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Refrigerator

A technology for refrigerators and radiators, which is applied in the field of refrigerators operating in a supercritical state on the high-pressure side. It can solve the problems of cooling obstacles, the decline of refrigeration capacity at the evaporator, and the inability to drop the temperature of refrigerants, so as to be beneficial to environmental problems and prevent The effect of temperature rise

Inactive Publication Date: 2007-09-19
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the temperature of the refrigerant at the outlet of the radiator cannot be lowered to a value sufficient to ensure the cooling capacity, and the specific enthalpy of the refrigerant flowing in the evaporator also increases, so the cooling capacity at the evaporator is significantly reduced, causing damage to the freezer or refrigerator. Indoor cooling poses obstacles

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] FIG. 1 shows a refrigerant circuit diagram of an embodiment of a refrigerator according to the present invention, and FIG. 2 shows a schematic diagram of a dew condensation prevention pipe added to an opening edge of an insulating box of the refrigerator. The body of the refrigerator 1 of the embodiment is composed of the following parts: an outer box 2 made of steel plate with an opening at the front; an inner box 3 made of thin-walled hard synthetic resin (such as ABS resin); An insulating box 4 made of a heat insulating material such as foamed polyurethane; and an insulating door (not shown) that closes the front opening of the insulating box 4 freely.

[0033] The interior of the heat-insulating box 4 is divided up and down by the partition wall 5. For example, the top of the partition wall 5 is used as a refrigerating room 6 cooled to a refrigeration temperature (for example, about +5° C.), and the bottom of the partition wall 5 is used as a room for freezing to a f...

Embodiment 2

[0062] In addition, in Embodiment 1, the capillary 23 was used as the decompression device, but as shown in FIG. . In the case of this embodiment, the refrigerant piping 42 before the expansion valve 26 (on the upstream side of the expansion valve 26 ) and the suction side piping 41 flowing out of the evaporator 24 are arranged so as to perform heat exchange, thereby constituting an internal heat exchanger. 27. The refrigerant circuit of the refrigerator of this embodiment shown in FIG. 4 is the same as the above-mentioned embodiment 1 in many points, so the structures that are the same as the refrigerator 1 of embodiment 1 or have the same function or effect are omitted. Detailed description.

[0063] Next, the operation of the refrigerator 1 of this embodiment will be described using the Mollier diagram of FIG. 5 . The basic control operation by the controller 50 is the same as that of the first embodiment, so detailed description is omitted.

[0064] Then, when the temp...

Embodiment 3

[0074] In addition, by moving the dew condensation prevention pipe 22B from the downstream region of the conventional radiator to the upstream region as described in each of the above-mentioned embodiments, there is no particular obstacle during normal operation, but it may cause problems when descending or at a high temperature. At the time of load, the temperature of the refrigerant flowing through the dew condensation prevention pipe 22B may become too high. That is, if the temperature of the refrigerant on the high-pressure side of the refrigerant circuit rises abnormally at the time of falling or high load, the refrigerant cannot be sufficiently radiated in the heat radiation of the refrigerant pipe 22A in the refrigerant upstream region of the radiator 22 . Since the temperature becomes low, high-temperature refrigerant may flow in the dew condensation prevention pipe 22B. Since the dew condensation prevention pipe 22B is located at the opening edge 4A of the heat insula...

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Abstract

There is disclosed a refrigerator in which a refrigerant circuit on a high-pressure side is operated in a supercritical state, and an object of the refrigerator is to improve a freezing capacity while securely preventing dew condensation at an opening edge by a condenser (22). In the refrigerator(1) including the refrigerant circuit constituted of a compressor (21), the condenser (22), a throttle means (23) and an evaporator (24): and a dew condensation preventive pipe (22B) constituting a part of the condenser(22) and disposed along the opening edge(4A) of an insulation box member(4), the refrigerant circuit on the high-pressure side is operated in the supercritical state, and the dew condensation preventive pipe(22B) is positioned on an upstream side of a refrigerant downstream region of the condenser(22).

Description

technical field [0001] The present invention relates to a refrigerator in which a dew condensation preventing tube constituting a part of a radiator of a refrigerant circuit is added to the opening edge of an insulated box in order to prevent dew condensation on the main body, and particularly relates to the operation of the high-pressure side of the refrigerant circuit in a supercritical state refrigerator. Background technique [0002] For a long time, this kind of refrigerator consists of an outer box made of metal, an inner box made of hard synthetic resin, and a heat insulating material filled between the two boxes to form an insulated box. Store in the freezer or refrigerator. An insulating door is provided on the front surface of the heat insulating box, and the freezer compartment and the refrigerator compartment are closed freely by the insulating door. Furthermore, a machine room in which a compressor and the like are installed is formed at the lower portion of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25D21/04F25D11/00
CPCF25B40/00F25B9/008F25B2700/21163F25B6/04F25D2700/123F25B2400/04F25D2700/14F25B2600/2501F25D21/04F25B2309/061F25B2400/052
Inventor 斋博之
Owner SANYO ELECTRIC CO LTD
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