Refrigeration cycle apparatus and refrigeration cycle control method
a refrigeration cycle and control method technology, applied in refrigeration machines, compression machines with reversible cycles, refrigeration safety arrangements, etc., can solve the problems of difficult to ensure hot water supply capacity and excessive high pressure, and achieve the effect of suppressing an excessive increase in condensing temperatur
Inactive Publication Date: 2013-07-18
MITSUBISHI ELECTRIC CORP
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
The present invention is about a refrigeration cycle system that can prevent the temperature from getting too high and provide enough hot water to use at a certain point in time. This helps to keep the system running efficiently and ensures that the compressor is always being used in the most effective way.
Problems solved by technology
When the hot-water-supply temperature becomes high (e.g., 60 degrees C.) in such a hot-water-supply system, the condensing temperature increases, causing an excessive increase in high pressure.
This is a problem in that it is difficult to ensure a hot-water-supply capacity.
Method used
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embodiment 1
[0027]Embodiment 1 will be described below with reference to FIGS. 1 to 14.
[0028]FIG. 1 is a refrigerant circuit configuration diagram of an integrated air-conditioning and hot-water-supply system 100 (refrigeration cycle apparatus) according to Embodiment 1. In the following figures including FIG. 1, the dimensional relationships among components may sometimes differ from actual dimensional relationships. Furthermore, when a symbol used in a numerical expression first appears in this specification, the unit of the symbol will be written in parenthesis [ ]. If a symbol is dimensionless (i.e., has no units), the unit will be expressed as [-].
[0029]FIG. 2 schematically illustrates the flow of water from a hot-water-supply unit 304 to a hot-water-supply tank 305 in the integrated air-conditioning and hot-water-supply system 100.
[0030]FIG. 3 schematically illustrates various kinds of sensors in the integrated air-conditioning and hot-water-supply system 100, and a measuring unit 101, a ...
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An integrated air-conditioning and hot-water-supply system includes a compressor, a plate-type water heat exchanger, a hot-water-supply pressure-reducing mechanism, and an outdoor heat exchanger. Moreover, the integrated air-conditioning and hot-water-supply system includes a high-pressure sensor that detects a high pressure in the compressor, and a controller that calculates a condensing temperature of the plate-type water heat exchanger based on the high pressure detected by the high-pressure sensor. When the calculated condensing temperature is higher than or equal to a preset target condensing-temperature value, the controller performs condensing-temperature control for controlling the operating frequency of the compressor based on a difference between the calculated condensing temperature and the target condensing-temperature value, and performs opening-degree control for controlling the opening degree of the hot-water-supply pressure-reducing mechanism concurrently with the condensing-temperature control based on a difference between a current opening degree of the hot-water-supply pressure-reducing mechanism and a preset target opening-degree value.
Description
TECHNICAL FIELD[0001]The present invention relates to integrated air-conditioning and hot-water-supply systems that can perform an air-conditioning operation (i.e., cooling operation or heating operation) and a hot-water-supply operation at the same time, and more specifically, to an integrated air-conditioning and hot-water-supply system that determines a high-temperature-water supply state when the condensing temperature becomes higher than or equal to a predetermined value during a hot-water supply and that suppresses an excessive increase in high pressure by controlling the condensing temperature of a compressor and the opening degree of a pressure-reducing mechanism so as to achieve a predetermined hot-water-supply capacity within a usage range of the compressor.BACKGROUND ART[0002]In the related art, a hot-water-suppliable heat pump system that is equipped with a refrigerant circuit formed by connecting a hot-water-supply unit (i.e., a water heater) to a heat source unit (i.e....
Claims
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Patent Timeline
Login to View More IPC IPC(8): F25B49/02
CPCF25B13/00F25B49/027F25B2313/003F25B49/022F25B2313/02731F25B2313/02741F25B2700/1931F25B2313/0233F25B2500/07F25B2341/063F25B2600/19
Inventor TAMAKI, SHOGOSAITO, MAKOTO
Owner MITSUBISHI ELECTRIC CORP