JP2007051837A - Heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform efficient heating of refrigerant or water while preventing breakage of a heater in a heater to be mounted on an air conditioner adapted to perform defrosting operation while continuing heating operation. <P>SOLUTION: This heater comprises a heater part 2 provided within a casing 1 and a pipe 4 spirally wound around the heater part to run refrigerant or water in the inner part. The circumference of the heater part 2 and the pipe 4 is filled with or covered with a metal, and the inlet side of the pipe 4 is located on a side opposite to the inlet side of the heater part 2 so that the pipe 4 is opposed to the heater part 2. According to this, heat of the heater part 2 is efficiently transferred to the refrigerator or water, and sudden cooling of the heater part 2 with the refrigerant or water is prevented. Consequently, breakage of the heater part 2 by thermal shrinkage is prevented. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a heater mounted on a heat pump air conditioner, which can heat a refrigerant or water and improve the heating capacity.

  Conventionally, this type of heater is mounted on a heat pump air conditioner and heats the refrigerant or water, thereby contributing to an improvement in heating capacity. In particular, when defrosting frost adhering to the outdoor heat exchanger during heating, a high heating capacity can be obtained as compared with a defrosting method in which the refrigerant of the refrigeration cycle is switched in the reverse direction by switching the four-way valve (for example, Patent Document 1).

  FIG. 3 is a configuration diagram of a refrigeration cycle of an air conditioner equipped with a conventional heater.

As shown in FIG. 3, in a heat pump refrigeration cycle in which a compressor 101, a four-way valve 102, an indoor heat exchanger 110, an expansion mechanism 105, and an outdoor heat exchanger 103 are connected by a refrigerant circuit, the expansion mechanism in this refrigeration cycle. 105 and the outdoor heat exchanger 103 and between the suction side of the compressor 101, a refrigerant heating circuit having a heater 104, the discharge side of the compressor 101 in the refrigeration cycle, the outdoor heat exchanger 103, A defrosting circuit 109 that connects between the four-way valves 102, and when the outdoor heat exchanger 103 is defrosted during the heat pump operation of the refrigeration cycle, the refrigerant heated by the heater 104 causes the compressor 101 to After passing, it is branched into a flow through the indoor heat exchanger 110 and a flow through the defrosting circuit 109 through the outdoor heat exchanger 103. Les is joined at the inlet of the refrigerant heating circuit, discloses an invention that is configured to be heated by the heater 104 again.
Japanese Patent Laid-Open No. 11-182994

  However, this refrigeration cycle system has the following problems.

  In this refrigeration cycle, when performing the defrosting operation, the two-way valve 109a is opened, and the refrigerant discharged from the compressor 101 flows between the outdoor heat exchanger 103 and the four-way valve 102.

  In such a refrigeration cycle configuration, the refrigerant is heated by the heater in the heater in order to perform defrosting while continuing the heating operation, but the surface temperature of the heating element of the heater is higher than the central part of the heating element. Also, the end portion, that is, the vicinity of the inlet of the heater becomes the highest temperature.

  For this reason, if the inlet of the refrigerant to the heater is in the same direction as the inlet of the heater that heats the refrigerant, the high temperature portion of the heater will be rapidly cooled by the cold refrigerant, and the thermal contraction of the heater will become severe. The heater may be damaged.

  In particular, the refrigerant has a problem that it flows from the higher temperature to the lower temperature, and the heating area of the refrigerant that is originally required cannot be obtained efficiently.

  The present invention is intended to solve such problems of the prior art, and prevents damage due to thermal contraction of the heater inside the heater, improves the efficiency of refrigerant heating by the heater, and improves air conditioning. It aims at providing the heater which can drive the heating of a machine efficiently.

  In order to solve the above-mentioned conventional problems, the heater of the present invention has a heater part and a refrigerant pipe spirally wound around the heater part, and the pipe and the heater part are opposed to each other. The inlet side is installed on the side opposite to the inlet side of the heater part so that the high temperature part of the heater and the low temperature part of the refrigerant or water are avoided from approaching each other. Heat exchange is performed, and heat exchange is gradually performed in the vicinity of the high temperature portion of the end portion (that is, the inlet portion) of the heating element.

  This can prevent the heater part from being damaged due to thermal contraction, and the refrigerant or water is gradually warmed from the low temperature part of the heater. Especially in the refrigerant, a heating region that is effective for increasing the heating capacity is provided. It can be obtained efficiently, the refrigerant temperature can be sufficiently increased, and the heating capacity can be improved.

  The heater of the present invention prevents the heater from being damaged due to the thermal contraction of the heater by rapid cooling for heat exchange with water or the refrigerant, and efficiently heats the water or the refrigerant to mount the refrigeration The heating capacity of the cycle can be improved.

