JP4436771B2 - Heat exchanger, heat pump type hot water supply device and heat pump type hot water supply and heating device - Google Patents

Heat exchanger, heat pump type hot water supply device and heat pump type hot water supply and heating device Download PDF

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JP4436771B2
JP4436771B2 JP2005041550A JP2005041550A JP4436771B2 JP 4436771 B2 JP4436771 B2 JP 4436771B2 JP 2005041550 A JP2005041550 A JP 2005041550A JP 2005041550 A JP2005041550 A JP 2005041550A JP 4436771 B2 JP4436771 B2 JP 4436771B2
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heat
hot water
refrigerant
tube
heat exchanger
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JP2006226618A (en
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清 小山
聡 星野
重男 机
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三洋エアコンディショナーズ株式会社
三洋電機株式会社
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  The present invention relates to a heat exchanger, more specifically, a heat exchanger for water-to-refrigerant, a heat pump type hot water supply apparatus and a heat pump type hot water supply and heating apparatus provided with the heat exchanger.
This type of conventional heat exchanger is disclosed in, for example, Patent Document 1, and this refrigerant-to-water heat exchanger has a single water (heat exchange liquid) sent from a circulation pump. The first heat exchange pipe and two second heat exchange pipes that are branched in parallel and through which the superheated gas refrigerant (heat medium) flows are provided in a heat exchange relationship. That is, in the first heat exchange pipe, two hollow portions extending along the axial direction are continuously formed at symmetrical positions on the peripheral wall of the first heat exchange pipe, and the second heat exchange pipes are formed in the hollow portions. The first heat exchange pipe and the heat exchange relationship are crimped and fixed.
JP 2003-14383 A
  However, the heat exchanger having the above-described structure has a small heat transfer area and also has a heat loss (escape), so that the heat transfer efficiency is poor and it is desired to further improve the heat exchange rate.
  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to further improve the heat exchange rate by increasing the heat transfer area, reducing heat loss, and enabling uniform heat exchange.
For this reason, the invention related to the first heat exchanger includes a plurality of heat exchange pipes through which a heat medium flows, a heat transfer pipe that covers and holds the plurality of heat exchange pipes in a state of being separated from each other, and the heat transfer pipe And an outer tube that forms a flow path so that the heat exchange liquid flows between the heat transfer tube and the heat transfer pipe with respect to the center of the outer tube by the heat transfer tube. And the flow direction of the heat exchange liquid flowing between the heat transfer tube and the outer tube and the flow direction of the heat medium flowing in the heat exchange pipe are opposite to each other. .
The invention relating to the second heat pump hot water supply apparatus includes a compressor, a decompression device, a water-refrigerant heat exchanger for hot water storage, and a heat pump unit including a refrigerant circuit formed by sequentially connecting an air heat exchanger, and the water In a heat pump hot water supply apparatus comprising a tank unit having a hot water circulation path for circulating hot water between a refrigerant heat exchanger and a hot water storage tank by a circulation pump , a heat medium flows through the water refrigerant heat exchanger. A plurality of heat exchange pipes, a heat transfer pipe that covers and holds the plurality of heat exchange pipes in a state of being separated from each other, and a heat exchange liquid is located between the heat transfer pipe and the heat transfer pipe. The heat exchange pipe is radially arranged by the heat transfer tube with respect to the center of the outer tube, and is formed between the heat transfer tube and the outer tube. Flowing heat exchange Characterized in that a of the flow direction and the flow direction of the heat medium flowing through the heat exchange pipe to the opposite direction.
