JP2010121840A - Hot water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact hot water tank 17 capable of making an entire outdoor unit compact. <P>SOLUTION: In this hot water heater, an indoor unit 5 and the outdoor unit 1 are interconnected by communication piping 4, and hot water heated by the outdoor unit 1 is circulated to the indoor unit 5 to perform heating. A hot water circuit including a water-refrigerant heat exchanger 15 for heating water in the hot water circuit, the hot water tank 17 and a circulating pump and a refrigerant circuit including a compressor, an evaporator and a decompression device etc. are stored within the outdoor unit 1. The height position of a water supply port 39 provided on the upper face of the hot water tank 17 is set approximately equal to that of a body of the hot water tank 17, and a groove 42 is provided around the water supply port 39 to guide water spilling over the periphery of the water supply port 39 to the lateral face direction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a heat pump type hot water heating apparatus.

In a normal air conditioner, a refrigerant circuit is configured by a compressor housed in an outdoor unit, an outdoor heat exchanger, a four-way switching valve, and an indoor heat exchanger housed in the indoor unit. When the four-way switching valve is switched so that the outdoor heat exchanger functions as a condenser and the indoor heat exchanger functions as an evaporator, a cooling operation can be performed. In addition, when the four-way switching valve is switched so that the outdoor heat exchanger functions as an evaporator and the indoor heat exchanger functions as a condenser, heating operation can be performed.
In addition, a water-refrigerant heat exchanger is provided in the upper part of the outdoor unit. The water-refrigerant heat exchanger has an inner pipe inserted into the outer pipe, and liquid and gas passing through the inner pipe, and the outer pipe and the inner pipe. A so-called water-refrigerant heat exchanger is known that exchanges heat with a liquid or gas passing between pipes. Water is introduced into one path of such a water-refrigerant heat exchanger, the refrigerant is introduced into the other path to exchange heat, and the hot water after heat exchange is dissipated from a fan convector or floor heating installed indoors. It is possible to heat the room by circulating it in a vessel. In this case, heating can be performed by connecting the outdoor unit compressor to the water-refrigerant heat exchanger and controlling the water-refrigerant heat exchanger to function as a refrigerant condenser.
And the said water-refrigerant heat exchanger, a warm water tank, a circulation pump, and an indoor unit are connected with warm water piping to form a warm water circulation path, and the warm water tank has a water supply port capable of replenishing water from above, Excluding a predetermined position around the water supply port, an inundation restriction rib that stands up to a height close to the top plate of the casing of the outdoor unit and guides water spilled around the water supply port to the predetermined position. By providing it, even if water is spilled at the water supply tank when water is supplied to the hot water tank, it can quickly prevent water from entering the electrical components such as the control circuit provided in the outdoor unit by guiding the spilled water to the drainage path. It was something to do. (For example, see Patent Document 1)
Japanese Patent No. 3564553

However, in the outdoor unit, functional parts such as a refrigeration circuit, a hot water circuit, a water-refrigerant heat exchanger that transmits heat from the refrigeration circuit to the hot water circuit, and a control circuit are arranged narrowly. It was much larger than the machine and required compactness.
Further, the water intrusion regulation rib protrudes considerably on the upper surface of the hot water tank, so that a useless space is generated between the hot water tank main body and the top plate.

  This invention pays attention to this point and solves the above-mentioned drawbacks. In particular, the configuration is such that the indoor unit and the outdoor unit are connected by a connecting pipe, and the hot water heated by the outdoor unit is circulated to the indoor unit for heating. The outdoor unit includes a water-refrigerant heat exchanger that heats water in the hot water circuit, a hot water circulation circuit including a hot water tank and a circulation pump, and a refrigeration provided with a compressor, an evaporator, a decompressor, and the like. A hot water heating apparatus for storing a circuit, wherein the height of the water supply port provided on the upper surface of the hot water tank is substantially the same as the height of the main body of the hot water tank, a groove is provided around the water supply port, Guided water spilled around to the side.

  According to the present invention, the height of the water supply port provided on the upper surface of the hot water tank is set to be substantially the same as the height of the hot water tank body, the groove is provided around the water supply port, and water spilled around the water supply port is disposed outdoors. Since it is guided outside the machine, the top surface of the hot water tank body can be brought close to the top plate as much as possible while preventing water from entering the outdoor unit, making the hot water tank compact and making the entire outdoor unit compact. Can be promoted.