  A first invention is a heater that is mounted on a heat pump refrigeration cycle and that heats refrigerant or water by a heater and is installed in a lateral direction. The heater includes an electrothermal heater section and its surroundings. The pipe is spirally wound and has a pipe through which the refrigerant or water flows. The pipe is filled or covered with metal, and the inlet of the pipe through which the refrigerant or water flows is made to face the inlet direction of the heater. The refrigerant inlet side is located on the opposite side of the heater inlet side, and this configuration prevents the heater from being damaged and efficiently heats water or refrigerant. The heating capacity of the installed refrigeration cycle can be improved.

  The second invention is a heater that is mounted on the heat pump refrigeration cycle of the first invention and that heats refrigerant or water with a heater, and is installed in the vertical direction. The heater is electrically heated inside. The heater part and its surroundings are spirally wound, and the inside has a pipe through which refrigerant or water flows, and the pipe is filled with metal or covered with metal, and the heater is installed in the superheater from above, The inlet of the refrigerant or water flow pipe is installed in the lower part of the heater, facing the inlet direction of the heater, and the inlet side of the refrigerant is located opposite to the inlet side of the heater. By making this configuration, the heater can be prevented from being damaged, and the heating capacity of the mounted refrigeration cycle can be improved by efficiently heating the water or the refrigerant.

  In the third aspect of the invention, the heaters of the first and second aspects of the invention are installed in the horizontal direction, and the inlet side of the pipe through which the refrigerant or water flows is located opposite to the inlet side of the heater section. With this configuration, the condensed water adhering to the surface of the heater due to the cooling of the refrigerant does not flow to the inlet portion of the heater, causing no leakage or short circuit, which is effective for safety. Can be used.

  In the fourth aspect of the invention, in particular, the installation direction of the heater of the first and second aspects of the invention is set to the vertical direction, and the inlet side of the pipe through which the refrigerant or water flows is positioned opposite to the inlet side of the heater section. With this configuration, the condensed water adhering to the surface of the heater due to cooling of the refrigerant does not flow to the inlet part of the heater, causing no leakage or short circuit, which is effective for safety. Can be used.

In the fifth aspect of the invention, in particular, the posture at the time of installation of the heater of the fourth aspect of the invention is such that the inlet direction of the heater part is the upper part and the inlet side of the refrigerant or water is located at the lower part. As a result, the condensed water adhering to the surface of the heater due to the cooling of the refrigerant does not flow to the inlet portion of the heater and causes no electric leakage or short circuit, so that it can be used effectively for safety.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a configuration diagram of a heater according to the present invention.

  The casing 1 of the heater is made of metal, and the inside thereof may be filled with the same metal, may be filled with a plurality of types of metals, or may be filled with metal and liquid. .

  A heater portion 2 extends from the end surface 9 of the housing 1 and continues into the housing 1.

  Legs 8 are provided at the lower portion of the housing 1 and placed horizontally on an installation table or the like (not shown).

In addition, a pipe 4 around the heater portion 2 and inside the housing 1 for flowing heat of refrigerant or water to obtain heat is arranged spirally. Refrigerant or water flows in from the inlet pipe 3 of the pipe and flows out from the outlet pipe 5.
(Embodiment 2)
FIG. 2 is a configuration diagram of a heater according to the present invention.

  The casing 1 of the heater is made of metal, and the inside thereof may be filled with the same metal, may be filled with a plurality of types of metals, or may be filled with metal and liquid. .

  A heater portion 2 extends from the end surface 7 of the housing 1 and continues into the housing 1.

  Legs 6 are provided at the lower part of the housing 1 and placed vertically on an installation table or the like (not shown).

  In addition, a pipe 4 around the heater portion 2 and inside the housing 1 for flowing heat of refrigerant or water to obtain heat is arranged spirally. Refrigerant or water flows in from the inlet pipe 3 of the pipe and flows out from the outlet pipe 5.

  As described above, the heater of the present invention can efficiently heat the refrigerant or water, can prevent the heater from being damaged by heat shrinkage, and can be applied to heaters for other fluids.

The block diagram of the heater which shows the 1st Embodiment of this invention The block diagram of the heater which shows the 2nd Embodiment of this invention Refrigeration cycle diagram showing a conventional example

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case 2 Heater part 3 Inlet pipe 4 Piping 5 Outlet pipe 6 Leg part 7 Side surface of case 8 Leg part

Claims (5)

A heater that is mounted on a heat pump refrigeration cycle and that heats refrigerant or water with a heater. The heater is wound around in a spiral shape around the heater and the refrigerant or water flows inside. The inlet side of the pipe is defined as the inlet side of the heater part so that the pipe part and the heater part are opposed to each other. A heater characterized by being located on the opposite side. The heater according to claim 1, wherein the heater portion of the heater is an electrothermal heating element. The heating according to claim 1 or 2, wherein a heater is installed in a horizontal direction, and an inlet side of a pipe through which refrigerant or water flows is positioned opposite to an inlet side of the heater section. vessel. The installation direction of the heater is a vertical direction, and the inlet side of the pipe through which the refrigerant or water flows is positioned opposite to the inlet side of the heater section. Heater. 5. The heater according to claim 4, wherein an orientation of the heater is set such that an inlet direction of the heater portion is an upper portion and an inlet side of the refrigerant or water is located at a lower portion.

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