The invention relating to the third heat pump hot water supply and heating device includes a compressor, a parallel circuit of a first water refrigerant heat exchanger for heating and a second water refrigerant heat exchanger for hot water storage, each connected to a pressure reducing device, air Heat water is circulated by operating the first circulation pump between the heat pump unit having a refrigerant circuit in which the heat exchangers are sequentially connected in an annular form, the expansion tank, the first water refrigerant heat exchanger, and the hot water heater. In a heat pump hot water supply and heating apparatus, comprising: a first hot water circulation path and a tank unit having a second hot water circulation path for circulating hot water between the second water refrigerant heat exchanger and the hot water storage tank by a second circulation pump. The first water refrigerant heat exchanger or the second water refrigerant heat exchanger has a plurality of heat exchange pipes through which a heat medium flows and a plurality of heat exchange pipes that are covered and held in a state of being separated from each other. Heat pipe and this transmission And positioned external to the pipe consist of an outer tube forming a flow path to flow the Hinetsu exchange fluid between the heat transfer tubes, the heat by the heat transfer tube with respect to the center of the outer tube The exchange pipes are arranged radially, and the flow direction of the heat exchange liquid flowing between the heat transfer tube and the outer tube is opposite to the flow direction of the heat medium flowing in the heat exchange pipe. And
  According to the heat exchanger, heat pump type hot water supply apparatus, and heat pump type hot water supply / room heating apparatus of the present invention, the heat transfer area is increased, heat loss is reduced, heat can be uniformly exchanged, and the heat exchange rate is further improved. Can be planned.
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a system diagram showing an overall system of a heat pump hot water supply / room heating system. In FIG. 1, A is a heat pump unit, B is a tank unit, C1 is a first hot water circuit for hot water heating, C2 is a second hot water circuit for hot water storage, and R is a refrigerant circuit built in the heat pump unit A. is there. In the refrigerant circuit R, a refrigerant such as HFC or CO 2 can be used, but CO 2 is used in the present embodiment.
  1 and 2 are floor heating panels provided in the first hot water circulation path C1, and 3 and 4 are floor heating remote controllers provided corresponding to the floor heating panels 1 and 2 (hereinafter referred to as "floor heating remote control"). In the first hot water circulation path C1, thermal valves 5 and 6, a circulation pump 7, an expansion tank 8, a water flow path 9B of the first water refrigerant heat exchanger 9 for heating, and a bypass pipe 10 are provided. A bypass valve 11 which is a provided flow rate adjusting valve is provided.
  The bypass pipe 10 serves as a bypass path of the first hot water circulation path C1, and when the bypass valve 11 configured by, for example, an electric valve is opened, the water flow path 9B of the first water refrigerant heat exchanger 9 is opened. The return warm water passing through is returned to the expansion tank 8 via the bypass pipe 10. The expansion tank 8 is provided with water level electrodes 19 and 20 constituting a water level detection sensor.
  The hot water circuit C1 is provided with a thermistor 12 for detecting the temperature of the hot water flowing out from the water flow path 9B of the first water refrigerant heat exchanger 9 for heating, and a fan coil 13 as a bathroom heating device. ing. 14 is a bathroom heating remote controller (hereinafter referred to as “bathroom heating remote controller”), 15 is a thermal valve provided at the inlet of the fan coil 13, and 16 is one of hot water flowing out from the expansion tank 8 by the circulation pump 7. The mixed heat valve 18 for supplying a part to the floor heating panels 1 and 2 is a thermistor 18 for detecting the temperature of hot water flowing into the floor heating panels 1 and 2.
The refrigerant circuit R includes a two-stage compression compressor 21 capable of capacity adjustment using a CO 2 refrigerant, a heating first on-off valve 23 whose one end is connected to the compressor 21, and a hot water storage For the hot water storage connected to the second on-off valve 24, the refrigerant passage 9A of the first water refrigerant heat exchanger 9 connected to the other end of the first on-off valve 23, and the other end of the second on-off valve 24. The primary flow path 22A of the second water refrigerant heat exchanger 22, the primary flow path 25A of the internal heat exchanger 25 to which the refrigerant flow path 9A is connected, and the heating flow rate to which the other end of the primary flow path 25A is connected. An expansion valve (pressure reducing device) 26 that is a regulating valve, an expansion valve (pressure reducing device) 27 for hot water storage that is a flow rate regulating valve to which the other end of the primary flow path 22A is connected, an air heat exchanger 28, and an internal heat exchanger The 25 secondary flow paths 25B and the accumulator 29 are sequentially connected in a circular pipe.