Next, an outdoor unit of a hot water heater according to the present invention will be described with reference to an embodiment shown in the drawings.
Reference numeral 1 denotes an outdoor unit of a hot water heater, which includes a refrigeration circuit unit 2 at a lower portion and a hot water circuit unit 3 at an upper portion, and is connected to an indoor unit 5 such as a fan convector by a connection pipe 4.
An air suction port (not shown) is provided on the back and left side of the refrigeration circuit unit 2, and an air outlet 6 is provided on the front surface. A compressor 7, an evaporator 8, an expansion valve 9, and a blower fan 10 are provided inside. A refrigeration circuit control unit 11 and the like are provided.
The hot water circuit section 3 has a water supply lid 12 on the upper surface and a pipe outlet 13 on the rear surface, and a refrigerant connection valve 14, a water-refrigerant heat exchanger 15, an auxiliary heater 16, a hot water tank 17, and a circulation pump 18 inside. The hot water connection valve 19 and the hot water circuit control unit 20 are provided.

  The indoor unit 5 is composed of a fan convector and the like. The indoor unit 5 is provided with a warm air outlet 21 at the lower part of the front surface, an operation unit 22 at the upper part of the front surface, an air inlet (not shown) and the like at the rear side, and heat inside. A heat exchanger 23 for discharging, a blower fan 24, an indoor control unit 25, and the like are provided.

  The compressor 7 can change the rotational speed in multiple stages by an inverter drive circuit (not shown) or the like, and the rotational speed is determined by a command from the refrigeration circuit control unit 11 according to the required capacity. . The evaporator 8 is a fin-tube heat exchanger and is provided inside the air suction port. The evaporator 8 absorbs heat from the blown air by blowing air from the blower fan 10.

  The water-refrigerant heat exchanger 15 is composed of a double pipe having an inner pipe inserted into the outer pipe. The outer surface of the inner pipe is configured so that a large number of fins are erected to increase the heat exchange efficiency inside and outside the inner pipe. Heat is exchanged between the refrigerant and water by using a hot water path 26 through which water passes inside the inner pipe of the double pipe and a refrigerant path 27 through which refrigerant passes between the inner pipe and the outer pipe. It is possible to heat the passing water.

  Reference numeral 28 denotes a discharge temperature sensor attached to the refrigerant pipe on the discharge side of the compressor 7, which measures the discharge temperature of the compressor 7 and sends a signal to the refrigeration circuit control unit 11. Reference numeral 29 denotes an outside air temperature sensor provided on the upstream side of the air flow path in the refrigeration circuit unit 2 and measures the outside air temperature. Reference numeral 30 denotes a heat exchange sensor that is attached to the evaporator 8 and measures the temperature of the evaporator 8 to control the defrosting operation. Reference numeral 31 denotes a refrigerant intermediate sensor that is attached to the middle of the water-refrigerant heat exchanger 15 and measures the temperature of the refrigerant.

  Reference numeral 32 denotes a forward hot water sensor which is attached to a hot water pipe between the water-refrigerant heat exchanger 15 and the auxiliary heater 16 and measures the pipe temperature. A heater hot water sensor 33 is attached to a hot water pipe between the auxiliary heater 16 and the hot water tank 17 and measures the pipe temperature. A return hot water sensor 34 is attached to a hot water pipe between the indoor unit 5 and the water-refrigerant heat exchanger 15 and measures the pipe temperature.

  A safety thermo 35 detects overheating of the auxiliary heater 16. A water level sensor 36 detects the water level in the hot water tank 17 with two electrodes attached to the hot water tank 17. Reference numeral 37 denotes a bypass pipe that connects between the circulation pump 18 and the hot water connection valve 19 and between the other hot water connection valve 19 and the return hot water sensor 34, and adjusts the amount of hot water circulation to the indoor unit 5. .

  Explaining the refrigeration circuit, the high-temperature refrigerant discharged from the compressor 7 located in the refrigerant circuit section 2 passes through the refrigerant circulation valve 14 and has a double pipe structure provided in the hot water circuit section 3. The water-refrigerant heat exchanger 15 exchanges heat between the hot water passage 26 in contact with the refrigerant passage 27, and the water in the hot water passage 26 is heated by the high-temperature refrigerant. After releasing heat in the refrigerant path 27 and liquefying the refrigerant, the refrigerant passes through the other refrigerant circulation valve 14 and returns to the expansion valve 9 of the refrigerant circuit unit 2. Then, after the refrigerant is vaporized, it returns to the compressor 7 and the circulation of the refrigeration cycle is continued.

