during heating can be reduced, thereby making it possible to save energy. Also, during heavy-load cooling operation, the heat pump type outdoor unit f
Since it is possible to use an outdoor unit exclusively for cooling, which has a simple configuration, it is possible to reduce the cost.

Effects of the Invention As described above, the present invention includes at least one heat pump type outdoor unit in the heat source side refrigerant cycle and at least one
By installing two outdoor units dedicated to cooling, it is possible to use the heat pump type outdoor unit of the heat source side refrigerant cycle and the outdoor unit dedicated to cooling separately during heating and cooling in building air conditioning where the heating load is much lower than the cooling load. The ON-FF button can be pressed during heating.This has the effect of reducing energy loss and saving energy, as well as simplifying the structure of the system and making it cheaper.

[Brief explanation of drawings]

FIG. 1 is a refrigerant cycle diagram of a heating and cooling system according to an embodiment of the present invention, and FIG. 2 is a diagram of a refrigerant cycle of a conventional heating and cooling system. 11... Compressor, 13... Heat source side heat exchanger, 14... Cooling pressure reducing device, 15...
... Heating pressure reduction device, 18... First auxiliary heat exchanger, 19... Second auxiliary heat exchanger, 21...
... Refrigerant conveyance device, f ... Heat pump outdoor unit, k ... Outdoor unit exclusively for cooling.

Claims (4)

[Claims] (1) A heat pump type heat source side refrigerant cycle consisting of a compressor, a heat source side heat exchanger, a heat source side four-way valve, a cooling pressure reducing device, a heating pressure reducing device, and a first auxiliary heat exchanger connected in an annular manner; At least one heat pump type outdoor unit that is integrally formed with a first auxiliary heat exchanger and has a second auxiliary heat exchanger that exchanges heat and a refrigerant conveyance device, a compressor, a heat source side heat exchanger, a cooling pressure reducing device, and A multi-room air conditioning/heating system comprising at least one cooling-only outdoor unit formed by connecting first auxiliary heat exchangers in a ring shape, and a user-side refrigerant cycle having a plurality of user-side heat exchangers. (2) The multi-room air conditioning system according to claim 1, wherein the compressor is equipped with a capacity control compressor. (3) The multi-room air conditioning system according to claim 1, wherein the heat source side refrigerant cycle and the user side refrigerant cycle use different refrigerants. (4) The multi-room air conditioning system according to claim 1, wherein a stacked heat exchanger is used as the first auxiliary heat exchanger and the second auxiliary heat exchanger.