  In the second hot water circulation path C2, one end of the water flow path 22B of the second water refrigerant heat exchanger 22 and the lower part of the hot water storage tank 31 are connected via a circulation pump 32, and the other end of the water flow path 22B and the hot water storage capacity. The thermistor 33 is connected to the upper part of the tank 31 and detects the temperature of the hot water flowing out from the water flow path 22B of the second water refrigerant heat exchanger 22 between the other end of the water flow path 22B and the upper part of the hot water storage tank 31. It is provided in the 2nd warm water circulation path C2.
  The hot water storage tank 31 is connected with a primary flow path 34 </ b> A for reheating water heat exchanger 34 through a circulation pump 35. A bathtub 37 is connected to the secondary flow path 34 </ b> B of the water heat exchanger 34 via a circulation pump 36. A hot water supply pipe 40 is connected to the upper part of the hot water storage tank 31, and a mixing valve 41 is provided in the hot water supply pipe 40. 42 is a water supply pipe provided with a pressure reducing valve 43 and connected to a water pipe. This water supply pipe 42 is branched and connected to the lower part of the hot water storage tank 31 and the mixing valve 41, and further via the replenishing water opening / closing valve 44. It is connected to the expansion tank 8.
  The hot water storage tank 31 is provided with a hot water temperature detection sensor 45. Since the boiling temperature is up to 85 ° C., there is residual hot water when the hot water temperature detected by the hot water temperature detection sensor 45 is 55 ° C. or higher. If the temperature is lower than 55 ° C., it is determined that the emergency is about to run out. At this time, the location where the hot water temperature detection sensor 45 is disposed is a position where the amount of remaining hot water that can be used is, for example, 50 liters.
  When the room is warmed up, the floor heating panels 1 and 2 do not radiate much heat, and high temperature water of 50 to 60 ° C. is supplied from the expansion tank 8 to the first water refrigerant heat exchanger 9. The first water refrigerant heat exchanger 9 does not exchange much heat, the refrigerant temperature becomes high, and a high load is applied to the compressor 21. Therefore, the internal heat exchanger 25 is provided in addition to the first water refrigerant heat exchanger 9 as a cooling mechanism for the refrigerant having reached a high temperature. Since the heat radiation in the internal heat exchanger 25 is taken into the refrigerant after passing through the air heat exchanger 28 in the same refrigerant circuit R, the heat absorption efficiency of the refrigerant circuit R is also improved. Further, the thermistor 50 is for controlling the compressor 21 to be stopped to protect the compressor 21 when detecting that the refrigerant has reached a predetermined high temperature.
  Reference numeral 46 is a kitchen remote controller (hereinafter referred to as “kitchen remote control”), and 47 is a bath remote controller (hereinafter referred to as “bath remote control”).
  The heat pump unit A and the tank unit B are provided with printed circuit boards K1 and K2, respectively. The printed circuit board K1 is equipped with a control device (control means) S1 composed of a microcomputer, and the printed circuit board K2 has a timer. A control device (control means) S2 comprising a microcomputer to which T is connected is mounted.
  Next, the first water refrigerant heat exchanger 9 will be described with reference to FIGS. 57 is a hot water inlet joint for forming the first hot water circulation path C1 with the tank unit B provided on the back surface of the heat pump unit main body 51, and 58 is a hot water outlet joint. A hot water outlet pipe 60 communicating with the hot water inlet joint 57 and a plurality of refrigerant return pipes 64 communicating with the primary flow path 25A of the internal heat exchanger 25 are connected by a joint 61 to form a multiple pipe 62. The other end of the pipe 62 is connected to a hot water return pipe 67 that communicates with the hot water outlet joint 58 via the joint 63 and a plurality of refrigerant forward pipes 65 that communicate with the compressor 21 via the first on-off valve 23. Branch.