  Explaining the hot water circuit, the hot water heated by the water-refrigerant heat exchanger 15 is further heated by the auxiliary heater 16 at the time of defrosting operation or when the capacity in the refrigeration circuit is insufficient, and the hot water tank 17 has a necessary temperature. Hot water is stored. The hot water in the hot water tank 17 passes through the hot water connection valve 19 and the communication pipe 4 by the circulation pump 18 and is sent to the heat exchanger 23 of the indoor unit 5. The hot water heated by the water-refrigerant heat exchanger 15 is circulated through the other connecting pipe 4 and the hot water connection valve 19. Moreover, in order to adjust the amount of hot water circulation to the indoor unit 5, some hot water circulates on the bypass pipe 37 side.

The hot water tank 17 will be described. The hot water tank 17 absorbs the volume of the water in the hot water circuit that expands due to a temperature difference, and also serves as a water supply unit for water supply and water supply during construction. .
The hot water tank 17 has a substantially rectangular parallelepiped casing 38 made of a synthetic resin such as polyethylene or polypropylene. The casing 38 is formed by integrating molded products that are appropriately divided into upper and lower portions by heat welding or ultrasonic welding.

Further, a water supply port 39 for water supply is provided on the upper surface of the hot water tank 17, and the water supply port 39 has a size and a shape into which a water supply hose can be inserted, and foreign matter is mixed into the hot water circuit. It can be set as the structure provided with the filter for preventing this.
On the side surface of the casing 38, an inlet 40 for introducing water circulating in the hot water circuit into the casing 38 and an outlet 41 for discharging the water in the casing 38 are provided. The inlet 40 of the hot water tank 17 is connected to the auxiliary heater 16, and the outlet 41 is connected to the suction side of the circulation pump 18.

  In addition, a groove 42 is formed around the water supply port 39 around the water supply port 39 of the hot water tank 17 so that other parts such as electrical components are not flooded by spilled water. It is provided so as to surround the water supply port 39 except for the opening portion 43 that is configured to guide water spilled around the water supply port 39 to the outside through the opening portion 43. Further, a water level sensor 36 having two electrodes penetrating into the tank is attached to the end of the upper surface of the hot water tank 17.

  When a hot water heater is installed, water supply to the hot water circuit and a trial run are always required. To supply water, remove the water supply lid 12 provided on the top plate of the outdoor unit 1, remove the cap etc. (not shown) of the water supply port 39, insert the tip of the hose into the water supply port 39, and perform the water supply operation. Do. At this time, when the tip of the hose is inserted into or removed from the water supply port 39, water may spill from the tip of the hose to the vicinity of the water supply port 39, or water may overflow from the water supply port 39 due to an excessive amount of water supply. However, the groove 42 provided in the vicinity of the water supply port 39 prevents water from flowing out to the electrical component side, and water is guided downward along the side surface of the hot water tank 17 from the opening 43 to the outside of the outdoor unit 1. It will be drained.

  The height of the water supply port 39 provided on the upper surface of the hot water tank 17 is set to be substantially the same as the height of the main body of the hot water tank 17, a groove 42 is provided around the water supply port 39, and water spilled around the water supply port 39 is placed on the side plate. Since it is guided in the direction, the top surface of the hot water tank 17 can be brought close to the top of the outdoor unit while preventing water from entering the outdoor unit, so the hot water tank 17 becomes compact and the entire outdoor unit Can be made compact.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. Explanatory drawing of the same outline. The top view of the same hot water tank. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outdoor unit 5 Indoor unit 15 Water-refrigerant heat exchanger 17 Hot water tank 39 Water supply port 42 Groove 43 Opening part

Claims (1)

  The indoor unit and the outdoor unit are connected by a connecting pipe, and the hot water heated by the outdoor unit is circulated to the indoor unit for heating. A hot water heating apparatus for storing a water heater, a hot water tank, a hot water circulation circuit comprising a circulation pump, and a refrigeration circuit comprising a compressor, an evaporator, a decompressor and the like, the water supply provided on the upper surface of the hot water tank A hot water heating apparatus characterized in that the height position of the mouth is substantially the same as the height of the hot water tank body, a groove is provided around the water supply port, and water spilled around the water supply port is guided in the lateral direction.

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