As shown in FIG. 4, which is a cross-sectional view taken along the line AA of the joint 63, for example, three (a plurality) copper heat exchange pipes 70 (each refrigerant flow path 9A) through which the refrigerant (heat medium) flows are disposed in the multiple pipe. And a heat transfer pipe 71 made of copper that covers and holds the heat exchange pipes 70 in a separated state, and the heat transfer pipe 71 is disposed outside the heat transfer pipe 71 with a relatively large interval. It is composed of a copper outer pipe 72 that forms a water flow path 9B so that hot water (heat exchange liquid) flows between the heat pipe 71 and the refrigerant flow and the hot water flow are opposite to each other. ). In this case, if the parallel flow (parallel flow) is used, the average temperature difference between the refrigerant and the hot water is smaller than the counter flow and the superheated part becomes longer, and the heat exchange rate is not good with respect to the counter flow (counter flow). (Opposite flow). As shown in FIG. 4, the three heat exchange pipes 70 are covered with the heat transfer tubes 71 in a state of being separated from each other, and are arranged radially with respect to the center of the outer tube 72.
As shown in FIG. 5, for example, three (plural) copper heat exchange pipes 70 (which constitute each refrigerant flow path 9 </ b> A) through which the multiple pipes 62 flow (refrigerant (heat medium)) and the respective heat exchanges. A copper heat transfer tube 71 that covers and holds the pipe 70 in a separated state, and hot water (heat exchange) is provided between the heat transfer tube 71 and the heat transfer tube 71. The copper outer tube 73 forms the water flow path 9B so that the liquid flows, and the refrigerant flow and the hot water flow are opposite to each other and are countercurrent (counterflow). As shown in FIG. 5, also in this multiple tube 62, the three heat exchange pipes 70 are covered with the heat transfer tubes 71 in a state of being separated from each other, and radially with respect to the center of the outer tube 73. Is arranged.
  The outer tubes 72 and 73 have a hollow cylindrical shape in cross section, but are not limited to this and may have other shapes such as a hollow elliptical cylindrical shape.
  The control devices S1 and S2 correspond to the operation signals from the floor heating remote controls 3 and 4, the bathroom heating remote control 14, the kitchen remote control 46 and the bath remote control 47 and the temperature signals of the thermistors 12, 17, 18, 33 and 50. The operation and frequency control of the compressor 21, the operation control of the circulation pumps 7 and 32, the opening and closing control of the thermal valves 5, 6 and 16, the opening control of the expansion valves 26 and 27, etc. Will be explained.
<Hot-water supply operation>
When an operation signal from the kitchen remote controller 46 or the bath remote controller 47 is input to the control device S2, the signal is transmitted from the control device S2 to the control device S1, and hot water is stored in the hot water storage tank 31. That is, the circulation pump 32 is operated by the control device S1, and in the second hot water circulation path C2, the hot water storage tank 31 → the circulation pump 32 → the water flow path 22B of the second water refrigerant heat exchanger 22 → the hot water storage tank 31 in this order. Hot water flows and the hot water is stored in the hot water storage tank 31.
  On the other hand, in the heat pump unit A, the control device S1 operates the compressor 21 to open the second opening / closing valve 24 and the hot water storage expansion valve 27. In the refrigerant circuit R, the compressor 21 → second opening / closing valve 24 → hot water storage. Refrigerant flow path 22A of the second water refrigerant heat exchanger 22 for hot water → expansion valve 27 for hot water storage → air heat exchanger 28 → secondary flow path 25B of the internal heat exchanger 25 → accumulator 29 → compressor 21 in this order. The refrigerant flows. At this time, since heating is not performed, the first on-off valve 23 and the heating expansion valve 26 are closed.
  The temperature of the hot water supplied to the hot water storage tank 31 is 65 ° C. to 85 ° C. The frequency of the compressor 21 is controlled so that the temperature detected by the thermistor 33 becomes this temperature, and the valve opening of the expansion valve 27 for hot water storage. Control is performed by the control device S1.
  The hot water stored in the hot water storage tank 31 is added with tap water of about 15 ° C. from the water supply pipe 42, adjusted to an appropriate temperature by the mixing valve 41, and filled with hot water from the hot water supply pipe 40 to the kitchen or bathtub 37. Used. When hot water is supplied, water is supplied from the water supply pipe 42 to the hot water storage tank 31. In addition, by operating the circulation pumps 35 and 36, the hot water in the hot water storage tank 31 and the hot water in the bathtub 37 are exchanged by the water heat exchanger 34 for replenishment, and the hot water in the bathtub 37 is replenished. You can also.
  In the case of the normal hot water supply operation as described above, the frequency control of the compressor 21 is performed so that the capacity of the compressor 21 of the heat pump unit A having the capacity of 9.0 kW becomes, for example, about 6.0 kW which is efficient. The valve opening control of the hot water storage expansion valve 27 is performed by the control device S1. However, if the amount of remaining hot water that can be used is 50 liters, the hot water temperature detected by the hot water temperature detection sensor 45 is less than 55 ° C., and it is determined that there is an emergency just before the hot water runs out, the compressor 21 of the heat pump unit A The control device S1 performs frequency control of the compressor 21 and control of the opening degree of the expansion valve 27 for hot water storage so that the capacity becomes 9.0 kW.
<Floor heating operation>
Next, when performing floor heating by the floor heating panel 1 or 2, the operation switch of the floor heating remote control 3 or 4 attached to the wall surface or the like of the room is turned on. Then, the control valve S2 that has received the operation signal gradually opens the corresponding thermal valve 5 or 6 and the circulation pump 7 operates. Therefore, until the thermal valve 5 or 6 is fully opened (until fully opened), the control device S2 controls the bypass valve 11 to be in a half-open state, for example.
  That is, since it takes a predetermined time for the thermal valve 5 or 6 to be fully opened after starting the opening operation, the time is set in the timer T, and the timer T determines the elapse of the set predetermined time. When the time is counted, the control device S2 controls the bypass valve 11 so as to be changed from the half-open state to the closed state.
  For this reason, the control device S2 controls the bypass valve 11 to be in a half-open state until the predetermined time elapses after the timer T starts counting, and in the first hot water circulation path C1, the expansion tank 8 The hot water flows in the order of the circulation pump 7, the water flow path 9 B of the first water refrigerant heat exchanger 9, the bypass valve (half-open state) 11, and the expansion tank 8.
  Then, when the timer T counts the set predetermined time, the control device S2 controls the bypass valve 11 so as to change from the half-open state to the closed state. Therefore, in the first hot water circulation path C1, the expansion tank 8 → the circulation pump 7 → the water flow path 9B of the first water refrigerant heat exchanger 9 → the thermal valve 5 or 6 → the floor heating panel 1 or 2 → the expansion tank 8 Hot water flows in sequence, and all of the hot water can be supplied to the floor heating panel 1 or 2.
  On the other hand, when the operation switch of the floor heating remote controller 3 or 4 is turned on, the compressor 21 of the heat pump unit A is operated by the control device S1 to which the operation signal is transmitted from the control device S2, and the first on-off valve 23 is In the refrigerant circuit R, the compressor 21 → the first on-off valve 23 → the refrigerant flow path 9A of the first water / refrigerant heat exchanger 9 for heating → the primary flow path 25A of the internal heat exchanger 25 → the expansion valve for heating The refrigerant flows in the order of 26 → air heat exchanger 28 → secondary flow path 25B of internal heat exchanger 25 → accumulator 29 → compressor 21. At this time, since hot water is not stored, the second on-off valve 24 and the hot water expansion valve 27 are closed, and no refrigerant flows through the primary flow path 22A of the hot water water refrigerant heat exchanger 22.
  In the above case, in the first water refrigerant heat exchanger 9, the multiple pipe 62 includes a plurality of heat exchange pipes 70 (which constitute each refrigerant flow path 9 </ b> A) through which the refrigerant flows, and the heat exchange pipes 70. The heat transfer pipe 71 that is covered and held in a separated state and the water flow path 9B is formed so that warm water flows between the heat transfer pipe 71 and the heat transfer pipe 71 with a slight space therebetween. The outer heat pump 73 is configured to increase heat transfer area, reduce heat loss and allow uniform heat exchange, and further improve the heat exchange rate. Is reduced and energy is saved.
  The temperature of the hot water supplied to the floor heating panel 1 or 2 is 60 to 70 ° C., but the frequency control of the compressor 21 and the heating expansion valve 26 are performed so that the temperature of the hot water detected by the thermistor 12 becomes this temperature. Is controlled by the control device S1.
  In addition, the floor heating control detects the room temperature by a room temperature thermistor (not shown) mounted on the floor heating remote controller 3 or 4, and controls the opening or closing of the thermal valve 5 or 6 based on the deviation between the set temperature and the room temperature. The control device S2 controls the amount of hot water to the floor heating panel 1 or 2.
  In addition, when floor heating is simultaneously performed on the floor heating panels 1 and 2, the operation valves of the floor heating remote controllers 3 and 4 are turned on to similarly control the opening and closing of the thermal valves 5 and 6, so that the floor heating panel 1 and Warm water is supplied to 2 and individual control of floor heating is possible by individually controlling the amount of warm water to the floor heating panels 1 and 2.
  When such a floor heating operation is performed, when the floor heating room is warmed, the amount of heat released from the floor heating panels 1 and 2 is reduced, and the expansion tank 8 to the water flow path 9B of the water refrigerant heat exchanger 9 50-60 degreeC warm water will be supplied. For this reason, the water / refrigerant heat exchanger 9 does not perform much heat exchange, the refrigerant temperature becomes high, and the compressor 21 is loaded. The internal heat exchanger 25 is provided as a cooling mechanism for the refrigerant in such a case, and the heat release in the primary flow path 25A of the internal heat exchanger 25 is two of the internal heat exchanger 25 in the same refrigerant circuit R. Since it is absorbed again by the next flow path 25B, the refrigerant circuit R can be configured without waste and without reducing efficiency.
<Bathroom heating operation>
Next, when performing hot air heating of the bathroom by the fan coil 13, the operation switch of the bathroom heating remote controller 14 is turned on. Then, the control device S2 opens the thermal valve 15 at the inlet of the fan coil 13 and controls the bypass valve 11 to be in a half-open state, thereby controlling the circulation pump 7 to operate. Accordingly, in the first hot water circulation path C1, the hot water flows in the order of the expansion tank 8, the circulation pump 7, the water flow path 9B of the first water refrigerant heat exchanger 9 for heating, the bypass valve 11 (half-open state), and the expansion tank 8. At the same time, the hot water flows in the order of the expansion tank 8 → the circulation pump 7 → the water flow path 9B of the first water-refrigerant heat exchanger 9 for heating → the thermal valve 15 → the fan coil 13 → the expansion tank 8.
  The operation of the heat pump unit A and the refrigerant circulation are the same as in the floor heating operation, and hot water is not stored. Therefore, the second on-off valve 24 and the thermal valve 27 are closed, and the primary flow path 22A of the water-refrigerant heat exchanger 22 is closed. Does not flow refrigerant.
  The temperature of the hot water supplied to the fan coil 21 is 80 ° C., and the hot water control for that is the same as in the floor heating operation. Further, the bathroom heating control by the control device S2 is performed by detecting the room temperature by a room temperature thermistor (not shown) mounted on the fan coil 13, controlling the fan rotational speed, and controlling the opening and closing of the thermal valve 15.
  In the case of floor heating operation or bathroom heating operation as described above, the frequency control of the compressor 21 is performed so that the capacity of the compressor 21 of the heat pump unit A having the capacity of 9.0 kW is, for example, about 7.0 kW. The valve opening control of the heating expansion valve 26 is performed by the control device S1.
<Simultaneous operation of floor heating and bathroom heating>
When floor heating by the floor heating panels 1 and 2 and bath room temperature heating by the fan coil 13 are performed simultaneously, the operation switches of the respective remote controllers 3, 4 and 14 are turned on. Then, the control valve S2 that has received the operation signal gradually opens the corresponding thermal valve 5 or 6 and opens the thermal valve 15 so that the circulation pump 7 operates. Therefore, the control device S2 controls the bypass valve 11 to be in a half-open state until the thermal valve 5 or 6 is completely opened, that is, until a predetermined time by the timer T elapses.
  For this reason, the control device S2 controls the bypass valve 11 to be in a half-open state until the predetermined time elapses after the timer T starts counting, and in the first hot water circulation path C1, the expansion tank 8 The hot water flows in the order of the circulation pump 7 → the water flow path 9B of the first water / refrigerant heat exchanger 9 → the bypass valve (half-open state) 11 → the expansion tank 8 and the expansion tank 8 → the circulation pump 7 → the first water for heating. Hot water flows in the order of the water flow path 9B of the refrigerant heat exchanger 9 → the thermal valve 15 → the fan coil 13 → the expansion tank 8.
  Then, when the timer T counts the set predetermined time, the control device S2 controls the bypass valve 11 so as to change from the half-open state to the closed state. Therefore, in the first hot water circulation path C1, the expansion tank 8 → the circulation pump 7 → the water flow path 9B of the first water refrigerant heat exchanger 9 → the thermal valve 5 or 6 → the floor heating panel 1 or 2 → the expansion tank 8 While warm water flows in order, the warm water flows in the order of the expansion tank 8 → the circulation pump 7 → the water flow path 9 </ b> B of the first water refrigerant heat exchanger 9 for heating → the thermal valve 15 → the fan coil 13 → the expansion tank 8.
  Although the hot water temperature control by the thermistor 12 at this time is 80 ° C., the temperature is too high as hot water for the floor heating panels 1 and 2. In order to solve this problem, the mixing heat valve 16 is opened to mix the warm water from the expansion tank 8 with the warm water at 80 ° C. so that the temperature of the warm water detected by the thermistor 18 is 60 to 70 ° C. I have control. Further, when the temperature of the medium temperature water becomes excessively low and the temperature becomes low, the mixing heat valve 16 is closed, and the control device S2 performs opening / closing control of the heat valve 16 based on the temperature detected by the thermistor 18.
  The operation of the heat pump unit A and the refrigerant circulation are the same as the floor heating operation or the bathroom heating operation, and no hot water is stored. Therefore, the second on-off valve 24 and the thermal valve 27 for hot water storage are closed, and the hot water storage water is stored. The refrigerant does not flow in the primary flow path 22A of the refrigerant heat exchanger 22.
  In the case of the simultaneous operation of floor heating and bathroom heating as described above, the frequency of the compressor 21 is set so that the capacity of the compressor 21 of the heat pump unit A having the capacity of 9.0 kW is, for example, about 7.0 kW. Control and control of the opening degree of the expansion valve 26 for hot water storage are performed by the control device S1.
  Furthermore, as in the second embodiment as shown in FIG. 6, a plurality of copper heat exchange pipes 70 (which constitute each refrigerant flow path 9 </ b> A) through which refrigerant flows through the multiple pipe 62, and each of these heats. A copper heat transfer tube 74 that is covered and held in a state where the exchange pipes 70 are in contact with each other, and a predetermined interval is provided outside the heat transfer tube 74 so that hot water flows between the heat transfer tubes 74. Alternatively, a copper outer tube 75 that forms the water flow path 9B may be used.
  Although this embodiment has a smaller heat transfer area than that of the first embodiment, there is little heat loss, heat can be exchanged uniformly, and a further improvement in the heat exchange rate can be achieved.
  In the first and second embodiments, the first water refrigerant heat exchanger 9 is configured as described above. However, the present invention is not limited to this, and the second water refrigerant heat exchanger 22 is configured similarly. Can do. In this case, conventionally, there is no heat transfer tube 71 of this embodiment, a special leak detection tube is provided, and the coolant leaks from the heat exchange pipe 70 so that hot water flows between the outer tubes 72, 73, and 75. Although the problem of being mixed in the passage 9B has been dealt with, such a problem can also be solved by the heat transfer tube 71.
  Although the embodiments of the present invention have been described above, various alternatives, modifications, and variations can be made by those skilled in the art based on the above description, and the various alternatives and modifications described above are within the scope of the present invention. Or a modification is included.
It is a whole system diagram of a heat pump type hot water supply and heating device. It is a front view of the 1st water refrigerant heat exchanger. It is a right view of a 1st water refrigerant | coolant heat exchanger. It is AA sectional drawing of FIG. It is sectional drawing of a multiple tube. It is sectional drawing of the multiple tube of 2nd Embodiment.
Explanation of symbols
7 Circulation Pump 9 First Water Refrigerant Heat Exchanger 21 Compressor 22 Second Water Refrigerant Heat Exchanger 26 Heating Expansion Valve 27 Hot Water Storage Expansion Valve 31 Hot Water Storage Tank 32 Circulation Pump 62 Multiple Tube 70 Heat Exchange Pipe 71 Heat Transfer Tube 72, 73, 75 Outer pipe A Heat pump unit B Tank unit C1 First hot water circuit for hot water heating C2 Second hot water circuit for hot water storage R Refrigerant circuit

Claims (3)

  1. A plurality of heat exchange pipes through which a heat medium flows, a heat transfer pipe that covers and holds the plurality of heat exchange pipes apart from each other, and a heat transfer pipe that is located outside the heat transfer pipe and between the heat transfer pipes And an outer tube that forms a flow path so that the heat exchange liquid flows, and the heat exchange pipe is arranged radially by the heat transfer tube with respect to the center of the outer tube, and the heat transfer tube and the outer tube heat exchanger, characterized that you have the flow direction and the opposite direction of the heat medium flowing through the flow direction of the heat exchange fluid to the heat exchange pipe to flow between the tubes.
  2. A heat pump unit having a refrigerant circuit in which a compressor, a pressure reducing device, a hot water refrigerant heat exchanger and an air heat exchanger are sequentially connected in an annular shape, and circulated between the water refrigerant heat exchanger and the hot water storage tank In a heat pump hot water supply apparatus comprising a tank unit having a hot water circulation path for circulating hot water by a pump, the water refrigerant heat exchanger includes a plurality of heat exchange pipes through which a heat medium flows, and the plurality of heat exchanges. from a heat transfer tube that holds and covers the pipe to be apart from each other, located outside of the heat transfer tube and the outer tube to form a flow path to flow the Hinetsu exchange fluid between the heat transfer tube The heat exchange pipe is radially arranged by the heat transfer tube with respect to the center of the outer tube, and the flow direction of the heat exchange liquid flowing between the heat transfer tube and the outer tube and the heat exchange are configured. Heat flowing in the pipe The heat pump type hot water supply device, characterized in that the body of the flow direction and a reverse.
  3. A compressor, a parallel circuit of a first water refrigerant heat exchanger for heating and a second water refrigerant heat exchanger for hot water storage, each connected to a decompressor, and a refrigerant circuit formed by sequentially connecting an air heat exchanger in an annular shape A heat pump unit comprising: an expansion tank; a first hot water circulation path for circulating hot water between the first water refrigerant heat exchanger and the hot water heating device by operating a first circulation pump; and the second water refrigerant heat exchange In the heat pump hot water supply and heating device comprising a tank unit having a second hot water circulation path for circulating hot water between the water heater and the hot water storage tank by the second circulation pump, the first water refrigerant heat exchanger or the second water The refrigerant heat exchanger includes a plurality of heat exchange pipes through which a heat medium flows, a heat transfer pipe that covers and holds the plurality of heat exchange pipes in a state of being separated from each other, and is positioned outside the heat transfer pipe. Heat exchange with this heat transfer tube Constructed from an outer tube to form a flow path to flow is, as well as radially arranged the heat exchange pipe by the heat exchanger tube with respect to the center of the outer tube, between said outer tube and said heat transfer tube The heat pump type hot water supply and heating device , wherein the flow direction of the heat exchange liquid flowing through the heat exchange liquid and the flow direction of the heat medium flowing through the heat exchange pipe are reversed .
JP2005041550A 2005-02-18 2005-02-18 Heat exchanger, heat pump type hot water supply device and heat pump type hot water supply and heating device Expired - Fee Related JP4436771B2 (en)

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